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ISSN 0254-0096 CN 11-2082/K

太阳能学报 ›› 2022, Vol. 43 ›› Issue (11): 277-284.DOI: 10.19912/j.0254-0096.tynxb.2021-0459

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基于DSVPWM的PMSG并联型GS-NSC研究

王梦涛1, 任永峰1, 乌森高乐2, 钱智涌1   

  1. 1.内蒙古工业大学电力学院,呼和浩特 010080;
    2.格拉斯哥大学电子电气工程系,格拉斯哥 G128QQ
  • 收稿日期:2021-04-27 出版日期:2022-11-28 发布日期:2023-05-28
  • 通讯作者: 任永峰(1971—),男,博士、教授,主要从事新能源发电运行与控制、储能技术、智能电网技术方面的研究。renyongfeng@vip.sina.com
  • 基金资助:
    国家自然科学基金(51967016; 51567020); 内蒙古自治区科技重大专项(2019ZD027); 内蒙古自治区科技计划(201802035)

PARALLEL GS-NSC BASED ON DSVPWM FOR PMSG WIND POWER SYSTEM

Wang Mengtao1, Ren Yongfeng1, Wu Sengaole2, Qian Zhiyong1   

  1. 1. College of Electric Power, Inner Mongolia University of Technology, Hohhot 010080, China;
    2. College of Electronic and Electrical Engineering, University of Glasgow, Glasgow G128QQ, England
  • Received:2021-04-27 Online:2022-11-28 Published:2023-05-28

摘要: 为提高九开关变换器直流侧电压利用率,减少开关损耗,采用一种不连续空间矢量脉宽调制(DSVPWM),同时将九开关变换器用于直驱式永磁同步风力发电机(PMSG)网侧构成并联型网侧九开关变换器(GS-NSC)。在对并联型GS-NSC控制策略、故障穿越方案进行理论分析的基础上,建立PMSG并联型GS-NSC仿真模型,设计多种电网电压故障工况对其进行仿真研究。结果表明,在电网电压正常工况下,并联型GS-NSC可维持电网电流的正弦波特性。在电网电压跌落工况下,并联型GS-NSC可向电网注入无功电流辅助电网电压的恢复,并通过提升并网电流幅值减少卸荷电路的功率损耗,降低PMSG散热负担。在电网电压骤升工况下,并联型GS-NSC可动态分配直流母线电压,避免因直流侧过压而导致PMSG退出运行。

关键词: 风力涡轮机, 电力变流器, 电能质量, 不连续空间矢量脉宽调制, 故障穿越

Abstract: In order to improve the utilization of the DC side voltage of the nine-switch converter and reduce the switching loss, a discontinuous space vector pulse width modulation(DSVPWM) is proposed. At the same time, the nine-switch converter is used in the direct-driven wind turbine with permanent-magnet synchronous generator(PMSG) on the grid side to form a parallel grid-side nine-switch converter(GS-NSC). Based on the theoretical analysis of the parallel GS-NSC control strategy and fault ride-through scheme, a PMSG parallel GS-NSC simulation model is established, and a variety of power grid voltage fault conditions are designed for simulation research. The results show that the parallel GS-NSC can maintain the sine wave characteristics of the grid current under normal working conditions of the grid voltage. Under the condition of power network voltage plummeting, the parallel GS-NSC can inject reactive current into the grid to assist the recovery of the grid voltage, and reduce the power loss of the unloading circuit by increasing the grid-connected current amplitude and reduce the PMSG's heat dissipation burden. Under the condition of voltage surge, the parallel GS-NSC can dynamically distribute the DC bus voltage to avoid the PMSG from exiting operation due to overvoltage on the DC side.

Key words: wind turbines, electric converters, power quality, discontinuous space vector pulse width modulation, fault ride through

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