基于永磁直驱同步风电机组的分频海上风电系统控制策略

发布时间：2018-03-02 07:10

本文关键词： 风力发电分频输电系统永磁直驱发电机矢量控制　出处：《电力系统自动化》2014年11期 　论文类型：期刊论文

【摘要】：海上风电经分频输电线路传输的研究近年来引起国内外的关注。由去除机端换流器的多台基于永磁直驱同步发电机(PMSG)的风电机组、海底电缆和交交变频器组成的分频海上风电系统,可通过线路末端的交交变频器控制PMSG的转速捕获风能,可节省初始投资和运行维护费用。考虑变压器和输电线路的影响后,推导出分频海上风电系统的准稳态模型,基于转子平均磁链定向给出多机矢量控制器的设计原理;从曲线拟合的角度,给出多机组运行频率的求解方法;以4台PMSG为例,搭建了分频海上风电系统仿真模型。结果表明采用多机矢量控制方法,在不同风速条件下,风电机组的转速均能够跟随指令值,并实现风能的最优捕获。
[Abstract]:In recent years, the research on transmission of offshore wind power through frequency-divided transmission lines has attracted much attention both at home and abroad. From the wind turbine units based on PMSG (permanent Magnet Direct Drive synchronous Generator) which remove the converter at the end of the machine, The sub-frequency offshore wind power system composed of submarine cable and AC / AC converter can capture wind energy by controlling the speed of PMSG through the AC-AC converter at the end of the line, which can save the initial investment and operation and maintenance cost. Considering the influence of transformer and transmission line, The quasi steady state model of frequency division offshore wind power system is derived, the design principle of multi machine vector controller based on rotor mean flux orientation is given, the method of solving the operating frequency of multi unit is given from the angle of curve fitting, and the four PMSG as an example, The simulation model of frequency division offshore wind power system is built. The results show that the speed of wind turbine unit can follow the instruction value under different wind speed conditions by using multi-machine vector control method and realize the optimal capture of wind energy.
【作者单位】：西安交通大学电气工程学院;
【基金】：国家自然科学基金青年基金资助项目(51307136)~~
【分类号】：TM614

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