In order to identify various kinds of combined power quality disturbances. the singular value decomposition (SVD) and the improved total least squares-estimation of signal parameters via rotational invariance techniques (TLS-ESPRIT) are combined as the basis of disturbance identification in this paper. SVD is applied to identify the catastrophe points of disturbance intervals. based o... https://parisnaturalfoodes.shop/product-category/calendula-lotion-baby/