基于风电网侧变流器虚拟阻尼控制策略的研究  

Research of Virtual Damping Control Strategy for Grid Side Converters of Wind Turbines

作　　者：邬冬临 佘岳 李炳璋 戴茜茜 周旺 Wu Donglin;She Yue;Li Bingzhang;Dai Xixi;Zhou Wang(CRRC Zhuzhou Institute Co.,Ltd.,Zhuzhou Hunan 412001)

机构地区：[1]中车株洲电力机车研究所有限公司,湖南株洲412001

出　　处：《中国仪器仪表》2024年第1期54-58,共5页China Instrumentation

摘　　要：由于风电变流器LCL滤波电路存在谐振问题,为提高风电变流器系统稳定性,目前无源阻尼技术和有源阻尼技术是实现滤波器谐振峰值抑制的有效方法,其中有源阻尼方案是近年来研究的热点。本文通过对LCL型风电并网变流器的入网电流闭环特性进行分析,提出一种基于LCL滤波器的电容电压反馈改进有源阻尼控制方法,在控制环节中构建滤波器增加闭环控制系统的阻尼抑制谐振的发生,提高系统稳定性,不增加额外硬件成本和系统损耗。通过搭建基于双馈感应发电机组网侧变流器仿真模型,对文中提出改进的控制策略进行验证,理论分析和仿真结果证明提出的虚拟阻尼控制策略具有有效性和可行性。Due to the resonance problem in the LCLfiltering circuit of wind power converters,in order to improve the stability of wind power converter systems,passive damping technology and active damping technology are currently effective methods to achieve filter resonance peak suppression,among which active damping scheme has been a hot research topic in recent years.By analyzing the closed-loop characteristics of the grid connected current of the LCL wind power converter,a capacitor voltage feedback improved active damping control method based on the LCLfilter is proposed in the article.By constructing afilter in the control link,the damping of the closed-loop control system is increased to suppress resonance,improve system stability,and do not increase additional hardware costs and system losses.By building a simulation model based on the grid side converter of a doubly fed induction generator set,the improved control strategy proposed in the paper was verified.Theoretical analysis and simulation results proved the effectiveness and feasibility of the proposed virtual damping control strategy.

关 键 词：网侧变流器 LCL 谐振抑制 有源阻尼 滤波器 

分 类 号：TM46[电气工程—电器]