Improvement Of Voltage Stability Using Statcom And Supercapacitor For Better Performance

Abstract

— This paper presents the performance of STATCOM to improve power quality and voltage stability. The STATCOM is proposed to control both active and reactive power exchange with the grid sides. It aims to provide a comprehensive control for a distributed network and improve stability. STATCOM are limited in their ability to improve the system stability margin due to restricted capability of delivering real power. However, due to its low voltage long time constant and voltage dependent energy storage, applying the supercapacitor to grid level application is challenging. This paper examines the steady state performance of three type of supercapacitor energy storage system. This paper proposes a solution to enhance the performance of the STATCOM by adding supercapacitor energy storage to the dc link of the conventional STATCOM. Supercapacitor are devices which can store significant amounts of energy and are able to quickly rele   ase it and are now finding application in many power applications. This paper describes how supercapacitor best energy storage technology can be interfaced to a STATCOM unit. The aim of this work is to investigate how supercapacitor best energy storage technology can be used to enhance the capability of STATCOM units to maintain high quality of distribution voltage and improve the system stability.