| 变压器角接侧两相故障的远后备保护问题 |
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| 引用本文： | 杨旭东. 变压器角接侧两相故障的远后备保护问题[J]. 电力系统自动化, 2001, 25(17): 45-46 |
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| 作者姓名： | 杨旭东 |
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| 作者单位： | 河北省衡水供电公司, |
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| 摘 要： | 探讨了电力变压器的远后备保护问题，特别是当变压器角接侧（非电源侧）发生两相故障且变压器保护失去直流电源的情况下变压器的远后备保护问题，通过相量图分析此时变压器高，低压侧故障电流的特点，进而提出一种远后备保护方案，彻底解决了变压器角接侧发生两相故障时远后备保护灵敏度不足的问题。
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| 关 键 词： | 继电保护 远后备保护 电力变压器 电力系统 微机保护 |
| 收稿时间： | 1900-01-01 |
| 修稿时间： | 1900-01-01 |
REMOTE BACKUP PROTECTION FOR PHASE-TO-PHASE FAULTS AT THE ANGLE-CONNECTED SIDE OF TRANSFORMERS |
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| Yang Xudong Hebei Hengsui Power Supply Inc,Hengsui ,China. REMOTE BACKUP PROTECTION FOR PHASE-TO-PHASE FAULTS AT THE ANGLE-CONNECTED SIDE OF TRANSFORMERS[J]. Automation of Electric Power Systems, 2001, 25(17): 45-46 |
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| Authors: | Yang Xudong Hebei Hengsui Power Supply Inc Hengsui China |
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| Affiliation: | Yang Xudong Hebei Hengsui Power Supply Inc,Hengsui 0 5 30 0 0,China |
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| Abstract: | This paper mainly discusses the remote backup protection of transform ers,especially when the phase- to- phase fault occurs at the angle- connected side non- power supply side of transformers and the transformer protection loses its DC power supply. Through the phasor diagram analysis of the fault currents at both sides of transform er,a new remote backup protection schem e is proposed.The scheme com pletely solves the problem that the remote backup protection is not sensitive enough when phase- to- phase fault occurs at the angle- connected side of transform ers. |
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| Keywords: | protective relaying transform er rem ote backup protection |
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