A Current Control Strategy for Three-Phase PV Power System with Low-Voltage Ride-Through

2012 ◽  
Author(s):  
Yong-Sih Wu ◽  
Yung-Ruei Chang ◽  
Chia-His Chang ◽  
Chih-Wen Liu ◽  
Yaow-Ming Chen
Keyword(s):  
Power System ◽  
Control Strategy ◽  
Low Voltage ◽  
Current Control ◽  
Low Voltage Ride Through ◽  
Three Phase ◽  
A Current

scholarly journals Topology and Control Strategy of PV MVDC Grid-Connected Converter with LVRT Capability

2021 ◽  
Vol 11 (6) ◽  
pp. 2739
Author(s):  
Huan Wang ◽  
Yu Zhou ◽  
Xinke Huang ◽  
Yibo Wang ◽  
Honghua Xu
Keyword(s):  
Control Strategy ◽  
Control Method ◽  
Low Voltage ◽  
Current Control ◽  
Medium Voltage ◽  
Low Voltage Ride Through ◽  
Feedback Capacitor ◽  
Lc Filter ◽  
And Control ◽  
Medium Voltage Dc

This paper proposes an isolated buck-boost topology and control strategy for the photovoltaic (PV) medium-voltage DC (MVDC) converter with low-voltage ride through (LVRT) capability. The proposed isolated buck-boost topology operates on either boost or buck mode by only controlling the active semiconductors on the low-voltage side. Based on this topology, medium-voltage (MV) dc–dc module is able to be developed to reduce the number of modules and increase the power density in the converter, which corresponds to the first contribution. As another contribution, a LVRT method based on an LC filter for MVDC converter is proposed without additional circuit and a feedback capacitor current control method for the isolated buck-boost converter is proposed to solve the instability problem caused by the resonance spike of the LC filter. Five kV/50 kW SiC-based dc–dc modules and ±10 kV/200 kW PV MVDC converters were developed. Experiments of the converter for MVDC system in the normal and LVRT conditions are presented. The experimental results verify the effectiveness of the proposed topology and control strategy.

scholarly journals Low-voltage ride-through for a three-phase four-leg photovoltaic system using SRFPI control strategy

2019 ◽  
Vol 9 (3) ◽  
pp. 1524
Author(s):  
Haval Sardar Kamil ◽  
Dalila Mat Said ◽  
Mohd Wazir Mustafa ◽  
Mohammad Reza Miveh ◽  
Nasarudin Ahmad
Keyword(s):  
Control Strategy ◽  
Power Plants ◽  
Low Voltage ◽  
Photovoltaic System ◽  
Electrical Grid ◽  
Low Voltage Ride Through ◽  
Power Stations ◽  
Pv Inverter ◽  
Synchronous Reference Frame ◽  
Three Phase

With the innovative progresses in power electronics in recent years, photovoltaic (PV) systems emerged as one of the promising sources for electricity generation at the distribution network. Nonetheless, connection of PV power plants to the utility grid under abnormal conditions has become a significant issue and novel grid codes should be recommend. The low-voltage ride-through (LVRT) capability is one of the challenges faced by the integration of PV power stations into electrical grid under abnormal conditions. This work firstly provides a discussion on recent control schemes for PV power plants to enhance the LVRT capabilities. Next, a control scheme for a three-phase four-leg grid-connected PV inverter under unbalanced grid fault conditions using synchronous reference frame proportional integral (SRFPI) controller is proposed. Simulation studies are performed to investigate the influence of the control strategy on the PV inverter.

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