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Transformer winding deformation？is
one of the main types of transformer faults.
To check if a power transformer is being under winding deformation, the
transformer can be connected in a current transformer during its testing. A
transformer winding simulating model is set up under this connecting manner.
Then the simulation has been performed with？current source which is
the frequency sweep power. The simulation results show that the winding
deformation can be reflected effectively with current
method lays the foundation for the realization of on-line monitoring and
diagnosis of the transformer
neutral directly grounded side winding.
methods (SEM) are superior to general finite element methods (FEM) in achieving
high order accuracy through p-type refinement. Owing to orthogonal polynomials
in both expansion and test functions, the discretization errors in SEM could be
reduced exponentially to machine zero so that the spectral convergence rate can
be achieved. Inherited the advantage of FEM, SEM can enhance resolution via
both h-type and p-type mesh-refinement. A penalty method was utilized to
compute force fields in particulate flows involving freely moving rigid
particles. Results were analyzed and comparisons were made; therefore, this
penalty-implemented SEM was proven to be a viable method for two-phase flow