| NPC三电平变流器中点电位平衡控制研究 |
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| 引用本文： | 吴宁,肖静,冯玉斌,郭小璇,郭珂,吴良材.NPC三电平变流器中点电位平衡控制研究[J].广西电力,2020(1):30-33,61. |
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| 作者姓名： | 吴宁 肖静 冯玉斌 郭小璇 郭珂 吴良材 |
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| 作者单位： | 广西电网有限责任公司电力科学研究院;重庆大学电气工程学院;深圳古瑞瓦特新能源股份有限公司 |
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| 摘 要： | 三电平中点箝位型(NPC)变流器具有输出电压谐波小、器件开关损耗低等优点,作为变流器拓扑被广泛关注和研究。针对NPC三电平变流器中点电压平衡控制问题,本文通过分析NPC三电平变流器的数学模型和中点电位电压波动原理,提出一种零序电压分量注入法,并通过搭建MATLAB/Simulink仿真模型,通过对比试验分析,充分验证了所提方法可以在有功、无功输出工况下,实现中点电压平衡控制,且系统运行情况良好。
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| 关 键 词： | 中点箝位型变流器 中点电压 平衡控制 零序电压 |
Study on the Neutral Point Potential Balance Control of NPC Three-level Converters |
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| WU Ning,XIAO Jing,FENG Yubin,GUO Xiaoxuan,GUO Ke,WU Liangcai.Study on the Neutral Point Potential Balance Control of NPC Three-level Converters[J].Guangxi Electric Power,2020(1):30-33,61. |
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| Authors: | WU Ning XIAO Jing FENG Yubin GUO Xiaoxuan GUO Ke WU Liangcai |
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| Affiliation: | (Electric Power Research Institute of Guangxi Power Grid Co.,Ltd.,Guangxi Nanning 530023,China;School of Electrical Engineering,Chongqing University,Chongqing 400044,China;Shenzhen Growatt New Energy Co.,Ltd.,Shenzhen 518000,China) |
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| Abstract: | The three-level neutral point clamped(NPC)converter which has been widely studied as a converter topology has advantages including small harmonics of output voltages and low switching loss of devices and so on.Aimed at solving the neutral point potential balance control problem of the NPC three-level converter,a zero-sequence voltage component injection method is proposed by the analysis of the mathematical model of NPC converters and the voltage fluctuation principle of the neutral-point potential.By the building of the MATLAB/Simulink simulation model and the comparison test and analysis,it is proved that the method can realize the neutral-point voltage balance control under the active and reactive output conditions and the operation status of the system is stable. |
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| Keywords: | neutral point clamped converter neutral point voltage balance control zero-sequence voltage |
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