Dynamic equivalent method of interconnected power systems with consideration of motor loads  

作　　者：ZHOU HaiQiang1,JU Ping1,YANG Hui1 & SUN Ran2 1 Electrical Engineering School,HoHai University,Nanjing 210098,China 2 Henan Power Dispatching & Communication Center,Zhengzhou 450052,China 

出　　处：《Science China(Technological Sciences)》2010年第4期902-908,共7页中国科学（技术科学英文版）

基　　金：supported by the National Scientific Funds for Outstanding Young Scientists of China (Grant No 50725723);National Natural Science Foundation of China (Grant No 50977021)

摘　　要：The existing equivalent methods usually only deal with static load models and neglect the dynamic characteristics of loads such as induction motors.This paper presents a dynamic equivalent method which considers motor dynamics.At first,the clustering criterion of motor loads is given.The motors with similar dynamic characteristics are classified into one group.Then,reduction of motors in the same group is carried out.Finally,parameters of the equivalent motor are calculated and the equivalent system is thus obtained.This aggregation method is applied to the New England system of 39-buses and 10-generators.Simulation results show that the equivalent system retains the dynamic performance of the original system with good accuracy.Compared with the 1-motor equivalent scheme,the 2-motor equivalent scheme can improve equivalent precision effectively.The existing equivalent methods usually only deal with static load models and neglect the dynamic characteristics of loads such as induction motors.This paper presents a dynamic equivalent method which considers motor dynamics.At first,the clustering criterion of motor loads is given.The motors with similar dynamic characteristics are classified into one group.Then,reduction of motors in the same group is carried out.Finally,parameters of the equivalent motor are calculated and the equivalent system is thus obtained.This aggregation method is applied to the New England system of 39-buses and 10-generators.Simulation results show that the equivalent system retains the dynamic performance of the original system with good accuracy.Compared with the 1-motor equivalent scheme,the 2-motor equivalent scheme can improve equivalent precision effectively.

关 键 词：power system DYNAMIC EQUIVALENT LOAD model INDUCTION MOTOR 

分 类 号：TM711[电气工程—电力系统及自动化]