TITLE:
Research on Fault-feeder Selection Dvice
AUTHORS:
Ziming Zhuo, Haimeng Sun, Haibin Ji
KEYWORDS:
Resonance Grounding System; Earthed Fault Feeder Detection; Zero-Sequence Current Increment Method; Zero-sequence Transient Currents
JOURNAL NAME:
Energy and Power Engineering,
Vol.5 No.4B,
November
12,
2013
ABSTRACT: The
compensation current of the arc-suppressing coil makes the phase and amplitude
of zero-sequence measurement current of the earthed fault feeder to vary. It is
very hard to detect the fault feeder by using existing detectors based on
single method. In this paper, integrative feeder selection strategy—zero
sequence current increment method and the direction of transient current— is
put forward. Based on the integrative feeder selection strategy, the design of
fault-feeder selection device for one-phase-to ground fault on resonance
grounding system is presented. For the purpose of testing and validating the
operating principle of the device, the experiment of single-phase-to-ground
fault has been carried out on the simulation of 1.2 kV power network. The
results from many repeat experiments show that stability of the fault selection
device is satisfactory.