Heat supply and air exhaust control method and system for thermal power generating unit

The invention discloses a heat supply and air exhaust control method and system for a thermal power generating unit, and relates to the technical field of automation control. The method comprises the steps that system structure information of a target heat supply system is obtained through interaction; carrying out sensor layout to obtain a target sensor array; the pressure range and the temperature range of the heat supply system are determined interactively; dynamically comparing the obtained real-time temperature and pressure data to obtain real-time temperature deviation and real-time pressure deviation; an air exhaust negative feedback control model is pre-constructed, the K real-time temperature deviations and the K real-time pressure deviations are synchronized to the air exhaust negative feedback control model for heat supply air exhaust control analysis, and steam flow adjusting parameters are obtained; and the steam flow adjusting parameters are adopted for controlling heat supply and air exhaust of