Load Frequency Control in Four-area Interconnected Power System Using Fuzzy PI Controller With Penetration of Renewable Energies

Load frequency control (LFC) in an interconnected power system is advancing towards a crucial path due to the modern penetration of highly uncertain renewable energy sources in power systems. The modern LFC systems should be capable of handling complex regulation problems with a high degree of renewable source diversification to assure the generation-load balance. In this contribution, a rule-based fuzzy PI controller is implemented in a four-area interconnected power system with penetration of renewable energy sources like wind energy, hydro-gen aqua electrolyzer - fuel cell (HAE-FC), photo-voltaic (PV) system, and geothermal energy sources separately in each area along with a conventional energy source. The frequency response of four-area interconnected power system is obtained employing a rule-based fuzzy PI controller for load disturbances and is compared with the conventional PI controller. The simulation results demonstrate the superiority of the fuzzy PI controller over the conventional PI controller.