Operational strategies for performance improvement of microgrid

Abstract

In the recent years, increase in load demands, crisis of fossil fuel for conventional newlinepower generation and the environmental pollution issues have led to serious concern newlineabout exploitation of the renewable energy sources (RES). As these RESs are newlinedecentralized to have reduced transmission loss, increased reliability, improved newlinepower quality and rural electrification, formation of microgrid becomes a viable newlineoption. The existing distribution system is held responsible for consumer reliability newlineissues due to aging infrastructure, older grid designs and various other environmental newlineissues. In addition to it, the recent global drive towards sustainable energy system newlinehas governed the recent transition and performance evolution of the power system. newlineFirst in line, is the integration of RESs at the distribution level. Secondly, the newlinedistributed generations (DGs), which are mostly placed close to the consumption newlinepoint, involves low voltage level and contribute towards operational challenges like, newlinevoltage control, distribution network congestion, maintenance of power quality due newlineto heterogeneous nature of load and intermittent RES. newlinePenetration of RESs and DGs in the distribution system can be problematic for newlineancillary services including voltage control, frequency control, network congestion newlinemanagement and demand side management (DSM). Intermittent and uncertain nature newlineof renewable sources might cause a problem in the proper functioning of traditional newlinevoltage control techniques. The present thesis aims to develop efficient voltage newlinecontrol techniques, congestion management techniques and demand response (DR) newlinestrategies for a microgrid and/or a smart distribution system. This thesis proposes the methods of voltage profile improvement, congestion newlinemanagement and load management scheme for DSM. It aims to achieve all day newlinevoltage control strategy. It also proposes a loss allocation method, by using graphtheory based index, applicable to distribution system.