A Switched quasi Z-Source Three-Port (SqZSTP) DC-DC converter for photovoltaic power generation system

2021 ◽  
Author(s):  
Dhinesh V ◽  
G. Vijayakumar
Keyword(s):  
Power Generation ◽  
Fuzzy Logic Controller ◽  
Dynamic Performance ◽  
Input Voltage ◽  
Generation System ◽  
Voltage Range ◽  
Distributed Power Generation ◽  
Pv Inverter ◽  
High Voltage Gain ◽  
Power Generation System

Abstract In this paper, a modified wide input Switched quasi Z-Source Three-Port (SqZSTP) DC-DC converter is proposed to interface the Photovoltaic (PV) inverter with the distributed power generation system. The proposed SqZSTP DC-DC converter constructed with the Quasi Z-Source impedance network and a three-winding High Frequency Transformer (HFT) offers high voltage gain with a wide input voltage range. In the proposed topology the input port has been divided into two ports, to reduce the power rating and voltage stress across each component. The design and operating principle of the SqZSTP DC-DC converter are presented. The steady state and dynamic performance of the proposed SqZSTP DC-DC converter is compared with other converters which has the impedance network in front. The Fuzzy Logic Controller (FLC) used in the voltage loop avoids the variation in the output voltage when the wide variation in the input voltage happens. In order to test the proposed topology, a scaled down model with the voltage and power rating of 400V/1400W was developed. The conversion efficiency of 94.5% is achieved.

The Research and First Application on Grid-Connected Photovoltaic System in Substation of AnHui

2011 ◽  
Vol 347-353 ◽  
pp. 1785-1790
Author(s):  
Hong Fu Xie ◽  
Ji Zhang ◽  
Ling Yi Zhang ◽  
Yu Wang
Keyword(s):  
Power Generation ◽  
Alternative Energy ◽  
Anhui Province ◽  
Photovoltaic System ◽  
Generation System ◽  
Distributed Power ◽  
Distributed Power Generation ◽  
Actual Application ◽  
Photovoltaic Power ◽  
Power Generation System

The distributed power generation is an energy development way which can most manifest the multiple advantages such as the energy saving, emission reduction, safety and flexible trait. As a kind of distributed power generation technology of renewable energy, photovoltaic power generation has already transited from supplement energy to alternative energy. Although solar photovoltaic power generation industry develops very quickly in China, actual application cases of substation photovoltaic grid-connected power generation system are few. In this paper, the research of photovoltaic grid-connected power generation system is used in Zhuishan substation in Bengbu Anhui province. The system is the first set of substation photovoltaic-connected grid power generation system in Anhui province. It has being operated for three years safety and steady. The whole application of the system is advanced and groundbreaking in the domestic.

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