Developing a Microgrid (MG) system supplied with feasible integratedrnmicrosources, such as renewable energy sources and fuel cell, is one of thernmajor solutions to be envisaged in terms of the current trend of powerrndemand, i.e. efficient, environmentally friendly and relatively cheap means ofrnpower generation. In a Microgrid the most indispensible devices are the PowerrnElectronic Interfaces and Controllers which regulate electrical parameters ofrnthe microsources. rnThis research provides comprehensive overview, design and modelling ofrnPower electronic interface (PEI) and Microsource Controllers (MCs) for arnMicrogrid supplied with Photovoltaic (PV) and Integrated Solid Oxide FuelrnCell/Gas Turbine (ISOFCGT). The PEIs to be designed includes Inverters and DCDCrnboostrnconverterrnforrnthernthreernmicrosources,rnPV,rnSOFCrnandrnGT,rnandrnrectifierrnrnforrnthernGasrnTurbinern(GT)rnunit.rnTornavoidrnusernofrntransformerrninrnthernMG,rntwo-stagernrnDC-DCrnrnboost converter is used. For the ease of controlling and reduction ofrnTHD, SPWM technique of inversion is applied. rn In designing Microsource Controller a control technique known as Drooprncontrol, in which active and reactive powers are controlled during gridconnectedrnmodernofrnoperationrnofrnthernMicrogrid,rnandrnvoltagernandrnfrequencyrnarernrncontrolledrnrnin island mode, is considered as a better option. By doing so therncontrol of microsources is distributed and proportional power sharing amongrnmicrosources is facilitated so that reliability of control is ensured as there is norncentral control unit which needs communication facilities. rnIn the Microgrid the PV is not dispatchable unless it is backed by batteryrnstorage system due to the intermittent nature of the solar power. But the costrnof battery for PVs is very expensive and makes the system sophisticated due tornpower electronic interface for charging and other ancillary devices like chargerncontroller. There is the possibility of not to use the battery and the ancillaryrndevices by using the SOFC microsource instead of the battery storage systemrnwhen the solar power is reduced or completely unavailable. So this thesis alsornconsiders the possible mechanism of sensing the intermittency of the solar power in such a way that the SOFCGT can take over the PVs in partial orrncompletely. rnThe designed PEIs could make the microsources to be integrated in to thernproposed MG by converting their original DC and high frequency AC sources inrnto standard three phase AC wave forms of 380 V and 50 Hz. Also using therndesigned Microsource Controller it is possible to control V, f, P and Q byrnensuring proportional power sharing among the microsources. rnMATLAB/SIMULINK-Simpowersystem is used to simulate the designed PEIs andrnthe MCs based on a model Microgrid so that the performance characteristicsrnof the two systems can be demonstrated practically.