Open AccessAccurate fault location of complex distribution network with distributed generators
Author(s) -
Li Weijian,
Guo Chuangxin,
Jin Yu,
Gong Xiao
Publication year - 2017
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2017.0661
Subject(s) - fault (geology) , node (physics) , voltage sag , power (physics) , voltage , computer science , electrical impedance , impedance parameters , point (geometry) , equivalent impedance transforms , fault indicator , distributed generation , reliability engineering , control theory (sociology) , fault detection and isolation , engineering , electrical engineering , mathematics , power quality , physics , structural engineering , geology , geometry , control (management) , quantum mechanics , artificial intelligence , seismology , actuator
For the complex distribution network with lots of branches and distributed power supply, a fault location method based on voltage sag information is proposed. First, the equivalent model is established for the distributed power source. Then the fault current vector is obtained by using the node impedance matrix and the voltage vector recorded by the distributed power supply access point before and during the fault. Finally, the faulted node is determined by comparing fault current deviation values. Through the simulation analysis of an actual complex distribution network, the validity and efficiency of the proposed method is verified, and the influence of load fluctuation and transition resistance is small.