大型发电机励磁系统功率柜均流方式研究及实践

Research and Practice on Current Sharing Mode of Power Cabinet in Large Generator Excitation System

励磁系统是保证发电机和电力系统安全、稳定运行的重要系统,整流装置各分支输出电流的均衡性是励磁系统的重要运行指标,关系到励磁系统的运行效率和安全裕度。大型发电机励磁系统功率柜多,影响均流系数的因素更为复杂。本文重点介绍了物理均流和智能均流方法,并对其优劣进行了对比分析,同时还介绍了某电站励磁系统功率柜的均流实践,为大型励磁系统均流提供了技术分析方法。

Excitation system is an important system to ensure the normal and stable operation of generator and power system.The output current balance of each branch of rectifier device is an important operation index of excitation system,which is related to the operation efficiency and safety margin of excitation system.There are many power cabinets in large excitation system,and the factors affecting the current sharing coefficient are more complex.This paper focuses on the physical current sharing and intelligent current sharing methods of large-scale excitation system,compares and analyzes their advantages and disadvantages,and introduces the process of current sharing practice of excitation system in a large-scale power station,so as to provide technical analysis and reference methods for the current sharing of large-scale excitation system.