基于虚拟同步机的改进双馈风电机组控制策略研究  被引量:11

Research on control of DFIG with virtual synchronous generator

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作  者:孟子立 王灵梅 姜齐荣[3] 司荣国 鲍玉涛 尚立虎 Meng Zili;Wang Lingmei;Jiang Qirong;Si Rongguo;Bao Yutao;Shang Lihu(Department of Automation,Shanxi University,Taiyuan 030013,China;Wind Turbine Monitoring and Diagnosis Engineering Technology Research Center of Shanxi Province,Taiyuan 030013,China;State Key Lab of Control and Simulation of Power Systems and Generation Equipments,Tsinghua University,Beijing 100084,China;Qinghai Green Power Group Co.,Ltd,Xining 810001,China;Shanxi Zhangze Power Co.,Ltd,Taiyuan 030006,China)

机构地区:[1]山西大学自动化系,山西太原030013 [2]山西省风电机组监测与诊断工程技术研究中心,山西太原030013 [3]清华大学电力系统及发电设备控制和仿真国家重点实验室,北京100084 [4]青海省绿色发电集团股份有限公司,青海西宁810001 [5]同煤集团漳泽电力股份有限公司,山西太原030006

出  处:《可再生能源》2020年第4期502-508,共7页Renewable Energy Resources

基  金:青海省重点研发与转化计划项目(2019-GX-C27)。

摘  要:针对双馈风电机组并网导致风机转速与电网频率相解耦,不及时响应电网频率变化的问题,提出一种基于虚拟定子电压定向的新型双馈风机控制策略。通过改进双馈风机变流器的控制,在风力发电机与电网之间建立起一套虚拟功角,增加了原系统所没有的惯性和阻尼。在稳态时可保障风机运行于最大功率点,当系统发生频率扰动时,可动态地调节风力机组的输出,以响应电网频率的变化。最后,在PSCAD/EMTDC平台上搭建了1.5 MW双馈风机的暂态模型,验证了所提控制策略的有效性。The keep increasing proportion of renewable energy generation,makes the grid inertia continue to fall.For the doubly-fed wind turbines connected to the grid via the power electronic converter,the fan speed is decoupled from the grid frequency and does not respond to changes in the grid frequency.The mechanism of the existing virtual synchronous control is analyzed.This paper has proposed a novel doubly-fed fan control strategy based on virtual stator voltage orientation.Through the improvement of the control of the doubly-fed wind turbine converter,a virtual power angle is established between the wind power generator and the power grid,which increases the inertia and damping that the original system does not have.In steady state,the DFIG can be operated at the maximum power point.When the system is disturbed by fre-quency,the output of the wind turbine can be dynamically adjusted to respond to changes in the grid frequency.Finally,a transient model of a 1.5 MW doubly-fed wind turbine was built on the PSCAD/EMTDC platform to verify the effectiveness of the proposed control strategy.

关 键 词:双馈风力发电机 电网频率 虚拟定子电压定向 

分 类 号:TK81[动力工程及工程热物理—流体机械及工程]

 

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