Method, device and system for evaluating operation economy of triple-generation gas system

The invention discloses a method, a device and a system for evaluating the operation economy of a gas triple co-generation system, and the method comprises the following steps: S110, obtaining the original operation data of each energy subsystem in a preset gas triple co-generation system; s120, processing the original operation data through an income analysis model to obtain a total income value and a unit income value of each energy subsystem set; step S130, processing the original operation data through a cost analysis model to obtain a unit cost value and a total cost value of each energy subsystem set; step S140, various energy media are supplied to each energy subsystem set for marginal contribution data processing; and step S150, through a marginal contribution analysis model, evaluating marginal contribution states of each energy subsystem set for supplying various energy media in each scheduling period. According to the method, the problems of low theoretical property, low systematicness and low accu