摘要
基于串联双阀组的解锁/闭锁准则,详细研究了特高压直流输电系统各种工况下的解锁/闭锁过程及其控制策略。解锁极的第一个阀组,同时解锁极的双阀组,闭锁极的第二个阀组及同时闭锁极的双阀组采用与常规直流输电系统一致的控制策略;对于串联双阀组特有的第二个阀组解锁和第一个阀组闭锁,设计了新的控制策略。不建议在站间通信失败时解锁极的第二个阀组;极闭锁后建议断开其旁路开关以防止不平衡电流流过停运极。
Based on the design criteria for blocking/de-blocking of valve groups,this paper mainly studies the de-blocking/ blocking sequence and control strategies for groups under different circumstances.De-blocking the first group of a pole,simultaneously de-blocking both groups of a pole,and blocking the first group of a pole,simultaneously blocking both groups of a pole can be done the same way as that in a conventional bipolar HVDC scheme.The special coordinated sequence and control strategies for de-blocking the second group of a pole and blocking the last group of a pole are designed.In case of without telecom,de-block of second group of a pole is not recommended.In order to avoid unnecessary spill currents into the shutdown pole,the bypass switches of the blocked group is proposed to be left open.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第6期84-87,共4页
Power System Protection and Control
