scholarly journals Single-phase photovoltaic grid-connected inverter for predictive control method with power feed-forward

2019 ◽  
Vol 354 ◽  
pp. 012086
Author(s):  
Y M Pei ◽  
L Xiong ◽  
D J Zhang ◽  
H M Liu ◽  
Y J Zhu
Keyword(s):  
Predictive Control ◽  
Single Phase ◽  
Control Method ◽  
Feed Forward ◽  
Grid Connected Inverter

Single-Phase Grid-Connected PV System Based on Multi-Carrier PWM and Power Feed-Forward

2011 ◽  
Vol 347-353 ◽  
pp. 763-769
Author(s):  
Qin Jin Zhang ◽  
Yan Cheng Liu ◽  
Chuan Wang
Keyword(s):  
Dynamic Response ◽  
Single Phase ◽  
Control Method ◽  
High Harmonic ◽  
Harmonic Distortion ◽  
Input Power ◽  
Pv System ◽  
Forward Algorithm ◽  
Feed Forward ◽  
Grid Current

In the traditional single-phase grid-connected photovoltaic(PV) system, the output grid-current has the shortcomings of high harmonic distortion rate and slow dynamic response. In order to solve these problems, an improved method on the inverter is proposed. The inverter consists of full-bridge circuit and auxiliary circuit. With the multi-carrier PWM, the inverter produces output voltages in five levels, which can reduce the THD of the grid current. At the same time , this paper presents the power feed-forward algorithm based on traditional control method. The output power of PV array is added to the reference of current close-loop as power feed-forward, which improves the dynamic response to the input power changes. At last, the simulation results show the effectiveness of the proposed method.

scholarly journals A Control Strategy of a Single-phase H6-type Grid-connected Inverter with Low Harmonic Current

2018 ◽  
Vol 173 ◽  
pp. 02041
Author(s):  
Lin Chunxu ◽  
Zhou Chunhua ◽  
Li Wei ◽  
Chen Rui
Keyword(s):  
Control Strategy ◽  
Single Phase ◽  
Closed Loop ◽  
High Efficiency ◽  
Control Method ◽  
Harmonic Distortion ◽  
Outer Loop ◽  
Lcl Filter ◽  
Loop Control ◽  
Grid Connected Inverter

In order to reduce the total harmonic distortion (THD) of the grid-connected current caused by the high-frequency switching of the inverter, this paper combines the high efficiency single-phase H6-type inverter with LCL filter. The double closed-loop control method that consists of grid-connected current outer loop and capacitor current inner loop is put forward, by which a resonance peak of a low damping LCL filter is eliminated. In the grid-connected current outer loop, quasi proportion resonant (QPR) controller is adopted to overcome the steady-state error and weak anti-jamming capability in traditional PI controller. Finally, a simulation model is built in SIMULINK to verify the research. The simulation results show that, based on the single-phase H6-type inverter and LCL filter, the double closed-loop QPR control strategy can achieve the static error free tracking control of grid-connected current, which makes the system more stable and reduces the THD of grid-connected current effectively.

Sign in / Sign up

Export Citation Format

Share Document