A Simple Cloud Simulator for Investigating the Correlation Scaling Coefficient Used in the Wavelet Variability Model (WVM)

摘要

A wavelet variability model (WVM) for simulating solar photovoltaic (PV) powerplant output given a single irradiance sensor as input has been developed and has tested well against powerplants in Ota City, Japan and Copper Mountain, Nevada [1-3]. Central to this method is a correlation scaling coefficient (A) that calibrates the decay of correlation as a function of distance and timescale, and varies by day and geographic location. For Ota City and Copper Mountain, this A value has been determined using the network of irradiance sensors located at each powerplant. However, for applying the WVM to arbitrary locations where an irradiance sensor network is not readily available, it is necessary to estimate the A value. In this paper, we examine the dependence of A values on wind speed (at cloud altitude) and cloud size using a simple cloud motion simulator.