The general arrangement of capacitor bank in the substation and the internal structure of individual capacitor are introduced and analyzed. Based on this

a mathematical model is established to simulate several possible damages of internal component of individual capacitor by using computation software

and then some applicable conclusions are drawn. According to the overall trend of developing smart grid in China

a system of intelligent on-line monitoring which is applicable to capacitor installation in the substation is figured out

and a pre-detection of fault symptom of the power capacitor is able to be detected

and the fault could be analyzed and located.