摘要
总结归纳了云广特高压直流工程中换流变分接头切换控制模式分为定角度控制模式、定Udio控制模式和阀组跟随控制模式三种,逐一深入分析了上述三种控制模式具体的控制方法和实现过程。针对云广系统在试运行期间出现的极2不能正常解锁的故障,通过计算分析得出是由于换流变分接头控制问题导致的,指出云广系统实际运行中当前的分接头切换控制模式存在会使换流变充电时的励磁涌流过大的问题,这需要在后续的调试中进一步讨论解决。
The paper summarizes three switching control modes for tap changer of converter transformer in Yun-Guang UHVDC power transmission system,which includes constant firing angle control mode,constant Udio control mode and valve group following control mode.Then the control method and the control process for the three control modes above mentioned are analyzed one by one.The fault that pole 2 can＇t be deblocked during Yun-Guang UHVDC system trial operation results from tap changer switching control.At last,it points out that current control mode of converter transformer tap changer in Yun-Guang UHVDC system can result in an over inrush current when the converter transformer is energized,which should be discussed further in the subsequent testing.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第20期205-208,共4页
Power System Protection and Control
关键词
特高压直流工程
换流变
分接头切换
控制模式
试运行
UHVDC project
converter transformer
tap changer switching
control mode
trial operation
