Electric Power ›› 2025, Vol. 58 ›› Issue (7): 128-136.DOI: 10.11930/j.issn.1004-9649.202409057

• New-Type Power Grid • Previous Articles     Next Articles

A Power Grid Fault Diagnosis Method of Online Monitoring System for Relay Protection under Multiple Dimensionality Reduction

CAO Haiou1(), HU Xiaoli2(), DAI Wei1(), HU Jiatong2(), LI Ping3(), ZHANG Yue4()   

  1. 1. State Grid Jiangsu Electric Power Co., Ltd., Nanjing 210000, China
    2. Skills Training Center of State Grid Jiangsu Electric Power Co., Ltd., Suzhou 215004, China
    3. State Grid Jiangsu Electric Power Co., Ltd. Huai'an Power Supply Branch, Huaian 223000, China
    4. State Grid Jiangsu Electric Power Co., Ltd. Nanjing Power Supply Branch, Nanjing 210000, China
  • Received:2024-09-12 Online:2025-07-30 Published:2025-07-28
  • Supported by:
    This work is supported by National Natural Science Foundation of China (No.52307109).

Abstract:

With the continuous expansion of the power grid, the amount of fault information data is increasing, and the traditional diagnosis scheme is facing the challenge of dimension disaster fault tolerance is also facing challenges. Based on this, a fault diagnosis method for power grid under the condition of multi-level dimension reduction is proposed. Firstly, the power grid dimension diagnosis model considering information modification is constructed, and further dimension reduction is carried out based on the topological structure; then the improved coati optimization algorithm (COA) is used to optimize fault diagnosis model, and the fault auxiliary judgment is carried out by introducing the online monitoring system of relay protection; Finally, the test results of different positioning methods under different optimization algorithms compared, and it is verified that the proposed method has a good positioning effect and convergence speed.

Key words: fault diagnosis, information correction, dimensionality reduction