考虑电压相位的实用负荷模型参数辨识

Parameters identification of practical load model with voltage phase considered

目前电力系统感应电机负荷模型一般采用实用模型,参数辨识时仅采用电压有效值,而忽略电压相位和交轴电压分量.分析忽略交轴电压分量所需的条件,发现该条件通常难以满足.并提出考虑电压相位和交直轴电压分量的负荷建模实用模型,用于电力负荷参数辨识.不同故障下的算例结果表明,该实用模型比仅考虑电压有效值的实用模型,能更精确地辨识出负荷模型参数.

The load model of induction motor is usually described by a utility model, in which the voltage phase and q-axis voltage component are neglected due to measurement reasons. The conditions for neglecting the q-axis voltage component were analyzed in this paper, and the results showed that the conditions can＇t be satisfied in most cases. Then the model with both d-axis and q-axis voltage components considered were proposed to identify the road parameters. Simulation results showed that the proposed model can achieve more accurate parameter comparing to the models with the voltage phase and q-axis voltage component neglected.