摘要
湘潭电厂二期扩建2×600 MW超临界机组,其电气主接线具有突出的特点:两发电机-变压器组为单元接线,发电机出口装有CCB,2回500kV出线为内桥接线,将来可以过渡到3/2开关接线;取消启/备变,也不设停机变;每台机组设1台高厂变和1台公用变,2台机组的高厂变和公用变互为备用;高厂变和公用变均改为无载调压。电气二次回路保护装置及运行方式亦作相应调整。
The main electrical wiring of the Xiangtan Power Plant 2×600 MW supercritical unit has such characteristics as unit connection for generator - transformer set, generator outlet equipped with GCB, inter - bridge connected 500 kV double - circuit outlet that can be modified to 3/2 switch connection in the future; eliminating start/backup and shutdown transformers. Each unit is equipped with a HV auxiliary transformer and common transformer that are served as backup for each other. The HV auxiliary transformer and common transformer are no - load tap - changers. The protection and operation modes of the secondary electric circuit are adjusted accordingly.
出处
《电力建设》
2007年第1期36-38,共3页
Electric Power Construction
关键词
600MW超临界机组
电气主接线
高厂变
公用变
无载调压
600 MW supercritical unit
main electrical wiring
HV auxiliary transformer
common transformer
no - load tap - changer
