Load frequency control of distributed generation penetrated multi area power system using optimization techniques

Abstract

In an interconnected electrical power system, an unexpected load shift in any one area results in the frequencies of all areas varying, as also the power in the tie line. Renewable energy sources are deployed to fulfil the rising need for energy. As most Distributed Generation (DG) sources fluctuate by nature and are time-dependent, source variation needs to be considered along with load changes in the LFC. Integration of these sources in a power system adds complexity, necessitating the development of novel control mechanisms to maintain system stability by ensuring frequency at a nominal value. The main goals of load frequency control (LFC) are to maintain the frequency inside a specific bound, ensure the desired power output in the power system, and also manage variations in tie-line power between interconnected control areas. As a result, an LFC scheme primarily involves a suitable power system control method capable of restoring the frequency of each region and tie-line power to appropriate set point levels after a load shift and during source fluctuation. newlineRenewable energy supplies are in high demand to meet the need for electricity. Though renewable energy sources are included in power systems as they are successful in producing electricity, frequency deviations in a hybrid system is greater. This makes the analysis more complex. However, implementing a new optimization technique will help to ease the LFC study of DG penetrated power systems. An attempt is being made in this research about an interconnected power system linked to distributed generation such as wind and a solar Photo Voltaic system to provide a better alternative. The 62-bus Indian utility system is modelled as a four-area system with renewable sources and also analysed. newline newline newline