Full-load-section reheat steam temperature intelligent control system

Abstract

The invention relates to the technical field of reheat steam temperature control, in particular to a full-load-section reheat steam temperature intelligent control system comprising an intelligent control system, a desuperheating water control system, a smoke baffle control system and an advanced control policy. The intelligent control system is composed of an autonomous auxiliary control system and a serial unit distributed control system. The autonomous auxiliary control system and the serial unit distributed control system achieve serial connection and communication by means of the serial port MODBUS communication protocol through a communication cable. The advanced control strategy is brought into the reheat steam temperature optimal control system of the whole unit, so that the quality of a reheat steam temperature adjustment loop of a power station boiler can be greatly improved. Intelligent optimization and modification of the reheat steam temperature control system is successively achieved. The overall safety and economical efficiency of a generator set are both significantly improved.

Description

technical field [0001] The invention relates to the technical field of intelligent control of reheating steam temperature, in particular to an intelligent control system of reheating temperature in a full load section. Background technique [0002] As we all know, the reheat steam temperature control of power plant boilers is one of the technical problems that plague the thermal control field. Under the background of frequent load changes of domestic generator sets, it is not an exaggeration to call the optimal control of reheat steam temperature a "world problem". For this reason, the thermal control circle has carried out a lot of research and experiment work on it. [0003] At present, in the reheating steam temperature control of power plant boilers, the control methods usually used include: water spray (accident or trace) temperature reduction control, burner swing angle control, and tail flue flue gas baffle control, etc. Water injection regulation is a control metho...

AI Technical Summary

Problems solved by technology

[0006] At present, most of the reheated flue gas baffles still adopt the traditional PID control strategy. This post-control method is difficult for the control quality of the large-delay and pure-delay control object to meet the steam temperature during the unit load change process. smooth control

The actual operation results have brought about such phenomena as untimely adjustment, overheating of the pipe wall, excessive water spray volume (every 1% increase in water spray volume, the cycle efficiency of the unit decreases by 0.1%-0.2%), and high operating intensity.

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