The influence of HVDC converter controls on the mode damping of sub-synchronous oscillations (SSO) in a AC/DC power system is investigated in this paper by using eigenvalue analytical method.
采用特征值分析法研究交直流电力系统中HVDC换流器控制对次同步振荡（SSO）模态阻尼的影响。
For some operating conditions, a synchronous generator with a rectifier and back-EMF load maybe exhibit low-frequency oscillations when the system parameters do not match.
同步发电机整流带反电动势负载时，当系统参数不匹配，在一定工况下，可能出现低频振荡。
Because all of these oscillations come from the same source, the are synchronous.
所有这些振荡来源相同，所以是同步的。
Because all of these oscillations come from the same source, the are synchronous.
所有这些振荡来源相同，所以是同步的。
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