利用PV曲线评估感应电机负载及电压稳定性

L.M. Vargas, J. Jatskevich, J. Martí
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引用次数: 10

摘要

了解负荷的组成和特性,如相应的PV曲线,是进行电压稳定性分析的必要工具。本文研究了在不同机械负载条件下运行的小型工业感应电动机。实验测试确定了系统的PV特性,并评估了不同负载组成下的电压稳定性。实验研究了直接与电网连接的异步电动机,以及变频驱动(VFD)在开环和闭环速度控制配置下的负载特性。确定了每种配置的等效指数负荷模型。通过对恒功率负载和感应电机负载的比较,表明变频器对负载特性有明显的影响,进而影响电压的稳定性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Induction motor loads and voltage stability assessment using PV curves
Knowledge of the load composition and characteristics, such as corresponding PV curves, are necessary tools for the voltage stability analysis. This paper investigates small industrial induction motors that are operated under different mechanical load conditions. Experimental tests were performed to determine the system's PV characteristics and assess the voltage stability under different loading composition. The load characteristics of induction motor directly connected to the grid, as well as operated with a variable frequency drive (VFD) in open and closed loop speed control configurations were investigated experimentally. An equivalent exponential load model was identified for each configuration. The paper compares the constant power loads with the induction motor loads and shows that the VFD will have a pronounced effect on the load characteristic, which in turns affects the voltage stability.
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