<span lang="HR">Solar photovoltaic (PV) system becomes popular to generate the electricity in Asian region and helps to reduce the burden to utility. The power converter plays crucial role to interconnect with DC- grid. Traditional type power DC-DC converter can able to extract the maximum power from solar PV. However, most of the applications, it often fails to meet the voltage level of the DC bus and additional converter is required to boosting p the DC voltage. In order to overcome this drawback, this paper proposes a novel DC-DC converter to extract the maximum power from solar PV and helps to enhance the voltage level to meet the DC-bus. The PV and IV characteristics of practical solar PV cell and mathematical modelling have been done and implemented the same to proposed high gain converter. The maximum power point tracking (MPPT) algorithm and operation details are addressed and the detailed operation waveform of proposed high voltage gain DC-DC converter with mathematical evident is reported in this paper. The simulation study was carried out in the PSCAD/EMDTC software. From the measured results, it is investigated in further to validate the MPPT operation, gain values achievement and performance analysis of proposed converter. The corresponding explanations and results are presented in this article.</span>

A Switched-Capacitor Interleaved Bidirectional DC-DC Converter is used to increase the voltage gain and to decrease the voltage gain to a renewable energy storage system is illustrated with an experimental setup using FGPA controller. This interleaved construction is accepted on this converter of the less-voltage side to decrease the content of the ripple which flows through the side which is low-voltage of this converter. This type of series-connection structure is accepted to achieve the more voltage gain on the higher voltage side/less voltage gain on the high-voltage side of this converter structure. Also, this type of structure is need in a bidirectional synchronic rectification performance are carried out without requiring any additional experimental setup for the same operation, and with this type of converter’s structure its performance is improved. Besides, with this structure, here we can analyze the converter’s current ripple characteristics and also, the operating principles of voltage, and current stresses. Finally; a power rating of kW experimental setup was constructed to analyze this converter’s performance for different ranges under various voltage gain ranges in between the voltage ranges of 50V to 120V on the low-voltage side of this converter while other voltage 400V is kept constant. Under this condition, this converters’ efficiency obtained maximum value is 95.21% in the increase mode whereas when the converter is operating in the decrease mode of operation, the efficiency obtained value is 95.30%. The investigational validation values are verified for boost increase mode and decrease mode of operation with the experimental setup. The same circuit is also performed with the Simulink and got verified for increase and decrease modes of performance.

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Background & Objective: In single-phase solar PV applications, the module voltage level is limited; therefore, a coupled step up transformer is mandatory portion to interconnect into the grid. However, due to presence of transformer, the overall cost and size of the single-phase grid tied solar PV system is higher. Multilevel inverter is an alternative solution to solve these issues, but it requires more number of switches. Methods: In order to overcome this drawback, this particular paper proposes a novel asymmetric multilevel inverter (AMLI) with reduced number of switches for solar PV grid-tied system. The operational details of the proposed converter are explained in this paper. In addition, the MPPT control has been implemented in the proposed novel AMLI and presented in this paper. The hysteresis current control mechanism is applied to the proposed converter and corresponding control blocks are reported in this paper. Results: Finally, to validate the proposed system, the simulation results are performed and correlated with theoretical approach Furthermore, to verify the feasibility of proposed converter for solar PV grid-tied system, the experimental setup was made and experimental results have been measured and presented in this paper. Conclusion: From the measured results, it is concluded that the proposed asymmetric MLI can be most promising converter for solar PV grid connected system.

Background: In renewable energy system applications, the power converter is essential for transferring energy into the load centre. The AC network voltage is much higher than the renewable energy source voltage; therefore, a transformer is commonly used to step up the voltage. However, the size and cost of the system are larger due to the presence of a bulky transformer, and also the efficiency is deteriorated due to PWM voltage being applied to the transformer. Objective: To eliminate the requirement of the transformer, DC link voltage is boosted up to a higher level using a high-gain converter. Various DC-DC converters have been proposed in recent studies; however, the involvement of the active switches is high to produce higher voltage gain, which reduces efficiency. In order to overcome this limitation, this particular paper proposes a novel switched hybrid-voltage doubler high gain DC-DC converter, which helps to achieve higher gain with a minimum number of components count compared to other reported converters. It also reduces the device's stress, thereby increasing its efficiency. Method: This paper describes the detailed operational studies along with CCM and DCM modes. The mathematical analysis under each operating state is reported in this paper. A detailed comparative study on the performance merits of the proposed converter, along with other recently reported converters, is presented. Results: Finally, the simulation results are presented to validate the operation of the proposed converter. Furthermore, a 500 W laboratory setup is developed to verify the operation details and practical feasibility of the converter through experimental results and presented in this paper. Conclusion: From the measured results, it is concluded that the proposed converter can play the most promising role in the transmission phase in renewable energy system implementations since it boosts the voltage to the adequate point as required by the system.