ABSTRACT
This chapter discusses load frequency control issues in three area hybrid power systems. A hybrid power system is the combination of conventional units such as thermal power along with microgrid units such as wind turbine generators, fuel cells, aqua electrolyzers, diesel engine generators and battery energy storage systems. For enhancement of frequency regulation, different secondary controllers such as proportional integral derivative, two-degrees-of-freedom PID (2DOF-PID) and three-degrees-of-freedom PID (3DOF-PID) are used to maintain the mismatch between real power generation and load demand. The controlled parameters are optimized by the symbiotic organism search (SOS) algorithm for optimal outcomes of difficulties in LFC. SOS models the symbiotic dealings established by an organism to exist in the ecosystem. The dynamic behaviors of controllers optimized by SOS, teaching learning-based optimization (TLBO) and hybrid differential evolution particles warm optimization (DEPSO) are compared through extensive simulation. Also, system dynamics are compared among PID, 2DOF-PID and 3DOF-PID controllers through numerous simulations.
