TITLE:
Fault Identification and Islanding in DC Grid Connected PV System
AUTHORS:
M. Mano Raja Paul, R. Mahalakshmi, Murugesan Karuppasamypandiyan, Ananthan Bhuvanesh, Rajendran Jai Ganesh
KEYWORDS:
PV System, DC Grid, Fault Identification, Islanding
JOURNAL NAME:
Circuits and Systems,
Vol.7 No.10,
August
8,
2016
ABSTRACT: Nowadays, the DC
distribution system has been suggested, as a replacement for the AC power
distribution system with electric propulsion. This idea signifies a fresh
approach of issuing energy for low-voltage installations. It can be used for
any electrical application up to 20 MW and works at a nominal voltage of 1000 V
DC. The DC distribution system is just an extension of the multiple DC links that previously available in all
propulsion and thruster drives, which typically comprise more than 80% of the electrical power
consumption on electric propulsion vessels. A fault detection and islanding
scheme for DC grid connected PV system is presented in this paper. Unlike
traditional ac distribution systems, protection has been challenging for dc
systems. The goals of this paper are to classify and detect the fault in the PV
system as well as DC grid and to isolate the faulted section so that the system
keeps operating without disabling the entire system. The results show the
measured values of power at PV panel and DC grid side under different fault
condition, which indicates the type of fault that occurs in the system.