TY - GEN
T1 - Wideband Dissipativity Enhancement for Multi-Sampling Controlled Grid-Following VSCs
AU - He, Shan
AU - Yang, Zhiqing
AU - Zhou, Dao
AU - Wang, Xiongfei
AU - De Doncker, Rik W.
AU - Blaabjerg, Frede
PY - 2022/12/1
Y1 - 2022/12/1
N2 - With the gradually decreasing cost of high-performance digital processors, multi-sampling current control is a promising method to reduce the control delay and improve the high-frequency dissipativity in grid-connected converters. Specifically, with the capacitor voltage feedforward and the inverter-side current feedback, the dissipation of the multi-sampling current control can be extended up to the switching frequency. However, if the effect of phase-locked loop is considered, a non-dissipative region is still inevitable in the low-frequency area, which leads to a risk of destabilization for weak grid operations. To tackle this challenge, a virtual damping control scheme is proposed in this paper, and the non-dissipative region in the d-axis and the q-axis can be reduced to a specific range, respectively. Moreover, the transient performance is also improved compared with the conventional virtual damping method. Finally, the effectiveness of the proposed method is verified through the simulations.
AB - With the gradually decreasing cost of high-performance digital processors, multi-sampling current control is a promising method to reduce the control delay and improve the high-frequency dissipativity in grid-connected converters. Specifically, with the capacitor voltage feedforward and the inverter-side current feedback, the dissipation of the multi-sampling current control can be extended up to the switching frequency. However, if the effect of phase-locked loop is considered, a non-dissipative region is still inevitable in the low-frequency area, which leads to a risk of destabilization for weak grid operations. To tackle this challenge, a virtual damping control scheme is proposed in this paper, and the non-dissipative region in the d-axis and the q-axis can be reduced to a specific range, respectively. Moreover, the transient performance is also improved compared with the conventional virtual damping method. Finally, the effectiveness of the proposed method is verified through the simulations.
KW - Multi-sampling pulse width modulation
KW - dissipativity
KW - low-frequency stability
KW - virtual damping
UR - http://www.scopus.com/inward/record.url?scp=85144078583&partnerID=8YFLogxK
U2 - 10.1109/ECCE50734.2022.9948163
DO - 10.1109/ECCE50734.2022.9948163
M3 - Article in proceeding
SN - 978-1-7281-9388-5
T3 - IEEE Energy Conversion Congress and Exposition
BT - Proceedings of the 2022 IEEE Energy Conversion Congress and Exposition (ECCE)
PB - IEEE (Institute of Electrical and Electronics Engineers)
T2 - 2022 IEEE Energy Conversion Congress and Exposition, ECCE 2022
Y2 - 9 October 2022 through 13 October 2022
ER -