Dynamic Model and Inner Loop Control System of Hybrid Distribution Transformer

被引：0
|
作者：
Liu Y. [1 ,2 ]
Liang D. [1 ,2 ]
Wang Y. [1 ,2 ]
Gao Y. [1 ,2 ]
Zhang L. [1 ,2 ]
机构：
[1] State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an
[2] Shaanxi Key Laboratory of Smart Grid, Xi'an
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2021年 / 36卷 / 07期
关键词：
Active distribution network; Equivalent circuit; Hybrid distribution transformer; PI controller; Transfer function;
D O I：
10.19595/j.cnki.1000-6753.tces.L90170
中图分类号：
学科分类号：
摘要：
Comparing with the traditional distribution transformer, hybrid distribution transformer (HDT) can regulate the partial load power by the integrated PWM converters. Therefore, HDT can not only change the voltage rate and transfer the load power just as the traditional transformer, but also can control the grid current and load voltage in real time. Hence, HDT is a promising equipment for the intelligence of the active distribution network. In this paper, an improved HDT configuration and the three-phase circuit scheme of HDT is presented. In this scheme, the converter with sample topology can be applied and the rated voltages of all the units can be easily determined. Based on the equivalent circuit of the present HDT, the transfer function model is established, then the PI controller is adopted to construct the inner control system of HDT. Both the simulation and experiment are performed in the condition of nonlinear load and fluctuated grid voltage. The results shows that the grid side current can be regulated to be sinusoidal, symmetrical and unit power factor, the load voltage can be controlled to be stable. Which verifies the correctness of the established dynamic model and the presented control strategy. © 2021, Electrical Technology Press Co. Ltd. All right reserved.
引用
收藏
页码：1537 / 1546
页数：9
相关论文
共 19 条
  • [11] Kaniewski J., Hybrid distribution transformer based on a bipolar direct AC/AC converter, IET Electric Power Applications, 12, 7, pp. 1034-1039, (2018)
  • [12] Kaniewski J, Szczesniak P, Jarnut M, Et al., Hybrid voltage sag/swell compensators: a review of hybrid AC/AC converters, IEEE Industrial Electronics Magazine, 9, 4, pp. 37-48, (2015)
  • [13] Kaniewski J, Fedyczak Z, Benysek G., AC voltage sag/swell compensator based on three-phase hybrid transformer with buck-boost matrix-reactance chopper, IEEE Transactions on Industrial Electronics, 61, 8, pp. 3835-3846, (2014)
  • [14] Bala S, Das D, Aeloiza E, Et al., Hybrid distribution transformer: concept development and field demonstration, 2012 IEEE Energy Conversion Congress and Exposition (ECCE), pp. 4061-4068, (2012)
  • [15] Burkard J, Biela J., Protection of hybrid transformers in the distribution grid, 2016 18th European Conference on Power Electronics and Applications, pp. 1-10, (2016)
  • [16] Liang Deliang, Liu Yibin, Kou Peng, Et al., Analysis of development trend for intelligent distribution transformer, Automation of Electric Power Systems, 44, 7, pp. 1-18, (2020)
  • [17] Radi M A, Darwish M., Var control considerations for the design of hybrid distribution transformers, 11th IET International Conference on AC and DC Power Transmission, pp. 1-9, (2015)
  • [18] Radi M A, Darwish M, Alqarni M., Voltage regulation considerations for the design of hybrid distribution transformers, 2014 49th International Universities Power Engineering Conference (UPEC), pp. 1-6, (2014)
  • [19] Liu Yibin, Liang Deliang, Liang Yang, Et al., Design and analysis of the compounded control system of hybrid distribution transformer, 2018 IEEE Energy Conversion Congress and Exposition (ECCE), pp. 3664-3668, (2018)
12