基于非连续脉宽调制的T型三电平容错控制*

doi:10.16628/j.cnki.2095-8188.2020.03.011

电器与能效管理技术 ›› 2020, Vol. 588 ›› Issue (3): 63-69.doi: 10.16628/j.cnki.2095-8188.2020.03.011

• 分布式电源及并网技术 • 上一篇下一篇

基于非连续脉宽调制的T型三电平容错控制^*

侯蕊欣, 朱学洲, 胡道玖

合肥工业大学电气工程和自动化学院,安徽合肥 230009

收稿日期:2019-12-28 出版日期:2020-03-30 发布日期:2020-04-21
作者简介:侯蕊欣(1994—),女,硕士研究生,研究方向为电网安全分析、智能电网运维和配电物联网技术。朱学洲(1986—),男,硕士研究生,研究方向为智能电网运维和配电物联网技术。胡道玖(1973—),男,副教授,研究方向为分布式并网技术等。
基金资助:
*国网山东省电力公司科技项目资助(5206141600V)

T-type Three-Level Fault Tolerant Control Based on Discontinuous Pulse Width Modulation

HOU Ruixin, ZHU Xuezhou, HU Daojiu

School of Electrical Engineering and Automation,Hefei University of Technology, Hefei 230009, China

Received:2019-12-28 Online:2020-03-30 Published:2020-04-21

摘要/Abstract

摘要： 针对T型三电平逆变器内管故障问题,提出了一种基于非连续脉宽调制(DPWM)的故障容错控制策略,策略既可以在单相、两相和三相内管故障后安全可靠运行,又可以实现中点电压波动最小。分析了中点电压的控制方法,根据故障对电流方向的影响提出了两种调制方法;探究了系统在基波周期内平衡的必要条件,并找到了非故障状态下的最优钳位方法;依据故障类型及其调制方法,详细分析了各种故障状态下钳位方法的选择,实现了中点电压波动最小的DPWM容错控制;最后,通过实验验证了DPWM容错控制的可行性和优越性。

关键词: T型三电平逆变器, 非连续脉宽调制, 故障容错控制, 三电平变流

Abstract: Aiming at the internal tube fault of T-type three-level inverters,this paper presented a fault-tolerant control strategy based on discontinuous pulse width modulation (DPWM).This strategy can not only operate safely and reliably after single-phase,two-phase and three-phase internal tube faults,but also minimize the fluctuation of neutral point voltage.Firstly,the control method of neutral point voltage is analyzed,and two modulation methods are put forward according to the influence of fault on current direction.Secondly,the necessary condition of system balance in fundamental wave period is explored,and the optimal clamping method in non-fault state is found.Thirdly,according to fault type and modulation method,the selection of clamping methods under various fault states is detailed analyzed,and the DPWM fault-tolerant control with minimum neutral point voltage fluctuation is realized.Finally,the feasibility and superiority of DPWM fault-tolerant control are verified by experiments.

Key words: T-type three-level inverter, discontinuous pulse width modulation (DPWM), fault-tolerant control, three level converter

中图分类号:

TM464

侯蕊欣, 朱学洲, 胡道玖. 基于非连续脉宽调制的T型三电平容错控制^*[J]. 电器与能效管理技术, 2020, 588(3): 63-69.

HOU Ruixin, ZHU Xuezhou, HU Daojiu. T-type Three-Level Fault Tolerant Control Based on Discontinuous Pulse Width Modulation[J]. DIANQI YU NENGXIAO GUANLI JISHU, 2020, 588(3): 63-69.

基于非连续脉宽调制的T型三电平容错控制^*

T-type Three-Level Fault Tolerant Control Based on Discontinuous Pulse Width Modulation

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