一种广域差动保护实现方法 - 电工技术学报.pdfVIP

20 14 年 2 月 电 工 技 术 学 报 Vol.29 No. 2 第29 卷第2 期 TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY Feb . 2014 一种广域差动保护实现方法 张兆云,陈卫,张哲,陈德树 （强电磁工程与新技术国家重点实验室 华中科技大学 武汉 430074 ） 摘要 广域保护是继电保护发展的重要方向之一，其中广域差动保护是一个重要的分支。本 文提出了基于 IEC61850 的广域差动保护的整体架构，定义了差动环的基本概念，提出了广域差 动保护的判据以及实现方式。在此基础上，明确了差动环动态扩展的概念，利用扩展环将差动保 护用于断路器失灵的后备保护。该方案有效地解决了现有的失灵保护容易误动以及支路异常时的 保护速动性问题。动模仿真试验证明了所述方案的正确性。 关键词：广域保护 差动保护 差动环 失灵保护 中图分类号：TM77 A Method of Wide-Area Differential Protection Zhang Zhaoyun , Chen Wei, Zhang Zhe, Chen Deshu （State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science Technolo gy Wuhan 430074 China ） Abstract The wide-area protection is one of the important directions for the development of relay protection, and wide -area differential protection is an important branch. In this paper, the overall architecture of the wide-area differential protection based on IEC61850 is proposed, the basic concepts of the differential ring is defined, and action criterion and method of the wide -area differential protection is proposed . The blocking conditions of the wide -area differential protection are described, and the dynamic extension of differential ring in case of a branch failure is analyzed. The wide-area differential protection based on the differential ring is effective solution to the existing failure protection easy to malfunction a nd the dead zone fault. Dynamic simulation system verifies the feasibility and correctness of the proposed method. Keywords ：Wide-area protection, differential protection, differential ring, failure protection 1 引言