A Method of Switch State Estimation in Smart Substation Based on Uncertainty Reasoning
A smart substation and switch status technology, applied in computing, electrical digital data processing, special data processing applications, etc., can solve problems such as unresolved switch status, network topology errors in the dispatch center, and affecting the correctness of the state estimation results of the dispatch center. Achieve fast and reliable switch state estimation, improve accuracy, and solve adverse effects
Active Publication Date: 2016-12-07
NARI TECH CO LTD +1
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Although the frequency of switch state errors is much lower than that of the bad measurement data sent, it cannot rule out the switch state errors caused by unexpected failures, interference, channel failures, etc., and switch state errors will directly lead to scheduling The error of the network topology of the center seriously affects the correctness of the state estimation results of the dispatch center
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[0034] The technical solution of the present invention will be further elaborated below according to the accompanying drawings, including the architecture, reasoning knowledge and estimation process of the switch state estimation.
[0035] 1. Switch state estimation architecture
[0036] The architecture of the system is as figure 1 As shown, it is mainly composed of five parts: panorama database, management process, data processing dynamic library, shared memory and reasoning engine. The management process extracts the required data from the substation panorama database by calling the data processing dynamic library, creates a shared memory block and establishes an intelligent substation equipment model, equipment real-time measurement table, equipment real-time status information table and reasoning knowledge base, and performs data maintenance; reasoning The machine accesses various data tables in the shared memory by calling the data processing dynamic library, and perfor...
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The invention relates to an intelligent substation switch state estimation method based on uncertainty reasoning and belongs to the field of intelligent substation automation. The intelligent substation switch state estimation method includes: building a device model sheet, a real-time state information sheet and a measuring information sheet required by switch state estimation on the basis of an intelligent substation full-view database, building a reasoning knowledge base, and building various switch state reasoning knowledge using a switch device as an object; calculating comprehensive reliability of the state of each switch according to a transmitting algorithm and a compounding algorithm of uncertainty reasoning to obtain the correct states of the switches. By means of the intelligent substation switch state estimation method, fast and reliable switch state estimation on the basis of an uncertainty reasoning method can be achieved, and when a switch state is wrong, an accurate switch state can be fed to a scheduling master station, so that bad influence on master station operation control caused by wrong switch states can be improved, and accuracy of power grid dispatching basic data can be improved.
Description
technical field [0001] The invention relates to a method for estimating the switch state of an intelligent substation, which belongs to the field of automation of the intelligent substation. Background technique [0002] Power system state estimation is the core application to solve the accuracy of the basic data of the power grid, and it is also the basis for the correct operation and control of the power grid. The existing network topology model for dispatching state estimation is based on the switch state data sent from the substation. Although the frequency of switch state errors is much lower than that of the bad measurement data sent, it cannot rule out the switch state errors caused by unexpected failures, interference, channel failures, etc., and switch state errors will directly lead to scheduling The error of the network topology of the center will seriously affect the correctness of the state estimation results of the dispatch center. Therefore, only by identify...
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IPC IPC(8): G06F19/00
Inventor 张海滨翟明玉齐苗苗张婷梁锋
Owner NARI TECH CO LTD