TY - JOUR
T1 - Improved Direct Power Control for Grid-Connected Voltage Source Converters
AU - Gui, Yonghao
AU - Kim, Chunghun
AU - Chung, Chung Choo
AU - Guerrero, Josep M.
AU - Guan, Yajuan
AU - Quintero, Juan Carlos Vasquez
PY - 2018/10
Y1 - 2018/10
N2 - A novel grid voltage modulated direct power control (GVM-DPC) strategy for a grid-connected voltage source converter is proposed to control the instantaneous active and reactive powers directly. The GVM-DPC method consists of a nonlinear GVM controller, a conventional controller (feedforward and PI feedback), and nonlinear damping. The proposed control strategy shows a relationship between DPC and voltage-oriented control methods designed in d-q frame. The main advantage is that the proposed method makes the system be a linear time-invariant system, which enables us to apply various control methods easily. The GVM-DPC guarantees not only the convergence rate but also the steady-state performance of the system. Moreover, it is ensured that the closed-loop system is exponentially stable. Finally, simulation and experimental results using a 2.2-kVA VSC are provided to validate the tracking performance and robustness of the proposed control architecture. In addition, the total harmonic distortion of the current is 1.9% which is much less than the requirement for grid operation.
AB - A novel grid voltage modulated direct power control (GVM-DPC) strategy for a grid-connected voltage source converter is proposed to control the instantaneous active and reactive powers directly. The GVM-DPC method consists of a nonlinear GVM controller, a conventional controller (feedforward and PI feedback), and nonlinear damping. The proposed control strategy shows a relationship between DPC and voltage-oriented control methods designed in d-q frame. The main advantage is that the proposed method makes the system be a linear time-invariant system, which enables us to apply various control methods easily. The GVM-DPC guarantees not only the convergence rate but also the steady-state performance of the system. Moreover, it is ensured that the closed-loop system is exponentially stable. Finally, simulation and experimental results using a 2.2-kVA VSC are provided to validate the tracking performance and robustness of the proposed control architecture. In addition, the total harmonic distortion of the current is 1.9% which is much less than the requirement for grid operation.
KW - Direct power control
KW - DC-AC power converters
KW - linear time-invariant system
KW - exponentially stable
UR - http://www.scopus.com/inward/record.url?scp=85042095494&partnerID=8YFLogxK
U2 - 10.1109/TIE.2018.2801835
DO - 10.1109/TIE.2018.2801835
M3 - Journal article
SN - 0278-0046
VL - 65
SP - 8041
EP - 8051
JO - I E E E Transactions on Industrial Electronics
JF - I E E E Transactions on Industrial Electronics
IS - 10
ER -