Title :
A cloud shadow model and tracker suitable for studying the impact of high-penetration PV on power systems
Author :
Grady, W. Mack ; Libby, Leslie
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Texas at Austin, Austin, TX, USA
Abstract :
Field measurements show that rapid cloud movement on solar panels ramps their maximum power output from full power to about one-third of full power in approximately five seconds, and vice-versa. When combined with high-penetration PV, this ramping may introduce the old problem of voltage flicker on distribution feeders. To study the potential flicker problem, this paper presents 1. a cloud shadow model suitable for use in successive loadflow simulations of distribution feeders with distributed PV, and 2. a field testing system to measure shadow speed and heading azimuth angle.
Keywords :
clouds; distribution networks; load flow; photovoltaic power systems; power system measurement; azimuth angle heading; cloud shadow model; distribution feeder; field measurement; field testing system; high-penetration PV power system; loadflow simulation; maximum power output; rapid cloud movement; shadow speed measurement; solar panel ramp; tracker; voltage flicker problem; Equations; Load modeling; Mathematical model; Power measurement; Power systems; Sensors; Voltage fluctuations; cloud shadows; photovoltaics; power quality; voltage flicker;
Conference_Titel :
Energytech, 2012 IEEE
Conference_Location :
Cleveland, OH
Print_ISBN :
978-1-4673-1836-5
Electronic_ISBN :
978-1-4673-1834-1
DOI :
10.1109/EnergyTech.2012.6304697
