付华,陈浩轩,丰胜成,孟详峰

• 1:辽宁工程技术大学电气与控制工程学院
• 2:山西潞安环保能源开发股份有限公司
• 3:国网锦州供电公司

摘要(Abstract)：

在多端柔性直流MTDC(multi-terminal flexible DC)系统中,带有模块化多电平换流器MMC(modular multilevel converter)的直流线路的故障辨识是目前亟需解决的重大科学问题。通过分析直流线路故障期间的暂态电流和电压,提出一种基于单端暂态电流和电压的快速辨识方法。根据故障线路与非故障线路电流变化量的差异建立了故障线路辨识模型,依据正、负极暂态电压的样本标准差建立的故障极辨识模型,辨识时间短且无需两端数据通信。在PSCAD/EMTDC仿真平台搭建张北四端口柔性直流系统模型,通过算例验证了该方法能在各种故障下快速准确地辨识故障的类型,且具备一定的抗干扰性和耐过渡电阻能力,满足多端柔性直流系统对直流线路故障辨识的要求。

关键词(KeyWords)： 多端柔性直流系统;线路故障辨识;电流积分值;样本标准差;故障辨识模型

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51974151;71771111);; 辽宁省重点实验室基金资助项目(LJZS003)

作者(Author): 付华,陈浩轩,丰胜成,孟详峰

DOI: 10.19635/j.cnki.csu-epsa.000374

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