Water operating plan assisting device and water operating plan assisting method

Abstract

To provide a device that assists a planning of water operation associated with a service water providing business and a terminus water supply business.SOLUTION: A water operation plan assisting device includes: a water operation planning unit which resolves a predetermined water operation planning problem using water distributed amount actual record data at each water receiving point, and determines the scale of a self water facility at each water receiving point when a variable provision of service water that changes the providing amount to each water receiving point depending on the time and a self water standardization that standardizes the self water at each water receiving point are introduced; a water storage leeway calculating unit that calculates a water storage leeway at each water receiving point when a decision is made using water distributed amount actual record data that has a water demand which is applied for the decision and which satisfies a predetermined condition, the water demand being obtained from a water operation planning simulation at each water receiving point using the water distributed amount actual record data and the scale of the self water facility, and, the self water facility; and an introduction sequence draft creating unit that creates the introduction sequence draft for the service water supply that changes depending on the time and for the self water standardization at each water receiving point until reaching the scale of the self water facility from the current state based on the capacity of the water storage leeway at each water supply point.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an apparatus and a method for supporting an introduction plan of water operation in cooperation between a water supply business and a terminal water supply business.

Background Art

[0002] In the domestic water supply business, water supply business operators such as prefectures and wide-area water supply enterprise groups supply tap water to terminal water supply business operators such as municipalities. The terminal water supply business operators add tap water (self-supplied water) produced in their own facilities to the supplied tap water and supply tap water to consumers such as ordinary households. In many regions, a certain amount of water is constantly supplied from the water purification plant of the water supply business operator to the water purification plant and water storage tank of the terminal water supply business operator. However, efforts are underway to change this to time-varying water supply and optimize (downsize) the scale of the water supply facilities of the terminal water supply business operator. For example, in Non-Patent Document 1, a method is disclosed in which, for a water purification plant and water storage tank (hereinafter referred to as a water intake point) of a terminal water supply business operator that receives tap water, by performing time-varying water supply by utilizing the water storage capacity of the water storage tank of the terminal water supply business operator, the amount of self-supplied water at the water intake point is leveled and the scale of the self-supplied water facility is optimized (downsized).

Prior Art Documents

Non-Patent Documents

[0003]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the method described in Non-Patent Document 1 above, it becomes possible to determine the goal state (final form) when introducing time-varying water supply and self-leveling for all water intake points in the water supply area, that is, the state when the self-water is leveled as much as possible by the effect of time-varying water supply and the self-water facility scale (self-water volume upper limit) is minimized, enabling optimization of the facility scale and reduction of facility renewal costs throughout the region.

[0005] However, due to the budget and preparation conditions of the end water supply operator, it is not possible to introduce time-varying water supply and self-leveling simultaneously for all water intake points. Therefore, from the current state (a state where a constant amount of water supply is constantly provided for each water intake point) to the goal state described above, it is necessary to introduce time-varying water supply and self-leveling for each water intake point in an orderly manner. However, the conventional method mentioned above does not mention the introduction order.

[0006] By the way, since the current water purification plant of the water supply operator (hereinafter referred to as the water purification plant) is basically constructed on the premise of supplying a constant amount of water, even when the above-mentioned time-varying water supply is carried out for each water intake point, it is desirable that the water supply volume from the water purification plant, which is the sum of the water intake volumes at each water intake point, remains constant. That is, if the water intake volume of a certain water intake point in a predetermined period is a waveform of a phase sequence corresponding to demand fluctuations (a waveform in which the water intake volume increases or decreases in accordance with the increase or decrease in demand), the water intake volume of another water intake point needs to be a waveform of the opposite phase sequence. At this time, if the water storage capacity of the water intake point is large, the water intake volume can take either a phase sequence or an opposite-phase sequence waveform, but if the water storage capacity is small, only the phase sequence waveform can be taken.

[0007] Therefore, for example, when the above-mentioned time-varying water supply and self-leveling are introduced first for a plurality of water intake points with a small water storage capacity, the waveform of the water intake volume of the above-mentioned water intake points becomes a phase sequence. Therefore, the waveform of the water supply volume from the water purification plant, which is the sum of them, also becomes a phase sequence, that is, it becomes impossible to maintain a constant water supply volume, and there is a possibility that the above-mentioned time-varying water supply and self-leveling cannot be realized.

[0008] Therefore, it becomes an issue to determine an appropriate introduction order of time-varying water supply and self-leveling for each water intake point from the current state to the state of the above goal.

Means for Solving the Problem

[0009] The water operation plan support device according to the present invention is a water operation plan support device that supports the water operation of each water intake point that distributes the received tap water and self-supplied water to consumers, and solves a predetermined water operation plan problem using the actual water distribution data of each water intake point, thereby changing the supply amount according to time for each water intake point. A goal state determination unit that determines the scale of the self-water facility at each water intake point when introducing a variable water supply and self-leveling that levels the amount of self-water at each water intake point; and the water demand used in the determination obtained from the water operation plan simulation of each water intake point using the actual water distribution data and the scale of the self-water facility. A storage capacity calculation unit that calculates the storage capacity at each water intake point when the determination is made using the actual water distribution data and the scale of the self-water facility that satisfy a predetermined condition; and based on the magnitude of the storage capacity at each water intake point, from the current state to the scale of the self-water facility. It is configured as a water operation plan support device characterized by comprising an introduction order creation unit that creates an introduction order plan for the time-varying water supply and the self-leveling for each water intake point up to.

Effects of the Invention

[0010] According to the present invention, it becomes possible to determine an appropriate introduction order of time-varying water supply and self-leveling for each water intake point from the current state to the state of the goal.

Brief Description of the Drawings

[0011]

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Embodiments for Carrying Out the Invention

Examples

[0012] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments described below. The following description and drawings are examples for explaining the present invention, and for the sake of clarity of explanation, appropriate omissions and simplifications have been made. The present invention can also be implemented in various other forms. Unless otherwise specified, each component may be in a single or plural number.

[0013] In the drawings, the positions, sizes, shapes, ranges, etc. of the respective components shown may not represent the actual positions, sizes, shapes, ranges, etc. in order to facilitate understanding of the invention. For this reason, the present invention is not necessarily limited to the positions, sizes, shapes, ranges, etc. disclosed in the drawings.

[0014] In the following description, various types of information may be described using expressions such as "table" and "list", but the various types of information may be represented by data structures other than these. In order to indicate that it does not depend on the data structure, "XX table", "XX list", etc. may be referred to as "XX information". When explaining identification information, when expressions such as "identification information", "identifier", "name", "ID", "number", etc. are used, these can be mutually replaced.

[0015] When there are a plurality of components having the same or similar functions, they may be described by attaching different subscripts to the same reference numeral. However, when it is not necessary to distinguish these plurality of components, the subscripts may be omitted in the description.

[0016] In the following description, there may be cases where the processes performed by executing a program are described. However, the program is executed by a processor (e.g., a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit)), and in order to perform the defined processes while appropriately using a storage resource (e.g., a memory) and / or an interface device (e.g., a communication port), etc., the subject of the process may be the processor. Similarly, the subject of the process performed by executing the program may be a controller, a device, a system, a computer, or a node having a processor. The subject of the process performed by executing the program may be an arithmetic unit and may include a dedicated circuit (e.g., an FPGA (Field-Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit)) that performs a specific process.

[0017] The program may be installed from a program source into a device such as a computer. The program source may be, for example, a program distribution server or a computer-readable storage medium. When the program source is a program distribution server, the program distribution server includes a processor and a storage resource for storing the program to be distributed, and the processor of the program distribution server may distribute the program to be distributed to other computers. Also, in the following description, two or more programs may be realized as one program, or one program may be realized as two or more programs.

[0018] FIG. 1 shows a schematic diagram of the overall configuration of a water operation plan support device 101, a water supply system 102 including a monitoring and control system, a water purification plant, a water storage tank, a water distribution pipe network, a network, etc., according to an embodiment of the present invention.

[0019] The tap water purified at the water purification plant 103 of the water supply company is pumped by a pump (not shown) in the water purification plant to each water distribution tank 111, 121, 131 in the water receiving points 11, 12, 13 of the end water supply company, and a predetermined amount of water is received by a water receiving valve (not shown) at the entrance of each water distribution tank. Also, the tap water (self-supplied water) purified at each self-supplied water facility (self-supplied water purification plant) 112, 122, 132 in the water receiving points 11, 12, 13 is pumped by a pump (not shown) in the self-supplied water facility to each water distribution tank 111, 121, 131, and after being temporarily stored in each water distribution tank together with the above-mentioned tap water, it is distributed by a pump (not shown) in each water distribution tank through the water distribution pipe network to each water distribution area 114, 124, 134. Here, in FIG. 1, only 3 water receiving points 11, 12, 13 are shown, but actually there are N water receiving points, each of which is assumed to include a self-supplied water facility, a water distribution tank, and a monitoring and control system.

[0020] The water purification plant 103 measures the water supply amount of the water supplied to each water distribution tank at a predetermined cycle (for example, a 1-minute cycle) and transmits it to the monitoring and control system (SCADA) 104. Also, each self-supplied water facility 112, 122, 132 in each water receiving point 11, 12, 13 measures the self-supplied water amount supplied to each water distribution tank at a predetermined cycle, and each water distribution tank 111, 121, 131 measures the water receiving amount of the water supplied from the water purification plant 103, the water storage amount in the water distribution tank, and the water distribution amount (demand amount) supplied to each water distribution area at a predetermined cycle and transmits them to each monitoring and control system 113, 123, 133. The monitoring and control system 104 acquires the measured value of the water supply amount of the water purification plant 103 transmitted above, takes the sum or average of it for 1 hour to aggregate the hourly water supply amount per hour unit, and stores each aggregated data. Also, each monitoring and control system 113, 123, 133 acquires the measured values of the self-supplied water amount of each self-supplied water facility 112, 122, 132, the water receiving amount of the water in each water distribution tank 111, 121, 131, the water storage amount in the water distribution tank, and the water distribution amount transmitted above, takes the sum or average of it for 1 hour to aggregate the self-supplied water amount, water receiving amount, water storage amount in the water distribution tank, and water distribution amount of each water receiving point per hour unit, and stores each aggregated data. The water operation plan support device 101 is connected to each monitoring and control system 104, 113, 123, 133 via the network 105.

[0021] The water operation plan support device 101 is a general computer system composed of a CPU 151, a storage device (a memory 152 such as a RAM or a flash memory, a storage 153 such as a hard disk), an input unit 155 which is an input interface (I / F) 154 (a keyboard, a mouse, etc.), and a display unit 157 which is an output I / F 156 (a display, a printer, etc.).

[0022] In the memory 152 of the storage device, a facility information registration unit 161, a measurement data acquisition unit 162, a water demand prediction unit 163, a water operation plan unit 164, a water storage surplus calculation unit 166, an introduction order plan creation unit 167, an introduction order plan scoring unit 168, and an introduction order plan display unit 169 are stored as programs, and the CPU 151 executes these programs.

[0023] Also, in the storage 153 of the storage device, a water purification plant information management table 181, a water intake point information management table 182, a measurement data management table 183, a goal-time optimal state management table 185, a water storage surplus management table 186, an introduction order plan management table 187, a scoring result management table 188, and a demand prediction result management table 189 are stored as data and can be used when executing the above programs.

[0024] The facility information registration unit 161 is a program that registers information about the water purification plant, the self-water facilities at each water intake point, and the water storage tanks input by the administrator in a predetermined table. The measurement data acquisition unit 162 is a program that acquires each measurement data indicating the actual performance of the water supply volume for water use, the water intake volume for water use at each water intake point, the self-water volume, the water distribution volume, and the water storage volume in the water storage tank during a predetermined period transmitted from the monitoring and control systems 104, 113, 123, and 133, and registers it in a predetermined table. The demand prediction unit 163 is a program that predicts the demand (water distribution volume) in each water distribution area for a period in the future (for example, 5 years later, 10 years later, etc.). The water operation planning unit 164 is a program that performs a water operation simulation in the target water supply area, and determines the feasibility of time-varying water supply and calculates the scale of the self-water facilities when introducing time-varying water supply and self-water level standardization for each water intake point. Time-varying water supply means a water supply in which the supply volume is changed according to time from the water purification plant of the water supply operator to the water purification plant and water storage tank of the end water supply operator. Also, self-water level standardization means leveling the self-water volume at each water intake point in order to optimize (downsize) the scale of the self-water facilities at each water intake point.

[0025] The water storage capacity calculation unit 166 is a program that performs a water operation simulation (water storage volume simulation) at each water intake point and calculates the water storage capacity of the water storage tank at each water intake point. The introduction order plan creation unit 167 is a program that creates an appropriate introduction order of time-varying water supply and self-water level standardization for each water intake point from the current state to the state of the above goal. The introduction order plan scoring unit 168 is a program that scores the created introduction order plan based on a predetermined index. The introduction order plan display unit 169 is a program that displays the created introduction order plan.

[0026] The water supply purification plant information management table 181 is a table for managing information related to the water supply purification plant. The intake point information management table 182 is a table for managing information related to the self-water facilities and water distribution tanks at each intake point. The measurement data management table 183 is a table for managing each measurement data indicating the actual performance of the water supply volume, the water intake volume at each intake point, the self-water volume, the water distribution volume, the water storage volume in the water distribution tank, etc. during a predetermined period obtained from the monitoring and control systems 104, 113, 123, and 133. The goal-time optimal state management table 185 is a table for managing information regarding the optimal state at the goal time (the state where the scale of each self-water facility is minimized) when introducing time-varying water supply and self-water level normalization for each intake point. The water storage capacity management table 186 is a table for managing the water storage capacity in the water distribution tank at each intake point. The introduction order plan management table 187 is a table for managing information regarding an appropriate introduction order plan of time-varying water supply and self-water level normalization for each intake point from the current state to the state of the above goal. The scoring result management table 188 is a table for managing the scoring results for the introduction order plan based on predetermined indicators. The demand prediction result management table 189 is a table for managing the prediction results of the demand volume (water distribution volume) in each water distribution area at a predetermined period in the future (for example, 5 years later, 10 years later, etc.). The optimal state management table by introduction time 190 is a table for managing information regarding the optimal state for each introduction time (the state where the scale of each self-water facility is minimized) when introducing time-varying water supply and self-water level normalization for each intake point. The water storage capacity management table by introduction time 191 is a table for managing the water storage capacity in the water distribution tank at each intake point for each introduction time when introducing time-varying water supply and self-water level normalization for each intake point.

[0027] In an embodiment of the present invention, in the water operation plan support device 101, when it is assumed that the water demand in the water supply area does not change significantly from the current situation at the time of reaching the goal (the time when the introduction of time-varying water supply and self-leveling is completed for all water intake points), the state of the goal when time-varying water supply and self-leveling are introduced for all water intake points, that is, the state when the self-water is leveled as much as possible by the effect of the time-varying water supply and the self-water facility scale (the upper limit of the self-water volume) is minimized, is determined. Also, an appropriate introduction order of time-varying water supply and self-leveling for each water intake point from the current state (the state where time-varying water supply and self-leveling are not introduced for each water intake point) to the state of the goal is created.

[0028] Here, a concept for appropriately introducing time-varying water supply and self-leveling for each water receiving point will be described. An example of the water supply volume from the water purification plant to the water receiving points, the self-water volume, the water receiving volume, the water storage volume, and the water distribution volume at each water receiving point in the goal state when time-varying water supply and self-leveling are introduced for each water receiving point is shown in FIG. 2. In the time-varying water supply, even if the water receiving volume at each water receiving point varies with time, it is desirable that the total water supply volume from the water purification plant, which is the sum thereof, be as constant as possible. If the water receiving volume at a certain water receiving point has a waveform of the same phase corresponding to the demand fluctuation, the water receiving volume at another water receiving point needs to have a waveform of the opposite phase (in the example of FIG. 2, the waveforms of the water receiving volumes at the upper two water receiving points are of the same phase, and the lower two water receiving points are of the opposite phase). At this time, if the water storage margin at the water receiving point is large, the water receiving volume can take either a waveform of the same phase or the opposite phase, but if the water storage margin is small, only a waveform of the same phase can be taken. Therefore, if the state when time-varying water supply and self-leveling are introduced for each water receiving point can be realized, there must be a water receiving point with a large water storage margin such that the waveform of the water receiving volume can be of the opposite phase. Therefore, by introducing time-varying water supply and self-leveling in order from such a water receiving point with a large water storage margin, the state of time-varying water supply and self-leveling for the introduced water receiving points can be realized at any intermediate stage from the current state to the goal state.

[0029] In the water operation plan support device 101, by executing the following processes (1) to (7), it is possible to create an appropriate introduction order of time-varying water supply and self-leveling for each water receiving point from the current state to the above-mentioned goal state based on the above-mentioned concept. (1) Registration of facility information (2) Acquisition of measurement data (3) Determination of the goal state (4) Calculation of the water storage margin for each water receiving point (5) Creation of a proposed introduction order of time-varying water supply and self-leveling (6) Scoring of the proposed introduction order based on a predetermined index (7) Display of the proposed introduction order

[0030] Next, the implementation methods of processes (1) to (7) will be described with reference to FIGS. 3 to 13. First, the registration process (1) of facility information will be described. The administrator of the water operation plan support device 101 inputs, in advance, from the input unit 155, as information regarding the water purification plant, the name of the water purification plant 103, the upper and lower limit values of the water supply volume, and the name of the water receiving point of the water supply destination. Also, as information regarding the water receiving point, the names of the respective water receiving points 11, 12, 13, the distance on the pipeline from the upstream (water purification plant) of each water receiving point, the upper and lower limit values of the water receiving volume of each water distribution tank 111, 121, 131, the upper and lower limit values of the water storage volume, and the upper limit value of the self-water volume (the upper limit value before self-water level normalization) of the self-water facilities 112, 122, 132 are input. The facility information registration unit 161 of the water operation plan support device 101 registers the above input information in the water purification plant information management table 181 and the water receiving point information management table 182 for each entry of the above input water purification plant and each water receiving point. FIGS. 3 and 4 respectively show examples of the water purification plant information management table 181 and the water receiving point information management table 182 registered by the facility information registration unit. In FIG. 3, for example, the water purification plant 103 is registered as a water purification plant with the lower limit value and the upper limit value of the water supply volume being "20000" and "30000" respectively, and with "Water receiving point 11", "Water receiving point 12", and "Water receiving point 13" as the water receiving points of the supply destination. Also, in FIG. 4, for example, the water receiving point 11 is registered as a water receiving point with the distance from the upstream water purification plant being "50", the lower limit value and the upper limit value of the water intake volume being "800" and "1200" respectively, the lower limit value and the upper limit value of the water storage volume being "5000" and "8000" respectively, and the upper limit value of the self-water volume being "250".

[0031] As described above, the facility information registration unit 161 performs the registration process of the facility information.

[0032] Next, the measurement data acquisition process (2) will be described. The monitoring and control systems 104, 113, 123, and 133 aggregate the hourly water supply volume of the water purification plant in the target water supply area, the water intake volume at each water intake point, the self-water volume, the water distribution volume, and the water storage volume in the water storage tank every hour. Each time they do so, they transmit the measurement time and measurement value data to the water operation plan support device 101 via the network 105. The measurement data acquisition unit 162 of the water operation plan support device 101 sequentially acquires each of the transmitted measurement value data and its measurement time, and registers them in the measurement data management table 183. An example of the measurement data management table 183 registered by the measurement data acquisition unit 162 is shown in FIG. 5. In FIG. 5, for example, regarding the water intake point 11, at the time of "12:00" on "January 1, 2023 (Saturday)", the water intake volume is measured as "1000", the self-water volume is "250", the water distribution volume is "900", and the water storage volume in the water storage tank is "6000".

[0033] As described above, the measurement data registration process is performed by the measurement data acquisition unit 162.

[0034] Next, the goal state determination process (3) will be described. This process (3) is executed as a preprocess when creating the introduction order of time-varying water supply and self-leveling for each water intake point. The water operation plan unit 164 of the water operation plan support device 101 assumes that the water demand in the water supply area will not change significantly from the current situation at the time of the goal (the time when the introduction of time-varying water supply and self-leveling is completed for all water intake points). Based on the water operation plan simulation, it determines the goal state when time-varying water supply and self-leveling are introduced for all water intake points in the water supply area, that is, the state when the self-water is leveled as much as possible due to the effect of time-varying water supply and the self-water facility scale (self-water volume upper limit) is minimized.

[0035] In the water operation planning department 164, for each water intake point, in order to conduct a water operation planning simulation that minimizes the scale of the self-water facility (the upper limit of the self-water volume) of each water intake point when the above-mentioned time-varying water supply and self-leveling are introduced, the following formulation of a water operation planning problem (a mathematical optimization problem consisting of constraints and an objective function) is carried out.

[0036] The water operation planning problem in the water supply area shown in Fig. 1 is formulated as follows using the variables shown in Fig. 6. Here, let the time t = 1, …, 24 (in 1-hour units, for 24 hours), and the flow rate (water intake volume, self-water volume, water distribution volume) be the total value from time t - 1 to time t, and the water storage volume be the value at time t. 〇Variables ·X1(t): The water supply volume from the water purification plant 103 for water use at time t ·R1(t): The water intake volume for water use at the water intake point 11 (water storage tank 111) at time t ·R2(t): The water intake volume for water use at the water intake point 12 (water storage tank 121) at time t ·R3(t): The water intake volume for water use at the water intake point 13 (water storage tank 131) at time t ·S1(t): The self-water volume of the self-water facility 112 at the water intake point 11 at time t ·S2(t): The self-water volume of the self-water facility 122 at the water intake point 12 at time t ·S3(t): The self-water volume of the self-water facility 132 at the water intake point 13 at time t ·V1(t): The water storage volume of the water storage tank 111 at the water intake point 11 at time t ·V2(t): The water storage volume of the water storage tank 121 at the water intake point 12 at time t ·V3(t): The water storage volume of the water storage tank 131 at the water intake point 13 at time t ·Y1(t): The water distribution volume (known) of the water storage tank 111 at the water intake point 11 at time t ·Y2(t): The water distribution volume (known) of the water storage tank 121 at the water intake point 12 at time t ·Y3(t): The water distribution volume (known) of the water storage tank 131 at the water intake point 13 at time t

[0037] The above water distribution amounts Y1(t), Y2(t), and Y3(t) shall use the actual water distribution data on the day when the water demand (total of each water distribution amount) in the water supply area is the largest in the past specified period registered in the measurement data management table 183. That is, even under environmental conditions where the water demand is large and the peak value of the water storage amount in the water distribution tank is likely to be high, the water operation planning department 164 determines the upper limit of its own water volume (scale of its own water facilities) as the goal state when it is considered that it will not increase any further by performing appropriate time-varying water supply.

[0038] Using the above variables, the water operation planning problem (constraint conditions, objective function) can be formulated as follows. 〇Constraint condition (constant water supply and delivery volume) ·X1(1)=X1(2)= … =X1(24) 〇Constraint condition (water balance equation) ·X1(t)=R1(t)+R2(t)+R3(t) ·Vi(t)=Vi(t - 1)+Ri(t)+Si(t)-Yi(t) (i = 1, 2, 3) 〇Constraint condition (upper and lower limit constraints) ·X1_MIN ≦ X1(t) ≦ X1_MAX (i = 1, 2, 3) ·Ri_MIN ≦ Ri(t) ≦ Ri_MAX (i = 1, 2, 3) ·Vi_MIN ≦ Vi(t) ≦ Vi_MAX (i = 1, 2, 3) ·Si(t) ≦ Si_MAX (i = 1, 2, 3) Here, X1_MIN and X1_MAX are the upper and lower limit values of the water supply volume X1(t) for water use, Ri_MIN and Ri_MAX are the upper and lower limit values of the water receiving volume Ri(t) for water use, Vi_MIN and Vi_MAX are the upper and lower limit values of the water storage volume Vi(t) in the water distribution tank, and Si_MAX is the upper limit value of the self-water volume Si(t). The upper and lower limit values registered in the water purification plant information management table 181 and the water receiving point information management table 182 shall be used. Also, when a constant amount of water is received for water use at all times, the constraint condition of R1(1) = R1(2) = … = R1(24) will be added to the water receiving volume Ri(t) for water use. However, since time-varying water receiving for water use is carried out at each water receiving point here, the above constraint condition is not added.

[0039] 〇Objective function

[0040]

Number

[0041] The two objective terms that make up the above objective function J1 are those commonly used in the water operation planning problem. The first term is the term for leveling the water receiving volume for water use, and the second term is the term for minimizing the maximum value (peak value) of the self-water volume.

[0042] The above-formulated water operation planning problem includes the max symbol (maximum value), absolute value symbol, piecewise function, etc., but it can be converted into an equivalent linear programming problem or mixed integer programming problem and can be solved using numerical analysis software such as MATLAB (registered trademark) and GUROBI.

[0043] The water operation planning department 164 formulates a water operation plan such that the maximum self-water volume of each water receiving point is minimized when the above-described time-varying water supply and self-leveling are introduced for each water receiving point by performing a solution simulation (water operation planning simulation) of the formulated water operation planning problem. Then, the maximum self-water volume obtained for each water receiving point is registered in the goal-time optimal state management table 185 as the self-water facility scale (upper limit) in the goal state. That is, when the self-water volume Si(t) of the self-water facility reaches its maximum, the water intake volume Ri(t) can be minimized. Therefore, the water operation planning department 164 registers the scale of the self-water facility at which the maximum value of the self-water volume Si(t) is minimized as the goal state. Fig. 7 shows an example of the goal-time optimal state management table 185 registered by the water operation planning department 164. In Fig. 7, for example, using the above-described objective function J1, the self-water facility scale "200" at water receiving point 11 is registered as the new upper limit.

[0044] As described above, the water operation planning department 164 performs the determination process for the goal state.

[0045] Next, the calculation process (4) of the water storage surplus capacity for each water receiving point will be described. This process (4) is executed as a preprocess when creating the introduction order of the time-varying water supply and self-leveling for each water receiving point. Based on the water operation planning simulation for each water receiving point, the water storage surplus capacity calculation unit 166 of the water operation planning support device 101 uses the demand volume actual data (water distribution volume data, Fig. 5) on the day when the water demand used for determining the goal state is the maximum, and the self-water facility scale (self-water volume upper limit, Fig. 7) at the goal time. Assuming that the water intake volume at each water receiving point is fixed (does not vary with time), a water operation plan for each water receiving point is formulated such that the variation in the water storage tank capacity is minimized. The variation in the water storage volume is excluded from the water storage tank capacity (upper limit - lower limit) to calculate the water storage surplus capacity of each water receiving point in the above-described goal state. Here, in the goal state, since the water storage surplus capacity may be overestimated or underestimated compared to the actual situation due to the time variation of the water intake volume (for example, when the water intake volume varies with time such that it equals the water distribution volume - self-water volume, the water storage volume does not change and the water storage surplus capacity becomes excessive), it is assumed that the water intake volume at each water receiving point is fixed.

[0046] The water storage margin calculation unit 166 formulates the following water operation plan problems for each water intake point in order to perform a water operation plan simulation for each water intake point that minimizes the fluctuations in the water storage volume of the above-mentioned water distribution tank. As an example, the formulation of the water operation plan problem at the water intake point 11 is shown using the variables shown in FIG. 6.

[0047] 〇 Variables · R1(t): Water intake volume (constant value) of the water intake point 11 (water distribution tank 111) at time t · S1(t): Self-supplied water volume of the water intake point 11 (self-water facility 112) at time t · V1(t): Water storage volume of the water intake point 11 (water distribution tank 111) at time t · Y1(t): Water distribution volume (known) of the water intake point 11 (water distribution tank 111) at time t The above water distribution volume Y1(t) shall use the water distribution volume actual data of the day when the water demand (total of each water distribution volume) in the water supply area is maximized in the past predetermined period registered in the measurement data management table 183. Using the above variables, the water operation plan problem (constraint conditions, objective function) can be formulated as follows. 〇 Constraint conditions (constant water intake volume) · R1(1) = R1(2) = … = R1(24) 〇 Constraint conditions (water balance equation) · V1(t) = V1(t - 1) + R1(t) + S1(t) - Y1(t) 〇 Constraint conditions (upper and lower limit constraints) · V1_MIN ≦ V1(t) ≦ V1_MAX · S1(t) ≦ S1_MAX Here, V1_MIN and V1_MAX are the upper and lower limit values of the water storage volume V1(t) of the water distribution tank, and S1_MAX is the upper limit value of the self-supplied water volume S1(t). The respective upper and lower limit values registered in the water intake point information management table 182 shall be used.

[0048] 〇 Objective function

[0049]

Equation

[0050] The objective function J2 is a term for minimizing the maximum value (peak value) of the water storage volume, thereby enabling the formulation of a water operation plan that minimizes fluctuations in the water storage volume.

[0051] The water storage capacity calculation unit 166 formulates a water operation plan for each water intake point such that fluctuations in the water storage volume of the water distribution tank are minimized by solving the above-formulated water operation plan problem. Then, the water storage capacity (upper limit - lower limit) of the water distribution tank is used to exclude the above-mentioned fluctuations in the water storage volume to calculate the water storage capacity, which is registered in the water storage capacity management table 186. Fig. 8 shows an example of the water storage capacity management table 186 registered by the water storage capacity calculation unit 166. In Fig. 8, for example, using the above-mentioned objective function J2, the water storage capacity "2000" at the water intake point 11 is registered as the new water storage capacity.

[0052] As described above, the water storage capacity calculation unit 166 calculates the water storage capacity for each water intake point.

[0053] Next, the creation process (5) of the introduction order plan for time-varying water supply and self-leveling will be described. This process (5) is basically executed at the planning stage of the introduction of time-varying water supply and self-leveling. The introduction order plan creation unit 167 of the water operation plan support device 101 newly creates an introduction order plan based on the water storage capacity of each water intake point, or evaluates the feasibility of a predetermined introduction order plan and modifies the introduction order plan as necessary. Here, the introduction order plan is feasible means that by introducing time-varying water supply and self-leveling for each water intake point according to the introduction order plan, the state of time-varying water supply and self-leveling for the introduced water intake point is feasible at any intermediate stage from the current state to the goal state.

[0054] When creating a new introduction order plan, the introduction order plan creation unit 167 refers to the water storage capacity management table 186 and creates an introduction order plan to introduce time-varying water supply and self-leveling in the order of receiving points with high water storage capacity. Since the state when time-varying water supply and self-leveling are introduced for all receiving points is achievable, by introducing time-varying water supply and self-leveling in order from the receiving point with a large water storage capacity, the state of time-varying water supply and self-leveling for a predetermined receiving point can be achieved at any intermediate stage from the current state to the goal state.

[0055] In addition, the introduction order plan creation unit 167 evaluates the feasibility of the introduction order plan input from the input unit 155 by the administrator of the water operation plan support device 101, and modifies the introduction order plan as necessary to make it feasible. Fig. 9 shows a flowchart of the process of evaluating the feasibility of the introduction order plan and modifying the introduction order plan as necessary to make it feasible. Here, it is assumed that the introduction order plan assigns an order of introduction, such as order 1, order 2,..., order N, to N receiving points. Steps S901~ perform feasibility evaluation and modification regarding orders 1 and 2, and steps S905~ perform feasibility evaluation and modification regarding orders 3 and subsequent orders.

[0056] In step S901, the water operation planning department 164 conducts a water operation plan simulation when introducing time-varying water supply and self-leveling (upper limit at the goal) for the water intake points in order 1 and 2, and evaluates its feasibility. That is, for the water operation plan problem formulated in the determination process (3) of the goal state, time-varying water supply and self-leveling (upper limit at the goal) are introduced for the water intake points in order 1 and 2, and for the other water intake points from order 3 onwards, a constant water supply and no self-leveling (applying the current upper limit instead of the upper limit at the goal) are used to formulate the water operation plan problem. Then, the water operation plan simulation is carried out, and an evaluation is made as to whether a water operation plan that satisfies all the constraint conditions can be obtained (if a plan proposal is obtained, it is considered feasible and an introduction order proposal is created). As explained so far, in the time-varying water supply, it is desirable that the total water supply volume from the water purification plant, which is the sum of the water intake volumes at each water intake point, remains as constant as possible even if the water intake volume at each water intake point varies with time. Therefore, in step S901, first, it is determined whether the water intake points in order 1 and 2 are water intake points with a large water storage capacity such that their water intake volumes have waveforms with a phase difference corresponding to the demand variation and waveforms with the opposite phase to each other.

[0057] In step S902, if it is feasible, the process proceeds to step S904; if it is infeasible, the process proceeds to step S903.

[0058] In step S903, the introduction order proposal creation unit 167 revises the order proposal by moving down one or both of the water intake points in order 1 and 2 to order 3 and 4, and moving up the water intake points that can be as early as possible in order 3 and later and have a greater capacity than the capacities of the water intake points in order 1 and 2 to order 1 and 2. However, combinations of the water intake points in order 1 and 2 that have already been evaluated in the simulation are excluded.

[0059] In step S904, set k = 2.

[0060] In step S905, the introduction order from order 1 to k is determined. The water operation planning department 164 performs a water operation planning simulation when introducing time-varying water supply and self-leveling (upper limit at the goal) for the water intake points in order 1 to k + 1, and evaluates its feasibility. That is, for the water operation planning problem formulated in the determination process (3) of the goal state, time-varying water supply and self-leveling (upper limit at the goal) are introduced for the water intake points in order 1 to k + 1, and for the other water intake points, a constant water supply and no self-leveling (applying the current upper limit instead of the upper limit at the goal) are used to formulate the water operation planning problem, perform the water operation planning simulation, and evaluate whether a water operation plan that satisfies all the constraint conditions can be obtained (if a plan is obtained, it is considered feasible and an introduction order plan is created).

[0061] In step S906, if it is feasible, proceed to step S908; if it is infeasible, proceed to step S907.

[0062] In step S907, the introduction order plan creation unit 167 modifies the order plan by shifting the water intake point in order k + 1 to order k + 2, and shifting the water intake point that can be as early as possible among those after order k + 2 and whose remaining capacity is greater than the remaining capacity of the water intake point in order k + 1 to order k + 1. However, exclude the combinations of the water intake points in order 1 to k + 1 that have been evaluated by simulation.

[0063] In step S908, set k to k + 1.

[0064] In step S909, if k < N - 1, proceed to step S905; if k = N - 1, end the process.

[0065] As described above, the feasibility of the introduction order plan input by the administrator is evaluated. If it is infeasible, the above-introduced order is modified to make it feasible. At this time, based on the water storage capacity of each water intake point, the introduction order plan is modified to be as close as possible to the original introduction order plan. An example of the process of evaluating and modifying the feasibility of the introduction order plan according to the flowchart shown in FIG. 9 is shown in FIG. 10. In FIG. 10, the water storage capacity and the introduction order plan of each water intake point ABCDE input by the administrator are shown as "Water intake point D" (order 1, water storage capacity "400"), "Water intake point C" (order 2, water storage capacity "300"), "Water intake point B" (order 3, water storage capacity "200"), "Water intake point E" (order 4, water storage capacity "100"), and "Water intake point F" (order 5, water storage capacity "500"). Then, by performing the above-described processing to conduct simulation evaluation and order swapping, it is shown that the final water storage capacity and the introduction order plan of each water intake point ABCDE are modified to be "Water intake point D" (order 1, water storage capacity "400"), "Water intake point C" (order 2, water storage capacity "300"), "Water intake point E" (order 3, water storage capacity "500"), "Water intake point B" (order 4, water storage capacity "200"), and "Water intake point A" (order 5, water storage capacity "100").

[0066] The introduction order plan creation unit 167 registers the created introduction order plan and the self-water facility scale (self-water upper limit at the goal time) of each water intake point at the time of introduction in the introduction order plan management table 187. FIG. 11 shows an example of the introduction order plan management table 187 registered by the introduction order plan creation unit 167. In FIG. 11, for example, "Water intake point 13" with a self-water facility scale of "300" at the time of introduction is registered as order 1, "Water intake point 11" with a self-water facility scale of "200" at the time of introduction is registered as order 2, and "Water intake point 12" with a self-water facility scale of "250" at the time of introduction is registered as order 3.

[0067] As described above, the introduction order plan creation unit 167 and the water operation plan unit 164 perform the creation process of the introduction order plan for time-varying water supply and self-water level standardization.

[0068] Next, the scoring process (6) for the introduction order plan based on a predetermined index will be described. This process (6) is executed after the introduction order plan is created by process (5). The introduction order plan scoring unit 168 of the water operation plan support device 101 scores the created introduction order plan based on a predetermined index.

[0069] Here, regarding the introduction order, regardless of its feasibility, there is a desirable introduction order. For example, if self-leveling (downsizing) is introduced to a water intake point, it becomes possible to reduce the renewal cost of the self-water facilities that may occur periodically in the future due to the excess facility scale. Therefore, in order to minimize the total long-term renewal cost of the self-water facilities in the entire water supply area, it is desirable to introduce time-varying water supply and self-leveling from the water intake points with large self-water facility scales. Also, for example, when introducing time-varying water supply to an upstream water intake point, the water supply pressure at the downstream water intake point may decrease due to an increase in the water intake volume at the upstream water intake point, and it may become impossible to receive sufficient water. Therefore, in order to reduce the impact of introducing time-varying water supply to other water intake points, it is desirable to introduce time-varying water supply and self-leveling from the downstream water intake points.

[0070] Therefore, the introduction order plan scoring unit 168 scores the created introduction order plan based on a predetermined index based on each index such as minimizing the total renewal cost of the self-water facilities and minimizing the impact of introducing time-varying water supply to other water intake points. The higher the score, the more desirable the introduction order plan is from the perspectives of each of the above indexes 1 and 2, and it can be used to judge the quality of the created introduction order plan.

[0071] Therefore, the introduction order plan scoring unit 168 uses the minimization of the total renewal cost of its own water facilities as Index 1, refers to the water receiving point information management table 182, and introduces time-varying water supply and self-leveling in the order of water receiving points with large upper limits of its own water volume (upper limit before leveling), and creates an introduction order plan A1 based on Index 1. Also, taking the reduction of the impact on other water receiving points due to the introduction as Index 2, referring to the water receiving point information management table 182, and introducing time-varying water supply and self-leveling in the order of water receiving points with a long distance from the upstream (water purification plant), and creates an introduction order plan A2 based on Index 2. At this time, the feasibility of the introduction order plan created based on each index is not questioned.

[0072] Then, the introduction order plan scoring unit 168 calculates the similarity between the introduction order plan B created in process (5) and the introduction order plans A1 and A2 based on the above respective indexes, and uses the calculated similarity to score (grade) the introduction order plan B based on the above respective indexes. The higher the score, the more desirable the introduction order plan is from the viewpoints of Indexes 1 and 2, and it can be used to judge the quality of the introduction order plan.

[0073] The similarity between the order plan A1 based on the index and the created order plan B is calculated using the correlation coefficient between the numerical data representing the order of each water receiving point in each order plan. For example, when the introduction order of the N water receiving points 11, 12, 13,..., 1N in the order plan A1 is in the order of 11, 12, 13,..., 1N, that is, the numerical data representing the order is [1, 2,..., N], and the introduction order of the N water receiving points 11, 12, 13,..., 1N in the order plan B is also in the order of 11, 12, 13,..., 1N, that is, the numerical data representing the order is [1, 2,..., N], the correlation coefficient of the two numerical data is 1. Therefore, normalizing the range of possible values of the correlation coefficient from -1 to 1 to values from 0 to 100, the scoring result of the order plan B is 100 points.

[0074] For example, with respect to the above-described order plan A1, when the introduction order of the N water intake points 11, 12, 13, …, 1N in order plan B is the exact reverse order of 1N, …, R3, R2, R1, that is, when the numerical data representing the order is [N, N - 1, …, 2, 1], the correlation coefficient is -1. Therefore, normalizing the range of possible values of the correlation coefficient from -1 to 1 to values from 0 to 100, the scoring result is set to 0 points.

[0075] The introduction order plan scoring unit 168 registers the scoring result based on the indexes 1 and 2 for the introduction order plan created in process (5) in the scoring result management table 188. Fig. 12 shows an example of the scoring result management table 188 registered by the introduction order plan scoring unit 168. In Fig. 12, for example, for the introduction order plan A1, it shows that the result of scoring based on "minimizing the total renewal cost of the self-water facility" (index 1) is "80 points", and the result of scoring based on "reducing the impact on other water intake points" (index 2) is "40 points".

[0076] As described above, the introduction order plan scoring unit 168 performs the scoring process of the introduction order plan based on the predetermined indexes.

[0077] Next, the display process (7) of the introduction order plan will be described. This process (7) is executed after the scoring based on the predetermined indexes for the introduction order plan is performed in process (6). The introduction order plan display unit 169 of the water operation plan support device 101 acquires the introduction order plan of the time-varying water supply and self-water level standardization for each water intake point and the self-water facility scale at the time of introduction from the introduction order plan management table 187, and also acquires the scoring results of the above introduction order plan based on the predetermined indexes from the scoring result management table 188, creates a display screen of the introduction order plan with the above data displayed, and displays it on the display unit 157. Fig. 13 shows an example of the display screen of the above introduction order plan, self-water facility water intake scale, scoring results, etc. displayed by the introduction order plan display unit 169. In Fig. 13, for example, it shows that each data in the introduction order plan management table 187 shown in Fig. 11 and each data in the scoring result management table 188 shown in Fig. 12 are displayed on one display screen.

[0078] The administrator of the water operation plan support device 101 can determine the appropriate introduction order of the time-varying water supply and self-water level normalization for each water intake point from the current state to the goal state, as well as the scale of the self-water facility (self-water volume upper limit) at the time of introduction, by checking the above-introduced order plan, self-water facility scale, scoring results, etc. displayed on the display unit 157.

[0079] As described above, the introduction order plan display unit 169 performs the display process of the introduction order plan.

[0080] As described above, in this embodiment, as described with reference to FIG. 9 and the like, in the water operation plan support device 101 that supports the water operation of each water intake point that distributes the received tap water and self-water to the consumers, by solving a predetermined water operation plan problem using the actual water distribution data of each water intake point, a variable water supply that changes the supply amount according to time for each water intake point, and a self-water level normalization that equalizes the self-water volume at each water intake point, a goal state determination unit (water operation plan unit 164) that determines the scale of the self-water facility at each water intake point when introduced, and the actual water distribution data and the scale of the self-water facility used in the water operation plan simulation of each water intake point, the actual water distribution data and the scale of the self-water facility that satisfy a predetermined condition (for example, the maximum value) of the water demand used in the above determination are used to calculate the storage capacity margin (storage capacity margin calculation unit 166) of each water intake point when the above determination is made, and based on the magnitude of the storage capacity margin of each water intake point, an introduction order creation unit (introduction order plan creation unit 167) that creates an introduction order plan for the time-varying water supply and the self-water level normalization for each water intake point from the current state to the scale of the self-water facility. Therefore, it is possible to determine an appropriate introduction order for the time-varying water supply and the self-water level normalization for each water intake point from the current state to the goal state, and obtain an introduction order that enables the variable water supply and the self-water level normalization to always be realized.

[0081] Also, as described in steps S903, S907, etc. of FIG. 9, the above-introduction order creation unit evaluates the feasibility of the created introduction order plan based on the above water operation plan simulation for the created introduction order plan, and modifies the plan so that the introduction order plan can be realized. Therefore, the plan can be modified in a form as close as possible to the original introduction order plan.

[0082] As described above, according to the embodiment of the present invention, since a realizable introduction order plan for time-varying water supply and self-leveling for each water intake point from the current state (a state where time-varying water supply and self-leveling are not introduced for each water intake point) to the above goal state is displayed, it becomes possible to determine the introduction order plan with confidence without worrying about the feasibility at the time of introduction. In addition, since the introduction order plan is scored based on a predetermined index, it becomes possible to determine an introduction order plan that meets the purpose. In addition, the creation and display of the above plan are not only executed once at the time of the introduction plan of time-varying water supply and self-leveling, but also when the environment changes, such as when a new water intake point is added or removed in the target water supply area, or when the storage water volume of the water intake point changes. It can also be used.

Example

[0083] In Example 1, it is assumed that the water demand in the water supply area at the goal time (the time when the introduction of time-varying water supply and self-leveling is completed for all water intake points) does not change significantly from the current situation. In contrast, Example 2 is an example when it is assumed that the water demand in the water supply area at the goal time changes from the current situation. Since the storage water surplus also changes with the change in water demand at the goal time and intermediate stages, different processing from Example 1 is required for the creation of the above introduction order. In Example 2, for example, it is assumed that introductions are made for two water intake points after 5 years, introductions are made for another two water intake points after 10 years, and introductions are made for another two water intake points after 15 years. The introduction time of time-varying water supply and self-leveling for each water intake point and the number of water intake points introduced in each period are predetermined.

[0084] In the water use plan support device 101, by executing the following processes (1) to (8), it is possible to create an appropriate introduction order of time-varying water supply and self-leveling for each water intake point from the current state to the goal state based on the above concept.

[0085] (1) Registration of facility information (2) Acquisition of measurement data (3) Prediction of water distribution amount (demand amount) at each introduction time (4) Determination of the optimal state at each introduction time (5) Calculation of the water storage remaining capacity of each water intake point at each introduction time (6) Creation of a proposed introduction order of time-varying water supply and self-leveling (7) Scoring of the proposed introduction order based on a predetermined index (8) Display of the proposed introduction order Regarding the above processes (1) registration of facility information, (2) acquisition of measurement data, (7) scoring of the proposed introduction order based on a predetermined index, and (8) display of the proposed introduction order, since they are the same as in the first embodiment, the description is omitted.

[0086] First, the prediction process (3) of the water distribution volume (demand) at each introduction time will be described. This process (3) is executed as a pre-process when creating the introduction order of the time-varying water supply and self-leveling for each water receiving point. The demand prediction unit 163 of the water operation plan support device 101 predicts the hourly demand volume (water distribution volume) of each water distribution area 114, 124, 134 on the day when the water demand is the largest at each introduction time of the time-varying water supply and self-leveling (for example, 5 years later, 10 years later, 15 years later, etc.). Here, based on statistical information such as the future population estimate in the water supply area, the increase and decrease rate of water demand for each introduction time from the present is predicted, and the prediction is made by multiplying the above increase and decrease rate by the water distribution volume performance data (data on the day when the water demand is the largest) used in the water operation plan simulation for determining the goal state in the first embodiment. The demand prediction unit 163 registers the demand prediction results at each introduction time in the demand prediction result management table 189. An example of the demand prediction result management table 189 registered by the demand prediction unit 163 is shown in FIG. 14. In FIG. 14, for example, at the time "1:00" of a certain day, "600" is registered as the demand prediction result for introduction time 1 (for example, 5 years later), "550" is registered as the demand prediction result for introduction time 2 (for example, 10 years later), and "500" is registered as the demand prediction result for introduction time 3 (for example, 15 years later). It can be seen that it is predicted that the demand will decrease as the number of years passes.

[0087] As described above, the demand prediction unit 163 performs the registration process of the measurement data.

[0088] Next, the determination process (4) of the optimal state at each introduction time will be described. This process (4) is executed as a preprocess when creating the introduction order of the time-varying water supply and self-leveling for each water intake point. The water operation plan department 164 of the water operation plan support device 101 determines, at each introduction time, the optimal state when introducing the time-varying water supply and self-leveling for all water intake points in the water supply area, similar to Example 1. That is, the state when the self-water is leveled as much as possible by the effect of the time-varying water supply and the self-water facility scale (self-water volume upper limit) is minimized. It can also be considered that the state of each goal is determined when each introduction time is regarded as the goal time point.

[0089] Similar to Example 1, the water operation plan department 164 determines the above optimal state (the state where the self-water facility scale is minimized) at each introduction time based on the water operation plan simulation. In Example 1, the actual water distribution data was used in the water operation plan simulation, while in this Example 2, the demand prediction results for each introduction time registered in the demand prediction result management table 189 are used. Since the other processes are the same, the description is omitted. Then, the maximum self-water volume of each water intake point obtained by the water operation plan simulation at each introduction time is registered in the optimal state management table 190 by introduction time as the self-water facility scale (upper limit) of the optimal state at each introduction time. Fig. 15 shows an example of the optimal state management table 190 by introduction time registered by the water operation plan department 164. In Fig. 15, for example, using the objective function J1 described in Example 1, for water intake point 11, the self-water facility scale "250" of the optimal state at introduction time 1 (for example, 5 years later) is registered as the new upper limit, the self-water facility scale "220" of the optimal state at introduction time 2 (for example, 10 years later) is registered as the new upper limit, and the self-water facility scale "200" of the optimal state at introduction time 3 (for example, 15 years later) is registered as the new upper limit.

[0090] As described above, the water operation plan department 164 performs the determination process of the optimal state at each introduction time.

[0091] Next, the calculation process (5) of the water storage capacity of each water intake point at each introduction time will be described. This process (5) is executed as a pre-process when creating the introduction order of the time-varying water supply and self-leveling for each water intake point. The water storage capacity calculation unit 166 of the water operation plan support device 101 calculates the water storage capacity of each water intake point in the final state when the time-varying water supply and self-leveling are introduced for all water intake points at each introduction time.

[0092] Similar to Example 1, the water storage capacity calculation unit 166 calculates the water storage capacity of each water intake point at each introduction time based on the water operation plan simulation for each water intake point. In Example 1, the actual water distribution data and the self-water facility scale (self-water volume upper limit) at the goal time were used in the water operation plan simulation. In contrast, in this Example 2, the demand prediction results for each introduction time registered in the demand prediction result management table 189 and the minimized self-water facility scale (self-water volume upper limit) that is the optimal state for each introduction time registered in the optimal state management table 190 by introduction time are used. Since the other processes are the same, the description is omitted. Then, the water storage capacity of each water intake point at each introduction time obtained by the water operation plan simulation for each water intake point at each introduction time is calculated and registered in the water storage capacity management table 191 by introduction time. Fig. 16 shows an example of the water storage capacity management table 191 by introduction time registered by the water storage capacity calculation unit 166. In Fig. 16, for example, using the objective function J2 described in Example 1, the water storage capacity "3000" at the introduction time 1 (e.g., 5 years later) is registered as a new water storage capacity, the water storage capacity "2500" at the introduction time 2 (e.g., 10 years later) is registered as a new water storage capacity, and the water storage capacity "2000" at the introduction time 3 (e.g., 15 years later) is registered as a new water storage capacity.

[0093] As described above, the water storage capacity calculation unit 166 performs the calculation process of the water storage capacity of each water intake point at each introduction time.

[0094] Next, the creation process (6) of the introduction order plan for time-varying water supply and self-leveling will be described. This process (6) is basically executed in the planning stage of the introduction of time-varying water supply and self-leveling. Here, in the second embodiment, for example, it is assumed that introductions are made to two receiving points after 5 years, further introductions are made to two more receiving points after 10 years, and further introductions are made to two more receiving points after 15 years, etc., and the introduction times of time-varying water supply and self-leveling for each receiving point and the number of receiving points to be introduced at each time are predetermined.

[0095] The introduction order plan creation unit 167 of the water operation plan support device 101 refers to the storage capacity management table 191 by introduction time and the optimal state management table 190 by introduction time, and newly creates the introduction order plan (the order of receiving points corresponding to the number of receiving points to be introduced) and the self-water facility scale (self-water volume upper limit) at the time of introduction at each introduction time as the introduction order plan. FIG. 17 shows a flowchart of the process of newly creating the introduction order plan and the self-water facility scale at the time of introduction at each introduction time when each introduction time is from the first introduction time 1 to the last introduction time T.

[0096] In step S1701, set t = 1.

[0097] In step S1702, the introduction order plan creation unit 167 refers to the storage capacity management table 191 by introduction time, and creates the introduction order at the introduction time t so as to introduce time-varying water supply and self-leveling in order from the non-introduced receiving points with high storage capacity at the introduction time t. For example, for receiving points A and B, the introduction order plan creation unit 167 creates the introduction order (receiving point A, order 1), (receiving point B, order 2) at the introduction time 1 registered in the storage capacity management table 191 by introduction time.

[0098] In step S1703, the introduction order plan creation unit 167 sets the self-water facility scale at the time of introduction of each receiving point selected as the introduction target to the self-water intake scale A1 (m of the optimal state of the receiving point at the introduction time t in the optimal state management table 190 by introduction time. 3Set (h). For example, the introduction order plan creation unit 167 sets the self - water facility scale of water intake point A at the first introduction time (5 years later) to "100" (see Fig. 18). However, if A1 (the self - water facility scale of the water intake point at the first introduction time) is smaller than A2 (the optimal state self - water facility scale of the water intake point at the final introduction time T (for example, introduction time 3, 15 years later)) in the optimal state management table 190 by introduction time (e.g., "600") (m 3 / h) (A1 < A2), set A2 as the self - water facility scale at the time of introduction of the water intake point. In this example, since the self - water facility scale A1 "100" is smaller than the self - water facility scale A2 "600", the self - water facility scale A2 "600" is set. This is because even if the self - water facility scale at the time of introduction at the water intake point is set to the optimal state self - water facility scale A1 at introduction time t, it is necessary to increase it to the optimal state self - water facility scale A2 at the final introduction time T, so the self - water facility scale at the time of introduction is set to A2 from the beginning.

[0099] In step S1704, if t < T, proceed to step S1705; if t = T, proceed to step S1706.

[0100] In step S1705, set t to t + 1. By repeating steps S1702 to S1705 until t = T, the introduction order and self - facility scale at each introduction time are determined.

[0101] For example, when the processes of steps S1702 and S1703 are performed at t = 1 (5 years later), an introduction order of "Water intake point A (order 1), Water intake point B (order 2)" is set in record 1801 shown as an example of the self-water facility scale in the lower part of FIG. 18, and the self-water scales of each water intake point, "600" and "200", are set. Further, when the processes of steps S1702 and S1703 are performed at t = 2 (10 years later), an introduction order of "Water intake point C (order 1), Water intake point F (order 2)" is set in record 1802 shown as an example of the self-water facility scale in the lower part of FIG. 18, and the self-water scales of each water intake point, "300" and "350", are set. Then, when the processes of steps S1702 and S1703 are performed at t = 3 (15 years later), an introduction order of "Water intake point D (order 1), Water intake point E (order 2)" is set in record 1803 shown as an example of the self-water facility scale in the lower part of FIG. 18, and the self-water scales of each water intake point, "400" and "500", are set.

[0102] In step S1706, when the self-water facility scale B1 (m 3 / h) of each water intake point at the time of introduction is larger than the self-water facility scale B2 (m 3 / h) of the corresponding water intake point in the optimal state at the final introduction time T in the optimal state management table 190 by introduction period (B1 > B2), B2 is set as the self-water facility scale at the final introduction time T of the corresponding water intake point.

[0103] For example, the introduction order plan creation unit 167 compares the self-water scale "350" of the water intake point F at t = 2 with the self-water scale "100" of the water intake point F at t = 3. Since the latter is smaller than the former, the latter self-water scale "100" is used to modify the once-set self-water facility scale and set it to 1804 as the self-water facility scale at the final introduction time. This is because although the self-water facility scale B1 at the time of introduction at the corresponding water intake point is considered, it can be reduced to the self-water facility scale B2 in its optimal state at the final introduction time T. Therefore, the self-water facility scale is set to B2 at the final introduction time T.

[0104] As described above, based on the water storage capacity of each water intake point and the scale of the self-water supply facility in the optimal state at each introduction time, a proposed introduction order and the scale of the self-water supply facility at the introduction time (and the final introduction time) are newly created as the proposed introduction order at each introduction time. An example of the process of determining the proposed introduction order and the scale of the self-water supply facility according to the flowchart shown in FIG. 17 is shown in FIG. 18. In FIG. 18, the scale of the self-water supply facility for each of the water intake points ABCDEF at the final introduction time is set to "600", "200", "300", "400", "500", "100" by the processing from steps S1701 to S1706. It should be noted that the water storage capacity and the optimal self-water scale at the introduction times 1, 2, and 3 for each of the water intake points ABCDEF shown in the upper part of FIG. 18 are assumed to be obtained by the water operation plan simulation for each water intake point described so far.

[0105] The proposed introduction order creation unit 167 registers the created proposed introduction order and the scale of the self-water supply facility of each water intake point at the introduction time (and the final introduction time) in the proposed introduction order management table 187. An example of the proposed introduction order management table 187 registered by the proposed introduction order creation unit 167 is shown in FIG. 19. In FIG. 19, for example, at the introduction time 1, a proposed introduction order is registered in which the water intake point 13 is in the order 1 and the water intake point 11 is in the order 2.

[0106] As described above, the proposed introduction order creation unit 167 performs the process of creating a proposed introduction order for time-varying water supply and self-water level standardization.

[0107] As described above, in this embodiment, as described with reference to FIG. 17 and the like, a demand prediction unit (demand prediction unit 163) that predicts the future water distribution amounts of the water intake points in a plurality of periods using predetermined statistical information (for example, future population projections in the water supply area) is further provided. The goal state determination unit (water operation plan unit 164) solves a predetermined water operation plan problem using the predicted water distribution amount data of each water intake point, thereby determining, for each period, the variable water supply to each water intake point and the scale of the self-water facility of each water intake point in each period when the self-leveling is introduced at each water intake point. The storage capacity calculation unit (storage capacity calculation unit 166) calculates the storage capacity of each water intake point in each period when the determination is made using the predicted result of the demand for the water distribution amount and the scale of the self-water facility of each water intake point in each period obtained from a water operation plan simulation using the scale of the self-water facility of each water intake point, where the predicted result of the demand for the water distribution amount satisfies a predetermined condition (for example, the maximum value). The introduction order creation unit (introduction order plan creation unit 167) creates an introduction order plan for the time-varying water supply and the introduction of self-leveling for each water intake point for each period based on the magnitude of the storage capacity of each water intake point in each period. Therefore, an introduction order plan can be created based on long-term demand prediction.

[0108] As described above, according to the embodiment of the present invention, even when future water demand changes, at each introduction time from the current state to the goal state, a feasible introduction order plan for time-varying water supply and self-leveling for each water receiving point is displayed. Therefore, it becomes possible to determine the introduction order plan with confidence without worrying about the feasibility at the time of introduction. In addition, since the introduction order plan is scored based on a predetermined index, it becomes possible to determine an introduction order plan that meets the purpose. Further, the creation and display of the above order plan are not only executed once at the time of planning the introduction of time-varying water supply and self-leveling, but also when the environment changes, such as when new water receiving points are added or removed in the target water supply area, or when future demand changes. Thus, according to this embodiment, by flexibly adjusting the water supply amount (water receiving amount), it is possible to propose a water operation plan that takes into account the environment in which effective downsizing of the waterworks' own water facilities can be realized. As a result, it is possible to reduce the power consumption generated by the operation of unnecessary facilities, realize stable water supply, achieve further energy savings compared to the past, reduce the environmental load, and contribute to the realization of a society friendly to the global environment.

[0109] Although described in detail with reference to the drawings above, the present invention is not limited to the above various examples, and various modifications are possible without departing from the spirit thereof.

Explanation of Reference Numerals

[0110] 101…Water operation plan support device, 102…Water supply system, 103…Water purification plant for water use, 104, 113, 123, 133…Monitoring and control system, 105…Network, 11, 12, 13…Water receiving points, 111, 121, 131…Water storage tanks, 112, 122, 132…Own water facilities, 113, 123, 133…Water storage tanks, 114, 124, 134…Water distribution areas, 151…CPU, 152…Memory, 153…Storage, 154…Input I / F, 155…Input section, 156…Output I / F, 157…Display section, 161…Facility information registration section, 162…Measurement data acquisition section, 163…Demand prediction section, 164…Water operation planning section, 166…Storage capacity calculation section, 167…Introduction order plan creation section, 168…Introduction order plan scoring section, 169…Introduction order plan display section, 181…Water treatment plant information management table, 182…Water intake point information management table, 183…Measurement data management table, 185…Optimal state management table at goal time, 186…Storage capacity management table, 187…Introduction order plan management table, 188…Scoring result management table, 189…Demand prediction result management table, 190…Optimal state management table by introduction time, 191…Storage capacity management table by introduction time

Claims

1. A water operation planning support device that supports water operation at each water receiving point that distributes received water supply water and self-owned water to consumers, a goal state determination unit that determines the scale of the self-water facility at each of the water receiving points when a variable water supply that changes the supply amount for each of the water receiving points according to time and a self-leveling that levels out the self-water amount at each of the water receiving points are introduced by solving a predetermined water operation planning problem using the actual water distribution amount data for each of the water receiving points; a water storage capacity calculation unit that calculates the water storage capacity at each of the water receiving points at the time of the determination, using the water distribution volume record data and the scale of the own water facility that satisfy a predetermined condition for the water demand used in the determination, obtained from a water operation plan simulation for each of the water receiving points using the water distribution volume record data and the scale of the own water facility; an introduction sequence creation unit that creates an introduction sequence plan for the time-varying water supply and the self-leveling for each of the water receiving points from the current state to the scale of the self-water facility based on the size of the water storage capacity of each of the water receiving points; A water management plan support device comprising:

2. The introduction order creation unit evaluates the feasibility of the introduction order plan created based on the water management plan simulation, and modifies the introduction order plan so that the introduction order plan is feasible.

2. The water management plan support device according to claim 1.

3. A demand forecasting unit that forecasts future water distribution amounts of the water receiving points for multiple periods using predetermined statistical information, The goal state determination unit solves a predetermined water operation planning problem using the predicted water distribution data of each of the water-receiving points to determine the variable water supply to each of the water-receiving points in each period and the self-leveling scale of each of the water-receiving points in each period when the self-leveling is introduced at each of the water-receiving points; the water storage capacity calculation unit calculates the water storage capacity of each water receiving point at each of the periods when the determination is made, using the predicted result of the demand for the water distribution volume and the size of the own water facility, which are obtained from a water operation plan simulation using the predicted result of the demand for the water distribution volume and the size of the own water facility at each of the water receiving points at each of the periods, such that the water demand used in the determination satisfies a predetermined condition; the introduction sequence creation unit creates an introduction sequence plan for the time-varying water supply and the self-leveling for each of the water-receiving points for each of the time periods based on the size of the water storage capacity of each of the water-receiving points for each of the time periods; 2. The water management plan support device according to claim 1.

4. an introduction order proposal scoring unit that scores the created introduction order proposal based on a predetermined index; The water management plan support device according to claim 1, further comprising:

5. A water operation planning support method for supporting water operation at each water receiving point that distributes received water supply water and self-owned water to consumers, comprising: a goal state determination step for determining the scale of the self-water facility at each of the water receiving points when a variable water supply that changes the supply amount for each of the water receiving points according to time and a self-leveling that levels out the self-water amount at each of the water receiving points are introduced by solving a predetermined water operation planning problem using the actual water distribution amount data for each of the water receiving points; a water storage capacity calculation step of calculating a water storage capacity at each of the water receiving points at the time of the determination, using the water distribution volume record data and the scale of the own water facility that satisfy a predetermined condition for the water demand used in the determination, obtained from a water operation plan simulation for each of the water receiving points using the water distribution volume record data and the scale of the own water facility; an introduction order creation step of creating an introduction order plan of the time-varying water supply and the self-leveling for each of the water receiving points from the current state to the scale of the self-water facility based on the size of the water storage capacity of each of the water receiving points; A water management plan support method comprising:

6. In the introduction order creation step, the feasibility of the created introduction order plan is evaluated based on the water management plan simulation, and the introduction order plan is modified so that it is feasible.

6. The water management plan support method according to claim 5.

7. A demand forecasting step of forecasting a future water supply amount of the water receiving point for a plurality of periods using predetermined statistical information, In the goal state determination step, a predetermined water operation planning problem is solved using the predicted water distribution data of each of the water receiving points, thereby determining the variable water supply to each of the water receiving points in each period and the self-leveling scale of each of the water receiving points in each period when the self-leveling is introduced at each of the water receiving points; In the water storage capacity calculation step, the water storage capacity of each water receiving point at each of the periods at the time of the determination is calculated using the predicted water distribution demand and the scale of the own water facility at each of the water receiving points at each of the periods, which are obtained from a water operation plan simulation using the predicted water distribution demand and the scale of the own water facility at each of the water receiving points at each of the periods, and which satisfy a predetermined condition for the water demand used in the determination; In the introduction sequence creation step, a proposal for an introduction sequence of the time-varying water supply and the self-leveling to each of the water-receiving points for each of the periods is created based on the size of the water storage capacity of each of the water-receiving points for each of the periods.

6. The water management plan support method according to claim 5.

8. an introduction order proposal scoring step of scoring the created introduction order proposal based on a predetermined index; The water management plan support method according to claim 5, further comprising:

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