JP2013209897A - Monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform operation by which a temperature difference between an intake and an outlet satisfies an agreement value.SOLUTION: A monitoring system (1) includes an automatic control determination part (212) that determines the number of a circulation pump (140) in which an average temperature difference within a predetermined time is equal to or lower than a threshold according to an average temperature difference up to the present to monitor the average temperature difference within the predetermined time for taking in and discharging water, and equipment control parts (214, 30) that perform the circulation of water between the determined number of circulation pumps, in a power generation facility in which water taken out from an intake (110) is circulated by the circulation pump (140) and discharged from an outlet (120).

Description

  The present invention relates to a monitoring system for monitoring a temperature difference of intake water in a power generation facility.

  In the power generation facility of a thermal power plant, steam used for turbine rotation is cooled with seawater (cooling water) taken from a water inlet, and steam is reused by returning it to water. At this time, seawater used for cooling the steam is returned to the sea from the outlet.

  Here, in the thermal power plant, in order not to affect the coastal environment, the temperature difference per hour between the temperature of the seawater at the intake and the temperature of the seawater at the outlet is below the agreed value ( For example, the power generation facility must be operated so as to be 7 ° C. or less.

  As a monitoring system for monitoring the temperature difference between the intake and discharge ports, a monitoring system as in Patent Document 1 is known. In the monitoring system of Patent Document 1, the moving average of the temperature difference between the intake and discharge ports is calculated, and the operation status of the remaining time is presented in the operation per hour (FIG. 17).

JP 2010-026632 A

  In the monitoring system described in Patent Document 1, while the driving situation of the remaining time is presented and the driving according to the driving situation is automatically performed (FIG. 18), there is room for further improvement.

  Then, an object of this invention is to provide the monitoring system which performs the more suitable driving | operation for the temperature difference of a discharge port to satisfy | fill an agreement value.

  (1) A monitoring system that monitors the average temperature difference within a specified time period of intake water in a power generation facility that circulates water taken from the intake port with a circulation pump and discharges water from the discharge port. Accordingly, an automatic control determining unit that determines the number of the circulating pumps for which the average temperature difference within the predetermined time is equal to or less than a threshold value, and water between the discharge ports by the number of the circulating pumps determined by the automatic control determining unit. And a device control unit that circulates the system.

  According to the monitoring system of (1), the number of circulating pumps in which the average temperature difference from the hour to the hour is less than the agreed value is determined according to the average temperature difference up to the present, and the number of circulating pumps determined Circulate seawater. As a result, the flow rate of the seawater circulating in the intake and discharge system changes according to the average temperature difference up to now, for example, when the average temperature difference greatly exceeds the agreed value, it is possible to circulate a lot of seawater. it can. As a result, depending on the average temperature difference, the speed at which the temperature difference of the seawater between the intake and outlet can be reduced can be varied, so that the average temperature difference from the hour to the hour meets the agreement value. It is possible to operate the power generation equipment.

  (2) A storage unit that stores a time period from when the load drop of the power generation facility starts until the temperature difference of the discharged water decreases by a predetermined value for each number of the circulating pumps, and the automatic control determination unit includes: The number of circulation pumps is determined according to the remaining temperature until the predetermined time elapses and the time for each number of circulation pumps in addition to the average temperature difference up to the present time. Monitoring system.

  Since the seawater taken from the intake port is discharged from the discharge port after circulating through the intake and discharge system, the decreasing rate of the temperature difference changes according to the flow rate of the seawater. That is, the temperature difference decreases faster when the flow rate of seawater is higher than when the flow rate is low. According to the monitoring system of (2), since the decrease rate of such a temperature difference is stored in the storage unit, only an appropriate number of circulation pumps can be operated according to the remaining time. The driving | running which satisfy | fills can be performed efficiently.

  (3) An input unit that receives an input from the administrator is provided, and the device control unit receives the input from the administrator via the input unit, and the number of the circulation pumps is between the discharge ports. The monitoring system according to (1) or (2), wherein the water is circulated.

  According to the monitoring system of (3), since the operation for reducing the temperature difference is performed according to the input from the manager, the power generation facility is operated so that the average temperature difference from the hour to the hour meets the agreed value. be able to.

  (4) According to the remaining time until the predetermined time elapses and the average temperature difference up to the present, the water is circulated between the intake and discharge ports using all the circulation pumps in the power generation facility. A limit time calculation unit that calculates a limit time at which an average temperature difference within a predetermined time is equal to or less than a threshold value, and the device control unit performs the input via the input unit on condition that the limit time is reached. The monitoring system according to (3), wherein water is circulated between intake and discharge ports using all the circulation pumps.

  According to the monitoring system of (4), even if there is no input from the manager, when the time limit is reached, the operation is automatically performed to reduce the temperature difference. Can be satisfied.

  According to the present invention, it is possible to perform an operation in which the temperature difference between the intake and discharge ports satisfies the agreed value.

It is a figure which shows the structure of the monitoring system of this invention. It is a figure which shows the intake / discharge system of power generation equipment. It is a figure which shows the various data memorize | stored in a memory | storage part. It is a figure which shows the function structure of the monitoring terminal which comprises a monitoring system. It is a figure which shows the display screen displayed on the administrator of a monitoring system. It is a figure which shows the outline | summary of the determination method of the number of circulation pumps. It is a figure which shows the outline | summary of the determination method of a limit time. It is a flowchart which shows the flow of a process of a monitoring system.

  Hereinafter, the monitoring system 1 of the present embodiment will be described with reference to the drawings. In the following embodiments, the monitoring system 1 monitors the difference between the temperature of seawater taken in at the intake port of the thermal power generation facility and the temperature of seawater discharged from the outlet port.

[Configuration of monitoring system 1]
The configuration of the monitoring system 1 will be described with reference to FIG. The monitoring system 1 includes a data collection server 10, a monitoring terminal 20, and a device control device 30. Here, the data collection server 10, the monitoring terminal 20, and the device control device 30 are in a state where data can be transmitted / received through an in-house network formed in the thermal power plant. In this embodiment, the monitoring system 1 is realized by three devices, that is, the data collection server 10, the monitoring terminal 20, and the device control device 30. However, the present invention is not limited to this. It may be realized by a device, or may be realized by a plurality of two or three or more devices.
Here, the monitoring system 1 in this embodiment monitors the temperature difference of the cooling water (seawater) used for the condenser of a thermal power generation facility. Then, with reference to FIG. 2, the intake / discharge system of the thermal power generation equipment in which the condenser is installed is demonstrated.

  As shown in FIG. 2, in the intake / discharge system 100, the intake port 110 and the discharge port 120 are connected by a pipe 130. A circulation pump 140 and a condenser 150 are installed in the pipeline 130. The condenser 150 exchanges heat between the steam that has driven the turbine 160 and the seawater that is the cooling water, and returns the steam to the water for recovery. Thereafter, the condenser 150 sends the returned water to a boiler (not shown). Thereby, the water which returned the steam is reused.

  The circulation pump 140 sucks the seawater required by the condenser 150 from the water inlet 110 and flows it to the condenser 150 through the pipe line 130. Then, the circulation pump 140 causes the seawater whose temperature has been increased by heat exchange of the condenser 150 to flow toward the water outlet 120 through the pipe line 130. A plurality of circulation pumps 140 are installed in the intake / discharge water system 100, and the flow rate of seawater in the pipeline 130 changes according to the number of circulation pumps 140 to be driven.

Here, the temperature difference between seawater at the time of water intake and at the time of water discharge is regulated to a value that does not affect the coastal environment. In this embodiment, the temperature difference is managed so that the average value of the seawater temperature difference from the hour to the hour does not exceed the agreed value (7 ° C.). When there is a possibility that the temperature difference exceeds the agreed value, the monitoring system 1 determines the number of circulation pumps 140 and the power generation equipment so that the average temperature difference from the hour to the hour falls within the agreed value as will be described later. Control power generation load.
For this purpose, in the intake and discharge system 100, temperature sensors 170 and 180 are installed at the intake port 110 and the discharge port 120, and the temperatures of the intake port 110 and the discharge port 120 are measured. The temperature sensor 170 measures the seawater temperature of the intake port 110 and outputs a measurement signal a representing the measurement result to the data collection server 10. Moreover, the temperature sensor 180 measures the seawater temperature of the outlet 120 and outputs a measurement signal b representing the measurement result to the data collection server 10.

  Returning to FIG. 1, the data collection server 10 collects and stores the measurement signals a and b from the temperature sensors 170 and 180, for example, every minute. The data collection server 10 calculates and stores the difference between the two temperatures. Thereby, the data collection server 10 converts the temperature of the seawater taken in from the water intake 110, the temperature of the seawater discharged from the water outlet 120, and the seawater temperature difference between the water intake 110 and the water outlet 120 into one minute intervals. Store as accumulated data. In this temperature accumulation data, the temperature is continuously recorded every minute for every day. The monitoring system 1 stores such temperature accumulation data for each power generation facility for a predetermined period.

  The monitoring terminal 20 monitors the temperature difference of seawater between the water intake 110 and the water discharge port 120, and includes a processing unit 21, a storage unit 22, a communication unit 23, an input unit 24, and a display unit 25. Composed. The communication unit 23 enables data communication with the data collection server 10 and the device control device 30 via the local network under the control of the processing unit 21. Accordingly, the processing unit 21 can communicate with the data collection server 10 and the device control device 30. The input unit 24 is an input device operated by an administrator, such as a keyboard or a mouse. The display unit 25 is a display device such as an LCD (Liquid Crystal Display) that displays data. The display unit 25 displays a monitoring result such as a temperature difference of seawater between the water intake port 110 and the water discharge port 120 under the control of the processing unit 21. Although not shown, the monitoring terminal 20 may be provided with an output device for printing out various data.

  The storage unit 22 is a storage device that stores various data input from the input unit 24, data received by the communication unit 23 from the data collection server 10, and the like. Moreover, the memory | storage part 22 has memorize | stored previously the various programs required for the general operation | movement of the monitoring terminal 20, and the program required for monitoring the temperature difference of seawater (FIG. 8).

  Furthermore, the memory | storage part 22 has also memorize | stored beforehand the various data used for control of the power generation equipment in case the seawater temperature difference of discharge water exceeds agreement value (7 degreeC) (refer FIG. 3). Here, various data stored in the storage unit 22 will be described with reference to FIG. 3. Note that the various data shown in FIG. 3 may change according to the season and the like, and therefore it is desirable that the various data be updated as appropriate with the operation of the power generation facility.

Since the seawater taken from the water intake 110 is used for cooling the steam that has driven the turbine 160, when the power generation load in the power generation facility is lowered, the seawater between the water intake 110 and the water outlet 120 is then used. The temperature difference will be reduced. At this time, since the flow rate of the seawater taken from the intake port 110 varies depending on the number of circulating pumps 140 driven, the rate of decrease in the seawater temperature difference accompanying a load drop also varies depending on the number of circulating pumps 140 driven. .
Therefore, as shown in FIG. 3 (1), the storage unit 22 stores the time until the seawater temperature difference decreases by a predetermined value as the load of the power generation facility decreases, for each number of circulating pumps driven. Specifically, in the storage unit 22 of the present embodiment, when the load of the power generation facility (per axis) is lowered by 10 MW, the temperature difference of seawater between the water intake 110 and the water outlet 120 is 0. The time until the temperature decreases by 4 ° C. is stored for each number of circulating pumps. For example, when the number of circulating pumps is one, the temperature of seawater between the water intake 110 and the water outlet 120 after 24 minutes If the difference decreases by 0.4 ° C and the number of circulation pumps is 6, it is remembered that the temperature difference of the seawater between the water intake 110 and the water outlet 120 will decrease by 0.4 ° C after 5 minutes. ing. The data shown in FIG. 3 (1) is used for the processing unit 21 to control the power generation equipment in a situation where the temperature difference of the seawater between the water intake 110 and the water outlet 120 may exceed the agreed value. . That is, in this situation, the processing unit 21 is used to determine the number of circulating pumps to be driven (see FIG. 5).
In the present embodiment, only the data when the load of the power generation facility is lowered by 10 MW is stored in the storage unit 22, but the present invention is not limited to this, and the load drop amount is arbitrary such as 5 MW, 20 MW, etc. It may be a value. Therefore, the memory | storage part 22 is good also as memorize | storing the data similar to FIG. 3 (1) for every load fall amount of electric power generation equipment.

  Here, in the present embodiment, six circulation pumps 140 are installed in the intake and discharge water system 100. That is, in this embodiment, when the six circulation pumps 140 are driven, the temperature difference of the seawater between the water intake 110 and the water outlet 120 can be reduced by 0.4 ° C. the fastest. In other words, it takes at least 5 minutes to reduce the temperature difference by 0.4 ° C. At this time, in this embodiment, since it is supposed to manage the average value of the temperature difference of seawater from noon to noon, there is a margin of at least 5 minutes if there is a possibility of exceeding the agreed value Action needs to be taken. Therefore, in this embodiment, the decrease value of the temperature difference per minute when the six circulation pumps 140 are driven is stored in the storage unit 22 (FIG. 3 (2)), and the possibility of exceeding the agreed value is stored. If there is a limit time, it is used to calculate a limit time that must be dealt with (see FIG. 6).

  The processing unit 21 executes a program stored in the storage unit 22. The program executed by the processing unit 21 includes a monitoring processing program (FIG. 8) for monitoring the temperature difference of seawater. When the monitoring processing program is executed, the processing unit 21 calculates an average value of the temperature difference of seawater between the water intake 110 and the water outlet 120 from the reference time to the present based on various data acquired from the data collection server 10. Processing to determine the control content for the power generation facility when the calculated average value may exceed the agreed value, limit time that must be dealt with when the agreed value may be exceeded (ie At least a process of calculating a time during which the agreement value is not satisfied unless the six circulation pumps 140 are driven is executed. Therefore, the processing unit 21 includes an average calculation unit 211, an automatic control determination unit 212, a limit time calculation unit 213, and an output control unit 214 as shown in FIG.

The average calculation unit 211 calculates an average temperature difference from the reference time to the present based on the temperature difference of seawater between the water intake 110 and the water discharge port 120 acquired from the data collection server 10 at intervals of 1 minute. In the present embodiment, since the average temperature difference from the normal time (front) to the normal time (back) is managed, the normal time (front) is the reference time. Specifically, when managing the average temperature difference from the hour (2 o'clock) to the hour (3 o'clock), the hour (2 o'clock) is the reference time, and the average calculator 211 ) To the present average temperature difference.
In addition, the average calculation unit 211 calculates the remaining time at which the power generation facility should be operated when the average temperature difference from the reference time to the present time may exceed the agreed value. That is, an average temperature difference (hereinafter referred to as “Y”) necessary to satisfy the agreed value is calculated. The average temperature difference Y is calculated as follows: average temperature difference up to now (hereinafter referred to as “A”), time until now, remaining time (hereinafter referred to as “X”), agreed value (7 ° C.) Can be easily achieved, for example, by calculating an average temperature difference Y satisfying (A * (60−X) + Y * X) / 60 ≦ 7 ° C.
In the present embodiment, when the average temperature difference A from the reference time to the present time exceeds the agreed value, it is “possible” to exceed the agreed value (see S3 and 4 in FIG. 8). It is not limited. In order to achieve stricter management, there is a possibility of exceeding the agreed value when the average temperature difference A exceeds a predetermined ratio of the agreed value (for example, the average temperature difference 6.9 ° C with respect to the agreed value 7 ° C). Also, when the average temperature difference A is equal to or less than the agreed value but exceeds the predetermined temperature difference, and the current temperature difference exceeds the agreed value (for example, the average temperature difference 6.9 ° C., the current The temperature difference of 7.2 ° C) may exceed the agreed value.

The average temperature difference A calculated by the average calculation unit 211, the average temperature difference Y necessary to satisfy the agreed value, and the like are appropriately displayed on the display unit 25 via the output control unit 214 and notified to the administrator. An example of the display screen displayed on the display unit 25 is shown in FIG. FIG. 5 (1) is a display example displayed on the display unit 25 when the average temperature difference A is equal to or less than the agreed value. FIG. 5 (2) is a possibility that the average temperature difference A exceeds the agreed value. It is a display example displayed on the display unit 25 in some cases.
Referring to FIG. 5A, when the average temperature difference A is equal to or less than the agreed value, the display unit 25 displays the current temperature difference in addition to the average temperature difference A up to now, and the average temperature difference. Since A is below the agreed value, it is displayed that no corresponding operation is required.
In addition, referring to FIG. 5 (2), when there is a possibility that the average temperature difference A exceeds the agreed value, the display unit 25 satisfies the agreed value in addition to the average temperature difference A and the current temperature difference. In addition to the necessary average temperature difference Y and the time X required to operate at the average temperature difference Y, an automatic control button 251 and a limit time display 252 are displayed. The automatic control button 251 is a button that can be selected by an administrator, and on the condition that the automatic control button 251 is selected, the power generation equipment is controlled according to the control content determined by the automatic control determination unit 212 described later. As a result, the power generation equipment that satisfies the agreed value is controlled. The limit time display 252 displays a limit time (hereinafter referred to as “T2”) that must be dealt with when there is a possibility of exceeding the agreed value. If the administrator does not select the automatic control button 251 within the limit time T2, the operation of the power generation equipment that has driven the six circulation pumps 140 is automatically performed. That is, when the limit time T2 is reached, an operation capable of reducing the temperature difference as soon as possible is automatically performed.

Returning to FIG. 4, the automatic control determination unit 212 stores the data stored in the storage unit 22 when the average temperature difference A from the reference time calculated by the average calculation unit 211 to the present may exceed the agreed value. Based on (refer to FIG. 3 (1)), the control content of the power generation facility (hereinafter referred to as “automatic control content”) is determined. Here, the contents of automatic control include the load drop amount of the power generation equipment and the number of circulation pumps whose average temperature difference from the hour to the hour is equal to or less than the agreed value. At this time, in this embodiment, the load drop amount of the power generation facility is 10 MW, but the load drop amount of the power generation facility may be variable. The automatic control content can be determined by any method, an example of which is shown in FIG.
As shown in FIG. 3A, the storage unit 22 stores the time until the seawater temperature difference decreases by a predetermined value as the load of the power generation facility decreases for each circulation pump. Therefore, in FIG. 6, the time required for the average temperature difference during the remaining time X to reach the average temperature difference Y required to satisfy the agreed value from the current temperature difference (hereinafter referred to as “B”) ( Hereinafter, this is referred to as “T1”), and the number of circulation pumps satisfying this time T1 is determined. For example, when the remaining time X is “30 minutes”, the average temperature difference Y required to satisfy the agreed value is “6.8 ° C.”, and the current temperature difference B is “7.1 ° C.” 6, the time T1 is calculated as “7.5 minutes or less”. Referring to FIG. 3 (1), it can be seen that the number of circulation pumps satisfying “7.5 minutes or less” is five or six. Therefore, the automatic control determination unit 212 determines the number of circulation pumps as “5” as automatic control content.

Returning to FIG. 4, the limit time calculation unit 213 calculates the limit time T <b> 2 that should be dealt with when there is a possibility that the average temperature difference A agreement value is exceeded. Here, the calculation of the limit time T2 can be performed by an arbitrary method, an example of which is shown in FIG.
In FIG. 7, the limit time T2 is calculated by calculating the time from the reference time when the average temperature difference when the six circulation pumps are driven to operate the power generation facility is equal to or less than the agreed value. For example, when the average temperature difference A up to now is “7.2 ° C.” and the current temperature difference B is “7.1 ° C.”, “47.4 minutes” is calculated from the equation 213A in FIG. Then, the limit time T2 is calculated as “47 minutes”. As a result, when 47 minutes have passed since the hour, the operation of the power generation equipment that has driven the six circulation pumps 140 is automatically performed.

  The output control unit 214 performs control to generate the display screen illustrated in FIG. 5 based on various data received from the average calculation unit 211, the automatic control determination unit 212, and the limit time calculation unit 213, and display the display screen on the display unit 25. . Further, when the output control unit 214 receives selection of the automatic control button 251 via the input unit 24, the output control unit 214 performs automatic control of the power generation equipment according to the automatic control content determined by the automatic control determination unit 212. Then, an automatic control signal is transmitted to the device control device 30. Further, the output control unit 214 transmits a limit control signal to the device control device 30 when the limit time T2 calculated by the limit time calculation unit 213 has elapsed.

  Returning to FIG. 2, the device control apparatus 30 controls the operation of the power generation facility in accordance with the control signal received from the monitoring terminal 20. Here, the control signal includes an automatic control signal and a limit control signal transmitted from the output control unit 214 of the monitoring terminal 20, and the automatic control signal includes the contents of automatic control (the amount of load drop and the number of circulation pumps). included. As a result, when the automatic control signal is received, the device control device 30 lowers the output of the power generation facility by 10 MW and circulates seawater in the discharge / discharge system 100 with the number of circulation pumps corresponding to the content of the automatic control. In addition, when the limit control signal is received, the device control device 30 lowers the output of the power generation facility by 10 MW and circulates seawater in the intake / discharge system 100 with six circulation pumps.

[Processing of monitoring system 1]
The configuration of the monitoring system 1 has been described above. Next, processing of the monitoring system 1 will be described with reference to FIG. FIG. 8 is a flowchart showing a processing flow of the monitoring system 1.

  In step S1, the data collection server 10 acquires the seawater temperature of the water intake 110 from the temperature sensor 170 installed in the water intake 110, and the seawater temperature of the water discharge port 120 from the temperature sensor 180 installed in the water discharge port 120. The current temperature difference B of the seawater between the mouth 110 and the outlet 120 is calculated. The temperature difference B calculated in step S1 is transmitted from the data collection server 10 to the monitoring terminal 20 via the local network.

  Subsequently, in step S <b> 2, the processing unit 21 (average calculation unit 211) of the monitoring terminal 20 calculates the average temperature difference A from the reference time to the present based on the temperature difference B acquired from the data collection server 10.

  Subsequently, in step S3, the processing unit 21 (average calculation unit 211) of the monitoring terminal 20 determines whether control is necessary based on the average temperature difference A calculated in step S2. That is, the average calculation unit 211 determines whether or not the average temperature difference A calculated in step S2 may exceed the agreed value. At this time, if there is a possibility that the calculated average temperature difference A exceeds the agreed value, the average calculating unit 211 calculates the average temperature difference Y necessary for satisfying the agreed value, and then the process proceeds to step S4. Move on. On the other hand, when there is no possibility that the calculated average temperature difference A exceeds the agreed value, the processing unit 21 (output control unit 214) of the monitoring terminal 20 appropriately updates the display on the display unit 25 (step S11). Exit.

  Subsequently, in step S4, the processing unit 21 of the monitoring terminal 20 determines whether or not load drop operation is necessary. Here, the temperature difference of the seawater between the water intake port 110 and the water discharge port 120 is reduced only by increasing the number of circulating pumps 140 to be driven even when the load is not lowered. Therefore, the processing unit 21 determines whether or not the circulation pump 140 that can be additionally driven exists, and whether or not it is possible to satisfy the agreed value by additionally driving. This can be handled by additional driving of the circulation pump 140 without reducing the load. Therefore, in the case of YES in step S4, the processing unit 21 (output control unit 214) updates the display of the display unit 25 as appropriate after transmitting an additional drive signal of the circulation pump 140 to the device control device 30. (Step S11), and the process ends. On the other hand, in the case of NO at step S4, the processing unit 21 moves the process to step S5.

  Subsequently, in step S5, the processing unit 21 (automatic control determining unit 212) of the monitoring terminal 20 determines the automatic control content (the number of circulating pumps whose average temperature difference from the normal time to the normal time is equal to or less than the agreed value). To do. As an example, the automatic control determination unit 212 determines automatic control content using the expression 212A in FIG.

  Subsequently, in step S6, the processing unit 21 (limit time calculation unit 213) of the monitoring terminal 20 calculates the limit time T2. In other words, the limit time calculation unit 213 calculates the time that must be dealt with when there is a possibility of exceeding the agreed value (the time that does not satisfy the agreed value unless the six circulation pumps 140 are driven). As an example, the limit time calculation unit 213 calculates the limit time T2 using the equation 213A in FIG.

  Subsequently, the processing unit 21 (output control unit 214) of the monitoring terminal 20 appropriately updates the display on the display unit 25 (step S7). Thereafter, the processing unit 21 (output control unit 214) of the monitoring terminal 20 determines whether or not there is an automatic control instruction via the input unit 24 (step S8). That is, the output control unit 214 determines whether or not the automatic control button 251 on the display screen displayed on the display unit 25 has been operated.

  At this time, when the automatic control button 251 is operated, the processing unit 21 (output control unit 214) of the monitoring terminal 20 sends an automatic control signal corresponding to the automatic control content determined in step S5 to the device control device 30. Transmit (step S10). Thereby, the device control apparatus 30 controls the power generation equipment according to the automatic control content determined in step S4, that is, reduces the power generation load and causes the seawater to circulate in the discharge / discharge system 100 with the determined number of circulation pumps. Control power generation equipment. As a result, the temperature difference of the seawater between the water intake port 110 and the water discharge port 120 decreases, and the power generation facility can be operated so that the average temperature difference from the hour to the hour meets the agreement value.

  On the other hand, when there is no automatic control instruction in step S8, the processing unit 21 (output control unit 214) of the monitoring terminal 20 determines whether or not the limit time T2 calculated in step S6 has elapsed. At this time, if the limit time T2 has not yet elapsed, the output control unit 214 ends the process. On the other hand, when the limit time T2 is reached, the output control unit 214 transmits a limit control signal to the device control apparatus 30 (step S10). Thereby, the apparatus control apparatus 30 controls power generation equipment so that seawater is circulated through the intake / discharge water system 100 with six circulation pumps that lower the power generation load. As a result, the temperature difference of the seawater between the water intake port 110 and the water discharge port 120 decreases, and the power generation facility can be operated so that the average temperature difference from the hour to the hour meets the agreement value.

  The monitoring system 1 according to the present embodiment has been described above. According to the monitoring system 1, the number of circulating pumps in which the average temperature difference from the hour to the hour is equal to or less than the agreed value is determined according to the average temperature difference A until now, and the number of circulating pumps determined Perform circulation. As a result, the flow rate of the seawater circulating through the intake and discharge water system 100 changes according to the average temperature difference A up to the present. For example, when the average temperature difference A greatly exceeds the agreed value, a lot of seawater is circulated. Can be made. Thereby, according to the average temperature difference A, the speed which reduces the temperature difference of the seawater between the water intake 110 and the outlet 120 can be varied, and the average temperature difference from the hour to the hour is the agreed value. The power generation facility can be operated to satisfy the above condition.

  Here, since the seawater taken in from the water intake 110 is circulated through the water intake / discharge system 100 and then discharged from the water discharge port 120, the decreasing rate of the temperature difference changes according to the flow rate of the seawater. That is, the temperature difference decreases faster when the flow rate of seawater is higher than when the flow rate is low. In the monitoring system 1, such a decrease rate of the temperature difference is stored in the storage unit 22, so that only an appropriate number of circulation pumps can be operated according to the remaining time, and an operation satisfying the agreement value can be performed. Can be done efficiently.

In the monitoring system 1, since the operation for reducing the temperature difference is performed according to the input from the manager, the power generation facility is operated so that the average temperature difference from the hour to the hour meets the agreed value. be able to.
On the other hand, in the monitoring system 1, even if there is no input from the administrator, when the time limit is reached, the operation is automatically performed to reduce the temperature difference. it can.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to embodiment mentioned above. The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

The calculation method (FIGS. 6, 7, etc.) in the present embodiment is merely an example, and various calculations may be performed by other methods. For example, a predetermined weight may be given to any side in order to realize more reliable control. That is, in FIG. 6, the safety can be further enhanced by weighting (1.1 times, etc.) the “average temperature difference when automatic control is performed for X minutes”. If so, it is possible to further increase the safety by weighting the “agreement value” (0.9 times, etc.).
Of course, the number of circulation pumps and the limit time may be calculated by a calculation method other than the calculation methods shown in FIGS.

Further, in this specification, the processing (FIG. 8) executed by the monitoring system 1 is performed in parallel or individually even if it is not necessarily performed in time series, as well as processing performed in time series along the order. The process to be executed is also included.
Further, the series of processing can be executed by hardware or can be executed by software. In other words, the functional configuration of FIGS. 1 and 4 is merely an example, and is not particularly limited. That is, it is sufficient that the monitoring system 1 has a function capable of executing the above-described series of processing as a whole, and what kind of functional blocks are used to realize this function is limited to the examples of FIGS. Not. In addition, one functional block may be constituted by hardware alone, software alone, or a combination thereof.

DESCRIPTION OF SYMBOLS 1 Monitoring system 10 Data collection server 20 Monitoring terminal 21 Processing part 211 Average calculation part 212 Automatic control determination part 213 Limit time calculation part 214 Output control part 22 Storage part 23 Communication part 24 Input part 25 Display part 30 Device control apparatus

Claims (4)

A monitoring system for monitoring an average temperature difference within a predetermined time of intake water in a power generation facility that circulates water taken out from an intake port with a circulation pump and discharges water from the discharge port,
In accordance with the average temperature difference up to now, an automatic control determination unit that determines the number of the circulating pumps in which the average temperature difference within the predetermined time is equal to or less than a threshold value;
A device control unit that circulates water between intake and discharge ports by the number of circulation pumps determined by the automatic control determination unit;
A monitoring system comprising: A storage unit that stores the time from the start of load drop of the power generation facility until the temperature difference of the discharged water decreases by a predetermined value for each number of the circulating pumps,
The automatic control determination unit determines the number of the circulation pumps according to the remaining temperature until the predetermined time elapses and the time for each number of the circulation pumps in addition to the average temperature difference up to now. ,
The monitoring system according to claim 1. It has an input unit that accepts input from the administrator,
The device control unit circulates water between intake and discharge ports by the number of circulation pumps on condition that the input from the administrator is received via the input unit.
The monitoring system according to claim 1 or 2. In accordance with the remaining time until the predetermined time elapses and the average temperature difference up to the present time, the water is circulated between the intake and discharge ports using all the circulation pumps in the power generation facility. A time limit calculation unit for calculating a time limit when the average temperature difference of
The equipment control unit circulates water between the intake and discharge ports using all the circulation pumps regardless of the input through the input unit, provided that the limit time is reached.
The monitoring system according to claim 3.

Images