Combined switching state of model predictive control for unbalance regulation strategy for three-level NPC inverter

被引：0
|
作者：
Li Y. [1 ]
Pan C. [1 ]
Cao H. [2 ]
Jin N. [1 ]
Wang J. [3 ]
机构：
[1] College of Electric and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou
[2] Henan Senyuan Electric Co., Ltd., Zhengzhou
[3] Sanmenxia Power Supply Company, State Grid Henan Electric Power Company, Sanmenxia
来源：
Li, Yanyan (582074055@qq.com) | 1600年 / Power System Protection and Control Press卷 / 48期
基金：
中国国家自然科学基金;
关键词：
Model predictive control; Three-level neutral point clamped inverter; Three-phase four-wire; Three-phase unbalance;
D O I：
10.19783/j.cnki.pspc.190997
中图分类号：
O1 [数学];
学科分类号：
0701 ; 070101 ;
摘要：
Neutral point voltage balance of a three-level compensator produces insufficient compensation of zero-sequence current in a three-phase four-wire grid. This will affect the effectiveness of unbalance control. To solve this problem, this paper proposes a combined switching state control strategy after researching the relationship between zero-sequence current and neutral point voltage with regard to different kinds of voltage vectors. According to the ability to compensate zero-sequence current of all switching states, a combined scheme of 13 switching states composed of zero vector, short vector and middle vector is selected to practice model predictive control. The zero-sequence current compensation ability of different combination switching states under the neutral point voltage balance is compared by simulation, and the switching state proposed in this paper is adopted to control the unbalance. The results verify the effectiveness and accuracy of the combined switching state theory and control algorithm. © 2020, Power System Protection and Control Press. All right reserved.
引用
收藏
页码：97 / 106
页数：9
相关论文
共 24 条
  • [1] GUO Zhaocheng, CHE Jiantao, GUO Qidong, Et al., Three-phase unbalanced load adjustment based on power and power consumption information of low-voltage distribution network, Power System Protection and Control, 46, 21, pp. 86-95, (2018)
  • [2] MOHD A, ORTJOHANN E, HAMSIC N, Et al., Control strategy and space vector modulation for three-leg four-wire voltage source inverters under unbalanced load conditions, IET Power Electronics, 3, 3, pp. 323-333, (2010)
  • [3] VECHIU L, CUREA O, CAMBLONG H., Transient operation of a four-leg inverter for autonomous applications with unbalanced load, IEEE Transactions on Power Electronics, 25, 2, pp. 399-407, (2010)
  • [4] VECHIU L, CAMBLONG H, TAPIA G, Et al., Control of four leg inverter for hybrid power system applications with unbalanced load, Energy Conversion and Management, 48, 7, pp. 2119-2128, (2007)
  • [5] MISHRA M K, GHOSH A, JOSHI A, Et al., A novel method of load compensation under unbalanced and distorted voltages, IEEE Transactions on Power Delivery, 22, 1, pp. 288-294, (2007)
  • [6] ZHANG Z, LIU Y, GUAN H., Unbalance loads compensation with STATCOM based on PR controller and notch filter, 2018 10th International Conference on Modelling, Identification and Control (ICMIC), pp. 1-6, (2018)
  • [7] LU W, WANG R, XU W, Et al., A novel three phase unbalance detection and compensation method of active power filter, 2018 Chinese Automation Congress (CAC), pp. 418-422, (2018)
  • [8] WANG P, CAO W, LIU K, Et al., An unbalanced component detection method and compensation strategy based on second-order generalized integrator (SOGI), 2019 IEEE Power and Energy Conference at Illinois (PECI), pp. 1-6, (2019)
  • [9] ZHAO Li, WEI Yingdong, JIANG Qirong, Et al., Unbalance compensation strategy of three-phase four-wire DSTATCOM based on capacity limitation, Advanced Technology of Electrical Engineering and Energy, 38, 6, pp. 8-15, (2019)
  • [10] ZHANG Guorong, ZHOU Tonglu, LI Xun, Quasi-PR controlled three-level inverter and neutral-point balance strategy, Electrical Measurement & Instrumentation, 53, 5, pp. 1-6, (2016)
123