云广直流晶闸管失效原因分析与控制保护逻辑优化研究  

Analysis of thyristor failure event and logic optimization controlling and protection in Yun-Guang Project

作　　者：刘涛 赵晓斌 李凌飞 李岩 

机构地区：[1]南方电网科学研究院有限责任公司,广东广州510080

出　　处：《电力系统保护与控制》2014年第2期93-96,共4页Power System Protection and Control

摘　　要：2012年4月23日云广特高压直流孤岛调试后发生了晶闸管失效事件。分析了晶闸管失效原因,梳理了控制保护紧急停运及闭锁流程,指出了控制保护逻辑存在的问题,提出了逻辑优化方案,并进行了EMTDC和RTDS仿真。仿真试验验证了旁路开关合闸逻辑优化后的有效性和正确性。优化方案已在云广及糯扎渡特高压直流输电工程控制保护程序中实施,并在云广工程后续的孤岛调试过程中发挥了积极作用,未再发生由于孤岛双极闭锁试验导致晶闸管失效的事件。Thyristor failure event occurred after Ultra HVDC island commissioning on April 23, 2012. This paper analyzes the reason of thyristor failure, introduces the process of the emergency shutdown and block of controlling and protection, and points out the controlling and protection logic problems. The logic optimization solutions are proposed and EMTDC and RTDS simulations are carried out. Simulation results verify the validity and correctness after the optimization of bypass switch closing. Optimization program has been widely implemented in the Yun-Guang and Nuozhadu Ultra HVDC controlling and protection system. The optimization scheme has played an active role in the end of project commissioning process, and the thyristor failure caused by the island bipolar bl0ck test never occurred.

关 键 词：孤岛运行方式 晶闸管 控制保护 双极闭锁 仿真 

分 类 号：TM73[电气工程—电力系统及自动化]