Optimum Operation and Maintenance of Power Grid Based on Equipment Diagnoses

The concept of Intelligent Grid Management System (IGMS) was proposed to solve the issues concerning economics aspects, aged equipment, reliability etc. in modern transmission and distribution (T&D) systems. In IGMS, the patterns of system failure were chronologically simulated using the sequential Monte Carlo method, and the total T&D cost composed of T&D loss, overload cost, outage cost, maintenance cost, repair cost etc. was estimated with nonlinear programming. The minimization procedure of the total T&D cost was clarified. And the prospects of optimizing the maintenance strategy were obtained by calculating the total T&D cost for several maintenance methods.