Advanced Control Strategy with Voltage Sag Classification for Single-Phase Grid-Connected Photovoltaic System

2020 ◽  
pp. 1-1
Author(s):  
Mohammed Ali Khan ◽  
Ahteshamul Haque ◽  
V S Bharath Kurukuru ◽  
Mekhilef Saad
Keyword(s):  
Control Strategy ◽  
Single Phase ◽  
Photovoltaic System ◽  
Voltage Sag ◽  
Advanced Control

Asymmetric Voltage Sag Control Strategy for Grid-Connected PV System Based on PIR Controller

2013 ◽  
Vol 724-725 ◽  
pp. 128-131
Author(s):  
Fei Zheng ◽  
Xiao Lin Zhang ◽  
Ming Chang Ding
Keyword(s):  
Control Strategy ◽  
Control Strategies ◽  
Dynamic Performance ◽  
Photovoltaic System ◽  
Voltage Sag ◽  
Dynamic Adjustment ◽  
Pv System ◽  
Current Controller ◽  
Sequence Components ◽  
Fault State

This paper proposes an improved LVRT control strategy based on PIR controller for grid-connected photovoltaic system under asymmetric voltage sag fault. First, the PIR current controller is designed in the positive synchronous frame without the need to decompose the positive and negative sequence components and the dynamic adjustment method for the current-reference calculation is given in order to gain a constant active power. And then, the principle how control strategies switching between the one in normal state and the other one in fault state is revealed in detail. Finally, simulations and experiment test on a 500kVA grid-connected photovoltaic inverter verify that this control strategy achieves good dynamic performance and it improves the PV inverters’ capacity of riding through asymmetric voltage sag fault effectively.

scholarly journals Advanced Control Strategy for Single–Phase Voltage–Source Active Rectifier with Low Harmonic Emission

2014 ◽  
Vol 65 (2) ◽  
pp. 121-124 ◽  
Author(s):  
Vojtĕch Blahník ◽  
Zdenĕk Peroutka ◽  
Jakub Talla
Keyword(s):  
Control Strategy ◽  
Single Phase ◽  
Supply Voltage ◽  
Low Frequency ◽  
Voltage Source ◽  
Phase Voltage ◽  
Active Rectifier ◽  
Advanced Control ◽  
Pr Controller ◽  
Frequency Harmonic

Abstract This paper introduces the advanced control of single-phase voltage-source active rectifier. This control provide direct control of trolley-wire current and active damping of low-frequency disturbances at the converter ac side. Our proposed control strategy combines PR controller with feed-forward model and low-frequency harmonic compensator based on resonant controllers. Achieved experimental results show excellent converter behavior, where converter is fed by strongly distorted supply voltage.

Grid-Connected Control Strategy Based on Fixed Mi Coefficient for Single-Phase Photovoltaic System

2014 ◽  
Vol 494-495 ◽  
pp. 1764-1770
Author(s):  
Wen Jie Zhu ◽  
Fei Rong ◽  
An Luo ◽  
Yong Xu ◽  
An Ping Hu
Keyword(s):  
Control Strategy ◽  
Single Phase ◽  
Closed Loop ◽  
Harmonic Distortion ◽  
Photovoltaic System ◽  
Voltage Source ◽  
Harmonic Suppression ◽  
Pv System ◽  
Simulation And Experiment ◽  
The Stability

This paper presents a grid-connected control strategy for single-phase photovoltaic (PV) system. Voltage source inverter (VSI) of a PV system is a core component which will produce some harmonics when the switch is operated between on and off continuously. To suppress harmonic distortion in the VSI output current, a fixed modulation index (MI) control loop based on PI controller is added to the traditional double closed-loop. The proposed method can fix the MI coefficient to be a large value in any conditions. The design of the controller and the stability of the grid-connected system are discussed in detail. Simulation and experiment results are presented to demonstrate the dynamic and precision performance of the controller for harmonic suppression when the proposed PV system is connected to the grid.

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