励磁系统参数测试及其分析

Excitation System Parameter Test and Its Analysis

对励磁系统主要参数的要求及其测试中的问题进行了分析。介绍了采用微机型多功能测试仪测试励磁特性曲线、发电机空载和负载阶跃响应等，从而计算励磁控制系统稳态和暂态增益，以及电力系统稳定器对阻尼低频振荡的影响。该仪器可打印输出动态过程中各量的响应曲线，可同时实测励磁电压、电流，发电机电压、电流，计算出有功、无功功率；测试简便、精度高，可满足建立励磁系统数据库的要求，为电力系统稳定计算提供可靠的励磁参数。

This paper analyzes the requirement on excitation system parameters and problems in measurement; also introduces excitation characteristic curves, generator no load and load staggering measurement by micro computor based multi function testing instrument, for calculating excitation control system static and transient gains and the influence of power system stabilizer on damping low frequency oscillation. This instrument can print out the overate response curve, measure practical excitation voltage and current, generator voltage and current as well as calculate active and reactive power simultaneously.