基于无功电流补偿的Vienna整流器双极性直流母线电压平衡策略  

Bipolar DC⁃link Voltage Balancing Strategy Based on Reactive Current Compensation for Vienna Rectifier

作　　者：黄招彬 张志坚 龙潭 胡斌 刘文龙 王高林[2] HUANG Zhaobin;ZHANG Zhijian;LONG Tan;HU Bin;LIU Wenlong;WANG Gaolin(GD Midea Air Conditioning Equipment Co.,Ltd.,Foshan 528311,Guangdong,China;School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China)

机构地区：[1]广东美的制冷设备有限公司,广东佛山528311 [2]哈尔滨工业大学电气工程及自动化学院,黑龙江哈尔滨150001

出　　处：《电气传动》2024年第12期33-39,46,共8页Electric Drive

基　　金：广东美的制冷设备有限公司与哈尔滨工业大学战略合作框架协议(MH20210648)。

摘　　要：当Vienna整流器连接不平衡负载运行在轻载条件时,较小的负载功率差异会导致双极性直流母线电压存在不平衡问题,增加了开关器件和直流电容的电压应力。为解决上述问题,提出一种基于无功电流补偿的双极性直流母线电压平衡策略。结合三相参考电压可叠加零序分量幅值的大小分析不同功率可输出的中点电流。以相电压占空比为依据揭示了参考电压和输入电流的相角差对中点电流的影响,并由Vienna整流器的可运行区域得到奇、偶扇区的最大补偿无功电流。为增大轻载条件下的中点电流,以中点电流等高线为依据,在奇、偶扇区分别注入不同形式的无功电流补偿相角差,从而实现轻载条件下的双极性直流母线电压平衡。最后,所提出策略在Vienna整流器实验平台上进行了验证。When the Vienna rectifier is connected to unbalanced loads operating under light load conditions,the slight power difference causes unbalanced voltage of bipolar DC bus,which increases the voltage stress on the switching device and DC-link capacitance.To solve the above problems,a DC offset reduction of neutral point voltage strategy based on reactive current compensation for Vienna rectifier with bipolar DC-link was proposed.By combining the amplitude of zero-sequence component,which is superimposed onto the three-phase reference voltage,the neutral point current for various power conditions can be obtained.The effect of the phase angle difference between the reference voltage and the input current on the neutral point current was analyzed,and the maximum reactive currents of the odd and even sectors was obtained according to the operating region of the Vienna rectifier.In order to increase the neutral point current under light load condition,the reactive current was injected to change the phase angle difference according to the contour of neutral point current,thereby achieving the balance of bipolar DC bus under light load conditions.Finally,the effectiveness of the proposed strategy was verified on the Vienna rectifier experimental platform.

关 键 词：VIENNA整流器 母线电压平衡 轻载运行 双极性直流母线电压 无功电流补偿 

分 类 号：TM28[一般工业技术—材料科学与工程]