电器与能效管理技术 ›› 2023, Vol. 0 ›› Issue (9): 43-49.doi: 10.16628/j.cnki.2095-8188.2023.09.007

• 电器设计与探讨 • 上一篇    下一篇

基于碳化硅的双向PCS设计

陈奇, 张彬意, 毛行奎   

  1. 福州大学 电气工程与自动化学院, 福建 福州 350108
  • 收稿日期:2023-05-27 出版日期:2023-09-30 发布日期:2023-11-23
  • 作者简介:陈 奇(1996—),男,硕士研究生,研究方向为电力电子变流技术。|张彬意(1998—),男,硕士研究生,研究方向为电力电子变流技术。|毛行奎(1978—),男,教授,博士,研究方向为电力电子高频磁技术、新能源发电与储能技术和无线电能传输技术。
  • 基金资助:
    国家自然科学基金项目(51207025);国家自然科学基金项目(52107183)

Bidirectional PCS Design Based on Silicon Carbide

CHEN Qi, ZHANG Binyi, MAO Xingkui   

  1. College of Electrical Engineering and Automation,Fuzhou University, Fuzhou 350108, China
  • Received:2023-05-27 Online:2023-09-30 Published:2023-11-23

摘要:

随着双向储能变流器(PCS)朝着高电压、高效率的趋势发展,SiC器件在双向PCS中开始应用。SiC的PCS主电路拓扑采用可以有效降低并网电流谐波的T型三电平逆变电路。针对SiC器件开关频率高,基于相电压采样的锁相控制比较容易受干扰,以及电网不平衡时容易影响系统稳定性,提出基于线电压采样的锁相环以及相应的并网电流正负序分离控制策略。最后,搭建了1台基于SiC的10 kW双向PCS实验样机,样机性能良好,运行稳定可靠,实验验证所设计方案和控制策略正确有效。

关键词: 双向储能变流器, T型三电平逆变电路, 碳化硅, 控制策略

Abstract:

With the development of bidirectional power conversion system (PCS) towards high voltage and high efficiency,SiC devices are gradually being applied in bidirectional PCS.The PCS main circuit topology of SiC adopts a T-type three-level inverter circuit that can effectively reduce grid connected current harmonics.Aiming at the high switching frequency of SiC devices,the phase-locked control based on phase voltage sampling is more susceptible to interference,and the system stability is easily affected when the power grid is unbalanced,a phase-locked loop based on line voltage sampling and the corresponding positive and negative sequence separation control strategy of grid-connected current are proposed.Finally,a 10 kW bidirectional PCS experimental prototype based on SiC is built,which shows good performance and stable and reliable operation.The experimental results verify the correctness and effectiveness of the design scheme and control strategy.

Key words: bidirectional power conversion system, T-type three-level inverter circuit, silicon carbide, control strategy

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