WO2014141836A1

WO2014141836A1 - Distribution reservoir water level setting device, distribution reservoir water level setting method, and distribution reservoir water level setting system

Info

Publication number: WO2014141836A1
Application number: PCT/JP2014/053903
Authority: WO
Inventors: 勝也横川; 理山中; 寿治杉野
Original assignee: 株式会社東芝
Priority date: 2013-03-14
Filing date: 2014-02-19
Publication date: 2014-09-18
Also published as: JP2014178816A; CN105009161A; JP5701919B2; CN105009161B

Abstract

This distribution reservoir water level setting device is provided with a recording unit, a simulation unit, a peak power assessment unit, and a power charge calculation unit. The recording unit records plant data and water demand data. The simulation unit calculates the amount of water sent to a distribution reservoir by a plurality of pumps on the basis of the plant data, calculates the water level of the distribution reservoir on the basis of the relationship between the amount of water sent and the water demand data, and increases or decreases the number of pumps when the water level approaches an upper or lower limit value for the distribution reservoir. The peak power assessment unit calculates a quantity of power and peak power on the basis of the amount of water sent. The power charge calculation unit calculates a power charge on the basis of the peak power and the quantity of power. The simulation unit establishes, as setting values, the upper and lower limit values for the distribution reservoir which minimize the power charge.

Description

Reservoir water level setting device, distribution reservoir water level setting method and distribution reservoir water level setting system

The embodiment of the present invention is a distribution system used in a process of supplying water to a distribution reservoir or a receiving reservoir (hereinafter collectively referred to as a distribution reservoir) with a water supply pump in order to distribute purified water that has been subjected to water purification treatment at a water purification plant to consumers. The present invention relates to a water reservoir water level setting device, a water reservoir water level setting method used in this device, and a water reservoir water level setting system.

Demand for water changes from moment to moment depending on human life patterns. The distribution reservoir has the main role of producing the following two advantages by suppressing fluctuations in the amount of water delivered. That is, it is to carry out water purification treatment stably at a water purification plant, and to secure a certain amount of purified water so as to ensure time for water supply even in an emergency. The water purification plant operator constantly monitors the water level in the reservoir and activates or stops the pump that supplies water to the reservoir. In addition, the water treatment plant operator constantly monitors the water level of the reservoir and operates the flow rate of the pump that supplies the water to the reservoir. Thereby, the water reservoir can maintain the water level in a predetermined operational water level upper and lower limit range and can perform the above-mentioned role.

On the other hand, in general, pump power for pumping clean water to the reservoir is not considered. Therefore, if the water level of the reservoir is maintained within the upper and lower limits of the water level, excessive pump power may be temporarily generated in the morning and evening hours when the water demand peaks. As a result, the power peak consumed in the water purification plant increases, and high contract power may occur.

A method has been proposed in which a pump water supply plan is formulated as an optimization problem to obtain a solution. However, this method has a problem that a lot of man-hours are required for system construction and parameter adjustment.

Japanese Patent No. 4914111 JP 2012-160170 A

As described above, when the operator tries to maintain the water level in the reservoir within the upper and lower limits of the water level, excessive pump power may be temporarily generated. Therefore, the power peak consumed in the water purification plant becomes high, and there is a risk that high contract power will be generated.

Therefore, the purpose is to set the upper and lower limits of the reservoir that can suppress the generation of excessive pump power and prevent the increase in contract power when the operator maintains the water level of the reservoir within the upper and lower limits of the reservoir. The object is to provide a reservoir level setting device, a reservoir level setting method and a reservoir level setting system used in this device.

According to the embodiment, the distribution reservoir water level setting device includes a recording unit, a simulation unit, a power peak evaluation unit, and a power amount charge calculation unit. The recording unit records in advance plant data including information on a plurality of pumps and distribution reservoirs installed in the plant and past water demand data. The simulation unit calculates a water supply amount to the distribution reservoir of the plurality of pumps based on the plant data, calculates a water level of the distribution reservoir based on a relationship between the water supply amount and the water demand data, When the water level is close to the upper and lower limits of the reservoir, the number of pumps for calculating the water supply amount is increased or decreased. The power peak evaluation unit calculates a power amount per predetermined time based on the water supply amount and a peak power that takes a maximum value among the power amount. The power amount charge calculation unit calculates a power amount charge based on the power amount and the peak power, and causes the display device to display a calculation result of the power amount charge. The simulation unit uses a water reservoir upper and lower limit value capable of suppressing the electricity charge as a set value.

FIG. 1 is a diagram illustrating a water supply process to which the reservoir water level setting device according to the first embodiment is applied. FIG. 2 is a diagram illustrating a functional configuration of the reservoir water level setting device according to the first embodiment. FIG. 3 is a diagram illustrating an example of the upper and lower limits of the reservoir that is input to the simulation unit illustrated in FIG. 2. FIG. 4 is a diagram showing a flowchart when the reservoir water level setting device shown in FIG. 2 sets the reservoir water level operation rule. FIG. 5 is a block diagram showing another configuration of the reservoir water level setting device shown in FIG. FIG. 6 is a block diagram showing another configuration of the reservoir water level setting device shown in FIG. FIG. 7 is a diagram illustrating an example of a table obtained by the process performed by the simulation unit illustrated in FIG. FIG. 8 is a diagram illustrating an example of the upper and lower limits of the reservoir that are input to the simulation unit illustrated in FIG. 2. FIG. 9 is a diagram showing an example of a table obtained based on the upper and lower limits of the reservoir shown in FIG. FIG. 10 is a block diagram illustrating a functional configuration of a distribution reservoir water level setting device according to the second embodiment. FIG. 11: is a block diagram which shows the function structure of the reservoir water level setting apparatus which concerns on 3rd Embodiment. FIG. 12 is a diagram showing a system diagram when the function of the reservoir level setting device shown in FIG. 2 is included in the cloud server.

Hereinafter, embodiments will be described with reference to the drawings.

(First embodiment)
1st Embodiment demonstrates the case where an operator sets the upper and lower limit range of the reservoir water level which should be monitored every day.

FIG. 1 is a diagram schematically illustrating a water supply process to which a reservoir water level setting device 10 according to the first embodiment is applied. In the water supply process shown in FIG. 1, the purified water is sent from the water purification plant (not shown) to the distributing reservoir 20 by the pump 30. In the water supply process, the number of water pumps operated y _k [units] and the amount Q of water supply Q are maintained so as to keep the reservoir water level l _k [m] within a predetermined range while satisfying the water demand q _k [m ³ / h]. _The operator operates _k [m ³ / h]. In addition, the operator may operate so as to keep the water level of the reservoir high by the morning of 6:00, for example, when the water demand increases rapidly. In this embodiment, the upper and lower limit values of the reservoir that allow the fluctuation of the reservoir level l _k are referred to as a reservoir level operation rule. Note that k indicates time, and k = 1, 2,..., 24 (hour unit).

FIG. 2 is a diagram illustrating a functional configuration of the reservoir water level setting device 10 according to the first embodiment. Reservoir water level setting device 10 shown in FIG. 2 includes, for example, a central processing unit (CPU) and programs and data for CPUs such as Read Only Memory (ROM) and Random Access Memory (RAM) to execute processing. Includes storage area. The reservoir level setting device 10 constructs the simulation unit 11, the power peak evaluation unit 12, and the power rate calculation unit 13 by causing the CPU to execute an application program. In addition, the water reservoir level setting device 10 includes a recording unit 14 and an input unit 16. The recording unit 14 records a plant database 141 and a water demand database 142. The plant database 141 records data indicating characteristics of the water supply plant in advance as plant data. The plant data recorded in the plant database 141 includes, for example, the pipe resistance r [−], the altitude H [m] from the water pump 30 to the reservoir 20, the reservoir area S [m ² ], and the water pump This is data indicating 30 characteristics (coefficients a, b, c) and the like. The water demand database 142 records the past water demand data in advance. The past water demand data recorded in the water demand database 142 includes, for example, water demand data for each of the four seasons, water demand data from Monday to Friday, Water demand data, Sunday water demand data, and holiday water demand data.

The simulation unit 11 calculates the reservoir water level l _k at time _k by the following equation.

The simulation unit 11 reads data indicating the reservoir area S from the plant database 141. Also, the simulation unit 11, for example, reads the past year, the water demand data for the past predetermined period from the water demand database 142, acquires data indicating the water demand q _k. Simulation unit 11, the water supply amount _{Q k,}

Ask from. The simulation unit 11 reads data indicating the pipe resistance r, the altitude H, and the pump characteristic coefficients a, b, and c from the plant database 141.

Here, the number y _k is calculated by a simulation calculation by the simulation unit 11. That is, when the reservoir level l _k calculated by the equation (1) reaches a predetermined value with respect to the upper limit value l _kmmax set by the operator of the reservoir level setting device 10, the simulation unit 11. Reduce the number of operating pumps 30 by one. Further, the simulation unit 11 determines that the reservoir water level l _k calculated by the equation (1) reaches a predetermined value with respect to the reservoir lower limit l _kmin set by the operator of the reservoir water level setting device 10. Increase the number of operating pumps 30 by one. For example, as shown in FIG. 3, the simulation unit 11 reduces the pump 30 by one when the reservoir water level l _k is near the upper limit l _kmax at the time “13:00”. Thereafter, the simulation unit 11 increases the number of pumps by one when the reservoir water level l _k is near the lower limit l _kmin at time “2 o'clock”. Thereafter, the simulation unit 11 at time "6 o'clock", in order to maintain a high distribution reservoir water level l _k, further the pump 30 is activated one.

The simulation unit 11 outputs data indicating the water supply amount Q _k of k = 1,..., 24 to the power peak evaluation unit 12 as data indicating a pump operation plan.

The power peak evaluation unit 12 evaluates the power peak based on the pump operation plan obtained from the simulation unit 11. That is, the power peak evaluation unit 12 calculates the power amount P _k at k = 1,.

Here, K = 24, and each function is as follows.

D, e, and f are parameters representing pump efficiency characteristics. The power peak evaluation unit 12 reads data indicating the parameters d, e, and f from the plant database 141. The power peak evaluation unit 12 acquires max (P _k ) that is the maximum P _k among the calculated power amounts P ₁ to P ₂₄ . The power peak evaluation unit 12 outputs data indicating the power amount P _k and data indicating the peak power max (P _k ) to the power rate calculation unit 13.

The power rate calculation unit 13 calculates the power rate for a certain period T (days) based on the power amount P _k and the peak power max (P _k ) obtained from the power peak evaluation unit 12 and the power rate system given from the outside. calculate. Here, the electricity rate is

It is. Basic charges and electricity charges are

It is. As shown by the equation (7), the basic charge depends on the peak power. Note that y is the basic unit price [yen / kwh / month] based on the contract power, and x is the unit price [yen / kwh] of the electric energy charge.

The power charge calculation unit 13 causes the display device 40 to display the calculated power charge.

The operator of the water supply process confirms the power rate displayed on the display device 40. Operator is different distribution Ikegami lower limit _l _kmax, if you want to check the power rate for _{l kmin,} distribution Ikegami lower limit _l _kmax, and inputs data indicating _{l kmin} to the newly simulation unit 11. The operator was newly input distribution Ikegami lower limit _l _kmax, relative _{l kmin,} confirms power rate calculated by the distribution reservoir water level setting device 10. The operator may, distribution Ikegami lower limit power rate is suppressed to small amount value _l _kmax, selects _{l kmin.} Distributing reservoir water level setting device 10 has been selected in the operator distribution Ikegami lower limit _l _kmax, it sets the _{l kmin} as distribution reservoir water level operating rules.

Next, the operation when a distribution reservoir water level operation rule is set by the distribution reservoir water level setting device 10 configured as described above will be described. FIG. 4 is a diagram illustrating a flowchart when the distribution reservoir water level setting device 10 sets distribution reservoir water level operation rules.

First, the simulation unit 11, distribution Ikegami lower limit _l kmax input from the _operator, receiving data indicating a _{l kmin} (step S41). Simulation unit 11, together with the operator activates the pump while monitoring the lower limit range on the distribution reservoir water level, the assumption that the process stops the pump, water distribution Ikegami lower limit l _kmax, with reference to the l _kmin water amount Q _k is calculated. The simulation unit 11 outputs data indicating the pump operation plan to the power peak evaluation unit 12 (step S42).

The power peak evaluation unit 12 calculates the power amount P _k and the peak power max (P _k ) based on the pump operation plan (step S43).

Based on the calculated power amount P _k and peak power max (P _k ), the power charge calculation unit 13 calculates a power charge for a certain period T (step S44) and causes the display device 40 to display the power charge.

The operator confirms the electricity rate displayed on the display device 40.

Subsequently, the simulation unit 11, a new distribution Ikegami lower limit _l kmax by _operator, determines whether there is input data indicating the _{l kmin} (step S45). When there is an input (Yes in step S45), the simulation unit 11 performs the process of step S42 again.

When there is no input (No of step S45), the simulation part 11 judges whether the setting instruction | indication was input from the operator (step S46). When entered (Yes in step S46), the simulation unit 11, distribution Ikegami lower limit _l kmax with setting _instruction, it sets a _{l kmin} as distribution reservoir water level operation rules (step S47). When there is no input (No in step S46), the simulation unit 11 performs the process of step S45 again.

As described above, in the first embodiment, the simulation unit 11 calculates the water supply amount Q _k by simulation based on the input _reservoir upper and lower limit values l _kmax and l _kmin , and obtains a pump operation plan. The power peak evaluation unit 12 calculates the amount of power and the peak power based on the pump operation plan. And the electric power charge calculation part 13 is made to calculate an electric power charge based on electric energy and peak electric power. The operator selects the upper and lower limits of the reservoir that can most curb the electricity rate.

The operator adopts the reservoir level operation rules set in this way, and operates the water pump 30 by monitoring whether the reservoir level does not deviate from the upper and lower limits of the reservoir as in normal operation. As a result, the operator can suppress the power peak without paying special attention. The basic fee is set by a contract with an electric power company based on peak power in time units, as shown by the equation (7). Since the operator can suppress the electric power peak, the contract electric power with the electric power company can be reduced. Furthermore, since the operator can reduce the contract power with the electric power company, the annual power charge can be reduced.

Therefore, according to the reservoir water level setting device 10 according to the first embodiment, the operator maintains the water level of the reservoir in the upper and lower limits of the water level, thereby suppressing the generation of excessive pump power and increasing contract power. It is possible to set the reservoir water level that can prevent Thereby, it becomes possible to suppress the required electric power in a water transmission plant, and it can also contribute to local electric power system stabilization.

In the present embodiment, in the equation (8), the unit price of the electric energy charge is described as an example in which the unit price of the electric energy charge is constant without depending on the time k, but is not limited thereto. For example, the unit price of the electric energy charge may be defined from the outside as x _k depending on the time k in consideration of the late-night electric energy charge.

Moreover, the reservoir level setting device 10 according to the present embodiment may be connected to the printing device 50 as shown in FIG. When the operator sets the distribution reservoir water level operation rule, the simulation unit 11 causes the printing device 50 to print the distribution reservoir water level operation rule. For example, in FIG. 5, the printing apparatus 50 prints “Operation of XX month XX day, water level XXm to XXm”. This makes it possible for all operators to share the value of the reservoir water level that the operator should monitor in the future.

Further, the reservoir level setting device 10 according to the present embodiment may include a correction unit 15 as shown in FIG. There may be an error between the water demand recorded in the water demand database 142 and the water demand in the assumed period. Here, the error includes an error due to population transition, an error due to increase / decrease of water distribution areas, an error due to temperature fluctuation, and the like.

* The correction | amendment part 15 receives the error ((circle)) of the water demand assumed from an operator. The correction | amendment part 15, if the error ((circle)%) of water demand is received, reads the plant data recorded on the plant database 141, and calculates the error of a water level. The correction unit 15 outputs data indicating the calculated water level error to the simulation unit 11.

The simulation unit 11 performs a simulation including the error of the water level calculated by the correction unit 15. Operator, based on the electricity rate simulated by such processing, the optimal water distribution Ikegami lower limit l _kmax, selects l _kmin. Operator is thus selected distribution Ikegami lower limit l _kmax, distributing reservoir water level in the range of l _kmin operates the water supply pump 30 to fit. As a result, the operator can reduce the power peak even when the error in the water demand is the maximum, and the power charge can be reduced.

Further, the distributing reservoir water level setting device 10 according to the present embodiment, the simulation unit 11, distribution Ikegami lower limit l _kmax input as a fixed _value, it has been described as an example the case of performing the simulation based on l _kmin. However, it is not limited to this. For example, the simulation unit 11, distribution Ikegami lower limit _l kmax is set in _hours, it may be executed a simulation based on _{l kmin.} Depending on the relationship between the water demand and the amount of stored water, for example, it is necessary to maintain the reservoir level high in preparation for the morning water demand peak. When the upper and lower limits of the distributing reservoir are constant values, for example, as shown in FIG. 7, there is a possibility that a time zone in which three water pumps 30 are activated is inevitably generated. If the state in which three water pumps 30 are activated is maintained, the power peak becomes high, which causes an increase in power charges. Therefore, for example, as shown in FIG. 8, the operator inputs a high value for the lower limit of the reservoir at night when water demand is low. Simulation unit 11 is thus entered distribution Ikegami lower limit _l _kmax, executes simulation based on _{l kmin.} Figure 9 is a distribution Ikegami lower limit _l kmax shown in FIG. 8 _shows a simulation result based on _{l kmin.} According to FIG. 9, by dynamically changing the reservoir lower limit value at night, it becomes possible to prepare for the morning water demand peak while maintaining the reservoir level at night as high as possible. Operator is distribution Ikegami lower limit l _kmax, repeatedly enter the l _kmin by the hour, selecting a distribution Ikegami lower limit capable of most suppress power rates. By adopting the reservoir water level operation rule set from the selected upper limit value of the reservoir, the operator can set the number of driven water pumps 30 to two. Since the number of water pumps 30 to be driven can be reduced, the power peak in the water supply process can be suppressed, and it is possible to avoid an increase in power charges.

Further, the distributing reservoir water level setting device 10 according to the present embodiment, the simulation unit 11, distribution Ikegami lower limit l _{kmax input,} it has been described as an example a case of executing a simulation based on l _kmin. However, it is not limited to this. For example, the simulation unit 11 may adopt an operator's own reservoir water level operation rule. For example, the following if-then rule may be adopted as the distribution reservoir water level operation rule. This rule is an operation rule in which the number of operating pumps is increased in advance to prepare for a water demand peak at around 8:00 in the morning as shown in FIG.

If Time t = 4:00 && Reservoir level <4.0m
Then Pump operation number = Pump operation number +1
By adopting such a reservoir level operation rule, the simulation unit 11 can output a simulation result indicating that the reservoir level is maintained high at about 6:00 in the morning when the water demand peak is reached. . Operator is distribution Ikegami lower limit l _kmax, repeatedly enter the l _kmin, selects a distribution Ikegami lower limit capable of most suppress power rates.

In this way, in addition to the upper and lower limits of the reservoir, the operator's own judgment is also adopted as the reservoir water level operation rules, so that the operator can monitor the reservoir water level with a sense close to a skilled operator and use the water pump. 30 can be operated.

In addition, when the printing device 50 is connected to the distribution reservoir water level setting device 10, in addition to the contents of “Operation of XX month XX day, please set the water level XXm to XXm.” If the water level in the reservoir is less than 4 m, please add one more pump. "

In the first embodiment, the simulation unit 11 has been described by taking as an example a case in which features such as seasons and days of the week in the past water demand data are not considered. However, it is not limited to this. The simulation unit 11 may read water demand data for a specified period such as a season and a day of the week from the water demand database 142 and execute the simulation for each specified period. At this time, the upper and lower limits of the reservoir are input for each designated period. Thereby, the simulation part 11 becomes possible to simulate the fluctuation | variation of the water supply amount correctly at the time of switching from a weekday to a holiday, for example. In addition, the simulation part 11 memorize | stores the data which show the reservoir water level operation rule set for every predetermined | prescribed period, and reads the data which show a corresponding reservoir water level operation rule when it actually becomes that period. Alternatively, the printing apparatus 50 may be made to print.

In Patent Document 1, as a condition for restricting the upper and lower limits of the operation of the distribution reservoir, a pump flow rate plan that minimizes the power cost is drawn up based on the power unit of the pump and the power rate system that is an external factor. Technology has been proposed. However, the invention according to Patent Document 1 does not calculate the upper and lower limits of the reservoir. Moreover, the invention which concerns on patent document 1 does not suppress an electric power peak, and does not reduce contract electric power.

Further, Patent Document 2 proposes a method for controlling a plurality of pumps that achieve a desired reservoir water level even with respect to factors such as changes in the set water level of the reservoir and fluctuations in water demand. However, Patent Document 2 is an invention related to pump water level control, and does not calculate the upper and lower limits of the reservoir.

(Second Embodiment)
In the second embodiment, a case will be described in which the reservoir level setting device 60 automatically determines the upper and lower limits of the reservoir.

FIG. 10 is a block diagram showing a functional configuration of the reservoir level setting device 60 according to the second embodiment. A distribution reservoir water level setting device 60 shown in FIG. 10 includes a simulation unit 61, a power peak evaluation unit 62, a power rate calculation unit 63, and a recording unit 14.

The simulation unit 61 uses the internal engine of the distribution reservoir water level setting device 60. Simulation unit 61, distribution Ikegami lower limit _l kmax input by the _operator, rather than based on _{l kmin,} automatically selected for water distribution Ikegami lower limit _l _kmax, executes simulation based on _{l kmin.} The internal engine solves the optimization problem with the upper and lower limits of the reservoir level as the decision variable. The optimization problem can be formulated as follows, for example.

Here, R represents the allowable change number, and L represents the allowable water level deviation. The permissible water level deviation L is set so that the water levels in the reservoirs substantially coincide at the end and beginning of the day.

There are a plurality of methods for solving the optimization problem represented by Equation (9), and the method is not limited. For example, the solution using the full search algorithm is as follows.

Here, the peak power max (P _k ) is calculated by the power peak evaluation unit 62 and recorded in the memory of the simulation unit 61.

The simulation unit 61 outputs the data indicating the extracted peak power and the data indicating the power amount to the power rate calculation unit 63. In addition, the simulation unit 61 sets the upper and lower limits of the reservoir when the peak power is calculated as the reservoir water level operation rule.

The power charge calculation unit 63 calculates a power charge for a certain period based on the amount of power and peak power obtained from the simulation unit 61 and the power charge system given from the outside. The power charge calculation unit 63 causes the display device 40 to display the calculated power charge.

As described above, distributing reservoir water level setting device 60 according to the second embodiment, automatically distribution Ikegami lower limit _l _kmax, set the _{l kmin,} the set distribution Ikegami lower limit _l _kmax, based on _{l kmin} Run the simulation. The simulation unit 61 extracts the minimum peak power from the peak power calculated for each reservoir upper and lower limit value, and sets the reservoir upper and lower limit value for which the extracted peak power is calculated as the reservoir water level operation rule.

The operator adopts the reservoir level operation rules set in this way, and operates the water pump 30 by monitoring whether the reservoir level does not deviate from the upper and lower limits of the reservoir as in normal operation. Thereby, the operator can suppress the power peak. By being able to suppress the power peak, the operator can reduce the contract power with the power company and, in addition, can reduce the annual power rate.

Therefore, according to the reservoir level setting device 60 according to the present embodiment, the operator maintains the water level of the reservoir in the upper and lower limits of the water level, thereby suppressing the generation of excessive pump power and preventing an increase in contract power. It is possible to set a reservoir level that can be used. Moreover, the improvement point regarding the reservoir level operation which the operator has not noticed can be automatically presented.

In addition, when the simulation part 61 receives the execution instruction of simulation during operation of a water transmission plant, you may make it perform the simulation for acquiring the optimal upper and lower limit value of a current reservoir. If the result of reducing the electricity charge is obtained by changing the current upper and lower limit value of the reservoir, the simulation unit 61 causes the display device 40 to display the upper and lower limit value of the reservoir at that time.

(Third embodiment)
In the third embodiment, a case will be described where the reservoir level setting device 70 avoids operation exceeding the current contract power as much as possible.

FIG. 11 is a block diagram showing a functional configuration of a reservoir level setting device 70 according to the third embodiment. A distribution reservoir water level setting device 70 shown in FIG. 11 includes a simulation unit 11, a power peak evaluation unit 12, a power rate calculation unit 13, a recording unit 14, an input unit 16, and an operable time calculation unit 71.

The operable time calculation unit 71 receives the power usage measured by the power monitoring device 80. Here, the electric energy monitoring apparatus 80 is installed in the water purification plant. The power monitoring device 80 measures the power used by a water pump or the like provided in the water purification plant.

The operable time calculation unit 71 calculates the time until the value of the contract power is exceeded when the current state is continued based on the current value of the contract power. For example, when the water supply amount is insufficient with respect to the water demand and the water pump 30 needs to be operated to the maximum extent, the operable time calculation unit 71 measures the start-up time of the water pump 30, and in the past year The remaining time until exceeding the maximum power amount is calculated in minutes. The drivable time calculation unit 71 causes the display device 40 to display the calculated remaining time. At this time, the display device 40 may emphasize the remaining time and present it to the operator.

As described above, in the third embodiment, the operable time calculation unit 71 calculates the remaining time until the maximum power consumption is exceeded based on the current power consumption and presents it to the operator. . As a result, it is possible to alert the operator so that the amount of power used does not exceed the peak power, so that the operable time calculation unit 71 can suppress an increase in contract power.

Therefore, according to the reservoir level setting device 70 according to the third embodiment, an increase in power peak due to unnecessary pump power can be suppressed, and an increase in contract power can be prevented.

In the third embodiment, the case where the remaining time is calculated has been described as an example, but the present invention is not limited to this. When the current pump operation state is continued for a predetermined period, the operable time calculation unit 71 may acquire whether or not the maximum electric energy for the past one year is exceeded. The drivable time calculation unit 71 causes the display device 40 to display the acquired result.

Moreover, if the operation possible time calculation part 71 adds the electric energy which additionally starts a water pump to the present electric power consumption, there exists a possibility that it may exceed a peak electric power, and there exists a possibility that a reservoir water level may fall below a reservoir lower limit. In this case, it may be acquired whether or not the maximum amount of power for the past year is exceeded due to an increase in the amount of power required for additional activation. The drivable time calculation unit 71 causes the display device 40 to display the acquired result.

(Other embodiments)
In each said embodiment, although the case where the distribution reservoir number setting apparatus was provided in the plant was demonstrated to the example, it is not necessarily limited to this. For example, the cloud server may have the function of the distribution reservoir water level setting device. As an example, FIG. 12 shows a system diagram when the function of the reservoir level setting device 10 shown in FIG. 2 is included in the cloud server 90.

The cloud server 90 shown in FIG. 12 is connected to the plant via a network. The cloud server 90 includes a simulation unit 11, a power peak evaluation unit 12, and a power charge calculation unit 13. The recording unit 14 is provided in the plant.

The cloud server 90 outputs the data indicating the power rate calculated by the power rate calculation unit 13 and the data indicating the reservoir water level operation rule set by the simulation unit 11 to the plant via the network.

As described above, the function of the water reservoir level setting device 10 is included in the cloud server 90, so that the operator maintains the water level of the water reservoir in the upper and lower limit water level, thereby suppressing the generation of excessive pump power. The reservoir water level that can prevent the increase in contract power is set in the cloud server 90. Thereby, since it is not necessary to provide a reservoir level setting device in the water transmission plant, it is possible to suppress the necessary power in the water transmission plant.

Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

Claims

A recording unit for pre-recording plant data including information about a plurality of pumps and distribution reservoirs installed in the plant, and past water demand data;
Based on the plant data, the amount of water delivered to the reservoir by the plurality of pumps is calculated, and the water level of the reservoir is calculated based on the relationship between the amount of water delivered and the water demand data. A simulation unit that increases or decreases the number of pumps when calculating the water supply amount when it is near the lower limit value,
A power peak evaluation unit for calculating a power amount per predetermined time based on the water supply amount and a peak power taking a maximum value among the power amount;
A power amount charge is calculated based on the power amount and the peak power, and a power amount charge calculation unit that displays a calculation result of the power amount charge on a display device;
The simulation unit is a reservoir water level setting device that uses a reservoir upper and lower limit value capable of suppressing the electricity charge as a set value.
The distribution reservoir water level setting device according to claim 1, wherein the simulation unit causes the printing device to print the set value.
When an error in water demand is input, the plant data is read from the recording unit, and includes a correction unit that calculates a water level error based on the error in water demand and the plant data,
The distribution reservoir water level setting device according to claim 1, wherein the simulation unit calculates a water supply amount to the distribution reservoir including the water level error.
The reservoir level setting apparatus according to claim 1, wherein the simulation unit calculates the amount of water supplied to the reservoir by changing the upper and lower limits of the reservoir in time units.
The distribution reservoir water level setting device according to claim 1, wherein the simulation unit increases or decreases the number of pumps when calculating the water supply amount based on an operation rule input from an operator in addition to the upper and lower limits of the distribution reservoir.
The recording unit records water demand data for each predetermined period including the season and day of the week,
The distribution reservoir water level setting device according to claim 1, wherein the simulation unit calculates a water supply amount to the distribution reservoir for each period based on upper and lower limits of the distribution reservoir set for each period.
The reservoir level setting device according to claim 1, further comprising an input unit for an operator to input the upper and lower limits of the reservoir to the simulation unit.
The distribution reservoir water level setting device according to claim 1, wherein the simulation unit automatically selects the upper and lower limit values of the distribution reservoir and calculates a water supply amount to the distribution reservoir.
The distribution reservoir water level setting device according to claim 1, further comprising an operable time calculation unit that calculates a remaining time until the peak power is exceeded based on a power consumption measured by a power monitoring device provided in the plant. .
Using plant data including information about a plurality of pumps and reservoirs installed in the plant, calculating the amount of water delivered to the reservoirs of the plurality of pumps,
Calculate the water level of the reservoir based on the relationship between the amount of water delivered and past water demand data,
When the water level to be calculated is near the upper and lower limits of the distribution reservoir, increase or decrease the number of pumps when calculating the water supply amount,
Based on the amount of water to be calculated, calculate the amount of power per predetermined time and the peak power taking the maximum value of this amount of power,
Calculate a power charge based on the power and the peak power,
Display a calculation result of the electric energy charge on a display device;
A reservoir water level setting method in which the upper and lower limits of the reservoir capable of suppressing the electricity charge are set as set values.
A plant having a plurality of pumps, a distribution reservoir, plant data including information about the pump and the distribution reservoir, and a recording unit that records past water demand data;
A cloud server for monitoring the plant,
The cloud server
Based on the plant data, the amount of water delivered to the reservoir by the plurality of pumps is calculated, and the water level of the reservoir is calculated based on the relationship between the amount of water delivered and the water demand data. A simulation unit that increases or decreases the number of pumps when calculating the water supply amount when it is near the lower limit value,
A power peak evaluation unit for calculating a power amount per predetermined time based on the water supply amount and a peak power taking a maximum value among the power amount;
A power amount charge is calculated based on the power amount and the peak power, and a power amount charge calculation unit for displaying a calculation result of the power amount charge on a display device;
The simulation unit is a distribution reservoir water level setting system that outputs a distribution reservoir upper and lower limit value capable of suppressing the electricity charge as a set value to the plant.