摘要
随着区域电网逐渐互联,系统发生在1 Hz以下的低频振荡所占比例越来越高,并且发生了发电机励磁系统投入电力系统稳定器(PSS)后在一些运行方式下产生负阻尼的现象。针对目前常见PSS试验方法不能对低频段振荡的抑制效果进行验证,提出了在机端电压上叠加正弦扰动信号的试验方法。现场试验验证表明,该试验方法合理有效。
Along with the interconnection of regional power grid,the percent of low-frequency oscillations below 1Hz is increasing.And sometimes negative damping phenomenon can happen after PSS installed in generator＇s excitation system under certain operation mode.This paper points out that normal test methods of PSS cannot verify the effect of suppressing low-frequency oscillations,and gives a test method of superposing a sinusoidal perturbation signal on generator＇s terminal voltage.Results of field tests show that this method is reasonable and effective.
出处
《江苏电机工程》
2012年第1期31-33,共3页
Jiangsu Electrical Engineering
关键词
电力系统稳定器
低频振荡
励磁系统
power system dynamic stability
low-frequency oscillation
excitation system
