Abstract
Grid operation is compromised when huge disturbances or fault occurs in power system. Generating units using conventional energy source mitigates the power system security and reliability issues based on their respective control strategies. Generator control action such as load frequency control (LFC) is required to ensure that system frequency can be restored to nominal values. In this study, the virtual power plant (VPP) which represents combination of decentralized generating units which primarily consists of RE source is investigated in its process to aid LFC in providing frequency regulation during generator fault. PSO and FA optimization technique is used to optimize the LFC parameters and subsequently investigate the impact of VPP in power system. Simulations are carried out on two area reheat thermal power system and the system performance in terms of settling time, overshoot value and performance index is observed. Results shows that VPP is able to mitigate the frequency collapse during generator fault in area 1. Simulation results indicate that the RES improve LFC in power system and can be optimized with different techniques for better performance. Simulation results indicates that the presence of VPP with FA optimized LFC is able to provide frequency ancillary service by regulating the system frequency back to its nominal value during generator fault.
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