Onsite testing for assesment of Primary Frequency Response in Thermal generating Units

This paper presents a thorough study of the Primary Frequency Response (PFR) in thermal power units, focusing on its vital role in maintaining grid stability. The study utilizes extensive findings based on onsite testing of thermal generation plants in Indian power system which was carried out to evaluate PFR performance across various thermal units. Key aspects analyzed include droop characteristics, response stability, response activation, rate of response and turbine-governor model validation. The methodology involved simulated frequency injections at different load levels, capturing critical data on active power, frequency, steam pressure, and valve positions. The findings reveal significant insights into the effectiveness of current PFR implementations and highlight areas for improvement. Recommendations are provided to enhance PFR capabilities, ensuring compliance with regulatory standards and improving overall grid reliability.