CN101877500B - Interconnected power system oriented hierachical decomposition space-time cooperative modeling method - Google Patents

Interconnected power system oriented hierachical decomposition space-time cooperative modeling method Download PDF

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CN101877500B
CN101877500B CN200910083325.XA CN200910083325A CN101877500B CN 101877500 B CN101877500 B CN 101877500B CN 200910083325 A CN200910083325 A CN 200910083325A CN 101877500 B CN101877500 B CN 101877500B
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version
information
file
management service
combination
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CN200910083325.XA
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CN101877500A (en
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米为民
钱静
李立新
尚学伟
周京阳
沈国辉
徐家慧
潘毅
高保成
徐丹丹
边晓宇
于耀中
何江
吴艳华
卓俊峰
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北京科东电力控制系统有限责任公司
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Abstract

The invention discloses an interconnected power system oriented hierachical decomposition space-time cooperative modeling method. The method is based on IEC61970 standard, E-format standard, version management service, model combination/separation, external network equivalence, SVG graph transformation, E-format data import/export and other technologies, a standard information exchange mechanism is established between different levels of scheduling systems, a standard public information processing mechanism is established on a scheduling system platform, and the space-time cooperative modeling system of interconnected power systems is realized. The invention can solve the contradiction between the modeling modes of the interconnected large power grid and the traditional power grid, solve information integration and sharing among various application systems and among various scheduling systems in the scheduling center and provide data basis and technical support for the real-time monitoring, control and online security analysis of the interconnected large power system.

Description

Towards the hierachical decomposition space-time cooperative modeling method of interconnected electric power system
Technical field
The present invention relates to a kind of modeling method for power network dispatching system, relate in particular to a kind of towards interconnected electric power system, the modeling method that realizes power network dispatching systems at different levels coordinating and unifying on the tense of space by technology such as space-time cooperative version management service, model fractionation/merging, dynamic equivalents, belongs to power system dispatching automation technique field.
Background technology
Electric power system is the complex large system of a United Dispatching being made up of power plant, transformer station, transmission and distribution networks and user and operation.In electric power system, need to corresponding dispatching patcher be set at links and different levels, to guarantee the safe and stable operation of electrical network.Along with the formation of national interconnected power grid, electrical network scale is increasing, and the association between interconnected network is closer, and electric network composition and operational mode are day by day complicated, brings huge challenge to safe and stable operation and supervision, the analysis and control of electrical network.
The power network dispatching system of China adopts the pattern of hierarchical monitoring, lacks the information sharing mechanism of specification between dispatching patchers at different levels.Each dispatching patcher can only be to the electric network model Accurate Model in its dispatching management scope, and external electrical network adopts non-Accurate Model or simple equivalent processing, and this traditional modeling pattern can not meet the demand for development of interconnected power grid.
The modeling of interconnected electric power system hierachical decomposition space-time cooperative refers to that dispatching patchers at different levels only need the electric network model (Intranet) of maintenance schedule scope, between dispatching patcher by technology such as information exchange, model fractionation/merging, dynamic equivalents, realize dispatching patchers at different levels coordinating and unifying modeling on the tense of space, wherein " time " be the tense of electric network model, tense comprises historical state, in real time state and following state (claiming again planning state), " sky " refers to interconnected by spatially of electrical networks at different levels, realizes the information sharings of different scheduling.
Current, widely used IEC61970 standard provides technical specification for power scheduling information standardization.Domestic main dispatching patcher platform has all been followed IEC61970 standard, support to use common information model (Common Information Model, referred to as CIM) description electric network composition, support CIMXML file (the CIM model file representing with XML form, be called for short CIM file) importing and derivation, support can spread vector figure (Scalable Vector Graphics, SVG) test pattern importing/derivation.In addition, the E format specification (hereinafter referred to as E file) that control centre of State Grid Corporation of China formulates, is also widely used as operation of power networks concurrentization.Model fractionation/folding based on CIM file, online external network equivalent technology and the integrated information version management service of figure (SVG file) number (E file) mould (CIM file) technology etc. are risen gradually, for the hierachical decomposition space-time cooperative modeling method of interconnected electric power system provides theoretic basis.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of hierachical decomposition space-time cooperative modeling method towards interconnected electric power system.The method, by technology such as space-time cooperative version management service, model fractionation/merging, dynamic equivalents, has realized the modeling of power network dispatching systems at different levels coordinating and unifying on the tense of space
For realizing above-mentioned object, the present invention adopts following technical scheme:
Towards a hierachical decomposition space-time cooperative modeling method for interconnected electric power system, it is characterized in that:
(1) external network equivalent model that version management service reception higher level dispatching patcher sends, the electric network model version information of the each dispatching patcher of reception subordinate, figure, number, the mould information of reception local scheduling system;
(2), from version management service acquisition external network equivalent model, local model and model boundary definition, generate the result of 1+1 model combination;
(3) from the electric network model of the each dispatching patcher of version management service acquisition subordinate, local model and model boundary definition, or the electric network model of the each dispatching patcher of result/subordinate of the 1+1 model combination that obtaining step (2) obtains and model boundary definition, the result of generation 1+n model combination;
(4), from the result of version management service acquisition 1+n model combination and corresponding model boundary definition, generate the external network equivalent model of the each dispatching patcher of subordinate;
(5) version information that version management service sends local power grid model is to higher level's dispatching patcher, send the version information of external network equivalent model to subordinate's dispatching patcher, electric network model, SVG graphic file and E formatted file after transmission merges are to local scheduling system;
(6) electric network model of the electric network model of external network equivalent model, local scheduling system and subordinate's dispatching patcher is merged into the whole network model with CIM representation of file.
Utilize interconnected electric power system hierachical decomposition space-time cooperative modeling method provided by the present invention, can solve the contradiction between interconnected power grid and traditional power network modeling mode, the information between the each application system in control centre and between dispatching patcher at different levels that solves is integrated and shared problem, for real time monitoring, control, the safety on line analysis of interconnected power grid provide data basis and technical support.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the building-block of logic of the hierachical decomposition space-time cooperative modeling method towards interconnected electric power system provided by the present invention;
Fig. 2 is the schematic diagram that version management service and upper and lower level dispatching patcher are carried out information exchange;
Fig. 3 is the illustrative view of functional configuration of version management service;
Fig. 4 is in version management service, the schematic flow sheet of information checking;
Fig. 5 is the version management service catalogue schematic diagram using in version management service;
Fig. 6 is the electric network model schematic diagram of historical state, in real time state and planning state.
Embodiment
Before specifically introducing hierachical decomposition space-time cooperative modeling method provided by the present invention, first some concepts that use in the present invention are made an explanation.
In power network dispatching system, an EMS (EMS) electric power system model can be converted and export as an XML document.This document is called CIM XML model file, for the electric network model information exchange between system, referred to as CIM file.Between different power network dispatching systems, realize figures exchange between system by SVG graphic file.SVG graphic file comprises plant stand figure and tidal current chart etc., referred to as SVG file.In addition, between different power network dispatching systems, carry out the exchange of electrical network real-time running data by E formatted file.The E format specification that this E formatted file is worked out based on State Grid Corporation of China, referred to as E file.Taking CIM file as main, correspondence is called version information with the information aggregate of the compositions such as SVG graphic file and E formatted file.In the present invention, the reference format of exchange using CIM file as electric network model, the reference format of exchange using E file as real time data, the reference format using SVG file as figures exchange.
Based on the model combination of CIM file, refer to by a series of technological means such as CIM document analysis, model scheduling border fractionation, model splicings, each model is effectively synthesized, form complete the whole network model.And according to certain rule, as given voltage grade, one group of plant stand or one group of particular device (circuit, transformer, switch etc.), the whole network model is reduced, form a little electric network model.This operation is called model and splits.In electric power system, model combination/disassemble technique is relatively ripe technology.Electric network model merging method based on this technology is repeatedly applied in real system, and obtains good effect.
In grid dispatching center inside, the information sharing between each application system and between dispatching patcher comprises electric network model information, electrical network real-time running data (abbreviation real time data), graphical information (being called for short figure, number, the integrated information sharing of mould).Between dispatching patcher, carry out information exchange taking version as unit, a common version is except comprising figure, number, mould information, also comprise Description of ××× (Release name) file, contour description file (longitudinally version) etc., Description of ××× (Release name) file is the text of XML form, record the rise time of this version, the filename comprising, tense (historical state, state in real time, following state).The principle that version is set up is: (1) each file grammer is correct, and inclusion information meets specification; (2) version is taking CIM file as main, and the file of other form must be consistent with model file.
Figure 1 shows that the building-block of logic of the hierachical decomposition space-time cooperative modeling method towards interconnected electric power system provided by the present invention.Higher level's dispatching patcher is connected by network with subordinate dispatching patcher, and exchange correlation data, as CIM file, E file and SVG file etc.Based on the entrained data of these files, the service operations that the present invention serves taking version management is as core, above, subordinate's dispatching patcher and local scheduling system are data source, the instrument that is Data Integration by the technology such as model combination, external network equivalent, the result after integration by version management delivery of services to the superior and the subordinate's dispatching patcher and local scheduling system.In the specific implementation, can be taking this hierachical decomposition space-time cooperative modeling method as a modeling of basis establishment.This modeling and local scheduling system platform be the relation of loose coupling, interface is simple, mainly mutual with file, SQL, the mode such as self-defined.Concrete this modeling of establishment is that those of ordinary skill in the art utilize conventional computer literacy to realize easily, has not just been described in detail at this.
In the present invention, realization figure, number, the integrated space-time cooperative version management of mould service are the core procedures of whole method.The effect of this step is to provide common data management service, is responsible for the reception/transmission, storage, management of data etc., thereby realizes version exchanging mechanism, version verification and the version information management etc. of specification.
As shown in Figure 2, version management service comprises server end and the two-part content of client.Wherein client deployment is in upper and lower level dispatching patcher, and major function comprises: upload information, Download Info, subscriptions of E formatted file, information exchange Log Browser, model boundary and define and revise/browse etc.Server end is deployed in local scheduling system.Rely on data dispatching net, client end/server end, server end/server end form the version information exchanging mechanism of normality between dispatching patcher jointly, the communication modes such as ftp, Web Service, CORBA/CIS are supported in version information exchange, client can active upload information, and server end also can active obtaining information.Higher level's dispatching patcher is that the information content that subordinate's dispatching patcher sends comprises: the version information of (1) the whole network; (2) version information of external network equivalent.Subordinate's dispatching patcher is the version information that higher level's dispatching patcher sends local scheduling system.
As shown in Figure 3, the operation of the three aspects :s such as receive/transmission service that version management service can be divided into version, version information validate service (abbreviation information checking) and version information management service (abbreviation information management), describes respectively below.
Version receives/sends the version information that service sends for receiving client, trigger message verification automatically.Information checking flow process shown in Figure 4, if information checking is correct, enters information management, and log information, sends daily record to client, and system prompt server end user has fresh information; If information checking is made mistakes, generation error file, the reason of makeing mistakes of recorded information, log simultaneously, sends daily record to client, and client can be downloaded wrong file.
The object of information checking is correctness and the consistency of guarantee information, for following model merging, external network equivalent etc. provide correct data source.The content of information checking mainly comprises: the grammaticality of each file; The correctness such as the border of CIM file, network topology, parameter; The consistency of consistency, E formatted file and the CIM file of SVG file and CIM file etc.The content of verification can configure as required voluntarily.The data that receive/transmission of version service is obtained from client all will be passed through information checking link, confirm the errorless rear information management link of just carrying out.
Information management comprises that information storage, version generate, version is issued, version incremental raio, the operation such as old version inquiry, series interfaces.It passes through model combination interface and external network equivalent interface is accepted the data from model combination operation and external network equivalent operation, and data are inputted to version reception/transmission service.
As shown in Figure 5, the version in the present invention manages in the mode of file directory.Version is divided into horizontal version and longitudinal version, and laterally version refers to figure, the number of local scheduling system, the version of mould Information generation.Longitudinally version is that model combination is carried out the version that finishes rear automatic generation, and release content comprises: CIM file, SVG graphic file, E formatted file, Description of ××× (Release name) file and boundary definition file etc. that the CIM file of all participation model combinations and model combination generate.Information management is divided into five large storage directories: up-to-date information catalogue, and longitudinally version, laterally version, old version unloading, version is issued.Version receives/sends the information that service reception arrives, enter latest document catalogue through information checking, the figure that local scheduling system sends, number, mould information also enters latest document catalogue, laterally the release directory is deposited this map, number, the version that mould information forms, longitudinally the release directory is deposited the version (comprising the version that external network equivalent+local model combination forms) that model combination forms, old version unloading is stored in the version packing of section sometime under this catalogue, record the index information of this bag simultaneously, for version querying, it is public directory that version is issued catalogue, indicated release is published to this catalogue, for third party's system.
Introduce the model combination/disassemble technique adopting in the present invention below.Model combination/disassemble technique is to realize the very important ring of hierachical decomposition space-time cooperative modeling.It is by a series of technological means such as CIM document analysis, model scheduling border fractionation, model splicings, and each model is effectively synthesized, and forms complete the whole network model.Model combination/disassemble technique combines the technology such as the importing/derivation of CIM file, the importing/derivation of SVG figure, the importing/derivation of E form, for realizing the supervision of interconnected large the whole network overall situation, control and on-line analysis, provides Information base.
Model combination is divided into two classes: the large-sized model that the CIM file of (1) local CIM file+some subordinates dispatching patcher forms the whole network (is called for short 1+n model combination, wherein n is natural number), provide data basis for realizing interconnected power grid safety analysis.(2) the CIM file+external network equivalent model of local scheduling system (higher level's dispatching patcher provides) forms the rational local power grid model of outer net modeling (being called for short 1+1 model combination), is used for improving the computational accuracy of local security analysis classes software.Merge in conjunction with two class models, finally complete the power network modeling of " the CIM file of CIM file+some subordinates dispatching patcher of external network equivalent model+this dispatching patcher ".
In the paper " application of the electric network model merging method based on CIM XML in State Grid Corporation of China's dispatching patcher " delivered inventor (be loaded in " electric power network technique " 2008 the 10th phase of 32 volumes 33~37 pages), introduce the electric network model merging method based on CIM file.This electric network model merging method mainly comprises the technology such as CIM parsing, model fractionation, model splicing, result derivation and longitudinal redaction generation, model combination based on CIM file is a complicated process, a large amount of work is the processing to model file, the efficiency that solves file process in enormous quantities is one of key technology of model combination, for this reason, must be according to the feature of CIM file, adopt shared drive high speed index technology, the special resolver of exploitation CIM file.It is exactly according to scheduling boundary information that model splits, and utilizes topological relation, dismisses each model peripheral model information (comprising the measurement information of external model), reserving model internal information and boundary information.Model combination couples together each model after splitting by edge device, thereby logically forms the complete model of a full electric network.The model of splicing can be derived CIM file or direct import system database as required.After completing model combination, longitudinal version be can generate, generation and the issue of redaction are responsible for by version management service.About further illustrating of model combination/disassemble technique, can, with reference to the detailed introduction in above-mentioned paper, just not repeat at this.
Next, introduce the external network equivalent technology adopting in the present invention.In conventional external network equivalent model, buffering net Equivalent Model is best external network equivalent modeling pattern, but this external network equivalent modeling pattern needs accurately to understand the real time information of outer net.In the present invention, by the technology such as merging that first use a model, higher level's dispatching patcher can be grasped operational mode and the running status of the peripheral electrical network of subordinate's dispatching patcher exactly, can be in real time for subordinate's dispatching patcher calculates the external network equivalent model with buffering net.Subordinate's dispatching patcher is utilized external network equivalent model, can carry out the online merging of intranet and extranet model, forms the electric network model that comprises buffering plant stand and equivalent plant stand, thereby, improve the computational accuracy of dispatching patcher application software with reasonable manner more.What buffering was netted has chosen two kinds of modes: (1) calculates buffering plant stand by distribution factor method; (2) basis and Intranet electrical distance distance, buffering plant stand can be divided into first-level buffer plant stand, level 2 buffering plant stand etc., and dispatching patcher can be according to the actual conditions of outer net, optionally accomplish what buffering plant stand.
External network equivalent information comprises: external network equivalent model (CIM file), the SVG graphic file of buffering plant stand, the E formatted file of corresponding external network equivalent model.External network equivalent model has two kinds of forms: (1) subordinate's dispatching patcher border plant stand+buffering plant stand+dynamic equivalent data; (2) subordinate's dispatching patcher model+buffering plant stand+dynamic equivalent data.The external network equivalent model of the first form sends to after subordinate's dispatching patcher, and necessary and local model combination, could use, and the external network equivalent model of the second form can directly import local system and use, and two kinds of forms can choice for use.
The generative process of external network equivalent model is: (1) electric network model based on subordinate's dispatching patcher, will cushion plant stand as inner plant stand, and calculate external network equivalent information; (2) model based on large-sized model file splits, and splits out border plant stand and the buffering plant stand of subordinate's electric network model; (3) model split result and the external network equivalent information calculating are merged, form external network equivalent model.External network equivalent information sends to subordinate's dispatching patcher in real time, if model itself does not change, only sends E form real time data, otherwise sends whole external network equivalent information.
E file is the reference format that real time data exchange is carried out in the electric power system including the present invention, and E document transfer mode has two kinds: (1) cycle transmits; (2) file calling.Cycle transmission is conventional transmission means, and file calling is supplementary means.E file designation mode is: area-name _ markers .QS, wherein, markers is accurate to second, as NC_20090221101000.QS, represents the North China all data file in 10: 10: 0 on the 21st February in 2009.Synchronous for the real time data that ensures each region to transmit specifies: (1) E file is just dividing the moment to generate, and permissible error must not exceed 2 seconds in modeling method, when E file after target two between 00 to 02; (2) the transmission cycle consistent, the transmission cycle is in a minute level; (3) history file (for calling) of certain hour will be preserved in each region.Like this, the present invention, according to the markers of file, forms the data section of the whole network, the real time data that ensures each region is synchronous, if find that certain region do not mate E file, enables file calling mechanism, if file calling failure again, selects the E file nearest apart from this moment.
This hierachical decomposition space-time cooperative modeling method, centered by version management service, carries out the inflow/outflow of information.The processing procedure of data flow mainly comprises three parts: the external network equivalent information that (1) version management service reception higher level dispatching patcher sends, receive the electric network model version information of the each dispatching patcher of subordinate, receive figure, number, the mould information (at the local version of the inner formation of version management service) of local scheduling system.(2) model combination link, from version management service acquisition external network equivalent model+local model+boundary definition, is returned to the result of corresponding 1+1 model combination; Model combination link, from electric network model+local model+model boundary definition of the each dispatching patcher of version management service acquisition subordinate or electric network model+model boundary definition of the each dispatching patcher of 1+1 model combination result+subordinate, is returned to 1+n model combination result; External network equivalent link, from version management service acquisition 1+n model combination result and corresponding boundary definition, is returned to the external network equivalent model of the each dispatching patcher of subordinate.(3) version information that version management service sends local power grid model is to higher level's dispatching patcher, send the version information of external network equivalent model to subordinate's dispatching patcher, the E formatted file of the SVG graphic file+correspondence of the various electric network model+correspondences after transmission merges is to local scheduling system; The E formatted file of the SVG graphic file+correspondence of transmission 1+1 model combination result+correspondence is to local scheduling system.
At present, domestic dispatching patchers at different levels have substantially all realized the unified of real-time model and following model and have safeguarded, on real-time model basis, set up the following electric network model that does not affect scheduling real time execution.Between each dispatching patcher, not only require real-time model to share, and require history, following model all will share.Space-time cooperative modeling is exactly the shared and integration of the history that realizes dispatching patchers at different levels, real-time, following model, figure, data, coordinates mutually unified Modeling on space, tense.
For this reason, in the present invention, set up respectively the whole network model of historical state, in real time state and planning state, to meet the demand of each application system.Historical states model is transformed by real-time states model, and planning states model is merged and formed by planning states model corresponding to dispatching patchers at different levels, and planning states model can convert real-time state to.As shown in Figure 6, the E formatted file of the SVG graphic file+correspondence in electric network model+corresponding version, has just formed the data source of dispatching patcher, for the each application system in inside, control centre provides the model, figure and the part real time data that need.In practice, can split the model in Fig. 6 according to the requirement of different application systems, split out the electric network model that each application system needs.It is the routine techniques that persons skilled in the art can be grasped that this model splits, and has not just repeated at this.
The process of hierachical decomposition space-time cooperative modeling that the present invention realizes interconnected electric power system is as follows: the electric network model of electric network model+subordinate dispatching patcher of (1) external network equivalent model+local scheduling system is merged into the whole network model (CIM file) as shown in Figure 6; (2), according to the needs of inside, control centre different application systems, to the whole network CIM file declustering, form the electric network model of different application systems; (3) local scheduling system is utilized importing/derivation instrument of existing CIM file, and SVG figure crossover tool and import/derivation of E formatted file instrument import local scheduling system relevant informations such as figure, number, moulds.
This hierachical decomposition space-time cooperative modeling method organically blends the technology that imports and exports of version management service technology, model combination/disassemble technique, SVG graphic conversion technology, model file, online external network equivalent technology etc., utilize version management service technology, between dispatching patchers at different levels, form the integrated information exchange mechanism of figure, number, mould of specification, set up integrated public information center, realize space-time cooperative modeling, realize interconnected power grid information sharing.
Above the hierachical decomposition space-time cooperative modeling method towards interconnected electric power system provided by the present invention is had been described in detail.For one of ordinary skill in the art, any apparent change of under the prerequisite that does not deviate from connotation of the present invention, it being done, all will form infringement of patent right of the present invention, will bear corresponding legal liabilities.

Claims (1)

1. towards a hierachical decomposition space-time cooperative modeling method for interconnected electric power system, it is characterized in that:
(1) version information of the external network equivalent model that version management service reception higher level dispatching patcher sends, the electric network model version information of the each dispatching patcher of reception subordinate, figure, number, the mould information of reception local scheduling system;
(2), from version management service acquisition external network equivalent model and corresponding boundary definition, the mould information of local scheduling system and the boundary definition of correspondence thereof thereof, generate the result of 1+1 model combination;
(3), from electric network model and each self-corresponding boundary definition, the mould information of local scheduling system and the boundary definition of correspondence thereof of the each dispatching patcher of version management service acquisition subordinate, generate the result of 1+n model combination; Or,
The result of the 1+1 model combination obtaining from version management service acquisition step (2), electric network model and each self-corresponding boundary definition of the each dispatching patcher of subordinate, the result of generation l+n model combination;
(4), from result and the corresponding boundary definition of version management service acquisition l+n model combination, generate the external network equivalent model of the each dispatching patcher of subordinate;
(5) the mould information that version management service sends local scheduling system is to higher level's dispatching patcher, the version information of the external network equivalent model generating in forwarding step (4) is to subordinate's dispatching patcher, and the electric network model after transmission merges, the E formatted file forming for the E format specification that represents the SVG graphic file of different power network dispatching system figures exchange and formulate based on State Grid Corporation of China are to local scheduling system;
(6) external network equivalent model, the electric network model of local scheduling system and the electric network model of subordinate's dispatching patcher that in step (4), generate are merged into the whole network model with the XML representation of file of CIM model;
Described version management service comprises server end and client two parts, and wherein client deployment is in upper and lower level dispatching patcher, and server end is deployed in local scheduling system;
Described version management service comprises that version receives/send service, version information validate service and three links of version information management service; Wherein,
Version receives/sends the version information that service sends for receiving client, and automatically triggers version information validate service;
Version information validate service is for correctness and the consistency of guarantee information, for model combination, external network equivalent provide correct data source;
Version information management service is used for realizing information storage, version generation, version issue, version incremental raio and old version inquiry; This version information management service passes through model combination interface and external network equivalent interface is accepted the data from model combination operation and external network equivalent operation, and transfers data to described version reception/transmission service.
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