摘要
提出了一种新型的三相单边三电平逆变器,其前级通过Boost变换器实现三电平供电,逆变部分采用一侧三电平一侧两电平的形式来简化电路结构;分析了该电路的工作原理,并设计了适用于该电路结构的五段工作模式空间矢量脉冲宽度调制策略,实现了三电平侧的正常调制及两电平侧的低损耗调制。在该调制策略下,电路具有相对简单的控制算法,而且在简化逆变电路体积的同时仍能实现较低的开关损耗及输出电压电流较少的谐波含量。在MATLAB/SIMULINK环境下建模仿真,仿真结果验证了该新型电路的有效性和优越性及其调制策略的可行性。
This paper proposes a novel three-phase unilateral three-level inverter which uses pre-boost converter to im- plement three-level power supply and adopts three-level on one side and two-level on another side in the inverter part to simplify the circuit structure. The working principle is analyzed and a five segment work mode space vector pulse width modulation （SVPWM） strategy is proposed which can implement normal modulation on the three-level side and low loss modulation on the two-level side. Under this strategy, the circuit has a relatively simple control algorithm, and can still achieve lower switching loss and less harmonic content of output voltage and current while reduce the volume of the inverter. Modeling in MATLAB/SIMULINK, the simulation results verify the effectiveness and superiority of the new type circuit and the feasibility of its modulation strategy.
出处
《电测与仪表》
北大核心
2015年第21期34-39,共6页
Electrical Measurement & Instrumentation
关键词
单边三电平
逆变器
空间矢量脉冲宽度调制
仿真
unilateral three-level, inverter, space vector pulse width modulation （SVPWM）, simulation
