摘要
多电平技术在电力系统无功补偿中应用广泛,对于高压大功率领域要兼顾使用的主开关器件尽量少而产生电平数尽量多这两方面的要求,提出了一种新型级联不对称拓扑,使用9只开关管即可实现九电平的电压输出。文章对这种新型拓扑结构的原理和其PWM控制方法进行了分析,最后选用了分段层叠式PWM控制方法。在此理论基础上,利用Matlab仿真软件进行无功补偿仿真研究,仿真结果表明,级联不对称拓扑结构具有输出波形质量好、无功补偿效果理想等优点。
As a broad application of multilevel inverters in STACOM, a new cascade asymmetric topology is proposed in the paper. In order to meet the requirements of using fewer switching devices but producing more levels, the topolo- gy uses only nine switches but can produce nine - level voltage output. Segmented and stacked PWM control method is picked up after analyzing both the principle of the topology and the PWM control methods. The simulation software Matlab is used to prove the validity of this system. Simulation results show that both the quality of the output wave- forms and the results of reactive power compensation are satisfactory.
出处
《电测与仪表》
北大核心
2013年第1期62-65,共4页
Electrical Measurement & Instrumentation
