Circuit breaker porcelain bushing flashover identification method and system

The invention discloses a circuit breaker porcelain bushing flashover identification method and system. The method comprises the following steps: 1, setting circuit breaker ABC three-phase porcelain bushing surrounding electric field intensity measurement points; 2, acquiring the power frequency electric field intensity of a measurement point position on line; 3, fitting a three-phase electric field intensity value U-shaped curve by utilizing the electric field intensity values obtained by the measurement point positions; and 4, identifying whether the circuit breaker has a porcelain bushing flashover fault or not according to the three-phase electric field intensity value U-shaped curve obtained by fitting. By utilizing the U-shaped symmetry of the electric field intensity near the three-phase porcelain bushing, the online identification of the flashover fault of the porcelain bushing of the circuit breaker can be realized, the monitoring level of the flashover fault of the porcelain bushing of the circuit b