| 引用本文: | 彭春华,张艳伟.基于电流正序分量相位比较的主动配电网保护方案[J].电力自动化设备,2016,36(6): |
| PENG Chunhua,ZHANG Yanwei.Protection scheme based on phase comparison of positive-sequence fault current for active distribution network[J].Electric Power Automation Equipment,2016,36(6): |
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| 摘要: |
| 主动配电网中分布式电源渗透率的提高和运行方式的复杂性可能引起保护拒动、误动或重合闸失败等问题，为此提出了一种适用于主动配电网的保护方案。该方案基于故障电流正序分量和参考相量的相位比较构造了故障方向判据，可快速准确地定位故障区段，并由此实现故障点上、下游保护有选择性地配合动作。考虑到实际应用中系统误差的存在，通过引入泛化角提高了故障方向判据的鲁棒性。该方案只需要故障后电流信号，可减少电压互感器的装设，且保护配合只需要传输闭锁信号和跳闸信号，可降低对通信的要求。最后通过对不同类型故障的仿真，验证了该方案的有效性。 |
| 关键词: 正序 相位比较 故障方向 主动配电网 继电保护 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目（51567007）；江西省科技支撑计划项目（20142BBE50001）；江西省自然科学基金项目（20152ACB20017，20151BAB216020） |
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| Protection scheme based on phase comparison of positive-sequence fault current for active distribution network |
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PENG Chunhua, ZHANG Yanwei
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School of Electrical and Electronic Engineering，East China Jiaotong University，Nanchang 330013，China
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| Abstract: |
| Since the increased penetration of distributed generation and the operational complexity of active distribution network may cause the improper operation and reclosing failure of protections，a protection scheme is proposed for it，which constructs the fault direction criterion based on the comparison between the positive-sequence fault current and the reference phasor to quickly and accurately locate the fault zone and then realize the selectively cooperative actions of the upstream and downstream protections. Due to the system error，the generalized angle is adopted in the actual application to enhance the robustness of direction criterion. Since this scheme needs only the post-fault current information，less voltage transformers are installed. As the cooperation between protections needs only the transmission of blocking signal and trip signal，the demand of communication is reduced. The efficiency of the proposed scheme is verified by the simulations in different fault conditions. |
| Key words: positive sequence phase comparison fault direction active distribution networks relay protection |
