ANALYSIS OF GRID INTERCONNECTION PROBLEMS OF SHP PLANTS

Abstract

Electricity grid interconnections have played a key role in the history of electric power systems. The greatest benefits of interconnection are usually derived from synchronous AC operation, but this can also entail greater reliability risks. An alternative energy supply to assist the main power stations in future is expected from renewable energy sources based on distributed generation like Small hydropower power plant (SHP). SHP capacity has experienced tremendous growth in the past decade due to its environmental benefits, technological advances and government incentives. This dissertation report describes the grid interconnection elements, problems associated with grid interconnection and SHP station operation during grid connected mode, Modelling and Simulation of grid connected SHP, modelling of synchronous generator, Excitation systems, Hydro turbine and governor. This report includes five different type models which is run in the MATLAB software. These models are synchronous generator connected with light load, Synchronous generator in grid connected mode, Synchronous generator in grid connected mode during Fault, Two synchronous generator connected with grid and Synchronous generator in grid connected mode during suddenly load change. The simulated systems consist of synchronous generator of 325kVA, 415V, 3 phase, 50 Hz. After running the each model in MATLAB software observing the waveforms of Rotor speed, Excitation voltage, stator current, stator voltage, load current and load voltage. Analysing this waveform and able to observe the steady state time, transient duration, effect on waveforms at different condition and include recommendation in this content synchronization technique, frequency control of grid and Fault control of grid and micro