TNPC三电平变流器并联控制策略应用研究

微特电机 ›› 2022, Vol. 50 ›› Issue (1): 45-50.

TNPC三电平变流器并联控制策略应用研究

范立荣¹,江跃龙²,张胜宾¹,李怀俊¹

1.广东交通职业技术学院汽车与工程机械学院,广州 510650;
2.广州铁路职业技术学院信息工程学院,广州 510650

出版日期:2022-01-28 发布日期:2022-02-17
作者简介:范立荣(1985—),男,工程师,研究方向为电力电子与电力传动。
基金资助:
广东省普通高校2021年重点领域专项(新一代信息技术)(2021ZDZX1128);2019年广东省普通高校青年创新人才类项目(2019GKQNCX100)

Research on Application of Parallel Control Strategy of TNPC Three-Level Converter

FAN Lirong¹, JIANG Yuelong², ZHANG Shengbin¹, LI Huaijun¹

1.College of Automobile and Engineering Machinery, Guangdong Transportation Vocational and Technical College, Guangzhou 510650, China;
2.College of Information Engineering, Guangzhou Railway Vocational and Technical College, Guangzhou 510650, China

Online:2022-01-28 Published:2022-02-17

摘要/Abstract

摘要： 两台变流器并联会带来环流,TNPC中点电压的偏移也会导致控制系统失效,对三相TNPC三电平智能变流器并联控制技术策略展开研究,并进行实验验证。为实现并网工况下多台三相TNPC智能变流器并联,采用基于下垂控制的“功率-电压-电流”三环控制方法,并分析了下垂控制的工作原理;对系统中点平衡控制、环流抑制等关键技术进行了说明,通过建立多台三相TNPC智能变流器模型对控制策略进行加载及减载实验验证,实验结果表明,该三相TNPC智能变流器并联控制技术策略的有效性与可行性。

关键词: T型中点钳位, 下垂控制, 中点电位平衡, 环流抑制

Abstract: Parallel connection of two converters will bring about circulating current, and the deviation of the midpoint voltage of TNPC will also lead to failure of the control system. The parallel control technology strategy of three-phase TNPC three-level intelligent converters was studied and verified by experiments. In order to realize the parallel connection of multiple three-phase TNPC intelligent converters under grid-connected conditions, the "power-voltage-current" three-loop control method based on droop control was adopted, and the working principle of droop control was analyzed. The system midpoint was balanced. Key technologies such as control and circulation suppression were explained. The control strategy was verified by loading and unloading experiments by establishing multiple three-phase TNPC smart converter models. The experimental results show that the proposed three-phase TNPC smart converter parallel control technology strategy effectiveness and feasibility.

Key words: T-type neutral-point-clamped(TNPC), droop control, midpoint balance, circulation suppression

中图分类号:

TM464

范立荣,江跃龙,张胜宾,李怀俊. TNPC三电平变流器并联控制策略应用研究[J]. 微特电机, 2022, 50(1): 45-50.

FAN Lirong, JIANG Yuelong, ZHANG Shengbin, LI Huaijun. Research on Application of Parallel Control Strategy of TNPC Three-Level Converter[J]. Small & Special Electrical Machines, 2022, 50(1): 45-50.

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