ABSTRACT
In recent years, many countries have gradually developed a Distributed Generation (DG) in the distribution network. In the event of a fault, it should immediately be able to locate the fault section in the distribution network and isolate it; then restore the power supply, so as to reduce the user’s power outage time, and to ensure power supply reliability and power quality. The distribution network fault location is one of the basic functions of the distribution automation. Many research works have been carried out in this area (Ji et al. 2005, Ma et al. 2009, Sun et al. 2009). However, when DG is connected to the distribution network, the power flow and short-circuit current will be changed too, which leads to the traditional distribution network fault location method being no longer in application. LIU et al. 2013 studied the fault location technique for the distribution system considering DG based on short-circuit current, but a threshold needs to be found to reliably identify the short-circuit current supplied by the power source with the short-circuit supplied by the DG, and only then the fault location can be realized. Li et al. (2005) has suggested the influence of distributed generations on the distribution of network loss, but voltage and power quality is also analyzed.
