首页|Switched-capacitor Based Seven-level Boost Inverter with a Reduced Number of Devices

Switched-capacitor Based Seven-level Boost Inverter with a Reduced Number of Devices

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The conventional multilevel inverters(MLIs)have the disadvantages of numerous devices,incapacity of boost,unbalance for capacitor's voltage,high complexity for control,and etc.Motivated by this issue,a seven-level boost inverter(7LBI)based on a switched capacitor is presented for single-phase applications in this paper.The proposed 7LBI using only seven transistors can achieve seven output levels,1.5 voltage gain,and natural balance of capacitors'voltages without sensors or other auxiliary methods,which illustrates its suitability for the applications of renewable energy generation.The configuration of topology and operating principles are illustrated in detail.The natural balance of capacitors and capacitance calculations are deduced as well.Moreover,the comparative study is conducted for different types of MLIs.The results illustrate the merits of the proposed 7LBI with respect to reduced devices,lower voltage stress,and less power loss.Finally,a simulation for the proposed 7LBI with PWM modulation is realized based on the theoretical analysis;an experimental prototype is also implemented,verifying multilevel output,boost ability,natural balance for switched capacitors,and performance of transient response.

Multilevel invertersvoltage gainnatural balancerenewable energy generationreduced number of elements

Weijie Lin、Jun Zeng、Bo Fu、Zhixing Yan、Junfeng Liu

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School of Electric Power Engineering,South China University of Technology,Guangzhou 510641,China

WISDRI Engineering & Research Incorporation Limited,Wuhan 430074,China

Department of Energy,Aalborg University,Aalborg 9220,Denmark

School of Automation Science and Engineering,South China University of Technology,Guangzhou 510641,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaJoint Laboratory of Energy Saving and Intelligent Maintenance for Modern Transportations

6217314852377186

2024

10.17775/CSEEJPES.2020.02620

中国电机工程学会电力与能源系统学报(英文版)
中国电机工程学会

中国电机工程学会电力与能源系统学报(英文版)

CSTPCDEI
ISSN：2096-0042
年,卷(期)：2024.10(1)
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