Advanced control for multi-area power system incorporating renewable energy sources and energy storage systems

• Main Author: Bishoyi Aswini Kumar
• Other Authors: Wen Changyun
• Format: Thesis-Doctor of Philosophy
• Language: English
• Published: Nanyang Technological University 2023
• Subjects: Engineering::Electrical and electronic engineering
• Online Access: https://hdl.handle.net/10356/172272
• Institution: Nanyang Technological University

It is too ambitious, but renewables could supply four-fifths of the world’s electricity by 2050, massively cutting emissions and helping to mitigate climate change. This transformation of the global energy system to reduce greenhouse emissions requires engagement at all levels. In a feasible energy future, mass inclusion of alternate energy (Wind, Tidal) into the grid will play a viable role in the transformation. The aim of this thesis is to study the dynamic response of interconnected power systems in energy mix environment with support from Energy storage system during load change or disturbance. A three-area power system is developed with non-reheat type of turbines and its associated controls Droop and AGC. Riccati equation based decentralized state feedback controller is designed to assist load frequency control. For the decentralized control design, aim was not to use the states from the other areas and not to use immeasurable states from its own area. During testing GRC was considered for the turbine and the integrating controller (to avoid excessive controlling). The study further developed to design a DFIG based wind turbine and tested to witness associated dynamics and control. Further the study developed to design a PMSG based Tidal Turbine System and its control. As renewable energy systems (Wind and Tidal) are intermittent in nature, though tidal generation is predictable for a longer horizon, requires support from Energy storage systems for Load frequency control. As renewable energy systems are associated with power electronics, isolated from power system for frequency support. Energy storage system (Battery storage system and Supercapacitor) is included to support during high penetration of the wind energy and tidal energy to the grid. A three-area power system in energy mix-environment with ESS is proposed with its control strategies (with conventional controllers) for Inertial Frequency and Primary responses. Satisfactory frequency response achieved by the controllers for the energy storage systems. Size of the ESS is calculated based on the size of the disturbance the power system is ready for and the amount of renewable energy penetration.