Small signal stability analysis of fixed speed wind generator including SDBR

2012 XXth International Conference on Electrical Machines Pub Date : 2012-11-12 DOI:10.1109/ICELMACH.2012.6350182

M. H. Shawon, Ahmed Al Durra, S. Muyeen

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引用次数: 8

Abstract

This paper discusses small signal stability analysis of a grid connected fixed speed wind turbine driven induction generator (IG) including series dynamic braking resistor (SDBR). The stator windings of IG are directly connected to a power grid thorough a step-up transformer and transmission line, where SDBR is dynamically inserted in the generation circuit for short time during network disturbance. A detailed mathematical model of IG, transmission line, SDBR and grid is employed to derive the complete dynamic equation of the studied system. The purpose of SDBR is to mitigate the destabilizing depression of electrical torque and power during disturbance period. The power system small signal stability analysis is carried out by eigen value analysis. Modal and sensitivity analyses, participation factors are carried out to discover the relations between the modes and state variables. Finally, this paper presents an analysis of the dynamic behavior of fixed speed wind generator under voltage dip conditions with and without considering SDBR. The results of these studies are verified by a time domain simulation model developed in MATLAB/SIMULINK.

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含SDBR的定速风力发电机小信号稳定性分析

本文讨论了含串联动态制动电阻(SDBR)的并网定速风力发电机(IG)的小信号稳定性分析。IG的定子绕组通过升压变压器和传输线直接与电网相连，在电网扰动时，SDBR在发电电路中动态插入短时间。利用IG、输电线路、SDBR和电网的详细数学模型，推导出研究系统的完整动力学方程。SDBR的目的是减轻扰动期间电转矩和功率的不稳定下降。利用特征值分析法对电力系统进行小信号稳定性分析。通过模态分析、灵敏度分析、参与因子分析来发现模态与状态变量之间的关系。最后，分析了考虑SDBR和不考虑SDBR的电压降工况下固定转速风力发电机的动态特性。通过MATLAB/SIMULINK开发的时域仿真模型验证了研究结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2012 XXth International Conference on Electrical Machines

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