Abstract
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).
Highlights
Multilevel inverters have emerged, as a new option for DC/AC conversion [1] for high power and renewable energy applications [2] [3]
There are many topologies of multilevel inverters, some are basic, others are a combination of different types, and they can be classified into three basic structures: the flying capacitor multilevel inverter (FCMLI), the diode clamped multilevel inverter (DCMLI), and the
In this paper we decided to focus our study on the three 5 level basic multilevel inverters, as they are the most widespread [9], and investigate the most efficient parameters for the cascaded H-bridge multilevel inverter (CHMLI), as it was the best candidate in our comparative study
Summary
Multilevel inverters have emerged, as a new option for DC/AC conversion [1] for high power and renewable energy applications [2] [3]. In this paper we decided to focus our study on the three 5 level basic multilevel inverters, as they are the most widespread [9], and investigate the most efficient parameters for the CHMLI, as it was the best candidate in our comparative study. An analysis using Matlab Simulink tool was made, to compare between the performances of the different 5 levels architectures (voltage quality, the complexity of the power circuits, the cost of implementation [10], and the impact on a power bank inside the renewable power station) using the same PWM techniques [11] in order to choose the best inverter suited for a hybrid wind-solar renewable power station. A simulative testing of the CHMLI inverter was made from level 5 to 15
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