DC-link Voltage Control of Hybrid Distribution Transformer Based on Extended State Observer

被引：0
|
作者：
Zhou K. [1 ,2 ,3 ]
Liu Y. [1 ,2 ,3 ]
Liang D. [1 ,2 ,3 ]
Cai S. [1 ,2 ,3 ]
Zhang L. [1 ,2 ,3 ]
Wu Z. [4 ]
机构：
[1] State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an
[2] Shaanxi Key Laboratory of Smart Grid, Xi'an Jiaotong University, Xi'an
[3] School of Electrical Engineering, Xi'an Jiaotong University, Xi'an
[4] Electric Power Research Institute of State Grid Shaanxi Electric Power Company, Xi'an
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2021年 / 45卷 / 16期
关键词：
DC-link voltage control; Extended state observer (ESO); Harmonic compensation; Hybrid distribution transformer (HDT); Power quality;
D O I：
10.7500/AEPS20201130008
中图分类号：
学科分类号：
摘要：
Hybrid distribution transformer (HDT) can effectively suppress the power grid harmonics and stabilize the load voltage, which is of great significance at the end of the distribution network. In the case of load change, power grid voltage fluctuation or three-phase unbalance, the functions of harmonic compensation and maintenance of load voltage stability have problems, which are caused by the bus voltage instability on the DC side of the hybrid distribution transformer. This paper proposes a DC-link voltage control strategy based on the extended state observer (ESO), in which the total observed disturbance is compensated by feedforward to improve the stability of the DC-link voltage. At the same time, the stability of the designed ESO and voltage controller is analyzed in the frequency domain. Finally, in the simulation based on MATLAB/Simulink and the experiment, compared with the proportional-integral (PI) control, the designed controller is proved to have a faster response speed and better stability. © 2021 Automation of Electric Power Systems Press.
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页码：200 / 207
页数：7
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