基于幅相运动方程的风机机电暂态特性的建模与优化

发布时间：2018-04-05 18:58

本文选题：电力电子化电力系统　切入点：风力发电机　出处：《中国电机工程学报》2017年14期

【摘要】：随着风电在电力系统中的渗透率不断提高,风机的暂态特性对系统(同步发电机)暂态功角稳定的影响显著加深。因此,认识、优化风机的暂态特性具有重要意义。目前对风机暂态特性的认识优化大多是基于详细时域模型的数值仿真研究,缺乏基于物理化模型的机理研究。该文应用幅相运动方程建模方法,建立风机机电暂态幅相运动方程模型,并基于此物理化模型分析以GE风机为代表的现有风机机电暂态特性的物理特征,指出存在的不足并予以优化。该文的研究表明,以GE风机为代表的现有风机在机电尺度上只响应系统电压幅值动态,不响应系统电压相位动态。而只响应电压幅值动态限制了风机能够提供给同步发电机的暂态功角稳定支撑。该文通过将系统频率/相位动态引入到风机限流控制中,使风机同时响应系统电压幅值和相位动态,进一步增强了风机对同步发电机的暂态功角稳定支撑,提高了系统的暂态功角稳定性。
[Abstract]:With the increasing permeability of wind power in power system, the transient characteristics of wind turbine have a significant impact on the transient power angle stability of the system (synchronous generator).Therefore, it is of great significance to realize the optimization of the transient characteristics of the fan.At present, most of the cognition and optimization of fan transient characteristics are based on the detailed time domain model of numerical simulation research, lack of physical model based on the mechanism of research.In this paper, the amplitude and phase motion equation modeling method is applied to establish the mechanical and electrical transient amplitude and phase motion equation model of fan. Based on this physical model, the physical characteristics of the existing fan's electromechanical transient characteristics, represented by GE fan, are analyzed.The shortcomings are pointed out and optimized.The research results show that the existing fans represented by GE fans only respond to the system voltage amplitude dynamics at the electromechanical scale, but do not respond to the system voltage phase dynamics.Only responding to the voltage amplitude dynamically limits the transient power angle stability support that the fan can provide to the synchronous generator.In this paper, the frequency / phase dynamic of the system is introduced into the current limiting control of the fan, which makes the fan respond to the voltage amplitude and phase dynamics of the system simultaneously, and further enhances the support of the fan to the transient power angle stability of the synchronous generator.The transient power angle stability of the system is improved.
【作者单位】：强电磁工程与新技术国家重点实验室(华中科技大学);国网青海省电力公司经济技术研究院;
【基金】：国家重点研发计划项目(2016YFB0900104)~~
【分类号】：TM712;TM743

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