电力系统负荷模型的建立

本文提出了电力系统负荷特性是一个具有零均值白噪声的随机系统。并用三组现场实测数据辨识出模型的良好重现性,表明了总体测辨法是可行的。 本文还提出了参数辨识不稳定问题及其解决方法。比较了在东北网分析计算中采用实测负荷模型和常规负荷模型的结果。

Power System Load Modelling and It's Verification

After analyzing human behaviour and dealing with the data measured from field, this paper describes power system load caracteristics as a stochastic system, in which system noise is a zero mean gaussian random process. The repeatability of the statistic rules is shown by three measurements in Hushitai substation of Northeast Network-Nonstability of load model parameters in identification is defined and resolved- Three dynamic load model are identified from Hushitai data and called HST models.The comparison of transient stability studies on 459-bus Northeast Network between two kinds of load model: 70% motor plus 30% constant impedance and HST model, is carried out-This paper emphasizes the necessity of the power system transient simulation verification, otherwise the load model cannot be verified. Three examination methods are given, among which field test is put in first place.