Operation control method for backpressure over-limit during peak shaving of 300MW turboset

The invention relates to an operation control method for backpressure over-limit, in particular to an operation control method for backpressure over-limit during peak shaving of a 300MW turboset. The method aims to solve the problem that no operation control method capable of avoiding backpressure over-limit during peak shaving of the 300MW turboset exists at present. The method comprises the following concrete steps of 1, judging a loading zone where the set is located to determine the load adjusting direction of the set; 2, changing the gas displacement of the set by adjusting the electric power of the set; 3, reinforcing heating network operation regulation to ensure that the return water temperature of a first-level heating network to be not more than 60 DEG C. The method is used for realizing operation control over the 300MW turboset.