杨黎明,谢诗敏,王仲,陈福锋,薛明军,陈中
YANG Liming,XIE Shimin,WANG Zhong,CHEN Fufeng,XUE Mingjun,CHEN Zhong

• 1:国电南京自动化股份有限公司
• 2:东南大学电气工程学院

摘要(Abstract)：

串补电容的接入将改变线路的序网络阻抗及故障后的序电流分布，虽然对串补电容安装侧选相元件无不利影响，但可能会导致对侧选相元件误选相。为此，提出一种基于线模相电流的故障选相方法。首先，将线模相电流定义为各相故障分量电流与零序电流之差；然后，分析不同故障类型下线模相电流的特征，提取故障相与非故障相的特征差异，从而构造选相判据；最后，基于PSCAD平台进行仿真验证，结果表明，所提方法能够准确识别串补线路的故障相别，且其性能不受故障位置、线路长度、串补补偿度等因素的影响。
The connected series-compensated capacitors alter the sequence network impedance of transmission lines and the distribution of sequence currents during faults. While this does not adversely affect the phase-selection elements on the capacitor installation side, it may lead to misidentification by those on the opposite side. To address this, a fault phase selection method based on line-mode phase current is proposed. First, the line-mode phase current is defined as the difference between the fault-component current of each phase and the zero-sequence current. Next, the characteristics of line-mode phase currents under different fault types are analyzed to extract distinctions between faulted and non-faulted phases, from which the phase-selection criterion is constructed. Finally, the method is validated through simulations on the PSCAD platform. The results show that the proposed method can accurately identify the faulted phase in series-compensated transmission lines, and its performance is robust with respect to fault location, line length, and the degree of series compensation.

关键词(KeyWords)： 输电线路;故障选相;串补电容;故障分量;序分量
transmission lines;fault phase selection;series-compensated capacitor;fault components;sequence components

Abstract:

Keywords:

基金项目(Foundation): 国家电网公司总部科技项目（5108-202218280A-2-276-XG）

作者(Author): 杨黎明,谢诗敏,王仲,陈福锋,薛明军,陈中
YANG Liming,XIE Shimin,WANG Zhong,CHEN Fufeng,XUE Mingjun,CHEN Zhong

DOI: 10.19585/j.zjdl.202603007

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