Main parameter control system of generating set based on enthalpy value and fuel online calorific value calculation
A technology for generating sets and generating units, applied in general control systems, control/regulation systems, electrical program control, etc., can solve the problems of difficult to accurately describe the dynamic characteristics of the main steam pressure, control quality deterioration, unqualified, etc., and achieve the main parameters The effect of precise and stable, reasonable adjustment and safe operation of equipment
Active Publication Date: 2022-05-06
河北建投能源科学技术研究院有限公司
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Problems solved by technology
Due to the influence of many uncertain factors of the unit, it is difficult to accurately describe the dynamic characteristics of the main steam pressure of the supercritical unit. , and the process control of the design or actual coal type, when the unit deviates from the rated operating area or the coal type is complex and changeable, its control quality will generally deteriorate or even fail
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[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0031] A generator set main parameter control system based on enthalpy value and fuel online calorific value calculation, based on the main steam enthalpy value, flow calculation and fuel online calorific value conversion, to control the generator set load and main steam pressure, the structure of the control system Such as Figure 8 As shown, it specifically includes a boiler fuel steady state feedforward combustion rate calculation module, a boiler fuel dynamic feedforward calculation module, a superheated steam enthalpy calculation module, a main steam flow calculation module, a main steam pressure fixed value calculation module and a control module.
[0032] The superheated steam enthalpy value calculation module is used to calculate the real-time main steam, real-time saturated steam and target load main steam enthalpy values d...
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The invention discloses a main parameter control system of a generator set based on enthalpy value and fuel online calorific value calculation. control, the system specifically includes a boiler fuel steady state feedforward combustion rate calculation module, a boiler fuel dynamic feedforward calculation module, a superheated steam enthalpy calculation module, a main steam flow calculation module, a main steam pressure fixed value calculation module and a control module, The control module realizes precise control of the unit according to the results sent by the boiler fuel steady-state feedforward combustion rate calculation module and the boiler fuel dynamic feedforward calculation module. The invention enables the unit to quickly track the load command while ensuring less fluctuation of the main steam pressure, thereby ensuring the safety of the unit operation.
Description
technical field [0001] The invention relates to the technical field of load variation control of a coal-fired boiler unit in a power station, in particular to a main parameter control system of a generating unit based on enthalpy value and fuel online calorific value calculation. Background technique [0002] At present, most of the load change process control systems of coal-fired supercritical generating units in my country are designed using the indirect energy balance method, and the energy balance and coordinated control of the boiler and steam turbine of the unit are realized by combining the pressure and load deviation with the traditional PID controller. , the advantage of using this control method is that the supercritical unit follows the load command relatively quickly; the disadvantage is that it is easy to cause large fluctuations in the main steam pressure, which affects the safe and stable operation of the unit, and after the energy storage is overutilized, even...
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IPC IPC(8): G05B19/418
CPCG05B19/41865G05B2219/32252Y02P90/02
Inventor 邢红涛郭江龙刘书安牟法海阎彬王博磊刘波
Owner 河北建投能源科学技术研究院有限公司