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特高压直流输电工程单极保护降压试验研究

DOI: 10.13334/j.0258-8013.pcsee.2014.04.018, PP. 659-665

Keywords: 特高压直流输电工程,单极额定功率运行,保护降压试验,无功功率和电压控制

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Abstract:

在向家坝至上海(简称向上)工程系统调试期间,针对送端(复龙站)系统较弱的情况,对送端系统电压控制进行研究,对单极大负荷运行可能发生的事故及防止对策提出预案。对单极额定负荷运行保护降压试验过程中直流电压、电流和触发角等参量地变化过程进行分析,剖析试验过程中直流控制的调节特性,对交/直流过电压进行分析,提出送端(向家坝侧)无功功率和电压控制参数,并进行临时整定,以确保单极大负荷运行期间送端系统电压的稳定和单极额定负荷70%降压运行试验的成功。通过实测的直流参数,对换流站无功功率和母线电压的计算分析,验证了试验前系统计算结果的正确性,并对送端电压稳定行进行分析,指出整流侧直流电压和电流剧烈波动不会危及系统的安全稳定运行。

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