微电网
占空比
正激变换器
Ćuk转换器
脉冲频率调制
降压式变换器
调制(音乐)
降压升压变换器
反激变换器
光伏系统
整流器(神经网络)
电压
脉冲宽度调制
电气工程
升压变换器
电子工程
工程类
计算机科学
物理
脉冲幅度调制
脉搏(音乐)
机器学习
循环神经网络
随机神经网络
人工神经网络
声学
作者
Xiaonan Zhao,Cheng-Wei Chen,Jih‐Sheng Lai
出处
期刊:IEEE Transactions on Power Electronics
[Institute of Electrical and Electronics Engineers]
日期:2019-08-01
卷期号:34 (8): 7462-7473
被引量:32
标识
DOI:10.1109/tpel.2018.2878225
摘要
In this paper, a highly efficient isolated resonant converter with a novel modulation method is proposed for delivering power from photovoltaic (PV) modules to the dc microgrid. The proposed modulation method allows the converter to boost low input voltages and regulate a wide input voltage range. The converter design is based on a series resonant converter (SRC) that operates at the resonant frequency to achieve highest efficiency under nominal input voltage condition. Under shadowed or low irradiance conditions of PV panels, the converter will operate with the proposed “double-pulse duty cycle” modulation method to step up the voltage for the dc microgrid connection. With the proposed modulation method, the output switches serve for both synchronous rectification and voltage boost function. This method enables a higher voltage boost ratio than the SRC without adding additional switches while operating at the resonant frequency. A 300-W hardware prototype with gallium-nitride devices is built to verify the performance of the proposed converter and modulation method. The converter achieved a peak efficiency of 98.9% and a California Energy Commission weighted efficiency of 98.7% under nominal input voltage condition.
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