考虑风轮机动态特性的虚拟同步永磁直驱风机阻尼转矩系数分析  

Damping Torque Coefficient Analysis of Virtual Synchronous Direct-driven Permanent Magnetic Synchronous Generator Considering Wind Turbine Dynamics

作　　者：陆秋瑜 赵仕兴 杨银国 汤莹怡 李力 曲仝 LU Qiuyu;ZHAO Shixing;YANG Yinguo;TANG Yingyi;LI Li;QU Tong(Electric Power Dispatching and Control Center of Guangdong Power Grid Corporation,Guangzhou 510600,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]广东电网有限责任公司电力调度控制中心,广州510600 [2]西安交通大学电气工程学院,西安710049

出　　处：《高电压技术》2022年第10期3838-3847,共10页High Voltage Engineering

基　　金：中国南方电网公司科技项目(036000KK52210042,GDKJXM20212057)。

摘　　要：为了研究风轮机动态特性对于基于虚拟同步发电机控制的风电并网系统稳定性的影响,建立了反映风轮机动态特性的永磁同步风电机组基于VSG控制下的线性化数学模型,推导了系统阻尼转矩系数的表达式。进一步分析了最大功率点跟踪模式下影响风电并网系统稳定性的关键因素,揭示了风轮机动态特性会削弱风电并网系统的阻尼甚至导致系统不稳定的现象。解析得出了考虑稳定性约束的VSG阻尼控制参数的最小值,以确保在低于额定风速的任何负载水平下的系统稳定性。最后,通过MATLAB对风电场并网系统的时域仿真,验证了分析结论的准确性。In order to study the influence of wind turbine dynamics on the stability of wind energy conversion grid-connected system based on virtual synchronous generator(VSG)control,we established a linearized model of the permanent magnet synchronous generator reflecting the wind turbine dynamics connected to the grid via VSG.Based on a mathematical model,the expression of the damping torque coefficient was deduced.The key factors affecting the stability of the wind energy conversion grid-connected system working at the maximum power point track(MPPT)was analytically revealed.As a result,it is revealed that the wind turbine dynamics may impair the damping and even lead to system instability.Moreover,the minimum value of VSG damping control parameter is analytically given to ensure the system stability for any load below the rated wind speed.Finally,the accuracy of the conclusion is verified by the time-domain simulation of the wind farm system in MATLAB.

关 键 词：风轮机动态特性 虚拟同步发电机 永磁同步风力发电机 阻尼转矩系数 最大功率点跟踪 

分 类 号：TM315[电气工程—电机]