电动机综合负荷模型经过传输元件的折算公式

A Composite Induction Motor Load Model for Conversion Between Different Voltage Sides Through the Transmission Element

在计及传输元件阻抗和负荷阻抗的条件下,从理论上推导了电动机综合负荷模型经过传输元件向高压侧折算的公式。该等值模型没有改变原来负荷模型的模型结构,只需对部分参数进行适当调整,即可等值描述接于高压母线的动态负荷特性。折算公式为电力负荷建模提供了理论基础,算例结果验证了折算公式的正确性和准确性。同时,从定性和定量2个角度,分析了折算前后参数的变化规律。

With the impedance of both the transmission element and load taken into account, the formula for the conversion of the composite induction motor load model from the low voltage side to higher voltage side is derived. The structure of the equivalent load model is the same as the original one, with only part of the parameters modified to describe the dynamic load characteristics on the high voltage side. The formula can provide a theoretical basis to load modeling methodology. The simulation results have verified the correctness and accuracy of the formula and described the parameter variation before and after conversion qualitatively and quantitatively.