JP2019100669A - Auxiliary machine power determining device, plant, auxiliary machine power determining method, and program - Google Patents

Abstract

To provide an auxiliary machine power determining device that can optimize power of an auxiliary machine while taking account of states of multiple auxiliary machines, and to provide a plant, an auxiliary machine power determining method, and a program.SOLUTION: An auxiliary machine power determining device for determining power of multiple auxiliary machines in a plant having the multiple auxiliary machines includes a determining unit for determining power of a second auxiliary machine that is one of the multiple auxiliary machines based on a state quantity of the plant which influences on a first auxiliary machine that is one of the multiple auxiliary machines, to optimize power of the auxiliary machines.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an accessory power determination device that determines the power of a plurality of accessories in a plant having a plurality of accessories, the plant, a method of determining accessory power, and a program.

In the power generation plant, there are a method of improving the efficiency of the power generation equipment and a method of reducing the auxiliary power as methods of increasing the actual power generation amount. That is, in the power plant, it is possible to expect an increase in the substantial amount of generated power by improving the efficiency of the auxiliary equipment.
The power plant is provided with a plurality of accessories such as a cooling tower fan and a circulating water pump. The power of each accessory can be individually optimized based on the amount of state related to the purpose of the accessory. For example, the power of the fan of the cooling tower can be optimized by calculating the necessary heat release based on the load of the turbine, the outside air temperature, and the outside air humidity. Also, for example, the power of the circulating water pump can be optimized by calculating an appropriate concentration factor based on the load of the turbine and the water quality of the makeup water.

  Patent Document 1 discloses a technique for improving the efficiency of the rotational speed of a cooling tower fan and a cooling water pump in an air conditioning system. Moreover, the technique regarding the number control of the heat-source equipment in an air-conditioning system is disclosed by patent document 2. FIG.

JP 2008-256258 A JP, 2012-112649, A

By operating the auxiliary machine, various state quantities in the plant change. Therefore, changing the power of a certain device may change the amount of state used to determine the power of another accessory. For example, when the power of the circulating water pump is changed, the flow velocity of the circulating water changes, and the amount of heat exchange per unit time changes.
Therefore, when the individual accessories are optimized based on the individual state quantities, the plurality of accessories may not be optimally controlled as a whole.
An object of the present invention is to provide an auxiliary machine power determination device, a plant, an auxiliary machine power determination method, and a program for optimizing the power of an auxiliary machine in consideration of the states of a plurality of auxiliary machines.

  According to a first aspect of the present invention, an accessory power determination apparatus is an accessory power determination apparatus for determining power of the plurality of accessories in a plant having a plurality of accessories, wherein the plurality of accessories is determined. And a determination unit that determines the power of a second accessory, which is one of the plurality of accessories, based on the state quantity of the plant that affects the first accessory, which is one of the above.

  According to a second aspect of the present invention, in the accessory power determination device according to the first aspect, the determination unit is configured to minimize the total power of the first accessory and the second accessory. Alternatively, the power may be determined.

  According to a third aspect of the present invention, in the accessory power determination device according to the first aspect, the determination unit determines the power such that the actual selling price of the plant is maximized. May be there.

  According to a fourth aspect of the present invention, in the auxiliary power determination device according to any one of the first to third aspects, the first auxiliary device or the second auxiliary device is a circulating water of the plant. It may be a pump that pumps water of the system.

  According to a fifth aspect of the present invention, in the accessory power determination device according to any one of the first to fourth aspects, the first accessory or the second accessory is provided in the plant. It may be a fan of a cooling tower.

  According to a sixth aspect of the present invention, a plant includes: a plurality of accessories including a first accessory and a second accessory; a state quantity affecting the first accessory; A sensor for measuring a state amount affecting an accessory and an accessory power determination device according to any one of the first to fifth aspects are provided.

  According to a seventh aspect of the present invention, an accessory power determination method is an accessory power determination method for determining power of the plurality of accessories in a plant having a plurality of accessories, wherein the plurality of accessories are determined. Determining the power of a second accessory, which is one of the plurality of accessories, based on a state quantity of the plant that affects the first accessory, which is one of the two.

  According to an eighth aspect of the present invention, there is provided a computer readable storage medium storing a computer program product for determining power of a plurality of auxiliaries in a plant having a plurality of auxiliaries according to a first auxiliaries as one of the plurality of auxiliaries Determining the power of a second accessory, which is one of the plurality of accessories, based on the state quantities of the plant that affect the

  According to at least one of the above aspects, the accessory power determination device can optimize the power of the accessory in consideration of the states of the plurality of accessories.

It is a schematic block diagram showing composition of a power plant concerning one embodiment. It is a schematic block diagram which shows the structure of the accessory control device which concerns on one Embodiment. It is a figure which shows the example of the relationship between the motive power of a 3rd water supply pump, and the motive power of a fan. It is a flowchart which shows operation | movement of the accessory control device which concerns on one Embodiment. It is a schematic block diagram which shows the structure of the accessory control device which concerns on one Embodiment. It is a flowchart which shows operation | movement of the accessory control device which concerns on one Embodiment. It is a schematic block diagram which shows the structure of the accessory control device which concerns on one Embodiment. It is a flowchart which shows operation | movement of the accessory control device which concerns on one Embodiment. It is a schematic block diagram showing composition of a computer concerning at least one embodiment.

First Embodiment
Hereinafter, embodiments will be described in detail with reference to the drawings.

<< Configuration of water treatment system >>
FIG. 1 is a schematic block diagram showing a configuration of a power plant according to an embodiment.
The power generation plant 10 includes a boiler 11, a steam turbine 12, a generator 13, a condenser 14, a pure water device 15, a cooling tower 16, a steam circulation line 101, a first supply line 102, a first drain line 103, a first medicine. The injection line 104, the cooling water circulation line 105, the second supply line 106, the second drainage line 107, the second chemical injection line 108, the drainage processing device 109, the accessory control device 110, the environment measuring device 111, and the operation monitoring device 112 .

The boiler 11 evaporates water to generate steam.
The steam turbine 12 is rotated by the steam generated by the boiler 11.
The generator 13 converts the rotational energy of the steam turbine 12 into electric power.
The condenser 14 exchanges heat between the steam discharged from the steam turbine 12 and the cooling water to return the steam to water.
The pure water device 15 generates pure water.

  The cooling tower 16 cools the cooling water heat-exchanged by the condenser 14. The cooling tower 16 is provided with a fan 161 for promoting evaporation of the cooling water and a first power meter 162 for measuring the power consumption of the fan 161. The fan 161 is configured to be able to adjust the air volume by number control or inverter control. The first power meter 162 transmits fan power which is the measured power consumption to the accessory control device 110.

  The steam circulation line 101 is a line that circulates water and steam to the steam turbine 12, the condenser 14, and the boiler 11. A first feed pump 1011 is provided between the condenser 14 and the boiler 11 in the steam circulation line 101. The first feed water pump 1011 pumps water from the condenser 14 to the boiler 11.

  The first supply line 102 is a line for supplying pure water generated by the pure water device 15 to the steam circulation line 101. The first supply line 102 is provided with a second water supply pump 1021. The second feed pump 1021 is used when the condenser 14 is filled with water. During operation, the water in the first supply line 102 is pumped from the deionizer 15 toward the condenser 14 by the pressure reduction of the condenser 14.

The first drainage line 103 is a line for discharging a part of the water circulating in the steam circulation line 101 from the boiler 11 to the drainage treatment device 109.
The first chemical injection line 104 is a line for supplying a chemical such as an anticorrosive agent, a scale inhibitor, and a slime control agent to the steam circulation line 101. The first medicine injection line 104 includes a first medicine tank 1041 for storing medicines, and a first medicine injection pump 1042 for supplying medicine from the first medicine tank 1041 to the vapor circulation line 101.

The cooling water circulation line 105 is a line for circulating cooling water to the condenser 14 and the cooling tower 16. In the cooling water circulation line 105, a third water supply pump 1051, a cooling water quality sensor 1052, a circulating water amount sensor 1053, a cooling tower inlet water temperature sensor 1054, a cooling tower outlet water temperature sensor 1055, and a second power meter 1056 are provided. The third water supply pump 1051 pumps cooling water from the cooling tower 16 to the condenser 14.
The cooling water quality sensor 1052 detects the quality of the cooling water circulating in the cooling water circulation line 105. Examples of water quality detected by the sensor include conductivity, pH value, salt concentration, metal concentration, COD (Chemical Oxygen Demand), BOD (Biochemical Oxygen Demand), microorganism concentration, silica concentration, and a combination thereof. It can be mentioned. The cooling water quality sensor 1052 outputs a circulating water quality index value indicating the detected water quality to the accessory control device 110. The circulating water amount sensor 1053 detects the flow rate of the cooling water circulating in the cooling water circulation line 105. The circulating water amount sensor 1053 outputs the circulating water amount indicating the detected water amount to the accessory control device 110. Cooling tower inlet water temperature sensor 1054 detects the temperature of the cooling water circulating in cooling water circulation line 105. The cooling tower inlet water temperature sensor 1054 outputs the circulating water temperature indicating the detected temperature to the accessory control device 110. The second power meter 1056 measures the power consumption of the third water supply pump 1051. The second power meter 1056 outputs pump power indicating the measured power consumption to the accessory control device 110.

The second replenishment line 106 is a line for supplying the raw water withdrawn from the water source to the cooling water circulation line 105 as makeup water. In the second supply line 106, a fourth water supply pump 1061 and a supply water quality sensor 1062 are provided. The fourth feed pump 1061 pumps makeup water from the water source toward the cooling tower 16. The replenishment water quality sensor 1062 outputs a replenishment water quality index value indicating the detected water quality to the accessory control device 110.
The second drainage line 107 is a line for discharging a part of the water circulating in the cooling water circulation line 105 to the drainage treatment device 109. The second drainage line 107 is provided with a blow valve 1071 and a drainage quality sensor 1072. The blow valve 1071 limits the amount of waste water blown from the cooling water circulation line 105 to the waste water treatment apparatus 109.

  The second chemical injection line 108 is a line for supplying a drug to the cooling water circulation line 105. The second medicine injection line 108 includes a second medicine tank 1081 for storing medicines, and a second medicine injection pump 1082 for supplying medicine from the second medicine tank 1081 to the cooling water circulation line 105.

  The waste water treatment apparatus 109 injects an acid, an alkali, a coagulant, or another chemical into the waste water discharged from the first drain line 103 and the second drain line 107. The waste water treatment device 109 discards the waste water treated with the medicine.

  The accessory control device 110 controls the fan power detected by the first power meter 162, the cooling water quality index value detected by the cooling water quality sensor 1052, the replenishment water quality index value detected by the replenishment water quality sensor 1062, and the circulation detected by the circulating water amount sensor 1053. Amount of water, cooling tower inlet water temperature detected by cooling tower inlet water temperature sensor 1054, cooling tower outlet water temperature detected by cooling tower outlet water temperature sensor 1055, pump power detected by second power meter 1056, wet bulb measured by environment measuring device 111 The power of the fan 161 and the power of the third water supply pump 1051 are determined based on the temperature and the generated power measured by the operation monitoring device 112. The fan 161 and the third water supply pump 1051 are an example of an accessory.

The environment measuring device 111 measures the wet bulb temperature in the vicinity of the cooling tower 16.
The operation monitoring device 112 measures the generated power of the power plant 10.

<< Relationship between state quantities of power plant and accessories >>
The fan 161 promotes the evaporation of water in the cooling tower 16. Therefore, it is necessary to increase the power of the fan 161 as the water is less likely to evaporate in the cooling tower 16. The evaporation amount of water changes with the wet bulb temperature of the atmosphere. That is, the wet bulb temperature in the vicinity of the cooling tower 16 is an example of the state quantity affecting the fan 161.
The third water supply pump 1051 controls the circulation amount of the cooling water in the cooling water circulation line 105. In order to prevent corrosion, scaling, fouling and the like from occurring in the cooling water circulation line 105, and to reduce the environmental load caused by the blow water, it is necessary to keep the water quality of the cooling water above a certain level. That is, the cooling water quality index value and the replenishment water quality index value are an example of state quantities that affect the third water supply pump 1051. Moreover, since it is necessary to increase the amount of heat exchange in the condenser 14 as the generated power of the power generation plant 10 is higher, it is necessary to increase the operation amount of the third water supply pump 1051. That is, the generated power of the power generation plant 10 is an example of the state quantity affecting the third water supply pump 1051.

  If the water quality of the cooling water is good, there is a possibility that the water quality can be maintained above a certain water quality even if the circulating multiple is increased. In this case, the power of the third water supply pump 1051 can be reduced if an increase in circulation factor is allowed. On the other hand, when the power of the third water supply pump 1051 decreases, the flow velocity of the cooling water heat-exchanged in the cooling tower 16 decreases, so the amount of heat exchange may decrease. As a result, since the amount of heat released by the cooling tower 16 is reduced, it is necessary to increase the power of the fan 161.

<< Configuration of accessory control device >>
FIG. 2 is a schematic block diagram showing the configuration of the accessory control device according to one embodiment.
The accessory control device 110 includes an information acquisition unit 1101, a maximum enrichment factor specification unit 1102, a pump power calculation unit 1103, an inlet water temperature estimation unit 1104, a fan power calculation unit 1105, a determination unit 1106, and an output unit 1107.

  The information acquisition unit 1101 includes fan power detected by the first power meter 162, cooling water quality index value detected by the cooling water quality sensor 1052, replenishment water quality index value detected by the replenishment water quality sensor 1062, and circulating water volume detected by the circulating water volume sensor 1053. The cooling tower inlet water temperature detected by the cooling tower inlet water temperature sensor 1054, the cooling tower outlet water temperature detected by the cooling tower outlet water temperature sensor 1055, the pump power detected by the second power meter 1056, and the wet bulb temperature measured by the environment measuring device 111 , The generated power measured by the operation monitoring device 112 is acquired.

  The maximum concentration factor identification unit 1102 identifies the maximum concentration factor allowed in the cooling water circulation line 105 based on the cooling water quality index value, the replenishment water quality index value, and the generated power acquired by the information acquisition unit 1101. For example, the maximum concentration factor specifying unit 1102 may specify the maximum concentration factor based on a table in which the cooling water quality index value, the supplemental water quality index value, the generated power, and the maximum concentration factor are associated The cooling water quality after a certain time may be estimated from the cooling water quality index value, the replenishment water quality index value, and the generated power, and the maximum enrichment factor may be specified based on the cooling water quality after the certain time. The maximum concentration factor is higher as the cooling water quality index value is lower (the better the water quality is).

  The pump power calculation unit 1103 calculates the power of the third water supply pump 1051 when a plurality of concentration factors equal to or less than the maximum concentration factor specified by the maximum concentration factor identification unit 1102 is set as the target concentration factor. If the target concentration ratio is determined, the pump power calculation unit 1103 can calculate the amount of blow water and the circulation flow rate corresponding thereto. The blow water amount and the circulation flow rate become lower values as the target concentration ratio is higher.

  The inlet water temperature estimation unit 1104 estimates the cooling tower inlet water temperature after a predetermined time based on the cooling tower outlet water temperature and the generated power acquired by the information acquisition unit 1101. The larger the generated power, the more the amount of heat exchange in the condenser 14. Therefore, the cooling tower inlet water temperature is higher as the generated power is larger. Further, the cooling tower inlet water temperature becomes higher as the cooling tower outlet water temperature is higher.

  The fan power calculation unit 1105 is a cooling tower inlet water temperature after a predetermined time estimated by the inlet water temperature estimation unit 1104, the wet bulb temperature of the air acquired by the information acquisition unit 1101, and the circulation flow rate calculated by the pump power calculation unit 1103. The power of the fan 161 for each target concentration ratio is calculated based on The power of the fan 161 is higher as the wet bulb temperature is higher, higher as the cooling tower inlet water temperature is higher, and lower as the amount of circulating water is larger.

FIG. 3 is a diagram showing an example of the relationship between the power of the third water supply pump and the power of the fan.
The determination unit 1106 is plural based on the power of the third water supply pump 1051 for each target concentration ratio calculated by the pump power calculation unit 1103 and the power of the fan 161 for each target concentration ratio calculated by the fan power calculation unit 1105. Among the target concentration factors, the one that minimizes the sum of the power of the third water supply pump 1051 and the power of the fan 161 is specified. The determination unit 1106 determines the power of the third water supply pump 1051 and the power of the fan 161 according to the specified target concentration ratio as the power of the third water supply pump 1051 and the power of the fan 161.
As shown in FIG. 3, the power of the third water supply pump 1051 and the power of the fan 161 are in a trade-off relationship. In the example of FIG. 3, the determination unit 1106 determines that the target concentration ratio related to the intersection point of the line indicating the power of the third water supply pump 1051 and the line indicating the power of the fan 161 is the power of the third water supply pump 1051 and the fan 161. The total of the power of Note that, as shown in FIG. 3, each target concentration factor is a value equal to or less than the maximum concentration factor calculated by the maximum concentration factor identifying unit 1102. Therefore, the determining unit 1106 determines the power related to any of a plurality of target concentration factors. The water quality of the cooling water can be kept above a certain level by using

  The output unit 1107 outputs, to the third water supply pump 1051 and the fan 161, an instruction to operate with the power determined by the determination unit 1106.

<< Operation of accessory control device >>
FIG. 4 is a flowchart showing the operation of the accessory control device according to the embodiment.
The information acquisition unit 1101 includes fan power detected by the first power meter 162, cooling water quality index value detected by the cooling water quality sensor 1052, replenishment water quality index value detected by the replenishment water quality sensor 1062, and circulating water volume detected by the circulating water volume sensor 1053. The cooling tower inlet water temperature detected by the cooling tower inlet water temperature sensor 1054, the cooling tower outlet water temperature detected by the cooling tower outlet water temperature sensor 1055, the pump power detected by the second power meter 1056, and the wet bulb temperature measured by the environment measuring device 111 The generated power measured by the operation monitoring device 112 is acquired (step S11).

  Next, the maximum concentration factor identification unit 1102 identifies the maximum concentration factor allowed in the cooling water circulation line 105 based on the cooling water quality index value, the replenishment water quality index value, and the generated power acquired by the information acquisition unit 1101. (Step S12). The pump power calculation unit 1103 calculates the power of the third water supply pump 1051 when the plurality of concentration factors equal to or less than the maximum concentration factor specified by the maximum concentration factor identification unit 1102 is the target concentration factor (step S13).

  The inlet water temperature estimation unit 1104 estimates the cooling tower inlet water temperature after a predetermined time based on the cooling tower outlet water temperature and the generated power acquired by the information acquisition unit 1101 (step S14). The fan power calculation unit 1105 is a cooling tower inlet water temperature after a predetermined time estimated by the inlet water temperature estimation unit 1104, the wet bulb temperature of the air acquired by the information acquisition unit 1101, and the circulation flow rate calculated by the pump power calculation unit 1103. The motive power of the fan 161 for each target concentration ratio is calculated based on (step S15). Note that calculating the power of the fan 161 based on the power of the third water supply pump 1051 determined based on the cooling water quality index value, the replenishment water quality index value, and the generated power is the cooling water quality index value, the replenishment water quality index value And the power of the fan 161 is determined based on the generated power.

  The determination unit 1106 identifies one of the plurality of target concentration ratios below the maximum concentration ratio that minimizes the sum of the power of the third water supply pump 1051 and the power of the fan 161, and the third water supply according to the target concentration ratio. The power of the pump 1051 and the power of the fan 161 are determined as the power of the third water supply pump 1051 and the power of the fan 161 (step S16). The output unit 1107 outputs, to the third water supply pump 1051 and the fan 161, an instruction to operate with the power determined by the determination unit 1106 (step S17). Thereby, the third water supply pump 1051 and the fan 161 can operate with small power while maintaining the water quality in the cooling water circulation line 105 at a certain level or more.

<< Operation / Effect >>
As described above, according to the first embodiment, the accessory control device 110 is a cooling water quality index value that is a state quantity of the power plant 10 that affects the third water supply pump 1051 that is one of the plurality of accessories. The power of the fan 161, which is one of a plurality of accessories, is determined based on the supplied water quality index value and the generated power. Thereby, the accessory control device 110 can determine the power of the fan 161 according to the water quality in the cooling water circulation line 105.

  Further, according to the first embodiment, the accessory control device 110 determines the power such that the total of the power of the third water supply pump 1051 and the power of the fan 161 is minimized. As a result, the power consumption by the auxiliary equipment of the plant can be reduced and the actually generated power can be increased.

  The power of the third feedwater pump 1051, which is a pump for pumping water in the circulating water system of the power generation plant 10, and the power of the fan 161 of the cooling tower 16 occupy most of the total power of accessories in the entire power generation plant 10. Therefore, by minimizing the sum of the power of the third water supply pump 1051 and the power of the fan 161 of the cooling tower 16, the power consumption of the entire power plant 10 can be greatly reduced.

Second Embodiment
The accessory control device 110 according to the first embodiment determines the power of the third water supply pump 1051 and the fan 161 so as to minimize the total power. On the other hand, depending on the price of the water obtained from the water source and the selling price, it may be cheaper to increase or decrease the blow water volume and the power of the third feed pump 1051.
In view of this, the accessory control device 110 according to the second embodiment determines the power of the accessory so that the actually generated power of the plant becomes maximum.

<< Configuration of accessory control device >>
FIG. 5 is a schematic block diagram showing the configuration of the accessory control device according to an embodiment.
The accessory control device 110 according to the second embodiment further includes a price storage unit 1108 and a blow water amount calculation unit 1109 in addition to the configuration according to the first embodiment.
The price storage unit 1108 stores the price per unit volume of water obtained from the water source and the selling price per unit power.
The blow water amount calculation unit 1109 calculates the amount of water (blow water amount) to be drained from the second drainage line 107 when a plurality of concentration factors equal to or less than the maximum concentration factor specified by the maximum concentration factor identification unit 1102 is the target concentration factor. . The blow water amount has a lower value as the target concentration ratio is higher.

  The determination unit 1106 according to the second embodiment is configured to execute the third operation based on the power of the third water supply pump 1051 and the fan 161 for each target concentration ratio and the selling price per unit power stored in the price storage unit 1108. The selling price of the power consumed by the operation of the water supply pump 1051 and the fan 161 is calculated. The determination unit 1106 also calculates the price of water to be acquired from the water source, based on the blow water volume for each target concentration ratio and the price per unit amount of water stored in the price storage unit 1108. The determination unit 1106 identifies one of the plurality of target concentration ratios that minimizes the sum of the selling price of the consumed power and the price of water acquired from the water source. The determination unit 1106 determines the power of the third water supply pump 1051 and the power of the fan 161 according to the specified target concentration ratio as the power of the third water supply pump 1051 and the power of the fan 161.

<< Operation of accessory control device >>
FIG. 6 is a flowchart showing the operation of the accessory control device according to one embodiment.
The information acquisition unit 1101 includes fan power detected by the first power meter 162, cooling water quality index value detected by the cooling water quality sensor 1052, replenishment water quality index value detected by the replenishment water quality sensor 1062, and circulating water volume detected by the circulating water volume sensor 1053. The cooling tower inlet water temperature detected by the cooling tower inlet water temperature sensor 1054, the cooling tower outlet water temperature detected by the cooling tower outlet water temperature sensor 1055, the pump power detected by the second power meter 1056, and the wet bulb temperature measured by the environment measuring device 111 The generated power measured by the operation monitoring device 112 is acquired (step S21).

  Next, the maximum concentration factor identification unit 1102 identifies the maximum concentration factor allowed in the cooling water circulation line 105 based on the cooling water quality index value, the replenishment water quality index value, and the generated power acquired by the information acquisition unit 1101. (Step S22). The pump motive power calculation unit 1103 calculates the motive power of the third water supply pump 1051 when the plurality of concentration factors equal to or less than the maximum concentration factor specified by the maximum concentration factor identification unit 1102 is the target concentration factor (step S23). The blow water amount calculation unit 1109 calculates the blow water amount from the second drainage line 107 when a plurality of concentration factors equal to or less than the maximum concentration factor specified by the maximum concentration factor identification unit 1102 is the target concentration factor (Step S24).

  The inlet water temperature estimation unit 1104 estimates the cooling tower inlet water temperature after a predetermined time based on the cooling tower outlet water temperature and the generated power acquired by the information acquisition unit 1101 (step S25). The fan power calculation unit 1105 is a cooling tower inlet water temperature after a predetermined time estimated by the inlet water temperature estimation unit 1104, the wet bulb temperature of the air acquired by the information acquisition unit 1101, and the circulation flow rate calculated by the pump power calculation unit 1103. The motive power of the fan 161 for each target concentration ratio is calculated based on (step S26).

  Based on the information stored in the price storage unit 1108, the determination unit 1106 determines the selling price of the power consumed by the third water supply pump 1051 associated with each target concentration ratio, and the power consumed by the fan 161 associated with each target concentration ratio. The selling price and the price of water supplied from the water source according to each target concentration ratio are calculated (step S27). The determination unit 1106 identifies the one in which the sum of the selling price of electricity and the price of water is the smallest, and motive power of the third water supply pump 1051 and motive power of the fan 161 according to the target concentration ratio. The power of 1051 and the power of the fan 161 are determined (step S28). The output unit 1107 outputs, to the third water supply pump 1051 and the fan 161, an instruction to operate with the power determined by the determination unit 1106 (step S29). Thus, the third water supply pump 1051 and the fan 161 can operate so as to reduce the expenditure while maintaining the water quality in the cooling water circulation line 105 at a certain level or more.

<< Operation / Effect >>
As described above, according to the second embodiment, the accessory control device 110 minimizes the sum of the selling price by the power of the third water supply pump 1051 and the fan 161 and the price of makeup water from the water source. So, determine the power. Thereby, the accessory control device 110 can reduce the expenditure by the accessories and increase the actual selling price.

Third Embodiment
It is known that the power plant 10 changes in characteristics due to deterioration or the like. Therefore, the accessory control device 110 according to the third embodiment determines the appropriate power of the accessory according to the change of the power plant 10 by machine learning or simulation based on the state of the power plant 10.

<< Configuration of accessory control device >>
FIG. 7 is a schematic block diagram showing the configuration of the accessory control device according to an embodiment.
The accessory control device 110 includes an information acquisition unit 1101, a model storage unit 1110, a maximum concentration factor identification unit 1111, a power identification unit 1112, a price storage unit 1108, a decision unit 1106, an output unit 1107, an input unit 1113, and an update unit 1114. Prepare.

  The model storage unit 1110 receives the information acquired by the information acquisition unit 1101 as an input and outputs a maximum concentration factor, the information acquired by the information acquisition unit 1101 and the target concentration ratio as input, and the third water supply pump The power of the fan 1051 and the fan 161 and the power model for outputting the blow water volume are stored. The concentration factor model and the power model are, for example, a machine learning model such as a neural network model or a simulation model.

The maximum concentration ratio specifying unit 1111 specifies the maximum concentration ratio by inputting the information acquired by the information acquisition unit 1101 into the concentration ratio model stored in the model storage unit 1110.
The power identification unit 1112 identifies a plurality of target concentration factors less than the maximum concentration factor identified by the maximum concentration factor identification unit 1111. The power specification unit 1112 specifies the power of the third water supply pump 1051 and the fan 161 and the blow water volume related to each target concentration ratio based on the power model stored in the model storage unit 1110. That is, the power specification unit 1112 specifies the power of the fan 161 based on the state amount affecting the third water supply pump 1051 acquired by the information acquisition unit 1101, and the power specification unit 1112 determines the power based on the state amount affecting the fan 161. 3 Identify the power of the water supply pump 1051.

The input unit 1113 receives an input of power of the third water supply pump 1051 and the fan 161 from the user.
The update unit 1114 updates the model stored in the model storage unit 1110 based on the information acquired by the information acquisition unit 1101 and the information input to the input unit 1113. For example, the update unit 1114 can specify the relationship between the information acquired by the information acquisition unit 1101 and the concentration ratio from the information acquired by the information acquisition unit 1101. Specifically, since the concentration factor can be calculated from the amount of circulating water acquired by the information acquiring unit 1101, the updating unit 1114 performs concentration using a combination of the information acquired by the information acquiring unit 1101 and the concentration factor. The magnification model can be updated.
Also, for example, the updating unit 1114 identifies, from the information acquired by the information acquiring unit 1101, the relationship between the information acquired by the information acquiring unit 1101, the power of the fan 161, the power of the third water supply pump 1051, and the blow water volume. be able to. Specifically, the amount of blow water can be calculated from the amount of circulating water acquired by the information acquisition unit 1101, and the power of the fan 161 and the power of the third water supply pump 1051 can be calculated from the fan power and the pump power, respectively. Therefore, the updating unit 1114 can update the power model using, as teacher data, a combination of the information acquired by the information acquiring unit 1101, the power of the fan 161 and the third water supply pump 1051, and the blow water amount.
Also, for example, the updating unit 1114 can update the power model based on the information acquired by the information acquiring unit 1101, the power of the fan 161 input to the input unit 1113, and the power of the third water supply pump 1051. .

<< Operation of accessory control device >>
FIG. 8 is a flowchart showing the operation of the accessory control device according to one embodiment.
The information acquisition unit 1101 includes fan power detected by the first power meter 162, cooling water quality index value detected by the cooling water quality sensor 1052, replenishment water quality index value detected by the replenishment water quality sensor 1062, and circulating water volume detected by the circulating water volume sensor 1053. The cooling tower inlet water temperature detected by the cooling tower inlet water temperature sensor 1054, the cooling tower outlet water temperature detected by the cooling tower outlet water temperature sensor 1055, the pump power detected by the second power meter 1056, and the wet bulb temperature measured by the environment measuring device 111 The generated power measured by the operation monitoring device 112 is acquired (step S31).

  Next, the maximum concentration factor identification unit 1111 identifies the maximum concentration factor by inputting the information acquired by the information acquisition unit 1101 into the concentration factor model stored by the model storage unit 1110 (step S32). Next, the power identification unit 1112 identifies a plurality of concentration factors equal to or less than the maximum concentration factor identified by the maximum concentration factor identification unit 1102 as a target concentration factor (step S33). Next, the power specification unit 1112 inputs the information acquired by the information acquisition unit 1101 into the power model stored in the model storage unit 1110 and the target concentration ratio for each of the specified target concentration ratios, thereby the third water supply pump. The power of the fan 1051 and the fan 161 and the blow water amount are specified (step S34).

  Based on the information stored in the price storage unit 1108, the determination unit 1106 determines the selling price of the power consumed by the third water supply pump 1051 associated with each target concentration ratio, and the power consumed by the fan 161 associated with each target concentration ratio. The selling price and the price of water supplied from the water source according to each target concentration ratio are calculated (step S35). The determination unit 1106 identifies the one in which the sum of the selling price of electricity and the price of water is the smallest, and motive power of the third water supply pump 1051 and motive power of the fan 161 according to the target concentration ratio. The power of 1051 and the power of the fan 161 are determined (step S36). The output unit 1107 outputs, to the third water supply pump 1051 and the fan 161, an instruction to operate with the power determined by the determination unit 1106 (step S37). Thus, the third water supply pump 1051 and the fan 161 can operate so as to reduce the expenditure while maintaining the water quality in the cooling water circulation line 105 at a certain level or more.

<< Operation / Effect >>
As described above, according to the third embodiment, the accessory control device 110 causes the updating unit 1114 to update the concentration magnification model and the power model to change the characteristics due to deterioration of the power plant 10 or the like. Also, the power of accessories can be determined appropriately.

As mentioned above, although one embodiment was described in detail with reference to drawings, a concrete configuration is not restricted to the above-mentioned thing, It is possible to do various design changes etc.
For example, although the accessory control device 110 determines the power of the fan 161 and the third water supply pump 1051 in the above-described embodiment, the present invention is not limited thereto. For example, in another embodiment, the power of other accessories such as the first water supply pump 1011 may be determined in addition to or instead of the fan 161 and the third water supply pump 1051.

  Moreover, although the accessory control device 110 which controls an accessory was demonstrated as an example of an accessory power determination device in embodiment mentioned above, it is not restricted to this. For example, in another embodiment, the power generation plant 10 may be provided with an accessory power determination device that displays power calculated without directly controlling the accessories on a display or the like, instead of the accessory control device 110. . In this case, the operator visually recognizes the output value and controls the accessory.

<Computer configuration>
FIG. 9 is a schematic block diagram showing the configuration of a computer according to at least one embodiment.
The computer 900 includes a CPU 902, a main storage 902, an auxiliary storage 903, and an interface 904.
The accessory control device 110 described above is implemented in the computer 900. The operation of each processing unit described above is stored in the auxiliary storage device 903 in the form of a program. The CPU 902 reads a program from the auxiliary storage device 903 and develops it in the main storage device 902, and executes the above processing according to the program. Further, the CPU 902 secures a storage area corresponding to each storage unit described above in the main storage unit 902 or the auxiliary storage unit 903 according to a program.

  Examples of the auxiliary storage device 903 include an HDD (Hard Disk Drive), an SSD (Solid State Drive), a magnetic disk, a magneto-optical disk, a CD-ROM (Compact Disc Read Only Memory), and a DVD-ROM (Digital Versatile Disc Read Only). Memory, semiconductor memory, and the like. The auxiliary storage device 903 may be internal media directly connected to the bus of the computer 900 or may be external media connected to the computer 900 via the interface 904 or a communication line. When this program is distributed to the computer 900 by a communication line, the computer 900 that has received the distribution may deploy the program in the main storage device 902 and execute the above processing. In at least one embodiment, secondary storage 903 is a non-transitory tangible storage medium.

  Further, the program may be for realizing a part of the functions described above. Furthermore, the program may be a so-called difference file (difference program) that realizes the above-described function in combination with other programs already stored in the auxiliary storage device 903.

DESCRIPTION OF SYMBOLS 10 Power generation plant 16 Cooling tower 161 Fan 162 1st power meter 105 Cooling water circulation line 1051 3rd feed water pump 1052 Cooling water quality sensor 1053 Cooling water inlet amount sensor 1054 Cooling tower inlet water temperature sensor 1055 Cooling tower outlet water temperature sensor 1056 2nd power meter 110 Auxiliary machine Control device 1101 Information acquisition unit 1102 Maximum concentration factor identification unit 1103 Pump power calculation unit 1104 Inlet water temperature estimation unit 1105 Fan power calculation unit 1106 Determination unit 1107 Output unit 1108 Price storage unit 1109 Blow water volume calculation unit 1110 Model storage unit 1111 Maximum concentration factor Specification unit 1112 Power specification unit 1113 Input unit 1114 Update unit 111 Environment measurement device 112 Operation monitoring device

Claims (8)

An accessory power determination device for determining power of a plurality of accessories in a plant having a plurality of accessories, comprising:
A determination unit that determines the power of a second accessory, which is one of the plurality of accessories, based on the state quantity of the plant that affects the first accessory, which is one of the plurality of accessories. Auxiliary machine power determination device provided with The accessory power determination device according to claim 1, wherein the determination unit determines the power such that a sum of the power of the first accessory and the power of the second accessory is minimized. The accessory power determination device according to claim 1, wherein the determination unit determines the power such that an actual selling price of the plant is maximized. The auxiliary machine power determination device according to any one of claims 1 to 3, wherein the first auxiliary machine or the second auxiliary machine is a pump that pumps water of a circulating water system of the plant. The auxiliary machine power determination device according to any one of claims 1 to 4, wherein the first auxiliary machine or the second auxiliary machine is a fan of a cooling tower provided in the plant. A plurality of accessories, including a first accessory and a second accessory;
A sensor for measuring a state quantity affecting the first accessory and a state quantity affecting the second accessory;
A plant comprising the accessory power determination device according to any one of claims 1 to 5. A method of determining the power of a plurality of accessories in a plant having a plurality of accessories, comprising:
Determining the power of a second accessory, which is one of the plurality of accessories, based on the state quantity of the plant that affects the first accessory, which is one of the plurality of accessories. Auxiliary machine power determination method. A computer for determining the power of the plurality of accessories in a plant having a plurality of accessories;
Determining the power of a second accessory, which is one of the plurality of accessories, based on the state quantity of the plant that affects the first accessory, which is one of the plurality of accessories. Program to run.

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