张玉红;姜懿郞;秦晓辉;毕振;周勤勇;

• 1:电网安全与节能国家重点实验室(中国电力科学研究院有限公司)

摘要(Abstract)：

特高压直流的持续换相失败导致闭锁将对直流送受端电网产生严重威胁。该文详细分析了当前特高压直流持续换相失败闭锁直流的控制策略,研究了降低直流运行功率对持续换相失败的改善机理。提出了利用直流功率速降以降低持续换相失败风险的技术措施,包括基于交流电网故障事件的直流功率速降方案,以及基于交流电网故障及两次持续换相失败事件的直流功率速降方案。采用典型参数的简单算例和实际电网分析验证了两种功率速降方案的有效性和适应性。所提出的技术措施可为实际直流系统运行及保护策略提供参考,具有较好的实际应用前景。

关键词(KeyWords)： 换相失败;直流功率速降;直流闭锁;控制措施

Abstract:

Keywords:

基金项目(Foundation): 国家电网公司总部科技项目“特高压交直流馈入密集网络后电网强弱评价指标及分区方法研究”(XT71-16-028)~~

作者(Author): 张玉红;姜懿郞;秦晓辉;毕振;周勤勇;

Email:

DOI: 10.13335/j.1000-3673.pst.2018.0306

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