PV output smoothing with energy storage.

Ellis, Abraham ; Schoenwald, David Alan

Sandia National Laboratories

关键词: 25 Energy Storage;    Solar Energy;    14 Solar Energy;    Clouds;    Implementation;   

DOI  :  10.2172/1039003
RP-ID  :  SAND2012-1772
RP-ID  :  AC04-94AL85000
RP-ID  :  1039003

美国|英语

来源: UNT Digital Library

【 摘 要 】

This report describes an algorithm, implemented in Matlab/Simulink, designed to reduce the variability of photovoltaic (PV) power output by using a battery. The purpose of the battery is to add power to the PV output (or subtract) to smooth out the high frequency components of the PV power that that occur during periods with transient cloud shadows on the PV array. The control system is challenged with the task of reducing short-term PV output variability while avoiding overworking the battery both in terms of capacity and ramp capability. The algorithm proposed by Sandia is purposely very simple to facilitate implementation in a real-time controller. The control structure has two additional inputs to which the battery can respond. For example, the battery could respond to PV variability, load variability or area control error (ACE) or a combination of the three.