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Stochastic control of cooling appliances under disturbances for primary frequency reserves
ETH, EEH - Power Systems Laboratory.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Electricity.ORCID iD: 0000-0002-5361-7739
ETH, EEH - Power Systems Laboratory.
2016 (English)In: Sustainable Energy, Grids and Networks, ISSN 0284-4354, E-ISSN 2352-4677, Vol. 7, 70-79 p.Article in journal (Refereed) Published
Abstract [en]

To stabilize power system frequency both in normal operation and after a contingency, a hierarchy of distributed-proportional and centralized-integral controllers is employed in most power systems. Providing proportional control–commonly referred to as primary frequency control or droop–with conventional generators constitutes significant cost. This led to strong interest in utilizing demand response as a cost-effective primary control reserve. This paper investigates an approach that allows a population of domestic refrigerators to reliably and continuously adjust its demand proportional to system frequency. The control relies exclusively on stochastic switching of refrigerators, and thus avoids synchronization and implementation issues associated with control strategies based on temperature-band adjustments. The scheme is tested on a realistic two-area power system model to investigate interaction with system frequency. The modeling of refrigerators is refined by analyzing the effect of door openings on cooling demand, and response of the refrigerator population under these conditions is described both analytically and with simulations.

Place, publisher, year, edition, pages
2016. Vol. 7, 70-79 p.
Keyword [en]
Primary frequency reserves, frequency regulation, Demand response, Cooling appliances refrigerators, Stochastic control
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
URN: urn:nbn:se:uu:diva-305346OAI: oai:DiVA.org:uu-305346DiVA: diva2:1037392
Available from: 2016-10-14 Created: 2016-10-14 Last updated: 2016-10-17Bibliographically approved

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