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Experimental Evidence on Latency in a Fleet of Controllable Water Heaters

by Evgeniya Tsybina, Viswadeep Lebakula, Justin Hill, Jeffrey D Munk, Helia Zandi
Publication Type
Conference Paper
Book Title
2023 IEEE Green Energy and Smart Systems Conference (IGESSC)
Publication Date
Page Numbers
1 to 5
Publisher Location
New Jersey, United States of America
Conference Name
IEEE Green Energy and Smart Systems Conference (IGESSC)
Conference Location
Long Beach, California, United States of America
Conference Sponsor
Conference Date

Demand response is an important emerging part of smart grids with wide coverage in theoretical and modeling research. However, experimental evidence on the real-life behavior of controllable loads is still limited. We present observations regarding latency and communication aspects of the operation on a fleet of residential water heaters in a smart neighborhood in Atlanta, GA. Our analysis shows that latency in water heaters is not constant and does not follow a Gaussian distribution. We also find that there is a systematic relationship between latency and hour of the day. Latency was found to increase during morning and evening hours compared to the afternoon. These findings could help better plan deployment of control for demand response programs. Understanding delays associated with controlling smart devices is crucial for proper design and algorithm development for optimization, frequency of dispatch, and override detection.