ZVS-ZCS High Voltage Gain Integrated Boost Converter For DC Microgrid Abstract: A non-isolated soft switched integrated boost converter having high voltage gain is proposed for the module integrated PV systems, fuel cells and other low voltage energy sources. Here a bidirectional boost converter is integrated with a resonant voltage quadrupler cell to obtain higher voltage gain. The auxiliary switch of the converter, which is connected to the output port acts as an active clamp circuit. Hence ZVS (zero voltage switching) turn on of the MOSFET switches are achieved. Coupled inductor’s leakage energy is recycled to the output port through this auxiliary switch. In the proposed converter, all the diodes of the quadrupler cell are turned off with ZCS (zero current switching). This considerably reduces the high frequency turn off losses and reverse recovery losses of the diodes. ZCS turn off of the diodes also remove the diode voltage ringing caused due to the interaction of the parasitic capacitance of the diodes and the leakage inductance of the coupled inductor. Hence to protect the diodes from the voltage spikes, snubbers are not required. The voltage stress on all the MOSFETs and diodes are lower. This helps to choose switches of low voltage rating (low RDS(ON)) and thus improve the efficiency. Design and mathematical analysis of the proposed converter are made. A 250W prototype of the converter is built to verify the performance. Existing system: In a conventional boost converter obtaining a high voltage gain is limited by the poor efficiency operation caused due to the conduction losses and diodes reverse recovery losses. Among the various non-isolated high gain dc-dc converters, coupled inductor based converters are attractive due to the freedom of increasing the voltage conversion gain by simply changing the turn’s ratio. Proposed system: In the proposed system, a non-isolated, soft switched integrated boost converter is proposed for dc microgrid. A resonant voltage quadrupler cell is integrated at the secondary terminals of the coupled inductor to obtain high voltage gain. The energy of the coupled inductor is transferred to the voltage multiplier cell during all the switching state of the MOSFET switch. Hence instead of a large magnetic core, a small sized core can be utilized to construct the coupled inductor. Thus overall power density of the converter is improved. Coupled inductor’s leakage energy is recycled to the output port by utilizing the boost integration technique. Circuit diagram: Applications: Applications like regulated power supply, output voltage is regulated by voltage mode or current mode control. Reference:  J. M. Carrasco, L. G. Franquelo, J. T. Bialasiewicz, E. Galv´an, R. C. P. Guisado, M. A´ . M. Prats, J. I. Leo´n, and N. Moreno-Alfonso, “Powerelectronic systems for the grid integration of renewable energy sources: A survey,” IEEE Trans. Ind. Electron., vol. 53, no. 4, pp. 1002–1016, Jun. 2006.  K. Sun, L. Zhang, Y. Xing, and J. M. Guerrero, “A distributed control strategy based on dc bus signaling for modular photovoltaic generation systems with battery energy storage,” IEEE Trans. Power Electron., vol. 26, no. 10, pp. 3032–3045, Oct. 2011.  S. Sathyan, H. M. Suryawanshi, M. S. Ballal, and A. B. Shitole, “Softswitching dc-dc converter for distributed energy sources with high stepup voltage capability,” IEEE Trans. Ind. Electron., vol. 62, no. 11, pp. 7039–7050, Nov. 2015.