Research on the single-phase single-stage photovoltaic grid-connected current source inverter

2016 ◽  
Author(s):  
Wang Jing ◽  
Chang Xiaowei ◽  
Li Jielin
Keyword(s):  
Single Phase ◽  
Current Source ◽  
Single Stage ◽  
Current Source Inverter

scholarly journals High Performance Single-Phase Single-Stage Grid-Tied PV Current Source Inverter Using Cascaded Harmonic Compensators

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 380 ◽  
Author(s):  
Nahla E. Zakzouk ◽  
Ahmed K. Abdelsalam ◽  
Ahmed A. Helal ◽  
Barry W. Williams
Keyword(s):  
High Performance ◽  
Single Phase ◽  
Short Circuit ◽  
Current Source ◽  
Single Stage ◽  
Current Loop ◽  
Current Harmonics ◽  
Grid Current ◽  
Current Source Inverter ◽  
Low Order

In this paper, a single-phase single-stage photovoltaic (PV) grid-tied system is investigated. The conventional pulse width modulated (PWM) voltage source inverter (VSI) is replaced by a PWM current source inverter (CSI) for its voltage boosting capabilities, inherent short-circuit proof and higher reliability features. Modeling, design, and analysis of the considered CSI are presented altogether with enhanced proposed control loops aided with a modified PWM technique. DC-link even current harmonics are commonly reflected as low-order odd harmonics in the grid resulting in a poor quality grid current. In order to overcome the latter, a high performance proportional resonant controller, applied in the inverter inner grid current loop, is proposed using cascaded resonant control units tuned at low-order frequencies to eliminate injected grid current harmonics. Hence, with a less-bulky smoothing inductor at the CSI DC-side, grid power quality and system efficiency are simultaneously improved. Simulation and experimental results verify the proposed controller effectiveness.

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