基于改进ucosφ的电网振荡解列判据研究  

Research on Splitting Criterion Based on Modified ucosφ

作　　者：杨健[1] 党杰[2] 廖清芬[1] 唐飞[1] 王乙斐[1] 涂炼[1] 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072 [2]华中电网有限公司,湖北武汉430072

出　　处：《陕西电力》2013年第9期1-4,共4页Shanxi Electric Power

基　　金：国家高技术研究发展计划资助项目(863计划编号:2011AA05A119);国家电网公司大电网重大专项资助项目课题(SGCCMPLG029-2012)

摘　　要：针对传统的ucosφ解列判据,研究其有效性以及局限性,基于等值两机系统,指出发电机相对功角在0°或者360°附近时刻时,ucosφ并不能正确反映振荡中心的电压,ucosφ解列判据容易发生误判。此时,需要对判据进行适当的修正处理,可以较为准确地捕捉到失步系统的振荡中心所在位置,对于防止装置误判、事故后的解列控制,以及减少由于解列造成的大电网故障损失具有重要意义。基于四机两区域系统的仿真验证了该方法的准确性和有效性。The paper explores the effectiveness and boundedness of traditional splitting criterion ucosφ. Based on the equivalent two- machine power system, it is pointed out that when generator power angle δ is near 0° or 360°, ucosφ cannot show the voltage of the oscillation center and the result of the criterion may be a misjudgment. Now the criterion should be revised appropriately to capture the location of the oscillation center in the tie lines of out-of-step splitting system with relative accuracy. On the one hand, it is vital to prevent the misjudgment of the criterion. On the other hand, it is also significant to the control of the splitting and reducing the loss. In the end, the simulation is given in the four machine two regional system which proves the correctness and effectiveness of this method.

关 键 词：解列判据ucosφ 振荡中心 

分 类 号：TM762[电气工程—电力系统及自动化]