黑启动中的自励磁判据及仿真

Self-Excitation Criterion in Black-Start and Its Simulation

黑启动的过程,就是全网停电后电网系统的恢复过程.由于这一过程中的运行设备和运行参数在某些情况下,与电力系统正常运行状态有所不同,因此可能会出现如自励磁等影响系统安全稳定恢复运行的现象和问题.从适用于黑启动快速这一特点出发,在已有的方法中选择了一种简单的近似方法来作为黑启动研究中自励磁产生与否的判据,从自励磁现象本质出发进行了阐述,并对水轮机组自励磁产生的暂态过程进行了仿真计算.

Black-start is the process of the bulk power system restoration. Many problems such as generator self-excitation problem may come out,and result in unsafe restoration process,since they are much different from the normal. This paper chooses a simple and approximate method from several existed methods of self-excitation study to present. Based on generator self-excitation theory and the characteristics of black-start,we choose this simple method to be the criterion of generator self-excitation problem in black-start. Later,simulation of hydraulic generator self-excitation study is given.