| 引用本文: | 陈怡薇,徐永海,袁 敞,等.线性负载下三电平逆变器的两相箝位断续脉宽调制策略研究[J].电力系统保护与控制,2025,53(8):96-104.[点击复制] |
| CHEN Yiwei,XU Yonghai,YUAN Chang,et al.Research on two-phase clamped discontinuous pulse width modulation strategy for three-level inverters under linear load[J].Power System Protection and Control,2025,53(8):96-104[点击复制] |
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| 摘要: |
| 断续脉冲宽度调制(discontinue pulse width modulation, DPWM)策略可以实现逆变器每一相开关器件在1/3周期内不动作，从而降低开关损耗，但其降低损耗的能力仍有进一步提升的空间。为此，以有源中性点箝位(active neutral point clamped, ANPC)三电平逆变器为研究对象，提出了一种适用于三电平逆变器的两相箝位断续脉宽调制(two-phase clamped DPWM, TPCDPWM)策略。将空间参考矢量近似等效为由两邻近矢量合成的近似矢量，并以合成误差最小为目的划分调制区域。在此基础上对多种调制策略作用下的开关损耗、合成误差、谐波特性及中点平衡能力进行了分析对比。最后将空间矢量脉宽调制(space vector PWM, SVPWM)与TPCDPWM策略进行对比实验研究，验证了所提TPCDPWM策略可以实现ANPC三电平逆变器每一相开关器件在2/3周期内不动作，能显著降低开关损耗。 |
| 关键词: ANPC三电平逆变器 两相箝位断续脉宽调制 开关损耗 空间矢量调制 |
| DOI：10.19783/j.cnki.pspc.240899 |
| 投稿时间：2024-07-11修订日期：2024-11-19 |
| 基金项目:国家重点研发计划项目资助(2021YFB2601403) |
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| Research on two-phase clamped discontinuous pulse width modulation strategy for three-level inverters under linear load |
| CHEN Yiwei,XU Yonghai,YUAN Chang,SONG Xinyi,SUN Shuguang |
| (School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China) |
| Abstract: |
| The discontinue pulse width modulation (DPWM) strategy allows each phase of the inverter switching device to remain inactive for one-third of a cycle, thereby reducing the switching loss. However, there is still room for further improvement in loss reduction. This paper takes the active neutral point clamped (ANPC) three-level inverter as the research object, and proposes a two-phase clamped DPWM (TPCDPWM) strategy suitable for three-level inverter. This method approximates the space reference vector as a composite vector synthesized by two adjacent vectors while minimizing the synthesis error to determine the modulation region. On this basis, the switching loss, synthesis error, harmonic characteristics, and neutral point balancing ability under various modulation strategies are analyzed and compared. Finally, a comparative experimental study of space vector PWM (SVPWM) and TPCDPWM strategies is carried out, and it is verified that the proposed TPCDPWM strategy enables each phase switch of the ANPC three-level inverter to remain inactive for two-third of a cycle, significantly reducing switching loss. |
| Key words: ANPC three-level inverter two-phase clamped discontinue PWM switching loss space vector modulation |
