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The finite element method (FEM) is used in a variety of numerical simulations to solve partial differential equations (PDEs) in solving a large linear system of equations at one of the computational phases. The cost of solving a large linear system with a linear solver often overwhelms with other computational phases in FEM analysis. For this reason, graphics processing units (GPUs) are widely adopted...
We developed a constrained state estimation method that clarifies the range of the feeder voltage in an unobservable distribution network in which the number of telemetric sensors is smaller than the number of state variables to be estimated. Instead of using pseudo-measurements, whose reliability is affected by unexpected power flow conditions, the method uses constant nominal boundaries as inequality...
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