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一种适用于飞跨电容型多电平逆变器的新型载波同相层叠PWM方法 被引量:24
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作者 王琨 冯琳 李国杰 《电力系统保护与控制》 EI CSCD 北大核心 2014年第14期8-13,共6页
传统载波层叠PWM方法不能平衡飞跨电容电压,因此不能直接应用于飞跨电容型多电平逆变器。对传统载波同相层叠PWM方法进行改进,增加了零电平选择环节,根据设定值,合理分配零电平向量,从而在设定周期内,平衡飞跨电容电压。该方法随着调制... 传统载波层叠PWM方法不能平衡飞跨电容电压,因此不能直接应用于飞跨电容型多电平逆变器。对传统载波同相层叠PWM方法进行改进,增加了零电平选择环节,根据设定值,合理分配零电平向量,从而在设定周期内,平衡飞跨电容电压。该方法随着调制度的不同,载波波形会发生变化,和传统载波移相PWM方法相比,线电压谐波性能也得到了很大提高,尤其是在中等调制度下,效果显著。采用该方法对飞跨电容型三电平逆变器进行了仿真验证,结果证明了该方法的正确性与可行性。 展开更多
关键词 飞跨电容型多电平逆变器 载波移相PWM 载波同相层叠PWM 零电平选择环节 电压平衡
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Efficient Choice of a Multilevel Inverter for Integration on a Hybrid Wind-Solar Power Station
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作者 Tajeddine Khalili Abdelhadi Raihani +2 位作者 Hassan Ouajji Omar Bouattane Fouad Amri 《Journal of Power and Energy Engineering》 2015年第9期44-58,共15页
DC/AC converters are very important components that have to be chosen efficiently for each type of power station. In this article, we present in details, a comparison between three different architectures of multileve... DC/AC converters are very important components that have to be chosen efficiently for each type of power station. In this article, we present in details, a comparison between three different architectures of multilevel inverters, the flying capacitor multilevel inverter (FCMLI), the diode clamped multilevel inverter (DCMLI), and the cascaded H-bridge multilevel inverter (CHMLI). Thus the comparison is focused on the output voltage quality, the complexity of the power circuits, the cost of implementation, and the influence on a power bank inside the renewable power station. We also investigate trough simulation the efficient number of levels and suitable characteristics for the CHMLI that showed the most promising performance. The study uses Matlab Simulink platform as a tool of simulation, and aim to choose the most qualified inverter, for a potential insertion on a hybrid renewable energy platform (wind-solar). In all the simulations we use the same PWM control type (SPWM). 展开更多
关键词 MULTILEVEL INVERTERS fcmli DCMLI CHMLI HYBRID POWER Station SPWM POWER BANK
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