This paper aims to compare two strategies for damping low-frequency electromechanical oscillations in multi-machine power systems through Static Synchronous Compensators (STATCOM) with a multi-band controller. STATCOM is represented by a controllable voltage source behind an impedance and the multi-band controller acts as a power oscillation damper that modulates parameters of the voltage source in the transient period. In the first strategy, the multi-band controller acts on the voltage-control loop through the voltage modulation. In the second one, the controller acts on the real power-control loop to modulate the phase angle of the voltage source. The coordinated design of multi-band controllers and power systems stabilizers is performed through an optimization approach taking into account several operation conditions.

本文旨在比较两种通过静态同步补偿器（STATCOM）和多频带控制器抑制多机电源系统中低频机电振荡的策略。STATCOM由位于阻抗后面的可控电压源表示，并且多频带控制器用作功率振荡阻尼器，可在瞬态周期中调制电压源的参数。在第一种策略中，多频带控制器通过电压调制作用在电压控制环路上。在第二个中，控制器作用在有功功率控制环路上，以调制电压源的相角。多频段控制器和电力系统稳定器的协调设计是通过考虑几种操作条件的优化方法来执行的。