Method and device for disequilibrium deviation control and automatic control system for thermal power plant

The invention relates to the field of thermal control and automation and discloses a method and device for disequilibrium deviation control and an automatic control system for a thermal power plant. The method for disequilibrium deviation control comprises the steps of calculating deviation of a measured value and a set value of a measured object; calculating a change rate of the measured value; and adjusting the set value according to the deviation and the change rate, so that positive deviation and negative deviation of the set value are different. According to the method and device for disequilibrium deviation control and the automatic control system for the thermal power plant, the effect of non-linear conversion of a deviation value of the automatic control system is achieved, values of the positive deviation and the negative deviation entering a regulator of the automatic control system are different, and thus the requirements on different positive deviation and negative deviation overshoots of the auto