摘要
国内抽水蓄能电站建设速度明显加快,控制保护设备国产化研究也取得重大突破,相继攻克了静止变频器和机组保护等重要设备的关键技术,研制的产品在300MW级大型抽水蓄能电站上得到推广应用。本文首先介绍了静止变频器关键技术,包括转子初始位置检测方法、SFC与励磁系统的协调控制、SFC变流桥差动和输出变压器差动保护方法。然后,针对国外保护存在的不足,介绍了国内抽水蓄能机组保护的研究进展和解决方案,主要包括运行工况可靠判别方法、变频启动过程主保护实现方法、定子接地保护优化配置等。最后,介绍了静止变频器和机组保护的国产化应用情况,展望了市场应用前景。
More and More pumped-storage energy power plants are under construction in China,and the key technology of control and protection,including static frequency converter and generator protection,has been tackled in these years,and related equipments have been applied in large pumped-storage power stations. This paper introduced three key technology of static frequency converter,including initial rotor position detection method,coordinated control strategy of SFC and excitation system,SFC variable current bridge differential protection and output transformer differential protection. Then,it indicated research progress and solutions concerned with the problems of foreign pumped-storage unit protection equipments,such as unreliable discrimination of operation condition,none differential protection in the initial stage of start-up,unreasonable configuration of stator winding fault protection,and so on. At last,it introduced the application of the related products,and looked forward to the prospect application.
出处
《水电与抽水蓄能》
2016年第4期3-9,共7页
Hydropower and Pumped Storage
关键词
抽水蓄能机组
静止变频器
转子初始位置检测
变流桥差动保护
定子接地保护
运行工况
电流不平衡保护
pumped-storage unit
static frequency converter
initial rotor position detection
SFC variable current bridge differential protection
stator winding fault protection
operation condition
current unbalance protection
