CN101877500A - 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 PDFInfo
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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
Technical field
The present invention relates to a kind of modeling method that is used for power network dispatching system, relate in particular to a kind of towards interconnected electric power system, realize the modeling method of power network dispatching systems at different levels coordinating and unifying on the tense of space belonging to the power system dispatching automation technique field by technology such as space-time cooperative version management service, model fractionation/merging, dynamic equivalents.
Background technology
Electric power system is a unified complex large system of dispatching and moving of being made up of power plant, transformer station, transmission and distribution networks and user.In electric power system, need corresponding dispatching patcher be set in each link and different levels, to guarantee the safe and stable operation of electrical network.Along with the formation of the interconnected big electrical network in the whole nation, scale of power is increasing, and the association between the interconnected network is closer, and electric network composition and operational mode are complicated day by day, brings great challenge for safe and stable operation and supervision, analysis and the control of electrical network.
The power network dispatching system of China adopts the pattern of hierarchical monitoring, lacks the information sharing mechanism of standard between the dispatching patchers at different levels.Each dispatching patcher can only be to the accurate modeling of the electric network model in its dispatching management scope, and external electrical network then adopts non-accurate modeling or simple equivalent the processing, and this traditional modeling pattern can not satisfy the demand for development of interconnected big electrical network.
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 the 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 attitude, real-time attitude and following attitude (claiming the planning attitude again), " sky " refers to electrical networks at different levels interconnected by spatially, realizes the information sharings of different scheduling.
Current, widely used IEC61970 standard provides technical specification for the power scheduling information standardization.Domestic main dispatching patcher platform has all been followed the IEC61970 standard, support to use common information model (Common Information Model, abbreviate CIM as) the description electric network composition, support CIMXML file (the CIM model file of representing with the XML form, abbreviation CIM file) importing and derivation, but support spread vector figure (Scalable Vector Graphics, SVG) importing/derivation of test pattern.In addition, the E format specification (to call the E file in the following text) that the State Grid Corporation of China control centre formulates also is widely used as operation of power networks exchanges data standard.Rise gradually based on the model fractionation/folding of CIM file, online external network equivalent technology and the incorporate information version management service of figure (SVG file) number (E file) moulds (CIM file) technology etc., 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.This method has realized the modeling of 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
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
A kind of hierachical decomposition space-time cooperative modeling method towards interconnected electric power system is characterized in that:
(1) the version management service receives the external network equivalent model that higher level's dispatching patcher sends, and receives the electric network model version information of each dispatching patcher of subordinate, receives figure, number, the mould information of local scheduling system;
(2) obtain external network equivalent model, local model and model boundary definition from the version management service, generate the result that the 1+1 model merges;
(3) obtain the electric network model of each dispatching patcher of subordinate, local model and model boundary definition from the version management service, perhaps the electric network model of each dispatching patcher of result/subordinate of the 1+1 model merging of obtaining step (2) acquisition and model boundary definition generate the result that the 1+n model merges;
(4) obtain the result of 1+n model merging and corresponding model boundary definition from the version management service, generate the external network equivalent model of each dispatching patcher of subordinate;
(5) version information of version management service transmission local power grid model is to higher level's dispatching patcher, and the version information that sends external network equivalent model is to subordinate's dispatching patcher, and electric network model, SVG graphic file and E formatted file after transmission merges are to the 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 the 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 big electrical network and the traditional electrical network modeling pattern, solve between each application system of control centre and information integrated and the problem of sharing between the dispatching patchers at different levels, for real time monitoring, control, the safety on line analysis of interconnected big electrical network provides data basis and technical support.
Description of drawings
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
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 version management service and the upper and lower grade of schematic diagram that dispatching patcher is carried out information exchange;
Fig. 3 is the illustrative view of functional configuration of version management service;
Fig. 4 is in the version management service, the schematic flow sheet of information checking;
The version management service catalogue schematic diagram of Fig. 5 for using in the version management service;
Fig. 6 is the electric network model schematic diagram of historical attitude, real-time attitude and planning attitude.
Embodiment
Before specifically introducing hierachical decomposition space-time cooperative modeling method provided by the present invention, at first more employed notions among 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, is used for the electric network model information exchange between system, abbreviates the CIM file as.Between different power network dispatching systems, by figures exchange between SVG graphic file realization system.The SVG graphic file comprises station figure of factory and tidal current chart etc., abbreviates the SVG file as.In addition, carry out the exchange of real-time power network service data by the E formatted file between the different power network dispatching systems.This E formatted file abbreviates the E file as based on the E format specification that State Grid Corporation of China works out.Based on the CIM file, corresponding ensemble of communication with compositions such as SVG graphic file and E formatted files is called version information.In the present invention, with the reference format of CIM file, with the reference format of E file, with the reference format of SVG file as figures exchange as the real time data exchange as the electric network model exchange.
Merge based on the model of CIM file, be meant, each model is carried out effectively synthetic, form complete the whole network model by a series of technological means such as CIM document analysis, model scheduling border fractionation, model splicings.And according to certain rule, stand or one group of particular device (circuit, transformer, switch etc.) as given voltage grade, one group of factory, the whole network model is reduced, form a little electric network model.This operation is called model and splits.In electric power system, model merging/disassemble technique is relatively than mature technique.Electric network model merging method based on this technology is repeatedly used in real system, and obtains good effect.
In grid dispatching center inside, between each application system and the information sharing between the dispatching patcher comprise electric network model information, real-time power network service data (abbreviation real time data), graphical information (being called for short figure, number, the incorporate information sharing of mould).Be that unit carries out information exchange with the version between the dispatching patcher, a common version is except comprising figure, number, mould information, also comprise Description of file, border description document (vertically version) etc., the Description of file is the text of XML form, write down the rise time of this version, the filename that comprises, tense (historical attitude, real-time attitude, following attitude).The principle that version is set up is: (1) each file grammer is correct, comprises the information conforms standard; (2) version is based on the CIM file, 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 the subordinate dispatching patcher, and the exchange correlation data are as CIM file, E file and SVG file etc.Based on the entrained data of these files, the present invention is a core with the service operations of version management service, more than, subordinate's dispatching patcher and local scheduling system be data source, with technology such as model merging, external network equivalents is the instrument that data are integrated, and the result after the integration gives the superior and the subordinate's dispatching patcher and local scheduling system by the version management delivery of services.In the specific implementation, can serve as modeling of basis establishment with this hierachical decomposition space-time cooperative modeling method.This modeling and local scheduling system platform be the relation of loose coupling, interface is simple, and is mainly mutual with file, SQL, mode such as self-defined.Concrete this modeling of establishment is that those of ordinary skills utilize conventional computer literacy to realize easily, has not just given unnecessary details in detail at this.
In the present invention, realization figure, number, the incorporate space-time cooperative version management service of mould are the core procedures of entire method.The effect of this step is to provide the common data management service, the reception/transmission of responsible data, storage, management etc., thereby version exchanging mechanism, version verification and the version information management etc. of realization standard.
As shown in Figure 2, the 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 that information, download message, E formatted file are subscribed to, the information exchange daily record is browsed, the model boundary definition is revised/browsed etc.Server end is deployed in the local scheduling system.Rely on the data dispatching net, client end/server end, server end/server end form the version information exchanging mechanism of normality between the dispatching patcher jointly, ftp, communication modes such as Web Service, CORBA/CIS are supported in the version information exchange, client can active upload information, and server end also can initiatively obtain information.Higher level's dispatching patcher comprises for the information content that subordinate's dispatching patcher sends: the version information of (1) the whole network; (2) version information of external network equivalent.Subordinate's dispatching patcher sends the version information of local scheduling system for higher level's dispatching patcher.
As shown in Figure 3, the version management service can be divided into the operation of version reception/transmission service, version information verification service (abbreviation information checking) and version information management service three aspects such as (abbreviation information managements), describes respectively below.
Version reception/transmission service is used to receive the version information that client sends, trigger message verification automatically.Referring to information checking flow process shown in Figure 4, if information checking is correct, then enter information management, and log information, sending daily record to client, system prompt server end user has fresh information; If information checking is made mistakes, generation error file then, the reason of makeing mistakes of recorded information, log sends daily record to client simultaneously, and client can be downloaded wrong file.
The purpose of information checking is the 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; Correctness such as the border of CIM file, network topology, parameter; The consistency of the consistency of SVG file and CIM file, E formatted file and CIM file etc.The content of verification can dispose as required voluntarily.The data that version reception/transmission service is obtained from client all will be passed through the information checking link, confirm just to carry out the information management link after errorless.
Information management comprises that information stores, version generate, version issue, version incremental raio, operations such as old version inquiry, series interfaces.It merges interface by model and the external network equivalent interface accepts the data of self model union operation and external network equivalent operation, and data is imported version reception/transmission serve.
As shown in Figure 5, the version among the present invention manages in the mode of file directory.Version is divided into horizontal version and vertical version, and laterally version is meant the version that figure, number, the mould information of local scheduling system generate.Vertically version is that model merges the version that generates automatically after execution finishes, and release content comprises: CIM file, SVG graphic file, E formatted file, Description of file and boundary definition file etc. that the CIM file that all participation models merge and models merging generate.Information management is divided into five big storage directories: up-to-date information catalogue, vertical version, horizontal version, old version unloading, version issue.The information that version reception/transmission service receives, enter the latest document catalogue through information checking, the figure that the local scheduling system sends, number, mould information also enters the latest document catalogue, laterally the release directory is deposited this map, number, the version that mould information forms, vertically the release directory is deposited the version (comprising that external network equivalent+local model merges the version that forms) that model merges formation, the old version unloading is stored in the version packing of section sometime under this catalogue, write down the index information of this bag simultaneously, for version querying, version issue catalogue is a public directory, indicated release is published to this catalogue, uses for the third party system.
Model merging/the disassemble technique of introducing among the present invention below to be adopted.Model merging/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, each model is carried out effectively synthetic, forms complete the whole network model.Model merging/disassemble technique combines 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 big the whole network overall situation, control and on-line analysis, provides the information basis.
Model merges and is divided into two classes: the CIM file of (1) local CIM file+some subordinates dispatching patcher forms the large-sized model (be called for short the 1+n model and merge, wherein n is a natural number) of the whole network, provides the data basis for realizing interconnected big power grid security 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 the 1+1 model merges), is used for improving the computational accuracy of local security analysis classes software.Merge in conjunction with two class models, finally finish the electrical network modeling of " the CIM file of the CIM file of external network equivalent model+this dispatching patcher+some subordinates dispatching patcher ".
In the paper " based on the application of electric network model merging method in State Grid Corporation of China's dispatching patcher of CIM XML " (be stated from " electric power network technique " rolled up 33～37 pages of the 10th phases in 2008 32) that the inventor delivers, introduced electric network model merging method based on the CIM file.This electric network model merging method mainly comprises technology such as CIM parsing, model fractionation, model splicing, result's derivation and vertical redaction generation, model merging based on the CIM file is the process of a complexity, 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 merging, for this reason, must adopt shared drive high speed index technology according to the characteristics of CIM file, the special-purpose resolver of exploitation CIM file.It is exactly according to the scheduling boundary information that model splits, and utilizes topological relation, dismisses outside model information in each model (measurement information that comprises external model), reserving model internal information and boundary information.Each model that model will merge after will splitting couples together 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.Finish to generate vertical version after model merges, be responsible for the generation and the issue of redaction by the version management service.About further specifying of model merging/disassemble technique, can just not give unnecessary details at this with reference to the detailed introduction in the above-mentioned paper.
Next, the external network equivalent technology of introducing among the present invention to be adopted.In external network equivalent model commonly used, 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 technology such as the merging that at first uses a model, higher level's dispatching patcher can be grasped the operational mode and the running status of the peripheral electrical network of subordinate's dispatching patcher exactly, can calculate the external network equivalent model that has the buffering net for subordinate's dispatching patcher in real time.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 comprise buffering factory station and equivalent factory station, thereby, with the computational accuracy of reasonable manner raising dispatching patcher application software more.Cushion the dual mode of having chosen of net: (1) calculates buffering factory station with the distribution factor method; (2) according to and Intranet electrical distance distance, buffering factory station can be divided into first-level buffer factory station, level 2 buffering factory station etc., what buffering factory station is dispatching patcher can optionally accomplish according to the actual conditions of outer net.
External network equivalent information comprises: external network equivalent model (CIM file), the SVG graphic file at buffering factory station, the E formatted file of corresponding external network equivalent model.External network equivalent model has two kinds of forms: dispatching patcher border station+buffering factory of factory of (1) subordinate station+dynamic equivalent data; (2) subordinate's dispatching patcher model+buffering factory station+dynamic equivalent data.After the external network equivalent model of first kind of form sends to subordinate's dispatching patcher, must merge with local model, could use, the external network equivalent model of second kind of form can directly import local system and use, and two kinds of forms can be selected to use.
The generative process of external network equivalent model is: (1) will cushion the factory station as inner factory station based on the electric network model of subordinate's dispatching patcher, calculate external network equivalent information; (2) model based on the large-sized model file splits, and splits out the border factory station and the buffering factory station of subordinate's electric network model; (3) model split result and the external network equivalent information that calculates 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.
The E file is that the reference format that real time data exchanges is carried out in the electric power system that comprises the present invention, and the E document transfer mode has two kinds: (1) cycle transmits; (2) file calling.It is conventional transmission means that cycle transmits, and the file calling is a 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.For guarantee the real time data that transmits in each zone synchronously, stipulate in modeling method: (1) E file generates just dividing constantly, and permissible error must not surpass 2 seconds, promptly during the E file after the target two between 00 to 02; (2) transmission cycle unanimity, the transmission cycle is in a minute level; (3) history file (for calling) of certain hour will be preserved in each zone.Like this, the present invention forms the data section of the whole network according to the markers of file, guarantee that each regional real time data is synchronous, do not mate the E file, then enable file calling mechanism if find certain zone, if file calling failure is once more then selected apart from nearest E file of this moment.
This hierachical decomposition space-time cooperative modeling method is the center with the version management service, carries out the inflow/outflow of information.The processing procedure of data flow mainly comprises three parts: (1) version management service receives the external network equivalent information that higher level's dispatching patcher sends, receive the electric network model version information of 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 merging link is obtained external network equivalent model+local model+boundary definition from the version management service, returns the result that corresponding 1+1 model merges; Model merges link and obtains the electric network model+local model+model boundary definition of each dispatching patcher of subordinate or the electric network model+model boundary definition of each dispatching patcher of 1+1 model amalgamation result+subordinate from the version management service, returns 1+n model amalgamation result; The external network equivalent link is obtained 1+n model amalgamation result and corresponding boundary definition from the version management service, returns the external network equivalent model of each dispatching patcher of subordinate.(3) the version management service sends the version information of local power grid model to higher level's dispatching patcher, the version information that sends external network equivalent model is to subordinate's dispatching patcher, and the E formatted file of the SVG graphic file+correspondence of the various electric network models+correspondence after transmission merges is to the local scheduling system; The E formatted file of the SVG graphic file+correspondence of transmission 1+1 model amalgamation result+correspondence is to the local scheduling system.
At present, domestic dispatching patchers at different levels have all realized the unified maintenance of real-time model and following model basically, promptly set up the following electric network model that does not influence the scheduling real time execution on the real-time model basis.Not only require real-time model to share between each dispatching patcher, and require history, following model all will share.The 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 unified Modeling on space, tense mutually.
For this reason, set up the whole network model of historical attitude, real-time attitude and planning attitude among the present invention respectively, to satisfy the demand of each application system.Historical states model is transformed by real-time states model, and the planning states model is formed by the planning states model merging of dispatching patcher correspondences at different levels, and the planning states model can convert real-time attitude 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, and model, figure and the part real time data that needs is provided for each application system of inside, control centre.In practice, can the model among Fig. 6 be split, split out the electric network model that each application system needs according to the requirement of different application systems.It is the routine techniques that persons skilled in the art can both be grasped that this model splits, and has not just given unnecessary details at this.
The present invention realizes that the process of hierachical decomposition space-time cooperative modeling of interconnected electric power system is as follows: the electric network model of the electric network model of (1) external network equivalent model+local scheduling system+subordinate's dispatching patcher 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, the whole network CIM file is split, form the electric network model of different application systems; (3) the local scheduling system utilizes the importing/derivation instrument of existing C IM file, and SVG figure crossover tool and E formatted file importing/derivation instrument import the local scheduling system to 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 merging/disassemble technique, SVG graphic conversion technology, model file, online external network equivalent technology etc., utilize the version management service technology, between dispatching patchers at different levels, form the incorporate information exchange mechanism of figure, number, mould of standard, set up incorporate public information center, realize the space-time cooperative modeling, realize that interconnected big electric network information is shared.
More than 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 conspicuous change of under the prerequisite that does not deviate from connotation of the present invention it being done all will constitute to infringement of patent right of the present invention, with corresponding legal responsibilities.
Claims (3)
1. hierachical decomposition space-time cooperative modeling method towards interconnected electric power system is characterized in that:
(1) the version management service receives the external network equivalent model that higher level's dispatching patcher sends, and receives the electric network model version information of each dispatching patcher of subordinate, receives figure, number, the mould information of local scheduling system;
(2) obtain external network equivalent model, local model and model boundary definition from the version management service, generate the result that the 1+1 model merges;
(3) obtain the electric network model of each dispatching patcher of subordinate, local model and model boundary definition from the version management service, perhaps the electric network model of each dispatching patcher of result/subordinate of the 1+1 model merging of obtaining step (2) acquisition and model boundary definition generate the result that the 1+n model merges;
(4) obtain the result of 1+n model merging and corresponding model boundary definition from the version management service, generate the external network equivalent model of each dispatching patcher of subordinate;
(5) version information of version management service transmission local power grid model is to higher level's dispatching patcher, and the version information that sends external network equivalent model is to subordinate's dispatching patcher, and electric network model, SVG graphic file and E formatted file after transmission merges are to the 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 the CIM representation of file.
2. hierachical decomposition space-time cooperative modeling method as claimed in claim 1 is characterized in that:
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 the local scheduling system.
3. hierachical decomposition space-time cooperative modeling method as claimed in claim 1 is characterized in that:
Described version management service comprises version reception/transmission service, version information verification service and three links of version information management service; Wherein,
Version reception/transmission service is used to receive the version information that client sends, and triggers version information verification service automatically;
Version information verification service is used for the correctness and the consistency of guarantee information, for model merges, external network equivalent provides correct data source;
The version information management service is used to realize that information stores, version generate, version issue, version incremental raio and the old version inquiry.
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