2 results about "Online identification" patented technology

The invention discloses a large grid Thevenin equivalent parameter online identification method based on LU decomposition, comprising: based on the single state section data of a large grid, directlyusing a node voltage equation to obtain an open-circuit voltage at a node to be solved as a Thevenin equivalent potential and then obtaining all Thevenin equivalent parameters; when a generator node is reactive out of limit, changing the type of a PV node in order that the PV node becomes a PQ node, and quantifying and calculating the equivalent parameters; in the process of solving the open-circuit voltage of different nodes, because a constructed linear node voltage equation coefficient matrix is a constant matrix, obtaining an equation solution by using LU triangular decomposition through fast back substitution.