JP2020020277A - Temperature difference management support device and temperature difference management support program - Google Patents

Abstract

To precisely manage a water intake-outlet port seawater temperature.SOLUTION: A temperature difference management support device 300 is configured to calculate, based on a cumulative value A of water intake-outlet port seawater temperature differences from a start time to a present time within a predetermined period and a present time B, an average value G of water intake-outlet port seawater temperature differences during a remaining period after the present time within the predetermined period in such a manner that an average value of water intake-outlet port seawater temperature differences within the predetermined period becomes equal to or smaller than a target value E. Based on the calculated average value G, a present generator output value D and a rate of change of the water intake-outlet port seawater temperature difference per unit output in a generator, an average value H of generator output values in the remaining period is calculated, and the calculated average value H is outputted.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a temperature difference management support device and a temperature difference management support program for managing a temperature difference between a temperature at the time of water intake and a temperature at the time of water discharge used for power generation.

  In thermal power generation, oil, coal, liquefied natural gas, and other fuels are heated to heat water, and the high-temperature, high-pressure steam generated is used to turn a turbine and turn a generator connected to the turbine. Generate electricity. In thermal power generation, when seawater is used as cooling water, a surface condenser in which turbine steam and cooling water do not directly contact each other is used.

  Regarding the seawater used for cooling in the surface condenser, the temperature difference between the discharged and discharged water is determined based on agreements with local governments, etc., and thermal power plants need to comply with this. Specifically, the thermal power plant manages, for example, a temperature difference between the intake seawater temperature and the outlet seawater temperature (hereinafter, referred to as “intake and discharge seawater temperature difference”).

  The intake seawater temperature difference fluctuates due to a change in the intake seawater temperature even when the output of the generator is constant. For this reason, the thermal power plant adjusts the output of the generator according to the situation so that the seawater temperature difference between the intake and discharge ports is within a predetermined threshold.

  As a related technique, specifically, conventionally, for example, an average inlet / outlet seawater temperature difference is calculated based on an intake / outlet seawater temperature difference calculated by measuring an intake water temperature and a discharge water temperature, At the time of normal control in which at least one of the outlet seawater temperature difference and the average intake outlet seawater temperature difference satisfies the first condition, the power generation output is controlled based on the control amount of the power generation output calculated according to a predetermined calculation method, At the time of emergency control in which at least one of the intake temperature, the intake / outlet seawater temperature difference, and the average intake / outlet seawater temperature difference satisfies the second condition, the power generation output is controlled based on the control amount of the power generation output obtained according to the quick reference. There is a technique relating to a method of managing the seawater temperature difference between the intake and discharge ports and a facility for managing the seawater temperature difference between the intake and discharge ports (for example, see Patent Document 1 below).

  Further, as a related technique, specifically, conventionally, for example, a water intake temperature and a water discharge temperature are measured and the water intake temperature is stored in a time series, and a temperature difference (instantaneous temperature) between the simultaneously measured water discharge temperature and water intake temperature is conventionally known. Difference) is calculated based on a load suppression chart that shows how much the power generation output (load) reduces the intake / discharge port seawater temperature difference, and the discharge water temperature and the discharge water temperature for a predetermined period of time. A temperature difference management system and intake / outlet seawater temperature difference management system that calculates the temperature difference from the previously measured intake temperature as the management temperature difference and displays the calculated instantaneous temperature difference and management temperature difference. There has been a technology related to a temperature difference management method (for example, see Patent Document 2 below).

JP-A-2017-31840 JP-A-2006-200078

  However, the conventional technologies described in Patent Documents 1 and 2 described above both control the power generation output based on a quick reference table created based on past actual values. Because it is intermittent data such as "How many times the difference between the intake and outlet seawater temperature when the output is reduced by 25 MW" and "How many times the intake and outlet water temperature difference when the power generation output is reduced by 50 MW" The seawater temperature at the intake / discharge port can be controlled only with the roughness of the plot in the range described in the quick reference table, and there is a problem that it is difficult to precisely control the seawater temperature at the intake / discharge port.

  It is an object of the present invention to provide a temperature difference management support device and a temperature difference management support program capable of precisely managing the intake / outlet seawater temperature in order to solve the above-described problems caused by the conventional technology.

  In order to solve the above-described problems and achieve the object, a temperature difference management support device according to the present invention provides a temperature difference management apparatus that indicates a difference between an intake seawater temperature and an outlet seawater temperature from a start time of a predetermined period to a current time. An acquisition unit that acquires the cumulative value of the outlet seawater temperature difference, and, based on the cumulative value and the current time acquired by the acquiring unit, the average value of the outlet seawater temperature difference in the predetermined period is equal to or less than a target value. A temperature difference calculation unit that calculates an average value of the intake / outlet seawater temperature difference in the remaining period after the current time in the predetermined period, an average value calculated by the temperature difference calculation unit, A generator output value at a time, and an output value calculation unit that calculates an average value of the generator output values during the remaining period based on the rate of change of the intake / outlet seawater temperature difference per unit output in the generator. , The output An output unit for outputting an average value calculated by the calculating unit, characterized by comprising a.

Further, in the temperature difference management support device according to the present invention, in the above invention, the rate of change is different from the generator output value and the intake / outlet seawater temperature difference at the first time and the first time. It is a value calculated by the following formula based on the generator output value and the intake / outlet seawater temperature difference at the time of 2.
X = (Xt1-Xt2) / (Dt1-Dt2)
X: Change rate of intake / outlet seawater temperature difference per unit output Dt1: Generator output value at first time Xt1: Intake / outlet seawater temperature difference at first time Dt2: Generator output at second time t2 Value (However, Dt2 <Dt1)
Xt2: Seawater temperature difference at the intake / discharge port at the second time t2 (where Xt2 <Xt1)

  In addition, the temperature difference management support device according to the present invention, in the above invention, further includes a receiving unit that receives a setting of the generator output value after the change and an operation time for operating the generator with the generator output value after the change. The output value calculation unit may be configured such that, based on the changed generator output value and the operation time received by the reception unit, the average value of the intake / outlet seawater temperature difference in the predetermined period is equal to or less than a target value. And calculating a generator output value in a period other than the operation time in the remaining period.

Further, in the temperature difference management support device according to the present invention, in the above invention, the generator output value in a period other than the operation time is the generator output value and the operation time after the change received by the reception unit, Based on the target value, the cumulative value acquired by the acquisition unit, the generator output value at the current time, the current time, and the change rate, the value is calculated by the following equation. And
(E × 24−A − ((DC−D) × X + C) × TC) / (24−B−TC) −C)
/ (X + D)
DC: Generator output value after fluctuation TC: Operating time E: Target value A: Cumulative value D: Current generator output value X: Change rate C: Current generator output value B: Current time

  The temperature difference management support device according to the present invention is characterized in that, in the above invention, the receiving unit receives the operation time by receiving a start time and an end time of the operation time.

  Further, in the temperature difference management support device according to the present invention, in the above invention, a receiving unit that receives the setting of the changed generator output value, a changed generator output value received by the receiving unit, Based on the average value calculated by the temperature difference calculation unit and the rate of change of the intake / exhaust port seawater temperature difference per unit output in the generator, it is possible to operate with the changed generator output value in the remaining period during the remaining period. And a driving time calculating unit for calculating a proper driving time.

  Further, in the temperature difference management support device according to the present invention, in the above-described invention, the temperature difference calculation unit determines a current generator output value in the remaining time based on the cumulative value acquired by the acquisition unit. Calculating the second average value of the intake / outlet seawater temperature difference when the power is generated at the same generator output, and the output unit calculates the second average value calculated by the temperature difference calculation unit and the predetermined threshold value. And outputting information relating to the magnitude relation between.

  Further, the temperature difference management program according to the present invention stores, in a computer, a cumulative value of an intake / outlet seawater temperature difference indicating a difference between an intake seawater temperature and an outlet seawater temperature from a start time of a predetermined period to a current time. Acquired, based on the acquired cumulative value and the current time, so that the average value of the intake and discharge port seawater temperature difference in the predetermined period is equal to or less than the target value, the remaining time after the current time in the predetermined period. The average value of the inlet / outlet seawater temperature difference during the period is calculated, and based on the calculated average value, the current generator output value, and the rate of change of the inlet / outlet seawater temperature difference per unit output in the generator. Then, an average value of the generator output values in the remaining period is calculated, and a process of outputting the calculated average value is executed.

  ADVANTAGE OF THE INVENTION According to the temperature difference management support apparatus and the temperature difference management support program which concern on this invention, there exists an effect that the intake and discharge port seawater temperature can be managed precisely.

It is explanatory drawing which shows schematic structure of a thermal power plant. FIG. 1 is an explanatory diagram illustrating a hardware configuration of a temperature difference management support device according to an embodiment of the present invention. It is an explanatory view showing an example of an output of a temperature difference management support device of an embodiment concerning this invention. It is a block diagram showing the functional composition of the temperature difference management support device of an embodiment concerning this invention. It is a flowchart which shows the processing procedure of the temperature difference management support apparatus of embodiment concerning this invention.

  Hereinafter, preferred embodiments of a temperature difference management support device and a temperature difference management support program according to the present invention will be described in detail with reference to the accompanying drawings.

(Schematic configuration of thermal power plant)
First, a schematic configuration of the thermal power plant will be described. FIG. 1 is an explanatory diagram illustrating a schematic configuration of a thermal power plant. In FIG. 1, a thermal power plant 100 includes a boiler 101, a turbine 102, a generator 103, and a condenser 104.

  The boiler 101 includes a combustion chamber 105 and a heat exchange device 106. The combustion chamber 105 burns fuel supplied from the fuel tank 105a. Specifically, for example, petroleum, LNG (Liquid Natural Gas: liquefied natural gas), coal, or the like can be used as the fuel. The heat exchange device 106 includes a closed container made of steel, and transfers heat obtained by combustion of fuel in the combustion chamber 105 to water in the container to generate steam.

  The turbine 102 includes a blade 107 that receives fluid energy, and a shaft 108 that transmits a driving force. Turbine 102 rotates shaft 108 by receiving thermal energy of steam generated by boiler 101 by blade 107, and extracts power from rotation of shaft 108.

  The generator 103 includes a rotor connected to a shaft 108 of the turbine 102, a stator having an iron core and a coil, a stator frame for supporting the stator (both not shown), and the like. Electric power is generated by rotating the rotor by the rotation of. The generator 103 outputs a current power generation amount in the generator 103 (hereinafter, referred to as “generator output value”).

  The generator output value may be a value at the power generation terminal that is an output position of power from the generator 103, or may be a value at the power transmission terminal that is an output position of power from the thermal power plant 100 to the power transmission and distribution network. The generator 103 outputs a generator output value to a control computer device (not shown) of the thermal power plant 100, for example.

  The generator 103 may output a generator output value to a control computer device of a central power supply command center of a power company that monitors the power generation amount of a plurality of power plants including the thermal power plant 100. In this case, the generator output value may be directly output to, for example, the control computer device of the central power supply command center, or may be output via the control computer device of the power plant.

  The condenser 104 returns the steam used for rotating the turbine 102 to water. The condenser 104 cools the steam used for rotating the turbine 102 back to water by the seawater passing through the heat transfer tube 110 through which the seawater taken from the water inlet 109 passes, and returns the seawater used for cooling from the outlet 111 to the sea. Water. The condenser 104 converts the steam used for rotating the turbine 102 into water to generate a high vacuum state by reducing the volume, improves the steam flow, and improves the efficiency of the turbine 102.

  In the vicinity of the water intake 109, a water intake temperature sensor 112 that measures the temperature of seawater withdrawn from the water intake 109 is provided. A water discharge temperature sensor 113 that measures the temperature of seawater discharged from the water discharge port 111 is provided near the water discharge port 111. Output values of the water intake temperature sensor 112 and the water discharge temperature sensor 113 are output to, for example, a control computer device of a power plant.

  The control computer device of the power plant receives input of output values from the water intake temperature sensor 112, the water discharge temperature sensor 113, and the generator 103, and stores each received output value in association with the time at which the output value was measured. are doing. In addition, the control computer device of the power plant, based on the output values from the water intake temperature sensor 112 and the water discharge temperature sensor 113, calculates the water discharge seawater temperature that is the temperature difference between the water intake seawater temperature and the water discharge seawater temperature at the same time. The difference is recorded as logging data that is periodically recorded over time.

  The control computer device of the power plant stores, for example, logging data for each predetermined sampling time such as “30 seconds” or “1 minute”. The sampling time of the logging data stored in the control computer device of the power plant is not limited to one minute, and may be a time longer than “1 minute” such as “5 minutes” or “10 minutes”. , A time shorter than “1 minute”.

(Hardware configuration of temperature difference management support device)
Next, a hardware configuration of the temperature difference management support device according to the embodiment of the present invention will be described. FIG. 2 is an explanatory diagram illustrating a hardware configuration of the temperature difference management support device according to the embodiment of the present invention.

  The temperature difference management support device can be installed, for example, at a power station that is to be monitored for an intake / exhaust port seawater temperature difference indicating a difference between the seawater temperature at the intake port 109 and the seawater temperature at the outlet port 111. In this case, the temperature difference management support device may be installed as an independent computer device, or may be realized by a control computer device of a power plant. Further, the temperature difference management support device may be installed, for example, at a central power supply command center. Also in this case, the temperature difference management support device may be installed as an independent computer device, or may be realized by a control computer device of a central power supply command center.

  2, the temperature difference management support device 200 includes a CPU (Central Processing Unit) 201, a memory 202, and an input / output I / F (Interface) 203. The units 201 to 203 included in the temperature difference management support device 200 are connected by a bus 204, respectively.

  The CPU 201 controls the entire temperature difference management support device 200. The memory 202 stores programs such as a boot program, data constituting various databases, and the like. Further, the memory 202 stores, for example, a temperature difference monitoring program according to the embodiment of the present invention. By executing the temperature difference monitoring program, the CPU 201 acquires and calculates each value (see FIG. 3) relating to monitoring of the intake / outlet seawater temperature difference by the temperature difference management support device 200.

  Further, specifically, the memory 202 stores, for example, logging data. When the temperature difference management support device 200 monitors the temperature differences of a plurality of power plants, the memory 202 of the temperature difference management support device 200 stores logging data for each power plant. When a plurality of generators 103 are provided in one power plant, the memory 202 of the temperature difference management support device 200 stores logging data for each generator 103.

  The memory 202 is used as a work area of the CPU 201. The memory 202 includes, for example, a read-only memory (ROM), a random access memory (RAM), a solid state drive (SSD) including a NAND memory and a NAND memory controller that controls the NAND memory, and a hard disk drive (HDD). ).

  The input / output I / F 203 controls an interface between the inside of the temperature difference management support device 200 and an external device. Specifically, the input / output I / F 203 controls an interface with the water intake temperature sensor 112, the water discharge temperature sensor 113, and the generator 103, and outputs the output values from the water intake temperature sensor 112, the water discharge temperature sensor 113, and the generator 103, for example. Accept input. The input / output I / F 203 may directly receive an input of an output value from the water intake temperature sensor 112, the water discharge temperature sensor 113, and the generator 103, or may receive the input via a control computer device of the power plant.

  More specifically, the input / output I / F 203 controls an interface with a display device having a display screen, and outputs various types of display information to the display device. The display information is information for displaying, on the display screen of the display device, information relating to monitoring of the inlet / outlet seawater temperature difference by the temperature difference management support device 200, and specifically includes various acquired (measured) values and And various values such as arbitrarily set thresholds, calculated values based on these acquired values and thresholds, and commands for displaying the values on the display screen of the display device.

  Further, specifically, the input / output I / F 203 controls an interface with an input device such as a pointing device such as a mouse or a touch pad, and a keyboard or a numeric keypad, and receives an input signal from the input device. The input device is used, for example, to input an instruction to calculate a generator output value to the temperature difference management support device 200 (see FIG. 5).

  When the temperature difference management support device 200 and the control computer of the thermal power plant 100 are configured separately, the input / output I / F 203 is connected to a network such as the Internet, and the temperature difference management support device is connected via the network. The interface between the inside of the apparatus 200 and an external device may be controlled.

  In this case, specifically, the input / output I / F 203 is, for example, a control computer of the thermal power plant 100 that receives input of output values from the water intake temperature sensor 112, the water discharge temperature sensor 113, and the generator 103, or a central power supply command center. By performing communication with a control computer via a network, input of output values from the water intake temperature sensor 112, the water discharge temperature sensor 113, and the generator 103 can be received.

(Example of output from temperature difference management support device 200)
Next, an output example of the temperature difference management support device 200 will be described. FIG. 3 is an explanatory diagram illustrating an output example of the temperature difference management support device 200. As shown in FIG. 3, the temperature difference management support device 200 outputs display information for displaying the display screen 300 on the display device by executing the temperature difference management support program. The display screen 300 displays the values A to M.

  The value A indicates the cumulative value of the logging data of the inlet / outlet seawater temperature difference. In this embodiment, the cumulative value A of the logging data of the inlet / outlet seawater temperature difference is the “cumulative value of the inlet / outlet seawater temperature difference indicating the difference between the inlet seawater temperature and the outlet seawater temperature” according to the present invention. Is equivalent to

  The cumulative value A of the logging data of the inlet / outlet seawater temperature difference indicates the cumulative value of the logging data of the inlet / outlet seawater temperature difference in the reference time range. Specifically, the cumulative value A of the logging data of the inlet / outlet seawater temperature difference is, for example, the daily value of the inlet / outlet seawater temperature difference between 0:00 (0:00 am) to 24:00 every day. Indicates the cumulative value of logging data. In this embodiment, 24 hours (1 day) corresponds to the “predetermined period” according to the present invention.

  In this embodiment, the temperature difference management support device 200 is provided with a water discharge and discharge port every time “every hour” comes, such as “1:00 am” and “1:00 pm”. Get the cumulative value of logging data of seawater temperature difference. The temperature difference management support device 200 obtains all logging data for the day from 0:00 on the day from the control computer of the power plant every time “every hour” comes, Calculate the cumulative value of the temperature difference logging data. Alternatively, the temperature difference management support apparatus 200 acquires only the latest (unacquired) logging data every time “every hour” arrives, and calculates the cumulative value of the logging data of the intake / outlet seawater temperature difference. May be.

  Specifically, for example, at 3:00 (3:00 am), logging data of the inlet / outlet seawater temperature difference is obtained, and the logging data of the inlet / outlet seawater temperature difference at 1:00 is 7.1 ° C. If the logging data of the inlet / outlet seawater temperature difference at 2 o'clock is 6.5 ° C, and the logging data of the inlet / outlet seawater temperature difference at 3 o'clock is 5.4 ° C, the cumulative value of the logging data is “19 (° C). ) ".

  The value B indicates the time (current time) at the time when the cumulative value A of the logging data of the inlet / outlet seawater temperature difference is obtained. On the display screen 300, the current time B is displayed as an integer indicating the hour. Specifically, the current time B is displayed on the display screen 300, for example, as "1" for "1:00 am" and "15" for "3:00 pm". .

  Since the logging data includes time information, when a plurality of pieces of logging data are acquired, the time information included in the most recently acquired logging data is displayed as the current time. When the temperature difference management support device 200 acquires all the logging data from 0:00 on the current day to the current time on the current day, even if the current time is displayed based on the number of acquired logging data. Good. For example, since the number of logging data acquired at 3:00 (3:00 am) is three, the current time may be displayed based on the number of logging data.

  The value C indicates the instantaneous value of the current seawater temperature difference between the intake and discharge ports. Among the seawater temperature differences that change every moment, the value obtained when the seawater temperature difference between the outlets is stable is acquired as the instantaneous value C of the current seawater temperature difference between the outlets. Therefore, there are cases where the time at which the instantaneous value C of the current intake / outlet seawater temperature difference is measured does not match the current time B, but for convenience, the instantaneous value of the current intake / outlet seawater temperature difference is I do.

  Specifically, for example, when the sampling time of the logging data is “30 seconds”, the seawater temperature difference that is continuously stable for a predetermined length of time, such as 5 minutes, is determined as the current release water temperature. It is obtained as the instantaneous value C of the water mouth seawater temperature difference. In this case, the average value of the inlet / outlet seawater temperature difference at the time when the fluctuation width of the inlet / outlet seawater temperature difference falls within the predetermined threshold range for a predetermined length of time continuously is calculated as the current inlet / outlet port. It may be obtained as the instantaneous value C of the seawater temperature difference.

  Stable outlet seawater temperature difference is, for example, based on the logging data, when generating a graph with the horizontal axis is time and the vertical axis is the outlet seawater temperature difference, in the graph with respect to the horizontal axis Can be specified by the position where a portion that is nearly parallel appears for a predetermined length or more.

  The value D indicates the current generator output value. In this embodiment, the current generator output value D corresponds to the “generator output value at the current time” according to the present invention. The seawater used for cooling is taken in from the water inlet 109 and introduced into the condenser 104, subjected to heat exchange with steam, and then discharged through the water outlet 111. For this reason, when the instantaneous value C of the present intake / discharge port seawater temperature difference is obtained, the point at which the seawater is subjected to heat exchange with steam in the condenser 104 is the instantaneous value of the current intake / discharge port seawater temperature difference. It is before the time when C was acquired. In other words, the point in time at which the instantaneous value C of the present seawater temperature difference of the intake / outlet port is obtained is later than the point in time when the seawater is subjected to heat exchange with steam in the condenser 104.

  Considering the delay from the time when the instantaneous value C of the current inlet / outlet seawater temperature difference is obtained and the time when the seawater is subjected to heat exchange with steam in the condenser 104, the current generator output value D is Shows the generator output value at a time that is a predetermined time earlier than the time at which the instantaneous value C of the present intake / outlet seawater temperature difference was measured. The predetermined time can be appropriately set by an administrator of the temperature difference management support device 200 or the like based on the distance from the condenser 104 to the water outlet 111, the capacity of the pump, and the like.

  The value E indicates the target value of the temperature difference daily average value. The target value E of the temperature difference daily average value is an average value of the intake and discharge seawater temperature difference to be protected throughout the day. For example, based on an upper limit value determined based on an agreement with each local government, the upper limit value is set. Set to a lower value than the value. Specifically, for example, when the upper limit is 7.0 ° C., the target value of the average daily temperature difference can be set to 6.84 ° C., which does not become 7.0 ° C. even if the terminal digits are rounded off. .

  By setting the target value E of the temperature difference daily average value in this way, if the actual intake and discharge seawater temperature difference is different from the predicted intake and discharge seawater temperature difference due to weather or the like, Can be handled with a margin. The target value E of the temperature difference daily average value can be appropriately set by an administrator of the temperature difference management support device 200 or the like.

  The value F indicates a predicted value of the daily temperature difference average. In this embodiment, the predicted value F of the temperature difference daily average corresponds to the “second average value” according to the present invention. The predicted value F of the temperature difference daily average is one day (24 hours) when the operation of the generator 103 is continued for the remaining time until 24:00 of the day with the current generator output value D remaining. The predicted values of the average seawater temperature difference between the intake and discharge ports in the above are shown. The predicted value F of the temperature difference daily average is calculated based on, for example, the cumulative value A of the logging data of the intake / outlet seawater temperature difference, the current time B, and the instantaneous value C of the current intake / outlet seawater temperature difference. ) Can be calculated.

F = (A + C (24−B)) / 24 (1)
F: Predicted value of temperature difference daily average value A: Cumulative value of logging data of inlet / outlet seawater temperature difference C: Instantaneous value of current inlet / outlet seawater temperature difference

  The value G indicates the average value of the seawater temperature difference between the intake and discharge ports operable for the remaining time. In this embodiment, the remaining time corresponds to the “remaining period after the current time of the predetermined period” according to the present invention, and the average value G of the intake / discharge port seawater temperature difference operable for the remaining time is calculated by The present invention corresponds to “the average value of the seawater temperature difference between the intake and discharge ports in the remaining period after the current time in the predetermined period”.

  The average value G of the inlet / outlet seawater temperature difference that can be operated for the remaining time indicates the average value of the inlet / outlet seawater temperature difference that needs to be operated for the remaining time in order to achieve the target value E of the temperature difference daily average value. . The average value G of the inlet / outlet seawater temperature difference that can be operated for the remaining time is, for example, based on the cumulative value A of the logging data of the inlet / outlet seawater temperature difference, the current time B, and the target value E of the temperature difference daily average value. It can be calculated by calculating the following equation (2).

G = (E × 24−A) / (24−B) (2)
G: Average value of intake / discharge seawater temperature difference operable for remaining time E: Target value of daily average temperature difference A: Cumulative value of logging data of intake / discharge seawater temperature difference B: Current time

  The value H indicates an average output value that allows operation for the remaining time. In this embodiment, the output average value H that can be operated for the remaining time corresponds to the “average value of the generator output value in the remaining period” according to the present invention. The output average value H that can be operated for the remaining time indicates the average value of the generator output values that need to be operated for the remaining time in order to achieve the target value E of the temperature difference daily average value.

  The output average value H operable for the remaining time is, for example, the instantaneous value C of the current intake / exhaust port seawater temperature difference, the current generator output value D, the average value G of the intake / discharge port seawater temperature difference operable for the remaining time, And it can be calculated by calculating the following equation (3) based on the rate of change X of the intake / outlet seawater temperature difference per 1 MW.

H = D + (GC) / X (3)
H: Average value of the output that can be operated for the remaining time D: Current generator output value G: Average value of the seawater temperature difference of the intake and discharge ports that can be operated for the remaining time C: Instantaneous value of the present seawater temperature difference of the intake and discharge X: 1 MW Rate of change of seawater temperature difference per outlet

  The rate of change X of the inlet / outlet seawater temperature difference per MW corresponds to the “change rate of the inlet / outlet seawater temperature difference per unit output in the generator 103” according to the present invention, and can be calculated based on the actual results. it can. The calculation of the rate of change X of the intake / outlet seawater temperature difference per MW is based on the precondition that the seawater flow rate and the temperature of steam exchanged with heat are constant when the generator output value changes.

  Based on these preconditions, the rate of change X of the intake / outlet seawater temperature difference per MW is calculated by comparing the generator output value Dt1 and the intake / outlet seawater temperature difference Xt1 at the first time t1 with the first time t1. By calculating the following equation (4) based on the generator output value Dt2 (where Dt2 <Dt1) and the intake / outlet seawater temperature difference Xt2 (where Xt2 <Xt1) at different second times t2. Can be calculated.

    X = (Xt1-Xt2) / (Dt1-Dt2) (4)

  Specifically, for example, when the generator output value Dt1 is 300 MW, the intake / discharge port seawater temperature difference Xt1 is 7.0 ° C., and when the generator output value Dt2 is 200 MW, the intake / discharge port seawater temperature difference Xt2 is 5. In the case of 0 ° C., the rate of change X of the inlet / outlet seawater temperature difference per MW can be calculated as follows.

X = (7.0 ° C.-5.0 ° C.) / (300 MW-200 MW)
= 0.02 ° C / MW

  As described above, based on the precondition that the steam temperature exchanged with the seawater flow when the generator output value changes is constant, the rate of change X of the inlet / outlet seawater temperature difference per 1 MW is an arbitrary 2 If the generator output value and the intake / outlet seawater temperature difference at two times (time) are known, they can be obtained in advance or at the time of execution of the temperature difference monitoring.

  The value I indicates a predicted value of the intake / outlet seawater temperature difference when the generator 103 is operated at the rated output value. When the constant generator 103 is operated at the rated output value, the predicted value I of the seawater temperature difference between the intake and discharge ports is determined by setting the generator output value to the rated output value for the remaining time from the current time B to 24:00 on the day. It shows the average value of the predicted value of the average seawater temperature difference at one day (24 hours) when the operation of 103 is continued.

  When the constant generator 103 is operated at the rated output value, the predicted value I of the intake / discharge port seawater temperature difference is, for example, a current generator output value D, an instantaneous value C of the current intake / discharge port seawater temperature difference, and a value per 1 MW. It can be calculated by calculating the following equation (5) based on the change rate X of the intake / outlet seawater temperature difference and the known rated output value of the generator 103.

I = C + (Y−D) × X (5)
I: Predicted value of inlet / outlet seawater temperature difference at rated output C: Instantaneous value of current inlet / outlet seawater temperature difference D: Current generator output value X: Change in inlet / outlet seawater temperature difference per MW Rate Y: Rated output value of generator 103

  The value J indicates a result of determination as to whether or not the generator output value is acceptable. The judgment result J on whether or not the generator output value is acceptable is based on whether the target value E of the temperature difference daily average can be achieved or not when the operation of the generator 103 is continued with the current generator output value. The result of the judgment is shown. Specifically, the determination result J on whether or not the generator output value is possible can be realized by a sentence (text data) such as, for example, “the current output is OK” or “the load needs to be suppressed”. Alternatively, the value J may be realized by a symbol such as “O” or “X”.

  The value K indicates the generator output value after the change, which is changed due to the necessity of the change based on the value J. The value L indicates an operation time for operating the generator 103 with the changed generator output value K. The generator output value K and the operating time L after the change are set to arbitrary values by the administrator of the temperature difference management support device 200 or the like when it is necessary to change the generator output value K and the operation time L, respectively. The administrator of the temperature difference management support apparatus 200 sets the changed generator output value K and operating time L when it is determined that continuous operation cannot be performed with the current generator output value.

  The value M indicates a generator output value during a period other than the operation time L. In this embodiment, the generator output value M during the period other than the operation time L corresponds to the “generator output value during the period other than the operation time L of the remaining period” according to the present invention.

  The generator output value M in a period other than the operation time L is the generator output value K in the remaining time from the time when the calculation based on the generator output value K and the operation time L is performed to 24:00 on the day, and , The generator output value required to achieve the target value E of the daily temperature difference when the generator 103 is operated during the operation time L. That is, if the generator output value M during a period other than the operation time L is a positive value, at least one of the generator output value K and the operation time L can be increased, and the generator output value can be increased.

  Specifically, the generator output value M during the period other than the operation time L is the total of the generator output value K, the operation time L, the target value E of the temperature difference daily average value, and the logging data of the seawater temperature difference at the intake and discharge ports. Based on the value A, the current generator output value D, the current time B, and the rate of change X of the inlet / outlet seawater temperature difference per MW, the following formula (6) is used to calculate the value. Can be.

M =
(E × 24−A − ((DC−D) × X + C) × TC) / (24−B−TC) −C)
/ (X + D) (6)
DC: Generator output value after fluctuation TC: Operating time E: Target value A: Cumulative value D: Current generator output value X: Change rate of intake / outlet seawater temperature difference per MW C: Current generator output Value B: Current time

(Functional configuration of temperature difference management support device 200)
Next, a functional configuration of the temperature difference management support device 200 will be described. FIG. 4 is a block diagram showing a functional configuration of the temperature difference management support device 200. 4, the function of the temperature difference management support device 200 is realized by an acquisition unit 401, a storage unit 402, a temperature difference calculation unit 403, a reception unit 404, an output value calculation unit 405, and an output unit 406. Is done.

  The acquisition unit 401 acquires a cumulative value of the difference between the intake seawater temperature and the discharge seawater temperature from the start time of the predetermined period to the current time. That is, the acquisition unit 401 acquires the cumulative value A of the logging data of the intake / outlet seawater temperature difference. In this embodiment, the acquisition unit 401 can be realized by the CPU 201 and the input / output I / F 203 described above.

  The storage unit 402 stores the cumulative value acquired by the acquisition unit 401. Specifically, the storage unit 402 stores the logging data included in the accumulated value and information on the date and time when the logging data was measured in association with each other. In this embodiment, the storage unit 402 can be realized by the memory 202 described above.

  The temperature difference calculation unit 403 calculates the average value of the intake / outlet seawater temperature difference for a predetermined period based on the cumulative value A of the logging data of the intake / outlet seawater temperature difference acquired by the acquisition unit 401 and the current time B. The average value of the intake / outlet seawater temperature difference in the remaining period after the current time in the predetermined period is calculated so as to be equal to or less than the target value.

  Specifically, the temperature difference calculation unit 403 calculates the above equation (2), for example, and calculates the average value G of the intake / exhaust port seawater temperature difference that can be operated for the remaining time, and calculates the average value of the intake / exhaust port seawater temperature difference in the remaining period. Calculated as the average value of In this embodiment, the temperature difference calculation unit 403 can be realized by the CPU 201 and the memory 202 described above. The storage unit 402 may accumulate and store the average value G of the intake / discharge port seawater temperature difference operable for the remaining time calculated by the temperature difference calculation unit 403.

  The receiving unit 404 receives the settings of the generator output value K and the operating time L after the change. The receiving unit 404 may receive the operation time L by receiving the start time and the end time of the operation time L. The storage unit 402 may store the generator output value K and the operating time L after being changed by the receiving unit 404.

  The output value calculation unit 405 calculates the average value G of the operable intake / exhaust port seawater temperature difference calculated by the temperature difference calculation unit 403, the current generator output value D, and the output per unit output of the generator 103. The average value of the generator output value in the remaining period is calculated based on the change rate of the intake / outlet seawater temperature difference. Specifically, the output value calculation unit 405 calculates the output average value H that can be operated for the remaining time, for example, by calculating the above equation (2).

  When the receiving unit 404 receives the changed generator output value K and the operating time L, the output value calculating unit 405 further calculates the average of the intake / outlet seawater temperature difference in a predetermined period based on the values K and L. The generator output value in a period other than the operation time L in the remaining time is calculated so that the value is equal to or less than the target value.

  The output value calculation unit 405 calculates, for example, the generator output value in a period other than the operation time L among the remaining periods, that is, the output average value H operable during the remaining time, by calculating the above-described equation (6). calculate. In this embodiment, the output value calculation unit 405 can be realized by the CPU 201 and the memory 202 described above. The storage unit 402 may accumulate and store the output average value H operable for the remaining time calculated by the output value calculation unit 405.

  The temperature difference calculation unit 403 is configured to calculate, based on the cumulative value acquired by the acquisition unit 401, the seawater temperature difference between the intake and discharge ports when the power is generated at the same generator output value as the current generator output value D in the remaining time. The predicted value F of the temperature difference daily average, which is the average value of 2, may be calculated. This makes it possible to determine whether or not the operation of the generator 103 can be continued at the same generator output value as the current generator output value.

  The output unit 406 outputs the average value calculated by the output value calculation unit 405. The output unit 406 outputs, to the display device, for example, display information for displaying the values A to M including the average value calculated by the output value calculation unit 405 on the display screen 300 of the display device. Further, when the second average value is calculated by the temperature difference calculation unit 403, the output unit 406 may output display information including the second average value. In this embodiment, the output unit 406 can be realized by the CPU 201 and the input / output I / F 203 described above.

  In the above-described embodiment, the receiving unit 404 receives both the changed generator output value K and the operating time L, but the present invention is not limited to this. The receiving unit 404 may receive only the generator output value K after the change. In this case, an operation time calculation unit (not shown), not shown, is provided as a functional block, and the operation time calculation unit calculates the operation time that can be operated with the changed generator output value in the remaining period. You may make it.

  Specifically, in the remaining period, the operating time L ′ that can be operated with the changed generator output value K is, for example, the changed generator output value K received by the reception unit 404 and the temperature difference calculation unit 403. It can be calculated based on the calculated average value and the change rate (change rate X) of the intake / outlet seawater temperature difference per unit output in the generator 103. The operation time calculation unit can be realized by, for example, the CPU 201 and the memory 202 described above.

(Processing procedure of temperature difference management support device 200)
Next, a processing procedure of the temperature difference management support device 200 will be described. FIG. 5 is a flowchart illustrating a processing procedure of the temperature difference management support device 200. In the flowchart of FIG. 5, first, the process waits until the timing of the temperature difference calculation comes (step S501: No). In step S501, it is determined whether "every hour" has arrived, such as "1:00 am" or "1:00 pm".

  In step S501, when the timing of the temperature difference calculation has come (step S501: Yes), the current time B is acquired (step S502). In step S502, for example, the current time B is acquired in units of 60 minutes. Specifically, if "1:00 am", "1:00" is acquired as the current time, and if "1:00 pm", "13:00" is acquired as the current time.

  Further, a cumulative value A of the logging data of the intake / outlet seawater temperature difference at the current time B acquired in step S502 is acquired (step S503). In step S503, for example, if the seawater temperature difference at the outlet at 1:00 is 7.1 ° C., a cumulative value of “7.1 (° C.)” is obtained in step S503.

  In step S503, for example, if the current time acquired in step S502 is 3:00 am (3:00), three pieces of logging data are acquired, and the total value of the three pieces of logging data is , Is obtained as the cumulative value A of the logging data of the seawater temperature difference between the intake and discharge ports. Specifically, for example, the seawater temperature difference at 7.1 o'clock at 7.1 o'clock is 6.5 ° C at 2 o'clock, and the seawater temperature difference at 6.5 o'clock at 3:00 o'clock. If it is ° C, a cumulative value of “19 (° C)” is obtained.

  Further, an instantaneous value C of the current intake / outlet seawater temperature difference is obtained (step S504). In step S504, as described above, the intake / discharge port seawater temperature difference (or the average value during the predetermined period) that is continuously stable for a predetermined period of time such as 5 minutes is calculated as the current intake / discharge port seawater temperature difference. Obtained as the instantaneous value C.

  In addition, a generator output value at a point in time that is a predetermined time earlier than a point in time when the current instantaneous value C of the current intake / outlet seawater temperature difference obtained in step S504 is measured is obtained as a current generator output value D (step S505). ). As a result, the generator output value is obtained in consideration of the delay from the time when the seawater is subjected to heat exchange with steam in the condenser 104 at the time when the current instantaneous value C of the seawater temperature difference between the intake and discharge ports is obtained. can do. That is, it is possible to acquire the generator output value at the time point when the instantaneous value C of the current intake / outlet seawater temperature difference acquired in step S504 is measured.

  Further, the target value E of the daily temperature difference is acquired (step S506). As described above, the target value E of the temperature difference daily average is set to a value lower than the upper limit value determined based on agreements with local governments and the like. The processing of steps S502 to S506 may be performed before proceeding to the processing of step S507 and thereafter, and any processing may be performed first, and the order does not matter.

  Next, a predicted value F of the temperature difference daily average is calculated (step S507). In step S507, the operation of the generator 103 is continued for the remaining time until 24:00 of the day including the current time B acquired in step S502, with the current generator output value D acquired in step S505. In this case, a predicted value of an average intake / outlet seawater temperature difference in one day (24 hours) is calculated. Specifically, in step S507, the predicted value F of the average daily temperature difference is calculated by calculating the equation (1).

  Further, in order to achieve the target value E of the temperature difference daily average value, the average value G of the intake / discharge port seawater temperature difference operable for the remaining time is calculated (step S508). Specifically, in step S508, the target value E of the temperature difference daily average value acquired in step S506, the current time B acquired in step S502, and the intake / outlet seawater temperature difference acquired in step S503 are obtained. By calculating the above equation (2) based on the cumulative value A of the logging data, the average value G of the intake / exhaust port seawater temperature difference operable for the remaining time is calculated.

  Further, in order to achieve the target value E of the temperature difference daily average value, the output average value H that can be operated for the remaining time is calculated (step S509). Specifically, in step S509, the current generator output value D obtained in step S505, the average value G of the intake / discharge port seawater temperature difference that can be operated for the remaining time calculated in step S507, and the current value obtained in step S503. Based on the present instantaneous value C of the seawater temperature difference between the intake and discharge ports, the above-mentioned equation (3) is operated to calculate the output average value H that can be operated for the remaining time.

  Next, a predicted value I of the inlet / outlet seawater temperature difference when the generator output value becomes the rated output value is calculated (step S510). Specifically, in step S510, the current generator output value D acquired in step S505, the current instantaneous value C of the intake / outlet seawater temperature difference acquired in step S504, the intake / outlet seawater temperature per 1 MW. Based on the change rate X of the difference and the known rated output value of the generator 103, the above formula (5) is calculated to calculate the predicted value I of the intake / outlet seawater temperature difference.

  Then, when the operation is continued with the current generator output value, it is determined whether or not a target daily average intake / outlet seawater temperature difference can be achieved (step S511). In step S511, the average value G of the intake / outlet seawater temperature difference that needs to be operated for the remaining time calculated in step S507, the instantaneous value C of the current intake / outlet seawater temperature difference obtained in step S504, Are compared, and it is determined whether the achievable value is achievable based on which value is larger.

  Specifically, for example, when the average value G of the intake / exhaust port seawater temperature difference that needs to be operated for the remaining time is larger than the current instantaneous value C of the current intake / exhaust port seawater temperature difference, it is determined that the operation can be achieved. I do. Further, specifically, for example, when the average value G of the intake / exhaust port seawater temperature difference that needs to be operated for the remaining time is smaller than the current instantaneous value C of the current intake / exhaust port seawater temperature difference, it cannot be achieved. Judge that there is.

  Note that the processing of steps S506 to S511 may be performed after step S506 and before proceeding to the processing of step S512 and thereafter, and any of the processing may be performed first. The order of steps S506 to S511 does not matter.

  If it is determined in step S511 that it is achievable (step S511: Yes), the values A to E obtained in steps S502 to S505, the values FI to I calculated in steps S506 to S510, and the step The determination result (value J) in S511 is output (step S512), and the series of processing ends. In step S512, specifically, display information for displaying the values A to I and that the generator 103 can be operated without changing the current generator output value (value J). Output to the display device.

  Accordingly, the display device controls the display screen 300 based on the display information from the temperature difference management support device 200 to display the display screen 300. The value J on the display screen 300 at this time is indicated by, for example, a character such as “OK if the current output is OK”. The administrator or the like of the temperature difference management support device 200 can easily and reliably grasp that the change of the generator output value is unnecessary based on the value J.

  On the other hand, if it is determined in step S511 that it is not possible to achieve (step S511: No), the values A to E obtained in steps S502 to S506 and the values F to I calculated in steps S507 to S510 are obtained. , And outputs the determination result (value J) in step S511 (step S513). In step S513, specifically, display information for displaying the values A to I and the necessity of changing the current generator output value (value J) is output to the display device. .

  Thereby, the display device controls the display screen 300 based on the display information from the temperature difference management support device 200, and displays the display screen 300 as shown in FIG. The value J on the display screen 300 at this time is indicated by, for example, a character such as “load suppression is required”. The administrator of the temperature difference management support device 200 can easily and reliably grasp that the generator output value needs to be changed based on the value J.

  When the temperature difference management support device 200 indicates that the generator output value needs to be changed for the operation of the power plant, a calculation instruction of the generator output value is input to the temperature difference management support device 200. The calculation instruction of the generator output value is input, for example, by inputting a specific numerical value after the change into the values K and L columns on the display screen 300 displayed based on the display information output in step S513, such as "execute". This can be realized by performing an instruction operation.

  After outputting the display information in step S513, the temperature difference management support apparatus 200 waits until it receives a generator output value calculation instruction (step S514: No). In step S514, specifically, for example, based on an input signal from an input device, it is determined whether or not an instruction operation for instructing calculation of a generator output value has been received.

  When the calculation instruction of the generator output value is received in step S514 (step S514: Yes), it is determined whether the changed generator output value K and the operating time L are set (step S515). In step S515, even if the calculation instruction of the generator output value is received, if the changed generator output value K and the operating time L are not set (step S515: No), the changed generator output value K and In a state where the operation time L is set, the operation waits until an instruction to calculate the generator output value is received.

  In step S514, when the calculation instruction of the generator output value is received in the state where the changed generator output value K and the operation time L are set (step S515: Yes), the set generator output after change is set. A generator output value is calculated based on the value K and the operation time L (step S516). In step S516, during the remaining time from the time when the calculation based on the set values K and L is performed to 24:00 on the day, the generator output value K after the change and the power generation during the operation time L When the generator 103 is operated, a generator output value necessary to achieve the target value E of the daily temperature difference is calculated.

  Thereafter, display information for displaying the generator output value calculated in step S516 is output to the display device (step S517), and the series of processing ends. The display device controls the display screen 300 based on the display information from the temperature difference management support device 200, and displays the display screen 300 shown in FIG. At this time, on the display screen 300, specific numerical values of the values K to M are displayed in addition to the values A to J displayed in step S513. Thereby, the administrator of the temperature difference management support device 200 needs to operate the generator with the changed generator output value K and the operating time other than L based on the generator output value M during the period other than the operating time L. A simple generator output value can be grasped easily and reliably.

  In the above-described embodiment, when the operation is continued at the current generator output value, and when the target average daily intake / outlet seawater temperature difference cannot be achieved, the changed generator output value The input of K and the operation time L is received, and the generator output value M in a period other than the operation time L is calculated based on the received values K and L. However, the present invention is not limited to this. The calculation of the generator output value can be performed even when the operation is continued at the current generator output value or when the target daily average intake / outlet seawater temperature difference can be achieved. Good.

  Thereby, for example, when the generator output value is smaller than the rated output value, it is possible to perform an operation to approach the rated output value. As a result, power can be efficiently generated.

  In the above-described embodiment, the difference between the intake and discharge seawater temperature in the thermal power plant 100 including one generator 103 and the condenser 104 for one set of the intake 109 and the discharge 111 is determined by the temperature. Although the example in which the difference management support device 200 is to be managed has been described, the present invention is not limited to this. For example, the temperature difference between the intake and discharge seawater in the thermal power plant 100 provided with a plurality of generators 103 and the condenser 104 for one set of the intake 109 and the discharge 111 is the management target of the temperature difference management support device 200. It may be.

  For example, with respect to one set of intake 109 and outlet 111, the temperature of the seawater discharged and discharged in a thermal power plant 100 including two generators 103 and two condensers 104 corresponding to each generator 103. When the difference is to be managed by the temperature difference management support device 200, the values A to C and E can be obtained in the same manner as described above. As the current generator output value D, a current generator output value of each of the two generators 103 is obtained, and the sum is used. Thus, using these values A to E, values F to I can be calculated in the same manner as described above.

  The generator output value K after the change may be set for only one of the generators 103 or may be set for both of the generators. When the temperature difference between the intake and discharge seawater in a thermal power plant having a plurality of generators 103 is to be managed by the temperature difference management support device 200, a time period during which operation is to be performed at the rated output value is further set. This ensures the generator 103 operating at the rated output value, and adjusts the generator output value of each of the plurality of generators 103 to adjust the intake / outlet seawater temperature difference. The power generation efficiency of the whole can be improved.

  When the temperature difference between the intake and discharge seawater in a thermal power plant having a plurality of generators 103 is to be managed by the temperature difference management support device 200, the remaining time operation is possible except for the operation at the rated output value. Output average value H. In this case, the output average value H operable for the remaining time indicates a value relating to any one of the generators 103.

  When the temperature difference between the intake and discharge seawater in a thermal power plant having a plurality of generators 103 is to be managed by the temperature difference management support device 200, the time during which the load needs to be suppressed and the difference between the intake and discharge seawater temperature are reduced. Alternatively, a determination result as to whether or not the thermal power plant as a whole can achieve the target value E of the temperature difference daily average value may be output.

  As described above, the temperature difference management support device 200 according to the embodiment of the present invention provides the intake / discharge port indicating the difference between the intake seawater temperature and the discharge seawater temperature from the start time of the predetermined period to the current time. Based on the cumulative value A of the seawater temperature difference and the current time B, the remaining value of the remaining time after the current time B in the predetermined period is set so that the average value of the intake / outlet seawater temperature difference in the predetermined period is equal to or less than the target value E. The average value G of the seawater temperature difference between the intake and discharge ports in the period is calculated. Then, based on the calculated average value G, the current generator output value D, and the rate of change X of the intake / outlet seawater temperature difference per unit output in the generator 103, the generator output in the remaining period An average value H of the values is calculated, and the calculated average value H is output.

  According to the temperature difference management support device 200 of the embodiment according to the present invention, the average value of the generator output value is calculated in consideration of the change rate of the intake / outlet seawater temperature difference per unit output in the generator 103. Thereby, for example, the seawater temperature difference between the intake and discharge ports can be managed in a unit of unit output such as 1 MW. As a result, it is possible to precisely manage the seawater temperature difference between the intake and discharge ports.

  By precisely controlling the seawater temperature difference between the intake and discharge ports in this way, the temperature difference between the intake and discharge ports 111 can be controlled in fine units such as 0.1 ° C. units, and the power supply request can be controlled in units of 1 MW or the like. It can be handled in units of unit output. Thereby, it is possible to respond to the request for power supply in a detailed manner while observing the temperature difference of the water discharge and discharge determined based on the agreement with each local government.

  As described above, since the intake / outlet seawater temperature difference can be precisely managed, the generator 103 can be operated without suddenly decreasing the output of the generator 103. As a result, the efficiency of power generation can be improved, and accordingly, it is possible to respond to the power supply request in a detailed manner while observing the temperature difference between the discharged and discharged water determined based on agreements with each local government.

  Further, according to the temperature difference management support device 200 of the embodiment according to the present invention, the seawater temperature difference between the intake and discharge ports can be precisely managed without being influenced by the experience of the operator. As a result, the burden on the worker can be reduced, and the working efficiency can be improved.

  In addition, the temperature difference management support device 200 according to the embodiment of the present invention includes a generator output value and an intake / outlet seawater temperature difference at a first time, and a power generation at a second time different from the first time. The value calculated by the above equation (4) based on the machine output value and the seawater temperature difference between the intake and discharge ports is set as the rate of change X.

  According to the temperature difference management support apparatus 200 of the embodiment according to the present invention, the release per unit output in the generator 103 is performed on the assumption that the seawater flow rate and the temperature of steam exchanged with heat are constant. The rate of change of the mouth opening seawater temperature difference can be easily calculated. Thus, the load on the temperature difference management support device 200 for calculating the change rate or the burden on the operator can be reduced, and the seawater temperature difference between the intake and discharge ports can be precisely managed.

  In addition, the temperature difference management support device 200 according to the embodiment of the present invention, when accepting the setting of the generator output value after the change and the operation time for operating the generator 103 with the generator output value after the change, On the basis of the generator output value and the operation time after the change, the average value of the seawater temperature difference between the intake and discharge ports in the predetermined period is equal to or less than the target value, and the remaining period is a period other than the operation time L. It is characterized in that a generator output value is calculated.

  According to the temperature difference management support device 200 of the embodiment according to the present invention, the generator 103 is operated with the set arbitrary generator output value during the set arbitrary operation time in the remaining period. Can be. As a result, it is possible to respond more finely to the power supply request while observing the temperature difference of the water discharge and discharge determined based on the agreement with each local government.

  Further, the temperature difference management support device 200 according to the embodiment of the present invention is characterized in that the generator output value during a period other than the operation time L is calculated by the above equation (6).

  According to the temperature difference management support device 200 of the embodiment according to the present invention, it is possible to easily calculate the generator output value during a period other than the operation time L.

  Further, the temperature difference management support device 200 according to the embodiment of the present invention is characterized in that the operation time is received by receiving the start time and the end time of the operation time.

  According to the temperature difference management support device 200 of the embodiment according to the present invention, it is possible to operate the generator 103 with the set arbitrary generator output value in the set arbitrary time zone in the remaining period. it can. As a result, it is possible to respond more finely to the power supply request while observing the temperature difference of the water discharge and discharge determined based on the agreement with each local government.

  In addition, when only the setting of the generator output value after the change is received, the temperature difference management support device 200 according to the embodiment of the present invention, the generator output value after the change and the temperature difference calculation unit 403 Based on the calculated average value and the rate of change of the intake / outlet seawater temperature difference per unit output in the generator 103, an operation time in which operation is possible with the changed generator output value in the remaining period is calculated. It is characterized by doing so.

  According to the temperature difference management support device 200 of the embodiment according to the present invention, it is possible to calculate the operation time during which the generator 103 can be operated with the set arbitrary generator output value in the remaining period. . Thereby, it is possible to respond to the power supply request while observing the temperature difference of the water discharge and discharge determined based on the agreement with each local government.

  In addition, the temperature difference management support device 200 according to the embodiment of the present invention, based on the cumulative value of the logging data, performs the processing when the power is generated with the same generator output value as the current generator output value in the remaining time. A second average of the outlet seawater temperature difference is calculated and output.

  According to the temperature difference management support device 200 of the embodiment according to the present invention, it is determined at the current time whether or not it is possible to continuously generate power with the same generator output value as the current generator output value. can do. As a result, the generator output value can be adjusted at an early stage, and it is necessary to respond to power supply requests in a detailed manner while complying with the temperature difference between the water discharge and discharge determined based on agreements with local governments. Can be.

  The temperature difference management support method described in each of the above embodiments can be realized by executing a prepared temperature difference management support program on a computer such as a personal computer or a workstation. This program is recorded on a computer-readable recording medium such as a hard disk, a CD-ROM, a DVD, and an SSD, and is executed by being read from the recording medium by the computer. Further, the temperature difference management support program may be a transmission medium that can be distributed via a network such as the Internet.

  As described above, the temperature difference management support device and the temperature difference management support program according to the present invention provide a temperature difference management support device for managing the temperature difference between the temperature at the time of water intake and the temperature at the time of water discharge used for power generation. Temperature difference management support device and a temperature difference management support program for managing a temperature difference between a temperature at the time of intake and a temperature at the time of discharge of cooling seawater used for thermal power generation. Suitable for.

REFERENCE SIGNS LIST 100 Thermal power plant 101 Boiler 102 Turbine 103 Generator 104 Condenser 109 Intake 111 Outlet 401 Acquisition unit 402 Storage unit 403 Temperature difference calculation unit 404 Reception unit 405 Output value calculation unit 406 Output unit

Claims (8)

From the start time of the predetermined period to the current time, an acquisition unit that acquires the cumulative value of the intake seawater temperature difference indicating the difference between the intake seawater temperature and the discharge seawater temperature,
Based on the accumulated value and the current time obtained by the obtaining unit, the residual value after the current time in the predetermined period is set so that the average value of the intake / outlet seawater temperature difference in the predetermined period is equal to or less than a target value. A temperature difference calculation unit that calculates an average value of the seawater temperature difference between the intake and discharge ports during the period of
Based on the average value calculated by the temperature difference calculator, the generator output value at the current time, and the rate of change of the intake / outlet seawater temperature difference per unit output in the generator, the power generation in the remaining period An output value calculation unit that calculates an average value of the machine output values,
An output unit that outputs an average value calculated by the output value calculation unit,
A temperature difference management support device comprising: The rate of change is defined as a generator output value and an intake / discharge port seawater temperature difference at a first time, and a generator output value and an intake / discharge port seawater temperature difference at a second time different from the first time. The temperature difference management support device according to claim 1, wherein the temperature difference management value is a value calculated based on the following equation.
X = (Xt1-Xt2) / (Dt1-Dt2)
X: Change rate of intake / outlet seawater temperature difference per unit output Dt1: Generator output value at first time Xt1: Intake / outlet seawater temperature difference at first time Dt2: Generator output at second time t2 Value (However, Dt2 <Dt1)
Xt2: Intake / outlet seawater temperature difference at the second time t2 (where Xt2 <Xt1) The generator output value after the change and a receiving unit that receives the setting of the operation time to operate the generator with the generator output value after the change,
The output value calculation unit, based on the generator output value and the operating time after the change received by the receiving unit, so that the average value of the intake and discharge port seawater temperature difference in the predetermined period is equal to or less than a target value, The temperature difference management support device according to claim 1, wherein a generator output value in a period other than the operation time in the remaining period is calculated. The generator output value during a period other than the operation time is a changed generator output value and operation time received by the reception unit, the target value, the cumulative value acquired by the acquisition unit, and the current time. 4. The temperature difference management support device according to claim 3, wherein the temperature difference management support device is a value calculated by the following mathematical expression based on the generator output value, the current time, and the change rate.
(E × 24−A − ((DC−D) × X + C) × TC) / (24−B−TC) −C)
/ (X + D)
DC: Generator output value after fluctuation TC: Operating time E: Target value A: Cumulative value D: Generator output value at current time X: Change rate C: Generator output value at current time B: Current time   4. The temperature difference management support device according to claim 3, wherein the receiving unit receives the operation time by receiving a start time and an end time of the operation time. 5. A receiving unit that receives the setting of the generator output value after the change,
Based on the generator output value after the change received by the receiving unit, the average value calculated by the temperature difference calculating unit, and the rate of change of the intake / outlet seawater temperature difference per unit output in the generator. An operating time calculation unit that calculates an operable operating time with the changed generator output value in the remaining period,
The temperature difference management support device according to claim 1 or 2, further comprising: The temperature difference calculation unit, based on the cumulative value acquired by the acquisition unit, in the remaining time, when the generator output value at the current time and the generator output value at the same time of the intake and discharge port seawater temperature difference Calculate a second average,
The said output part outputs the information regarding the magnitude relationship of the 2nd average value calculated by the said temperature difference calculation part, and the said predetermined threshold value, The Claims any one of Claims 1-6 characterized by the above-mentioned. Temperature difference management support device. On the computer,
From the start time of the predetermined period to the current time, the cumulative value of the intake seawater temperature difference indicating the difference between the intake seawater temperature and the discharge seawater temperature,
On the basis of the acquired cumulative value and the current time, the data for the remaining time period after the current time in the predetermined time period is set so that the average value of the inlet / outlet seawater temperature difference in the predetermined time period is equal to or less than the target value. Let the average value of the outlet seawater temperature difference be calculated,
Based on the calculated average value, the generator output value at the current time, and the rate of change of the intake / outlet seawater temperature difference per unit output in the generator, the average value of the generator output value in the remaining period Is calculated,
Output the calculated average value,
A temperature difference management support program for executing a process.

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