Coal-fired unit main steam pressure setting optimization method and related components

Abstract

The invention discloses a coal-fired unit main steam pressure setting optimization method, which comprises the following steps of: extracting historical working data, dividing the historical working data into steady-state working data and variable load initial data, modeling by using corresponding data to analyze the influence of corresponding working parameters on main steam pressure, and obtaining a main steam pressure set value of the whole production process of a coal-fired unit. The opening degree of a high control valve of the coal-fired unit and the exhaust steam pressure of a steam turbine unit are introduced into a steady-state working model and a variable-load working model, so that the main steam pressure set value is close to a main steam pressure actual value, and unit fluctuation caused by main steam pressure deviation is reduced. The dynamic change of the main steam at the initial stage of the variable load is introduced into the main steam pressure set value, so that the main steam pressure set value conforms to the dynamic characteristics of the unit. The invention further discloses a coal-fired unit main steam pressure setting optimization device and equipment and a readable storage medium, and the corresponding technical effects are achieved.

Description

technical field [0001] The invention relates to the field of coal-fired units, in particular to a method, device, equipment and readable storage medium for setting and optimizing the main steam pressure of a coal-fired unit. Background technique [0002] With the development of new energy power, the instability and volatility of the power grid has increased. Among them, coal-fired units have generally participated in the peak-shaving and frequency-regulation of the power grid, making coal-fired units often in the process of changing loads. Therefore, the production of coal-fired units The state is the transition between steady state and variable load operation, and the coal-fired unit will be constantly in the process of variable load. [0003] At present, coal-fired units have been controlled by a coordinated control system. In order to realize the stability of the coal-fired unit in the steady state operation and variable load process, the main steam pressure is introduce...

AI Technical Summary

Problems solved by technology

In order to realize the stability of the coal-fired unit in the steady state operation and variable load process, the main steam pressure is introduced as a control parameter in the coordinated control. At present, the set value of the main steam pressure is generated according to the power of the unit. Therefore, at the initial stage of variable load, the actual value of the main steam pressure deviates greatly from the set value, which affects the coal supply, makes the coal supply overshoot, and leads to a decrease in boiler efficiency; while in steady state operation, the main steam pressure When the actual value of the pressure deviates from the ideal value of the main steam pressure, it will lead to a decrease in the thermal efficiency of the unit

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