基于磁链作为状态变量的饱和异步电机模型

Induction machine model using flux linkage as state variables including saturation

随着风力发电的快速发展,风力发电场的短路故障分析研究引起了越来越多的关注。其中,风力发电机的短路电流计算对于风电场的保护和电力系统的稳定有着十分重要的意义。因此,风力发电场的故障分析和继电保护整合对风力发电机模型提出了更高的要求。本文研究了第一类风力发电机——异步电机,建立了以磁链作为状态变量的异步电机模型,并着重分析了磁路饱和下的异步电机模型。通过与传统异步电机dq模型的比较,该模型有效地提高了模型的运算精度和仿真效率。

With increased penetration of wind energy in power generation, the fault analysis of wind farm is drawing more and more attention. The calculation of short circuit current contributed from wind farms has significant impact for wind farm protection and power system stability, and advanced wind generator models are demanded for the fault analysis and relay setting of wind farm. This paper investigates Type I wind turbine-generator, and a novel model of induction machine using flux linkages as the state variable including saturation is proposed. The improvement of calculation accuracy and efficiency is validated by comparing simulations of short circuits in various commercially available simulation packages.