三峡—常州±500kV直流输电工程控制保护系统改造  

Refurbishment of control and protection system for Three Gorges-Changzhou HVDC project

作　　者：李林[1] 王永平[1] 黄志岭[1] 卢亚军 LI Lin;WANG Yongping;HUANG Zhiling;LU Yajun(NR Electric Co.,Ltd,Nanjing 210002;State Grid Economic and Technological Research Institute Co.,Ltd,Beijing 102209)

机构地区：[1]南京南瑞继保电气有限公司,南京211102 [2]国网经济技术研究院有限公司,北京102209

出　　处：《电气技术》2022年第12期38-43,51,共7页Electrical Engineering

基　　金：国家电网公司总部科技项目(SGSXDK00SPJS2100509)。

摘　　要：针对三峡—常州±500kV直流输电工程控制保护主机掏屏改造、原位替换的局部改造需求,开发新一代控制保护平台,具有体积小、性能强大、接口丰富等优点。为了兼容与已有外部设备的接口,开展主机外部接口设计,减少了中间转发环节,提升了接口的性能;针对双套控制主机均故障时的功率转带、线路故障降压重启时的过电压、逆变侧请求功率回降时不能准确执行等问题,优化了控制保护策略,提升了可靠性,同时大大缩短了程序执行周期,降低了换相失败的风险。厂内联调试验和现场运行情况表明,上述设计方案行之有效,该方案的成功实施可为后续其他工程的改造提供参考。A new generation of control and protection platform has been developed to meet the refurbishment needs of the Three Gorges Changzhou±500kV HVDC project,such as screen removal transformation and in-situ replacement of the control and protection host.It has the advantages of small size,strong performance and rich interfaces.In order to be compatible with the interface with existing external devices,the host external interface is designed to reduce the intermediate forwarding link and improve the performance of the interface.Aiming at the problems such as power generation when both sets of control hosts fail,overvoltage when line fails to step down and restart,and failure to execute accurately when the inverter side requests power back down,the control and protection strategy is optimized to improve reliability,greatly shorten the program execution cycle,and reduce the risk of commutation failure.The joint commissioning test in the plant and the field operation show that the above design scheme is effective,and the successful implementation of this scheme can provide a reference for the subsequent transformation of other projects.

关 键 词：高压直流输电 控制保护 改造方案 系统设计 主机替换 

分 类 号：TM721.1[电气工程—电力系统及自动化]