DocumentCode :
49686
Title :
Aggregate Flexibility of Thermostatically Controlled Loads
Author :
He Hao ; Sanandaji, Borhan M. ; Poolla, K. ; Vincent, Tyrone L.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Univ. of California, Berkeley, Berkeley, CA, USA
Volume :
30
Issue :
1
fYear :
2015
fDate :
Jan. 2015
Firstpage :
189
Lastpage :
198
Abstract :
It is widely accepted that thermostatically controlled loads (TCLs) can be used to provide regulation reserve to the grid. We first argue that the aggregate flexibility offered by a collection of TCLs can be succinctly modeled as a stochastic battery with dissipation. We next characterize the power limits and energy capacity of this battery model in terms of TCL parameters and random exogenous variables such as ambient temperature and user-specified set-points. We then describe a direct load control architecture for regulation service provision. Here, we use a priority-stack-based control framework to select which TCLs to control at any time. The control objective is for the aggregate power deviation from baseline to track an automatic generation control signal supplied by the system operator. Simulation studies suggest the practical promise of our methods.
Keywords :
frequency control; load regulation; power grids; power system control; ambient temperature; automatic generation control; battery model; direct load control; energy capacity; priority-stack-based control; stochastic battery; thermostatically controlled loads; Aggregates; Batteries; Frequency control; Load modeling; Mathematical model; Sociology; Statistics; Coordinated aggregation; demand response; frequency regulation; generalized battery model; load flexibility; smart grid; thermostatically controlled loads;
fLanguage :
English
Journal_Title :
Power Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-8950
Type :
jour
DOI :
10.1109/TPWRS.2014.2328865
Filename :
6832599
Link To Document :
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