Modeling and Control Technology of the Z-Source Inverter PV Grid-Connected System in the New Energy Equipment

Abstract:

Z-source inverter is the key part of the new energy equipment. A model of Z-source inverter has been built by using the State Space Average Overall Modeling method. It can achieve the linkage control of the direct zero vector d and modulation factor m. According to the model, a control system adopted MPPT tracking control and voltage & current double loop grid-connected control is designed to realize the coordinated control. SHEPWM modulation strategy is used to ensure that the grid current waveform quality. Z-source photovoltaic grid-connected experimental system has been designed and carried out, and the experimental results verify the validity and correctness of the control system.

• Periodical: Advanced Materials Research (Volumes 724-725)
• Pages: 110-115
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.724-725.110
• Online since: August 2013
• Authors: Xiao Li Xu, Ling Xia Meng, Qiu Shuang Liu, Xi Bin Wang
• Keywords: Control Strategy, Photovoltaic Grid, Z-Source Inverter

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