JP4299350B2 - Thermal power plant control device and thermal power plant control method - Google Patents

Description

  The present invention relates to a thermal power plant control device and a thermal power plant control method, and more particularly, thermal power generation that reduces the concentration of carbon monoxide discharged from a thermal power plant including a boiler that generates coal using coal as fuel. The present invention relates to a plant control apparatus and a thermal power plant control method.

  In a thermal power plant equipped with a boiler that generates power using coal as fuel, it is required to reduce emissions of environmentally hazardous substances such as carbon monoxide (CO) and nitrogen oxide (NOx) in exhaust gas discharged from the boiler. ing.

  From such a background, as a burner and an air port installed in a boiler, a structure of a boiler burner and an air port for reducing CO and NOx in the exhaust gas of the boiler has been proposed.

  For example, Japanese Patent Application Laid-Open No. 2005-273793 discloses a structure of a burner installed in a boiler that achieves reduction of NOx in the exhaust gas of a boiler that generates power using coal as fuel and cooling of the burner.

  Japanese Unexamined Patent Application Publication No. 2006-162185 describes the structure of an air port installed in a boiler that simultaneously reduces NOx and CO in the exhaust gas of a boiler that generates power using coal as fuel.

  Both techniques of Japanese Patent Application Laid-Open Nos. 2005-273973 and 2006-162185 employ two-stage combustion as a method for burning coal as fuel. In this two-stage combustion method, coal supplied from a burner is burned in a state of air shortage, and then air for complete combustion is supplied from an air port and burned.

  JP-A-5-33906 discloses a burner installed in a boiler that generates power using coal as a fuel, and the concentration of unburned matter and NOx in the exhaust gas of the boiler by controlling the flow rate of air supplied from an air port. A technique for reducing the operating cost of a boiler by suppressing the value in the range of the regulation value is described.

That is, in this Japanese Patent 5-33906 discloses a technique disclosed, and the value of the O ₂ concentration measured by the set value of the oxygen (O ₂₎ concentration in the exhaust gas of the boiler outlet and the O ₂ concentration meter matches In this way, the flow rate of air supplied from the burner and the air port is determined and the fuel is combusted. It is to reduce.

JP 2005-27397A JP 2006-162185 A JP-A-5-33906

By the way, in the technique described in JP-A-5-33906, the O ₂ concentration measuring device extracts a part of the exhaust gas passing through the boiler outlet flow path and measures the O ₂ concentration contained in the exhaust gas. this O ₂ to grasp the O ₂ concentration of 1 point in the boiler outlet channel extracting the exhaust gas by the concentration measuring instrument can, O ₂ concentration of the other points of the boiler outlet flow path that has not extracted the exhaust gas I do n’t know.

Therefore, when the O ₂ concentration distribution of the exhaust gas flowing through the boiler outlet flow path is uneven, even if the O ₂ concentration value measured by the O ₂ concentration measuring device is high, the O ₂ concentration may be low at another point. There is sex. Since CO is not oxidized in the region where the O ₂ concentration is low in the boiler outlet flow path, CO remains in the exhaust gas.

However, in the technique described in Japanese Patent Application Laid-Open No. 5-33906, the air flow rate supplied from the burner installed in the boiler with the representative value or the average value of the O ₂ concentration measurement value set as the target value and the air port since controls the, if there is a bias in the O ₂ concentration distribution in the exhaust gas flowing through the boiler outlet channel, out of the boiler outlet channel, accurately detect the area O ₂ concentration is less to oxidize CO Therefore, it is difficult to effectively reduce CO in the boiler exhaust gas without controlling the air flow rate that needs to be supplied to the region having a low O ₂ concentration.

An object of the present invention is to supply a necessary air flow rate to a region having a low O ₂ concentration when the O ₂ concentration distribution in the exhaust gas at the boiler outlet is biased in a boiler using coal as fuel, and to reduce CO 2 in the exhaust gas of the boiler. It is providing the control apparatus of a thermal power plant and the control method of a thermal power plant which reduce effectively.

The control apparatus for a thermal power plant according to the present invention includes a burner that supplies coal and air as fuel to a boiler, and a downstream side in the flow direction of combustion gas generated by burning the coal and air as fuel supplied from the burner. In a control device for a thermal power plant having a boiler having an air port for supplying air to the combustion gas, the boiler for the thermal power plant has a measuring instrument for measuring the oxygen concentration or carbon monoxide concentration of the combustion gas at the outlet of the boiler. Equipped with a physical model that simulates the thermal power plant in the controller that constitutes the control device of the thermal power plant, and used to calculate the path of the air flow rate supplied to the boiler from the burner or air port using the physical model Numerical analysis to calculate the area where the air flow rate supplied to the boiler from the burner or air port reaches the boiler outlet based on And line unit, the flow rate of air supplied from the burner or Airport to the boiler by using the data of at least one way of numerical analysis data obtained by executing measurement signal data or the numerical analysis and execution means obtained from thermal power plant boiler The arrival area estimation means for estimating the area reaching the outlet, the measured value of the carbon monoxide concentration of the combustion gas at the outlet of the boiler or the measured value of the oxygen concentration measured by the measuring instrument, and the supply estimated by the arrival area estimation means The flow rate of air reaching the high-carbon monoxide concentration region or low-oxygen concentration region of the combustion gas at the boiler outlet measured by the measuring instrument based on the estimated result of the region where the discharged air reaches the boiler outlet increases. Operation signal generating means for setting the flow rate of air supplied to the boiler from a burner or air port Characterized in that was.

The control device for a thermal power plant according to the present invention includes a burner for supplying fuel coal and air into a boiler, and a downstream flow direction of combustion gas generated by burning the fuel coal and air supplied from the burner. In a control device for a thermal power plant having an air port for supplying air to the combustion gas on the side, the boiler of the thermal power plant is provided with a measuring instrument for measuring the oxygen concentration or carbon monoxide concentration of the combustion gas at the outlet of the boiler Based on the calculation of the flow path of the air flow supplied to the boiler from the burner or the air port using the physical model having a physical model that simulates the thermal power plant in the controller constituting the control device of the thermal power plant Perform numerical analysis to calculate the area where the air flow rate supplied to the boiler from the burner or air port reaches the boiler outlet When, the air supplied from the burner or airport to reach the exit of the boiler by means of at least 1-way data among the numerical analysis data obtained by executing measurement signal data or the numerical analysis and execution means obtained from a thermal power plant A region estimation means for estimating the region, a distribution estimation means for estimating the distribution of oxygen concentration or carbon monoxide concentration in the combustion gas at the outlet of the boiler, and the combustion gas at the outlet of the boiler estimated by the distribution estimation means Combustion gas at the boiler outlet measured by the measuring instrument based on the distribution estimation result of the carbon monoxide concentration or the oxygen concentration and the estimation result of the region where the supplied air estimated by the reaching region estimation means reaches the boiler outlet Burner or so that the air flow rate to reach the high carbon monoxide concentration region or low oxygen concentration region increases. Characterized in that the operating signal generating means for setting the air flow rate supplied from the airport to the boiler with each.

The control device for a thermal power plant according to the present invention includes a burner that supplies fuel coal and air to a boiler, and a downstream side in a flow direction of combustion gas generated by burning the coal and air of fuel supplied from the burner. In a control device for a thermal power plant equipped with a boiler having an air port for supplying air to the combustion gas, a measurement for measuring the oxygen concentration or carbon monoxide concentration of the combustion gas at the outlet of the boiler in the boiler of the thermal power plant A controller that constitutes a thermal power plant control device, and that is measured by the measuring device and an arrival area estimation means for estimating an area where the air supplied from the boiler burner or the air port reaches the outlet of the boiler. The measured value of the carbon monoxide concentration or the measured value of the oxygen concentration of the combustion gas at the outlet of the boiler and the supply estimated by the reaching area estimation means The flow rate of air reaching the region of the combustion gas having a high carbon monoxide concentration or the region of low oxygen concentration measured by the measuring instrument based on the estimation result of the region where the air reaches the boiler outlet increases. Operation signal generating means for setting the flow rate of air supplied to the boiler from the burner or the air port as described above, and the measuring instrument is oxidized for each divided region obtained by dividing the flow passage cross section of the boiler outlet into an arbitrary number of divided regions. The operation signal generation means provided in the controller is arranged to measure a measured value of carbon concentration or an oxygen concentration, and is measured by the measuring device provided for each divided region of the flow passage cross section of the boiler outlet. The measured value of the carbon oxide concentration or the measured value of the oxygen concentration and the air supplied from the burner or the air port of the boiler by the arrival area estimation means reach the boiler outlet. The first influence value of the carbon monoxide concentration or the second influence value of the oxygen concentration, which is the sum of the values obtained by integrating the estimated values of the regions, is calculated, respectively, and the burner having a large proportion of the first influence value Alternatively, the air flow rate of the air port is increased, or the burner or the air port having a large proportion of the second influence value is controlled to decrease the air flow rate .
The control device for a thermal power plant according to the present invention includes a burner for supplying fuel coal and air into a boiler, and a downstream flow direction of combustion gas generated by burning the fuel coal and air supplied from the burner. In a control device for a thermal power plant having an air port for supplying air to the combustion gas on the side, the boiler of the thermal power plant is provided with a measuring instrument for measuring the oxygen concentration or carbon monoxide concentration of the combustion gas at the outlet of the boiler A controller that constitutes the control device of the thermal power plant, an arrival area estimation means for estimating an area where the air supplied from the burner or the air port reaches the outlet of the boiler, and a distribution of the oxygen concentration of the combustion gas at the outlet of the boiler Alternatively, the distribution estimation means for estimating the distribution of the carbon monoxide concentration and the monoxide oxidation of the combustion gas at the boiler outlet estimated by the distribution estimation means One of the combustion gas at the boiler outlet measured by the measuring instrument based on the distribution estimation result of the elementary concentration or oxygen concentration and the estimation result of the region where the supplied air estimated by the reaching region estimation means reaches the boiler outlet. Operation signal generating means for setting the air flow rate supplied to the boiler from the burner or the air port so that the air flow rate reaching the high carbon oxide concentration region or the low oxygen concentration region is increased. The operation signal generating means provided in the controller is arranged to measure the measured value of the carbon monoxide concentration or the oxygen concentration for each divided region obtained by dividing the flow passage cross section of the boiler outlet into an arbitrary number of divided regions. The measured value of the carbon monoxide concentration or the measured value of the oxygen concentration measured by the measuring device arranged for each divided region of the flow passage cross section of the boiler outlet, and the reaching region estimation means The first influence value of the carbon monoxide concentration or the second influence value of the oxygen concentration, which is the sum of values obtained by integrating the estimated value of the area where the air supplied from the boiler burner or the air port reaches the outlet of the boiler Control is performed so that the air flow rate of the burner or the air port having a large proportion of the first influence value is increased or the air flow rate of the burner or the air port having a large proportion of the second influence value is decreased. It is characterized by having a function.

Also, the thermal power plant control method of the present invention is generated by supplying fuel coal and air from a burner provided in the boiler into the boiler and burning the fuel coal and air supplied from the burner in the boiler. In a control method of a thermal power plant that generates combustion gas to be supplied and supplies air to the combustion gas from an air port provided in the boiler on the downstream side in the flow direction of the generated combustion gas, the boiler gas of the thermal power plant is provided with an outlet A measuring instrument measures the oxygen concentration or carbon monoxide concentration in the combustion gas at the outlet of the boiler, and internally has a physical model that simulates the thermal power plant by means of numerical analysis execution means provided in the controller that controls the thermal power plant. The controller is provided based on the calculation of the path of the air flow rate supplied to the boiler from the burner or the air port using the physical model. The boiler measured by the measuring instrument obtained from the thermal power plant by the reaching area estimating means provided in the controller, calculating the area where the air flow rate supplied to the boiler from the burner or the air port reaches the boiler outlet by the reaching area estimating means Supply to boiler from burner or air port using at least one of measurement signal data of oxygen concentration or carbon monoxide concentration in combustion gas at outlet or numerical analysis data obtained by executing the numerical analysis execution means The region where the air flow rate reaches the boiler outlet is estimated, and the measured value of the carbon monoxide concentration or the oxygen concentration of the combustion gas at the boiler outlet measured by the measuring instrument by the operation signal generating means provided in the controller Supplied from burner or airport estimated by the value and the reach area estimation means The flow rate of air reaching the high carbon monoxide concentration region or the low oxygen concentration region in the combustion gas at the boiler outlet measured by the measuring instrument based on the estimation result of the region where the gas reaches the boiler outlet increases. Thus, the air flow rate supplied to the boiler from the burner or the air port is set and controlled.
Also, the control method of the thermal power plant according to the present invention is such that fuel coal and air are supplied from a burner provided in the boiler into the boiler, and the fuel coal and air supplied from the burner are combusted in the boiler. In a control method for a thermal power plant that generates gas and supplies air to the combustion gas from an air port provided in the boiler at the downstream side in the flow direction of the generated combustion gas, a measuring instrument provided at the outlet of the boiler of the thermal power plant Measure the oxygen concentration or carbon monoxide concentration in the combustion gas at the outlet of the boiler, and have a physical model that simulates the thermal power plant by means of numerical analysis execution means equipped in the controller that controls the thermal power plant The reach area provided in the controller based on the calculation of the path of the air flow rate supplied to the boiler from the burner or the air port using the physical model The area where the air flow rate supplied to the boiler from the burner or the air port reaches the boiler outlet by the fixing means, and the boiler outlet measured by the measuring instrument obtained from the thermal power plant by the reaching area estimating means provided in the controller is calculated. Air supplied to a boiler from a burner or an air port using at least one of measurement signal data of oxygen concentration or carbon monoxide concentration in combustion gas or numerical analysis data obtained by executing the numerical analysis execution means The region where the flow rate reaches the boiler outlet is estimated, the distribution estimating means provided in the controller estimates the oxygen concentration or carbon monoxide concentration distribution in the combustion gas at the boiler outlet, and the operation provided in the controller Distribution of carbon monoxide concentration or oxygen concentration estimated by the distribution estimating means by the signal generating means Carbon monoxide in the combustion gas at the boiler outlet measured by the measuring instrument based on the measurement result and the estimation result of the reaching area of the area where the supplied air estimated by the reaching area estimating means reaches the boiler outlet The air flow rate supplied to the boiler from the burner or the air port is set and controlled so that the air flow rate reaching the high concentration region or the low oxygen concentration region increases.

Also, the control method of the thermal power plant according to the present invention is such that fuel coal and air are supplied from a burner provided in the boiler into the boiler, and the fuel coal and air supplied from the burner are combusted in the boiler. In a control method of a thermal power plant that generates gas and supplies air to the combustion gas from an air port provided in the boiler at a downstream side in the flow direction of the generated combustion gas, a flow passage cross section at the outlet of the boiler of the thermal power plant Measure the carbon monoxide concentration or oxygen concentration in the combustion gas for each divided region at the outlet of the boiler with the measuring device provided for each divided region divided into an arbitrary number of divided regions, and generate the operation signal provided for the controller The measured value of the carbon monoxide concentration or the measured value of the oxygen concentration for each divided area of the boiler outlet by means of the boiler burner or air The first influence value of the carbon monoxide concentration or the second influence value of the oxygen concentration, which is the sum total of the estimated value of the area where the air supplied from the boiler reaches the outlet of the boiler, is obtained. Control to increase the air flow rate of the burner or air port that accounts for a large percentage of the value, or decrease the air flow rate of the burner or air port that accounts for a large percentage of the second influence value, and generate an operation signal for the controller The measured value of the carbon monoxide concentration or the measured value of the oxygen concentration of the combustion gas at the outlet of the boiler measured by the measuring instrument by means and the air supplied from the burner or the air port estimated by the reaching area estimating means is at the outlet of the boiler A region having a high carbon monoxide concentration in the combustion gas at the boiler outlet measured by the measuring instrument based on the estimation result of the reaching region or Wherein the air flow to reach the region of low oxygen concentration is controlled by setting the air flow rate supplied from the burner or airport to the boiler to increase.
Also, the control method of the thermal power plant according to the present invention is such that fuel coal and air are supplied from a burner provided in the boiler into the boiler, and the fuel coal and air supplied from the burner are combusted in the boiler. In a control method of a thermal power plant that generates gas and supplies air to the combustion gas from an air port provided in the boiler at a downstream side in the flow direction of the generated combustion gas, a flow passage cross section at the outlet of the boiler of the thermal power plant The carbon monoxide concentration or oxygen concentration in the combustion gas is measured by a measuring instrument that is divided into an arbitrary number of divided areas and provided for each divided area, and these boiler outlets are divided by the operation signal generating means provided in the controller. The measured values of carbon monoxide concentration or oxygen concentration for each region and the air supplied from the boiler burner or air port by the arrival region estimation means The first influence value of the carbon monoxide concentration or the second influence value of the oxygen concentration, which is the sum total of the estimated values of the areas reaching the outlet of the gas, is obtained, and the burner having a large proportion of the first influence value Alternatively, control is performed such that the air flow rate of the air port is increased or the air flow rate of the burner or the air port having a large ratio in the second influence value is decreased, and the combustion gas at the outlet of the boiler is provided by the distribution estimation means provided in the controller The estimation of the distribution of the carbon monoxide concentration or the oxygen concentration estimated by the distribution estimation means by the operation signal generation means provided in the controller, and the estimated reach area Of the boiler outlet measured by the measuring instrument based on the estimation result of the arrival area of the area where the supplied air estimated by the means reaches the outlet of the boiler. And controlling by setting the air flow rate supplied from the burner or airport to the boiler so that the air flow to reach the lower area regions of high or oxygen concentration of the carbon monoxide concentration in the burnt gas is increased.

According to the present invention, when there is a bias in the O ₂ concentration distribution in the exhaust gas from the boiler outlet that uses coal as the fuel, the required air flow rate is supplied to the region where the O ₂ concentration is low, and the CO in the boiler exhaust gas is effective. The thermal power plant control device and the thermal power plant control method can be realized.

  Next, a thermal power plant control apparatus and a thermal power plant control method according to embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a control block diagram showing the overall configuration of a thermal power plant control apparatus according to an embodiment of the present invention.

  In FIG. 1, a control device of a thermal power plant 100 including a boiler that uses coal as fuel is controlled by a control device 200. The control device 200 includes a reach area estimation unit 300, a numerical analysis execution unit 400, an operation signal generation unit 500, a learning unit 600, a model 700, and an evaluation value calculation unit 800 as arithmetic units. .

  The control device 200 includes a measurement signal database 210, an arrival area database 220, a numerical analysis result database 230, an operation signal database 240, a control logic database 250, and a learning information database 260 as databases.

  The control device 200 is also provided with an external input interface 201 and an external output interface 202 as interfaces with the outside.

  The control device 200 has a measurement signal that measures various state quantities from the thermal power plant 100 to the thermal power plant, for example, the oxygen concentration of the combustion gas at the boiler outlet or the carbon monoxide concentration via the external input interface 201. 1 is taken into the control device 200, and an operation signal 18 for controlling the air flow rate of, for example, a boiler burner and an air port from the control device 200 to the thermal power plant 100 via the external output interface 202. Has been sent out.

  For example, the measurement signal 1 obtained by measuring the oxygen concentration of the combustion gas at the outlet of the boiler or the carbon monoxide concentration, which is various state quantities of the thermal power plant 100 taken into the control device 200 from the thermal power plant 100, is sent to the external input interface 201. After that, the measurement signal 2 is stored in the measurement signal database 210 which is a database provided in the control device 200.

  The operation signal 17 generated by the operation signal generation unit 500 which is an arithmetic unit provided in the control device 200 is transmitted from the operation signal generation unit 500 to the external output interface 202 and is an operation which is a database provided in the control device 200. It is stored in the signal database 240.

  In addition, the numerical analysis execution means 400 that is an arithmetic device provided in the control device 200 has built a detailed physical model that simulates the thermal power plant 100 with high accuracy inside, and uses this detailed model for thermal power. Detailed and highly accurate numerical analysis for the power plant 100 is performed.

  That is, the structure of the boiler 101 constituting the thermal power plant 100 using the detailed physical model by the operation by the numerical analysis execution means 400, the structure of the burner 102 and the air port 103 installed in the boiler 101, and the burner 102 and the air port 103 The operation characteristics of the thermal power plant 100 are simulated and predicted with high accuracy by executing high-accuracy simulation calculation with the fuel flow rate and air flow rate supplied to each as boundary conditions.

  The detailed and highly accurate numerical analysis information 6 obtained by executing the numerical analysis execution means 400 using the detailed physical model is sent from the numerical analysis execution means 400 to the numerical analysis result database 230 and stored. .

  The arrival area estimation means 300 that is an arithmetic unit provided in the control device 200 uses the measurement signal data 4 stored in the measurement signal database 210 and the numerical analysis data 7 stored in the numerical analysis result database 230. The region where the air supplied to the boiler 101 from the burner 102 and the air port 103 reaches the flow path at the boiler outlet is estimated by calculation.

  The arrival area information 5 of the area where the air supplied to the boiler 101 from the burner 102 and the air port 103 estimated by the calculation by the arrival area estimation means 300 reaches the flow path at the boiler outlet is a database provided in the control device 200. It is stored in a certain reachable area database 220.

  The learning means 600 that is an arithmetic device provided in the control device 200 is configured to learn the operation method of the thermal power plant 100 for the statistical model 700 that is the arithmetic device, and the model 700 is a simple built inside. The control model of the thermal power plant 100 is configured to be simulated in a short time using a statistical model.

  That is, the operation signal 18 for controlling the thermal power plant 100 generated by the control device 200 is given from the control device 200 to the thermal power plant 100, and the measurement signal 1 that is the control result of the thermal power plant 100 is controlled from the thermal power plant 100. Similarly to the reception by the device 200, the model input 9 learned and generated by the learning means 600 of the control device 200 is given from the learning means 600 to the model 700, and the control characteristics of the thermal power plant 100 simulated by this model 700 are shown. The learning unit 600 receives the model output 10 that is a simple simulation result from the model 700.

  In the model 700 which is an arithmetic unit, the model input 9 given from the learning means 600 using the numerical analysis data 8 stored in the numerical analysis result database 230 and the measurement signal data 4 stored in the measurement signal database 210. Based on this, the control characteristics of the thermal power plant 100 are simulated in a short time using a simple physical model built inside the model 700, and the simulation result is output to the learning means 600 as the model output 10.

  The model 700 is constructed by using a statistical model such as a neural network, for example. By calculating the model 700, the numerical analysis data stored in the numerical analysis result database 230 before the operation of the thermal power plant 100 is calculated. The model output 10 is simulated using only 8 and the model output is used in combination with the measurement signal 4 stored in the measurement signal database 210 obtained by measuring the state quantity of the thermal power plant 100 after the thermal power plant 100 is operated. 8 is simulated.

  Thus, the simulation result of the thermal power plant 100 using the model 700 is different from the simulation result of the thermal power plant 100 using the detailed physical model used when the numerical analysis execution means 400 is operated. When the control characteristics of 100 are different, the model output 10 is simulated and calculated by the model 700 with emphasis on the measurement signal data 4 stored in the measurement signal database 210 that measures the state quantity of the thermal power plant 100. Thus, the characteristics of the model 700 can be brought close to the control characteristics of the thermal power plant 100.

  The learning unit 600 learns how to generate the model input 9 input from the learning unit 600 to the model 700 so that the model output 10 simulated by the model 700 has a desired value.

  The learning means 600 uses the evaluation value 11 calculated by the evaluation value calculation means 800 that is a calculation means provided in the control device 200 as an index for learning the generation method of the model input 9 by the learning means 600. You can learn at

  In this evaluation value calculation means 800, if the model output 10 simulated by the model 700 is in a desired state, the value of the evaluation value 11 input to the learning means 600 is set larger, and as the distance from the desired state increases, The evaluation value 11 is set to a small value.

  The evaluation value calculation means 800 can also calculate the evaluation value 11 by using the reach area data 16 stored in the reach area database 220 which is a database provided in the control device 200.

  The learning means 600 is constructed by applying various optimization methods such as reinforcement learning and evolutionary calculation methods.

  The learning unit 600 learns an operation method in which the evaluation value 11 calculated by the evaluation value calculation unit 800 and input to the learning unit 600 is maximized.

  Learning information data 13 such as constraint conditions and model output target values used for learning in the learning unit 600 is stored in a learning information database 260 that is a database provided in the control device 200.

  Further, the learning information data 12 as a result of learning by the learning unit 600 is output from the learning unit 600 to the learning information database 260 and stored in the learning information database 260.

  In the operation signal generating means 500 which is an arithmetic unit provided in the control device 200, the measurement signal data 3 stored in the measurement signal database 210, the reaching area data 16 stored in the reaching area database 220, and the control logic database 250 are stored. The control logic data 15 stored in the learning information 14 and the learning information data 14 stored in the learning information database 260 are acquired as necessary, and using these information, the carbon monoxide discharged from the thermal power plant 100 For example, an operation signal 17 for controlling the flow rate of air supplied to the boiler from the burner 102 and the air port 103 of the boiler 101 to reduce the concentration is generated.

  The operation signal 17 generated by the operation signal generating means 500 is configured to be sent out from the control device 200 as the operation signal 18 for the thermal power plant 100 via the external output interface 202.

  As shown in FIG. 1, an external input device 900 including a keyboard 901 and a mouse 902, a maintenance tool 910, and an image display device 950 are installed in the vicinity of the control device 200.

  The operator of the thermal power plant 100 generates a maintenance tool input signal 51 using the external input device 900 including the keyboard 901 and the mouse 902, and inputs the maintenance tool input signal 51 to the maintenance tool 910. Information of various databases arranged in the control device 200 can be displayed on the image display device 950.

  The maintenance tool 910 includes an external input interface 920, a data transmission / reception unit 930, and an external output interface 940.

  The maintenance tool input signal 51 generated by the external input device 900 is taken into the maintenance tool 910 via the external input interface 920.

  The data transmission / reception unit 930 of the maintenance tool 910 is configured to acquire the database information 50 from various databases arranged in the control device 200 according to the information of the maintenance tool input signal 52.

  The data transmission / reception processing unit 930 of the maintenance tool 910 transmits a maintenance tool output signal 53 obtained as a result of processing the database information 50 to the external output interface 940.

  The external output interface 940 transmits an output signal 54 based on the maintenance tool output signal 53 to the image display device 950 and displays it on the image display device 950.

  In the thermal power plant control apparatus 200 according to the embodiment of the present invention described above, the measurement signal database 210, the reaching area database 220, the numerical analysis result database 230, and the operation signal that constitute the database provided in the control apparatus 200 are described. The database 240, the control logic database 250, the learning information database 260, the reaching area estimation unit 300, the numerical analysis execution unit 400, the learning unit 600, the model 700, and the evaluation value calculation unit 800 constituting the calculation unit are included in the control device. However, all or a part of them may be arranged outside the control device 200.

  FIG. 2 shows a schematic configuration of a thermal power plant including a boiler that uses coal as fuel to be controlled by the thermal power plant control apparatus according to the embodiment shown in FIG.

  First, the power generation mechanism of the thermal power plant 100 provided with a boiler will be described with reference to FIG.

  In FIG. 2 (a), coal used as fuel is pulverized by a mill 110 to form pulverized coal into a boiler 101 through a burner 102 installed in the boiler 101 together with primary air for transporting coal and secondary air for combustion adjustment. The fuel coal is burned in the furnace of the boiler 101.

  The fuel coal and the primary air are led from the pipe 134 and the secondary air is led from the pipe 141 to the burner 102.

  Further, after-air for two-stage combustion is introduced into the boiler 101 through an after air port 103 installed in the boiler 101. This after air is guided from the pipe 142 to the after air port 103.

  High-temperature combustion gas generated by burning fuel coal inside the furnace of the boiler 101 flows downstream along the path indicated by the arrow in the furnace of the boiler 101, and the heat exchanger 106 disposed in the boiler 101. After passing through and exchanging heat, it becomes combustion exhaust gas and is discharged from the boiler 101 and flows down to the air heater 104 installed outside the boiler 101.

  The combustion exhaust gas that has passed through the air heater 104 is then released from the chimney to the atmosphere after removing harmful substances contained in the combustion exhaust gas with an exhaust gas treatment device (not shown).

  The feed water circulating in the boiler 101 is led to the boiler 101 through a feed water pump 105 from a condenser (not shown) installed in the turbine 108, and the furnace 101 of the boiler 101 is installed in the heat exchanger 106 installed in the furnace of the boiler 101. It is heated by the combustion gas flowing down the inside and becomes high-temperature and high-pressure steam.

  In this embodiment, the number of heat exchangers 106 is shown as one, but a plurality of heat exchangers may be arranged.

  The high-temperature and high-pressure steam generated in the heat exchanger 106 is guided to the steam turbine 108 via the turbine governor valve 107, and the steam turbine 108 is driven by the energy of the steam, and the generator 109 connected to the steam turbine 108 is connected to the generator 109. Rotate to generate electricity.

  Next, the primary air and the secondary air introduced into the furnace 101 of the boiler 101 from the burner 102 installed in the furnace of the boiler 101, and the after air port 103 installed in the furnace of the boiler 101 are introduced into the furnace of the boiler 101. The after-air route will be described.

  The primary air is guided from the fan 120 to the pipe 130, and is branched into a pipe 132 that passes through the inside of the air heater 104 and a pipe 131 that bypasses the air heater 104, and flows down the pipe 132 and the pipe 131. The primary air joins again in the pipe 133 and is guided to the mill 110.

  Air passing through the air heater 104 is heated by the combustion exhaust gas discharged from the furnace of the boiler 101.

  The primary air is used to convey coal (pulverized coal) generated in the mill 110 to the burner 102 through the pipe 133.

  The secondary air and the after air are led from the fan 121 to the pipe 140 and flow down the pipe 140 passing through the inside of the air heater 104 and heated, and then the secondary air pipe 141 on the downstream side of the pipe 140, The pipe is branched to an after-air pipe 142 and led to a burner 102 and an after-air port 103 installed in the furnace of the boiler 101, respectively.

  The control apparatus 200 of the thermal power plant 100 provided with the boiler according to the present embodiment reduces the NOx and CO concentrations in the exhaust gas of the boiler, and the amount of air to be input from the burner 102 to the boiler 101 and the boiler from the after air port 103. 101 has a function of adjusting the amount of air to be supplied to the apparatus 101.

  The thermal power plant 100 is provided with various measuring devices that detect the operating state of the thermal power plant 100, and the plant measurement signals acquired from these measuring devices are sent to the control device 200 as measurement signals 1. Sent.

As various measuring instruments for detecting the operating state of the thermal power plant 100, for example, FIG. 2 shows a flow rate measuring instrument 150, a temperature measuring instrument 151, a pressure measuring instrument 152, a power generation output measuring instrument 153, and an O ₂ concentration and / or CO 2. A concentration measuring device 154 for measuring the concentration is shown respectively.

  The flow rate measuring device 150 measures the flow rate of the feed water supplied from the feed water pump 105 to the boiler 101. Further, the temperature measuring device 151 and the pressure measuring device 152 are used to supply steam generated by heat exchange with the combustion gas flowing down the boiler 101 in the heat exchanger 106 disposed in the boiler 101 to the steam turbine 108. Measure temperature and pressure respectively.

  The amount of power generated by the generator 109 rotated by the steam turbine 108 driven by the steam generated in the heat exchanger 106 is measured by a power generation output measuring device 153.

In addition, information on the concentration of components (CO, NOx, etc.) contained in the combustion gas flowing down the boiler 101 is the O ₂ concentration and / or the CO concentration provided in the boiler outlet channel on the downstream side of the boiler 101. It is measured by a concentration measuring device 154 that measures the above.

  In general, many measuring instruments other than those shown in FIG. 2 are arranged in the thermal power plant 100, but the illustration is omitted here.

  FIG. 2B is a partially enlarged view showing the air heater 104 installed on the downstream side of the boiler 101 constituting the thermal power plant 100 and the piping arranged in the air heater 104.

  As shown in FIG. 2B, the secondary air pipe 141 and the after-air pipe 142 branched on the downstream side of the pipe 140 arranged inside the air heater 104 and the air heater 104 are arranged. Air dampers 162, 163, 161, and 160 are disposed in the pipe 132 and the pipe 131 that bypasses the air heater 104, respectively.

  By operating these air dampers 160 to 163, the area through which air passes in the pipes 131, 132, 141, 142 is changed, and the flow rate of air passing through these pipes 131, 132, 141, 142 is individually adjusted. To do.

  Then, using the operation signal 18 generated by the control device 200 that controls the thermal power plant 100 and output to the thermal power plant 100, devices such as the feed water pump 105, the mill 110, the air dampers 160, 161, 162, and 163 are connected. Manipulate.

  In the thermal power plant control apparatus according to the present embodiment, devices that adjust the state quantity of the thermal power plant such as the feed water pump 105, the mill 110, the air dampers 160, 161, 162, and 163 are called operation ends. A command signal necessary to operate this is called an operation signal.

  In addition, when air such as combustion or fuel such as pulverized coal is introduced into the boiler 101, a function capable of moving the discharge angle up, down, left and right is added to the burner 102 and the after air port 103 installed in the boiler 101. Thus, a command signal for adjusting the discharge angle of the burner 102 and the after-air port 103 can be included in the operation signal 18.

  FIG. 3 is a flowchart showing a control procedure by the control device 200 in the control device of the thermal power plant 100 including the boiler according to the embodiment shown in FIG.

  In FIG. 3, the control apparatus 200 executes control of the thermal power plant 100 by combining steps 1000, 1010, 1020, 1030, 1040, and 1050.

  Steps 1030a and 1030b, and steps 1050a and 1050b are the same operation. Hereinafter, each step will be described.

  First, in step 1000 of the numerical analysis execution in the flowchart, the numerical analysis unit 400 that builds a detailed physical model provided in the control device 200 of FIG. 1 is operated to perform highly accurate numerical analysis of the thermal power plant 100. carry out.

  A highly accurate numerical analysis result 6 of the thermal power plant 100 obtained by operating a detailed physical model of the numerical analysis means 400 is stored in the numerical analysis result database 230.

  Next, in step 1010 for determining whether or not learning is performed in the flowchart, it is determined whether or not learning to be executed is performed by combining the learning unit 600, the model 700, and the evaluation value calculation unit 800 provided in the control device 200 of FIG. To do.

  If it is determined in step 1010 of the learning presence / absence determination that learning is to be performed, the process proceeds from the learning presence / absence determination step 1010 to the YES route and enters the next model construction step 1020, where it is determined not to perform learning. In this case, the process proceeds to the NO route from step 1010 for determining the presence or absence of learning.

  Here, if it is determined that learning is to be performed, the model construction step 1020 and the operation method are included in the processing contents (step 1030 for reaching area estimation, step 1050 for operation signal generation) when it is determined not to perform learning. The process of learning step 1040 is added.

  In step 1020 of model construction in the following flowchart, based on data obtained by measuring various state quantities of the thermal power plant 100 stored in the numerical analysis result database 230 provided in the control device 200 of FIG. Then, a model 700 provided in the control device 200 of FIG. 1 is constructed, and the characteristics of the thermal power plant 100 are simulated using the constructed model 700.

  Immediately after starting operation of the thermal power plant 100, the measurement signal database 210 does not store data obtained by measuring various state quantities of the thermal power plant 100.

  Under these circumstances, a simple physical model of the model 700 is constructed using the numerical analysis result data 8 stored in the numerical analysis result database 230 to simulate the characteristics of the thermal power plant 100.

  After a while from the start of operation of the thermal power plant 100, measurement data 1 obtained by measuring various state quantities of the thermal power plant 100 is acquired, and data of various state quantities of the thermal power plant 100 are accumulated in the measurement signal database 210. If so, the model 700 is modified so that the characteristics of the model 700 and the thermal power plant 100 coincide with each other by arithmetic processing.

  As described above, by providing the model 700 with the function of executing the numerical analysis for the thermal power plant 100 in the control device 200, the CO concentration, NOx concentration in the exhaust gas discharged from the boiler of the thermal power plant 100, The gas concentration distribution at the boiler outlet can be easily predicted in a short time.

  Next, in step 1030 of the reach area estimation in the flowchart, the reach area estimating means 300 provided in the control device 200 of FIG. 1 is operated and supplied from the burner 102 and the air port 103 arranged in the boiler 101 of the thermal power plant 100. It is estimated which part of the flow path of the boiler outlet reaches the part of the flow path at the boiler outlet.

  Next, in the operation method learning step 1040 in the flowchart, the operation method of the thermal power plant 100 is learned by combining the learning means 600, the model 700, and the evaluation value calculation means 800 respectively provided in the control device 200 of FIG.

  The learning algorithm in the learning means 600 provided in the control device 200 will be described later with reference to FIG. 7, but the learning result by the learning means 600 obtained in step 1040 of this operation method learning is stored in the learning information database 260. The

  Next, in the operation signal generation step 1050 in the flowchart, the operation signal generation means 500 provided in the control device 200 of FIG. 1 is operated, and an operation that becomes a command signal output from the control device 200 to the operation end of the thermal power plant 100. A signal 17 is generated.

  FIG. 4 is a control block diagram showing the configuration of the operation signal generation means 500 provided in the control device 200 of FIG. 1 for generating the operation signal 17.

  As shown in FIG. 4, the operation signal generation unit 500 generates the reference signal 30 using the control logic data 15 stored in the control logic database 250 and the measurement signal data 3 stored in the measurement signal database 210. The first correction signal 33 is generated by using the reference signal generator 510, the arrival area data 16 stored in the arrival area database 220, and the measurement signal data 3 stored in the measurement signal database 210. The second correction signal 36 is generated by using the correction signal generation unit 520, the learning information data 14 stored in the learning information database 260, and the measurement signal data 3 stored in the measurement signal database 210. Correction signal generation unit 530, zero value generators 540 and 550 for generating a zero value signal, and input Select one signal of the two signals, it is configured to include a switch 560 and 570 to output signal the selected signal.

  4 uses the control logic data 15 stored in the control logic database 250 and the measurement signal data 3 stored in the measurement signal database 210. The reference signal generation unit 510 included in the operation signal generation unit 500 in FIG. Thus, the reference signal 30 is generated.

In the reference signal generator 510, the air supplied from the burner 102 and the air port 103 installed in the boiler 101 so that the oxygen (O ₂ ) concentration in the combustion gas in the flow path at the boiler outlet coincides with a predetermined value. Determine the flow rate.

  The first correction signal generation unit 520 constituting the operation signal generation unit 500 in FIG. 4 includes the reaching area data 16 stored in the reaching area database 220 and the measurement signal data 3 stored in the measurement signal database 210. Is used to generate the first correction signal 33.

  The first correction signal generator 520 increases the air flow rate reaching the low oxygen concentration region in the flow path at the boiler outlet, or increases the air flow rate reaching the high carbon monoxide concentration region. The control circuit which determines the air flow rate of the burner 102 installed in 101 and the air port 103 is comprised.

  Information stored in the arrival area database 220 and a method of generating the first correction signal 33 will be described later with reference to FIGS. 5 and 6.

  The second correction signal generator 530 constituting the operation signal generator 500 in FIG. 4 includes the learning information data 14 stored in the learning information database 260 and the measurement signal data 3 stored in the measurement signal database 210. Is used to generate the second correction signal 36.

  Information stored in the learning information database and a method of generating the second correction signal 36 will be described later with reference to FIG.

  In the switching devices 560 and 570 constituting the operation signal generating means 500 in FIG. 4, one signal is selected from the two input signals, and the selected signal is used as an output signal.

  Therefore, the signal 34 selected and output by the switch 560 is either the first correction signal 33 generated by the first correction signal generation unit 520 or the zero value signal 32 generated by the zero value generator 540. Match.

  The signal 37 selected and output by the switch 570 is either the second correction signal 36 generated by the second correction signal generator 530 or the zero value signal 35 generated by the zero value generator 550. Match.

  As shown in FIG. 4, the operation signal 17 output from the operation signal generation means 500 is the same as the signal 34 selected and output by the switch 560 to the reference signal 30 generated and output by the reference signal generation unit 510. , An output signal generated by adding the signal 37 selected and output by the switch 570.

  Therefore, the operation signal 17 is the same value as the reference signal 30 generated and output by the reference signal generation unit 510, and the total of the reference signal 30 and the first correction signal 33 generated by the first correction signal generation unit 520. Value, the total value of the reference signal 30 and the second correction signal 36 generated by the second correction signal generation unit 530, or the total value of the reference signal 30, the first correction signal 33 and the second correction signal 36. Either.

  Note that data that determines which one of the signals input to the switches 560 and 570 is the output signal is stored in the control logic database 250 provided in the control device 200 of FIG.

  FIG. 5 is a diagram for explaining the function of the arrival means estimation means 300 provided in the control apparatus 200 of the present embodiment shown in FIG. 1 and information stored in the arrival area database 220. Further, the numerical analysis execution means 400 shown in FIG. 1 is configured to analyze the movement of the fluid in the boiler 101 in three dimensions.

  As a result of the estimation by the arrival means estimation means 300 provided in the control device 200 of FIG. 1 and the analysis by the numerical analysis execution means 400, the air introduced from the air port 103 and burner 102 provided in the boiler 101 as shown in FIG. It is possible to calculate which region the flow rate reaches when the flow path at the outlet of the boiler is divided into twelve, and the numerical analysis data 6 as the calculation result is stored in the numerical analysis result database 230.

  In the arrival area estimation means 300, by referring to the numerical analysis data stored in the numerical analysis result database 230, the air introduced into the boiler from the air port 103 and the burner 102 provided in the boiler 101 passes through the flow path of the boiler outlet. Know which region is divided into twelve.

  Further, from the operation signal of the air flow rate and the measurement value information of the gas concentration at the boiler outlet, the air flow rate supplied from the air port 103 and the burner 102 provided in the boiler 101 reaches any region obtained by dividing the flow path at the boiler outlet into 12 parts. You can also ask.

Referring to FIG. 5 (b), FIG. 5 (b) shows the air flow rate for each of the air ports A to E of the boiler 101 and the oxygen (O ₂ ) in each divided region obtained by dividing the flow path at the boiler outlet into 12 parts. This is a relationship between measured values of concentration.

  In the present embodiment shown in FIG. 5B, the flow path at the boiler outlet is divided into four in the width direction and three in the depth direction, and an oxygen concentration measuring device is provided as a concentration measuring device 154 in each of these 12 divided regions. It is assumed that each is arranged.

  Therefore, in this embodiment, twelve oxygen concentration measuring instruments are arranged in a region obtained by dividing the boiler outlet channel into twelve, but the number of divisions of the boiler outlet channel is changed and arranged in each divided region. You may increase the number of oxygen concentration measuring devices.

  In FIG.5 (b), the air flow rate initially injected from A to E of the air port 103 of the boiler 101 is constant, and there is no place with high oxygen (O2) concentration in the flow path at the boiler outlet. Therefore, when the balance of the air flow rate was changed to increase the air flow rate supplied from A of the air port 103, the measured value of the oxygen concentration increased in the upper right region obtained by dividing the flow path at the boiler outlet into 12 parts.

  From this result, it can be determined that the air supplied from A of the air port 103 has reached the upper right region obtained by dividing the flow path at the boiler outlet into 12 parts.

  As described above, the numerical analysis execution unit 400 of the control device 200 uses the air flow rate operation signal and the measured value information of the gas concentration in the flow path at the outlet of the boiler, and the air input to the boiler from the air port 103 and the burner 102 provided in the boiler 101. Has a function of determining which region is obtained by dividing the flow path at the outlet of the boiler into 12 parts.

  In FIG. 5 (b), an example in which an oxygen (O2) concentration measuring device is disposed as a concentration measuring device 154 for measuring the gas concentration in the exhaust gas at the boiler outlet has been described. However, as the concentration measuring device 154, an oxygen concentration is provided. A carbon monoxide (CO) concentration measuring device may be arranged in place of the measuring device. In this case, the area of the flow path at the boiler outlet where the air flow rate supplied from A of the air port 103 reaches is determined to be a place where the CO concentration has decreased when the air flow rate of A of the air port 103 is increased.

  FIG. 6 is a diagram for explaining an operation signal generation method in the operation signal generation means 500 provided in the control device 200 of the present embodiment of FIG. In the operation signal generation means 500, as shown in the control device 200 of FIG. 1, the reach area data 16 stored in the reach area database 220 and the state quantities of the thermal power plant 100 stored in the measurement signal database 210 are displayed. An operation signal 17 is generated by calculation using the measurement signal data 3.

  FIG. 6A shows a case where a concentration detector 154 for measuring the CO concentration in the exhaust gas is installed in the flow path at the outlet of the boiler described in FIG. 5 to measure the measured value of carbon monoxide (CO). As described above, in the operation signal generating means 500, in each divided region obtained by dividing the flow path of the boiler outlet into 12, the reach of the air flow rate introduced from the burner 102 installed in the boiler 101 or the air port 103, and the concentration measuring device 154 Are multiplied by the CO concentration measurement value measured by the carbon monoxide concentration measurement device installed in each divided region, and the sum of these is calculated. This sum is defined as the first influence value.

  In the operation signal generation means 500, the thermal power plant is operated by the operation signal generation means 500 using the first influence value so as to increase the air flow rate of the burner 102 or the air port 103 that occupies a large proportion of the first influence value. An operation signal 17 that is a command signal for 100 is calculated and generated.

  FIG. 6A shows a case where the first influence value of the air port B is larger than the first influence value of the air port A among the air ports 103 from A to E. In this case, the operation signal generating means 500 generates the operation signal 17 for increasing the flow rate of air supplied from the air port B.

  Using the method described above, the operation signal generating means 500 calculates and generates the operation signal 17 (air flow rate command value) as a command signal for the thermal power plant 100, thereby reaching a region with a high carbon monoxide concentration. It is possible to increase the air flow rates of the burner 102 and the air port 103 installed in the boiler 101 that supplies air to be supplied.

Thereby, in the boiler 101 of the thermal power plant 100 of the present embodiment, carbon monoxide (CO) and oxygen (O ₂ ) of the supplied air are supplied by supplying air that reaches an area where the concentration of carbon monoxide is high. Since carbon monoxide can be oxidized by reaction, the concentration of carbon monoxide in the exhaust gas discharged from the outlet of the boiler 101 can be reduced.

Further, in FIG. 6B, a concentration detector 154 for measuring the oxygen (O ₂ ) concentration in the combustion gas flowing through the boiler outlet passage described in FIG. 5 is installed to measure the measured value of the oxygen concentration. As shown, in the operation signal generating means 500, the amount of air flow reached to the boiler 101 from the installation burner 102 or the air port 103 and the concentration measurement in each region obtained by dividing the flow path of the boiler outlet into 12 regions. Multiply by the measured value of the oxygen concentration installed in each divided area as the unit 154 and calculate the sum of these. The sum of these is defined as the second influence value.

  In this case, in the operation signal generation unit 500, the operation signal generation unit 500 generates a command signal for the thermal power plant 100 so as to reduce the air flow rate of the burner 102 or the air port 103 that accounts for a large proportion of the second influence value. The operation signal 17 is calculated and generated.

In the combustion gas flowing through the boiler outlet, when a region with a high oxygen (O ₂ ) concentration occurs in each of the divided regions obtained by dividing the flow path at the boiler outlet into 12, the oxygen may be insufficient in other regions. In some cases, the concentration of carbon monoxide (CO) increases in other regions where oxygen is insufficient.

  In addition, if there is a region with a high oxygen concentration, there is a possibility that air is excessively supplied, so there is a cost merit that the power of the fan that supplies air can be reduced by reducing the excessively supplied air. . Therefore, it is better that the region having a high oxygen concentration is as small as possible.

Therefore, the operation signal generation unit 500 uses the second influence value to calculate and derive the operation signal 17 serving as a command signal for the thermal power plant 100 by the operation signal generation unit 500, thereby biasing the O ₂ concentration distribution. Therefore, the boiler 101 of the thermal power plant 100 of this embodiment not only suppresses generation of carbon monoxide in the combustion gas discharged from the boiler 101 but also reduces fan power. Energy saving effect is obtained.

  FIG. 7 is a flowchart for explaining the calculation procedure of the learning algorithm in the learning means 600 that is the calculation device provided in the control apparatus 200 of FIG. 1 according to the present embodiment, and the operation method learning step in the flowchart shown in FIG. The operation of 1040 is shown in detail.

  Although FIG. 7 shows an example in which reinforcement learning is used as the learning algorithm, various optimization techniques such as a genetic algorithm and an annealing method may be used for the learning algorithm of the present embodiment. it can.

  As shown in the flowchart of FIG. 7, the learning algorithm calculated by the learning means 600 included in the control device 200 of FIG. 1 includes steps 1100, 1110, 1120, 1130, 1140, 1150, 1160, 1170, 1180, 1190. Operate with a combination of steps.

  First, in step 1100 for setting the initial value of the model input at random, the initial value of the model input 9 is set at random.

  Next, in step 1110 for calculating the model output, the model input 9 set in step 1110 is input to the model 700 provided in the control device 200 of FIG. 1, and simulation calculation of the thermal power plant 100 is performed using the model 700. Model output 10 is obtained.

  Next, in step 1120 of initial value determination, the model output 10 obtained in step 1110 for calculating the model output is compared with the target value of the model output, and if the model output 10 has achieved the model output target value. Returning to step 1100 for calculating the model output, if the model output 10 has not achieved the model output target value, the process proceeds to step 1130 for determining the model input change width.

  In the next step 1130 for determining the model input change width, the learning information 600 stored in the learning information database 260 provided in the control device 200 of FIG. 1 is stored in the learning means 600 provided in the control device 200 of FIG. The model input change width Δa is determined using this information.

In the next step 1140 for determining the model input, the learning information data 12 learned by the learning means 600 using the equation (1) is obtained.
a (t + 1) = a (t) + Δa (1)
Here, a is an operation.

  In the next step 1150 for calculating the model output, the model input 9 generated by the learning means 600 obtained in step 1140 for determining the model input is input to the model 700 provided in the control device 200 of FIG. The model output 10 is obtained by performing a simulation calculation of the thermal power plant 100 in FIG.

In the next step 1160 for calculating the evaluation value, the evaluation value calculating means provided in the control device 200 of FIG. 1 based on the model output 10 simulated by the model 700 obtained in step 1150 for calculating the model output. According to 800, the evaluation value 11 is calculated using the formula (2).
Q (s, a) = E (Σγ k r t + k + 1) ··· (2)
(The range for calculating the sum with Σ is from k = 0 to k = ∞)
Here, Q (s, a) is the value of selecting the operation a in the state s, γ (0 ≦ γ <1) is a discount rate, and γt is a reward at time t. The value Q (s, a) is determined by the sum of time, which is meaningful.

  The state s means, for example, the condition of the air flow rate, and the operation a means, for example, an increase in the air flow rate or a decrease in the air flow rate. Further, the value Q (s, a) means that, for example, if the value is large, the concentration of carbon monoxide decreases, and if the value is small, the concentration of carbon monoxide increases.

  In many cases, the response when the thermal power plant 100 is actually operated using the operation a, that is, the result learned by the learning means 600 of the control device 200 is often accompanied by a delay time.

  Therefore, it is more realistic to determine the value based on the sum of rewards given in the future, instead of determining the value based on the reward immediately after the operation a. In addition, by introducing the discount rate γ, the evaluation value calculation of the control device 200 that calculates the evaluation value based on the model output 10 of the model 700 is set by increasing the reward obtained immediately after the operation a. The evaluation value 11 considering the responsiveness can be calculated by the means 800.

In addition, as a method for setting the reward γ _t set by the evaluation value calculation means 800, a reward is given only when the model output 10 reaches its target value. The closer the model output 10 and the target state are, the larger the reward value is. There is a way to do it.

  Furthermore, the evaluation value 11 can be calculated by applying the method shown in FIG.

A model output 10 obtained by simulating the thermal power plant 100 using the model 700 includes a CO concentration distribution and an O ₂ concentration distribution in the exhaust gas in the flow path at the boiler outlet. The influence values shown in FIG. 5 can be calculated by multiplying the distribution of the CO concentration and the O ₂ concentration by the region in the flow path of the boiler outlet where the air supplied from each air port installed in the boiler reaches.

  In the evaluation value calculation unit 800, the evaluation value is set so as to increase as the first influence value increases, similar to the one used when the operation signal generation unit 500 calculates. The evaluation value can also be set to be smaller as the second influence value is larger.

In the next step 1170 for updating the learning parameter, the learning means 600 provided in the control device 200 of FIG. 1 is used, based on the evaluation value calculated in the step 1180 for determining the end of the episode, using equation (3). The parameter of the agent is updated by calculation, and the updated result is stored in the learning information database 260 of the control device 200.
Q (s _t , a _t ) ← Q (s _t , a _t ) + α (r _t + γmaxQ (s _{t + 1} , a _{t + 1} ) −Q (s _t , a _t ))
... (3)
Here, α (0 ≦ α <1) is a learning rate.

  In step 1180 of determining the end of the episode, if the model output 10 of the simulation calculation by the model 700 calculated in step 1150 of calculating the model output has achieved the model output target value, the process proceeds to step 1190 of determining the end of learning. If the model output 10 has not achieved the model output target value, the process returns to step 1130 for determining the model input change width. Note that the end of the episode is determined by the learning means 600.

As described above, in the learning algorithm in the learning unit 600 of the control device 200 described with reference to the flowchart of FIG. 7, the model input 9 that is learned by the learning unit 600 and input to the model 700 is included in the combustion gas in the flow path of the boiler outlet. By learning with this learning means 600, including the CO concentration and O ₂ concentration, an operation method for reducing the CO concentration in the combustion gas discharged from the boiler can be learned.

  Here, in the learning means 600, when the evaluation value is set to be larger as the first influence value is larger, the learning means 600 is burner 102 of the boiler 101 that supplies the air that reaches the low CO concentration region. An operation method for increasing the air flow rate of the air port 103 can be learned.

Similarly, in the learning unit 600, when the evaluation value is set to be smaller as the second influence value is larger, the burner 102 of the boiler 101 in which the learning unit 600 does not bias the O ₂ concentration distribution. The method of operating the air flow rate of the air port 103 can be learned.

  Next, the image which displays the output signal from the data transmission / reception processing part 930 of the maintenance tool 910 which comprises the control apparatus of the thermal power plant 100 which is one Example of this invention of FIG. 1 using FIG.8 and FIG.9. An example of a screen displayed on the display device 950 will be described.

8 is similar to the one shown in FIG. 5, the CO concentration and the O ₂ concentration are shown as the gas concentration in the combustion gas in each divided region obtained by dividing the flow path at the boiler outlet of the boiler 101 into 12 in the image display device 950. The reaching area where the air introduced from the air port 103 of the boiler 101 reaches each divided area obtained by dividing the flow path of the boiler outlet into 12 is displayed.

  In FIG. 8, the arrival area at the boiler outlet of the air introduced from the air port 103 is displayed, but the arrival area of the air introduced from the burner 102 of the boiler 101 is displayed, You may display combining the reach | attainment area | region in the boiler exit of the air thrown in from the airport 103 arbitrarily.

9 is similar to the one shown in FIG. 8, the CO concentration and the O ₂ concentration as the gas concentration in the combustion gas in each divided region obtained by dividing the flow path at the boiler outlet of the boiler 101 into 12 in the image display device 950, FIG. 6 is a diagram obtained by multiplying an arrival area where air introduced from the air port 103 of the boiler 101 reaches each divided area obtained by dividing the flow path of the boiler outlet into 12 parts, a CO concentration distribution of the gas concentration, and an arrival area; The influence values shown in the explanation of are respectively displayed.

  By the way, the adjustment of the air flow rate supplied from the burner 102 and the air port 103 of the boiler 101 may be performed manually. In this case, by displaying the screens of FIG. 8 and FIG. 9 on the image display device 950, it is possible to support the adjustment work of each air flow rate supplied from the burner 102 and the air port 103 of the boiler 101, thereby the burner 102 of the boiler 101. The effect of shortening the period required for the adjustment work of the air flow rate supplied from the air port 103 can be obtained.

  According to the embodiment of the present invention described above, when there is a bias in the oxygen concentration distribution in the exhaust gas from the boiler outlet that uses coal as the fuel, the necessary air flow rate is supplied to the region where the oxygen concentration is low, It is possible to realize a thermal power plant control apparatus and a thermal power plant control method that effectively reduce the carbon monoxide concentration.

  Moreover, since the air flow rate injected into the boiler can be reduced to a flow rate necessary for combustion of the boiler fuel, the power consumed in the thermal power plant can be saved by reducing the fan power for supplying air.

  FIG. 10 is a control block diagram showing the overall configuration of a control apparatus for a thermal power plant according to another embodiment of the present invention.

  The control apparatus for a thermal power plant that is another embodiment of the present invention shown in FIG. 10 is the configuration of the control apparatus and basic device for the thermal power plant that is the embodiment of the present invention shown in FIG. In addition, since the control method is common, description of the device configuration and control method common to both will be omitted, and different parts will be described below.

  In FIG. 10, the control device 200 provided in the control device of the thermal power plant 100 provided with the boiler is distributed as an arithmetic device provided in the control device 200 that controls the thermal power plant 100 of the embodiment of FIG. An estimation means 350 and a distribution information database 270 are added.

The distribution estimation means 350 performs an estimation operation based on the measurement signal data 4 stored in the measurement value signal database 210 and the numerical analysis data 7 stored in the numerical analysis result database 230 to determine the flow path of the boiler outlet. Distribution information 19 including oxygen (O ₂ ) concentration distribution and carbon monoxide (CO) concentration distribution in the exhaust gas is generated.

The distribution information 19 including the O ₂ concentration distribution and the CO concentration distribution estimated and calculated by the distribution estimating means 350 is stored in the distribution information database 270.

In the control apparatus 200 of the previous embodiment shown in FIG. 1, the boiler in which the concentration measuring device is arranged for the measured values of O ₂ concentration and CO concentration measured by the concentration measuring device shown in FIG. This is a representative value of the divided area of the outlet flow path.

  Further, as shown in FIG. 6, the operation signal generation means 500 provided in the control device 200 calculates the influence value by assuming that the concentration in the exhaust gas in the divided region of the flow path at the boiler outlet is constant as a representative value. Yes.

However, since the concentration in the exhaust gas in the divided region of the flow path at the boiler outlet is not constant and a concentration distribution is actually formed, the distribution estimating means 350 of the control device 200 does not have the exhaust gas in the flow path at the boiler outlet. The distribution information 19 including the estimated O ₂ concentration distribution and the CO concentration distribution is generated by providing a function of estimating the distribution state of the O ₂ concentration and the distribution state of the CO concentration.

  Further, in the operation signal generating means 500 installed in the control device 200 of the thermal power plant 100 of this embodiment shown in FIG. 10, the operation signal generating means 500 of the control device 200 described in the previous embodiment of FIG. Not only the operation signal 17 for the thermal power plant 100 is generated by the same configuration and method, but also the operation signal 17 for the thermal power plant 100 to be controlled using the distribution information data 20 stored in the distribution information database 270. Is formed to produce

  That is, the distribution information data 20 is added to the input signals to the first correction signal generation unit 520 and the second correction signal generation unit 530 constituting the operation signal generation unit 500 shown in FIG. It is configured.

FIG. 11 is a diagram for explaining the function of the distribution estimating means 350 constituting the arithmetic unit of the control device 200 for the thermal power plant according to another embodiment shown in FIG. Here, a case where the O ₂ concentration distribution in the boiler outlet flow path of the boiler 101 is estimated using the measurement signal data 4 stored in the measurement signal database 210 will be described as an example.

As shown in FIG. 11 (a), the O2 concentration meter 154 for measuring the O ₂ concentration of the installed in the exhaust gas in the divided region of the boiler outlet channel divided into 12 of the boiler 101, the divided regions of the boiler outlet The O ₂ concentration in the exhaust gas flowing down is measured.

Figure 11 (a), the one of the divided regions divided into 12 boiler outlet passage, upper left 4 _O disposed in the region ₂ concentration measuring instrument 154a, 154b, 154c, _{O 2} concentration in the exhaust gas measured respectively 154d Regarding the measured values, the average value, the dispersion value, the maximum value, and the minimum value of the measured values of the O ₂ concentration in the exhaust gas are shown in FIG.

As shown in FIG. 11B as a trend graph, the value of the O ₂ concentration in the exhaust gas measured by the O ₂ concentration measuring device 154 changes with time.

  In FIG. 5 and FIG. 6 showing the function of the device according to the previous embodiment of FIG. 1, for example, the average value of the measured value of the exhaust gas concentration at the boiler outlet is representative of the region obtained by dividing the flow path at the boiler outlet into a plurality of parts. The result of smoothing the measured value, such as a value, is used as a representative value of the divided area.

On the other hand, in the distribution estimation means 350 in the control device 200 of the present embodiment, as shown in FIG. 11B, the average value, dispersion value, maximum value of the measured value of the exhaust gas concentration in the boiler outlet flow path, The minimum value is used to estimate the concentration distribution of the exhaust gas, for example, the O ₂ concentration.

First, the measured value a of the O ₂ concentration in the exhaust gas measured by the O ₂ concentration measuring devices 154a, 154b, 154c, 154d arranged in the four regions at the upper left among the divided regions obtained by dividing the boiler outlet flow path into twelve, When the measurement values a and b are compared with the measurement values c and d among b, c and d, it can be seen that the average value of the measurement values a and b is lower than the average value of the measurement values c and d. .

Based on these measurement signal data 4, in the distribution estimation means 350, among the divided areas obtained by dividing the boiler outlet flow path, the O ₂ concentration measuring device 154a in which the low O ₂ concentration area detects the measurement values a and b. 154b are determined to be within the installed area.

Next, the distribution estimation means 350 uses the variance of the measurement value a and the measurement value b to determine which part of the region where the O ₂ concentration measuring devices 154a and 154b are installed has a low O ₂ concentration.

When the variance value of the measurement value a and the measurement value b is smaller than a predetermined threshold value, for example, it is determined that the O ₂ concentration in the region where the O ₂ concentration measuring devices 154a and 154b are arranged is low, and the measurement value When the variance value of a and the measurement value b is larger than the threshold value, for example, it is determined that the O ₂ concentration at the boundary between the regions where the O ₂ concentration measuring devices 154a and 154b are arranged is low.

This is because even if the air flow rate supplied from the burner 102 and the air port 103 of the boiler 101 is controlled to be constant, the air flow rate actually fluctuates within a certain range. For example, the concentration distribution of, for example, the O ₂ concentration in the exhaust gas is a determination method using the fact that it fluctuates within a certain range.

And the distribution estimating unit 350, if the variance value of 12 divided measured in particular O ₂ concentration measuring instrument installed in the divided regions the O ₂ concentration in the boiler outlet passage is smaller than the threshold, the O ₂ location of the divided region density instrument is disposed is always since it can be determined that overlaps the O ₂ concentration lower region, a lower O ₂ concentration in the region of the point where the O ₂ concentration measuring device is arranged Judge.

On the other hand, when the dispersion value of the O ₂ concentration measured by a specific O ₂ concentration measuring device is larger than the threshold value, the O ₂ concentration at the location of the divided area where the O ₂ concentration measuring device is arranged becomes high. It means that it is getting lower.

Therefore, it is determined that there is a place with a low O ₂ concentration in a region slightly shifted from the divided region where the O ₂ concentration measuring device is arranged.

In addition, the distribution estimation means 350 of the present embodiment estimates the CO concentration and O ₂ concentration distribution in the exhaust gas in the boiler outlet channel using the numerical analysis data 7 stored in the numerical analysis result database 230. You can also.

In the operation signal generation means 500 provided in the control apparatus 200 of the present embodiment, the operation is performed using the concentration distribution information of the CO concentration and the O ₂ concentration in the exhaust gas of the boiler outlet channel estimated by the distribution estimation means 350. Signal 17 is calculated.

  That is, the CO concentration measurement value and the O2 concentration measurement value in the control device 200 of the previous embodiment shown in FIG. 6 are replaced with the CO concentration distribution estimated value and the O2 concentration distribution estimated value, respectively, and the influence value is calculated. .

  Also in the calculation procedure of the learning algorithm in the learning means 600 provided in the control device 200 of this embodiment, the evaluation of the control device 200 is performed in step 1160 for calculating the evaluation value of the flowchart in FIG. 7 showing the calculation procedure of the learning algorithm. When the evaluation value is calculated by the value calculation means 800, the influence value described above can also be used.

  In this case, the CO concentration distribution estimated value and the distribution information of the O2 concentration distribution estimated value were used as compared with the previous embodiment using only the measured value information of the CO concentration measured value and the O2 concentration measured value. In the case of the present embodiment, since the estimated CO concentration distribution value and the estimated O2 concentration distribution value in the exhaust gas close to the actual machine can be obtained, further reduction effect of CO concentration in the exhaust gas can be realized.

  This is estimated by the distribution estimation means 350 in comparison with the case where the concentration distribution in the exhaust gas of the boiler outlet flow path grasped in the control device 200 uses the representative value of the divided area obtained by dividing the boiler outlet flow path into 12 parts. When the concentration distribution in the exhaust gas is used, it is closer to the actual machine, so that the air flow rate for more appropriately adjusting the air flow rate supplied from the burner 102 of the boiler 101 and the air port 103 in order to reduce the CO concentration. This is because the command signal can be generated.

  FIG. 12 is an operation flowchart of the control apparatus for the thermal power plant according to another embodiment of the present invention shown in FIG.

  The flowchart of FIG. 12 is obtained by adding a distribution estimation step 1060 between the model construction step 1020 and the supply location estimation step 1030b in the flowchart shown in FIG. 3, and the other steps are the flowchart of FIG. Is the same.

  In this distribution estimation step 1060, as described above, the gas concentration distribution (O2 concentration distribution, CO concentration distribution) in the exhaust gas in the boiler outlet channel is calculated by the distribution estimation means 350 provided in the control device of FIG. Is estimated.

  When the thermal power plant control device according to another embodiment of the present invention shown in FIG. 10 is used, information stored in the distribution information database 270 can be displayed on the image display device 950. Therefore, when the control device of the thermal power plant that is the previous embodiment shown in FIG. 1 is used, as shown in FIG. 8 and FIG. Although it is divided and displayed every time, if the control device of the thermal power plant according to the present embodiment is used, the boiler outlet gas concentration can be displayed in a concentration distribution state close to that of the actual machine.

According to the above-described embodiment of the present invention, when there is a bias in the O ₂ concentration distribution in the exhaust gas from the boiler outlet that uses coal as the fuel, the necessary air flow rate is supplied to the region where the O ₂ concentration is low to exhaust the boiler exhaust gas. It is possible to realize a thermal power plant control apparatus and a thermal power plant control method that effectively reduce CO in the interior.

  In addition, since the flow rate of air to be introduced into the boiler can be reduced to a flow rate required for combustion of the fuel in the boiler, it is possible to reduce power consumed in the thermal power plant by reducing fan power for supplying air.

  The present invention can be applied to a thermal power plant control apparatus and a thermal power plant control method for reducing the concentration of carbon monoxide discharged from a thermal power plant including a boiler using coal as fuel.

The control block diagram which shows the whole structure of the control apparatus of the thermal power plant which is one Example of this invention. The schematic block diagram which shows the thermal power plant of the control object by the control apparatus of the thermal power plant of the Example shown in FIG. The flowchart which shows the procedure of control by the control apparatus of the thermal power plant of the Example shown in FIG. The control block diagram which shows the structure of the operation signal production | generation means in the control apparatus of the thermal power plant of the Example shown in FIG. Explanatory drawing of the function of the reach | attainment area estimation means in the control apparatus of the thermal power plant of the Example shown in FIG. Explanatory drawing of the production | generation method of the operation signal by the operation signal production | generation means in the control apparatus of the thermal power plant of the Example shown in FIG. The flowchart which shows the calculation procedure of the learning algorithm by the learning means in the control apparatus of the thermal power plant of the Example shown in FIG. An example of the display screen by the image display apparatus with which the control apparatus of the thermal power plant of the Example shown in FIG. 1 was equipped. The other example of the display screen by the image display apparatus with which the control apparatus of the thermal power plant of the Example shown in FIG. 1 was equipped. The control block diagram which shows the whole structure of the control apparatus of the thermal power plant which is the other Example of this invention. Explanatory drawing of the function of the distribution estimation means in the control apparatus of the thermal power plant which is the other Example shown in FIG. The flowchart which shows the procedure of control by the control apparatus of the thermal power plant which is another Example shown in FIG.

Explanation of symbols

  100: plant, 200: control device, 201: external input interface, 202: external output interface, 210: measurement signal database, 220: reach area database, 230: numerical analysis result database, 240: operation signal database, 250: control logic Database: 260: Learning information database, 300: Reaching area estimation means, 400: Numerical analysis execution means, 500: Operation signal generation means, 600: Learning means, 700: Model, 800: Evaluation value calculation means, 900: External input device , 901: keyboard, 902: mouse, 910: maintenance tool, 920: external input interface, 930: data transmission / reception processing unit, 940: external output interface, 950: image display device.

Claims (15)

A burner for supplying fuel coal and air to the boiler, and an air port for supplying air to the combustion gas downstream of the flow direction of the combustion gas generated by burning the fuel coal and air supplied from the burner In a control device for a thermal power plant equipped with a boiler, the boiler of the thermal power plant is provided with a measuring device for measuring the oxygen concentration or carbon monoxide concentration of the combustion gas at the outlet of the boiler, and constitutes a control device for the thermal power plant Air supplied to the boiler from the burner or air port based on the calculation of the flow path of air supplied to the boiler from the burner or air port using the physical model inside the controller, which has a physical model that simulates the thermal power plant Numerical analysis execution means for calculating the region where the flow rate reaches the boiler outlet, and obtained from the thermal power plant. Arrival area where the flow rate of air supplied from the burner or Airport to the boiler by means of at least 1-way data among the numerical analysis data obtained by executing measurement signal data or the numerical analysis executing means for estimating the area to reach the boiler outlet The estimated value, the measured value of the carbon monoxide concentration or the measured value of the oxygen concentration of the combustion gas at the outlet of the boiler measured by the measuring instrument, and the supplied air estimated by the reaching region estimating means reach the outlet of the boiler. From the burner or the air port to the boiler so that the flow rate of air reaching the high gas monoxide concentration region or low oxygen concentration region of the combustion gas at the boiler outlet measured by the measuring instrument based on the region estimation result increases. An operation signal generating means for setting the flow rate of air to be supplied. Control device. A burner for supplying fuel coal and air into the boiler, and an air port for supplying air to the combustion gas on the downstream side in the flow direction of the combustion gas generated by burning the fuel coal and air supplied from the burner A control device for a thermal power plant having a measuring instrument for measuring the oxygen concentration or carbon monoxide concentration of combustion gas at the outlet of the boiler in the boiler of the thermal power plant, and constituting a control device for the thermal power plant The flow rate of air supplied from the burner or the air port to the boiler is calculated based on the calculation of the flow path of the air flow supplied from the burner or the air port to the boiler using the physical model that simulates the thermal power plant. Numerical analysis execution means for calculating the area reaching the exit of the plant, and measurement signal data obtained from the thermal power plant And arrival region estimating means air supplied from the burner or airport using at least 1-way data among the numerical analysis data obtained by executing the data or the numerical analysis executing means for estimating the area to reach the outlet of the boiler, Distribution estimation means for estimating the distribution of oxygen concentration or carbon monoxide concentration in the combustion gas at the boiler outlet, and estimation of the distribution of carbon monoxide concentration or oxygen concentration in the combustion gas at the boiler outlet estimated by the distribution estimation means A region having a high carbon monoxide concentration or oxygen in the combustion gas at the boiler outlet measured by the measuring instrument based on the result and the estimation result of the region in which the supplied air estimated by the reaching region estimation means reaches the boiler outlet Set the flow rate of air supplied to the boiler from the burner or air port so that the flow rate of air reaching the low concentration area increases. Control device for a thermal power plant, characterized in that the operation signal generating means and a each provided for. A burner for supplying fuel coal and air to the boiler, and an air port for supplying air to the combustion gas downstream of the flow direction of the combustion gas generated by burning the fuel coal and air supplied from the burner In a control device for a thermal power plant equipped with a boiler, the boiler of the thermal power plant is provided with a measuring device for measuring the oxygen concentration or carbon monoxide concentration of the combustion gas at the outlet of the boiler, and constitutes a control device for the thermal power plant An arrival area estimation means for estimating an area where the air supplied from the burner or air port of the boiler reaches the outlet of the boiler, and measurement of the concentration of carbon monoxide at the outlet of the boiler measured by the measuring instrument Value or the measured value of oxygen concentration and the estimated result of the area where the supplied air estimated by the arrival area estimating means reaches the outlet of the boiler The flow rate of air supplied from the burner or the air port to the boiler is increased so that the flow rate of air reaching the high gas monoxide concentration region or low oxygen concentration region of the combustion gas at the boiler outlet measured by the measuring instrument Operation signal generating means for setting, respectively,
The measuring instrument is arranged so as to measure the measured value of the carbon monoxide concentration or the oxygen concentration in each divided region obtained by dividing the flow passage cross section of the boiler outlet into an arbitrary number of divided regions, and the operation provided in the controller The signal generating means includes a measured value of carbon monoxide concentration or a measured value of oxygen concentration measured by the measuring device arranged for each divided region of the flow passage cross section at the outlet of the boiler, and a boiler burner by the reaching region estimating means or Calculate the first influence value of the carbon monoxide concentration or the second influence value of the oxygen concentration, which is the sum of values obtained by integrating the estimated value of the area where the air supplied from the airport reaches the outlet of the boiler, Increase the air flow rate of the burner or air port that has a large proportion of the first influence value, or increase the air flow rate of the burner or air port that has a large proportion of the second influence value. Control device for a thermal power plant which is characterized by being configured to have a function of controlling so that little of. In the thermal power plant control apparatus according to claim 2, measurement signal data of oxygen concentration or carbon monoxide concentration of combustion gas at the outlet of the boiler obtained from the thermal power plant measured by the measuring instrument in the controller, or The oxygen concentration distribution or monoxide at the boiler outlet using at least one of the numerical analysis data of the oxygen concentration distribution or carbon monoxide concentration distribution of the combustion gas at the outlet of the boiler obtained by executing the numerical analysis execution means. A control apparatus for a thermal power plant, comprising distribution estimation means for estimating a carbon concentration distribution. A burner for supplying fuel coal and air into the boiler, and an air port for supplying air to the combustion gas on the downstream side in the flow direction of the combustion gas generated by burning the fuel coal and air supplied from the burner A control device for a thermal power plant having a measuring instrument for measuring the oxygen concentration or carbon monoxide concentration of combustion gas at the outlet of the boiler in the boiler of the thermal power plant, and constituting a control device for the thermal power plant , An arrival area estimation means for estimating the area where the air supplied from the burner or the air port reaches the outlet of the boiler, and a distribution estimation means for estimating the distribution of oxygen concentration or carbon monoxide concentration of the combustion gas at the outlet of the boiler And a distribution estimation result of the carbon monoxide concentration or oxygen concentration of the combustion gas at the outlet of the boiler estimated by the distribution estimating means, and the Based on the estimation result of the area where the supplied air estimated by the reaching area estimation means reaches the outlet of the boiler, the area where the carbon monoxide concentration of the combustion gas at the boiler outlet measured with the measuring instrument is high or the oxygen concentration is low Operation signal generating means for setting the flow rate of air supplied to the boiler from a burner or an air port so that the flow rate of air reaching the region increases, and the measuring instrument has an arbitrary number of divided regions in the flow path cross section of the boiler outlet The measurement signal of the carbon monoxide concentration or the oxygen concentration is arranged for each divided area divided into two, and the operation signal generating means provided in the controller is arranged for each divided area of the flow passage cross section of the boiler outlet. The measured value of the carbon monoxide concentration or the measured value of the oxygen concentration measured by the measuring instrument provided, and the burner or the air port of the boiler by the arrival area estimation means The first influence value of the carbon monoxide concentration or the second influence value of the oxygen concentration, which is the sum of the values obtained by integrating the estimated values of the areas where the heated air reaches the outlet of the boiler, is calculated, respectively. It has a function to control the air flow rate of the burner or the air port, which has a large proportion of the influence value, or to reduce the air flow rate of the burner or the air port, which has the large proportion of the second influence value. A control device for a thermal power plant. The control apparatus for a thermal power plant according to claim 2, wherein the operation signal generation means provided in the controller is a division in which a flow passage cross section of the boiler outlet estimated by the distribution estimation means is divided into an arbitrary number of divided regions. Sum of the sum of the estimated value of the carbon monoxide concentration or the estimated oxygen concentration of the region and the estimated value of the region where the air supplied from the boiler burner or the air port reaches the outlet of the boiler The first influence value of the carbon monoxide concentration or the second influence value of the oxygen concentration is calculated, respectively, and the air flow rate of the burner or the air port having a large proportion of the first influence value is increased, or It has a function to control so as to reduce the air flow rate of the burner or air port that has a large proportion of the influence value of 2. Control device for a thermal power plant to.   The thermal power plant control apparatus according to claim 5 or 6, wherein the controller has a simple physical model for simply simulating the characteristics of the thermal power plant, and is intended for the simple physical model. Evaluation value calculation means for calculating the first influence value of the carbon monoxide concentration and the second influence value of the oxygen concentration, respectively, and an operation for increasing the first influence value calculated by the evaluation value calculation means Learning means for learning a method or an operation method for reducing the second influence value, wherein the operation signal generating means supplies an air flow rate to the boiler from a burner or an air port based on a learning result by the learning means. The control apparatus of the thermal power plant characterized by comprising so that it may set.   In the control apparatus for a thermal power plant according to claim 1 or 2, the reach region where the air supplied to the boiler from the burner or the air port estimated by the reach region estimation means provided in the controller reaches the outlet of the boiler. A control apparatus for a thermal power plant comprising display means for displaying on a screen.   7. The thermal power plant control apparatus according to claim 5 or 6, wherein display means for displaying on the screen the first influence value or the second influence value calculated by the operation signal generating means provided in the controller. A control device for a thermal power plant, comprising: Fuel gas and air supplied from a burner provided in the boiler are supplied into the boiler, and combustion gas generated by burning the fuel coal and air supplied from the burner in the boiler is generated. In the control method of a thermal power plant that supplies air to the combustion gas from an air port provided in the boiler downstream in the flow direction, the oxygen concentration in the combustion gas at the boiler outlet is measured by a measuring instrument provided at the boiler outlet of the thermal power plant. Alternatively, a physical model for simulating a thermal power plant is measured by means of numerical analysis execution means provided in a controller for measuring the carbon monoxide concentration and controlling the thermal power plant, and a boiler is used from the burner or the air port using the physical model. Based on the calculation of the path of the air flow rate to be supplied to the burner or the air by the reach area estimation means provided in the controller In the combustion gas at the boiler outlet measured by the measuring instrument obtained from the thermal power plant by the reaching area estimating means provided in the controller, the area where the air flow rate supplied to the boiler from the boiler reaches the boiler outlet is calculated. The flow rate of air supplied to the boiler from the burner or the air port using at least one of the measurement signal data of the oxygen concentration or carbon monoxide concentration or the numerical analysis data obtained by executing the numerical analysis execution means is the boiler outlet. estimates the area to reach, the measuring instrument of the measuring values or the oxygen concentration of the carbon monoxide concentration of the combustion gas outlet of the boiler is measured by the measuring value and the arrival area estimated by the operation signal generating means provided in the controller Estimated results of the area where the air supplied from the burner or air port estimated by the means reaches the outlet of the boiler The air flow rate supplied to the boiler from the burner or the air port is set so that the air flow rate reaching the high carbon monoxide concentration region or the low oxygen concentration region in the combustion gas at the boiler outlet measured by the measuring instrument is increased. And controlling the thermal power plant. Fuel coal and air supplied from a burner provided in the boiler into the boiler, and the fuel coal and air supplied from the burner are combusted in the boiler to generate combustion gas, and the flow direction of the generated combustion gas In a control method of a thermal power plant that supplies air to the combustion gas from an air port provided in the boiler on the downstream side, the oxygen concentration in the combustion gas at the outlet of the boiler or the concentration is measured by a measuring instrument provided at the boiler outlet of the thermal power plant. It has a physical model that simulates the thermal power plant by means of numerical analysis execution means provided in the controller that measures the carbon oxide concentration and controls the thermal power plant, and supplies it to the boiler from the burner or air port using the physical model Based on the calculation of the air flow path to be performed, it is possible to determine whether the burner or the air port The region where the air flow rate supplied to the boiler reaches the boiler outlet is calculated, and the oxygen concentration in the combustion gas at the boiler outlet measured by the measuring device obtained from the thermal power plant by the reaching region estimation means provided in the controller or The flow rate of air supplied from the burner or the air port to the boiler reaches the boiler outlet using at least one of the measurement signal data of the carbon monoxide concentration or the numerical analysis data obtained by executing the numerical analysis execution means. The region is estimated, the distribution estimation means provided in the controller estimates the oxygen concentration or carbon monoxide concentration distribution in the combustion gas at the outlet of the boiler, and the operation signal generation means provided in the controller estimates the distribution. The carbon monoxide concentration or oxygen concentration distribution estimation result estimated by the means and the estimated area estimation means Reaching a region with a high carbon monoxide concentration or a region with a low oxygen concentration in the combustion gas at the boiler outlet measured by the measuring instrument based on the estimated result of the region where the air reaches the boiler outlet A control method for a thermal power plant, characterized by setting and controlling an air flow rate supplied to a boiler from a burner or an air port so that the air flow rate increases. Fuel gas and air supplied from a burner provided in the boiler are supplied into the boiler, and combustion gas generated by burning the fuel coal and air supplied from the burner in the boiler is generated. In a control method for a thermal power plant that supplies air to the combustion gas from an air port provided in a boiler on the downstream side in the flow direction ,
Carbon monoxide concentration or oxygen concentration in the combustion gas for each divided region of the boiler outlet by measuring the section of the flow path at the boiler outlet of the thermal power plant into an arbitrary number of divided regions and equipped for each divided region The measured value of carbon monoxide concentration or the measured value of oxygen concentration for each divided area at the outlet of the boiler by the operation signal generating means provided in the controller, and supplied from the burner or the air port of the boiler by the arrival area estimating means The first influence value of the carbon monoxide concentration or the second influence value of the oxygen concentration, which is the sum total of the estimated value of the region where the air reaches the outlet of the boiler, is obtained, and occupies this first influence value Increase the air flow rate of the burner or air port that has a large proportion, or decrease the air flow rate of the burner or air port that has a large proportion of the second influence value. The measured value of the carbon monoxide concentration or the measured value of the oxygen concentration of the combustion gas at the outlet of the boiler measured by the measuring instrument by the operation signal generating means provided in the controller and the estimated value by the reaching region estimating means A region where the carbon monoxide concentration in the combustion gas at the boiler outlet measured by the measuring instrument is low or the oxygen concentration is low A control method for a thermal power plant, characterized by setting and controlling an air flow rate supplied to a boiler from a burner or an air port so that an air flow rate reaching an area increases .   12. The thermal power plant control method according to claim 11, wherein a physical model for simulating the thermal power plant is internally provided by means of numerical analysis execution means provided in a controller for controlling the thermal power plant, and the physical model is used. The oxygen concentration distribution or carbon monoxide concentration distribution at the boiler outlet is calculated, and the oxygen concentration in the combustion gas at the boiler outlet measured by the measuring instrument obtained from the thermal power plant by the distribution estimation means provided in the controller is calculated. Oxygen concentration distribution or monoxide at the boiler outlet using at least one of measurement signal data of carbon oxide concentration or oxygen concentration distribution data or carbon monoxide concentration distribution data obtained by executing the numerical analysis execution means. A control method for a thermal power plant characterized by estimating a carbon concentration distribution. Fuel coal and air supplied from a burner provided in the boiler into the boiler, and the fuel coal and air supplied from the burner are combusted in the boiler to generate combustion gas, and the flow direction of the generated combustion gas In the control method of a thermal power plant that supplies air to the combustion gas from an air port provided in the boiler on the downstream side, the flow path cross section of the boiler outlet of the thermal power plant is divided into an arbitrary number of divided regions and divided into divided regions. measured value or the oxygen concentration of the carbon monoxide concentration in each divided region of the boiler outlet by carbon monoxide measured concentration or the oxygen concentration, the operation signal generation means provided to the controller in the combustion gas by the measuring instrument with the And the estimated value of the area where the air supplied from the boiler burner or air port by the arrival area estimation means reaches the outlet of the boiler. The first influence value of the carbon monoxide concentration or the second influence value of the oxygen concentration is obtained, and the air flow rate of the burner or the air port having a large proportion of the first influence value is increased, or the second influence value is obtained. Control is made to reduce the air flow rate of the burner or air port that accounts for a large percentage of the value, and the distribution estimation means provided in the controller estimates the distribution of oxygen concentration or carbon monoxide concentration in the combustion gas at the outlet of the boiler. The carbon monoxide concentration or oxygen concentration distribution estimation result estimated by the distribution estimation means by the operation signal generation means provided in the controller and the supplied air estimated by the arrival area estimation means reach the outlet of the boiler A region having a high carbon monoxide concentration in the combustion gas at the boiler outlet measured by the measuring instrument based on the estimation result of the reaching region of the region to be The method of thermal power plant and to control by setting the air flow rate supplied from the burner or airport to the boiler so that the air flow to reach the region of low oxygen concentration is increased. 15. The thermal power plant control method according to claim 14, wherein a physical model simulating a thermal power plant provided in a controller for controlling the thermal power plant is subjected to monoxide oxidation by an evaluation value calculating means provided in the controller. An operation in which the first influence value of the carbon concentration and the second influence value of the oxygen concentration are calculated, and the first influence value calculated by the evaluation value calculating means is increased by the learning means provided in the controller. how to learn, or the second impact value learn how to operate decreases, the air supplied from the burner or Airport to the boiler on the basis of the said operating signal generating means provided in the controller the learning result by said learning means A control method for a thermal power plant characterized by setting a flow rate.

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