Control method and device of boiler advanced acceleration optimization and storage medium

Abstract

The invention discloses a control method and device of boiler advanced acceleration optimization and a storage medium. The control method comprises the steps that a control instruction value of an advanced acceleration control circuit of a boiler and an instruction coefficient of a self-adaptation circuit of the boiler are obtained according to a load instruction value of a thermal power unit, specifically, the self-adaptation circuit is a control circuit which is added, the input end of the self-adaptation circuit acquires a load instruction of the thermal power unit, and the output end of the self-adaptation circuit correspondingly outputs the instruction coefficient; the control instruction value and the instruction coefficient are multiplied, so that an optimized advanced accelerationinstruction value is obtained; and the advanced acceleration instruction value and a main control instruction value of the boiler are superposed and correspondingly serve as input instruction values of a fuel main control instruction circuit, a water supply main control instruction circuit and an air volume main control instruction circuit of the thermal power unit so as to adjust the load of thethermal power unit. According to the control method and device of boiler advanced acceleration optimization and the storage medium, feedforward signals of a BIR circuit are corrected, and therefore the boiler can also well respond to the load change of the thermal power unit under the low-load working condition, and stable operation of the unit is guaranteed.

Description

technical field [0001] The invention relates to the technical field of thermal power unit operation control, in particular to a control method, device and storage medium for boiler advance acceleration optimization. Background technique [0002] Thermal power plants generally generate thermal energy through coal combustion, and then convert steam turbines into mechanical energy through steam, thereby driving generators to convert mechanical energy into electrical energy. In this process, it is necessary to control boilers, steam turbines and generators to perform a series of actions according to the electricity load demand. Among them, in order to make the boiler meet the load demand, it is necessary to control the amount of coal feed, water feed, and air distribution to meet the corresponding steam flow, temperature, and pressure. [0003] However, the response of the boiler is always delayed. In order to meet the needs of timely response to load changes, a BIR loop is gen...

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Problems solved by technology

[0003] However, the response of the boiler is always delayed. In order to meet the needs of timely response to load changes, a BIR loop is generally added to the logic to generate an advanced feed-forward signal, coupled with the boiler master control command signal, and then sent to the coal feeder, The main control circuit of the oil control valve, the fan and the feed water pump can quickly improve the response rate of the boiler to the load of the unit

[0004] However, the BIR circuit meets the system requirements when the load of the unit is 50%-100% of the rated load, but when the load is below 50% of the rated load, the conventional BIR does not take into account the ability to follow the coal, water, and wind under low loads. Weak, strong differential lead-forward feed-forward makes the adjustment effect too strong, making the adjustment loop overshoot, oscillation instability, serious damage to the unit equipment or even unplanned shutdown of the unit, and more serious system instability

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