智能站合并单元智能终端改造与试验验证

合并单元、智能终端是智能变电站的关键设备,其性能直接关系到二次系统的可靠运行。由于合并单元、智能终端设备质量问题引起的跳闸事件影响恶劣,因此应当重视智能站合并单元、智能终端的整改更换工作。结合西北某750 k V智能变电站线路间隔合并单元、智能终端整改工作,介绍了整改技术方案、基于虚端子关联关系的安全措施、具体整改内容以及改造后的试验验证。改造的安全措施和试验方法可为今后开展此类智能站改造工作提供参考。

Rectification of Merging Cell and Intelligent Terminal in Smart Substation and Their Experimental Verifications

Merging cells and intelligent terminal are the key equipment in smart transformer substation,and their performances are directly related to the reliable operation of the secondary system.Since the poor quality of the merging cells and intelligent terminals will lead severe tripping incident and therefore,the replacement and rectification of the merging cells and intelligent terminals in the smart substation should be taken into account.This paper gives an introduction on the corrective technical solutions involving the rectification of line spacing,merging cells and intelligent terminals in a 750kV smart substation located in Northwest China,as well as safety measures based on virtual terminal relationship,the specific corrective contents and verification test post the rectification.The corrective safety measures and test methods can provide a reference for future rectification of smart substations.