Fluctuation Characteristics effect analysis of Solar Irradiance Data by Wavelet transform

Fluctuation of sun irradiance under multiple affected is important, and consider to the performance and reliability of the Photovoltaic (PV) power plant system. This research to propose the non-stationary characteristics detect technique by Wavelet transform, with MATLAB programming. From the experimental results, it is found. The Global irradiance component can be separated into Direct and Indirect components. The Indirect component upon scattered by passing clouds, nearby buildings, over-cast clouds etc., may have smaller or greater amplitude of are compared with Direct irradiation. An Indirect irradiation component in from time domain and frequency domain for consider to PV power plant location selection, capacity determination and power quality analysis