Electric Power ›› 2024, Vol. 57 ›› Issue (5): 188-199.DOI: 10.11930/j.issn.1004-9649.202307027

• Power System • Previous Articles     Next Articles

Fault Location Method for Distribution Network with Photovoltaic Power Based on Negative Sequence Component

Manlin HU1(), Nan LI2(), Yiming LI1(), Zhiyong PI2, Yi ZHU1, Zhenxing LI1()   

  1. 1. College of Electrical Engineering and New Energy, Three Gorges University, Yichang 443002, China
    2. State Grid Hubei Jingmen Electric Power Supply Company, Jingmen 448001, China
  • Received:2023-07-10 Accepted:2023-10-08 Online:2024-05-23 Published:2024-05-28
  • Supported by:
    This work is supported by National Natural Science Foundation of China (Research on Major Risk Analysis and Control Strategy by Reclosing for Large-Scale Power Transmission Channel, No.52077120)

Abstract:

In order to solve the problem that the fault current can not correctly indicate the fault section due to the connection of photovoltaic power to the distribution network, the three-sequence component of the faulty distribution network with photovoltaic power generation is analyzed, and the negative sequence component is selected as the fault characteristic quantity. A negative sequence reconstruction scheme is proposed for the asymmetric fault scenario. The MK trend detection is used to search the negative-sequence reconstruction sequence with the most obvious fault characteristics. The negative sequence reconstruction voltage amplitude is used to determine the suspicious fault section, and the fault section is finally determined by the phase direction of negative sequence reconstruction current. A distribution network model with photovoltaic power generation is established with the PSCAD/EMTDC simulation platform. The results show that the proposed method can accurately locate the fault section of the distribution network with photovoltaic power generation under different fault types and fault locations, and can provide a theoretical basis for the rapid fault location of the distribution network with photovoltaic power generation.

Key words: symmetrical component method, fault location, negative sequence reconstruction, MK detection, photovoltaic power generation