Offset-Free Optimal Control of Cascaded H-Bridge Converters Based on a Kalman Filter Harmonic Compensator

被引:0
作者
Poblete, Pablo [1 ,2 ]
Aguilera, Ricardo P. [2 ]
Pereda, Javier [3 ,4 ]
Cuzmar, Rodrigo H. [1 ,2 ]
Alcaide, Abraham M. [5 ]
Lu, Dylan Dah-Chuan [2 ]
Siwakoti, Yam Prasad [2 ]
Acuna, Pablo [6 ]
机构
[1] Pontificia Univ Catolica Chile, Dept Elect Engn, Santiago 7820436, Chile
[2] Univ Technol Sydney, Sch Elect & Data Engn, Broadway, NSW 2007, Australia
[3] Pontificia Univ Catolica Chile, Dept Elect Engn, Santiago 7820436, Chile
[4] Pontificia Univ Catolica Chile, UC Energy Res Ctr, Santiago 7820436, Chile
[5] Univ Seville, Elect Dept, Seville 41092, Spain
[6] Univ Talca, Dept Elect Engn, Curico 3340000, Chile
基金
芬兰科学院; 澳大利亚研究理事会;
关键词
Voltage control; Optimal control; Power harmonic filters; Harmonic analysis; Steady-state; Predictive models; Capacitors; Voltage measurement; Pulse width modulation; State-space methods; Cascaded H-Bridge (CHB); Kalman filtering; predictive control; MODEL-PREDICTIVE CONTROL; MULTILEVEL CONVERTER; FCS-MPC;
D O I
10.1109/TPEL.2024.3472451
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Cascaded H-bridge (CHB) converters are suitable candidates for numerous applications, including electrical drives, static synchronous compensators, and battery energy storage inverters. Optimal control strategies for CHB converters have attracted significant interest in recent decades due to their flexibility in including multiple control objectives and their simple design process. However, the steady-state performance of these control strategies deteriorates if the CHB converter model has parameter mismatches and/or the submodule (SM) capacitor voltage ripples are not measured. This work proposes a Kalman filter (KF) based strategy to eliminate the steady-state error and undesired low-frequency harmonic components in the CHB converter output currents. The proposed KF strategy estimates the instantaneous arm voltage harmonics representing the converter modeling errors and unaccounted disturbances. Then, these estimated voltage harmonics are used to improve the arm current predictions and obtain a compensation term for the steady-state arm voltage references to be used by the optimal control strategy. Experimental results for three different optimal control schemes are provided for a three-phase CHB converter with nine SMs to confirm the effectiveness of the proposed KF strategy.
引用
收藏
页码:625 / 637
页数:13
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