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Research of passive filter device in high voltage intelligence

A passive filter often becomes a key component for the electrical power system. The optimization design of passive filter is the most effective way in performance improving. The formula of calculating the gradient vector and the Hessian matrix is researched and presented. Based on this formula, the objective function of optimization design for filter with loss is derived and the suitable optimization algorithms is made by using the extended circuit technique. The example of flexible and efficient design technique of passive filter is also proved.