Single-phase five-level current source inverter based on switched-inductor

被引：0
|
作者：
Wu X. [1 ]
Yang A. [1 ]
Wang J. [2 ]
Liu J. [1 ]
Qi J. [1 ]
机构：
[1] National Active Distribution Network Technology Research Center, Beijing Jiaotong University, Beijing
[2] Shenzhen Power Supply Bureau Co.，Ltd., Shenzhen
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2023年 / 43卷 / 02期
关键词：
double frequency fluctuation; multi-level; power feedforward control; single-phase current source inverter; switched-inductor;
D O I：
10.16081/j.epae.202205064
中图分类号：
学科分类号：
摘要：
Multi-level current source inverter has attracted extensive attention because of its high security and low output harmonic. A single-phase five-level current source inverter based on switched-inductor is proposed. The DC control unit adopts Buck structure，which provides an independent charging and discharging circuit for the inductor，realizes the complete decoupling of inductor current control and output current control，and controls the current stability by using a small inductor. The proposed inverter adopts the structure of switched-inductor，which reduces the number of devices，and its high symmetry can simplify the design of peripheral circuits. Aiming at the problem of double frequency fluctuation of inductor current at the input side of single-phase inverter，the power feedforward control is increased based on the traditional proportional integral control. Taking the constant current of the energy storage inductor in each switching cycle as the prerequisite，the duty cycle disturbance of the DC side switching devices under different states is converted. Without increasing the complexity of the circuit，less devices and small energy storage inductors are used to effectively suppress the double frequency fluctuation of the inductive current，reduce the third harmonic content and total harmonic distortion of the output current，and improve the output power quality. Finally，the feasibility of the proposed topology and control strategy is verified by simulation and experiment. © 2023 Electric Power Automation Equipment Press. All rights reserved.
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页码：82 / 89
页数：7
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