同步电机参数测量的若干问题探讨

Study on the Parameters Measurement of Synchronous Machine

同步电机参数的适当选取对其运行性能有相当大的影响 ,不论是由设计计算还是由各类测量方法测定 ,所得参数均希望有一个较精确的结果。参数通常分为两大类 :一类是同步电机的等效电路参数 ;一类是时间常数与电抗。由两类参数所计算出的同步电机各种运行特性应该有一致的结果。通过研究分析同步电机的频率特性曲线 ,提出由试验测定或计算得到的同步电机参数 ,是否正确 ,除采用其它方法检验外 ,还应通过由两类参数求得的频率特性曲线的相互比较来检验 ,若两者的频率特性曲线重合或近似 ,可认为参数是准确的 ,否则就有一定的误差存在。提出了一些参数测量准确性的判据 。

The performance of synchronous machine was serious affected by its parameters.The parameters should be precise through design calculation or different survey methods. They were usually divided to two types: one was equivalent circuit parameters, another time constants and reactances. All the performances of synchronous machine, calculated by two kinds of parameters, must showing no difference. By studying the frequency-response characteristic curves (FRCC) of synchronous machine, we regard as the correctness of parameters, through design calculation or different survey methods, must be tested not only by other methods, but also by comparing FRCC sketched by two sorts of parameters. If two kinds of FRCC were coincided or approximation, the parameters were set down as correct, or else some errors exist. Some criterions were concluded about the correctness of parameters measurement, and also as merits of quantitative analysis.