Faults Detection and Isolation in Demand Side of Direct Current Microgrid

International Journal of Research and Scientific Innovation (IJRSI) | Volume V, Issue III, March 2018 | ISSN 2321–2705

Faults Detection and Isolation in Demand Side of Direct Current Microgrid

¹Vilas Bugade, ²Ganesh Patil, ³Pradeep K. Katti

  ^{1, 3} Department of Electrical Engineering, Dr. BabasahebAmbedkar Technological University, Lonere (Raigad), Maharashtra, India
²Dr.D.Y.Patil Institute of Technology, Pimpri, Pune, Maharashtra, India

Abstract:In conventional protection schemes of D.C. grid, the protection only is provided on A.C. side of the link using A.C. circuit breaker where A.C. and DC grids are interconnected, there were no any protection percolated on D.C. side. When fault occurs in D.C. system A.C .breakers sense and isolate whole D.C. link, causing completely de-energizing the D.C. link. Also, the current power electronic devices cannot survive or sustain high magnitude faults. Converters will shut down to protect themselves under faulted conditions. This causes unnecessary outage in the system. Also fault current is not extinguished quickly which is harmful for the converters. The objective of this innovation which presented in this paper is to detect and isolate only faulty section of the system and maintain supply continuity. This avoids the complete shutdown of whole system. Fault current in the isolated section is extinguished quickly through the diodes and resistors. It minimizes damage to the system. So healthy sections are operated without any disturbance and supply continuity is maintained through other buses.
Keywords—LVDC, Microgrid, RES, MOSFET

I. INTRODUCTION

The growing for the demand of electricity power increases complexity on generation and distribution system. This increase in demand causes imbalance, gap between supply and demand of power and creates large scarcity of non-conventional energy sources. To bridge the gap between supply and demand the renewable energy resources (RES) theaters vigorous role e.g. Solar PV, wind energy etc. This can serve by making it as Distributed Generation (DG) with RES are likely to become wide spreading in demand side management, due to environmental aspects as well as commercial benefits of DG. Increased penetration of DG in distribution networks also poses challenges and these will depend on a variety of factors, such as the generation technology, the voltage level the DG. Also it is associated with, the size of the producing plant and on the type of network (e.g. rural or urban).

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