A Study of Over-modulation Impact on the MSI Series Micro-Grid Output Voltage

2019 4th Asia Conference on Power and Electrical Engineering

能源学;电工学

Ding, Yingjie^1 ; Wang, Xinggui^1 ; Yang, Weiman^1

College of Electrical Engineering and Information Engineering, Lanzhou University of Technology, China^1

关键词: Fundamental wave;    Harmonic wave;    Micro sources;    Over modulation;    Series connections;    Voltage characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/486/1/012133/pdf
DOI  :  10.1088/1757-899X/486/1/012133

来源: IOP

【 摘 要 】

In order to analyse the over-modulation technique impact on the micro-source inverter (MSI) series micro grids (SMGs) output voltage, firstly Double Fourier method applied to derive the single inverter output voltage characteristics under over-modulation condition; Secondly, based on the characteristics of the MSI series micro-grids, a new formula of the system output voltage is derived. Thirdly, the impact on the system output voltage fundamental component and harmonic component is analysed in detail, the results show that the output voltage fundamental component increases with the increasing modulation while keeps constant after a certain over-modulation depth. Finally, a simulation was carried out and the simulation verified the theoretical analysis.