| 基于Buck-Boost电路的三电平逆变器中点平衡控制研究 |
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| 引用本文： | 张韬,赵涛,徐友,季宁一. 基于Buck-Boost电路的三电平逆变器中点平衡控制研究[J]. 电测与仪表, 2017, 54(19) |
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| 作者姓名： | 张韬 赵涛 徐友 季宁一 |
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| 作者单位： | 1. 南京工程学院电力工程学院,南京,211167;2. 南京工程学院自动化学院,南京,211167 |
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| 基金项目： | 南京工程学院校级基金项目 |
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| 摘 要： | 针对二极管箝位式三电平逆变器中点电压不平衡问题,通过分析产生中点电压偏移的原因,采用基于Buck-Boost电路的中点电压平衡方法,并对该平衡电路提出一种PI控制策略。分别对常规小矢量调节法和Buck-Boost电路平衡法进行了研究和分析,仿真结果表明Buck-Boost电路平衡方法及控制策略可有效抑制中点电压偏移,并在高调制比和小电容情况下,电压平衡效果优于常规小矢量调节法。
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| 关 键 词： | 三电平逆变器 空间矢量调制 中点电压平衡 控制策略 |
Study on control technology of neutral-point-voltage balance for three-level inverter with Buck-Boost circuit |
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| Zhang Tao,Zhao Tao,Xu You,Ji Ningyi. Study on control technology of neutral-point-voltage balance for three-level inverter with Buck-Boost circuit[J]. Electrical Measurement & Instrumentation, 2017, 54(19) |
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| Authors: | Zhang Tao Zhao Tao Xu You Ji Ningyi |
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| Abstract: | In the study of three-level inverter, due to the unbalance of neutral-point-voltage, resulting in the output waveform distortion, which made the inverter can't meet the operational requirements.For this, the diode clamped three-level inverter causes neutral-point-voltage unbalance is analyzed in this paper , and a control strategy based on the Buck-Boost balance circuit is presented , which is verified by MATLAB/Simulink.Meanwhile, the traditional small vector adjustment method and the Buck-Boost circuit balance method are studied and analyzed respectively .The simulation results show that the control strategy presented in this paper for the Buck -Boost balance circuit can effec-tively suppress the unbalance of neutral-point-voltage, and the effect of conditions in some way better than small vector adjustment by SVPWM . |
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| Keywords: | three-level inverter SVPWM neutral-point-voltage balance control strategy |
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