感应电动机负荷的动态特性分析

正确认识电力系统动态负荷的物理机理特性是对电力系统综合负荷特性进行准确建模的关键。该文首先通过对电力系统负荷中主要动态负荷元件——感应电动机的机理特性的深入分析和仿真计算，指出能描述感应电动机动态响应特性的性能指标和参数。然后基于感应电动机的特征值分析，定义电动机机械特征模式的衰减率，提出一种根据转子绕组特征模式阻尼比和机械特征模式衰减率比较不同电动机负荷稳定性能的有效方法。这些结论的提出对准确把握电力系统所有负荷的整体动态特性，以及对其进行综合负荷建模都有着重要的意义。

Dynamic Characteristics Analysis of Induction Motor Loads

It is very important to correct explain the physical mechanism characteristics of power system dynamic loads for accurately modelling the synthetic characteristics of system loads. Firstly, physical mechanisms of induction motors as the main dynamic loads in power systems were investigated deeply in this paper，from which several critical performance indexes and parameters were obtained to globally describe the dynamic responses of the induction motor loads by simulation analysis. Secondly, based on the eigen analysis of induction motos., attenuation rate of the mechanical eigen mode of induction motor was defined, and an effective algorithsm was presented to compare the stability behaviours of different induction motor loads. These conclusions are the key points in grasping the comprehensive dynamic characteristics of all the power system loads and obtaining the thynthetic load model.