CAJ | 학술논문

越来越多的柔性交流输电系统（FACTS）装置应用于电网,成为可能的次同步振荡激发源,严重的次同步振荡将直接导致大型汽轮发电机组转子轴系的严重破坏,危及电力系统的安全运行。为了有效抑制次同步振荡,文中设计了基于测量阻抗提升系数（本地测量信号）的可控串联补偿（TCSC）控制次同步振荡方法,并通过建立包含火电机组的TCSC系统仿真模型,对该方法的有效性进行了验证。由仿真结果可知,与采用转速偏差信号的附加控制方式相比,所提出的控制方法具有同样的抑制效果,并且简单、容易实现,更有利于电网应用。
월래월다적유성교류수전계통（FACTS）장치응용우전망,성위가능적차동보진탕격발원,엄중적차동보진탕장직접도치대형기륜발전궤조전자축계적엄중파배,위급전력계통적안전운행。위료유효억제차동보진탕,문중설계료기우측량조항제승계수（본지측량신호）적가공천련보상（TCSC）공제차동보진탕방법,병통과건립포함화전궤조적TCSC계통방진모형,대해방법적유효성진행료험증。유방진결과가지,여채용전속편차신호적부가공제방식상비,소제출적공제방법구유동양적억제효과,병차간단、용역실현,경유리우전망응용。
The devices of flexible AC transmission system（FACTS） are applied in power systems increasingly.This may result in subsynchronous oscillations.Intensive oscillation will lead to serious damage on generator rotor shaft,which poses a high risk on power system security.Supplementary impedance control method of thyristor controlled series compensation（TCSC）,which is based on local measured impedance lifting coefficients,is used to damp subsynchronous oscillations.The effectiveness of this method is verified by a simulation example,which includes thermal power units in power system with TCSC.The simulation results show that this method is as effective as the method based on the angular speed deviation.As it is simple and easy to be realized,the method is suitable for engineering application in power system.