晶闸管控制变压器式可控高抗本体保护方案  

Research on Protection Scheme for Thyristor Controlled Transformer Controllable Shunt Reactor

作　　者：郑涛 赵彦杰 金颖 张振环 崔大伟 刘洋 杨通 秦川[3] 杨琪[3] 

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),北京市昌平区102206 [2]国网智能电网研究院,北京市昌平区102211 [3]四川省电力公司,四川省成都市610041

出　　处：《电网技术》2014年第9期2538-2543,共6页Power System Technology

基　　金：国家高技术研究发展计划(863计划)资助项目(2012A A050208);中央高校基本科研业务费资助项目(2014MS06);国家电网公司科技项目(SGRI-PK-71-13-001)~~

摘　　要：基于晶闸管控制变压器(thysistor controlled transformer,TCT)式可控高抗的本体结构和工作原理,对TCT式可控高抗本体保护配置进行了探讨,包括网侧绕组保护、控制绕组保护以及补偿绕组保护。重点对控制绕组保护进行了研究,分析了控制绕组各类故障的故障特征,结合数字仿真结果,指出了传统电抗器保护应用于TCT式可控高抗控制绕组在应对控制绕组引线单相接地故障、匝间故障和阀短路故障时存在可靠性或灵敏性不足的问题。针对上述问题提出将控制绕组侧电流互感器移至晶闸管阀末端并增设零、负序电流保护。Based on its own structure and working principle of thysistor controlled transformer controllable shunt reactor （TCTCSR）, the protection configuration for TCTCSR itself is discussed, including the protection of grid side winding, the protection for control winding and the protection for compensation winding. The research is focused on the protection for control winding and the fault features of various faults occurred in the control winding are analyzed. Combining with the results of numerical simulation, it is pointed out that there are defects of insufficient reliability or sensitivity, when traditional reactor protection is applied to winding protection for TCTCSR to cope with the single-phase earth fault occurred in the control winding lead, the turn-to-turn fault and the short-circuit fault of the valve. In allusion these defects, it is proposed to move the current transformer at the control winding side to the end of thyristor valves and to add zero-sequence and negative-sequence current protections.

关 键 词：晶闸管控制变压器式可控并联电抗器 本体保护配置 控制绕组保护 保护性能分析 

分 类 号：TM721[电气工程—电力系统及自动化]