TY - GEN
T1 - A combination of VSG and amended fractional-order repetitive control for improving power quality of grid-connected inverter
AU - Kazemi, Hamed Mohammad
AU - Afjei, Ebrahim
AU - Rahmati, Ali
PY - 2019/5
Y1 - 2019/5
N2 - Nowadays, in the modern power systems, due to increasing the application of renewable energy sources, power inverters are most commonly used electronic devices in the energy systems for ac/dc power conversion. Since the standard power inverters have extremely low inertia elements, the modern power systems meet insufficiency inertia to maintain the grid stability. In virtual synchronous generator (VSG) technique, virtual inertia is emulated in the power inverters by implementing swing equation and as a result, grid inertia is increased and grid stability will be satisfied. Although grid inertia issue is solved by VSG control, dealing with some power quality problems, such as grid current harmonic, which occurs in bad situations, has not been considered in this control theory. In this paper, a control approach based on a combination of VSG technique and amended fractional-order repetitive control (AFORC) is presented for grid-connected inverters to cope with the mentioned problem. The results of simulation studies proved that the proposed method besides fulfilling the main VSG objectives, such as transient frequency response enhancement and increasing total inertia of the power systems, it also can extremely diminish harmonic components of the current injected to the grid in the presence of distorted grid voltage and unbalanced nonlinear rectifier loads.
AB - Nowadays, in the modern power systems, due to increasing the application of renewable energy sources, power inverters are most commonly used electronic devices in the energy systems for ac/dc power conversion. Since the standard power inverters have extremely low inertia elements, the modern power systems meet insufficiency inertia to maintain the grid stability. In virtual synchronous generator (VSG) technique, virtual inertia is emulated in the power inverters by implementing swing equation and as a result, grid inertia is increased and grid stability will be satisfied. Although grid inertia issue is solved by VSG control, dealing with some power quality problems, such as grid current harmonic, which occurs in bad situations, has not been considered in this control theory. In this paper, a control approach based on a combination of VSG technique and amended fractional-order repetitive control (AFORC) is presented for grid-connected inverters to cope with the mentioned problem. The results of simulation studies proved that the proposed method besides fulfilling the main VSG objectives, such as transient frequency response enhancement and increasing total inertia of the power systems, it also can extremely diminish harmonic components of the current injected to the grid in the presence of distorted grid voltage and unbalanced nonlinear rectifier loads.
KW - harmonic suppression
KW - power quality
KW - repetitive control
KW - virtual inertia
KW - virtual synchronous generator
UR - http://www.scopus.com/inward/record.url?scp=85070458767&partnerID=8YFLogxK
U2 - 10.1109/EPE.2019.8778191
DO - 10.1109/EPE.2019.8778191
M3 - Conference contribution
AN - SCOPUS:85070458767
T3 - Proceedings of the 2019 20th International Scientific Conference on Electric Power Engineering, EPE 2019
BT - Proceedings of the 2019 20th International Scientific Conference on Electric Power Engineering, EPE 2019
A2 - Rusek, Stanislav
A2 - Gono, Radomir
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 20th International Scientific Conference on Electric Power Engineering, EPE 2019
Y2 - 15 May 2019 through 17 May 2019
ER -
