WO2019114402A1 - Variable load steam pressure tracking control method for straw direct-fired circulating fluidized bed boiler - Google Patents
Variable load steam pressure tracking control method for straw direct-fired circulating fluidized bed boiler Download PDFInfo
- Publication number
- WO2019114402A1 WO2019114402A1 PCT/CN2018/110347 CN2018110347W WO2019114402A1 WO 2019114402 A1 WO2019114402 A1 WO 2019114402A1 CN 2018110347 W CN2018110347 W CN 2018110347W WO 2019114402 A1 WO2019114402 A1 WO 2019114402A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fluidized bed
- bed boiler
- circulating fluidized
- straw
- direct
- Prior art date
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/002—Regulating fuel supply using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2223/00—Signal processing; Details thereof
- F23N2223/10—Correlation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2223/00—Signal processing; Details thereof
- F23N2223/34—Signal processing; Details thereof with feedforward processing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2241/00—Applications
- F23N2241/10—Generating vapour
Definitions
- the invention belongs to the field of automatic control of straw direct-fired circulating fluidized bed boiler, and relates to a variable load steam pressure tracking control method for straw direct-fired circulating fluidized bed boiler.
- Straw is a highly efficient and renewable renewable fuel that can replace coal, oil and natural gas to produce electricity, not only reduce human dependence on fossil energy, but also protect national energy resources.
- Europe and the United States have established a relatively complete straw-type agricultural waste burning power plant, which proves that straw direct-fired power generation and heating have significant energy and environmental benefits, and recycling of waste straw increases farmers' income and economically guarantees that farmers no longer Stir the straw.
- straws of different varieties and origins have different proportions of fixed carbon, volatile matter, moisture, ash, etc., plus the effects of pretreatment and local climate during recycling, resulting in straw fuel. The quality varies greatly.
- the current circulating fluidized bed straw burning technology is developing rapidly in China.
- the change of the steam pressure of the fluidized bed boiler represents the steam output of the boiler and the fluctuation characteristics of the steam consumption of the load.
- the supply of straw fuel must be changed accordingly, so that the change of steam pressure of the circulating fluidized bed boiler can meet the steam output of the fluidized bed boiler and track the change of steam consumption in time.
- the combustion steam pressure control of the circulating fluidized bed boiler is related to the turbine load control.
- the task of the boiler steam pressure control system is to adjust the boiler fuel amount in time to make the straw direct combustion circulating fluidized bed.
- the steam output of the boiler is adapted to the energy input required by the turbine for external load demand.
- the mark is the steady change of the steam pressure of the straw direct-fired circulating fluidized bed boiler and the rapid change of the demand for steam consumption of the variable load.
- Variable load steam pressure tracking control method for direct-fired circulating fluidized bed boiler variable load steam pressure tracking control method for straw direct-fired circulating fluidized bed boiler based on fuzzy control technology, and straw direct-fired circulating fluidized bed boiler based on neural network control technology
- Variable load steam pressure tracking control method but the conventional PID tracking control of steam pressure is determined offline because the controller parameters are determined offline, and will not change with the change of straw fuel quality and load consumption, so it is not able to track the steam consumption due to load.
- the corresponding target value of the steam pressure is changed; also because of the large difference in the quality of the straw fuel, a large amount of ambiguity function is required, so that the calculation method of the tracking pressure control method of the variable-load vapor pressure of the circulating fluidized bed boiler is large; and based on the neural network Control technology of straw direct-fired circulating fluidized bed boiler variable load vapor pressure tracking control
- the law requires a large number of industrial data samples for offline training of straw direct combustion process model parameters to ensure a more accurate relationship between steam pressure and straw fuel volume.
- These straw direct-fired circulating fluidized bed boilers are subjected to variable load steam pressure tracking.
- the control method has a slow convergence rate for the steam regulation effect of the frequent fluctuation of straw fuel quality, understanding abstraction, and the application process is complicated.
- variable load vapor pressure tracking control method for circulating fluidized bed boilers.
- a variable load steam pressure tracking control method for a straw direct-fired circulating fluidized bed boiler comprising the following steps:
- t represents a time variable
- x 1 represents the vapor pressure of the circulating fluidized bed boiler, MPa
- x 2 represents the rate of change of the vapor pressure of the circulating fluidized bed boiler
- x 3 represents the variable acceleration of the vapor pressure of the circulating fluidized bed boiler
- M represents the amount of straw fuel used for combustion, t/h
- G represents the steady-state gain of the vapor pressure of the circulating fluidized bed boiler
- the constants T 1 , T 2 and ⁇ represent the cycle respectively Fluidized bed boiler drum pressure time constant, vapor pressure time constant and time lag, s;
- the column vector z [x 1 , x 2 , x 3 , q] T , the superscript T represents vector transposition; the matrices A, B and C are respectively
- the matrix W is a positive definite symmetric matrix, calculated by the MatLab function care, see equation (6):
- the matrix I 4 is a fourth-order unit matrix
- the technical idea of the invention is to establish a continuous time dynamic of the steam pressure and the straw burning amount of the straw direct-fired circulating fluidized bed boiler for the control problem of the actual vapor pressure tracking target value in the variable load of the straw direct-fired circulating fluidized bed boiler.
- the model defines the integral amount of the tracking deviation according to the target value of the vapor pressure, and then establishes the continuous time expansion dynamic model of the steam pressure and the straw burning amount of the straw direct-fired circulating fluidized bed boiler, and designs a straw direct combustion using the calculation result of the MatLab function care.
- the variable-load steam pressure automatic tracking controller of circulating fluidized bed boiler realizes the automatic tracking control of the variable load vapor pressure of the straw direct-fired circulating fluidized bed boiler to the target value.
- the main execution part of the invention is implemented on a circulating fluidized bed boiler control computer.
- the application process of this method can be roughly divided into three stages:
- Parameter setting including model parameters and tracking controller parameters: In the model import interface, input the values of constants G, T 1 , T 2 and ⁇ in model (1); in the tracking controller parameter setting interface, input The controller parameter ⁇ >0; after the input parameter is confirmed, the control computer sends the setting data to the computer storage unit RAM for storage;
- Off-line debugging Click the “Debug” button in the configuration interface, and the control system enters the tracking controller debugging stage.
- the unit step response of the steam pressure of the straw direct-fired circulating fluidized bed boiler is used as the test experiment, and the configuration interface is adjusted.
- the parameter ⁇ is used to observe the control effect of the steam pressure and the straw burning amount of the straw direct-fired circulating fluidized bed boiler, thereby determining a parameter that can achieve the variable load vapor pressure tracking control of the straw direct-fired circulating fluidized bed boiler;
- the parameter ⁇ Value rule: ⁇ is a positive real number;
- the adjustment rule of parameter ⁇ : increasing the value of ⁇ will shorten the tracking adjustment time of the steam pressure response of the straw direct-fired circulating fluidized bed boiler, but increase the burning amount of straw; on the contrary, reduce ⁇
- the value will smooth the steam pressure response and straw burning of the straw direct-fired circulating fluidized bed boiler, but extend the tracking adjustment time of the vapor pressure response of the circulating fluidized bed boiler. Therefore, when the actual debugging parameter ⁇ is used, the straw direct combustion circulating flow should be weighed. The comprehensive performance between the overpressure of the vapor pressure response of the chemical bed boiler, the tracking adjustment time, the damping effect and the burning amount of the straw;
- variable load steam pressure tracking control method of the straw direct-fired circulating fluidized bed boiler has only one design parameter, and the design is simple, easy to understand, simple to implement on the line, and practical;
- Straw straight When the steam pressure of the circulating fluidized bed boiler deviates from the target value under variable load, the calculation and adjustment control of the straw burning amount can be automatically realized, so that it can be applied to more complicated and varied variable load conditions to meet the straw direct combustion circulating fluidized bed boiler.
- the arching of fast load steam consumption demand improves the control level of the combustion system of straw direct-fired circulating fluidized bed boiler.
- Figure 1 is the real-time curve of steam pressure tracking of straw direct-fired circulating fluidized bed boiler.
- the dotted line is the real-time curve of steam pressure target value of straw direct-fired circulating fluidized bed boiler.
- the solid line is the real-time steam pressure of straw direct-fired circulating fluidized bed boiler. Response curve.
- Figure 2 is a real-time curve of straw burning in a straw direct-fired circulating fluidized bed boiler.
- variable load steam pressure tracking control method for a straw direct-fired circulating fluidized bed boiler, the method comprising the following steps:
- t represents a time variable
- x 1 represents the vapor pressure of the circulating fluidized bed boiler, MPa
- x 2 represents the rate of change of the vapor pressure of the circulating fluidized bed boiler
- x 3 represents the variable acceleration of the vapor pressure of the circulating fluidized bed boiler
- M represents the amount of straw fuel used for combustion, t/h
- G represents the steady-state gain of the vapor pressure of the circulating fluidized bed boiler
- the constants T 1 , T 2 and ⁇ represent the cycle respectively Fluidized bed boiler drum pressure time constant, vapor pressure time constant and time lag, s;
- the column vector z [x 1 , x 2 , x 3 , q] T , the superscript T represents vector transposition; the matrices A, B and C are respectively
- the matrix W is a positive definite symmetric matrix, calculated by the MatLab function care, see equation (6):
- the matrix I 4 is a fourth-order unit matrix
- next control cycle re-measure the actual value and target value of the vapor pressure of the circulating fluidized bed boiler, calculate the straw burning amount of the circulating fluidized bed boiler according to formula (5), and automatically control the combustion system of the circulating fluidized bed boiler.
- the amount of straw burning into the circulating fluidized bed boiler is adjusted in real time, so that the automatic tracking control of the variable load vapor pressure of the straw direct-fired circulating fluidized bed boiler to the target value P r is realized.
- This embodiment is a variable load steam pressure tracking control process for a straw direct-fired circulating fluidized bed boiler.
- the specific operations are as follows:
- Figure 1 shows the real-time curve of the vapor pressure tracking of the straw direct-fired circulating fluidized bed boiler.
- the dotted line shows the real-time curve of the vapor pressure target value of the straw direct-fired circulating fluidized bed boiler.
- the line is the steam pressure real-time response curve of the straw direct-fired circulating fluidized bed boiler;
- Figure 2 is the real-time curve of the straw burning amount of the straw direct-fired circulating fluidized bed boiler.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
A variable load steam pressure tracking control method for a straw direct-fired circulating fluidized bed boiler. The method comprises: defining an integration variable of a tracking error according to a steam pressure target value so as to establish a continuous time expansion dynamic model of a steam pressure of a straw direct-fired circulating fluidized bed boiler, and the straw burning amount; and designing, according to the care calculation result of an MatLab function, an automatic variable load steam pressure track controller of the straw direct-fired circulating fluidized bed boiler so as to carry out automatic variable load steam pressure track and control of the straw direct-fired circulating fluidized bed boiler on the target value. The control method improves the control level for running a straw direct-fired circulating fluidized bed boiler combustion system.
Description
本发明属于秸秆直燃循环流化床锅炉自动控制领域，涉及一种秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制方法。The invention belongs to the field of automatic control of straw direct-fired circulating fluidized bed boiler, and relates to a variable load steam pressure tracking control method for straw direct-fired circulating fluidized bed boiler.
秸秆是一种高效可利用的可再生清洁燃料，可以替代煤炭、石油和天然气等矿物质燃料产生电力，不仅减少人类对矿物能源的依赖，保护国家能源资源，而且严格实现秸秆的高效燃烧是降低我国PM2.5浓度的重要手段，减轻能源消费给环境造成的污染。目前欧美国家建立了较为完善的秸秆类农业废弃物燃烧发电厂，证明秸秆直燃发电、供热具有显著的能源效益和环境效益，而且回收废弃秸秆增加了农民收入，从经济上保证农民不再乱烧秸秆。不同于煤炭、石油和天然气等矿物质燃料，不同品种和产地的秸秆具有不同固定碳、挥发份、水分、灰分等成分比例，加上回收时预处理手段和当地气候的影响，造成了秸秆燃料品质的差异很大。由于循环流化床锅炉对燃料品质的适应性较好，目前循环流化床秸秆燃烧技术在我国发展十分迅速。在循环流化床秸秆燃烧过程中，流化床锅炉蒸汽压力的变化表示锅炉的蒸汽产量和负荷的耗汽量波动特性。当负荷耗汽量需求发生变化时，必须相应地改变秸秆燃料的供应量，使得循环流化床锅炉蒸汽压力的变化能满足流化床锅炉的蒸汽产量能及时跟踪负荷耗汽量的变化。在秸秆直燃发电单元机组中，循环流化床锅炉燃烧蒸汽压力控制与汽机负荷控制是相互关联的，锅炉的蒸汽压力控制***的任务就是及时调整锅炉燃料量，使秸秆直燃循环流化床锅炉的蒸汽量输出与汽轮机对外界负荷需求而需要的能量输入相适应，其标志是秸秆直燃循环流化床锅炉蒸汽压力的平稳、快速跟踪变负荷耗汽量的需求变化。通过对现有秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制方法的文献的检索发现，目前秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制方法主要有：基于常规PID技术的秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制方法、基于模糊控制技术的秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制方法和基于神经网络控制技术的秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制方法，但蒸汽压力的常规 PID跟踪控制由于控制器参数是离线确定，不会随秸秆燃料品质和负荷耗汽量变化而改变，因此不能很好的跟踪由于负荷耗汽量改变的对应的蒸汽压力目标值；同样由于秸秆燃料品质的差异大，需要采用大量的模糊度函数，使得环流化床锅炉变负荷蒸汽压的跟踪控制方法的计算量较大；而基于神经网络控制技术的秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制方法则需要大量的工业数据样本用于离线训练秸秆直燃过程模型参数，以保证得到较为准确的蒸汽压力与秸秆燃料量之间的动态关系，这些秸秆直燃循环流化床锅炉变负荷蒸汽压力跟踪控制方法对于秸秆燃料频繁波动的品质的蒸汽调节效果的收敛速度缓慢，理解抽象，而且应用过程复杂。因为秸秆燃料品质的频繁波动以及用户需求的周期变化，但循环流化床锅炉蒸汽压力跟踪控制的实时性、快速性和准确性要求高，因此，尽管秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制方法研究取得了一些成果，但近年来相关学者对于这个具有挑战性的重要难题仍然进行了大量地研究和探讨，以满足秸秆直燃发电、供热过程对高品质的循环流化床秸秆直燃控制技术的迫切需要。Straw is a highly efficient and renewable renewable fuel that can replace coal, oil and natural gas to produce electricity, not only reduce human dependence on fossil energy, but also protect national energy resources. An important means of PM2.5 concentration in China to reduce the pollution caused by energy consumption to the environment. At present, Europe and the United States have established a relatively complete straw-type agricultural waste burning power plant, which proves that straw direct-fired power generation and heating have significant energy and environmental benefits, and recycling of waste straw increases farmers' income and economically guarantees that farmers no longer Stir the straw. Unlike mineral fuels such as coal, oil and natural gas, straws of different varieties and origins have different proportions of fixed carbon, volatile matter, moisture, ash, etc., plus the effects of pretreatment and local climate during recycling, resulting in straw fuel. The quality varies greatly. Due to the better adaptability of circulating fluidized bed boilers to fuel quality, the current circulating fluidized bed straw burning technology is developing rapidly in China. In the circulating fluidized bed straw burning process, the change of the steam pressure of the fluidized bed boiler represents the steam output of the boiler and the fluctuation characteristics of the steam consumption of the load. When the demand for steam consumption of the load changes, the supply of straw fuel must be changed accordingly, so that the change of steam pressure of the circulating fluidized bed boiler can meet the steam output of the fluidized bed boiler and track the change of steam consumption in time. In the straw direct-fired power generation unit, the combustion steam pressure control of the circulating fluidized bed boiler is related to the turbine load control. The task of the boiler steam pressure control system is to adjust the boiler fuel amount in time to make the straw direct combustion circulating fluidized bed. The steam output of the boiler is adapted to the energy input required by the turbine for external load demand. The mark is the steady change of the steam pressure of the straw direct-fired circulating fluidized bed boiler and the rapid change of the demand for steam consumption of the variable load. Through the search of the literature on the variable load vapor pressure tracking control method of the existing straw direct-fired circulating fluidized bed boiler, the current variable load steam pressure tracking control methods for the straw direct-fired circulating fluidized bed boiler mainly include: straw based on conventional PID technology. Variable load steam pressure tracking control method for direct-fired circulating fluidized bed boiler, variable load steam pressure tracking control method for straw direct-fired circulating fluidized bed boiler based on fuzzy control technology, and straw direct-fired circulating fluidized bed boiler based on neural network control technology Variable load steam pressure tracking control method, but the conventional PID tracking control of steam pressure is determined offline because the controller parameters are determined offline, and will not change with the change of straw fuel quality and load consumption, so it is not able to track the steam consumption due to load. The corresponding target value of the steam pressure is changed; also because of the large difference in the quality of the straw fuel, a large amount of ambiguity function is required, so that the calculation method of the tracking pressure control method of the variable-load vapor pressure of the circulating fluidized bed boiler is large; and based on the neural network Control technology of straw direct-fired circulating fluidized bed boiler variable load vapor pressure tracking control The law requires a large number of industrial data samples for offline training of straw direct combustion process model parameters to ensure a more accurate relationship between steam pressure and straw fuel volume. These straw direct-fired circulating fluidized bed boilers are subjected to variable load steam pressure tracking. The control method has a slow convergence rate for the steam regulation effect of the frequent fluctuation of straw fuel quality, understanding abstraction, and the application process is complicated. Because of the frequent fluctuations in the quality of straw fuel and the cyclical changes in user demand, the real-time, rapidity and accuracy of the steam pressure tracking control of circulating fluidized bed boilers are high, therefore, despite the variable load steam of straw direct-fired circulating fluidized bed boilers Some research achievements have been made in the research of pressure tracking control methods. However, in recent years, relevant scholars have carried out extensive research and discussion on this challenging and important problem to meet the high-quality circulating fluidized bed of straw direct combustion power generation and heating process. The urgent need for straw direct combustion control technology.
发明内容Summary of the invention
为了克服现有秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制方法的理解抽象、在线计算复杂和应用过程复杂的不足，本发明提供一种理解直观、设计简单、易于实现的秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制方法。In order to overcome the shortcomings of the existing straw straight-fired circulating fluidized bed boiler variable load vapor pressure tracking control method, the abstract, the online calculation complexity and the complicated application process, the present invention provides an intuitive, simple design and easy to realize straw direct combustion. Variable load steam pressure tracking control method for circulating fluidized bed boilers.
本发明解决其技术问题所采用的技术方案是：The technical solution adopted by the present invention to solve the technical problem thereof is:
一种秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制方法，所述方法包括如下步骤：A variable load steam pressure tracking control method for a straw direct-fired circulating fluidized bed boiler, the method comprising the following steps:
1)、考虑秸秆直燃循环流化床锅炉变负荷蒸汽压与秸秆燃料量的三阶连续时间动态模型，参见式(1)：1) Consider the third-order continuous-time dynamic model of variable load steam pressure and straw fuel amount of straw direct-fired circulating fluidized bed boiler, see equation (1):
其中，t表示时间变量；x
1表示循环流化床锅炉的蒸汽压，MPa；x
2表示循环流化床锅炉蒸汽压的变化速度；x
3表示循环流化床锅炉蒸汽压的变化加速度；“.”表示对应变量的一阶导数；M表示用于燃烧的秸秆燃料量，t/h；常数G表示循环流化床锅炉蒸汽压的稳态增益；常数T
1、T
2和τ分别表示循环流化床锅炉汽包压力时间常数、蒸汽压时间常数和时滞，s；
Wherein t represents a time variable; x 1 represents the vapor pressure of the circulating fluidized bed boiler, MPa; x 2 represents the rate of change of the vapor pressure of the circulating fluidized bed boiler; x 3 represents the variable acceleration of the vapor pressure of the circulating fluidized bed boiler; "represents the first derivative of the corresponding variable; M represents the amount of straw fuel used for combustion, t/h; the constant G represents the steady-state gain of the vapor pressure of the circulating fluidized bed boiler; the constants T 1 , T 2 and τ represent the cycle respectively Fluidized bed boiler drum pressure time constant, vapor pressure time constant and time lag, s;
2)、定义秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪偏差的积分量q(t)，参见式(2)：2) Define the integral amount q(t) of the variable load vapor pressure tracking deviation of the straw direct-fired circulating fluidized bed boiler, see equation (2):
其中，符号s表示积分器内的积分时间变量；P
r表示秸秆直燃循环流化床锅炉蒸汽压的目标值；求积分量q(t)的一阶导数，参见式(3)：
Wherein, the symbol s represents the integral time variable in the integrator; P r represents the target value of the vapor pressure of the straw direct-fired circulating fluidized bed boiler; and the first derivative of the integral quantity q(t) is obtained, see equation (3):
其中，
表示蒸汽压跟踪偏差积分量对时间变量的一阶导数；
among them, Indicates the first derivative of the vapor pressure tracking deviation integral amount versus the time variable;
3)、结合式(1)和式(3)，建立秸秆直燃循环流化床锅炉变负荷蒸汽压与秸秆燃料量的连续时间扩展状态空间模型，参见式(4)：3) Combining equations (1) and (3), establish a continuous time extended state space model of variable load steam pressure and straw fuel quantity of straw direct-fired circulating fluidized bed boiler, see equation (4):
其中，列向量z＝[x
1,x
2,x
3,q]
T，上标T表示向量转置；矩阵A、B和C分别为
Wherein, the column vector z=[x 1 , x 2 , x 3 , q] T , the superscript T represents vector transposition; the matrices A, B and C are respectively
4)、给定一个参数μ>0，设计用于计算秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制***在t时刻的秸秆燃烧量的跟踪控制律，参见式(5)：4), given a parameter μ>0, designed to calculate the tracking control law of straw burning amount at time t of variable load steam pressure tracking control system of straw direct-fired circulating fluidized bed boiler, see formula (5):
M(t)＝-μBWz(t) (5)M(t)=-μBWz(t) (5)
其中，矩阵W为正定对称矩阵，通过MatLab函数care计算，参见式(6)：Among them, the matrix W is a positive definite symmetric matrix, calculated by the MatLab function care, see equation (6):
其中，矩阵I
4为4阶单位矩阵；
Wherein, the matrix I 4 is a fourth-order unit matrix;
5)、在线测量读取秸秆直燃循环流化床锅炉蒸汽压的实际值和目标值，根据式(5)实时计算循环流化床锅炉的秸秆燃烧量，循环流化床锅炉燃烧自动控制***根据秸秆燃烧量的计算结果实时调整进入循环流化床锅炉内的秸秆燃烧量；在下一个控制周期时，重新测量读取循环流化床锅炉蒸汽压的实际值和目标值，根据式(5)实时计算循环流化床锅炉的秸秆燃烧量，循环流化床锅炉燃烧自动控制***根据秸秆燃烧量的计算结果实时调整进入循环流化床锅炉内的秸秆燃烧量，如此周而复始，实现秸秆直燃循环流化床锅炉变负荷蒸汽压对目标值P
r的自动跟踪控制。
5) On-line measurement and reading of the actual value and target value of the steam pressure of the straw direct-fired circulating fluidized bed boiler, calculating the straw burning amount of the circulating fluidized bed boiler according to formula (5), and the automatic control system of the circulating fluidized bed boiler combustion According to the calculation result of straw burning amount, the amount of straw burning into the circulating fluidized bed boiler is adjusted in real time; in the next control cycle, the actual value and the target value of the vapor pressure of the circulating fluidized bed boiler are re-measured, according to formula (5) The straw burning amount of the circulating fluidized bed boiler is calculated in real time, and the automatic control system of the circulating fluidized bed boiler is adjusted in real time according to the calculation result of the burning amount of straw, and the straw burning amount in the circulating fluidized bed boiler is adjusted in real time, so that the straw direct combustion cycle is realized. The automatic tracking control of the variable load vapor pressure of the fluidized bed boiler to the target value P r .
本发明的技术构思是：针对秸秆直燃循环流化床锅炉变负荷中的实际蒸汽压 跟踪目标值的控制问题，建立秸秆直燃循环流化床锅炉的蒸汽压与秸秆燃烧量的连续时间动态模型，根据蒸汽压目标值定义跟踪偏差的积分量，进而建立秸秆直燃循环流化床锅炉蒸汽压与秸秆燃烧量连续时间扩展动态模型，并利用MatLab函数care的计算结果，设计一个秸秆直燃循环流化床锅炉变负荷蒸汽压自动跟踪控制器，实现秸秆直燃循环流化床锅炉变负荷蒸汽压对目标值的自动跟踪控制。The technical idea of the invention is to establish a continuous time dynamic of the steam pressure and the straw burning amount of the straw direct-fired circulating fluidized bed boiler for the control problem of the actual vapor pressure tracking target value in the variable load of the straw direct-fired circulating fluidized bed boiler. The model defines the integral amount of the tracking deviation according to the target value of the vapor pressure, and then establishes the continuous time expansion dynamic model of the steam pressure and the straw burning amount of the straw direct-fired circulating fluidized bed boiler, and designs a straw direct combustion using the calculation result of the MatLab function care. The variable-load steam pressure automatic tracking controller of circulating fluidized bed boiler realizes the automatic tracking control of the variable load vapor pressure of the straw direct-fired circulating fluidized bed boiler to the target value.
本发明主要执行部分在循环流化床锅炉控制计算机上运行实施。本方法应用过程可以大致分为3个阶段：The main execution part of the invention is implemented on a circulating fluidized bed boiler control computer. The application process of this method can be roughly divided into three stages:
1、参数设置：包括模型参数和跟踪控制器参数：在模型导入界面中，输入模型式(1)中常数G、T
1、T
2和τ的值；在跟踪控制器参数设置界面中，输入控制器参数μ>0；输入参数确认后，由控制计算机将设置数据送入计算机存储单元RAM中保存；
1. Parameter setting: including model parameters and tracking controller parameters: In the model import interface, input the values of constants G, T 1 , T 2 and τ in model (1); in the tracking controller parameter setting interface, input The controller parameter μ>0; after the input parameter is confirmed, the control computer sends the setting data to the computer storage unit RAM for storage;
2、离线调试：点击组态界面中的“调试”按钮，控制***进入跟踪控制器调试阶段，以秸秆直燃循环流化床锅炉蒸汽压的单位阶跃响应作为测试实验，调整组态界面中的参数μ，观察秸秆直燃循环流化床锅炉蒸汽压和秸秆燃烧量的控制效果，由此确定一个能良好实现秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制的参数；参数μ的取值规则：μ为正实数；参数μ的调整规则：增大μ的值将缩短秸秆直燃循环流化床锅炉蒸汽压响应的跟踪调整时间，但增大秸秆燃烧量；相反，减小μ的值将平缓秸秆直燃循环流化床锅炉蒸汽压响应和秸秆燃烧量，但延长循环流化床锅炉蒸汽压响应的跟踪调整时间，因此，实际调试参数μ时，应权衡秸秆直燃循环流化床锅炉蒸汽压响应的超调量、跟踪调整时间、阻尼效应和秸秆燃烧量之间的综合性能；2. Off-line debugging: Click the “Debug” button in the configuration interface, and the control system enters the tracking controller debugging stage. The unit step response of the steam pressure of the straw direct-fired circulating fluidized bed boiler is used as the test experiment, and the configuration interface is adjusted. The parameter μ is used to observe the control effect of the steam pressure and the straw burning amount of the straw direct-fired circulating fluidized bed boiler, thereby determining a parameter that can achieve the variable load vapor pressure tracking control of the straw direct-fired circulating fluidized bed boiler; the parameter μ Value rule: μ is a positive real number; the adjustment rule of parameter μ: increasing the value of μ will shorten the tracking adjustment time of the steam pressure response of the straw direct-fired circulating fluidized bed boiler, but increase the burning amount of straw; on the contrary, reduce μ The value will smooth the steam pressure response and straw burning of the straw direct-fired circulating fluidized bed boiler, but extend the tracking adjustment time of the vapor pressure response of the circulating fluidized bed boiler. Therefore, when the actual debugging parameter μ is used, the straw direct combustion circulating flow should be weighed. The comprehensive performance between the overpressure of the vapor pressure response of the chemical bed boiler, the tracking adjustment time, the damping effect and the burning amount of the straw;
3、在线运行：点击组态界面“运行”按钮，启动秸秆直燃循环流化床锅炉燃烧控制计算机的CPU读取循环流化床锅炉蒸汽压模型参数和控制器参数，并执行“秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制程序”，通过在线测量读取秸秆直燃循环流化床锅炉蒸汽压的实际值和目标值，实时计算循环流化床锅炉的秸秆燃烧量，循环流化床锅炉燃烧自动跟踪控制***根据秸秆燃烧量的计算结果实时调整进入流化床锅炉内的秸秆燃烧量，如此周而复始，实现秸秆直燃循环流化床锅炉变负荷蒸汽压对目标值P
r的自动跟踪控制。
3. Online operation: Click the “Run” button on the configuration interface to start the CPU of the straw direct combustion circulating fluidized bed boiler combustion control computer to read the steam pressure model parameters and controller parameters of the circulating fluidized bed boiler, and execute “stalk direct combustion” Circulating fluidized bed boiler variable load vapor pressure tracking control program", online measurement of the actual value and target value of the steam pressure of the straw direct-fired circulating fluidized bed boiler, real-time calculation of the straw burning amount of the circulating fluidized bed boiler, circulating flow The automatic tracking control system of the chemical bed boiler burns the amount of straw burning into the fluidized bed boiler in real time according to the calculation result of the straw burning amount, so as to achieve the variable load vapor pressure of the straw direct combustion circulating fluidized bed boiler to the target value P r Automatic tracking control.
本发明的有益效果主要表现在：1、秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制方法仅有一个设计参数，设计简单、容易理解、在线实施简便、实用性强； 2、秸秆直燃循环流化床锅炉在变负荷下蒸汽压偏离目标值时能自动实现秸秆燃烧量的计算和调整控制，从而可以适用更复杂多样的变负荷工况，满足秸秆直燃循环流化床锅炉对快速负荷耗汽量需求的拱给，提高秸秆直燃循环流化床锅炉燃烧***运行的控制水平。The beneficial effects of the invention are mainly as follows: 1. The variable load steam pressure tracking control method of the straw direct-fired circulating fluidized bed boiler has only one design parameter, and the design is simple, easy to understand, simple to implement on the line, and practical; 2. Straw straight When the steam pressure of the circulating fluidized bed boiler deviates from the target value under variable load, the calculation and adjustment control of the straw burning amount can be automatically realized, so that it can be applied to more complicated and varied variable load conditions to meet the straw direct combustion circulating fluidized bed boiler. The arching of fast load steam consumption demand improves the control level of the combustion system of straw direct-fired circulating fluidized bed boiler.
图1为秸秆直燃循环流化床锅炉蒸汽压跟踪实时曲线，其中，虚线为秸秆直燃循环流化床锅炉蒸汽压目标值实时曲线，实线为秸秆直燃循环流化床锅炉蒸汽压实时响应曲线。Figure 1 is the real-time curve of steam pressure tracking of straw direct-fired circulating fluidized bed boiler. The dotted line is the real-time curve of steam pressure target value of straw direct-fired circulating fluidized bed boiler. The solid line is the real-time steam pressure of straw direct-fired circulating fluidized bed boiler. Response curve.
图2为秸秆直燃循环流化床锅炉的秸秆燃烧量实时曲线。Figure 2 is a real-time curve of straw burning in a straw direct-fired circulating fluidized bed boiler.
下面结合附图对本发明的方法作进一步详细说明。The method of the present invention will be further described in detail below with reference to the accompanying drawings.
参照图1和图2，一种秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制方法，所述方法包括如下步骤：1 and 2, a variable load steam pressure tracking control method for a straw direct-fired circulating fluidized bed boiler, the method comprising the following steps:
1)、考虑秸秆直燃循环流化床锅炉变负荷蒸汽压与秸秆燃料量的三阶连续时间动态模型，参见式(1)：1) Consider the third-order continuous-time dynamic model of variable load steam pressure and straw fuel amount of straw direct-fired circulating fluidized bed boiler, see equation (1):
其中，t表示时间变量；x
1表示循环流化床锅炉的蒸汽压，MPa；x
2表示循环流化床锅炉蒸汽压的变化速度；x
3表示循环流化床锅炉蒸汽压的变化加速度；“.”表示对应变量的一阶导数；M表示用于燃烧的秸秆燃料量，t/h；常数G表示循环流化床锅炉蒸汽压的稳态增益；常数T
1、T
2和τ分别表示循环流化床锅炉汽包压力时间常数、蒸汽压时间常数和时滞，s；
Wherein t represents a time variable; x 1 represents the vapor pressure of the circulating fluidized bed boiler, MPa; x 2 represents the rate of change of the vapor pressure of the circulating fluidized bed boiler; x 3 represents the variable acceleration of the vapor pressure of the circulating fluidized bed boiler; "represents the first derivative of the corresponding variable; M represents the amount of straw fuel used for combustion, t/h; the constant G represents the steady-state gain of the vapor pressure of the circulating fluidized bed boiler; the constants T 1 , T 2 and τ represent the cycle respectively Fluidized bed boiler drum pressure time constant, vapor pressure time constant and time lag, s;
2)、定义秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪偏差的积分量q(t)，参见式(2)：2) Define the integral amount q(t) of the variable load vapor pressure tracking deviation of the straw direct-fired circulating fluidized bed boiler, see equation (2):
其中，符号s表示积分器内的积分时间变量；P
r表示秸秆直燃循环流化床锅炉蒸汽压的目标值；求积分量q(t)的一阶导数，参见式(3)：
Wherein, the symbol s represents the integral time variable in the integrator; P r represents the target value of the vapor pressure of the straw direct-fired circulating fluidized bed boiler; and the first derivative of the integral quantity q(t) is obtained, see equation (3):
其中，
表示蒸汽压跟踪偏差积分量对时间变量的一阶导数；
among them, Indicates the first derivative of the vapor pressure tracking deviation integral amount versus the time variable;
3)、结合式(1)和式(3)，建立秸秆直燃循环流化床锅炉变负荷蒸汽压与秸秆燃料量的连续时间扩展状态空间模型，参见式(4)：3) Combining equations (1) and (3), establish a continuous time extended state space model of variable load steam pressure and straw fuel quantity of straw direct-fired circulating fluidized bed boiler, see equation (4):
其中，列向量z＝[x
1,x
2,x
3,q]
T，上标T表示向量转置；矩阵A、B和C分别为
Wherein, the column vector z=[x 1 , x 2 , x 3 , q] T , the superscript T represents vector transposition; the matrices A, B and C are respectively
4)、给定一个参数μ>0，设计用于计算秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制***在t时刻的秸秆燃烧量的跟踪控制律，参见式(5)：4), given a parameter μ>0, designed to calculate the tracking control law of straw burning amount at time t of variable load steam pressure tracking control system of straw direct-fired circulating fluidized bed boiler, see formula (5):
M(t)＝-μBWz(t) (5)M(t)=-μBWz(t) (5)
其中，矩阵W为正定对称矩阵，通过MatLab函数care计算，参见式(6)：Among them, the matrix W is a positive definite symmetric matrix, calculated by the MatLab function care, see equation (6):
其中，矩阵I
4为4阶单位矩阵；
Wherein, the matrix I 4 is a fourth-order unit matrix;
5)、在线测量读取秸秆直燃循环流化床锅炉蒸汽压的实际值和目标值，根据式(5)实时计算循环流化床锅炉的秸秆燃烧量，循环流化床锅炉燃烧自动控制***根据秸秆燃烧量的计算结果实时调整进入循环流化床锅炉内的秸秆燃烧量；5) On-line measurement and reading of the actual value and target value of the steam pressure of the straw direct-fired circulating fluidized bed boiler, calculating the straw burning amount of the circulating fluidized bed boiler according to formula (5), and the automatic control system of the circulating fluidized bed boiler combustion According to the calculation result of straw burning amount, the amount of straw burning into the circulating fluidized bed boiler is adjusted in real time;
在下一个控制周期时，重新测量读取循环流化床锅炉蒸汽压的实际值和目标值，根据式(5)实时计算循环流化床锅炉的秸秆燃烧量，循环流化床锅炉燃烧自动控制***根据秸秆燃烧量的计算结果实时调整进入循环流化床锅炉内的秸秆燃烧量，如此周而复始，实现秸秆直燃循环流化床锅炉变负荷蒸汽压对目标值P
r的自动跟踪控制。
In the next control cycle, re-measure the actual value and target value of the vapor pressure of the circulating fluidized bed boiler, calculate the straw burning amount of the circulating fluidized bed boiler according to formula (5), and automatically control the combustion system of the circulating fluidized bed boiler. According to the calculation result of straw burning amount, the amount of straw burning into the circulating fluidized bed boiler is adjusted in real time, so that the automatic tracking control of the variable load vapor pressure of the straw direct-fired circulating fluidized bed boiler to the target value P r is realized.
本实施例为秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制过程，具体操作如下：This embodiment is a variable load steam pressure tracking control process for a straw direct-fired circulating fluidized bed boiler. The specific operations are as follows:
1、在参数设置界面中，输入秸秆自燃循环流化床锅炉变负荷蒸汽压跟踪控制过程的常数值G＝5、T
1＝5、T
2＝90和τ＝20；输入控制器参数μ；
1. In the parameter setting interface, input the constant values of the variable load vapor pressure tracking control process of the straw spontaneous combustion circulating fluidized bed boiler G=5, T 1 =5, T 2 =90 and τ=20; input controller parameter μ;
2、在组态界面上点击“调试”按钮进入调试界面，启动主控计算机的CPU调用事先编制好的“跟踪控制程序”调试确定控制器参数μ，具体过程如下：根据参数 μ的取值与调整规则，综合考虑秸秆直燃循环流化床锅炉蒸汽压响应的超调量、跟踪调整时间、阻尼效应和秸秆燃烧量之间的综合性能，调试参数得到μ＝0.0015，将调试结果保存到计算机存储单元RAM中；2. Click the “Debug” button on the configuration interface to enter the debugging interface. Start the CPU of the main control computer and call the “Tracking Control Program” compiled in advance to determine the controller parameter μ. The specific process is as follows: According to the value of the parameter μ Adjust the rules, comprehensively consider the over-regulation of the vapor pressure response of the straw direct-fired circulating fluidized bed boiler, the tracking adjustment time, the damping effect and the comprehensive performance between the straw burning amount. The debugging parameters are μ=0.0015, and the debugging results are saved to the computer. Storage unit RAM;
3、点击组态界面“运行”按钮，启动秸秆直燃循环流化床锅炉控制计算机的CPU读取秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制过程模型参数和控制器参数，执行“秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制程序”，通过在线测量读取循环流化床锅炉蒸汽压的实际值和目标值，计算并控制进入循环流化床锅炉内的秸秆燃烧量，实现秸秆直燃循环流化床锅炉对蒸汽压目标值P
r的自动跟踪控制。在下一个控制周期到达时，在线测量读取循环流化床锅炉蒸汽压的实际值和目标值，之后重复整个执行过程，如此周而复始，实现秸秆直燃循环流化床锅炉对蒸汽压目标值P
r的自动跟踪控制。
3. Click the “Run” button on the configuration interface to start the CPU of the straw direct-fired circulating fluidized bed boiler control computer to read the model parameters and controller parameters of the variable load vapor pressure tracking control process of the straw direct-fired circulating fluidized bed boiler. The variable load steam pressure tracking control program for straw direct-fired circulating fluidized bed boilers, the actual value and target value of the vapor pressure of the circulating fluidized bed boiler are read and measured online, and the amount of straw burning into the circulating fluidized bed boiler is calculated and controlled. To realize the automatic tracking control of the steam pressure target value P r of the straw direct-fired circulating fluidized bed boiler. When the next control cycle arrives, the actual value and the target value of the vapor pressure of the circulating fluidized bed boiler are measured online, and then the entire execution process is repeated, so that the steam pressure target value P r of the straw direct combustion circulating fluidized bed boiler is realized. Automatic tracking control.
实际跟踪控制效果如图1和图2所示，图1为秸秆直燃循环流化床锅炉蒸汽压跟踪实时曲线，其中，虚线为秸秆直燃循环流化床锅炉蒸汽压目标值实时曲线，实线为秸秆直燃循环流化床锅炉蒸汽压实时响应曲线；图2为秸秆直燃循环流化床锅炉的秸秆燃烧量实时曲线。The actual tracking control effect is shown in Figure 1 and Figure 2. Figure 1 shows the real-time curve of the vapor pressure tracking of the straw direct-fired circulating fluidized bed boiler. The dotted line shows the real-time curve of the vapor pressure target value of the straw direct-fired circulating fluidized bed boiler. The line is the steam pressure real-time response curve of the straw direct-fired circulating fluidized bed boiler; Figure 2 is the real-time curve of the straw burning amount of the straw direct-fired circulating fluidized bed boiler.
以上阐述的是本发明给出的一个实施例所表现出优良控制性能的秸秆直燃循环流化床锅炉变负荷蒸汽压自动跟踪控制效果。需要指出，上述实施例用来解释说明本发明，而不是对本发明进行限制，在本发明的精神和权利要求的保护范围内，对本发明做出的任何修改，都落入本发明的保护范围。What has been described above is an automatic tracking control effect of variable load steam pressure of a straw direct-fired circulating fluidized bed boiler exhibiting excellent control performance according to an embodiment of the present invention. It is to be noted that the above-described embodiments are intended to be illustrative of the present invention and are not intended to limit the scope of the invention, and any modifications of the invention are intended to be included within the scope of the invention.
Claims (1)
- 一种秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制方法，其特征在于：所述方法包括如下步骤：A variable load vapor pressure tracking control method for a straw direct-fired circulating fluidized bed boiler, characterized in that the method comprises the following steps:1)、考虑秸秆直燃循环流化床锅炉变负荷蒸汽压与秸秆燃料量的三阶连续时间动态模型，参见式(1)：1) Consider the third-order continuous-time dynamic model of variable load steam pressure and straw fuel amount of straw direct-fired circulating fluidized bed boiler, see equation (1):
其中，t表示时间变量；x 1表示循环流化床锅炉的蒸汽压，MPa；x 2表示循环流化床锅炉蒸汽压的变化速度；x 3表示循环流化床锅炉蒸汽压的变化加速度；“.”表示对应变量的一阶导数；M表示用于燃烧的秸秆燃料量，t/h；常数G表示循环流化床锅炉蒸汽压的稳态增益；常数T 1、T 2和τ分别表示循环流化床锅炉汽包压力时间常数、蒸汽压时间常数和时滞，s； Wherein t represents a time variable; x 1 represents the vapor pressure of the circulating fluidized bed boiler, MPa; x 2 represents the rate of change of the vapor pressure of the circulating fluidized bed boiler; x 3 represents the variable acceleration of the vapor pressure of the circulating fluidized bed boiler; "represents the first derivative of the corresponding variable; M represents the amount of straw fuel used for combustion, t/h; the constant G represents the steady-state gain of the vapor pressure of the circulating fluidized bed boiler; the constants T 1 , T 2 and τ represent the cycle respectively Fluidized bed boiler drum pressure time constant, vapor pressure time constant and time lag, s;2)、定义秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪偏差的积分量q(t)，参见式(2)：2) Define the integral amount q(t) of the variable load vapor pressure tracking deviation of the straw direct-fired circulating fluidized bed boiler, see equation (2):
其中，符号s表示积分器内的积分时间变量；P r表示秸秆直燃循环流化床锅炉蒸汽压的目标值；求积分量q(t)的一阶导数，参见式(3)： Wherein, the symbol s represents the integral time variable in the integrator; P r represents the target value of the vapor pressure of the straw direct-fired circulating fluidized bed boiler; and the first derivative of the integral quantity q(t) is obtained, see equation (3):
其中，表示蒸汽压跟踪偏差积分量对时间变量的一阶导数； among them,
Indicates the first derivative of the vapor pressure tracking deviation integral amount versus the time variable;3)、结合式(1)和式(3)，建立秸秆直燃循环流化床锅炉变负荷蒸汽压与秸秆燃料量的连续时间扩展状态空间模型，参见式(4)：3) Combining equations (1) and (3), establish a continuous time extended state space model of variable load steam pressure and straw fuel quantity of straw direct-fired circulating fluidized bed boiler, see equation (4):
其中，列向量z＝[x 1,x 2,x 3,q] T，上标T表示向量转置；矩阵A、B和C分别为 Wherein, the column vector z=[x 1 , x 2 , x 3 , q] T , the superscript T represents vector transposition; the matrices A, B and C are respectively
4)、给定一个参数μ>0，设计用于计算秸秆直燃循环流化床锅炉变负荷蒸汽压跟踪控制***在t时刻的秸秆燃烧量的跟踪控制律，参见式(5)：4), given a parameter μ>0, designed to calculate the tracking control law of straw burning amount at time t of variable load steam pressure tracking control system of straw direct-fired circulating fluidized bed boiler, see formula (5):M(t)＝-μBWz(t) (5)M(t)=-μBWz(t) (5)其中，矩阵W为正定对称矩阵，通过MatLab函数care计算，参见式(6)：Among them, the matrix W is a positive definite symmetric matrix, calculated by the MatLab function care, see equation (6):
其中，矩阵I 4为4阶单位矩阵； Wherein, the matrix I 4 is a fourth-order unit matrix;5)、在线测量读取秸秆直燃循环流化床锅炉蒸汽压的实际值和目标值，根据式(5)实时计算循环流化床锅炉的秸秆燃烧量，循环流化床锅炉燃烧自动控制***根据秸秆燃烧量的计算结果实时调整进入循环流化床锅炉内的秸秆燃烧量；在下一个控制周期时，重新测量读取循环流化床锅炉蒸汽压的实际值和目标值，根据式(5)实时计算循环流化床锅炉的秸秆燃烧量，循环流化床锅炉燃烧自动控制***根据秸秆燃烧量的计算结果实时调整进入循环流化床锅炉内的秸秆燃烧量，如此周而复始，实现秸秆直燃循环流化床锅炉变负荷蒸汽压对目标值P r的自动跟踪控制。 5) On-line measurement and reading of the actual value and target value of the steam pressure of the straw direct-fired circulating fluidized bed boiler, calculating the straw burning amount of the circulating fluidized bed boiler according to formula (5), and the automatic control system of the circulating fluidized bed boiler combustion According to the calculation result of straw burning amount, the amount of straw burning into the circulating fluidized bed boiler is adjusted in real time; in the next control cycle, the actual value and the target value of the vapor pressure of the circulating fluidized bed boiler are re-measured, according to formula (5) The straw burning amount of the circulating fluidized bed boiler is calculated in real time, and the automatic control system of the circulating fluidized bed boiler is adjusted in real time according to the calculation result of the burning amount of straw, and the straw burning amount in the circulating fluidized bed boiler is adjusted in real time, so that the straw direct combustion cycle is realized. The automatic tracking control of the variable load vapor pressure of the fluidized bed boiler to the target value P r .
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711323880.6A CN108119909B (en) | 2017-12-13 | 2017-12-13 | A kind of stalk direct combustion circulating fluidized bed boiler varying duty vapour pressure tracking and controlling method |
| CN201711323880.6 | 2017-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2019114402A1 true WO2019114402A1 (en) | 2019-06-20 |
Family
ID=62229846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2018/110347 WO2019114402A1 (en) | 2017-12-13 | 2018-10-16 | Variable load steam pressure tracking control method for straw direct-fired circulating fluidized bed boiler |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108119909B (en) |
| WO (1) | WO2019114402A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108119909B (en) * | 2017-12-13 | 2019-03-05 | 浙江工业大学 | A kind of stalk direct combustion circulating fluidized bed boiler varying duty vapour pressure tracking and controlling method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5400850B2 (en) * | 2011-10-12 | 2014-01-29 | 川崎重工業株式会社 | Method and apparatus for controlling exhaust heat boiler system |
| CN105202571A (en) * | 2015-10-20 | 2015-12-30 | 国家电网公司 | Thermal generator set main steam pressure optimization control method |
| CN105588122A (en) * | 2015-12-22 | 2016-05-18 | 山东中实易通集团有限公司 | Fuel control method and system applied to circulating fluidized bed boiler |
| CN108119909A (en) * | 2017-12-13 | 2018-06-05 | 浙江工业大学 | A kind of stalk direct combustion circulating fluidized bed boiler varying duty vapour pressure tracking and controlling method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900348A (en) * | 2009-06-01 | 2010-12-01 | 上海捷控软件技术有限公司 | Method for predicting, controlling and improving efficiency of thermal power unit steam turbine by using steam pressure |
| CN105757711B (en) * | 2016-03-18 | 2018-05-08 | 国家电投集团河南电力有限公司技术信息中心 | A kind of wide load main steam pressure control method of cogeneration units |
-
2017
- 2017-12-13 CN CN201711323880.6A patent/CN108119909B/en active Active
-
2018
- 2018-10-16 WO PCT/CN2018/110347 patent/WO2019114402A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5400850B2 (en) * | 2011-10-12 | 2014-01-29 | 川崎重工業株式会社 | Method and apparatus for controlling exhaust heat boiler system |
| CN105202571A (en) * | 2015-10-20 | 2015-12-30 | 国家电网公司 | Thermal generator set main steam pressure optimization control method |
| CN105588122A (en) * | 2015-12-22 | 2016-05-18 | 山东中实易通集团有限公司 | Fuel control method and system applied to circulating fluidized bed boiler |
| CN108119909A (en) * | 2017-12-13 | 2018-06-05 | 浙江工业大学 | A kind of stalk direct combustion circulating fluidized bed boiler varying duty vapour pressure tracking and controlling method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108119909A (en) | 2018-06-05 |
| CN108119909B (en) | 2019-03-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Havlena et al. | Application of model predictive control to advanced combustion control | |
| CN105627356B (en) | A kind of metallurgical gas fired-boiler combustion control system | |
| CN105955210B (en) | The dynamic optimization method of waste heat boiler and Industrial Boiler combined generating system | |
| CN111754093A (en) | Fly ash carbon content prediction method based on coal quality prediction and PSO-SVM | |
| Sermyagina et al. | Integration of torrefaction and CHP plant: Operational and economic analysis | |
| CN106622620A (en) | Medium-speed coal mill model building method based on system dynamics | |
| Böhler et al. | Fuzzy model predictive control for small-scale biomass combustion furnaces | |
| Cheng et al. | Maximum burning rate and fixed carbon burnout efficiency of power coal blends predicted with back-propagation neural network models | |
| Zhao et al. | Coal-fired utility boiler modelling for advanced economical low-NOx combustion controller design | |
| CN114036855A (en) | Dynamic coal blending method, system, equipment and storage medium for thermal power plant | |
| Qiao | A novel online modeling for NOx generation prediction in coal-fired boiler | |
| WO2019114402A1 (en) | Variable load steam pressure tracking control method for straw direct-fired circulating fluidized bed boiler | |
| CN110889638A (en) | Thermal power plant operation evaluation method and related equipment | |
| Mo et al. | Analysis on influencing factors and improvement of thermal efficiency of bagasse boilers based on performance test data | |
| Hussain et al. | Pilot-scale biomass gasification system for hydrogen production from palm kernel shell (part B): dynamic and control studies | |
| CN116401948A (en) | Online prediction method and system for generating amount of power station boiler ash based on LSTM | |
| WO2019114401A1 (en) | Steam pressure pole-placement adjustment method of straw burning circulating fluidized bed boiler | |
| CN108253413B (en) | A kind of biomass cogeneration of heat and power recirculating fluidized bed main steam pressure tracking and controlling method | |
| Kortela et al. | Fault-tolerant model predictive control (FTMPC) for the BioGrate boiler | |
| CN108253414B (en) | A kind of biomass cogeneration of heat and power process circulating fluidized bed boiler main steam pressure adjustment control method | |
| CN112036091A (en) | Method for predicting air quantity of nozzle of four-corner tangential burner by using regression algorithm | |
| Kortela et al. | Improvement of load-following capacity of grate boilers based on the combustion power soft-sensor | |
| Abdullah et al. | Black smoke elimination via PID controlled co-firing technique at palm oil mill | |
| Schörghuber et al. | Control of a biomass-furnace based on input-output-linearization | |
| CN113515042B (en) | Multi-mode dry quenching Jiao Shaosun rate real-time computing system and computing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18887683 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 18887683 Country of ref document: EP Kind code of ref document: A1 |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 18887683 Country of ref document: EP Kind code of ref document: A1 |
|
| 32PN | Ep: public notification in the ep bulletin as address of the adressee cannot be established |
Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 17/02/2021) |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 18887683 Country of ref document: EP Kind code of ref document: A1 |