For a grid connected micro hydropower (MHP) system, power electronics and phase locked looprnwas designed and simulated in this research. The grid interconnection of MHP improve thernreliability of the grid and helps to decrease transmission and distribution losses. However, thernsynchronization with the utility grid is the main concern of the inverter control design because therngrid frequency, phase and voltage need to be tracked. If the inverter output cannot meet the localrngrid connection criteria, the power will not be allowed to deliver. rnIn this research, mathematical modeling of micro hydro power plant has been done. The full bridgernthree phase diode rectifier, boost converter, inverter and LC filter are designed to connect the powerrngenerated to the grid. Then, by injecting the grid voltage signal in to the PLL, the phase voltagernfrequency and phase angle has been tracked to synchronize phase, frequency and voltage of therngenerated power with different grid condition. rnIt is observed from the simulation results that for ideal grid conditions the phase angle was trackedrnand relatively faster and also precisely. Also the system can easily track the phase when thernfrequency was changed from 50Hz to 55Hz or 45Hz. The only difference from the ideal case is thatrnthe PI-regulator now approaches 2Ï€*5rad/s for 55 Hz and -2Ï€*5rad/s for 45Hz instead of zero.rnMoreover, different non-ideal grid conditions were simulated and almost handled by the system.