TY - JOUR
T1 - High Quality Model Predictive Control for Single Phase Grid-Connected Photovoltaic Inverters
AU - Zangeneh Bighash, Esmaeil
AU - Sadeghzadeh, Seyed Mohammad
AU - Ebrahimzadeh, Esmaeil
AU - Blaabjerg, Frede
PY - 2018/5
Y1 - 2018/5
N2 - Single phase grid-connected inverters with LCL filter are widely used to connect the photovoltaic systems to the utility grid. Among the presented control schemes, predictive control methods are faster and more accurate but are more complex to implement. Recently, the model-predictive control algorithm for single-phase inverter has been presented, where the algorithm implementation is straightforward. In the proposed approach, all switching states are tested in each switching period to achieve the control objectives. However, since the number of the switching states in single-phase inverter is low, the inverter output current has a high total harmonic distortions. In order to reduce the total harmonic distortions of the injected current, this paper presents a high-quality model-predictive control for one of the newest structure of the grid connected photovoltaic inverter, i.e., HERIC inverter with LCL filter. In the proposed approach, the switching algorithm is changed and the number of the switching states is increased by some virtual vectors. Simulation results show that the proposed approach lead to a lower total harmonic distortions in the injected current along with a fast dynamic response. The proposed predictive control has been simulated and implemented in a 1 kW single-phase HERIC inverter with LCL filter at the output.
AB - Single phase grid-connected inverters with LCL filter are widely used to connect the photovoltaic systems to the utility grid. Among the presented control schemes, predictive control methods are faster and more accurate but are more complex to implement. Recently, the model-predictive control algorithm for single-phase inverter has been presented, where the algorithm implementation is straightforward. In the proposed approach, all switching states are tested in each switching period to achieve the control objectives. However, since the number of the switching states in single-phase inverter is low, the inverter output current has a high total harmonic distortions. In order to reduce the total harmonic distortions of the injected current, this paper presents a high-quality model-predictive control for one of the newest structure of the grid connected photovoltaic inverter, i.e., HERIC inverter with LCL filter. In the proposed approach, the switching algorithm is changed and the number of the switching states is increased by some virtual vectors. Simulation results show that the proposed approach lead to a lower total harmonic distortions in the injected current along with a fast dynamic response. The proposed predictive control has been simulated and implemented in a 1 kW single-phase HERIC inverter with LCL filter at the output.
KW - Total harmonic distortion (THD)
KW - Model-predictive control (MPC)
KW - High-quality model-predictive control (HQMPC)
KW - Pulse width modulation (PWM)
KW - Highly Efficient and Reliable Inverter Concept (HERIC)
UR - http://www.scopus.com/inward/record.url?scp=85041407211&partnerID=8YFLogxK
U2 - 10.1016/j.epsr.2018.01.001
DO - 10.1016/j.epsr.2018.01.001
M3 - Journal article
SN - 0378-7796
VL - 158
SP - 115
EP - 125
JO - Electric Power Systems Research
JF - Electric Power Systems Research
ER -