Modeling and Control of $N$ -Paralleled Grid-Connected Inverters With LCL Filter Coupled Due to Grid Impedance in PV Plants

2011 ◽  
Vol 26 (3) ◽  
pp. 770-785 ◽  
Author(s):  
Juan Luis Agorreta ◽  
Mikel Borrega ◽  
Jesús López ◽  
Luis Marroyo
Keyword(s):  
Lcl Filter ◽  
Modeling And Control ◽  
Grid Impedance ◽  
And Control

Modeling and Control of a Single-Phase Grid-Connected Inverter with LCL Filter

2021 ◽  
Vol 19 (02) ◽  
pp. 250-259
Author(s):  
Jakson Paulo Bonaldo ◽  
Jose de Arimateia Olimpio Filho ◽  
Augusto Matheus dos Santos Alonso ◽  
Helmo Kelis Morales Paredes ◽  
Fernando Pinhabel Marafao
Keyword(s):  
Single Phase ◽  
Lcl Filter ◽  
Modeling And Control ◽  
Grid Connected Inverter ◽  
And Control

A review on modeling and control of grid-connected photovoltaic inverters with LCL filter

2018 ◽  
Vol 81 ◽  
pp. 563-578 ◽  
Author(s):  
Mohammad Hossein Mahlooji ◽  
Hamid Reza Mohammadi ◽  
Mohsen Rahimi
Keyword(s):  
Lcl Filter ◽  
Modeling And Control ◽  
And Control

A Hybrid Damping Method for LCL-Filter Based Grid-Tied Inverter

2015 ◽  
Vol 734 ◽  
pp. 805-810
Author(s):  
Lan Ma ◽  
Hong Bing Xu ◽  
Jian Xiao Zou ◽  
Meng Shu Li ◽  
Tao Han
Keyword(s):  
System Stability ◽  
Long Distance ◽  
Lcl Filter ◽  
Control Loops ◽  
Grid Impedance ◽  
Grid Side ◽  
Strategy Design ◽  
And Control ◽  
Hybrid Damping

With more and more distributed renewable energy connecting to the power system, inverters are widely used as the power electronic interface. However, high-order filters will inevitably bring in problems of resonance. Additionally, long-distance transmission and quantities of inverters increase the grid impedance obviously. Wide variation of grid impedance will not only impact on the resonance of filters, but also challenge stability of inverters system. This paper investigates how resonance and stability of grid-tied inverter with LCL-filter will be affected by the grid impedance. And a hybrid damping method based on RC parallel damper and biquad digital filter is proposed, this method presents relatively low power losses, requires no extra sensors and control loops with its simple damping strategy design. Moreover, it apparently improves system stability and waveform quality of grid-side current when grid impedance varies in a comparatively large range. Both validity and feasibility of this algorithm are verified via simulations.

Research on Modeling and Control Strategy for Two-Stage Photovoltaic Grid-Connected System

2014 ◽  
Vol 1008-1009 ◽  
pp. 16-21
Author(s):  
Xia Dong ◽  
Li Na Zhang ◽  
Yu Ying Fu ◽  
Cui Lian Ji
Keyword(s):  
Control Strategy ◽  
High Performance ◽  
Dynamic Performance ◽  
Mathematic Model ◽  
Two Stage ◽  
Lcl Filter ◽  
Modeling And Control ◽  
Point Tracking ◽  
Power Point ◽  
And Control

This paper has built the mathematic model of the single-phase two-stage photovoltaic(PV) grid-connected system. The model consists of a boost DC/DC converter and a DC/AC inverter with LCL filter. On the basis of the variable step perturbation and observation method(P&O), the boost converter changes the output voltage of the PV array by adjusting the duty cycle to realize the PV maximum power point tracking(MPPT). The inverter system restrains the voltage fluctuation effectively by using feed-forward of the grid voltage and current tracking control technology, which has the high performance in both sinusoidal reference tracking and disturbance rejection. LCL filter improves the dynamic performance and restrains the high harmonics efficiently. The simulation with Matlab soft confirms the effectiveness of the model and control strategy.

scholarly journals Modeling and Control Parameters Design for Grid-Connected Inverter System Considering the Effect of PLL and Grid Impedance

IEEE Access ◽  
2020 ◽  
Vol 8 ◽  
pp. 40474-40484 ◽  
Author(s):  
Zhiwei Xie ◽  
Yandong Chen ◽  
Wenhua Wu ◽  
Yuancan Xu ◽  
Haining Wang ◽  
...  
Keyword(s):  
Control Parameters ◽  
Modeling And Control ◽  
Grid Impedance ◽  
Grid Connected Inverter ◽  
And Control
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