E3S Web Conf.
Volume 185, 20202020 International Conference on Energy, Environment and Bioengineering (ICEEB 2020)
|Number of page(s)||7|
|Section||Energy Engineering and Power System|
|Published online||01 September 2020|
Research on optimization method of primary frequency modulation capability based on different ratios of hydropower
1 Central China Branch of State Grid Corporation, Wuhan, Hubei Province, 430077, China
2 Beijing Kedong Electric Power Control System Co., Ltd., Beijing, Beijing, 100089, China
* Corresponding author’s e-mail: firstname.lastname@example.org
With the continuous development of China’s cross-regional interconnected power grid, large- capacity and long-distance transmission have become an important feature of China’s power grid. As the transmission capacity of single-return transmission lines continues to increase, the risk of frequency fluctuations increases, making grid operation scheduling more concerned with the performance of the unit’s primary frequency modulation. This paper tests the frequency stability of a power system under different scenarios, in which the proportion of water and thermal power in the system is different. The results represent that a system with a large proportion of hydropower has poorer frequency stability. This paper offers a method of primary frequency modulation, which proposed to improve the frequency stability of the system by increasing the time delay of the hydropower unit’s governor. The results of simulation prove that this method is an available solution to solve the problem of poor system frequency stability when a system has a high ratio of hydropower.
© The Authors, published by EDP Sciences, 2020
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