Research on optimization method of primary frequency modulation capability based on different ratios of hydropower
| Autor: | Xing Chen, Zhang Liwei, Wenchao Zhang, Fan Maosen, Pan Xiaojie |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:GE1-350
Computer science business.industry 0211 other engineering and technologies Thermal power station 02 engineering and technology 010501 environmental sciences Grid 01 natural sciences Stability (probability) Electric power system Electric power transmission Transmission (telecommunications) Control theory 021108 energy business Frequency modulation Hydropower lcsh:Environmental sciences 0105 earth and related environmental sciences |
| Zdroj: | E3S Web of Conferences, Vol 185, p 01031 (2020) |
| ISSN: | 2267-1242 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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