European Design and Automation Association
The authors propose a Block-Diagonal Structured Model order reduction (BDSM) scheme for fast power grid analysis. Compared with existing power grid Model Order Reduction (MOR) methods, BDSM has several advantages. Unlike many power grid reductions that are based on terminal reduction and thus error-prone, BDSM utilizes an exact column-by-column moment matching to provide higher numerical accuracy. With similar accuracy and macromodel size, BDSM generates very sparse block-diagonal Reduced-Order Models (ROMs) for massive-port systems at a lower cost, whereas traditional algorithms such as PRIMA produce full dense models inefficient for the subsequent simulation. Different from those MOR schemes based on Extended Krylov Subspace (EKS) technique, BDSM is input-signal independent, so the resulting ROM is reusable under different excitations.