Conference Papers
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Item Interleaved High Gain Bidirectional DC-DC Converter for Grid Integrated Solar PV Fed Telecommunication BTS Load(IEEE Computer Society help@computer.org, 2018) Sheeja, V.; Kalpana, R.In this paper, an interleaved boost based high gain bidirectional DC-DC converter for grid integrated solar PV fed telecommunication BTS (Base Transceiver Stations) load is proposed. A solar PV system is preferred to operate at low voltage due to the safety issues and the reduced power output in a series connected PV modules. The battery backup and the DC load in the system are also at low DC voltage and hence a system with low voltage DC bus is proposed. The low voltage DC bus (48V) is interfaced to high voltage (400 V) DC bus using a high gain DC-DC converter. A Voltage Source Converter (VSC) is used to connect this to the single phase AC grid of 230V. For the reliable operation of telecommunication station, the power flow has to be bidirectional. A bidirectional high gain DC-DC converter for this application is proposed and it is analysed, the expression for voltage gain is derived and the operation is verified with a MATLAB Simulink based modeling and simulation for both forward and reverse power flow. It is found that the switches are operated with less stress, the current ripple at low voltage DC bus is less and a high gain for boost and buck operation and is verified. © 2018 IEEE.Item A Novel Bi-Directional Converter for Electric Vehicle to Grid Applications(Institute of Electrical and Electronics Engineers Inc., 2020) Deepak, P.; Damodaran, R.; Balasubramanian, B.; Mudlapur, M.This paper presents a power converter system that implements bidirectional energy flow between electric vehicle and single phase grid. The proposed topology and control ensures that all major grid requirements such as unity power factor, power quality and total harmonic distortion at grid side are achieved. It also features constant charging current for battery, constant DC link voltage, fast transition in power flow from one direction to another and independent control for power supplied to grid, battery charging current and DC link voltage. The control loop and configuration are such that the system can provide boosting at multiple points and thereby the DC link voltage remains constant irrespective of the power flow direction and turns ratio of the high frequency transformer. Simulated results validate the feasibility of the system and effectiveness of its control. The nonlinearities of the system is taken into account in the simulations. © 2020 IEEE.Item Performance Analysis of Novel Multilevel Inverter with Minimum Number of Switching Components(Institute of Electrical and Electronics Engineers Inc., 2023) Kumar, T.A.; Yellasiri, Y.; Nageswar Rao, B.N.; Aditya, K.; Shiva Naik, B.S.; Karunakaran, E.The immense growth in Multilevel inverters are a great development for industrial and renewable energy applications due to their dominance over conventional two-level inverters concerning size, rating of switches, filter requirement, and efficiency. According to the current topology, the multilevel inverter employing the bidirectional converter is a DC connection that serves as the bidirectional inverter's input power. The bidirectional inverter is configured to output a voltage with several levels by altering the voltage with the bidirectional converter. Also, because there is no need for a low-frequency transformer or an LC filter at the output stage of the multi-level inverter in the present topology, the frequency does not pose any difficulties. In comparison to other traditional topologies, using an asymmetrical multilevel inverter architecture employs fewer switching components to create greater levels. This study proposes a 27-level multilevel inverter with fewer switching components. To validate the technique, the simulation results are shown. © 2023 IEEE.