| 消除变压器微机差动保护中不平衡电流方案研究 |
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| 引用本文： | 徐良骏,李坚.消除变压器微机差动保护中不平衡电流方案研究[J].供用电,2010,27(6):60-62. |
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| 作者姓名： | 徐良骏 李坚 |
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| 作者单位： | [1]上海交通大学,上海200240 [2]上海市电力公司市区供电公司,上海200080 [3]上海市电力公司技术与发展中心,上海200025 |
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| 摘 要： | 目前有些微机保护继电器受多种因素的制约,软件存在通用性方面不足的问题。针对用于某型号变压器的微机差动保护无法消除电流互感器二次回路中不平衡的问题,分析了变压器差动保护中产生不平衡电流的因素,根据电磁型和微机型差动保护继电器消除变压器差动保护不平衡电流的原理,提出了采用改变微机差动保护电流互感器二次回路的接线方式来解决这个问题的方案。
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| 关 键 词： | 变压器 差动保护 不平衡电流 |
Elimination of Unbalanced Current in Microprocessor-Based Differential Protection for Power Transformer |
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| XU Liangjun,LI Jian.Elimination of Unbalanced Current in Microprocessor-Based Differential Protection for Power Transformer[J].Distribution & Utilization,2010,27(6):60-62. |
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| Authors: | XU Liangjun LI Jian |
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| Affiliation: | 1.Shanghai Jiaotong University,Shanghai 200240,Shanghai China;2.Urban Power Supply Company of SMEPC,Shanghai 200080,Shanghai China;3.Technology and Development Center,SMEPC,Shanghai 200025,Shanghai China) |
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| Abstract: | Nowadays some microprocessor-based protection relays are constrained by various factors,so the software can not be used universally.Focused on unbalanced current not to be eliminated,in the secondary circuit of current transformer from microprocessor based differential protection of a certain type transformer.The paper analyzes the factor caused unbalanced current in transformer differential protection.According to the principle of eliminating transformer differential protection unbalanced current in relays of electromagnetic and microprocessor based differential protection,changing connection of current transformer secondary circuit of microprocessor based differential protection is raised to solve this problem in the article. |
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| Keywords: | power transformer current differential protection unbalanced current |
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