Thermal power generation boiler main steam temperature control system based on hybrid intelligent optimization algorithm

Abstract

The invention discloses a thermal power generation boiler main steam temperature control system based on a hybrid intelligent optimization algorithm. The system comprises a boiler main steam temperature cascade control system and an RBF-hybrid optimization algorithm controller serving as a main regulator for main steam temperature control. According to the boiler main steam temperature cascade control system, a leading area steam temperature PID controller serves as an auxiliary regulator and is used for coarse regulation of main steam temperature and quick response to generated interference; the RBF-hybrid optimization algorithm controller is formed by combining an RBF neural network boiler main steam temperature identification model and a hybrid optimization algorithm. And the main steam temperature is finely adjusted, so that the interference of the characteristics of strong hysteresis quality, large inertia and the like of the main steam temperature on the system can be quickly eliminated.

Description

technical field [0001] The invention relates to the technical field of combustion optimization of thermal power generation boilers, in particular to a main steam temperature control system of a power generation boiler. Background technique [0002] The superheater of a power generation boiler operates in a high temperature and high pressure environment, and the temperature of the superheated steam at the outlet is one of the main parameters of the boiler operation, which has a significant impact on the safe and economic operation of the power plant. If the main steam temperature is too high, the operation safety of the unit will be reduced. If the main steam temperature is too low, the thermal efficiency of the unit will be reduced, and the economy will not be guaranteed. At the same time, the low temperature of the main steam will increase the water content of the steam, thereby shortening the service life of the steam turbine. Therefore, the main steam temperature of the...

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Problems solved by technology

[0003] At present, the main steam temperature control system of thermal power units generally adopts the traditional PID cascade control. Although this control scheme is easy to debug on site, it cannot adapt to the characteristics of variable parameters, large inertia, and large time delay of the main steam temperature control system, which leads to the main The steam temperature automatic control system generally has a good automatic control quality when the load is stable, but in the process of load changes, start / stop coal mills, etc., the main steam temperature fluctuates greatly, and even the automatic cannot be put into operation, resulting in increased labor intensity for operators and unit output. and reduced safety and economics

[0004] Aiming at the problem that the control of the main steam temperature in the existing technology can not take into account the control of the main steam temperature of the boiler and its application in the actual industrial field, in order to solve the above-mentioned production technical problems, the present invention provides a method for controlling the main steam temperature of a power generation boiler , this method is applicable to the DCS system, which can reduce the work intensity of the on-site operators, improve the operating economy of the unit, and make the system have strong stability

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