Power Quality Compensation In Ac Micro Grid Using Optimal Controller

Abstract

The expanding electrical transmission and distribution system in the modern era newlinehas made the traditional non-conventional energy based power system network more newlinecomplex and delicate. This exponential growth in power demand is because of the many newlinefold increase in population and rapidly increasing industrialization to meet the demand. newlineThe conventional electrical power generation system consisting of fossil fuel based newlinegeneration is gradually replaced by non-conventional renewable energy based resources. newlineAmong these renewable energy based power sources the solar energy, wind energy, fuel newlinecell, geothermal energy etc. play key role in electrical power generation. The popularity newlineof the renewable energy resources are because of their abundant availability, zero carbon newlineemission and ecofriendly nature. The renewable energy resources have demerits like newlinethey are intermittent in nature, dependent upon climatic variations and remotely located. newlineThe growing penetration of renewable energy resources have given rise to the idea of newlinesmall and distantly located generating units popularly known as Micro Grid. The Micro newlineGrid connection with the Utility Grid requires additional power electronic converters. newlineFurther the rapid industrialization and growing utilization of domestic nonlinear loads newlinelike refrigerators, air conditioners etc. along with the mandatory power converters newlineintroduce power quality issues in the distribution system. newlineThe power quality issues are of many types and can be classified as voltage sag, newlinevoltage swell, voltage unbalance, oscillatory transient, voltage notch, voltage flicker, newlineTotal Harmonic Distortion (THD), voltage deviation, system frequency deviation, poor newlinepower factor, etc.. The power quality issues must be limited within their satisfactory newlinelimits for the desirable transmission and distribution of electric power at the generation newlineand customer levels. The electrical power with poor power quality, may cause newlineoverheating, mal-operation or permanent damage of the delicate complex instruments, newlineloads and power elect