兴义电厂SID-2CM同期装置的整定计算

Setting calculation of the SID-2CM autonmtic quasi -synchronizing device in Xingyi Power Plant

对兴义电厂1号机组采用发电机机端PT作为待并侧PT、220kV母线阻作为系统侧PT进行同期控制时，因1号主变变比不是220kV／20kV引起两组PT在同样的一次电压下二次电压不相等的原因进行了分析，之后根据SID-2CM自动准同期装置的压差计算公式给出了其“系统侧PT二次额定电压”Ux2n和“待并侧PT二次额定电压”Uj2n两个定值的的整定计算原则。

This paper analyzes the reasons of the generator potential transformer secondary voltage is not equal to 220 kV bushar potential transformer secondary voltage even if the two groups of potential transformer at the same primary voltage, which generator potential transformer, as quasi - synchronization side, and 220 kV busbar potential transformer, as network, are synchronizingly controlled. And then introduce the setting - calculating rules of the generator potential transformer rated secondary voltage＇＆ the busbar potential trans-former rated secondary voltage＇in the SID-2CM automatic quasi -synchronizing device.