Short paper: Hypertemporal imaging of NYC grid dynamics

Federica B. Bianco, Steven E. Koonin, Charlie Mydlarz, Mohit S. Sharma

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Hypertemporal visible imaging of an urban lightscape can reveal the phase of the electrical grid granular to individual housing units. In contrast to in-situ monitoring or metering, this method offers broad, persistent, real-time, and non-permissive coverage through a single camera sited at an urban vantage point. Rapid changes in the phase of individual housing units signal changes in load (e.g., appliances turning on and off), while slower building-or neighborhood-level changes can indicate the health of distribution transformers. We demonstrate the concept by observing the 120 Hz flicker of lights across a NYC skyline. A liquid crystal shutter driven at 119.75 Hz down-converts the flicker to 0.25 Hz, which is imaged at a 4 Hz cadence by an inexpensive CCD camera; the grid phase of each source is determined by analysis of its sinusoidal light curve over an imaging "burst" of some 25 seconds. Analysis of bursts taken at ∼ 15 minute cadence over several hours demonstrates both the stability and variation of phases of halogen, incandescent, and some fluorescent lights. Correlation of such results with ground-truth data will validate a method that could be applied to better monitor electricity consumption and distribution in both developed and developing cities.

Original languageEnglish (US)
Title of host publicationProceedings of the 3rd ACM Conference on Systems for Energy-Efficient Built Environments, BuildSys 2016
PublisherAssociation for Computing Machinery, Inc
Pages61-64
Number of pages4
ISBN (Electronic)9781450342643
DOIs
StatePublished - Nov 16 2016
Event3rd ACM Conference on Systems for Energy-Efficient Built Environments, BuildSys 2016 - Stanford, United States
Duration: Nov 15 2016Nov 17 2016

Publication series

NameProceedings of the 3rd ACM Conference on Systems for Energy-Efficient Built Environments, BuildSys 2016

Other

Other3rd ACM Conference on Systems for Energy-Efficient Built Environments, BuildSys 2016
CountryUnited States
CityStanford
Period11/15/1611/17/16

Keywords

  • Imaging
  • Time series analysis
  • Urban science: observing techniques

ASJC Scopus subject areas

  • Information Systems
  • Building and Construction
  • Electrical and Electronic Engineering
  • Computer Networks and Communications
  • Renewable Energy, Sustainability and the Environment
  • Architecture

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