A Non Intrusive Low Cost Kit for Electric Power Measuring and Energy Disaggregation

Abstract

This article presents a kit to collect data of electric loads of single and three phases main power supply of a house and perform the energy disaggregation. To collect the data, we use sensors based on an open magnetic core to measure the electromagnetic field induced by the current in the electric conducting wire in a non-intrusive way. In particular, each sensor from the three-phase device wraps/encloses each phase without alignment. To calibrate the three-phase device, we present a method to calculate the neutral RMS without complex numbers using (Analysis of Variance) ANOVA and post hoc Tukey's multiple comparison tests to assert the differences of measures among phases. We managed to validate the method using a measure reference. Additionally, to perform the energy disaggregation, we use the NILMTK tool. This tool compares disaggregation algorithms on many public datasets. We use in our system two disaggregation algorithms Combinatorial Optimization and Factorial Hidden Markov Model algorithms. The results show that is possible to collect and perform energy disaggregation through our embedded system.

Current Measurement and Fault Detection Based on the Non-Invasive Smart Internet of Things Technique

“…It is difficult and expensive to deploy plug-load with split-core devices with genuine power and actual power measurements with phase angles, but the resulting algorithm for whole-line analysis is highly effective. It is possible to categorise the unseen parts as [10][11][12][13][14]:…”

SmartOffice: Sala inteligente baseada numa arquitetura de sensores não intrusivos e técnicas de inteligência computacional

“…O nó 1 representado pela figura 2é composto por um Arduino UNO, um sensor DHT11 [Ltd. 2010] para o monitoramento da temperatura e umidade, um sensor de luminosidade LDR [Technologies 2010] que monitora a luminância do ambiente, quatro relés que atuam como chaves magnéticas para ligar e desligar as lâmpadas, um transmissor infravermelho para controlar o ar-condicionado da sala, e um módulo de rádio NRF24L01 para comunicação. O monitoramento do consumo da carga elétrica do ambienteé realizado pelo dispositivo apresentado na figura 3, desenvolvido por [Quindai et al 2018], este nó será utilizado para medir o consumo da carga do ambiente que o sistema está inserido, composto por um Arduino UNO, um RTC (Real Time Clock) [Integrated 2015], um módulo NRF24L01 e três sensores de corrente não invasivos do tipo 100A SCR013.…”