Automatic optimization control system and automatic optimization method for constant sliding pressure of steam turbine unit

Abstract

The invention discloses an automatic optimization control system and method of rated sliding pressure of a steam turbine unit. The system comprises a real-time data acquisition and calculation output platform and a unit computer control device; a data acquisition processing module, a data calculation processing module and a command output module are disposed inside the real-time acquisition and calculation output platform. The function of automatically correcting main steam pressure and control valve position according to heat consumption rate of the units is achieved through computer systems and devices; related parameters of the units are acquired to the real-time acquisition and calculation platform; the original parameter data is processed through the data acquisition processing module; the data calculation processing module calculates online to obtain optimal main steam pressure and optimal control valve opening and outputs a command to a unit control system; timely correction is performed when unit load is stable; accordingly, coal consumption rate is reduced.

Description

technical field [0001] The invention relates to the technical field of energy saving in thermal power plants, in particular to an automatic optimization control system for constant sliding pressure of a steam turbine unit and an automatic optimization method thereof. Background technique [0002] At present, China's electric power enterprises mainly rely on thermal power generation, and there is great pressure on energy conservation and emission reduction. Various thermal power generation companies have been exploring ways to save energy and reduce consumption, and explore ways to reduce the coal consumption rate of thermal power generation companies through operation optimization. Especially in terms of constant sliding pressure optimization of thermal power plant units, there has been no systematic and perfect means. In the prior art, the constant sliding pressure operation control of most thermal power enterprises is implemented by conducting constant sliding pressure opt...

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Problems solved by technology

However, due to the influence of factors such as the vacuum of the condenser in the above method, there is a large adjustment deviation in the implementation of the empirically determined sliding pressure curve.

Moreover, in the current AGC mode of the unit, the load of the unit fluctuates greatly. In order to improve the load response speed, the overlap degree of the high-pressure speed-regulating valve is set to be large. The actual main steam pressure often deviates from the constant sliding pressure curve, and there is a large throttling loss.

Therefore, the constant sliding pressure operation mode of the unit in the prior art cannot meet the requirements of the economical operation of the unit

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