TY - JOUR
T1 - Faster Convergence Controller With Distorted Grid Conditions for Photovoltaic Grid Following Inverter System
AU - Singh, Jitendra Kumar
AU - Jaafari, Khaled Al
AU - Behera, Ranjan Kumar
AU - Hosani, Khalifa Al
AU - Muduli, Utkal Ranjan
N1 - Funding Information:
This work was supported in part by the Visvesvaraya Ph.D. Scheme, Ministry of Electronics and Information Technology (MeitY), Government of India, under Award MEITY-PHD-2533; in part by Khalifa University under Award KKJRC-2019-Trans2; and in part by the Advanced Technology Research Council ASPIRE Virtual Research Institute (VRI) Program, Abu Dhabi, United Arab Emirates, under Award VRI20-07.
Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - The hysteresis current controller (HCC) for grid following inverter (GFI) system with LCL -filter is a well-known controller for its robustness, fast reference tracking, better dynamics, and easier implementation compared to other controllers. However, HCC behaves differently while integrating such a system with solar photovoltaics (PV). The PV-based GFI system requires fast convergence while transferring maximum power from PV to the grid at minimum converter losses through GFI. This paper therefore proposes a modified double-band HCC (MDBHCC) with proportional resonant (PR) controller for single-phase PV integrated GFI system with LCL-filter. The proposed algorithm implements a unipolar symmetrical PWM strategy for reducing inverter switching losses through a sequential logic with an adaptive clock. It improves the variation in switching frequency and limits the maximum switching frequency of HCC while enhancing the total harmonic distortion (THD) of the injected current into the grid at the point of common coupling. To alleviate the power quality problem and achieve zero steady state error, the proposed MDBHCC with PR control operates at lesser % THD. Simulation and experimental results are presented, with a significant decrease in switching frequency and an improvement in grid current harmonics at both steady-state and dynamic conditions.
AB - The hysteresis current controller (HCC) for grid following inverter (GFI) system with LCL -filter is a well-known controller for its robustness, fast reference tracking, better dynamics, and easier implementation compared to other controllers. However, HCC behaves differently while integrating such a system with solar photovoltaics (PV). The PV-based GFI system requires fast convergence while transferring maximum power from PV to the grid at minimum converter losses through GFI. This paper therefore proposes a modified double-band HCC (MDBHCC) with proportional resonant (PR) controller for single-phase PV integrated GFI system with LCL-filter. The proposed algorithm implements a unipolar symmetrical PWM strategy for reducing inverter switching losses through a sequential logic with an adaptive clock. It improves the variation in switching frequency and limits the maximum switching frequency of HCC while enhancing the total harmonic distortion (THD) of the injected current into the grid at the point of common coupling. To alleviate the power quality problem and achieve zero steady state error, the proposed MDBHCC with PR control operates at lesser % THD. Simulation and experimental results are presented, with a significant decrease in switching frequency and an improvement in grid current harmonics at both steady-state and dynamic conditions.
KW - GFI
KW - hysteresis current control
KW - LCL filter
KW - power quality improvement
KW - total harmonic distortion
UR - http://www.scopus.com/inward/record.url?scp=85126515683&partnerID=8YFLogxK
U2 - 10.1109/ACCESS.2022.3159476
DO - 10.1109/ACCESS.2022.3159476
M3 - Article
AN - SCOPUS:85126515683
SN - 2169-3536
VL - 10
SP - 29834
EP - 29845
JO - IEEE Access
JF - IEEE Access
ER -
