Low-load period heat supply steam pressure adjusting method and device, controller and medium

Abstract

The invention relates to a low-load period heat supply steam pressure adjusting method and device, a controller and a medium, and the method comprises the following steps: S1, obtaining heat supply unit data, judging whether a control loop input condition is met or not, if yes, entering a step S2, and if not, returning to the step S1 until the loop input condition is met; S2, obtaining the load of the unit in real time, when the load is larger than or equal to the set peak load, adjusting the opening degree of the medium-voltage control valve to 100%, and otherwise, adjusting the opening degree of the medium-voltage control valve to the opening degree value of the medium-voltage control valve corresponding to the load of the unit; in the step S2, obtaining heat supply unit data in real time, judging whether the loop quit condition is met or not, and if yes, stopping adjustment of the middle valve control valve opening value. Compared with the prior art, stable and reliable external steam supply can be realized in a wide load interval, and the operation flexibility of a unit is improved.

Description

technical field [0001] The invention relates to the field of thermal power generation, in particular to a method, equipment, controller and medium for adjusting the pressure of heating steam during low-load periods. Background technique [0002] In recent years, with the gradual easing of the electricity load tension of the whole society and the increasing pressure of energy conservation and emission reduction, some large power plants have laid heat supply pipe networks to extract steam for heat supply to adjacent industrial parks. Heat supply is to extract steam with a certain temperature and pressure from the steam turbine for external heat users after expansion and work, and it is one of the important ways for the unit to save energy and reduce consumption. As the proportion of renewable energy power generation continues to increase, the operation mode of thermal power generating units has gradually changed from bearing base load to operating at intermediate and peak load...

AI Technical Summary

Problems solved by technology

Due to the special requirements of the production process, the industrial heat users require relatively stable steam pressure and temperature parameters, while the steam supply parameters of the power plant cannot meet the stable requirements of industrial steam parameters due to load fluctuations, especially when the unit is in a low-load period , its extraction parameters are often difficult to guarantee the user's heating demand

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