基于PMU多点测量数据的中小水电机群等效模型辨识  

Identification of Dynamic Equivalence Model of Hydro Generator Unit Group Based on Multi PMU Data

作　　者：彭昌勇[1] 夏鑫[2] 周建中[2] 朱文龙[2] 杜治[1] 

机构地区：[1]国网湖北省电力公司经济技术研究院,湖北武汉430077 [2]华中科技大学水电与数字化工程学院,湖北武汉430074

出　　处：《水力发电》2015年第6期106-109,117,共5页Water Power

基　　金：国家电网公司科技项目(52153813020D)

摘　　要：针对传统在线辨识等效模型存在多解的问题,提出了一种改进的辨识策略,利用联络线与研究系统内部多节点的动态过程作为目标函数,不仅保证了系统内外部各节点的动态过程在等效前后一致,也解决了辨识模型多解问题。同时,针对水电机组运行工况转换频繁对辨识实时性要求较高的特点,提出了一种改进的粒子群优化(PSO)算法,提高了辨识效率。最后通过系统仿真算例验证,证明该方法能有效解决多解的问题,并提高了辨识效率。For solving the problem of multi-solution of traditional dynamic equivalents based on online identification, an improved identification method is proposed herein. The dynamic data of the tie line and internal points is proposed as the objective function in above method, which not only ensures the consistency of dynamic process of internal and external points before and after equivalence, but also solves the problem of multi-solution. As the frequent operation condition conversion of hydropower system, there is an urgent need to improve the identification performance. So an improve PSO method is also proposed. The simulation result indicates that the proposed method can overcome the problem of multi-solution and has higher efficiency in identification.

关 键 词：电力系统 动态等值 改进PSO 水电机组 参数辨识 

分 类 号：TM712[电气工程—电力系统及自动化]