Fault Identification and Islanding in DC Grid Connected PV System

M Mano Raja Paul,R Mahalakshmi,Murugesan Karuppasamypandiyan,Ananthan Bhuvanesh,Rajendran Jai Ganesh

doi:10.4236/cs.2016.710249

M Mano Raja Paul, R Mahalakshmi + Show 3 more

Open Access

https://doi.org/10.4236/cs.2016.710249

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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.

Highlights

The escalating rates of fossil fuels forced the researchers to envisage the renewable energy system
The researchers are interested in the techniques for power generation with the renewable energy sources such as solar, hydro, wind, tidal biomass etc
The simulation for fault identification have been done under five different conditions such as no fault, fault in PV panel, MPPT fault, DC-DC converter fault and grid fault

Summary

Introduction

The escalating rates of fossil fuels forced the researchers to envisage the renewable energy system. The researchers are interested in the techniques for power generation with the renewable energy sources such as solar, hydro, wind, tidal biomass etc. Power generation based on PV sources has gradually increases during the last few decades [1]. This development has been matched with research into more efficient solar panels. Along with research into solar panels, there is an interest in the adjacent equipment. A DC grid system has been proposed as a power network that enables the introduction of a large amount of solar energy using distributed photovoltaic generation units.

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