Performance Analysis of Trapezoidal Triangular Carrier Based Modulation Techniques in Multilevel Inverter for Grid Integrated Solar Photovoltaic System

Md. Harun-Ur-Roshid, M. Rahman, Md. Tariqul Islam, M. H. Maruf, Sourav Barua, H. H. Fayek
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Abstract

Multilevel Inverter has become trending topology due to the involvement of renewable sources in the grid operation. Therefore, researchers have worked on the controlling methodology so that its efficiency will be almost 100%. In this regard, several multicarrier arrangements have been proposed for the reduction of THDs and switching losses, where the triangular wave is used as a carrier signal. In this paper, for increasing the performance of grid-connected eleven-level inverter, trapezoidal triangular carrier-based several multicarrier arrangements like phase disposition (PD), phase opposition disposition (POD), alternate phase opposition disposition (APOD) have been introduced and the performances of these arrangements were evaluated in MATLAB Simulink environment. From the simulation results, it is seen that the PD arrangement curtails 18.05% and 12.19 % of total harmonic distortions than POD and APOD arrangements gradually. Besides that, the lower order harmonic of the multilevel inverter is significantly lower in PD arrangement than other topologies and these characteristics will make the PD topology an optimal multicarrier arrangement in the future.
并网太阳能光伏系统多电平逆变器梯形三角载波调制技术性能分析
由于可再生能源在电网运行中的参与,多电平逆变器已成为趋势拓扑。因此,研究人员致力于控制方法,使其效率几乎达到100%。在这方面,已经提出了几种多载波安排,以减少THDs和开关损耗,其中三角波被用作载波信号。为了提高并网十一电平逆变器的性能,介绍了基于梯形三角形载波的几种多载波配置方式,如相位配置(PD)、相位对抗配置(POD)、交替相位对抗配置(APOD),并在MATLAB Simulink环境下对这些配置方式的性能进行了评价。仿真结果表明,与POD和APOD布置相比,PD布置可逐渐减少总谐波畸变18.05%和12.19%。此外,PD布局的低次谐波明显低于其他拓扑结构,这些特性将使PD拓扑成为未来最优的多载波布局。
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