Power grid operation mode recognition method and system based on electric parameter state estimation

Abstract

The invention discloses a power grid operation mode recognition method and system based on electric parameter state estimation. Firstly, a power grid primary system wiring mode and a topological structure and real-time primary system electrical parameters are obtained, and state estimation is carried out on the electrical parameters, so that bad data can be detected and removed; then the electrical parameter characteristic values of the power grid under different operation modes are obtained through the state assumption of a switch, a rich power grid operation mode knowledge base is formed, and based on the electric parameters after state estimation, the operation mode characteristic values in the knowledge base and the actual operation mode measurement values are matched by means of matching and identifying through a least square method, so that identification of the operation mode is realized. The real-time electrical parameters of the power grid are utilized, bad data identificationand elimination are carried out on the electrical parameters, and the reliability and accuracy of recognition are effectively improved; and the power grid operation mode knowledge base is established, so that effective and comprehensive data support is provided for accurate recognition of the power grid operation mode, and the recognition efficiency is improved.

Description

technical field [0001] The invention relates to the field of electric power system detection, and more specifically, to a method for identifying an operating mode of a power grid based on state estimation of electrical parameters and a system thereof. Background technique [0002] At present, the grid operation mode identification method based on the matrix model obtains the local topological information of each node of the grid and the relationship between nodes, with the help of a specific dynamic topology self-identification mechanism and each state criterion, from the initial information of a single node Gradually identify the topological relationship of each node in the entire line and even the entire regional grid, thereby identifying the operation mode of the power grid. The reliability and effectiveness of the identification depend on the comprehensiveness and accuracy of the topology information. In addition, the identification mechanism and The reliability of each ...

AI Technical Summary

Problems solved by technology

[0003] However, the existing technology has the following shortcomings. First, it does not make full use of the real-time electrical parameter information measured by the power grid. The electrical parameter information refers to electrical information such as voltage and current of the power grid, and the huge node topology information lacks the identification and identification of bad information. The error verification, the reliability and accuracy of identification have not yet met the requirements of power grid operation reliability

Secondly, every time the operation mode of the power grid changes, complex matrix calculations and verification of the basis for discrimination are required to complete the identification of the operation mode. There is no knowledge base and the identification efficiency is low.

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