Power network topology error identification method based on mixed state estimation

A state estimation and topology error technology, applied to AC network circuits, electrical components, circuit devices, etc., can solve the problems of reducing the accuracy of topology error identification and ignoring the amount of information

Inactive Publication Date: 2006-02-22
TSINGHUA UNIV
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Problems solved by technology

In the mathematical model for this solution, only the contribution of telemetry to the objective function of state estimation is considered, while the amount of information contained in telemetry is ignored, which reduces the accuracy of topology error identification

Method used

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  • Power network topology error identification method based on mixed state estimation
  • Power network topology error identification method based on mixed state estimation
  • Power network topology error identification method based on mixed state estimation

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specific Embodiment

[0077] A kind of specific embodiment of above-mentioned steps is as follows:

[0078] Using the remote signal collected by EMS, according to the opening and closing state of the switch, first conduct a power grid topology analysis (a mature network analysis technology) to determine each branch in the power grid (including: transmission lines, transformers, generators, Load and other branches) are in the state of commissioning. Then, compare whether the commissioning status of each branch corresponds to its power flow telemetry. If not, it is judged as a suspicious branch. There are two basic rules for judging: (1) if the branch is not in operation, and If the power flow is not zero, it is a suspicious branch; (2) If the branch is put into operation, but the branch flow is zero, it is a suspicious branch. Finally, search along the suspicious branch, find out the remote signaling of the suspicious switch on the branch, and obtain the set of suspicious switches.

[0079] In ord...

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Abstract

The invention relates to electrical network topological error identification method based on mixed evaluation, belonging to the network topological error identification technique of evaluating the condition of electrical system. Said method comprises: detection: checking the correspondence between each branch switch telemetry and branch current measurement, attaining relative suspected switch integration when they are not corresponding; evaluation and identification: using the topological structure corresponded to the suspected switch integration to form a possible correct topological structure integration, utilizing mixed evaluation method to find a network topological structure which can make the remote measurement and telemetry total information be damaged least, as a correct topological from said possible topological structure integration; correcting the switch telemetry: correcting the fault telemetry according to said correct topological structure. The invention can integrated take regard of network topological information of remote measurement and telemetry, to improve the accuracy of topological error identification.

Description

technical field [0001] The invention belongs to the technical field of network topology error identification (network topology error identification) in power system state estimation (state estimation). Background technique [0002] Energy management system (Energy management system, abbreviated as EMS) is a computer-based dispatch automation system for modern power systems, and its task is to collect, monitor, analyze, optimize and control decisions in real time for power systems. Power system state estimation is the foundation and core link of EMS. It utilizes the real-time measurement information collected from the power system, eliminates wrong information, estimates a complete, consistent and credible real-time state of the power system, and ensures the correctness of EMS control decisions . [0003] The real-time measurement information collected by EMS includes two parts: telemetry and remote signaling. Telemetry refers to the collected analog quantities (such as curr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J13/00
Inventor 孙宏斌张伯明吴文传高峰
Owner TSINGHUA UNIV
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