电力系统稳定器试验在发电厂中的应用

Application of Power System Stabilizer Test in Power Plant

摘要: 电力系统低频功率振荡是电力系统中的一种有功功率振荡，系统振荡的弱阻尼也不能达到电力系统安全稳定运行的要求，发电机的转子和电网的低频振荡可以通过电力系统稳定器来削弱，一旦发电机的有功达到一个可调值和发电机的电压低于一个可调范围时，就可以投入PSS。运行操作人员在需要投入电力系统稳定器时，可以不必进行任何的调节，亦可以在任何时候手动退出，而如果发电机在运行时的电压和有功超过了定值、或是在发电机解列时也都可以自动退出。PSS的投入/切除在HMI界面的“系统控制”菜单中，也可以在HMI界面下方直接选择。为了取得PSS对低频振荡的抑制效果，主要可以利用对励磁系统相频特性的测量和PSS参数的整定来实现。

Abstract: The low-frequency power oscillation is a kind of active power oscillation in power system. The sys-tem oscillation appears weak damping which is not meet the requirements of stable operation of power system. Generator rotors and power grids can reduce Low-frequency oscillations through power system stabilizers, and once the generator is active at tone contours and the generator volt-age is lower than a tunable range, PSS can put be in. The operator does not need to make any ad-justments to the power system stabilizer, and the PSS can be manually removed at any time and can be automatically removed if the active power and voltage of the generator exceed the set values or the generator is unemployed. The input/removal of PSS is in the “System Control” menu of the HMI interface, or can be selected directly under the HMI interface. In order to obtain the inhibition effect of PSS on low-frequency oscillation, the phase-frequency characteristics and PSS parameters of the excitation regulator are measured and adjusted.