Comprehensive fire fighting system and comprehensive fire fighting method of large-size oil-containing equipment of transformer substation

The invention provides a comprehensive fire fighting system of large-size oil-containing equipment of a transformer substation. The comprehensive fire fighting system comprises a main controller, an oil discharging and nitrogen filling device, a dry powder fire fighting device and the oil-containing equipment of the transformer substation, wherein input and output ends of the main controller are connected with the oil discharging and nitrogen filling device and the dry powder fire fighting device respectively; the oil discharging and nitrogen filling device is used for monitoring and collecting state parameters of a transformer in real time, transmitting the state parameters to the main controller, and receiving a corresponding control signal of the main controller; and the dry powder fire fighting device is used for monitoring and collecting state parameters of the oil-containing equipment of the transformer substation in real time, transmitting the state parameters to the main controller, and receiving a corresponding control signal of the main controller. According to the comprehensive fire fighting system, an oil discharging and nitrogen filling technology is combined with a dry powder fire fighting technology; after the working condition of the large-size oil-containing equipment of the transformer substation is comprehensively considered, the automatic control is carried out and a redundancy control signal is added so that the false action and the malfunction are prevented to the greatest extent; fire fighting monitoring and automatic fire fighting functions of the large-size oil-containing equipment of the transformer substation with the power of 500kV and above are improved, so that the effects of effectively preventing and putting out fire are realized.