Frequency Response Capability by Power-to-Heat Facilities: Contribution to the Frequency Stability of Korea’s Power System; [발전열병합설비의 주파수 응답 성능: 우리나라 전력계통의 주파수 안정성에 기여]

Abstract

In the Korea’s electric power market, combined heat and power plants participating as a rigid supply during the winter season, do not engage in automatic generation control and load-following operations due to equipment reliability issues. Therefore, investment in flexible resources is essential for stable grid operation. Power-to-Heat (P2H) technology, which links heat sector and electrical power sector, is gaining attention. P2H can consume over-generation of solar power during the daytime for thermal production, offering economic benefits to the heat sector. Additionally, it can contribute to grid flexibility by adjusting the input power of electric boilers according to system conditions. This paper utilizes a power system frequency dynamic model to simulate a simple electric boiler frequency response. It also analyzes the impact of introducing P2H technology on frequency stability, considering Korea's 2030 generation mix. © 2024 Korean Institute of Electrical Engineers. All rights reserved.