| 引用本文: | 付聪,卞志鹏,王钤,唐景星,徐政.改善异步分区电网频率稳定性的VSC-HVDC控制策略[J].电力自动化设备,2019,39(11): |
| FU Cong,BIAN Zhipeng,WANG Qian,TANG Jingxing,XU Zheng.VSC-HVDC control strategy for enhancing frequency stability of segmented power grid[J].Electric Power Automation Equipment,2019,39(11): |
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| 摘要: |
| 为了缓解同步换相失败问题，广东电网规划采用基于电压源换流器型高压直流(VSC-HVDC)输电系统的电网分区技术，将东、西2个电网异步相连。但在分区后，电网的调频容量变小，频率稳定性变差，此时VSC-HVDC系统有必要参与分区系统的频率控制。设计了一种VSC-HVDC输电系统的频率控制策略：VSC换流站的d轴频率控制策略使得VSC换流站自动调节自身输出的有功功率；q轴辅助频率控制进一步稳定系统频率。使用PSS/E在广东电网中进行仿真分析，结果表明所提出的VSC频率控制策略有效提升了分区电网的频率稳定性。 |
| 关键词: VSC-HVDC输电系统 频率稳定性 分区电网 多馈入直流输电系统 频率控制 |
| DOI：10.16081/j.epae.201910013 |
| 分类号:TM721.1 |
| 基金项目:广东电网有限责任公司科技项目(GDKJXM2016-1786) |
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| VSC-HVDC control strategy for enhancing frequency stability of segmented power grid |
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FU Cong1, BIAN Zhipeng2, WANG Qian1, TANG Jingxing1, XU Zheng2
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1.Electric Power Research Institute of Guangdong Power Grid Corporation, Guangzhou 510080, China;2.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
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| Abstract: |
| In order to alleviate the problem of concurrent commutation failures, the DC-segmentation technique based on VSC-HVDC transmission technology is planned to split Guangdong Power Grid into two asynchronously operated sectors of the eastern and western sectors. However, the frequency regulation capa-city of the power grid becomes smaller and the frequency stability becomes worse after segmentation. In this case, it is necessary for the VSC-HVDC system to participate in the frequency control of the segmented power grid. A frequency control strategy is designed for the VSC-HVDC transmission system. In this stra-tegy, the d-axis control scheme of VSC station can achieve the automatic adjustment of the active power of VSC station, and the q-axis auxiliary frequency control scheme can further enhance the frequency stability of the system. The simulation is carried out in Guangdong Power Grid by PSS/E, and the simulative results show that the proposed frequency control strategy of VSC station can efficiently improve the frequency stability of the segmented power grid. |
| Key words: VSC-HVDC transmission system frequency stability segmented power grid multi-infeed HVDC transmission system frequency control |
