Combustion control system and control method for power plant

Abstract

The invention discloses a combustion control system for a power plant. The combustion control system comprises a data acquisition part, a control part and an execution part. The data acquisition partcomprises a sound wave temperature measurement system and a DCS data acquisition system. The control part comprises a neural network model module, an evaluator and an optimizer. The execution part comprises a secondary air door opening degree adjusting device. The invention further discloses a combustion control method for the power plant. According to the system and the method, a neural network is adopted to construct a model, and extremely high universality and transportability are achieved. According to the system and the method, stable, long-term and manual intervention-free combustion canbe achieved for the power plant, and the purposes of reducing coal consumption and NOx and CO emissions as much as possible, reducing the combustion temperature of a hearth, uniform combusting and reducing the smoke temperature under the condition of a given load can be achieved.

Description

technical field [0001] The invention specifically relates to a power plant combustion control system and a control method. Background technique [0002] At this stage, thermal power still plays an important role in industrial production, and power plant combustion, as an important part of thermal power generation, directly affects all aspects of industrial production. With the gradual increase in the demand for electricity by industrial production enterprises, the requirements for power plant combustion efficiency, operation stability and reduction of pollutant emissions are getting higher and higher, and the requirements for its control level are also getting higher and higher. In most of the power plants in my country, the traditional control mode is still used for the combustion control of the power plant, which cannot fully meet the requirements of efficient and stable operation of boilers and low pollutant emissions. [0003] The existing boiler combustion control sche...

AI Technical Summary

Problems solved by technology

[0007] (1) The parameters in the PID control are only for specific boilers. When designing PID control schemes for different boilers, the parameters must be re-tuned, and the generality of the method is poor.

[0008] (2) In PID control, the introduction of error integral feedback will bring negative effects

The function of the error integral feedback is to eliminate the static error and improve the accuracy of the system response, but at the same time, the introduction of the error integral feedback makes the closed loop dull, easy to generate oscillation, and easy to cause saturation of the control quantity caused by integral saturation

[0009] (3) The control quantity given by the PID controller is a linear combination of the error's present, past and future, but the linear combination is not necessarily the best combination

Images