Event-Based Non-Intrusive Home Current Measurement Using Sensor Array

Juncheng Wang*, Guangchao Geng, Kun-Long Chen, Hao Liang, Wilsun Xu

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

13 Citations (Scopus)


This paper presents a novel method for non-intrusive home current measurement using an array of magnetic field sensors. It is specifically designed for measuring the real-time currents on three wires, including two hot wires and one neutral wire, enclosed in the electric conduits of North American homes. The key idea is to extract information from appliance state changing events captured by sensor measurement changes. Since each detected event only corresponds to two wires between which the state-changing appliance is connected, the events can be clustered according to the wire connections. Wire position identification is formulated as a nonlinear least square problem and is efficiently solved. Then, real-time current measurement is achieved by using the trans-impedance matrix built based on the solved wire positions and the sensor parameters obtained from the manufacturing process. The proposed method is evaluated by extensive laboratory and field tests.
Original languageEnglish
Pages (from-to)5878-5886
Number of pages9
JournalIEEE Transactions on Smart Grid
Issue number6
Early online date25 Apr 2017
Publication statusPublished - Nov 2018

User-Defined Keywords

  • Event detection and clustering
  • Magnetic field sensor
  • Non-intrusive
  • Current measurement
  • Nonlinear least square
  • Sensor array


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