暂态稳定分析典型励磁模型仿真研究  

Simulation of typical excitation models for power system transient stability analysis

作　　者：张立霞 王高山 汪友华[2] 崔建华 张家安[4] 

机构地区：[1]正德职业技术学院电子工程系,江苏南京211100 [2]河北工业大学电气与自动化学院,天津300130 [3]上海ABB工程有限公司,上海200000 [4]南瑞继保电气有限公司,江苏南京211100

出　　处：《电力自动化设备》2008年第1期77-80,85,共5页Electric Power Automation Equipment

摘　　要：在电力系统运行中,发电机励磁系统的电压调节特性和强励性能对整个系统的稳定运行有重要影响,为深入认识该特性和与之相关的影响因素,以IEEE Std 421.5-1992标准推荐的交流励磁机励磁系统和静止励磁系统为基础,构建了单机-无穷大网络数值模型和励磁控制数值模型,交流励磁机励磁系统主要包括AC1～AC6 6种模型,静止励磁系统主要包括ST1～ST3 3种模型。励磁系统主要考察发电机在额定转速解裂运行方式下的90%额定电压起励特性、10%阶跃响应特性和在并网额定运行方式下三相短路故障后的励磁电压动态调节特性,比较了不同励磁模型在相同工况下的控制品质和对系统稳定运行的影响,分析了励磁强励特性的影响因素。The dynamic characteristics and forced excitation performances of generator excitation system have profound influence on the stability of power system operation. To investigate its characteristics and relevant influencing factors ,a simulation system comprising a numerical single -machine infinite- bus network model and varies numerical excitation control models is built based on the alternating current exciter-excitation system models from AC1 to AC6 and the static excitation system models from ST1 to ST3,which are recommended by IEEE Std 421.5-1992. The responses to 90 % rated voltage build-up and to 10 % rated voltage step in rated speed and open-loop operation mode are simulated,as well as the dynamic regulation characteristics after three-phase fault in rated speed and close-loop operation mode. The control performances of different excitation models under same operating conditions and their influences on system stability are compared and the influencing factors of forced excitation characteristics are analyzed.

关 键 词：电力系统 发电机 励磁模型 电力系统仿真 

分 类 号：TM761.11[电气工程—电力系统及自动化]