CAJ | 학술논문

针对中国典型的长距离输电型互联电网———西北电网，采用时域仿真分析并结合电网物理特性的定性分析方法，基于不同水平年多个运行方式下大量仿真计算，进行西北电网失步振荡中心在不同水平年、不同故障扰动条件下分布情况的对比分析，论述了在该类型电网中失步振荡中心分布的特点、影响因素和一般特征。在此基础上，针对失步断面近区发电机组受振荡能量冲击，与振荡中心两侧振荡机群均失去同步的情况及其对常规解列措施的影响，提出了在确保主失步振荡机群合理解开前提下，按失步断面解开后形成的末端电网恢复效果原则选择解列断面或加配其他措施的改进解列措施。
침대중국전형적장거리수전형호련전망———서북전망，채용시역방진분석병결합전망물리특성적정성분석방법，기우불동수평년다개운행방식하대량방진계산，진행서북전망실보진탕중심재불동수평년、불동고장우동조건하분포정황적대비분석，논술료재해류형전망중실보진탕중심분포적특점、영향인소화일반특정。재차기출상，침대실보단면근구발전궤조수진탕능량충격，여진탕중심량측진탕궤군균실거동보적정황급기대상규해렬조시적영향，제출료재학보주실보진탕궤군합리해개전제하，안실보단면해개후형성적말단전망회복효과원칙선택해렬단면혹가배기타조시적개진해렬조시。
Based on time domain simulation and grid physical qualitative analysis,a large amount of simulation calculation in multiple operation modes of different years is performed on China”s northwest power grid,which is a typical long distance transmission system.The out-of-step oscillation centers distribution,influencing factors and characteristics are summarized. For generators suffering oscillation energy impact from the islanding near the oscillation center and failure to keep synchronization with either oscillated generator group,measures to improve islanding operation are taken to ensure rational islanding of the major out-of-step units prior to choosing the islanding cross section on the principle of the recovery effect of the islanded sub-grid groups.