有限集模型预测控制应用于大功率并网逆变器能在控制并网电流的同时降低开关频率,然而随着开关频率的降低,并网电流的谐波显著变大。针对这一问题,提出一种带有新型谐波抑制策略的改进型有限集模型预测控制方法,谐波抑制这一目标被添加到有限集模型预测控制的多目标优化过程中,谐波抑制策略是基于三角函数正交性对谐波幅值进行提取来实现的。所提出的方法在与传统方法同样低的开关频率下,降低了并网电流谐波,从而提升了并网电流的质量。最后,通过实验对比验证了所提出方法的有效性。
Abstract
Finite set model predictive control applied to high-power grid-connected inverters can reduce the switching frequency while controlling the grid-connected current. However, as the switching frequency decreases, the harmonics of the grid-connected current become significantly larger. Aiming at this problem, an improved finite set model predictive control method with a new harmonic suppression strategy is proposed. The objective of harmonic suppression is added to the multi-objective optimization process of finite set model predictive control. The suppression strategy is realized by extracting the harmonic amplitude based on the orthogonality of the trigonometric function. The proposed method reduces the harmonic content of the grid-connected current at the same low switching frequency some as the traditional method, thereby improving the quality of the grid-connected current. Finally, the effectiveness of the proposed method is verified by experiment.
关键词
并网逆变器 /
预测控制 /
谐波 /
三电平
Key words
grid-connected inverter /
predictive control /
harmonic /
three-level
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参考文献
[1] RODRIGUEZ J, BERNE S, WU B, et al. Multilevel voltage source-converter topologies for industrial medium voltage drives[J]. IEEE transactions on industrial electronics, 2007, 54(6): 2930-2945.
[2] RODRIGUEZ J, LAI J S, PENG F Z.Multilevel inverters: A survey of topologies, controls, and applications[J]. IEEE transactions on industrial electronics, 2002, 49(4): 724-738.
[3] 席裕庚, 李德伟, 林姝.模型预测控制——现状与挑战[J]. 自动化学报, 2013, 39(3): 222-236.
XI Y G, LI D W, LIN S.Model predictive control—status and challenges[J]. Acta automatica sinica, 2013, 39(3): 222-236.
[4] 柳志飞, 杜贵平, 杜发达.有限集模型预测控制在电力电子系统中的研究现状和发展趋势[J]. 电工技术学报, 2017, 32(22): 58-69.
LIU Z F, DU G P, DU F D.Research status and development trend of finite control set model predictive control in power electronics[J]. Transactions of China Electrotechnical Society, 2017, 32(22): 58-69.
[5] PREINDL M, SCHALTZ E.Sensorless model predictive direct current control using novel second order PLL observer for PMSM drive systems[J]. IEEE transactions on industrial electronics, 2011, 58(9): 4087-4095.
[6] BOUAFIA A, GAUBERT J P, KRIM F.Predictive direct power control of three-phase pulse width modulation (pwm) rectifier using space-vector modulation (SVM)[J]. IEEE transactions on power electronics, 2010, 25(1): 228-236.
[7] RODRIGUEZ J, PONTT J, SILVA C, et al. Predictive control of three-phase inverter[J]. Electronics letters, 2004, 40(9): 561-562.
[8] KOURO S, CORTES P, VARGAS R, et al. Model predictive control—A simple and powerful method to control power converters[J]. IEEE transactions on industrial electronics, 2009, 56(6): 1826-1838.
[9] XIE W, WANG X C, WANG F X, et al. Finite-control-set model predictive torque control with a deadbeat solution for PMSM drives[J]. IEEE transactions on industrial electronics, 2015, 62(9): 5402-5410.
[10] SONG W S, MA J P, ZHOU L.Deadbeat predictive power control of single-phase three-level neutral-point-clamped converters using space-vector modulation for electric railway traction[J]. IEEE transactions on power electronics, 2016, 31(1): 721-732.
[11] TARISCIOTTI L, ZANCHETTA P, WATSON A, et al. Modulated model predictive control for a three-phase active rectifier[J]. IEEE transactions on industry applications, 2015, 51(2): 1610-1620.
[12] DONOSO F, MORA A, CARDENAS R, et al. Finite-set model-predictive control strategies for a 3L-NPC inverter operating with fixed switching frequency[J]. IEEE transactions on industrial electronics, 2018, 65(5): 3954-3965.
[13] IEEE Std 929-2000: IEEE recommended practice for utility interface of photovoltaic (PV) system[S].
[14] IEEE Std 519-1992: IEEE Recommended practices and requirements for harmonic control in electric power system[S].
[15] KUZNIETSOV A, WOLF S, HAPPEK T.Model predictive control of a voltage source inverter with compensation of deadtime effects[C]//Proceedings of IEEE International Conference on Industrial Technology (ICIT), Seville, Spain, 2015: 2532-2536.
[16] FISHER C, MARIETHOZ S, MORARI.A model predictive control approach to reducing low order harmonics in grid inverters with LCL filters[C]//Industrial Electronics Society(IECON 2013), 39th Annual Conference of the IEEE, Vienna, Austria, 2013.
[17] AGUILERA R P.Selective harmonic elimination model predictive control for multilevel power converters[J]. IEEE transactions on power electronics, 32(3): 2416-2426.
[18] AGUILERA R P.Closed-loop SHE-PWM technique for power converters through model predictive control[C]//IECON 2015 - 41st Annual Conference of the IEEE Industrial Electronics Society, Yokohama, Japan, 2015: 005261-005266.
[19] 张兴, 王志捷, 刘芳, 等. 基于SHEPWM与MPC混合控制的三电平逆变器研究[J]. 太阳能学报, 2019, 40(11): 3078-3085.
ZHANG X, WANG Z J, LIU F, et al. Hybrid control method for three level inverter based on SHEPWM and MPC[J]. Acta energiae solaris sinica, 2019, 40(11): 3078-3085.
[20] RODRIGUEZ J.State of the art of finite control set model predictive control in power electronics[J]. IEEE transactions on industrial informatics, 2013, 9(2): 1003-1016.
[21] ZHANG X, WANG Y J, YU C Z, et al. Hysteresis model predictive control for high-power grid-connected inverters with output LCL-filter[J]. IEEE transactions on industrial electronics, 2016, 63(1): 246-256.
基金
国家自然科学基金重点项目（51677049）
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