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远海风电柔性直流送端交流系统故障协调控制
Authors
叶荣
彭忠
+3 more
李泰
郝俊芳
黄海
Publication date
1 November 2023
Publisher
Editorial Office of Journal of Global Energy Interconnection
Doi
Cite
Abstract
为提升远海风电对称双极柔性直流送端交流系统单相接地故障和两相短路故障工况(第一类故障)下的功率输送能力,以及三相接地故障工况(第二类故障)的交流电压稳定性,提出海上换流站协调控制策略。首先分析了第一类故障的过电压和极间环流产生机理,以及第二类故障的交流电压失稳机理。在此基础上,提出了功率平衡控制策略和输出有功电流策略。第一类故障下定电压控制极采用限压策略,功率平衡控制策略抑制极间环流,增大定电压控制极的功率,减少了交流电压控制器响应时间,提升了功率输送能力。第二类故障工况下,定电压控制极切换为交流电流控制模式,定功率控制极的输出有功电流策略抑制电压相量幅值和相位变化,解决了交流电压失稳的问题。最后,基于PSCAD/EMTDC搭建远海风电柔性直流送出系统仿真模型,仿真结果验证了所提控制策略有效性
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Last time updated on 16/01/2024