%0 Journal Article %T Harmonic Analysis of Distributed PV System Under High and Low Irradiance %A R.Valarmathi %A A.Chilambuchelvan %J International Journal of Engineering and Technology %D 2010 %I Engg Journals Publications %X This paper presents a unique modelling of harmonics and comparison between high irradiance and low irradiance in PV system connected to a grid. The signals used are actual tested waveforms in a distributed PV system. The percentage error has been calculated for the individual parameters in both cases. The comparative study using Chirp Z transform (CZT) with 7 term B Harris Window will enable to model harmonics using this algorithm in the future. The paper shows the performance of the method proposed in different measurement conditions. %K Chirp Z transform %K Harmonic Analysis %K Power factor %U http://www.enggjournals.com/ijet/docs/IJET10-02-03-04.pdf