考虑励磁和调速器系统的水电机群等值建模  

An equivalent modeling for hydropower generator group considering excitation and governor system

作　　者：章杨帆 刘涤尘[1] 梁姗姗[1] 彭昌勇[2] 

机构地区：[1]武汉大学电气工程学院,湖北武汉430072 [2]湖北省电力公司经济技术研究院,湖北武汉430062

出　　处：《武汉大学学报（工学版）》2017年第2期245-250,共6页Engineering Journal of Wuhan University

基　　金：国家电网公司重点科技项目(编号:52153813020D)

摘　　要：对中小水电机群进行等值建模是对含水电的电网进行动态分析时的一种实用方法,励磁和调速器系统对等值模型的精度具有突出影响.提出了含励磁和调速系统的中小水电机群等值建模方法,该方法以传统的基于同调法的水电机群等值模型为基础,考虑励磁与调速器系统的等值,采用PLPF法得到励磁系统的等值参数,采用加权平均法得到原动机及调速器的等值参数.算例表明该方法在动态过程的误差较小,能够提高仿真精度.在此基础上,进一步分析了励磁和调速器系统对动态特性的影响.Building an equivalent model of mid-small sized hydropower generator group is a practical method carried out for dynamic analysis of water electricity grid; excitation and governor system have prominent influences on the precision of the equivalent model. This paper presents a method to build a dynamic equiv- alent model of hydropower generator units containing excitation and governing system. The method uses traditional equivalent model of hydropower generator group which is based on homology method as the foundation, and considers the equivalence of excitation and governor system it uses PLPF method to get the equivalent parameters of excitation system and weighted average method to get the equivalent parame- ters of prime mover and speed governor. Numerical examples show that the error of the method in dynamic process is small; and it can improve the simulation accuracy. On this basis, further simulations are made to analyze the effect of excitation and governor system on dynamic characteristics.

关 键 词：水电机群 动态等值 励磁系统 PLPF法 调速器 

分 类 号：TV734[水利工程—水利水电工程]