Multi-objective optimal control method for T-type three-level inverter based on model predictive

被引：0
|
作者：
Zhu H. [1 ]
Zhang X. [1 ]
Li M. [1 ]
Liu X. [1 ]
机构：
[1] School of Electrical Engineering and Automation, Hefei University of Technology, Hefei
来源：
Zhu, Hong (zhhfut@163.com) | 1600年 / Science Press卷 / 42期
关键词：
Model predictive control; Multi-objective optimization; Neutral-point voltage balancing; T-type three-level; Voltage control;
D O I：
10.19912/j.0254-0096.tynxb.2019-0903
中图分类号：
学科分类号：
摘要：
In this paper, the main circuit mathematical model of T-type three-level inverters is established, and a model predictive multi-objective optimal control method for T-type three-level inverters is studied, which mainly includes output voltage control and neutral-point potential balance control. Firstly, the load voltage and current are sampled, and the output voltage prediction value is calculated by the sampled value. In order to minimize the error between the predicted voltage and the reference voltage, and to measure the neutral point current of the DC bus, the deviation value of the neutral point potential can be obtained. According to the charging and discharging situation of the DC side capacitor corresponding to the switch state, the switching state that reduces the deviation value of the neutral point potential can be optimized and selected, which will be used in the next sampling period. Finally, the method is verified by Matlab/Simulink simulation and experiment. The simulation and experiment results show that the method can realize output voltage control and neutral point potential balance control well, and has the characteristics of simple principle and easy digital implementation. © 2021, Solar Energy Periodical Office Co., Ltd. All right reserved.
引用
收藏
页码：90 / 96
页数：6
相关论文
共 20 条
  • [1] NABAE A, TAKAHASHI I, AKAGI H., A new neutral point clamped PWM inverter, IEEE transactions on industry applications, 17, 5, pp. 518-523, (1981)
  • [2] TEODORESCU R, MA L, SUN K, TEODORESCU R, Et al., Comparison of the topologies of high efficiency neutral point clamping photovoltaic inverters, Transactions of China Electrotechnical Society, 26, 2, pp. 108-114, (2011)
  • [3] WANG L Q, JIANG X D., A Single-phase space vector PWM method for multilevel inverter and its application, Transactions of China Electrotechnical Society, 26, 4, pp. 114-121, (2011)
  • [4] LI N, WANG Y, JIANG Y W, Et al., A novel neutral point voltage control strategy of three-level NPC converter, Journal of power supply, 12, 1, pp. 8-14, (2014)
  • [5] LI P, LIU G Z., Research on SVPWM control scheme for NPC three-level inverter and balance of neural-point voltage, China measurement & test, 38, 5, pp. 75-79, (2012)
  • [6] YANG C, LIU Y., The contrast of conduction dissipation of T-type3-level inverter and diode-clamped 3-level inverter, Modern machinery, 2, pp. 61-66, (2015)
  • [7] YU R R, WEI X Y, WU X J, Et al., An improved predictive current control algorithm, Transactions of China Electrotechnical Society, 25, 7, pp. 100-107, (2010)
  • [8] XIE L Y, JIN X M, WU X Z, Et al., Neutral point volt-age feedback control based on zero sequence injection for NPC three-level converter, Transactions of China Electrotechnical Society, 27, 12, pp. 117-128, (2012)
  • [9] ZHU T T, DENG Z Q, WANG X L, Et al., A novel strategy of neutral point potential balancing for three-level three-phase four-leg inverters, Transactions of China Electrotechnical Society, 27, 6, pp. 77-82, (2012)
  • [10] DONG W G, LIANG J P., Design and improved of diode neutral point clamped three-level converter, Journal of power supply, 12, 2, pp. 56-61, (2014)
12