Anti-interference and energy-saving type thermal power generating unit powder making control system

Abstract

The invention provides an anti-interference and energy-saving type thermal power generating unit powder making control system. The anti-interference and energy-saving type thermal power generating unit powder making control system comprises a plurality of coal feeders, a plurality of coal mills, two primary air fans, a fuel adjusting unit and an air pressure adjusting unit. A counting module and a judgment module in the fuel adjusting unit are used for monitoring the running state of the coal mills, and once start or stop signals of the coal mills are monitored, the control system is immediately started. A fuel measuring module, a main steam pressure and fuel correcting module and a fuel output module conduct operation, then a fuel instruction is rapidly adjusted, and the stability of the fuel amount of a hearth is maintained. Meanwhile, the primary air pressure is rapidly adjusted through an air pressure correcting module, an instruction module and an adjusting module in the air pressure adjusting unit, and the dynamic matching relation between the average output of the coal mills and the primary air pressure is kept. The anti-interference and energy-saving type thermal power generating unit powder making control system solves the technical problem that in the coal mill start and stop processes, main parameters of the unit greatly fluctuate; the energy consumption of the primary air fans is reduced, blockage of the powder making control system can be prevented, and the safety performance, the stability performance and energy saving indexes of the unit are comprehensively improved.

Description

technical field [0001] The invention belongs to the technical field of automatic control of thermal power units, and relates to research on anti-interference ability, unit stability and energy saving of a thermal power unit pulverization control system, and specifically relates to an anti-interference and energy-saving thermal power unit pulverization control system. Background technique [0002] In order to meet the needs of grid AGC for deep peak regulation, the load of large thermal power units fluctuates repeatedly within the range of 50% Pe to 100% Pe. In order to ensure the AGC adjustment quality of the unit, it is necessary to design a set of reasonable pulverization control system, including: fuel control system and primary air pressure control system. [0003] The conventional fuel control system is to maintain the balance between the supply and demand of the total fuel quantity of the unit, and distribute the total fuel command to a single coal feeder so that it is...

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Problems solved by technology

[0016] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide an anti-interference and energy-saving thermal power unit pulverization control system, which can effectively solve the problem of large fluctuations in the main parameters of the unit during the start-up and stop of the coal mill, and at the same time Improve the safety and stability performance of the unit and the energy-saving index of the unit

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