基于非对称扰动的负荷建模新方法及工程应用  

New Load Modeling Approach During Asymmetric Disturbance and Its Engineering Application

作　　者：徐伟华[1] 艾芊[1] 陈陈[1] 王伟[2] 凌晓波[2] 刘蓓[2] 王冲[2] 

机构地区：[1]上海交通大学电子信息与电气工程学院,上海市200240 [2]上海市电力公司电力调度通信中心,上海市200122

出　　处：《电力系统自动化》2009年第13期27-31,共5页Automation of Electric Power Systems

基　　金：国家自然科学基金重点项目(90612018);国家自然科学基金重大项目(50595412)~~

摘　　要：影响总体测辨法广泛应用的主要障碍在于电力系统中自然扰动所提供的有效数据严重不足。这是因为目前总体测辨法只能从三相对称扰动数据中辨识出负荷模型,而大多数电力系统故障是非对称的,人工大扰动试验又难以得到许可。文中提出基于非对称扰动的负荷动态模型建模方法。通过将感应电动机Park方程直接用于动态过程求解,解决了负荷动态模型辨识源数据严重不足的问题;通过将改进的免疫算法用于模型参数优化,解决了参数辨识过程中的不收敛现象。最后讨论了上海电网实测负荷模型对线路极限切除时间的影响。The main obstacle to the wide application of the measurement-based load modeling approach （MBLMA） lies in the serious insufficiency of the effective data provided by disturbance normally occurring in a power system. This is because the currently used MBLMA can only identify the load parameters from three-phase symmetric disturbance. But most of the faults occurring in a power system are asymmetric, and it is hard to get permission to do field test. An approach to load dynamic modeling during asymmetric disturbance （LMAD） is proposed. The problem of insufficient data is solved by applying Park＇ s equations in solving the induction motor＇ s dynamic process. And the problem of divergence in MBLMA is solved with the modified immune algorithm in the optimization of the model parameters instead of the least square estimation （LSE） method. Finally, the identified load model＇s influence on the critical clearing time （CCT） in Shanghai Power Grid is discussed.

关 键 词：负荷建模 非对称扰动 非对称扰动的负荷建模(LMAD) 总体测辨法 

分 类 号：TM714[电气工程—电力系统及自动化]