CAJ | 학술논문

针对一种基于STATCOM的次同步阻尼控制器（ GTSDC），对其工作原理与系统构成及GTSDC接入系统后可能存在的问题进行了分析，同时借助仿真软件，系统研究了GTSDC接入对电力系统的影响因素。研究结果表明， GTSDC接入对机组电压和电流的质量基本无影响；可能引发的变压器直流偏磁问题不严重；所产生的次同步电流相对机组容量有限；电网的短路电流变化很小，证明次同步阻尼控制器的接入不会对电网、厂用电系统造成不利影响。
침대일충기우STATCOM적차동보조니공제기（ GTSDC），대기공작원리여계통구성급GTSDC접입계통후가능존재적문제진행료분석，동시차조방진연건，계통연구료GTSDC접입대전력계통적영향인소。연구결과표명， GTSDC접입대궤조전압화전류적질량기본무영향；가능인발적변압기직류편자문제불엄중；소산생적차동보전류상대궤조용량유한；전망적단로전류변화흔소，증명차동보조니공제기적접입불회대전망、엄용전계통조성불리영향。
Suppression measures for sub-synchronous oscillation of generators has recently become a hot research, and the theory has been verified by engineering practices in some power plants.This paper studies an damping con-troller for sub-synchronous oscillation ( GTSDC) based on STATCOM.It analyzed its structures, operational prin-ciples, the problems and influences that the sinmulation software PSCAD may have after it hand been connected to the system.The results show that:GTSDC does not affect the quality of the unit voltage and current;DC magnetic bias in transformer is not serious, the ratio of sub-synchronous current by GTSDC to unit capacity is small, and short-circuit current in power grid changes very little.All of these prove that: GTSDC will not bring out adverse effects for power grid and auxiliary power.