TY - JOUR
T1 - A New Kalman-Filter-Based Harmonic Current Suppression Method for the Virtual Oscillator Controlled Grid-Tied Inverter
AU - Luo, Siyi
AU - Wu, Weimin
AU - Koutroulis, Eftichios
AU - Chung, Henry Shu-hung
AU - Blaabjerg, Frede
PY - 2022/3
Y1 - 2022/3
N2 - Virtual Oscillator Control (VOC) is an advanced nonlinear grid-forming controller used for power electronics interfaced distributed generation (DG). In order to improve the reliability of voltage source converter connecting to the disturbance grid, a feedback method with enhanced virtual impedance had been inserted into the control loop of the VOC-based inverter to suppress grid-injected harmonic currents. In this paper, a new grid-injected harmonic current suppression strategy with estimated voltage feedforward is proposed for a VOC-based voltage source inverter (VSI) connected to the distorted electrical grid. To achieve the control target, the Kalman-Filter is adopted to estimate the harmonic components of the grid voltage at the point of common coupling (PCC) and insert them to the feedforward control loop of the VOC-based inverter. Compared with the traditional VOC with enhanced virtual impedance method, the proposed control strategy has a slightly better ability to suppress the grid-injected harmonic current. A 3 kW/3-phase/120 V experimental prototype system designed on the DSPACE DS1202 platform has been developed to verify the effectiveness of the proposed control strategy.
AB - Virtual Oscillator Control (VOC) is an advanced nonlinear grid-forming controller used for power electronics interfaced distributed generation (DG). In order to improve the reliability of voltage source converter connecting to the disturbance grid, a feedback method with enhanced virtual impedance had been inserted into the control loop of the VOC-based inverter to suppress grid-injected harmonic currents. In this paper, a new grid-injected harmonic current suppression strategy with estimated voltage feedforward is proposed for a VOC-based voltage source inverter (VSI) connected to the distorted electrical grid. To achieve the control target, the Kalman-Filter is adopted to estimate the harmonic components of the grid voltage at the point of common coupling (PCC) and insert them to the feedforward control loop of the VOC-based inverter. Compared with the traditional VOC with enhanced virtual impedance method, the proposed control strategy has a slightly better ability to suppress the grid-injected harmonic current. A 3 kW/3-phase/120 V experimental prototype system designed on the DSPACE DS1202 platform has been developed to verify the effectiveness of the proposed control strategy.
KW - Harmonic current suppression
KW - impedance analysis
KW - grid-tied inverter
KW - virtual oscillator control
UR - http://www.scopus.com/inward/record.url?scp=85122874101&partnerID=8YFLogxK
U2 - 10.1109/JETCAS.2022.3141106
DO - 10.1109/JETCAS.2022.3141106
M3 - Journal article
SN - 2156-3357
VL - 12
SP - 251
EP - 259
JO - I E E E Journal on Emerging and Selected Topics in Circuits and Systems
JF - I E E E Journal on Emerging and Selected Topics in Circuits and Systems
IS - 1
M1 - 9673767
ER -