| 引用本文: | 吕东晓,刘阳,张今,林湘宁,冀吉豪,翁汉琍,李正天,魏繁荣.兼顾连锁跳闸免疫和端部故障响应能力的距离保护Ⅲ段自适应椭圆动作特性研究[J].电力自动化设备,2024,44(11):217-224. |
| Lü Dongxiao,LIU Yang,ZHANG Jin,LIN Xiangning,JI Jihao,WENG Hanli,LI Zhengtian,WEI Fanrong.Study on self-adaptive elliptical operation characteristics of distance protection zone Ⅲ taking into account immunity of cascading trip and responseability to near-end and far-end faults[J].Electric Power Automation Equipment,2024,44(11):217-224. |
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| 兼顾连锁跳闸免疫和端部故障响应能力的距离保护Ⅲ段自适应椭圆动作特性研究 |
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吕东晓1,2, 刘阳1,2, 张今1,2, 林湘宁3, 冀吉豪4, 翁汉琍4, 李正天3, 魏繁荣3
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1.国家电网有限公司华中分部，湖北 武汉 430077;2.柳焕章劳模创新工作室，湖北 武汉 430077;3.华中科技大学 强电磁工程与新技术国家重点实验室，湖北 武汉 430074;4.三峡大学 电气与新能源学院，湖北 宜昌，443002
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| 摘要: |
| 针对潮流转移引发距离保护Ⅲ段误动作的问题，提出了一种基于椭圆动作特性的保护自适应调节优化策略。分析了现有透镜形判据自适应调节所存在的问题，针对性地设计了椭圆形判据，并探讨了其整定原则。理论分析及基于PSCAD的仿真结果表明，所提策略可有效规避以距离保护Ⅲ段为代表的后备保护应对潮流转移工况时可能存在的误动作风险，且在区内短路故障时允许保护正确动作。相较于现有的自适应调节距离保护Ⅲ段保护判据，采用所提判据的保护抗过渡电阻能力得到了有效恢复。 |
| 关键词: 继电保护 后备保护 距离保护Ⅲ段 连锁跳闸 潮流转移 椭圆动作特性 自适应调节 |
| DOI：10.16081/j.epae.202408001 |
| 分类号:TM77 |
| 基金项目:国家电网有限公司华中分部科技项目(521400230004) |
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| Study on self-adaptive elliptical operation characteristics of distance protection zone Ⅲ taking into account immunity of cascading trip and responseability to near-end and far-end faults |
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Lü Dongxiao1,2, LIU Yang1,2, ZHANG Jin1,2, LIN Xiangning3, JI Jihao4, WENG Hanli4, LI Zhengtian3, WEI Fanrong3
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1.Central China Branch of State Grid Corporation of China, Wuhan 430077, China;2.Lamor Innovation Studio of Liu Huanzhang, Wuhan 430077, China;3.State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;4.College of Electrical Engineering & New Energy, China Three Gorges University, Yichang 443002, China
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| Abstract: |
| Aiming at the problem of mal-operation of distance protection zone Ⅲ caused by power flow transfer, a protection self-adaptive adjustment optimization strategy based on ellipse operation characteristics is proposed. The problems of self-adaptive adjustment of the existing lens-type criterion are analyzed, the ellipse criterion is designed in a targeted manner, and its setting principle is discussed. Theoretical analysis and simulative results based on PSCAD show that the proposed strategy can effectively avoid the possible mal-operation risk of the backup protection represented by distance protection zone Ⅲ during power flow transfer, and allow the correct operation in the case of real internal short circuit fault. Compared with the existing self-adaptive adjustment criterion for the distance protection zone Ⅲ,the ability of withstanding transition resistance of the protection adopting proposed criterion has been effectively restored. |
| Key words: relay protection backup protection distance protection zone Ⅲ cascading trip power flow transfer elliptical operation characteristics self-adaptive adjustment |
