CN109412153A - Grid operation mode recognition methods and its system based on electric parameter state estimation - Google Patents
Grid operation mode recognition methods and its system based on electric parameter state estimation Download PDFInfo
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- CN109412153A CN109412153A CN201811332385.6A CN201811332385A CN109412153A CN 109412153 A CN109412153 A CN 109412153A CN 201811332385 A CN201811332385 A CN 201811332385A CN 109412153 A CN109412153 A CN 109412153A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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Abstract
The invention discloses a kind of grid operation mode recognition methods and its system based on electric parameter state estimation.The power grid primary system mode of connection and topological structure and real-time primary system electric parameter are obtained first, and state estimation is carried out to electric parameter, complete the detection and rejecting of bad data, then assume to obtain the power grid electric parameter characteristic value under different running method by the state of switch, form grid operation mode knowledge base abundant, and utilize the electric parameter after state estimation, pass through the method for least square method matching identification, to the method for operation characteristic value and the matching of actual operating measured value in knowledge base, the identification of the method for operation is realized.The present invention utilizes the real-time electric parameter of power grid, bad data identification and rejecting are carried out to electric parameter, effectively increase the reliability and accuracy of identification, by establishing grid operation mode knowledge base, effective and comprehensive data supporting is provided for accurately identifying for grid operation mode, improves the efficiency of identification.
Description
Technical field
The present invention relates to electric system detection fields, more particularly, to a kind of electricity based on electric parameter state estimation
The recognition methods of the net method of operation and its system.
Background technique
Grid operation mode recognition methods based on matrix model at this stage is opened up by obtaining the part of each node of power grid
The correlation between information and node is flutterred, by means of specific dynamic topology self-identifying mechanism and each state criterion, from list
The initial information of node gradually identifies the topological connection relationship of each node in whole route or even whole region rack, thus
Identify that the method for operation of power grid, the reliability and validity of identification depend on the comprehensive and accuracy of topology information, in addition,
The reliability of recognition mechanism and each state criterion also will affect the accuracy of identification.
However the prior art haves the shortcomings that following, is not made full use of first to the real-time electric parameter of power grid measurement letter
Breath, electric parameter information refers to the electric informations such as the voltage of power grid, electric current, and huge node topology poor information is bad
The identification of information and the verification of error, the reliability and accuracy rate of identification not yet meet the requirement of operation of power networks reliability.Secondly,
When changing of grid operation mode each time will carry out the verification of complicated matrix calculating and distinguishing rule, could be complete
At the identification of the method for operation, knowledge base, the low efficiency of identification are not formed.
Summary of the invention
The present invention in order to overcome at least one of the drawbacks of the prior art described above, is provided one kind and is estimated based on electric parameter state
The grid operation mode recognition methods of meter and its system.
The present invention is directed to solve above-mentioned technical problem at least to a certain extent.
In order to solve the above technical problems, technical scheme is as follows: a kind of electricity based on electric parameter state estimation
Net method of operation recognition methods, comprising the following steps:
S1: electrical network parameter information, the physical message including the power grid primary system mode of connection and network topology structure are obtained
And the electric parameter of primary system；
S2: electricity grid network topology knot is constructed according to the physical message of the power grid primary system mode of connection and network topology structure
Structure model generates raw data set according to the electric parameter of power grid primary system；
S3: assuming that in electricity grid network topological structure each switch state, calculate each method of operation of power grid under it is electrical
Parameter attribute value, and electric parameter characteristic value is carried out to save the base module for forming each method of operation of power grid；To raw data
The detection and rejecting for concentrating bad data, form ripe data set；
S4: using least square method by the characteristic value and power grid of the power grid electric parameter of the various methods of operation of base module
The ripe data set of real time execution carries out matching primitives, that is, select which electric parameter characteristic value and real time execution ripe data it
Between difference it is minimum and this feature is worth the method for operation that corresponding grid operation mode is the ripe data of the real-time row.
The present invention, which passes through, obtains the power grid primary system mode of connection and topological structure and real-time primary system electric parameter,
And state estimation is carried out to electric parameter, the detection and rejecting of bad data are completed, carries out grid operation mode on this basis
Identification.The identification of grid operation mode: on the basis of the primary system mode of connection and topological structure of power grid, pass through switch
State assume obtain different running method under power grid electric parameter characteristic value, form grid operation mode knowledge abundant
Library.Then, using the electric parameter after state estimation, by the method for least square method matching identification, to method of operation knowledge
Method of operation characteristic value and actual operating the measured value matching stored in library, and error analysis is carried out, it is final to realize fortune
The identification of line mode.
Preferably, the method for operation includes that switching, artificial Loop Closing Operation, emergency stop valve trip, the prepared auto restart of new energy are dynamic
Make.
Preferably, the electric parameter includes electric current and information of voltage.
Preferably, the characteristic value includes the operation ginseng of each node voltage and each line current in network topology structure
Numerical value.
Preferably, using least square method by the characteristic value of the power grid electric parameter of the various methods of operation of base module with
The ripe data set of power grid real time execution carries out the process of matching primitives are as follows:
If ripe data set of the measured value of primary system electric parameter after state estimation is Z=[z1, z2 ..., zn]；
In method of operation knowledge base, corresponding electric parameter characteristic value is X=[x1, x2 ..., xn]；
Using least square method, global error is calculated, and keeps global error value minimum:
Wherein, n indicates the shared n kind method of operation, and z indicates that the electric parameter of real time operation mode, x indicate the method for operation pair
The electric parameter answered, 0 < i < n, 0 < j < n.
A kind of grid operation mode identifying system based on electric parameter state estimation, including configuration parameter acquisition module,
Electric parameter acquisition module, state estimation module, base module and method of operation characteristic matching module；
The configuration parameter obtains module and is used to obtain the primary system mode of connection of power grid and the object of network topology structure
Information is managed, and obtains the feature of the power grid electric parameter under different running method by the switch state in network topology structure
Value；
The power grid that the base module is used to store under the different method of operation and different running method is electrically joined
The characteristic value of amount；
Electric parameter acquisition module is for acquiring the real-time electric parameter of power grid, the life number including the formation of voltage and current data
According to collection, raw data set is the data acquisition system without the actual acquisition of Bad data processing；
State estimation module carries out state estimation for receiving raw data set, completes to bad data in raw data set
Detection and rejecting, form ripe data set, that is, reject the life data set of bad data；
Method of operation characteristic matching module is used for according to the power grid electric parameters of the methods of operation various in base module
The ripe data set of characteristic value and power grid real time execution carries out matching primitives and determines immediate operation side using least square method
Formula, to realize that the method for operation identifies.
Compared with prior art, the beneficial effect of technical solution of the present invention is: the present invention is by topological structure of electric, sufficiently
Bad data identification and rejecting are carried out using the real-time electric parameter of power grid, and to electric parameter, effectively increase identification can
By property and accuracy, in addition, forming power grid abundant by the corresponding relationship of in-depth grid operation mode and method of operation feature
Method of operation knowledge base provides effective and comprehensive data supporting for accurately identifying for grid operation mode, improves identification
Efficiency.
Detailed description of the invention
Fig. 1 is that the present invention is based on the grid operation mode identification process figures of electric parameter state estimation.
Fig. 2 is that the present invention is based on the system diagrams that the grid operation mode of electric parameter state estimation identifies.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
The following further describes the technical solution of the present invention with reference to the accompanying drawings and examples.
Embodiment 1
Grid operation mode identification process figure based on electric parameter state estimation as shown in Figure 1, step include:
S1: electric network information, including configuration parameter and the real-time electric parameter of primary system are obtained；Configuration parameter is power grid one
The physical message of the subsystem mode of connection and network topology structure, and electric parameter information is the electric current and electricity of primary system in real time
Press information.
S2: building method of operation base module, on the basis of obtaining grid configuration parameter, by network topology figure
The state of difference switch is it is assumed that and carry out the corresponding fortune such as each node voltage and each line current of Load flow calculation acquisition to power grid
Row characteristic value, records and stores, and forms grid operation mode knowledge base.
In the specific implementation process, it is assumed that there are n node in network, p branch, the feasible method of operation of m kind is then transported
All methods of operation method of operation characteristic value corresponding with every kind of method of operation is stored in line mode knowledge base, wherein the method for operation
Characteristic value is all node voltages, all line currents in network, as shown in table 1:
S3: state estimation is carried out to electric parameter, passes through the practical electric parameter of the primary system collected, including each section
The measured value of point voltage and each line current, is the life data without state estimation, may contain bad data, influence to transport
The identification of line mode, it is therefore desirable to pass through state estimation, i.e. being recognized and being rejected to bad data, formation is able to reflect electricity
The ripe data set of Running State.
S4: matching the method for operation, realizes the identification of the method for operation, it is assumed that the measured value of primary system electric parameter
Ripe data set after state estimation is Z=[z1,z2,…,zn]；In method of operation knowledge base, corresponding electric parameter is special
Value indicative is X=[x1,x2,…,xn]；Using least square method, global error is calculated, and keeps global error value minimum:
All method of operation characteristic values of grid operation mode knowledge base are compared, the smallest fortune of global error is found out
Line mode characteristic value, and using the corresponding method of operation of this characteristic value as the method for operation of power grid.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (6)
1. a kind of grid operation mode recognition methods based on electric parameter state estimation, which comprises the following steps:
S1: obtaining electrical network parameter information, physical message including the power grid primary system mode of connection and network topology structure and
The electric parameter of real-time electric parameter information, that is, primary system；
S2: electricity grid network topological structure mould is constructed according to the physical message of the power grid primary system mode of connection and network topology structure
Type generates raw data set according to the electric parameter of power grid primary system；
S3: assuming that in electricity grid network topological structure each switch state, calculate each method of operation of power grid under electric parameter
Characteristic value, and electric parameter characteristic value is carried out to save the base module for forming each method of operation of power grid；To in raw data set
The detection and rejecting of bad data, form ripe data set；
S4: using least square method that the characteristic value of the power grid electric parameter of the various methods of operation of base module and power grid is real-time
The ripe data set of operation carries out matching primitives, that is, it is poor between the characteristic value of which electric parameter and the ripe data of real time execution to select
Value is minimum and this feature is worth the method for operation that corresponding grid operation mode is the ripe data of the real-time row.
2. a kind of grid operation mode recognition methods based on electric parameter state estimation according to claim 1, special
Sign is: the method for operation includes the switching, artificial Loop Closing Operation, emergency stop valve trip, prepared auto restart movement of new energy.
3. a kind of grid operation mode recognition methods based on electric parameter state estimation according to claim 1, special
Sign is: the electric parameter includes electric current and information of voltage.
4. a kind of grid operation mode recognition methods based on electric parameter state estimation according to claim 1, special
Sign is: the characteristic value includes the operational parameter value of each node voltage and each line current in network topology structure.
5. a kind of grid operation mode recognition methods based on electric parameter state estimation according to claim 1, special
Sign is: using least square method that the characteristic value of the power grid electric parameter of the various methods of operation of base module and power grid is real-time
The ripe data set of operation carries out the process of matching primitives are as follows:
If ripe data set of the measured value of primary system electric parameter after state estimation is Z=[z1,z2,…,zn]；
In method of operation knowledge base, corresponding electric parameter characteristic value is X=[x1,x2,…,xn]；
Using least square method, global error is calculated, and keeps global error value minimum:
Wherein, n indicates the shared n kind method of operation, and z indicates that the electric parameter of real time operation mode, x indicate that the method for operation is corresponding
Electric parameter, 0 < i < n, 0 < j < n.
6. a kind of grid operation mode identifying system based on electric parameter state estimation, which is characterized in that including configuration parameter
Obtain module, electric parameter acquisition module, state estimation module, base module and method of operation characteristic matching module；
The configuration parameter obtains module and is used to obtain the primary system mode of connection of power grid and the physics letter of network topology structure
Breath, and pass through the characteristic value of the power grid electric parameter under the switch state acquisition different running method in network topology structure；
The base module is used to store the power grid electric parameter under the different method of operation and different running method
Characteristic value；
Electric parameter acquisition module is for acquiring the real-time electric parameter of power grid, the life data including the formation of voltage and current data
Collection, raw data set are the data acquisition systems without the actual acquisition of Bad data processing；
State estimation module carries out state estimation for receiving raw data set, completes the inspection to bad data in raw data set
It surveys and rejects, form ripe data set, that is, reject the life data set of bad data；
Method of operation characteristic matching module is used for the feature of the power grid electric parameter according to the methods of operation various in base module
The ripe data set of value and power grid real time execution carries out matching primitives and determines the immediate method of operation using least square method, from
And it realizes the method for operation and identifies.
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Application publication date: 20190301 |