Energy saving is important for preserving the environment and for reducing energy bills, but efficient tools to reduce domestic electricity consumption are not easy to find and implement. Systems able to disaggregate the global electricity consumption would greatly help the consumer finding out which equipment should be replaced and/or which behaviour should be modified. The HES-SO Valais-Wallis and its partners are currently working in this direction. A data acquisition system able to measure the three phases of a standard household has been developed and was currently deployed in fifty households for a month. A simulator of the main contributors has also been created. The simulator is a powerful tool to initially test different disaggregation algorithms as it provides an a priori knowledge of the appliances and therefore allows quantitative evaluations of the performances.
Research in this field is moving fast. Likewise, smart meters, which were initially developed for remote monitoring and billing purposes, are becoming more and more efficient, meeting the desired requirements (precision of a few Watts and data accessible each second). Qualitative evaluations of different output of the simulator have shown a good match between simulated and “real-world” measurements. The simulator is a powerful tool to test disaggregation algorithms as it provides an a priori knowledge of the different appliances and therefore allows quantitative evaluations of the performances. This a priori knowledge could be obtained for “real-world” measurements using individual meters for each appliance, but generates high investments and operating costs. Based on the recorded data and the simulator, different approaches for disaggregation algorithms are currently investigated with encouraging results.
Domestic electricity measures