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

fYear

2012

fDate

29-31 May 2012

Firstpage

1

Lastpage

6

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Energytech, 2012 IEEE

Conference_Location

Cleveland, OH

Print_ISBN

978-1-4673-1836-5

Electronic_ISBN

978-1-4673-1834-1

Type

conf

DOI

10.1109/EnergyTech.2012.6304697

Filename

6304697