CN101540505A - Building method of multistage multi-region interconnected network data model - Google Patents
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Abstract
The invention relates to a building method of a multistage multi-region interconnected network data model. Data of a whole power network system is divided according to the range of dispatching of power networks, all stages of all dispatching centers of the network system respectively build data models, if correlation exists between the two dispatching centers, the upper-stage dispatching center defines an equivalent port model of the relating dot between the two dispatching centers, the equivalent port model corresponds to an external power network system related with each local sub-network system; the operating mode of the power network system adopts a cooperative mode of reporting the plan by the lower-stage dispatching center, adjusting by the upper-stage dispatching center, amending by the lower-stage dispatching center, and finally confirming by the upper-stage dispatching center; after the operating mode of the network system is determined, the multistage multi-region data model combination is performed; when certain equipment has a change event in the data model, the change processes the event in the whole power network system by adopting a model change coping mechanism.
Description
Technical field
The present invention relates to move relatively independent, related multistage, multi-region interconnected network operational mode analyzed the construction method of data model each other, be particularly useful for that electromagnetic looped network unlinks, the establishment of burst operation electric power system data model, share and maintenance.
Background technology
Current domestic electrical network is according to the operation of layering, partition management mode, and " layering " is meant that grid dispatching center is divided into different ranks, as: net transfer, economize transfer, transfer etc.; " subregion " is meant that the same levels grid dispatching center divides according to the zone.As shown in Figure 1, the management of power equipment, operational mode in " layering " management shows as the specific region again in the real system operation, as net transfer be in charge of 500kV factory station, stand between interconnection and economize between the interconnection trend, economize transfer be in charge of 220kV factory stand, stand between interconnection and the 220kV off line trend etc. of standing.
Under electric power system layering, the partition management mode, the electric network data model is safeguarded jointly that by the different subjects of control centres at different levels each main body is responsible for the part in its compass of competency, and the data model management is consistent with the power equipment management in the division of power and responsibility.
The power system operation mode analysis comprises contents such as trend calculating, static security stability analysis, transient stability analysis, the analysis of transient stability nargin, Transient Stability Control analysis of strategies, dynamic (microvariations) stability analysis.Trend is calculated the steady operation point of determining system, is to carry out the basis that operational mode is analyzed; For inter-related two systems, if relating dot exchange power (P, Q) is known, a system can be firm power load or generator with the another one system equivalent, calculates and relevant static security stability analysis thereby separately one of them system is carried out trend; Trend can be determined each branch road trend (P, Q) and each node voltage (U) in the system after calculating.If a system is associated with other system, its transient state and dynamic stability characteristic will be subjected to the influence of interconnected system, when doing this type of network analysis, and need be based on a plurality of systems or whole network data model.
Under traditional mode, the whole network data model is integrated by each main body institute Maintenance Model and is formed, and is that all main bodys are shared.Fig. 2 analyzes required system data model schematic diagram for economizing adjusting system, and on the one hand, network analysis will be based on the whole network model; On the other hand, each main body is only safeguarded the part in the total system model, and the two certainly exists certain contradiction, and this contradiction shows:
(1) integration of the whole network system model is generally according to carrying out step by step from the subordinate to higher level, integrates each time all by the five-star main body property held wherein, can not effectively bring into play the coordination and the management function of senior main body;
(2) change when a certain main body institute's Maintenance Model or parameter, this variation of inevitable requirement has on the main body of this model at all to be upgraded synchronously, can't realize this target efficiently, reliably at present, the management and the maintenance work of whole network data model also are heavy burdens simultaneously;
(3) the whole network model of integrating of each power grid operation main body, can not effectively guarantee trend calculate be convergence, trend distributes is rational; This pattern of carrying out the operational mode analysis after all data models are concentrated again and power equipment and model are not in tune by the pattern that different subjects administers and maintains respectively, and can not effectively embody the cooperation relation of control centres at different levels in the power system operating mode Plans And Analysis;
(4) analysis of the whole network system operation mode is in order to realize higher level cooperation, some the time need adopt the centralized calculation form, the operational mode personnel of relative subject are concentrated on same place a certain period, adopt the artificial form of coordinating, carry out the research of operational mode analysis and control strategy.This cooperation equally will be based on the whole network data model, if a certain unit data model maintenance work lags behind, the whole network network analysis work can't effectively be carried out, if a certain device parameter needs to revise in analyzing, all participate in calculating personnel and all will make amendment to data separately; The cooperation of this artificial tissue has requirement to personnel, time, place in running, limited the convenience of network analysis work, can not make full use of operational mode human resources in the whole network; This cooperation all needs direct dependence to " people " from initiating, be organized into task division, can not effectively guarantee the quality and the efficient of cooperating.
By the distributed coordination between the distinct device manager in the electrical network with cooperate; realize the whole network system model structure, maintenance and operational mode management; system model can be served for network analysis again in the while that is effectively protected with providing convenience, become the problem that power system operation and manager have to face.
The electric power system tide computation model can be with reference to " electric power system calculating ", and Xi'an Communications University etc. compile in collaboration with six institutes, and hydraulic and electric engineering publishing house published the 118th page in 1978.
Power system operation mode is analyzed domestic main tool to be had: BPA, PSASP etc.; External main tool has: PSS/E, NETOMAC, EUROSTAG etc.
Summary of the invention
The present invention seeks to: at current domestic operation of power networks management new situations and different stage control centre operational mode characteristics, a kind of different stage that can be applicable to is proposed, the zones of different control centre, support to coordinate therebetween and cooperate, realize the construction method of the multistage multi-region interconnected network data model of whole network data modelling and operational mode management, to solve the electric network model Decentralization, safeguard problem and the contradiction brought, in establishment of system data model and mode management process, make full use of at different levels, control centre, various places operational mode human resources, the coordination and the management function at performance high-level scheduling center, make the grid equipment management, data model is safeguarded with the operational mode management and is effectively united, thereby helps promoting the electrical network layering, the cooperation management general layout of subregion.
Technical solution of the present invention is: the construction method of multistage multi-region interconnected network data model, it is characterized in that: whole network system data are divided according to the dispatching of power netwoks administrative area, network system each control centre at different levels sets up data model respectively, if exist related between certain two control centre, then defined the equivalent port model of relating dot between these two control centres by the upper level control centre, the equivalent port model external electrical network system related with each this background network system is corresponding; The system operation mode of electrical network adopts the newspaper plan of next stage control centre, the adjustment of upper level control centre, next stage control centre to revise, and the final collaboration mode of confirming in upper level control centre carries out; The network system operational mode is carried out the multistage multi-region data model combination after determining, for the upper level control centre, can obtain data model from the subordinate control centre, replaces corresponding equivalent port model, realizes major network and subsystem data model combination; For the subordinate control centre, can obtain the external electrical network data model corresponding by the higher level control centre with the equivalent port model of local power grid system relationship, realize subsystem and external electrical network data model combination, so that in big scale of power, the local power grid system is analyzed; And the constraint that the combination of data model is provided with by the data model authority, each control centre can only make up data model in the extent of competence, and data model can not be visited beyond the authority; When the incident that a certain equipment changes in data model, this variation is adopted model to change coping mechanism and handle this incident in the full electric network system;
(1) each control centre of multistage power network dispatching system (being the local power grid subsystem) independently sets up data model respectively, by relating dot between the electrical network subsystem is set up equivalent port model, it is the equivalent port model of relating dot between certain two control centre, with inter-related electrical network decoupling zero is a plurality of grid subsystems, and the equivalent port model external electrical network system related with this background network system is corresponding; Equivalent port model is the part in the electric network data model, and its content comprises: port title, two interrelated control centre principal name, tie point bus name and electric pressure, equivalent port form (generator or load) and equivalent port parameters, port trend information (P, Q, U);
(2) each control centre can use local power grid system data model and equivalent port model trend information and carries out trend and calculate and the steady stability safety analysis, network system operational mode (plan) is determined the exchange power between interrelated electrical network subsystem, higher level control centre carries out trend according to exchange power between local power grid system and external electrical network system and calculates, determine and external electrical network system relationship point voltage, thereby form complete equivalent port model trend information (P, Q, U), constraints as subordinate's control centre's trend calculating, realize each control centre's trend calculating successively downwards step by step, each control centre can independently carry out static security analysis on this basis;
(3) data model between the network system control centre as seen, can obtain other control centres of this control centre's direct correlation by the equivalent port model that the control centre is defined, the data model of these direct correlation control centres is visible for this control centre; Can obtain other control centres of indirect association by other control centre's data model medium value port model, the data model of these indirect association control centres also is visible for this control centre; The data model content comprises flow data (network equipment parameters such as bus, circuit, transformer), stablizes data (equipment and control system parameter such as generator, SVC, direct current) and equivalent port model data;
(4) data model with other control centres is incorporated into local and the combination of local power grid system data model, in fairly large system, the local power grid system is carried out transient state or dynamic stability safety analysis, data model combination comprises the flow data model, stablize the combination of data model and equivalent port model, as paired equivalent port appears, these two ports are cancelled out each other to the constraints that system load flow distributes, be converted into a node, by this node, the data model of different system is communicated with, as paired equivalent port model not occurring, directly a plurality of system data models are made up, the combination of a plurality of system data models does not influence each system in and exchanges power between trend distribution and system.
Equivalent port model: two network systems of different stage, zones of different (as local power grid and adjacent area electrical network) if between existence related, their external systems each other then, in arbitrary control centre, external system embodies with equivalent port model form.Equivalent port model is paired,, must have the opposing party and is subjected to from certain network system as sending electricity to certain network system a side; The system relationship relation of equivalent port model representative is unique, and a plurality of equivalent port model can not cause system topological annexation confusion.Equivalent port model content should comprise: port title, two interrelated control centre principal name, tie point bus title and electric pressure, equivalent port form (generator or load) and equivalent port parameters, port trend information (voltage, trend is meritorious, idle: numerical value is just being represented to send electricity, numerical value negative indication to be subjected to electricity from local system to local system, and is irrelevant with the port form) etc.; It mainly acts on one is topological incidence relation between the reflection system, the 2nd, and the running status of reflection system.
Operational mode (plan): the two-level scheduler center is by coordinating to determine relating dot exchange power between system, this exchange power has been determined performance number (P, Q) in the equivalent port model trend information, higher level control centre only can carry out trend according to exchange power between native system and external system and calculate, determine and external system relating dot voltage, thereby form complete equivalent port model trend information (P, Q, U), as the constraints of subordinate's control centre's operational mode.The subordinate control centre can carry out tidal current analysis to linchpin system of institute according to equivalent port model trend information, there is not authority to revise the set equivalent port model trend information in higher level control centre, have only authority to adjust the local runtime mode, information constrained to satisfy equivalent port model trend.
Multistage multi-region data model combination: in control centre's data model, the corresponding subordinate control centre (subsystem) of equivalent port model possibility or higher level control centre (major network), the control centre can obtain data model from the control centre of the corresponding external system of equivalent port model, be introduced in the local system analysis, if the data model of introducing also is connected with other external systems, then can continue to introduce the other system data model, the data model scale of local system analysis can enlarge gradually like this, until the whole network data model is included wherein.The data model of each control centre all is through tidal current analysis and to satisfy equivalent port model trend information constrained, and the trend after the data model combination distributes preceding consistent with combination.
Data model combination comprises the flow data model, stablizes the combination of data model and equivalent port model, as paired equivalent port appears, these two ports are cancelled out each other to the constraints that system load flow distributes, be converted into a node, by this node, the network model of different system is communicated with; As paired equivalent port model not occurring, directly a plurality of system datas are made up.The combination of a plurality of system data models does not influence each system in and exchanges power between trend distribution and system.
The data model authority is provided with: the subordinate control centre obtains the authority of data model and is set by the higher level control centre from the higher level control centre, for the multi-stage scheduling center, this authority is from top to bottom dwindled step by step.The subordinate control centre can only choose in the extent of competence data model or wherein a part be incorporated into during local system analyzes.
Model changes coping mechanism: model changes when a certain control centre, by this control centre's trigger model change events, notice is used other relevant control centres that this model carries out network analysis, relevant control centre responds this incident, stop to use this model and carry out network analysis, the line data model modification of going forward side by side.Change if this variation causes local system topology or trend to distribute, then can influence subordinate control centre equivalent port model trend information, after the subordinate control centre adjusted operational mode, other relevant control centres carried out data model again and upgrade; Do not distribute if this variation can not change local system topology or trend, other relevant control centres directly carry out data model and upgrade.
The invention has the beneficial effects as follows: the data model of multistage multi-region interconnected network is set up with maintenance work and is become the dispersion collaboration mode by task division of labor pattern, be convenient to keep same device model parameter synchronous, help improving the maintenance levels of electric network data model in total system one the whole network operational mode work of making peace; The setting of data model authority provides network analysis data model basis for different managers with the multistage multi-region data model combination in the protection system data; to satisfy the requirement that different control centres carry out network analysis, help promoting the comprehensive raising of total system analysis level.Be particularly useful for the establishment that electromagnetic looped network unlinks, burst moves the electric power system data model, shared and maintaining method.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Fig. 1 electric power system layering and zoning management schematic diagram
Fig. 2 economizes adjusting system and analyzes corresponding system data model schematic diagram
Fig. 3 net is economized ground dispatching patcher schematic diagram, and wherein 3 (a) are that net is economized the ground system schematic, and 3 (b) are that net is economized the control centre, ground and concerned schematic diagram
Fig. 4 net is economized ground dispatching patcher hardware platform and is implemented configuration diagram
Ground dispatching patcher authority setting of Fig. 5 net province and data model access authority schematic diagram wherein 5 (a) are data model access authority settings between dispatching patcher, and 5 (b) are provided with each corresponding control centre's authority with access rights
Fig. 6 economizes and transfers A and ground to transfer that relating dot equivalence port model is provided with schematic diagram between A1
Each control centre's data model schematic diagram of Fig. 7
Relating dot exchange power setting schematic diagram between Fig. 8 system
Fig. 9 net transfers the I trend to calculate definite relating dot voltage schematic diagram between province of netting
Relating dot voltage schematic diagram between Figure 10 economizes and transfers with transferring the definite province of A trend calculating
Figure 11 economize accent, adjusting data model combination schematic diagram, wherein 11 (a) economize and transfer A and ground to transfer the A1 data model combination; 11 (b) economize and transfer B and ground to transfer the B1 data model combination.
Embodiment
Realize hardware and the communication support platform of the cooperation of multi-stage scheduling center by computer and network, set up the software work environment, for system as shown in Figure 3, its hardware platform enforcement framework as shown in Figure 4.Concrete implementation step is:
(1) system initialization
(1) each grade control centre is provided with the keeper respectively, and the control centre is registration step by step from top to bottom, selects its higher level control centre that is subordinate to when registration, and choosing " nothing " is not confirmed by the keeper of upper level control centre.
(2) keeper of higher level control centre requires and the system analysis model demand according to data model access, and the authority of the visit higher level of subordinate control centre and other control centre's data models is set.The higher level control centre has the authority of visit subordinate control centre's data model, and the subordinate control centre can only have the part of higher level control centre data model access authority; Delineation of power is unit with the control centre, if the A of control centre has access scheduling center B authority, then all data models of the B of control centre are addressable to the A of control centre.The authority setting of system shown in Figure 3 and each control centre are to the access rights of data model as shown in Figure 5.
(3) the operational mode personnel of control centre, various places at different levels registration, the control centre of when registration, selecting it to be subordinate to, the corresponding keeper of control centre confirms, and gives all or part of authority of this control centre's visit data model of accredited personnel and set up data model and the authority of revising data model in this locality.
(2) data model is set up and the mode plan
(1) system manager of higher level control centre, according to the relating dot between this control centre and control centre system of subordinate, which equivalent port model definite needs are provided with, distributing to native system operational mode personnel is provided with, equivalent port model parameter should comprise: port title, two interrelated control centre principal name, relating dot bus title and electric pressure, port form (generator or load type) and parameters thereof, equivalent port model trend information.Equivalent port model trend information (trend power, voltage) is provided with when the operational mode plan, and other parameters are determined according to the electrical network actual conditions, are known.
Such as: in the system shown in Figure 3, the equivalent port model setting between each system is transferred in the I data model at net as shown in Figure 6, and the form of equivalent port A220 and B220 is load; In economizing accent A data model, equivalent port model A220 form is a generator, and the form of equivalent port model A110-1 and A110-2 is load; In economizing accent B data model, equivalent port model B220 form is a generator, and the form of equivalent port model B110-1 and B110-2 is load; Transfer in A1 and the A2 data model on ground, the form of equivalent port model A110-1 and A110-2 is a generator; Transfer in B1 and the B2 data model on ground, the form of equivalent port model B110-1 and B110-2 is a generator.Each equivalent port model trend information is determined in (3).
(2) local system (being the local power grid subsystem) data model is set up, content is the flow data model and the stable data model of local system correspondence, the flow data model comprises grid equipment parameters such as bus, circuit, transformer, and stable data model comprises equipment and control system parameter thereof such as generator, SVC, direct current.Data model can adopt text, form or graphics mode editor, and data model is preserved can adopt text or database form.System shown in Figure 3, the data model of each control centre as shown in Figure 7.Local system is set up by the upper level control centre with the equivalent port model of the system that links to each other, as described in (1).
(3) according to the system operation mode analyze demands, the add-on system operational mode plan of higher level control centre, occur in all subordinate control centres as the mode task, the keeper of control centre of subordinate gives native system operational mode personnel with this Task Distribution, and operational mode personnel are responsible for setting up the local system data model corresponding with this mode.This situation does not need to start from scratch and sets up the system data model, can adjust generator output, load level and each equipment running status on basic mode or data with existing model basis, realizes that local system is to data model that should operational mode.
Operational mode personnel set up in the process or afterwards at data model, coordinate scheduled net interchange between corresponding this locality of this mode and external system with the higher level control centre, after the higher level control centre determined, (P Q) came the plan of constrained system operational mode as the power in the equivalent port model trend information.Between system exchange power by operational mode personnel people for deciding, generally relevant: as to send electric agreement etc. between the electricity needs of each system and balance, system with following factor.Such as system shown in Figure 3, after relating dot exchange power is determined between each control centre as shown in Figure 8: net transfers I to transfer A and economize exchange power between the accent B that (P Q) is defined as (P respectively with economizing
A220, Q
A220) and (P
B220, Q
B220); Economize and transfer A and ground to transfer the exchange power of A1 and A2 to be defined as (P respectively
A110-1, Q
A110-1) and (P
A110-2, Q
A110-2); Economize and transfer B and ground to transfer the exchange power of A1 and A2 to be defined as (P respectively
B110-1, Q
B110-1) and (P
B110-2, Q
B110-2).The positive negative indication power flow direction of exchange power, if to system send electricity on the occasion of, if be subjected to electricity then for negative value from system.
After exchange power is determined between higher level control centre and external system, with external system equivalence on equivalent port model is firm power (P, Q) generator or load, thereby can independently carry out trend calculates, determine each branch road trend in the local system, each node voltage (part that equivalent port model is the system data model as a node), thereby form complete equivalent port model trend information (P, Q, U), as subordinate control centre operational mode constraints, realize each control centre's trend calculating successively step by step downwards, each control centre can independently carry out static security analysis on this basis.
The subordinate control centre is according to equivalent port model trend information (P, Q, U) can carry out trend to local system calculates, the power and the voltage of result of calculation medium value port model position (are P, Q, U) not necessarily in full accord with higher level control centre set point, need to adjust generated output, load level etc. in the local data model, it is information constrained finally to make calculation of tidal current satisfy equivalent port model trend, formulates thereby finish the system operation mode plan.
Such as equivalent port model trend information between each system in the system shown in Figure 3, as Fig. 9 and shown in Figure 10.Net is transferred the I basis and is economized the exchange power (P that transfers A, B
A220, Q
A220), (P
B220, Q
B220), carry out the independent tide flowmeter and calculate back interior each branch road trend of definite local system and each node voltage, also just promptly determined to economize the voltage U of equivalent port model A220, B220 between accent A, B and the net accent I
A220, U
B220Economize to transfer A again according to the trend information (P of equivalent port model A220 then
A220, Q
A220, U
A220) and equivalent port A110-1 and A110-2 power information (P
A110-1, Q
A110-1) and (P
A110-2, Q
A110-2) carry out the calculation of independent tide flowmeter, the trend information of its medium value port model A220 is as the constraints of trend calculating, thus the voltage U of certainty equivalents port A110-1 and A110-2
A110-1And U
A110-2Ground transfers A2 according to equivalent port model A110-1 trend information (P
A220-2, Q
A220-2, U
A110-2) trend of carrying out local system calculates.Economize and transfer B to calculate same province accent A, ground transfers the calculating of A1, B1, B2 to transfer A2 together.
(3) data model combination
(1) data model condition capable of being combined: after the system operation mode plan is formulated, each control centre's data model all is that trend is calculated convergence and satisfied equivalent port model trend information (P, Q, U) retrain, other control centre's data models have the authority visit in the corresponding external system of simultaneously equivalent port model, at specifying operational mode, other control centre's data models can be incorporated into this locality, carry out data model combination.
(2) a plurality of system data models make up the combination that comprises the flow data model, stablizes data model and equivalent port model, as paired equivalent port model appears, these two ports will be cancelled out each other to the constraints that system load flow distributes, and be converted into a node, by this node, the network model of different system is communicated with, and the combination of a plurality of system data models can not influence each system in and exchange power between trend distribution and system.System shown in Figure 3 is economized and is transferred A and ground to transfer the A1 data model combination, economize and transfer B and ground to transfer the B1 data model combination as shown in figure 11.
(4) network analysis
Each control centre of dispatching patcher uses separately, and data model (comprise local flow data, stablize data and equivalent port model data) can carry out calculating of local system trend and relevant static security stability analysis.If carry out transient state or dynamic stability analysis, on local system data model basis, also to introduce the other system data model that is associated,, thereby obtain more accurate result so that in fairly large data model, local system is analyzed by data model combination.The network analysis content comprises: tidal current analysis, static security stability analysis, transient stability analysis, the analysis of transient stability nargin, Transient Stability Control analysis of strategies, microvariations stability analysis etc.
(5) system data model maintenance
System data model maintenance district, control centre is in two kinds of situation: the one, and model changes and can not change the local system trend and distribute, changes as generator and control system parameter thereof, the 2nd, the model variation can change the local system trend and distribute, and changes as line parameter circuit value.
Data model safeguards and is undertaken by each operational mode personnel of control centre that this dispatching patcher keeper confirms that model parameter changes coping mechanism with trigger model after revising and confirming.
If model changes and does not change the distribution of local system trend, then this variation is only influential to transient state or dynamic stability analysis, transfer A generator excitation model to change as economizing in Fig. 3 system, by each control centre that economize to transfer its data model of A notice all references (net transfers I, economize transfer B, transfer A1, transfer A2), these control centres are again from economizing the data model of transferring A to obtain all or only change.
If model changes and to have changed the local system trend and distribute, transfer the A line parameter circuit value to change as economizing in Fig. 3 system, handle this variation to subordinate's dispatching patcher (transfer A1, A2) influence that the mode trend distributes, its treatment step is:
(1) economizes accent A and carry out tidal current analysis according to the updated model parameter;
(2) economize accent A renewal and ground and transfer equivalent port model voltage (U between A1, A2
A110-1, U
A110-2), and A1, A2 are transferred in notice ground;
(3) transfer A1, A2 to carry out tidal current analysis and operational mode adjustment respectively again, it is information constrained to make the trend distribution satisfy up-to-date equivalent port model trend;
(4) economize to transfer the A notice quote the control centre of its data model (net transfers I, economize transfer B, transfer A1, transfer A2) upgrade data model;
(5) transfer A1 notice quote the control centre of its data model (net transfers I, economize transfer A, transfer A2) upgrade data model;
(6) transfer A2 notice quote the control centre of its data model (net transfers I, economize transfer A, transfer A1) upgrade data model.
Claims (5)
1, the construction method of multistage multi-region interconnected network data model, it is characterized in that: whole network system data are divided according to the dispatching of power netwoks administrative area, network system each control centre at different levels sets up data model respectively, if exist related between certain two control centre, then defined the equivalent port model of relating dot between these two control centres by the upper level control centre, the equivalent port model external electrical network system related with each this background network system is corresponding; The system operation mode of electrical network adopts the newspaper plan of next stage control centre, the adjustment of upper level control centre, next stage control centre to revise, and the final collaboration mode of confirming in upper level control centre carries out; The network system operational mode is carried out the multistage multi-region data model combination after determining, for the upper level control centre, can obtain data model from the subordinate control centre, replaces corresponding equivalent port model, realizes major network and subsystem data model combination; For the subordinate control centre, can obtain the external electrical network data model corresponding by the higher level control centre with the equivalent port model of local power grid system relationship, realize subsystem and external electrical network data model combination, so that in big scale of power, the local power grid system is analyzed; And the constraint that the combination of data model is provided with by the data model authority, each control centre can only make up data model in the extent of competence, and data model can not be visited beyond the authority; When the incident that a certain equipment changes in data model, this variation is adopted model to change coping mechanism and handle this incident in the full electric network system;
Described equivalent port model is: if exist between two network systems of different stage, zones of different related, their external systems each other then, in arbitrary control centre, external system embodies with equivalent port model form; Equivalent port model is paired,, must have the opposing party and is subjected to from certain network system as sending electricity to certain network system a side; The system relationship relation of equivalent port model representative is unique; Content comprises: the equivalent port form of port title, two interrelated control centre principal name, tie point bus title and electric pressure, generator or load expressions and equivalent port parameter, voltage, trend is meritorious, the port trend information of idle formation, and numerical value is just being represented to send electricity, numerical value negative indication to be subjected to from local system to local system;
(1) each control centre of multistage power network dispatching system independently sets up data model respectively, by relating dot between the electrical network subsystem is set up equivalent port model, it is the equivalent port model of relating dot between certain two control centre, with inter-related electrical network decoupling zero is a plurality of grid subsystems, and the equivalent port model external electrical network system related with this background network system is corresponding; Equivalent port model is the part in the electric network data model, and its content comprises: port title, two interrelated control centre principal name, tie point bus name and electric pressure, equivalent port form (generator or load) and equivalent port parameters, port trend information (P, Q, U);
(2) each control centre can use local power grid system data model and equivalent port model trend information and carries out trend and calculate and the steady stability safety analysis, network system operational mode (plan) is determined the exchange power between interrelated electrical network subsystem, higher level control centre carries out trend according to exchange power between local power grid system and external electrical network system and calculates, determine and external electrical network system relationship point voltage, thereby form complete equivalent port model trend information (P, Q, U), constraints as subordinate's control centre's trend calculating, realize each control centre's trend calculating successively downwards step by step, each control centre can independently carry out static security analysis on this basis;
(3) data model between the network system control centre as seen, can obtain other control centres of this control centre's direct correlation by the equivalent port model that the control centre is defined, the data model of these direct correlation control centres is visible for this control centre; Can obtain other control centres of indirect association by other control centre's data model medium value port model, the data model of the control centre of these indirect associations also is visible for this control centre; The data model content comprises flow data (network equipment parameters such as bus, circuit, transformer), stablizes data (equipment and control system parameter such as generator, SVC, direct current) and the equivalent port data of model;
(4) data model with other control centres is incorporated into local and the combination of local power grid system data model, in fairly large system, the local power grid system is carried out transient state or dynamic stability safety analysis, data model combination comprises the flow data model, stablize the combination of data model and equivalent port model, as paired equivalent port appears, these two ports are cancelled out each other to the constraints that system load flow distributes, be converted into a node, by this node, the data model of different system is communicated with, as paired equivalent port model not occurring, directly a plurality of system data models are made up, the combination of a plurality of system data models does not influence each system in and exchanges power between trend distribution and system.
2, require the construction method of 1 described multistage multi-region interconnected network data model according to letter of authorization, it is characterized in that changing when a certain control centre model, change coping mechanism by model and in total system, handle this variation, keep the consistency of system data model at the whole network; Change the control centre by model and trigger this incident, other relevant control centres respond, and two kinds of situations are arranged:
(1) model changes and does not change the system load flow distribution, this situation, and relevant control centre directly upgrades the native system data model;
(2) model changes and has changed the distribution of local system trend, this situation, at first handle the influence that subordinate's control centre's trend is distributed, automatically revise with the subordinate control centre between the corresponding equivalent port model trend information of relating dot, and notice subordinate control centre carries out tidal current analysis and operational mode adjustment again, it is information constrained to make its system load flow distribution satisfy up-to-date equivalent port model trend, local system and subordinate's dispatching patcher are notified the control centre that quotes its data model afterwards, obtain data model again.
3, require the construction method of 1 described multistage multi-region interconnected network data model according to letter of authorization, the step that it is characterized in that operational mode is: the two-level scheduler center is by coordinating to determine relating dot exchange power between system, this exchange power has been determined performance number (P in the equivalent port model trend information, Q), higher level control centre only can carry out trend according to exchange power between native system and external system and calculate, determine and external system relating dot voltage, thereby form complete equivalent port model trend information (P, Q, U), as the constraints of subordinate's control centre's operational mode; The subordinate control centre can carry out tidal current analysis to linchpin system of institute according to equivalent port model trend information, there is not authority to revise the set equivalent port model trend information in higher level control centre, have only authority to adjust the local runtime mode, information constrained to satisfy equivalent port model trend.
4, require the construction method of 1 described multistage multi-region interconnected network data model according to letter of authorization, it is characterized in that multistage multi-region data model combination step is: in control centre's data model, corresponding subordinate control centre of equivalent port model possibility or higher level control centre, the control centre can obtain data model from the control centre of the corresponding external system of equivalent port model, be introduced in the local system analysis, if the data model of introducing also is connected with other external systems, then can continue to introduce the other system data model, until the whole network data model is included wherein; The data model of each control centre all is through tidal current analysis and to satisfy equivalent port model trend information constrained, and the trend after the data model combination distributes preceding consistent with combination; Data model combination comprises the flow data model, stablizes the combination of data model and equivalent port model, as paired equivalent port appears, these two ports are cancelled out each other to the constraints that system load flow distributes, be converted into a node, by this node, the network model of different system is communicated with; As paired equivalent port model not occurring, directly a plurality of system datas are made up.
5, require the construction method of 1 described multistage multi-region interconnected network data model according to letter of authorization, it is characterized in that the setting of data model authority: the subordinate control centre obtains the authority of data model and is set by the higher level control centre from the higher level control centre, for the multi-stage scheduling center, this authority is from top to bottom dwindled step by step.The subordinate control centre can only choose in the extent of competence data model or wherein a part be incorporated into during local system analyzes.
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