王玉龙,戴光武,赵青春,徐晓春,谢华,李奔,孙睿晨
WANG Yulong,DAI Guangwu,ZHAO Qingchun,XU Xiaochun,XIE Hua,LI Ben,SUN Ruichen

• 1:南京南瑞继保电气有限公司
• 2:南京南瑞继保工程技术有限公司

摘要(Abstract)：

针对多段式混合输电线路因各段不同而导致接地距离保护整定中可靠性与灵敏性难以兼顾的问题，提出一种考虑综合零序补偿系数选取和灵敏度系数补偿的接地距离保护整定优化方法。揭示了零序补偿系数在混合线路不同段的单调变化特性；提出基于混合线路连接点与距离Ⅰ段保护范围末端零序补偿系数的综合零序补偿系数整定方法，以提高距离Ⅰ段区内故障的动作可靠性；为满足距离保护Ⅱ、Ⅲ段的灵敏度要求，提出考虑综合零序补偿系数、最大零序补偿系数与全阻抗零序补偿系数的保护灵敏度补偿系数的整定方法。通过三段式、四段式混合线路算例分析，验证了所提整定优化方法的有效性。
To address the difficulty in simultaneously achieving reliability and sensitivity in the setting of ground distance protection for multi-section hybrid transmission lines due to the heterogeneity of individual line sections, an optimized setting method is proposed that incorporates the selection of a composite zero-sequence compensation factor and sensitivity coefficient compensation. The monotonic variation characteristics of the zero-sequence compensation factor across different sections of hybrid transmission lines are revealed. A setting method for the composite zerosequence compensation factor is proposed based on the junction point of the hybrid line and the zero-sequence compensation factor at the end of the Section 1 protection reach, thereby improving the operating reliability for internal faults within Section 1. To satisfy the sensitivity requirements of Section 2 and Section 3 distance protection, a setting method for the protection sensitivity compensation coefficient is further proposed, taking into account the composite zero-sequence compensation factor, the maximum zero-sequence compensation factor, and the fullimpedance-based zero-sequence compensation factor. Case studies on three-section and four-section hybrid transmission lines verify the effectiveness of the proposed setting optimization method.

关键词(KeyWords)： 多段混合线路;接地距离保护;零序补偿系数;连接点;GIL;整定
multi-section hybrid transmission line;ground distance protection;zero-sequence compensation factor;junction point;GIL;setting

Abstract:

Keywords:

基金项目(Foundation): 智能电网国家科技重大专项（2025ZD0807403）

作者(Author): 王玉龙,戴光武,赵青春,徐晓春,谢华,李奔,孙睿晨
WANG Yulong,DAI Guangwu,ZHAO Qingchun,XU Xiaochun,XIE Hua,LI Ben,SUN Ruichen

DOI: 10.19585/j.zjdl.202605003

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