| 引用本文: | 陈怡薇,徐永海,袁 敞,等.基于切换调制策略的ANPC三电平逆变器开路故障诊断方法研究[J].电力系统保护与控制,2025,53(02):27-37.[点击复制] |
| CHEN Yiwei,XU Yonghai,YUAN Chang,et al.Research on open-circuit fault diagnosis method of ANPC three-level inverter based on switching modulation strategy[J].Power System Protection and Control,2025,53(02):27-37[点击复制] |
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| 摘要: |
| 由于开关器件故障是有源中性点箝位(active neutral point clamped, ANPC)三电平逆变器故障的主要类型，快速定位故障器件对提升ANPC三电平逆变器的可靠性具有重要意义。针对ANPC三电平逆变器开关器件开路故障，从传播路径的角度分析了不同调制算法下开关器件故障对输出电流的影响以及输出电流与负载侧电压的相位差对故障电流波形的影响。以三相输出电流作为故障特征量，提出一种基于切换调制策略的ANPC三电平逆变器开路故障诊断方法。首先采用电流平均值法先对故障开关器件的大致范围进行判定，然后切换调制策略以实现故障器件的精确定位。最后，通过仿真与实验验证了该方法可以在1个基波周期内实现故障定位，具有检测速度快、抗干扰能力强的优点，且无需额外增加用于故障检测的传感器。 |
| 关键词: ANPC三电平逆变器 切换调制策略 开路故障 故障诊断 |
| DOI：10.19783/j.cnki.pspc.240635 |
| 投稿时间：2024-05-23修订日期：2024-08-28 |
| 基金项目:国家重点研发计划项目资助(2021YFB2601403) |
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| Research on open-circuit fault diagnosis method of ANPC three-level inverter based on switching modulation strategy |
| 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: |
| Since switching device faults are the main type of faults in active neutral point clamped (ANPC) three-level inverters, quickly locating the faulty devices is of great significance to improve the reliability of ANPC three-level inverters. For open-circuit faults of switching devices in ANPC three-level inverters, the impact of switching device faults on output current under different modulation algorithms and the influence of the phase difference between output current and load-side voltage on fault current waveform are analyzed from the perspective of propagation paths. Using the three-phase output current as the fault characteristic quantity, an open-circuit fault diagnosis method for ANPC three-level inverters based on switching modulation strategy is proposed. The current averaging method is used to initially determine the approximate range of the faulty switching device, and then the switching modulation strategy is used to precisely locate the faulty device. Finally, simulations and experiments verify that the method can locate faults within one fundamental waveform cycle, with advantages of fast detection speed, strong anti-interference ability, and no need for additional sensors for fault detection. |
| Key words: ANPC three-level inverter switching modulation strategy open-circuit fault fault diagnosis |
