The most effective method of damping the oscillation is to install power system stabilizer (PSS) and direct current modulation (DCM). But PSS (DCM) designed to a certain mode will produce bad effect to other modes.

• 抑制低频振荡最有效的方法是装设电力系统稳定器(PSS)和直流附加控制器(DCM),但针对某一振荡模式而设计的PSS(DCM)会对其它模式产生负作用而破坏系统稳定性。