中点活箝位三相三级逆变器  

ANPC Three-phase Three-level Inverter

作　　者：陈贤明[1] 

机构地区：[1]国网电力科学研究院,江苏南京210003

出　　处：《大功率变流技术》2012年第5期10-16,共7页HIGH POWER CONVERTER TECHNOLOGY

摘　　要：适用于中、大功率电气装置的多级逆变器,常用的有二极管中点箝位(NPC)、飞跨电容(FC)和串级H桥(C H B)三种,其中中点箝位多级逆变器用得较多。为了得到输出正弦波电压和电流,常要用脉宽调制(PWM)。实践证明,这种中点箝位多级逆变器中开关元件损耗不均匀,如三相三级NPC逆变器中只有外围的6只电力电子开关元件可作PWM控制,导致其开关的损耗和发热远大于内圈6只元件的。为解决上述问题,充分发挥多级逆变器潜力,中点活箝位(Active neutral point clamped,ANPC)多级逆变器被提出。文章分析了ANPC三相三级逆变器的原理,并提出了其PWM控制原理。仿真结果表明达到了预期效果,为进一步开发实际装置奠定了基础。There are three kinds of multi-level inverters （MLI） suitable for medium and large power application, such as neutral point clamped/NPC） with diodes, flying capacitor （FC） and cascade H bridge （CHB）. Among them NPC MLI is used popular nowadays. In order to obtain sinusoidal voltage and current from the inverter, PWM control is needed. However, practice shows that power loss of power electronic switch devices for NPC MLI is different. For instance, only six external switch devices inside NPC three-phase three-level inverter are able to realize control with PWM, which causes them more loss and higher heating than that of other six internal switch devices. In order to solve above problem and fully develop the potential of multi-level inverter, active neutral point clamped （ANPC） MLI is suggested. The operation principle and PMW control principle of ANPC three-phase three-level inverter are analyzed in the paper. Simulation results show that expected aim is attained, and it has laid a foundation for developing a practical device.

关 键 词：中点活箝位(ANPC) 三相三级逆变器 脉宽调制(PWM) 单周控制(OCC) MATLAB/SIMULINK仿真 

分 类 号：TM464[电气工程—电器]