安超印　张玉玲

摘要：为了建立安全稳定的智能化超高压交直流输电系统，基于超高压直流分层的接入模式对影响交直流系统换相的因素进行分析，提出换相失败情况下的预防协调控制方法，提升非故障层阀组抵御换相失败的能力。设计超高压隔离开关智能控制方案，基于传感器设计开关控制模块并接入到超高压开关智能组件柜中，设计的隔离开关具备监测、诊断、控制以及数据传输等功能。对设计的超高压交直流输电系统换相协调策略和智能化超高压开关进行测试，结果表明：采用换相协调策略后，线路1和线路2的总损耗分别降为0.013 7、0.013 0 pu，低于采用未改进换相方式的损耗量。超高压隔离开关系统对不同类型隔离开关状态的检测准确率在80%以上，误检率为15%。

关键词：超高压隔离开关; 交直流输电系统; 智能控制器; 输电系统换相协调控制

中图分类号：TM7

文献标识码：A文章编号：1001-5922（2022）06-0115-005

Electrifiedaccess mode of disconnector in extra high voltagealternating current/direct current transmission system

AN Chaoyin ZHANG Yuling

（1. State Grid Henan Electric Power Company， Zhengzhou 450032， China;

2. Henan Jiu Yu Bo Hui Ark Consulting Development Co.， Ltd.， Zhengzhou 450032， China

）

Abstract：The study aims to establish a safe and stable intelligent Extra High Voltage （EHV） Alternating Current/Direct Current （AC/DC） transmission system. First， based on the hierarchical access mode of EHV DC， the factors affecting the commutation of AC/DC system are analysed， and preventive and coordinated control method in case of commutation failure is proposed to enhance the ability of non-fault layer valve group to resist commutation failure. Second， the intelligent control scheme of EHV disconnector is designed. The switch control module is designed based on sensors and connected to the intelligent component cabinet of EHV switch. The designed disconnector has the functions of monitoring， diagnosis， control， and data transmission. Finally， the commutation coordination strategy and intelligent EHV switch of EHV AC/DC transmission system are tested. The experimental results show that the total loss of line 1 and line 2 is reduced to 0.013 7， 0.013 0 pu after adopting commutation coordination strategy， which is lower than that without improved commutation. The detection accuracy of different types of disconnectors is more than 80%， and the false detection rate is 15%.

Key words：extra high voltage disconnector; alternating current/direct current transmission system; intelligent controller; commutation coordinated control of transmission system

随着超高压自流输电工程建设的加快，交流系统承载能力弱的特性逐渐暴露，因此超高压交直流混联系统具有强直弱交的特性，在这种模式下交直流系统相互依存和耦合。混联电网可以实现交流电系统为直流电电压供应的耦合关系，并确保电压系统的正确换相，并且直流系统可以通过传输功率确保混联电网系统交流电的稳定性[1]。智能超高压开关设备是智能电网和变电站建设的重要组成，得到了飞速的发展。超高压隔离开关是配合超高压断路器使用的一次设备，而超高压断路器已经实现智能化控制，超高压隔离开关还没有实现智能化[2]。……