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B. Chandra Sekhar ¹, Sanjay Lakshminarayanan ²

Affiliations
1 Energy Efficiency and Renewable Energy Division, Central Power Research Institute, Bangalore- 560080, IN
2 Associate Professor, EEE Department, MS Ramaiah University of Applied Sciences (MSRUAS), Bangalore-560054, IN

Abstract

In this study, an integrated double input DC to DC buck-buck boost converter for high/low voltage energy source applications is presented. An integrated buck-buck boost converter which can step down or step up the input voltage according to output voltage required at the load end. A multi input converter can be used instead of single input converters to integrate different energy sources such as solar PV, wind energy system, fuel cell and diesel etc. The converter is designed considering double input, in which same or different type of two inputs can be used individually or simultaneously. The operation modes and the steady state analysis of the converter are delinated. Finally converter behavior observed by using Matlab/SimulinkTM enviornment for closed loop simulation with PI control scheme, the obatinaed results are presented in detailed manner

Keywords

Multi Input DC-DC converters (MICs), hybrid energy system, closed loop control

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Chandrasekhar B. ¹, Sanjay Lakshminarayanan ², Sudhir Kumar R. ¹

Affiliations
1 Energy Efficiency and Renewable Enenrgy Division, Central Power Research Institute, Bengaluru - 560080, IN
2 Associate Professor, EEE, MS Ramaiah Institute of Technology, Bengaluru - 560054, IN

Abstract

Single input DC-DC converters can be successfully replaced by a single, multiple input DC-DC converter. The structure of Multiple-Input Converter (MIC) is simpler compared to the use of several single input converters for each source. Using input renewable energy sources like photovoltaic (PV) source, wind source and fuel cell, etc, MIC can deliver power either simultaneously from all of the input sources to the load or individually. MICs reduce the system size and cost by reducing the number of components. This paper presents integrated Buck, Boost, Buck-Boost multi input DC-DC converters circuit configurations, theoretical aspects, their operational principles, merits and demerits.

Keywords

Multi Input DC-DC Converter (MIC), Integrated Buck, Boost, Buck-boost Converters.

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B. Chandrasekhar ¹, Sanjay Lakshminarayanan ², R. Sudhir Kumar ¹

Affiliations
1 Energy Efficiency and Renewable Energy Division, Central Power Research Institute, Bangalore- 560080, IN
2 Associate Professor, EEE Department,MS Ramaiaha Institute of Technology, Bangalore-560054, IN

Abstract

Integration of more than one energy source depends on the power electronic converters is an interesting and challenging task for researchers. In this paper, integrated double input DC to DC converter for low voltage energy source applications is explained. Integrated buck converter which can step down the input voltage according to output voltage required at the load end. The converter is able to integrate different voltages of various energy sources such as solar photovoltaic, wind energy system, fuel cell and diesel etc. of relatively low voltage. The converter is designed considering double input, in which same or different type of two inputs can be used individually or simultaneously. Modes of operation of converter are described in detail, closed loop simulation with a PI controller using MATLAB/Simulink^TM results are presented in detail.

Keywords

Double input DC-DC converter, hybrid energy system, closed loop control.

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B. Chandrasekhar ¹, Sanjay Lakshminarayanan ², S. Sudhakara Reddy ³

Affiliations
1 Senior Research Fellow, Energy Efficiency & Renewable Energy Division, Central Power research Institute, Bangalore - 560 080, IN
2 Associate Professor, Electrical & Electronics Engineering, MS Ramaiah Institute of Technology, Bangalore - 560054, IN
3 Joint Director, Energy Efficiency & Renewable Energy Division, Central Power Research Institute, Bangalore - 560080, IN

Abstract

Renewable energy sources (RES) are being increasingly connected in distribution systems utilizing power electronic converters. This paper presents an advanced control strategy for achieving maximum power quality benefits from the grid interfacing inverters when installed in 3-phase distribution systems. The grid tie inverter can be utilized as i) Power converter to inject power generated from RES to the grid and ii) shunt active power filters to compensate current imbalance, load current harmonics, reactive power demand and load neutral current. All of these functions may be accomplished either individually or simultaneously. This control concept is clearly explained with MATLAB/SIMULINK simulation results and THD is less than 5%.

Keywords

Renewable energy sources, grid tied inverter, active power filter, power quality

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