Direct Frequency Control Based MPPT Algorithm of LLC Resonant Converter for Photovoltaic System

2019 ◽  
Author(s):  
Yizhan Zhuang ◽  
Fei Liu ◽  
Xiangjing Zhang ◽  
Xiaoguang Diao ◽  
Jianbo Jiang ◽  
...  
Keyword(s):  
Frequency Control ◽  
Photovoltaic System ◽  
Resonant Converter ◽  
Llc Resonant Converter

Design and Implementation of LLC Resonant Converter for Photovoltaic Battery Charging Application

2015 ◽  
Vol 785 ◽  
pp. 101-105
Author(s):  
Adrian Soon Theam Tan ◽  
Shahid Iqbal
Keyword(s):  
High Efficiency ◽  
Input Voltage ◽  
Voltage Regulation ◽  
Photovoltaic System ◽  
Resonant Converter ◽  
Battery Charging ◽  
Zero Voltage Switching ◽  
Design And Implementation ◽  
Switching Losses ◽  
Llc Resonant Converter

Photovoltaic power conditioning system (PVPCS) requires a high efficiency dc-dc converterstage capable of wide input voltage regulation and have the ease of maximum power point implementation for both stand alone photovoltaic system and grid-connected system. Galvanic isolation at the dc-dc stage can replace the isolation needed in the inverter stage and thus reduce the sizeof isolation transformer and increases overall system efficiency. This paper presents detailed analysis,design and implementation of a LLC resonant converter for photovoltaic battery charging application.The LLC resonant converter operate with zero voltage switching (ZVS) turn on and low current turnoff thus reducing switching losses. The experimental results are given to validate the operation andperformance of the converter.

scholarly journals LLCLC Resonant Converter Based Pseudo DC Link Inverter

2021 ◽  
Vol 12 (1) ◽  
pp. 42
Author(s):  
Arslan Arif ◽  
Junaid Arshad ◽  
Shahid Iqbal
Keyword(s):  
Power Systems ◽  
High Efficiency ◽  
Frequency Control ◽  
Resonant Circuit ◽  
Resonant Converter ◽  
In Series ◽  
Llc Resonant Converter ◽  
Power Inverters ◽  
Variable Frequency Control ◽  
Circuit Impedance

Technological advancements in solar power systems necessitate highly reliable power inverters with a high efficiency and a small size. An LLC resonant converter-based pseudo Direct Current (DC) link inverters offer these qualities to some extent. The resonant circuits of conventional pseudo DC link inverters lack the ability to attain a zero gain and cannot handle variable frequency control which in turn requires very large filters to produce pure sinusoidal output voltages for grid. The usage of these filters consequences in the enhanced price and size of inverters; moreover, the reliability of inverters is also reduced. We propose a novel topology for a pseudo DC link inverter based on an LLCLC resonant converter. The proposed inverter does not require large filters, because it generates rectified sinusoidal output voltages. An additional parallel LC component is added in series to the resonant circuit, which makes it able to attain a zero gain through an infinite circuit impedance. The 400 W pseudo DC link inverter with a 40 V input and a 400 V output is designed and simulated on OrCAD PSpice software. The results showed that there is a significant improvement in achieving a zero gain. The possible lowest gain achieved is approximately 0.125. The proposed technique attested to be more efficient than those formerly used, subsequently contributing satisfying outcomes.

Bi‐frequency control for LLC resonant converter with fast transient response

2016 ◽  
Vol 52 (20) ◽  
pp. 1710-1712
Author(s):  
Shu Zhong ◽  
Jianping Xu ◽  
Sheng Zhao ◽  
Xiang Zhou
Keyword(s):  
Transient Response ◽  
Frequency Control ◽  
Resonant Converter ◽  
Fast Transient Response ◽  
Llc Resonant Converter ◽  
Fast Transient
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