Nonintrusive load decomposition technology based on current sparsity underdetermined solution
Xin Wu, XIAO JUAN HAN · IEEJ Transactions on Electrical and Electronic Engineering · 2017
Nonintrusive load decomposition is the key technology to realize power load monitoring. The load decomposition is realized by the underdetermined solution of the current signal, and the complete current of each independent load is obtained. The model is optimized using the user's load operating habits and converted into a one‐dimensional underdetermined problem to establish the solution model based on unit time interval to separate only two channels of signals from the acquisition signal. The optimal solution is obtained through the two‐step iterative shrinkage threshold algorithm according to the frequency‐domain sparsity of the current, so that each load is decomposed independently. The validity of the method is verified by the measured electrical data.