大容量抽水蓄能电站高压同期的接线特点

大容量抽水蓄能机组的同期点可以设在发电电动机侧（低压同期方式）也可设变压器高压侧（高压同期方式）。根据对采用高压同期的适用场合及由此引起的主变压器起动电站分流，厂用与励磁及起动电源引接，起动回路器配置等问题的分析，认为大型抽水蓄能电站采用高压同期方式可大大简化了房内土建结构和电气设备布置，再从经济比较表明，高压侧电压为３４５ｋＶ及以下时，采用高压侧同期较为经济，当高压侧电压为４００ｋＶ及以上时，则

Characteristics of high voltage synchronizing connection for large scale pumped-storage power plant

The synchronous point in large scale pumped-storage power generating unit could be set in the side of generator-motor (low voltage synchronizing mode)or in the high-voltage side of main transformer(high voltage synchronizing mode). On the basis of the analysis on the applicable conditions of high voltage synchronizing and some accompanying problems, such as starting current shunt to the main transformer, the power supply connection of theStation service power and excitation and starting system,and the arrangement of circuit breakers in starting circuit,it is considered that, for the large--scale pumped--storage power plant, the application of high voltage synchronizingmode could greatly simplify the civil structures and electrical equipment arrangement in the powerhouse. And it isalso showed from the economic analysis that when the voltage value in the high voltage side is 345 kV or less, it ismore economic to adopt the high voltage synchronizing mode. When the voltage value in the high voltage side is 400kV or more, then it 'is comparatively economic to adopt the low voltage synchronizing mode.