Voltage quality detection of micro turbine generating units using wavelet analysis

Generating units are distributed throughout the power system closer to the loads in a distribution system. The normal distribution system delivers electric energy to a large number of loads from a single source of power. There will be several sources in a DG system. Hence many power quality issues may arise. In this paper micro turbine generating unit is considered as distributed generating unit. Due to high speed of micro turbine, the output frequency of the generator is also high. Hence this frequency is to be reduced to match with the grid frequency. This is done using a conventional converter normally. A matrix converter is proposed for the same purpose. Here it is shown that a matrix converter is better than conventional converter. Also THD analysis of output voltage of DG system with matrix converter at different load conditions is carried out with FFT and wavelet packet transform using MATLAB/SIMULINK.