溪洛渡—浙西特高压直流投运后系统稳定特性及协调控制策略

发布时间：2018-11-23 12:22

【摘要】：溪洛渡—浙西特高压直流投运后,将与复龙—奉贤特高压直流形成我国届时最密集的特高压多直流送出系统。分析了多直流送出系统与交流电网的耦合特性,提出了多直流送端系统故障后送端交直流协调控制策略。多直流送出系统由于电气距离较近,故障后相互支援可靠性较高,且对送端区域电网潮流影响较小;但存在多个直流同时闭锁的风险,需要采取大量的控制措施。研究了溪浙直流投运后与受端交流电网相互影响规律,并对交流系统和直流系统重要参数进行敏感性分析。结果表明,优化参数能有效提升受端电网稳定性。
[Abstract]:After the Xiluodu-west Zhejiang UHV DC is put into operation, the most dense UHV DC delivery system will be formed in our country with Fulong-Fengxian UHV DC. The coupling characteristics of multi-DC power supply system and AC power network are analyzed, and a coordinated AC / DC control strategy is proposed. Because of the close electrical distance, the multi-DC power supply system has high reliability of mutual support after failure, and has little influence on the power flow of the power supply area, but there is a risk of multiple DC simultaneous locking, which requires a large number of control measures. In this paper, the interaction law between DC and AC power grid is studied, and the sensitivity of the important parameters of AC system and DC system is analyzed. The results show that the optimal parameters can effectively improve the stability of the receiver power network.
【作者单位】：中国电力科学研究院;
【分类号】：TM721.1

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