JP5774423B2 - Supervisory control system - Google Patents

Description

  Embodiments described herein relate generally to a monitoring control system.

  In order to realize a highly reliable water distribution system, water supply facilities often have multiple water supply / transmission / distribution pipes to make the system redundant. There are also facilities that are difficult to transfer and distribute. In this case, water that has been purified as much as possible as drinking water may stagnate in the pipe for a long period of time, leading to a decrease in residual chlorine concentration.

  The rate of decrease in residual chlorine concentration depends on the season (especially the water temperature). Therefore, as a countermeasure, the operator's discretion regarding the necessity of implementation of the operation of circulating water in the piping, the target location, and its method It is often entrusted to.

JP-A-6-299576

  An object of the present embodiment is to provide a supervisory control system capable of reducing an operator's load without impairing reliability.

According to this embodiment,
A memory that stores information related to the branching point of a pipe branching point existing in a piping system that supplies and distributes water, the installation position of a control device that is installed in the piping system, and controls the state of the control device. A stagnant water area specifying unit that specifies a stagnant water area in which water is stagnant in the pipe based on information stored in the storage unit, and a notifying part that notifies the stagnant water area specified by the stagnant water area specifying unit And a supervisory control system characterized by comprising:

FIG. 1 is a diagram schematically illustrating a configuration example of a monitoring control system according to the present embodiment. FIG. 2 is a flowchart for explaining an example of stagnant water area specifying processing by the stagnant water area specifying unit shown in FIG. FIG. 3 is a diagram for explaining a method for calculating the amount of stagnant water and the required time for stagnant water treatment of the stagnant water treatment by the calculating unit shown in FIG. FIG. 4 is a flowchart for explaining an example of stagnant water area processing by the switching unit shown in FIG. 1. FIG. 5 is a diagram schematically illustrating another configuration example of the monitoring control system according to the present embodiment.

  Hereinafter, the present embodiment will be described in detail with reference to the drawings. In each figure, the same reference numerals are given to components that exhibit the same or similar functions, and duplicate descriptions are omitted.

  FIG. 1 is a diagram schematically illustrating a configuration example of a monitoring control system according to the present embodiment.

  The monitoring control system of the configuration example shown in the figure is a system for monitoring and controlling a water supply facility (water supply plant) having a piping system made redundant by a normal system pipe and a standby system pipe, and is a piping system installed in the plant. The stagnation water countermeasure control apparatus 10 which performs the stagnation water countermeasure of this is comprised. In addition, stagnant water here is equivalent to the water which has stagnated in piping for a long period in the piping system which sends and distributes water within a plant, and a residual chlorine concentration may fall below a reference value.

  The stagnant water countermeasure control device 10 includes a storage unit 11, a stagnant water area specifying unit 12, a notification unit 13, a calculation unit 14, a switching unit 15, and the like. FIG. 1 shows an example of a piping system model to be monitored by the stagnant water countermeasure control device 10. Hereinafter, a model of the illustrated piping system will be described.

  That is, in this piping system, the piping branch points A to G, the main valve V1, the valves V2 to V5, the direct feed valve V6, the first distribution reservoir 21, and the second distribution reservoir are provided between the water receiving side and the water supply side. 22, the 1st water pump P1, the 2nd water pump P2, the electromagnetic flowmeter 30, etc. are installed.

  The main valve V1 is installed between the water receiving side and the branch point A. The first reservoir 21 is installed between the branch point A and the branch point B. The valve V2 is installed between the first reservoir 21 and the branch point A, and the valve V3 is installed between the first reservoir 21 and the branch point B. The second distribution reservoir 22 is installed between the branch point A and the branch point C. The valve V4 is installed between the second reservoir 22 and the branch point A, and the valve V5 is installed between the second reservoir 22 and the branch point C.

  The first water pump P1 is installed between the branch point B and the branch point D. The second water pump P2 is installed between the branch point C and the branch point E. The branch points B and C and the branch points D and E are connected to each other. Further, between the branch point A and the branch point D, a bypass path that bypasses the first water reservoir 21 and the first water pump P1 is installed. The direct feed valve V6 is installed on a bypass path between the branch point A and the branch point D.

  The electromagnetic flow meter 30 is installed between the branch point E and the branch point G. The electromagnetic flow meter 30 is for measuring the amount of water supplied from the illustrated piping system. In the illustrated example, a bypass path that bypasses the electromagnetic flow meter 30 is also provided.

  In such a piping system, for example, the main valve V1, the valves V2 to V5, the direct feed valve V6, the first water pump P1, and the second water pump P2 correspond to control devices that control water supply and distribution in the pipe system. . In the present embodiment, in particular, the main valve V1, the direct feed valve V6, the first water pump P1 and the second water pump P2 are configured to be able to be electrically switched. That is, these control devices are configured to be able to switch the state from the transmission / distribution stop state to the water / distribution state or from the water / distribution state to the water / distribution stop state based on a control signal from the outside, for example. In many cases, the valves V2 to V5 are configured to manually switch the state, but like the direct feed valve V6 or the like, the state can be electrically switched. Also good.

  The storage unit 11 stores information related to the branch position of the branch point of the pipe existing in the piping system, information related to the installation position of the control device that is installed in the piping system and controls water supply and distribution, and information related to the state of the control device. doing. The information regarding the branch position of the branch point and the information regarding the installation position of the control device are, for example, information input at the stage where the piping system is constructed. The information regarding the state of the control device is, for example, information input from the switching unit 15.

  In the illustrated example, the storage unit 11 includes, as information related to the branch position of the branch point, information related to the branch points A to G, and information related to the installation position of the control device, such as the direct feed valve V6, the first water pump P1, and the second. As information regarding the water pump P2 and the like and information regarding the state of the control device, whether the direct valve V6 is open (water distribution state) or closed (water distribution stop state), the first water pump P1 and the second water pump P2 The information regarding whether each is in an operation state (transmission / distribution state) or a stop state (transmission / distribution stop state) is stored.

  The stagnant water area specifying unit 12 specifies a stagnant water area in which water is stagnating in the pipes constituting the pipe system based on various information stored in the storage unit 11. The stagnant water area specifying process by the stagnant water area specifying unit 12 will be described later. The stagnant water area specifying unit 12 outputs information on the specified stagnant water area to the notification unit 13.

  The notification unit 13 notifies the stagnant water area specified by the stagnant water area specifying unit 12. The notification unit 13 notifies various information by voice or display, and displays information on a display unit (monitor) provided in the stagnant water countermeasure control device 10 or from a voice output unit (speaker). To output information.

  Moreover, this alerting | reporting part 13 may output various information with respect to external apparatuses, such as the monitoring operation terminal operated by the operator which is mentioned later, for example outside the stagnant water countermeasure control apparatus 10. FIG. In this case, information is displayed on a display unit provided in the external device, or information is output by sound from a sound output unit provided in the external device.

  The calculating unit 14 calculates the amount of stagnant water area stagnating in the stagnant water area based on the specifications (inner diameter and pipe length) of the pipe of the stagnant water area specified by the stagnant water area specifying unit 12. The calculation unit 14 outputs the calculated amount of stagnant water area to the notification unit 13. Thereby, the alerting | reporting part 13 alert | reports the stagnation water area water amount calculated by the calculation part 14. FIG.

  Moreover, the calculation part 14 calculates the stagnation water processing required time until completion of the water supply or drainage of the stagnation water stagnated in the stagnation water area based on the water supply / distribution amount per unit time by the control device. The calculation unit 14 outputs the calculated stagnant water treatment required time to the notification unit 13. Thereby, the alerting | reporting part 13 alert | reports the stagnation water treatment required time calculated by the calculation part 14. FIG. In addition, the calculation method of the stagnation water volume and stagnation water treatment required time by this calculation part 14 is mentioned later.

  The switching unit 15 outputs a control signal for switching the state to a water / water distribution stop state or a water / water distribution state for each of the control devices. When such a switching unit 15 performs the stagnant water treatment, the state is changed from the transmission / distribution stop state to the target control device that forms the stagnant water region specified by the stagnant water region specifying unit 12. A control signal for switching to the state is output.

  In addition, when the stagnant water treatment is performed, the switching unit 15 outputs a control signal for switching the state from the transmission / distribution stop state to the transmission / distribution state to the target control device, and then is calculated by the calculation unit 14. The control signal for switching the state from the water supply / distribution state to the water supply / distribution stop state is output based on the fact that the required time for the stagnant water treatment has elapsed. Alternatively, when the stagnation water treatment is performed, the switching unit 15 switches the state from the transmission / distribution stop state to the transmission / distribution state for the target control device for the stagnation water treatment necessary time calculated by the calculation unit 14. May be output.

  Such a switching unit 15 includes information corresponding to each state of the control device, in particular, information corresponding to each state of the direct feed valve V6, the first water pump P1, and the second water pump P2 (the state of the control device is (Including the changed time) is stored in the storage unit 11.

  FIG. 2 is a flowchart for explaining an example of the stagnant water area specifying process by the stagnant water area specifying unit 12 shown in FIG.

  The stagnant water area specifying unit 12 first determines whether or not the control device installed immediately after the branch point n in the piping system is in a water transmission / distribution stop state (ST1). In the piping system of the above model, the stagnant water area specifying unit 12 stores, for example, in the storage unit 11 at the branch point B, whether or not the first water pump P1 installed immediately after that is in the water supply and distribution stop state. Judgment based on the information that has been made.

  Then, the stagnant water area specifying unit 12 refers to an internal clock or the like, and determines that the control device installed immediately after the branch point n is in a transmission / distribution stop state (ST1, YES). Then, it is determined whether or not a predetermined time has elapsed since the target control device is in the water supply / distribution stop state (ST2). In the piping system of the above model, for example, the stagnant water area specifying unit 12 determines whether or not a predetermined time has passed since the first water supply pump P1 installed immediately after the water supply / distribution stop state at the branch point B. Judging.

  The predetermined time here is a stagnation time in which the residual chlorine concentration of water stagnating in the pipe may be lower than a reference value. However, the time required for the residual chlorine concentration to fall below the reference value varies depending on environmental conditions such as the water temperature. For example, the higher the water temperature, the easier the residual chlorine concentration decreases. For this reason, the predetermined time here is appropriately set depending on the season, temperature, and the like.

  Then, the stagnant water area specifying unit 12 determines that a predetermined time has elapsed since the control device installed immediately after the branch point n is in a water transmission / distribution stop state (ST2, YES), and the branch point n It is determined that the route including the installation position of the target control device is a stagnant water area (ST3). In the piping system of the above model, the stagnant water area specifying unit 12, for example, determines that a predetermined time has elapsed since the first water pump P <b> 1 is in the water supply / distribution stop state, and then starts the first water supply from the branch point B. It is determined that the route including the installation position of the pump P1 (in the illustrated example, the route from the branch point B to the branch point D) is a stagnant water area.

  On the other hand, in Step 1, the stagnant water area specifying unit 12 determines that the control device installed immediately after the branch point n is not in a water transmission / distribution stop state (ST1, NO), and at the branch point n. It is determined whether or not the control device installed immediately before is in a transmission / distribution stop state (ST4). In the piping system of the above model, for example, the stagnant water area specifying unit 12 stores in the storage unit 11 whether or not the second water pump P2 installed immediately before the branch point E is in a water supply / distribution stop state. Judgment based on the information that has been made.

  Then, the stagnant water area specifying unit 12 refers to an internal clock or the like, and determines that the control device installed immediately before the branch point n is in a transmission / distribution stop state (ST4, YES). Then, it is determined whether or not a predetermined time has elapsed since the target control device is in the water supply / distribution stop state (ST5). In the piping system of the above model, for example, the stagnant water area specifying unit 12 determines whether or not a predetermined time has elapsed since the second water pump P2 installed immediately before the branch point E is in a water supply / distribution stop state. Judging.

  Then, the stagnant water area specifying unit 12 determines that a predetermined time has passed since the control device installed immediately before the branch point n is in the transmission / distribution stop state (ST5, YES), and the target control device It is determined that the route to the branch point n including the installation position is a stagnant water area (ST6). In the piping system of the above model, for example, the stagnant water area specifying unit 12 installs the second water pump P2 based on determining that a predetermined time has elapsed since the second water pump P2 is in a water distribution stop state. It is determined that the route to the branch point E including the position (in the illustrated example, the route from the branch point C to the branch point E) is a stagnant water area.

  In step ST4, the stagnant water area specifying unit 12 determines that the control device installed immediately before the branch point n is not in a water transmission / distribution stop state (ST4, NO), before and after the branch point n. It is determined that there is no stagnant water area (ST7). Thereby, the stagnant water area identification process for one branch point n is terminated. In the above description, the stagnant water area specifying process taking the branch point B as an example and the stagnant water area specifying process taking the branch point E as an example are mixed in the series of processes. The event that can occur in FIG. 4 is only described in detail, and originally, the processing from step ST1 to step ST7 is individually performed for one branch point n.

  In the above model, the stagnant water area identification process from step ST1 to step ST7 is performed for each of the branch points A to G in the piping system. That is, in this embodiment, stagnant water area identification processing is performed using the above logic based on the state (operating state, operating state, etc.) of all control devices connected to each branch point by piping. .

  When both the first water pump P1 and the second water pump P2 are in the water supply / distribution state (during operation) and the direct feed valve V6 is in the water supply / distribution state (fully open), the branch from the branch point A via the direct feed valve V6 There is a high possibility that the route to point D and the route between branch point B and branch point C will become a “stagnant water area” depending on the operational status and the amount of water delivered and distributed by these control devices. Since there is a possibility that water flows through these routes due to operational changes or changes in the balance of the water flow rate of the control equipment, it is determined that there is no stagnation water.

  According to such a stagnant water area identification process, it is possible to easily and reliably identify a stagnant water area without being left to the operator's judgment, and it is possible to easily plan a method for stagnant water treatment. .

  FIG. 3 is a diagram for explaining a method for calculating the stagnation water volume and the required time for stagnation water treatment by the calculation unit 14 illustrated in FIG. 1.

For example, the calculation unit 14 calculates the stagnant water volume VL [m ³ ] based on the following equation (1). Here, it is assumed that the pipe in the stagnant water area has a circular cross section, the inner diameter is D [mm], and the pipe length of the pipe in the stagnant water area is L [m].

VL = (D / 2) ² × π × L × 10 ⁻⁶ (1)
In the illustrated example, a predetermined time has elapsed after the direct feed valve V6 is in a water supply / distribution stop state (fully closed) by the above-described stagnant water area identification process at the branch point A, and at least “from the branch point A to the direct feed valve V6”. The route is assumed to be a stagnant water area. The stagnant water volume VL is calculated by the above equation (1) based on the specifications of the pipe from the branch point A to the direct feed valve V6, that is, the pipe length L and the inner diameter D thereof.

  In addition, the calculation unit 14 sets the stagnation water area VL based on the calculated stagnation water volume VL and the stagnation water treatment capacity in the method selected as the stagnation water treatment, that is, the amount of water delivered / distributed per unit time by the control device. Calculate the time required for stagnation water treatment until the stagnation of stagnant water is completed.

  In the illustrated example, the stagnant water treatment method is selected to switch the control device that has caused the stagnant water area, that is, the direct feed valve V6 to the water supply / distribution state. The stagnant water treatment capacity of the direct feed valve V6 may depend on, for example, the pressure or flow rate from the water receiving side, but is set to the amount of water delivered / distributed per unit time when the direct feed valve V6 is fully opened. The

For example, if the stagnant water volume VL is calculated to be 1000 m ³ and the stagnant water treatment capacity of the direct delivery valve V6 is calculated to be 500 m ³ per hour, the required time for stagnant water treatment is calculated to be 2 hours. The

  According to such a calculation method, it is possible to calculate the amount of stagnant water area easily and accurately without being left to the operator's judgment, and it is also possible to calculate the time required for stagnant water treatment.

  FIG. 4 is a flowchart for explaining an example of stagnant water area processing by the switching unit 15 shown in FIG. 1.

  First, based on the fact that the stagnant water area has been specified by the stagnant water area specifying unit 12 (ST11, YES), the switching unit 15 selects a method for stagnant water treatment (ST12). That is, the switching unit 15 identifies a target control device that forms a stagnant water area, and selects a method for switching the state of the control device from the water supply / distribution stop state to the water supply / distribution state.

  And the switching part 15 outputs the control signal which switches the state from a transmission / distribution stop state to a transmission / distribution state with respect to the target control apparatus (ST13). In the example illustrated in FIG. 3, the switching unit 15 specifies that the direct delivery valve V6 is the target control device, and outputs a control signal for switching the state from the fully closed state to the fully open state with respect to the direct delivery valve V6. To do. As a result, the direct feed valve V6 is fully opened, and the water stagnated from the branch point A to the direct feed valve V6 flows toward the water feed side, so that the stagnant water treatment is executed.

  Then, the switching unit 15 outputs a control signal for switching the state from the water supply / distribution stop state to the water supply / distribution state to the target control device by referring to the internal clock, and then calculated by the calculation unit 14. It is determined whether or not the required time for stagnation water treatment has elapsed (ST14). Based on the determination that the stagnation water treatment necessary time has elapsed (ST14, YES), the switching unit 15 controls the target control device to switch the state from the water supply / distribution state to the water supply / distribution stop state. Is output (ST15). In the example shown in FIG. 3, the switching unit 15 outputs the control signal for switching to the fully open state with respect to the direct delivery valve V6, and then the stagnant water treatment necessary time (for example, 2 hours) calculated by the calculation unit 14 is obtained. Based on the elapse of time, a control signal for switching to the fully closed state is output to the direct feed valve V6. As a result, the normal operation state is restored from the stagnant water treatment mode.

  FIG. 5 is a diagram schematically illustrating another configuration example of the monitoring control system according to the present embodiment.

  Here, the stagnant water countermeasure control device 10 that monitors one of the piping systems provided in the water supply facility and takes measures against stagnant water in the piping system is connected to the monitoring operation terminal 40 that is an external device via the network. An example is shown. In addition, about the same structure as the structural example shown in FIG. 1, the same referential mark is attached | subjected and detailed description is abbreviate | omitted.

  In the configuration example shown here, the monitoring operation terminal 40 is operated by an operator and includes an input unit for inputting various information, a display unit for displaying various information, and the like, although not described in detail. In such a configuration example, the notification unit 13 of the stagnant water countermeasure control device 10 outputs information to be notified to the monitoring operation terminal 40. For example, the notification unit 13 includes information on the stagnant water area specified by the stagnant water area specifying unit 12, information on the stagnant water amount calculated by the calculation unit 14, information on the necessary time for stagnant water treatment calculated by the calculation unit 14, and the like. Output to the monitoring operation terminal 40.

  In the monitoring operation terminal 40, the information input from the notification unit 13 is displayed on the display unit. Thereby, the information input from the notification unit 13 can be visualized. That is, it is possible to visually confirm information on the stagnant water area, the stagnant water quantity, and the required time for stagnant water treatment on the monitoring operation terminal 40 monitored by the operator during daily operation. Therefore, the operator can monitor the target piping system based on these pieces of information, and can easily plan a stagnant water treatment method in the piping system. For this reason, it is possible to reduce the load on the operator. In addition, it is possible to specify a stagnant water area and perform stagnant water treatment under a unified standard without depending on the experience and intuition of the operator.

  In the example shown in FIG. 5, the switching unit 15 provided in the stagnant water countermeasure control device 10 does not receive a command from the monitoring operation terminal 40 by the operation of the operator, and the stagnant water as shown in FIG. 4. Processing can be performed automatically. For this reason, it is possible to further reduce the load on the operator. In such a case, the notification unit 13 may output the status of the stagnant water treatment performed by the switching unit 15 to the monitoring operation terminal 40. Thereby, in the monitoring operation terminal 40, it becomes possible for an operator to confirm the implementation status of stagnant water treatment visually.

  Such stagnant water treatment may be performed not only automatically by the switching unit 15 but also by a command from the monitoring operation terminal 40 by an operator's operation. In this case, for example, when the information regarding the stagnant water area is input from the notification unit 13 in the monitoring operation terminal 40, the stagnant water area is displayed on the display unit. The operator confirms the stagnant water area displayed on the monitoring operation terminal 40 and operates the input unit of the monitoring operation terminal 40 to output a control signal to the target control device via the network. The control device switches its state based on the control signal output from the monitoring operation terminal 40. Even by such a process, it is possible to perform stagnant water treatment in the specified stagnant water area.

  As described above, according to the present embodiment, it is possible to provide a monitoring control system that can reduce the load on the operator without impairing reliability.

  In addition, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... Stagnant water countermeasure control apparatus 11 ... Memory | storage part 12 ... Stagnant water area specific | specification part 13 ... Notification | reporting part 14 ... Calculation part 15 ... Switching part 40 ... Monitoring operation terminal V6 ... Direct feed valve (control apparatus)
P1 ... 1st water pump (control device) P2 ... 2nd water pump (control device)

Claims (8)

A memory that stores information related to the branching point of a pipe branching point existing in a piping system that supplies and distributes water, the installation position of a control device that is installed in the piping system, and controls the state of the control device. And
A stagnant water area identifying unit that identifies a stagnant water area in which water is stagnating in the pipe based on the information stored in the storage unit;
An informing unit for informing the stagnant water area identified by the stagnant water area identifying unit;
A supervisory control system characterized by comprising:   The stagnant water area identification unit is configured to install the control device from the branch point based on information that a predetermined time has elapsed since the control device installed immediately after the branch point is in a transmission / distribution stop state. The monitoring control system according to claim 1, wherein the route including the is identified as a stagnant water area.   The stagnant water area identification unit includes the branch including the installation position of the control device based on information that a predetermined time has elapsed since the control device installed immediately before the branch point is in a transmission and distribution stop state. The monitoring control system according to claim 1 or 2, wherein the route to the point is specified as a stagnant water area. Furthermore, based on the inner diameter and the pipe length of the pipe of the stagnant water area specified by the stagnant water area specifying section, a calculation unit that calculates the amount of stagnant water area stagnant in the stagnant water area,
The monitoring control system according to any one of claims 1 to 3, wherein the notification unit notifies the amount of stagnant water area calculated by the calculation unit. The calculation unit further calculates the required time for stagnation water treatment until completion of the water supply or drainage of the stagnation water stagnating in the stagnation water area, based on the amount of water delivered / distributed per unit time by the control device,
The monitoring control system according to claim 4, wherein the notification unit notifies the required time for stagnant water treatment calculated by the calculation unit.   In addition, a switching unit that outputs a control signal for switching the state from the water supply / distribution stop state to the water supply / distribution state is provided for the target control device that forms the stagnant water region specified by the stagnant water region specifying unit. The monitoring control system according to any one of claims 1 to 5, wherein: A switching unit that outputs a control signal for switching the state from a water supply / distribution stop state to a water supply / distribution state for the control device that forms the stagnant water region specified by the stagnant water region specifying unit,
The switching unit outputs a control signal for switching the state from the transmission / distribution stop state to the transmission / distribution state with respect to the target control device, and the stagnation water treatment necessary time calculated by the calculation unit has elapsed. The monitoring control system according to claim 5 , wherein a control signal for switching the state from the water supply / distribution state to the water supply / distribution stop state is output based on the above. Furthermore, a monitoring operation terminal operated by an operator is provided,
The monitoring control system according to claim 1, wherein the notification unit outputs information to be notified to the monitoring operation terminal.

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