单CT配置方式下线路末端故障快切风险分析及解决方案  

Risk Analysis and Solution of Line End Fault Fast Switching under Single CT Configuration Mode

作　　者：高逸舟 GAO Yizhou(State Grid Hubei Electric Power Co.,Ltd.,Gucheng County Power Supply Company,Gucheng 441700,China)

机构地区：[1]国网湖北省电力有限公司谷城县供电公司,湖北谷城441700

出　　处：《通信电源技术》2023年第16期242-244,共3页Telecom Power Technology

摘　　要：电力系统中,传统的故障快切方案是根据不同线路末端的电流进行切除,因此需要为每个线路末端配置独立的电流互感器,增加了系统成本和工程实施难度。在单电流互感器(Current Transformer,CT)配置方式下,所有线路末端共用一个CT,能够减少成本,但会增加故障快切的风险。通过对单CT配置方式下线路末端故障快切风险的分析,发现存在的问题主要表现为CT采集电流和提供电流信息单一,可能引起保护误动作或漏动作。为解决这些问题,提出定值优化和跳位加速逻辑的解决方案。The traditional fault quick-cut scheme in power system is based on the current at different line ends,so it is necessary to configure an independent current transformer for each line end,which increases the cost of the system and the difficulty of engineering implementation.Under the single Current Transformer(CT)configuration mode,all lines share a CT,which can reduce the cost,but it will also increase the risk of fault fast switching.In this paper,through the analysis of the risk of line terminal fault fast switching under the single CT configuration mode,it is found that the existing problems mainly show that CT collects current and provides current information in a single way,which may cause misoperation or leakage of protection.In order to solve these problems,the fixed value optimization and jump acceleration logic are proposed.

关 键 词：单电流互感器(CT)配置 故障快切 定值优化 跳位加速逻辑 

分 类 号：TM715[电气工程—电力系统及自动化]