Verification system and method for ultra-supercritical unit multi-time reheat steam temperature control strategy

Abstract

The invention relates to a verification system and method for an ultra-supercritical unit multi-time reheat steam temperature control strategy. Before a unit is put into operation, through the ultra-supercritical unit multi-time reheat steam temperature dynamic simulation environment, the reheat steam temperature control logics including flue gas recirculation, a swing combustor and a flue gas baffle are verified and optimized, so that the starting adjusting time of the real unit is shortened; and meanwhile, the problem that the optimization and adjustment test is limited by operation conditions when carried out on the real unit after the real unit is put into operation is solved. The system comprises a master computer, a dynamic simulation environment model, a virtual control station computer, the multi-time reheat steam temperature control logics, a virtual controller VDCS, a human-computer interface and I / O communication software. By means of the method of introducing the fineness of pulverized coal, the oxygen content, the n-time reheat steam pressures and the steam temperature correction set value, the reheat steam temperature control logics are optimized, so that high-quality control over the ultra-supercritical unit multi-time reheat steam temperature is achieved, and the needs of the ultra-supercritical multi-time reheat unit for safe, stable and efficient operation are met.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of automatic control of an ultra-supercritical unit of a power station, and in particular relates to a verification system and method for a multi-reheat steam temperature control strategy of an ultra-supercritical unit. Background technique [0003] my country's resource characteristics of "rich coal, poor oil, and little gas" determine the main position of coal-fired power generation in my country's energy structure. In the face of my country's rapid economic development, the huge pressure of power demand and environmental protection has put forward new requirements for my country's energy conservation and emission reduction, while improving the power generation efficiency of thermal power plants and reducing coal consumption for power generation, the application of ultra-supercritical secondary reheating technology will be The most effective means to reduce flue gas pollutants and carbon dioxide emi...

AI Technical Summary

Problems solved by technology

After the unit is put into operation, the test and analysis method of optimizing and adjusting the actual unit is often used. However, due to the limitation of the operating conditions of the unit, the test cannot be carried out randomly and in a large load range at any time. So far, there is no ultra-supercritical unit for actual engineering application in the initial stage of unit construction. Research on verification system and method of double reheat steam temperature control strategy

Images