电压跌落故障下的双馈型风力发电机动态响应特性分析  

Study on Dynamic Response Characteristics of DFIG-Based Wind Turbines Under Grid Voltage Drop

作　　者：王皓怀 陈懿[2] 王坚 王静[2] 汪勋婷 

机构地区：[1]南方电网调度中心,广东广州510000 [2]武汉大学电气工程学院,湖北武汉430072

出　　处：《智慧电力》2017年第9期14-19,25,共7页Smart Power

基　　金：国家自然科学基金项目(51077103)~~

摘　　要：双馈型风力发电机(DFIG)对机端电压跌落比较敏感,导致了随着其渗透率的提高,对电网的安全稳定性及自身的安全运行产生了威胁。因此,研究在电压跌落故障下DFIG的动态响应过程对双馈型风力发电机并网稳定性有重要意义。从电气响应特性和机械响应特性2大部分出发,建立了这2大部分各元件的数学模型,研究并提出了相关控制策略;然后进行动态响应过程分析,得出了动态响应特性与电网电压跌落水平、短路前DFIG运行状态、转子侧所采用的控制策略有关。在DlgSILENT/PowerFactory平台上仿真了不同电压跌落水平场景下风机不同出力水平时风机的机械和电气动态响应过程,验证了理论分析的正确性。Double-fed induction generator （DFIG） is sensitive to voltage drop, so the security and stability of the grid and the DFIG itself are under the threat with rapid increase of DFIG. Therefore, it is important to study dynamic response of DFIG when voltage drop failure happened in power system. Firstly, mechanical and electrical models and the control strategy are respectively introduced. Then through the analysis of response process, it is concluded that the dynamic response characteristics are related to voltage drop level, operating status of DFIG and control strategy adopted to rotor side. Last, the correctness of conclusion is validated by the simulation of mechanical and electrical response processes in different voltage levels drop and different DFIG output levels on DIgSILENT/ PowerFactory software platform.

关 键 词：双馈风力发电机 机械响应过程 电气响应过程 电压跌落 运行状态 控制策略 

分 类 号：TM614[电气工程—电力系统及自动化]