Power plant integrated control platform and control method based on field bus

The invention provides a power plant integrated control platform based on a field bus and a control method. The power plant integrated control platform comprises a system identification module, a data acquisition module, a performance optimization module and a fault diagnosis module. Operation data of each control system of the power plant are collected and uploaded to the power plant integrated control platform through a data bus, control parameters of each control system of the power plant are optimized, and the control systems of the power plant are associated, so that the collaborative operation capability of the whole system is improved; a real-time fault diagnosis model is adopted to judge the fault degree of each control system of a power plant, the fault diagnosis step length is determined according to the fault degree, whether an accurate fault diagnosis model is started or not is judged according to the fault diagnosis step length, and fault diagnosis delay and diagnosis errors are reduced; whether