An Integrating Structure of Output Filter for Grid Connected Inverter Based on FMLF Technique

2018 ◽  
Author(s):  
Jie Ma ◽  
Yenan Chen ◽  
PingPing Chen ◽  
Wenxing Zhong ◽  
Dehong Xu
Keyword(s):  
Grid Connected Inverter ◽  
Output Filter

scholarly journals Modeling and Enhanced Error-Free Current Control Strategy for Inverter with Virtual Resistor Damping

Energies ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2499 ◽  
Author(s):  
Cheng Nie ◽  
Yue Wang ◽  
Wanjun Lei ◽  
Tian Li ◽  
Shiyuan Yin
Keyword(s):  
Design Method ◽  
Current Control ◽  
Simplified Model ◽  
Output Current ◽  
Control Precision ◽  
Harmonic Components ◽  
Grid Connected Inverter ◽  
Free Current ◽  
Output Filter ◽  
Compensation Design

In microgrid, the grid-connected inverter current with the LCL (inductor-capacitor-inductor) output filter is amplified at certain frequencies. Using virtual resistor damping method can help suppress the amplification. By choosing an appropriate virtual resistor value, the model of the inverter current control loop is simplified as a 2nd-order lowpass filter. Based on such simplified model, this paper proposes a design method of reference current compensation controller, which does not require decomposition of harmonic components. With the reference compensation, the inverter output current control precision is improved obviously. The simulation and experimental results verify the accuracy of the inverter simplified model and effectiveness of the reference compensation design method.

scholarly journals A Modified Grid-Connected Inverter Topology for Power Oscillation Suppression under Unbalanced Grid Voltage Faults

Energies ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 5057
Author(s):  
Cheng Luo ◽  
Xikui Ma ◽  
Lihui Yang ◽  
Yongming Li ◽  
Xiaoping Yang ◽  
...  
Keyword(s):  
Output Power ◽  
Output Current ◽  
Grid Voltage ◽  
Power Oscillation ◽  
Power Simulation ◽  
Point Of Common Coupling ◽  
In Series ◽  
Grid Connected Inverter ◽  
Output Filter ◽  
Unbalanced Grid

Under unbalanced grid voltage faults, the output power oscillation of a grid-connected inverter is an urgent problem to be solved. In the traditional topology of inverters, it is impossible to eliminate power oscillation and simultaneously maintain balanced output current waveform. In this paper, considering the solvability of reference current matrix equation, the inherent mechanism of inverter output power oscillation is analyzed, and a modified topology with auxiliary modules inserted in series between the inverter output filter and the point of common coupling (PCC) is proposed. Due to the extra controllable freedoms provided by auxiliary modules, the inverter could generate extra voltage to correct PCC voltage while keeping balance of output current, so as to eliminate the oscillation of output power. Simulation and experimental results verify the effectiveness of the proposed topology.

scholarly journals Stability of Grid-Connected Inverter with LCL Filter

2020 ◽  
Vol 5 (4) ◽  
pp. 91-96
Author(s):  
Marek Pástor ◽  
Jaroslav Dudrik
Keyword(s):  
Single Phase ◽  
Active Damping ◽  
Lcl Filter ◽  
Resonant Controller ◽  
Grid Connected Inverter ◽  
Output Filter

<p>The paper analyses oscillations in a single-phase grid connected inverter with the LCL output filter. Passive and active damping techniques are designed and compared by simulations. The inverter is controlled by a proportional resonant controller.</p>

An Optimization Design of Output Filter in a Grid Connected Inverter With Flexible Multilayer Foil Technique

2019 ◽  
Vol 34 (1) ◽  
pp. 221-231 ◽  
Author(s):  
Jie Ma ◽  
Wenxing Zhong ◽  
Pingping Chen ◽  
Yenan Chen ◽  
Dehong Xu
Keyword(s):  
Optimization Design ◽  
Grid Connected Inverter ◽  
Output Filter ◽  
Foil Technique

Phase-Locked Loop Using Complex-Coefficient Filters for Grid-Connected Inverter

2013 ◽  
Vol 133 (4) ◽  
pp. 388-394 ◽  
Author(s):  
Akihiro Ohori ◽  
Nobuyuki Hattori ◽  
Tsuyoshi Funaki
Keyword(s):  
Phase Locked Loop ◽  
Complex Coefficient ◽  
Grid Connected Inverter

DC to Single-Phase AC Grid Connected Inverter with Boost Type Active Buffer Circuit Operated in Discontinuous Current Mode

2018 ◽  
Vol 138 (5) ◽  
pp. 453-462
Author(s):  
Jun-ichi Itoh ◽  
Tomokazu Sakuraba ◽  
Hoai Nam Le ◽  
Hiroki Watanabe ◽  
Keisuke Kusaka
Keyword(s):  
Single Phase ◽  
Current Mode ◽  
Grid Connected Inverter

Model predictive flexible power control for grid-connected inverter under unbalanced network

2020 ◽  
Vol 13 (16) ◽  
pp. 3580-3589 ◽  
Author(s):  
Bihua Hu ◽  
Zhiyong Chen ◽  
Zhi Zhang ◽  
Siyan Liu ◽  
Wenlang Deng
Keyword(s):  
Power Control ◽  
Grid Connected Inverter ◽  
Unbalanced Network
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