Fuzzy logic based load frequency control of grid connected distributed generators

Abstract

With the ever increasing demand for power, conventional energy sources alone cannot be depended upon for power generation. Distributed renewable energy systems are identified as a suitable alternative. However the intermittent nature of these sources increases the frequency deviations which further add to the deviations caused by load variations. Hence it is a prerequisite to keep the system frequency constant. By implementing Load-frequency control (LFC), the frequency deviations can be limited. The main aim of the LFC in an interconnected power system is to keep the frequency deviations in the control areas within the pre-specified limits and to maintain tie-line power flows within the allowable limits while accommodating fluctuating load demands. Here a control strategy for frequency regulation of the distributed PV and Electric Vehicles (EVs) along with the conventional generators is designed using fuzzy logic controller.