Abstract
In this article a new Transformer and Switched Capacitor-based Boost Converter (T & SC-BC) is proposed for high-voltage/low-current renewable energy applications. The proposed T & SC-BC is an original extension for DC-DC boost converter which is designed by utilizing a transformer and switched capacitor (T & SC). Photovoltaic (PV) energy is a fast emergent segment among the renewable energy systems. The proposed T & SC-BC combines the features of the conventional boost converter and T & SC to achieve a high voltage conversion ratio. A Maximum Power Point Tracking (MPPT) controller is compulsory and necessary in a PV system to extract maximum power. Thus, a photovoltaic MPPT control mechanism also articulated for the proposed T & SC-BC. The voltage conversion ratio (Vo/Vin) of proposed converter is (1 + k)/(1 − D) where, k is the turns ratio of the transformer and D is the duty cycle (thus, the converter provides 9.26, 13.88, 50/3 voltage conversion ratios at 78.4 duty cycle with k = 1, 2, 2.6, respectively). The conspicuous features of proposed T & SC-BC are: (i) a high voltage conversion ratio (Vo/Vin); (ii) continuous input current (Iin); (iii) single switch topology; (iv) single input source; (v) low drain to source voltage (VDS) rating of control switch; (vi) a single inductor and a single untapped transformer are used. Moreover, the proposed T & SC-BC topology was compared with recently addressed DC-DC converters in terms of number of components, cost, voltage conversion ratio, ripples, efficiency and power range. Simulation and experimental results are provided which validate the functionality, design and concept of the proposed approach.
Highlights
In recent years the importance of using renewable energies has grown significantly due to the recent years the importance of using renewable energies has grown significantly due to the fact fact In that the usage of fossil fuels such as oil, coal, and gas results in environmental pollution and that the greenhouse usage of fossil fuelswhich such as oil, acoal, and gas results in environmental serious effects have huge influence on the world [1,2]
The proposed T & SC-BC is an original extension for DC-DC boost converters which is based on T & SC
Where Iph is the photocurrent generated by the cell, Id is the current flowing through the diode of the solar cell, ISh is the shunt current flowing through the shunt resistance (RSh ), I is the output current or current flowing through the series resistance (RS ), V is the voltage at the output terminal of the cell, Io is the reverse saturation current, n is the diode ideal factor, VT is the thermal voltage, k is the Boltzmann constant and T is the absolute temperature
Summary
In recent years the importance of using renewable energies has grown significantly due to the recent years the importance of using renewable energies has grown significantly due to the fact fact In that the usage of fossil fuels such as oil, coal, and gas results in environmental pollution and that the greenhouse usage of fossil fuelswhich such as oil, acoal, and gas results in environmental serious effects have huge influence on the world [1,2]. The International population and increased living standards of society [3,4,5,6,7,8,9].nations. Photovoltaic energy is considered a reliable, promising favorable energy considered as a reliable, promising favorable source andlong it has various advantages such source is and it has various advantages such and as being pollution free, life, low maintenance, etc. To increase the effectiveness energy systems [19]. Point conditioning (MPP) plays an role in increasing the conversion efficiency
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