WO2020181679A1 - 一种计及燃煤锅炉蓄㶲修正的瞬态变负荷给煤量控制方法 - Google Patents

一种计及燃煤锅炉蓄㶲修正的瞬态变负荷给煤量控制方法 Download PDF

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WO2020181679A1
WO2020181679A1 PCT/CN2019/092431 CN2019092431W WO2020181679A1 WO 2020181679 A1 WO2020181679 A1 WO 2020181679A1 CN 2019092431 W CN2019092431 W CN 2019092431W WO 2020181679 A1 WO2020181679 A1 WO 2020181679A1
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boiler
coal
storage
temperature
working fluid
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刘明
赵永亮
严俊杰
种道彤
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Xian Jiaotong University
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Program-control systems
    • G05B19/02—Program-control systems electric
    • G05B19/04—Program control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Program control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0426—Programming the control sequence
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B35/00—Control systems for steam boilers
    • F22B35/18—Applications of computers to steam-boiler control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
    • G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Program-control systems
    • G05B19/02—Program-control systems electric
    • G05B19/04—Program control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Program control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/26—Pc applications
    • G05B2219/2639—Energy management, use maximum of cheap power, keep peak load low

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  • the invention belongs to the technical field of thermal power control in thermal power plants, and specifically relates to a coal-fired boiler storage Modified method for controlling coal feed rate with transient variable load.
  • the present invention focuses on the transient variable load process in which coal-fired units participate in the adjustment of operational flexibility, revises the boiler water-to-coal ratio control strategy of existing coal-fired units, and strives to recover the essence of heat storage and charge and discharge from transient variable loads -Storage Set out to solve the conflicting problems of flexibility, safety and economy encountered by coal-fired units; provide a method that takes into account the storage of coal-fired boilers Modified transient variable load coal feed control method, which can be based on the steady state and variable load transient process of the boiler system.
  • the amount of change, the feed-forward adjustment of the coal feed at the inlet of the boiler, so as to realize the dynamic and precise control of the coal at the inlet, ensure the stability of the parameters of each thermal equipment, improve the taste of the outlet parameters of the unit, and weaken the effect of heat storage inertia and delay, thereby Significantly improve system economy and safety;
  • the modified transient variable load coal feed rate control method is based on the storage of the coal-fired unit’s boiler system in the steady state and transient variable load processes.
  • the change amount is used as the feedforward signal for the main steam temperature control of the boiler to correct the coal feed amount of the boiler during the transient load change process; the specific steps are as follows:
  • the pressure P s, i of the working fluid in the boiler superheater i is obtained through the pressure sensor
  • the working fluid temperature T s,i of the boiler superheater i and the temperature T w of the metal heating surface are obtained through the temperature sensor ,i , and then check the water and steam properties calculation table to obtain the total storage of the boiler superheater i in the current state Ex i , total savings
  • the value Ex i includes two parts, the working fluid and the metal heating surface. the amount:
  • Ex s,i and Ex m,i are the working fluid in the boiler superheater i and the storage of the metal heating surface respectively Quantity, kJ; M s and M m are the mass of the working fluid and metal heating surface in the superheater i, kg; T 0 is the ambient temperature, K; u 0 is the enthalpy value corresponding to the ambient temperature and ambient pressure, kJ /kg; s 0 is the entropy value corresponding to ambient temperature and ambient pressure, kJ/(kg ⁇ K); u(P s,i ,T s,i ) is the working fluid pressure P s,i and the working fluid temperature T s, i calculated working fluid thermodynamic energy, kJ; s(P s,i ,T s,i ) is the working fluid pressure P s,i and working fluid temperature T s,i calculated working fluid entropy, kJ /(kg ⁇ K); C m is the specific heat capacity of the metal heating surface
  • the boiler system is composed of many thermal equipment, so the total storage of the boiler system The amount Ex is stored in each thermal equipment Sum of amount:
  • Ex is the total storage of the boiler Quantity
  • n is the total quantity of thermal equipment in the boiler system
  • the steady state storage of the boiler system is obtained.
  • ⁇ B is the feedforward control signal inputted by the coal feed
  • ⁇ is the conversion coefficient
  • the feedforward control signal ⁇ B inputted by the coal feed amount is superimposed on the uncorrected boiler coal feed amount command B, and finally generated based on the boiler storage Modified boiler feed coal quantity signal B′:
  • the conversion coefficient ⁇ is a positive number, and the feedforward control signal realizes the action of accelerating coal filling, ensuring that the steam parameters of the unit are maintained at a high level, and improving the economy of the unit; during the load reduction process, the steady state storage of the boiler system Less than the accumulation of real-time operating load point Therefore, the conversion coefficient ⁇ is a negative number, and the feed-forward signal realizes the slowing down of the coal adding action, ensuring that the equipment and outlet steam parameters of the unit will not be over-temperature, and improving the safety of the unit.
  • the present invention has the following advantages:
  • the present invention is based on the second law of thermodynamics, starting from the essential point of energy transfer, real-time tracking of the storage of coal-fired unit boiler system Quantify the accumulation of steady-state and transient The amount of change is introduced into the feedforward control of the boiler coal feed to ensure the flexibility of the unit's rapid load change, and effectively improve the economy and safety of the system.
  • the present invention is simple to implement, does not require additional equipment, has low investment, and has an extremely short recovery period.
  • Figure 1 is the transient variable load water-to-coal ratio control logic of the boiler feed coal heat storage correction.
  • Figure 2 shows the steady state storage of the boiler during the load increase process With real-time storage Trend.
  • Figure 3 shows the steady state storage of the boiler during load reduction With real-time storage Trend.
  • the main control purpose of the existing coal-fired unit boiler part is to participate in the coordinated control of the unit and ensure the stability of steam parameters.
  • the water-to-coal ratio is an important control parameter, which can be realized through water-to-coal control and coal-to-water control.
  • the invention corrects the coal and water control logic.
  • the water supply command is first determined according to the boiler master control command and the load fluctuation.
  • the basic command is also generated based on the boiler master control command and the load fluctuation.
  • the water-to-coal ratio is corrected according to the enthalpy difference of the intermediate point to ensure the taste and stability of the boiler outlet parameters.
  • Process 1 During each steady-state operation, the temperature and pressure data of each thermal equipment are measured according to the temperature and pressure measurement points , Transfer the data to f 4 (x);
  • Process 2 Calculate the accumulation of each steady-state load point in f 4 (x) In the process of transient load change, according to the real-time temperature and pressure measurement points to obtain the temperature and pressure data of each thermal equipment, the data will be transferred to the comparator in real time.
  • Process 4 Calculate in f 5 (x) to obtain the storage under real-time operating conditions And transfer the data to the comparator in real time;
  • Process 5 In the comparator, the storage under real-time operating conditions And the corresponding steady-state load point Calculate the difference to get real-time storage Change the amount and pass the data to f 6 (x);
  • process 6 store the data in f 6 (x) The amount of change is transformed into a feedforward control command for boiler coal and water, and finally superimposed on the total coal feed command.
  • Figure 2 illustrates that the steady state storage of the boiler at each load point during the load increase process Than real-time storage The quantity is large, and the feedforward signal is realized through the method of the present invention to accelerate the action of adding coal, so as to ensure that the output steam parameter of the unit is maintained at a higher level, and the economy of the unit is improved.
  • FIG 3 illustrates that the steady state storage of the boiler at each load point during load reduction Than real-time storage It is small, the feedforward signal is realized through the method of the present invention to slow down the action of adding coal, to ensure that the equipment and outlet steam parameters of the unit will not be over-temperature, and the safety of the unit is improved.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
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  • General Engineering & Computer Science (AREA)
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  • Health & Medical Sciences (AREA)
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Abstract

本发明公开了一种计及燃煤锅炉蓄㶲修正的瞬态变负荷给煤量控制方法，通过实时对燃煤机组锅炉系统的工质和金属受热面的温度和压力进行测量和记录，并换算成不同运行负荷点的蓄㶲量；在瞬态运行过程中，将锅炉系统的实时蓄㶲量与对应稳态负荷点的蓄㶲量进行对比，得到实时蓄㶲变化量，进而将给煤量输入的前馈控制信号叠加到现有锅炉给煤量指令中，最终产生基于锅炉蓄㶲修正的锅炉给煤量信号。本发明方法利用瞬态过程锅炉部分蓄㶲偏差对锅炉入口的给煤量进行前馈修正，从而实现对入口煤量的动态精准控制，保证各热力设备参数稳定，削弱热惯性和延时的作用，从而在兼顾经济性和安全性的基础上大幅度地提高燃煤发电机组瞬态过程的运行灵活性。

Description

一种计及燃煤锅炉蓄㶲修正的瞬态变负荷给煤量控制方法 技术领域
本发明属于火电厂热工控制技术领域，具体涉及一种计及燃煤锅炉蓄
Figure PCTCN2019092431-appb-000002
修正的瞬态变负荷给煤量控制方法。
背景技术
当前我国的电力系统结构中，可再生能源发电装机容量已达到总发电装机容量的三分之一以上，其中风电、太阳能发电装机总量均居世界首位。但是，由于风能、太阳能等间歇性能源大规模的并网发电，加剧了电网的波动，同时降低了电网系统的调峰容量比，造成我国可再生能源发电消纳困难，部分地区弃风、弃光问题严重。为有效消纳可再生能源发电，需要以燃煤为主的化石能源电站，提高变负荷的幅度与速率，即提升运行灵活性。然而，燃煤发电机组在频繁变负荷过程中，由于锅炉部分存在非线性、大惯性、大时滞的问题，一方面，如果锅炉部分的储热不能有效释放，会造成重要金属受热面的超温，对机组安全性产生影响，且多加入的煤量导致经济性较差；另一方面，如果锅炉部分的储热不能有效存储，必然会导致参数品味不高，经济性较差。因此，如何实现燃煤电站热力系统中能量的高效、安全和灵活转化成为制约我国电力行业进一步低碳化、清洁化发展的瓶颈问题。
发明内容
本发明正是着眼于燃煤机组参与运行灵活性调节的瞬态变负荷过程，对现有燃煤机组的锅炉水煤比控制策略进行修正，力求从瞬态变负荷中储热充放的本质-蓄
Figure PCTCN2019092431-appb-000003
出发，解决燃煤机组遇到的灵活、安全和经济性相矛盾的问题；提供一种计及燃煤锅炉蓄
Figure PCTCN2019092431-appb-000004
修正的瞬态变负荷给煤量控制方法，该方法可以根据锅炉系统稳态和变负荷瞬态过程的蓄
Figure PCTCN2019092431-appb-000005
变化量，对锅炉入口的给煤量进行前馈调节，从而实现对入口煤量的动态精准控制，保证各热力设备参数稳定，提高机组出口参数品味，削弱储热惯性和延时的作用，从而大幅度提升 系统经济性和安全性；
本发明解决其技术问题采用的技术方案是：
一种计及燃煤锅炉蓄
Figure PCTCN2019092431-appb-000006
修正的瞬态变负荷给煤量控制方法，根据稳态和瞬态变负荷过程燃煤机组锅炉系统的蓄
Figure PCTCN2019092431-appb-000007
变化量，作为锅炉主汽温控制的前馈信号，来修正瞬态变负荷过程中的锅炉给煤量；具体步骤如下：
(一)获取燃煤机组锅炉系统各设备的蓄
Figure PCTCN2019092431-appb-000008
量
对于编号i的锅炉过热器，通过压力传感器获得锅炉过热器i内工质的压力P s,i，通过温度传感器得到锅炉过热器i的工质温度T s,i和金属受热面的温度T w,i，进而查水和蒸汽性质计算表即能够求取锅炉过热器i在当前状态的总蓄
Figure PCTCN2019092431-appb-000009
量Ex i，总蓄
Figure PCTCN2019092431-appb-000010
值Ex i包含工质和金属受热面两部分蓄
Figure PCTCN2019092431-appb-000011
量：
Ex i＝Ex s,i+Ex m,i
Ex s,i＝M s·[u(P s,i,T s,i)-u 0-T 0·(s(P s,i,T s,i)-s 0)]
Ex m,i＝M m·C m[T m,i-T 0-T 0·ln(T m,i/T 0)]
式中：Ex s,i和Ex m,i分别为锅炉过热器i内的工质和金属受热面的蓄
Figure PCTCN2019092431-appb-000012
量，kJ；M s和M m分别为过热器i内的工质和金属受热面的质量，kg；T 0为环境温度，K；u 0为环境温度、环境压力对应下的焓值，kJ/kg；s 0为环境温度、环境压力对应下的熵值，kJ/(kg·K)；u(P s,i,T s,i)为工质压力P s,i和工质温度T s,i计算得到的工质热力学能，kJ；s(P s,i,T s,i)为工质压力P s,i和工质温度T s,i计算得到的工质熵值，kJ/(kg·K)；C m为过热器i金属受热面的比热容，kJ/(kg·K)；T m,i为过热器i金属受热面的平均温度，K；
锅炉系统是由众多热力设备组成，故锅炉系统总蓄
Figure PCTCN2019092431-appb-000013
量Ex为各个热力设备中蓄
Figure PCTCN2019092431-appb-000014
量之和：
Figure PCTCN2019092431-appb-000015
式中：Ex为锅炉总蓄
Figure PCTCN2019092431-appb-000016
量；n为锅炉系统热力设备总数量；
(二)获得燃煤机组锅炉系统瞬态变负荷过程实时蓄
Figure PCTCN2019092431-appb-000017
变化量
首先，根据锅炉系统在各个稳态负荷点运行时，各个热力设备温度、压 力数据，获得锅炉系统的稳态蓄
Figure PCTCN2019092431-appb-000018
量Ex 0；而在燃煤机组瞬态运行过程中，根据实时测量得到的各个热力设备温度和压力数据，获得锅炉系统实时蓄
Figure PCTCN2019092431-appb-000019
量Ex 1，则在比较器中即能够获得锅炉系统实时蓄
Figure PCTCN2019092431-appb-000020
变化量ΔEx：
ΔEx＝Ex 0-Ex 1
(三)产生基于锅炉蓄
Figure PCTCN2019092431-appb-000021
变化量的前馈控制信号
根据计算得到的锅炉系统实时蓄
Figure PCTCN2019092431-appb-000022
变化量ΔEx，获得给煤量输入的前馈控制信号：
ΔB＝ΔEx·ξ
式中：ΔB为给煤量输入的前馈控制信号；ξ为转换系数；
(四)对变负荷过程中的锅炉给煤量进行修正
将给煤量输入的前馈控制信号ΔB，叠加到未进行修正的锅炉给煤量指令B中，最终产生基于锅炉蓄
Figure PCTCN2019092431-appb-000023
修正的锅炉给煤量信号B′：
B′＝B+ΔB。
优选的，升负荷过程中，锅炉系统的稳态蓄
Figure PCTCN2019092431-appb-000024
量大于实时运行负荷点的蓄
Figure PCTCN2019092431-appb-000025
量，故转换系数ξ为正数，前馈控制信号实现加速加煤的动作，保证机组出口蒸汽参数维持在较高水平，提高了机组的经济性；降负荷过程中，锅炉系统的稳态蓄
Figure PCTCN2019092431-appb-000026
量小于实时运行负荷点的蓄
Figure PCTCN2019092431-appb-000027
量，故转换系数ξ为负数，前馈信号实现减缓加煤的动作，保证机组各设备和出口蒸汽参数不至于超温，提高了机组的安全性。
和现有技术相比较，本发明具有如下优点：
1、本发明基于热力学第二定律，从能量传递的本质角度出发，实时跟踪燃煤机组锅炉系统的蓄
Figure PCTCN2019092431-appb-000028
量，将稳态和瞬态过程的蓄
Figure PCTCN2019092431-appb-000029
变化量引入到了锅炉给煤的前馈控制中，保证机组快速变负荷灵活性的基础上，有效提升系统经济性和安全性。
2、本发明实现简单，无需增加额外设备，投资低，回收周期极短。
附图说明
图1为锅炉给煤蓄热修正的瞬态变负荷水煤比控制逻辑。
图2为升负荷过程中锅炉稳态蓄
Figure PCTCN2019092431-appb-000030
与实时蓄
Figure PCTCN2019092431-appb-000031
变化趋势。
图3为降负荷过程中锅炉稳态蓄
Figure PCTCN2019092431-appb-000032
与实时蓄
Figure PCTCN2019092431-appb-000033
变化趋势。
具体实施方式
下面结合附图和实施例对本发明进一步说明。
现有燃煤机组锅炉部分主要控制的目的是参与机组协调控制且保证蒸汽参数稳定。而其中水煤比是重要的控制参数，具体可通过水跟煤控制和煤跟水控制来实现。本发明对煤跟水控制逻辑进行校正。在瞬态变负荷过程中，现有的控制系统中，根据锅炉主控指令和负荷变动量首先确定给水量指令，而对于给煤量指令，首先也是根据锅炉主控指令和负荷变动量生成基本控制信号，之后根据中间点焓值差异来校正水煤比，保证锅炉出口参数的品味和稳定。
但是由于锅炉系统庞大，热力设备众多，在瞬态过程中储热的释放和存储均是大惯性超延时环节，单纯的依靠负荷指令来控制，容易造成参数品味不足或严重超温。同时，锅炉部分的储热中只有部分蓄
Figure PCTCN2019092431-appb-000034
量才能真正提高蒸汽参数，并最终转化为机组做功能力。所以，考虑锅炉系统在瞬态和稳态过程中的蓄
Figure PCTCN2019092431-appb-000035
变化量，从而将这部分蓄
Figure PCTCN2019092431-appb-000036
变化量作为前馈信号反映到基本煤跟水控制策略中，具体引入的控制逻辑包括，过程1：在各稳态运行过程中，根据温度和压力测点测量得到各热力设备的温度和压力数据，将数据传递给f 4(x)；过程2：在f 4(x)中计算得到各稳态负荷点的蓄
Figure PCTCN2019092431-appb-000037
量，拟合成函数或支撑表格形式，并将数据实时传递给比较器；过程3：在瞬态变负荷过程中，根据实时温度和压力测点测量得到各热力设备的温度和压力数据，将数据传递给f 5(x)；过程4：在f 5(x)中计算得到实时运行工况下的蓄
Figure PCTCN2019092431-appb-000038
量，并将数据实时传递给比较器；过程5：在比较器中将实时运行工况下的蓄
Figure PCTCN2019092431-appb-000039
量与对应稳态负荷点的蓄
Figure PCTCN2019092431-appb-000040
量作差计算得到实时蓄
Figure PCTCN2019092431-appb-000041
变化量，并将该数据传递给f 6(x)；过程6：在f 6(x)中将蓄
Figure PCTCN2019092431-appb-000042
变化量转化为锅炉煤跟水的前馈控制指令，最后叠加 到总的给煤量指令中。
图2说明，升负荷过程中各负荷点的锅炉稳态蓄
Figure PCTCN2019092431-appb-000043
要比实时蓄
Figure PCTCN2019092431-appb-000044
量大，经过本发明方法将前馈信号实现加速加煤的动作，保证机组出口蒸汽参数维持在较高水平，提高了机组的经济性。
图3说明，降负荷过程中各负荷点的锅炉稳态蓄
Figure PCTCN2019092431-appb-000045
要比实时蓄
Figure PCTCN2019092431-appb-000046
小，经过本发明方法将前馈信号实现减缓加煤的动作，保证机组各设备和出口蒸汽参数不至于超温，提高了机组的安全性。

Claims (2)

  1. 一种计及燃煤锅炉蓄
    Figure PCTCN2019092431-appb-100001
    修正的瞬态变负荷给煤量控制方法，其特征在于，根据稳态和瞬态变负荷过程燃煤机组锅炉系统的蓄
    Figure PCTCN2019092431-appb-100002
    变化量，作为锅炉主汽温控制的前馈信号，来修正瞬态变负荷过程中的锅炉给煤量；具体步骤如下：
    (一)获取燃煤机组锅炉系统各设备的蓄
    Figure PCTCN2019092431-appb-100003
    量
    对于编号i的锅炉过热器，通过压力传感器获得锅炉过热器i内工质的压力P s,i，通过温度传感器得到锅炉过热器i的工质温度T s,i和金属受热面的温度T w,i，进而查水和蒸汽性质计算表即能够求取锅炉过热器i在当前状态的总蓄
    Figure PCTCN2019092431-appb-100004
    量Ex i，总蓄
    Figure PCTCN2019092431-appb-100005
    值Ex i包含工质和金属受热面两部分蓄
    Figure PCTCN2019092431-appb-100006
    量：
    Ex i＝Ex s,i+Ex m,i
    Ex s,i＝M s·[u(P s,i,T s,i)-u 0-T 0·(s(P s,i,T s,i)-s 0)]
    Ex m,i＝M m·C m[T m,i-T 0-T 0·ln(T m,i/T 0)]
    式中：Ex s,i和Ex m,i分别为锅炉过热器i内的工质和金属受热面的蓄
    Figure PCTCN2019092431-appb-100007
    量，kJ；M s和M m分别为过热器i内的工质和金属受热面的质量，kg；T 0为环境温度，K；u 0为环境温度、环境压力对应下的焓值，kJ/kg；s 0为环境温度、环境压力对应下的熵值，kJ/(kg·K)；u(P s,i,T s,i)为工质压力P s,i和工质温度T s,i计算得到的工质热力学能，kJ；s(P s,i,T s,i)为工质压力P s,i和工质温度T s,i计算得到的工质熵值，kJ/(kg·K)；C m为过热器i金属受热面的比热容，kJ/(kg·K)；T m,i为过热器i金属受热面的平均温度，K；
    锅炉系统是由众多热力设备组成，故锅炉系统总蓄
    Figure PCTCN2019092431-appb-100008
    量Ex为各个热力设备中蓄
    Figure PCTCN2019092431-appb-100009
    量之和：
    Figure PCTCN2019092431-appb-100010
    式中：Ex为锅炉总蓄
    Figure PCTCN2019092431-appb-100011
    量；n为锅炉系统热力设备总数量；
    (二)获得燃煤机组锅炉系统瞬态变负荷过程实时蓄
    Figure PCTCN2019092431-appb-100012
    变化量
    首先，根据锅炉系统在各个稳态负荷点运行时，各个热力设备温度、压力数据，获得锅炉系统的稳态蓄
    Figure PCTCN2019092431-appb-100013
    量Ex 0；而在燃煤机组瞬态运行过程中，根据实时测量得到的各个热力设备温度和压力数据，获得锅炉系统实时蓄
    Figure PCTCN2019092431-appb-100014
    量Ex 1，则在比较器中即能够获得锅炉系统实时蓄
    Figure PCTCN2019092431-appb-100015
    变化量ΔEx：
    ΔEx＝Ex 0-Ex 1
    (三)产生基于锅炉蓄
    Figure PCTCN2019092431-appb-100016
    变化量的前馈控制信号
    根据计算得到的锅炉系统实时蓄
    Figure PCTCN2019092431-appb-100017
    变化量ΔEx，获得给煤量输入的前馈控制信号：
    ΔB＝ΔEx·ξ
    式中：ΔB为给煤量输入的前馈控制信号；ξ为转换系数；
    (四)对变负荷过程中的锅炉给煤量进行修正
    将给煤量输入的前馈控制信号ΔB，叠加到未进行修正的锅炉给煤量指令B中，最终产生基于锅炉蓄
    Figure PCTCN2019092431-appb-100018
    修正的锅炉给煤量信号B′：
    B′＝B+ΔB。
  2. 根据权利要求1所述的一种计及燃煤锅炉蓄
    Figure PCTCN2019092431-appb-100019
    修正的瞬态变负荷给煤量控制方法，其特征在于，升负荷过程中，锅炉系统的稳态蓄
    Figure PCTCN2019092431-appb-100020
    量大于实时运行负荷点的蓄
    Figure PCTCN2019092431-appb-100021
    量，故转换系数ξ为正数，前馈控制信号实现加速加煤的动作，保证机组出口蒸汽参数维持在较高水平，提高了机组的经济性；降负荷过程中，锅炉系统的稳态蓄
    Figure PCTCN2019092431-appb-100022
    量小于实时运行负荷点的蓄
    Figure PCTCN2019092431-appb-100023
    量，故转换系数ξ为负数，前馈信号实现减缓加煤的动作，保证机组各设备和出口蒸汽参数不至于超温，提高了机组的安全性。
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