TY - GEN
T1 - Current vector control based on average capacitor voltage strategy and hybrid modulation applied to the control of a 7-level PUC three-phase inverter
AU - Onizuka, Marcela Vilalba
AU - Garcia, Raymundo Cordero
AU - Pinto, Joao Onofre Pereira
AU - Borges Da Silva, Luiz Eduardo
N1 - Publisher Copyright:
© 2016 IEEE.
PY - 2016
Y1 - 2016
N2 - This paper presents a vector control system for the control of the capacitor voltages of a 7-level Packed-U-Cell (PUC) three-phase inverter. Usually, PUCs in a three-phase system are controlled as isolated systems. As a result, three voltage loop and three load current loops are required to control the capacitor voltage in each PUC. Additionally, conventional approach requires the tracking of sinusoidal references. This paper proposes a different approach. A single voltage loop is designed to control the average voltage of the capacitor. This loop defines the required tf-axis load current, while the required q-axis load current is set to zero. Two current controllers generate the voltage references to get the required dq currents. Those voltages are produced through hybrid modulation (HPWM). As a result, only three control loops are needed to control the capacitor voltages. The proposed approach reduces the computational cost of the PUC controller, makes easier the control tuning, and the current control improves, due to the steady-state dq load current referents are almost constants, which are easier to track than sinusoidal references. Simulation results show that the proposed vector control for a three-phase PUC inverter is accurate and robust against parameter variation.
AB - This paper presents a vector control system for the control of the capacitor voltages of a 7-level Packed-U-Cell (PUC) three-phase inverter. Usually, PUCs in a three-phase system are controlled as isolated systems. As a result, three voltage loop and three load current loops are required to control the capacitor voltage in each PUC. Additionally, conventional approach requires the tracking of sinusoidal references. This paper proposes a different approach. A single voltage loop is designed to control the average voltage of the capacitor. This loop defines the required tf-axis load current, while the required q-axis load current is set to zero. Two current controllers generate the voltage references to get the required dq currents. Those voltages are produced through hybrid modulation (HPWM). As a result, only three control loops are needed to control the capacitor voltages. The proposed approach reduces the computational cost of the PUC controller, makes easier the control tuning, and the current control improves, due to the steady-state dq load current referents are almost constants, which are easier to track than sinusoidal references. Simulation results show that the proposed vector control for a three-phase PUC inverter is accurate and robust against parameter variation.
KW - Average capacitor voltage
KW - PUC
KW - hybrid modulation
KW - vector control
UR - http://www.scopus.com/inward/record.url?scp=85015322602&partnerID=8YFLogxK
U2 - 10.1109/SPEC.2016.7846152
DO - 10.1109/SPEC.2016.7846152
M3 - Conference contribution
AN - SCOPUS:85015322602
T3 - 2016 IEEE 2nd Annual Southern Power Electronics Conference, SPEC 2016
BT - 2016 IEEE 2nd Annual Southern Power Electronics Conference, SPEC 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2nd IEEE Annual Southern Power Electronics Conference, SPEC 2016
Y2 - 5 December 2016 through 8 December 2016
ER -