JP2933430B2 - Distribution flow sharing control device between fluid distribution sources - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distribution system for distributing fluid from two fluid distribution sources, such as a water supply pumping station and a water purification plant, to the same fluid demand source.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distribution flow sharing control device between fluid distribution sources, which can prevent a failure of a distribution system due to a deviation of distribution flow between two fluid distribution sources.

[0002]

2. Description of the Related Art Conventionally, for example, when water is distributed from two water distribution stations to the same water distribution network, a skilled operator monitors the actual distribution flow rate values of the two water distribution stations and compares the past experience with the present. Judging from the situation, select a water distribution pump with an appropriate capacity, or start / stop the water distribution plant.
The two distribution stations are operated so that the distribution flow rates of the two distribution stations are balanced and the distribution pressure in the distribution network does not fluctuate extremely.

FIG. 6 to FIG. 8 are diagrams showing an example of the result of operation by the conventional method. Here, (a) of FIG. 6 shows a distribution water flow target value of one of the water distribution stations. FIG. 6 (b) shows a distribution water flow target value of the other water distribution station.

FIG. 7A shows actual demand values which are the sum of the distribution flow rates of water distributed from two water distribution stations to the distribution network. FIG. 7 (b) shows a distribution water flow actual value of one of the water distribution stations. Further, FIG. 8 shows the actual distribution flow rate value of the other water distribution station.

[0005] In Fig. 8, the water distribution is stopped around time 8, but according to Fig. 7 (b), one of the water distribution stations is operating, and the distribution of the distribution flow rate is unbalanced. . At this time, the distribution pressure fluctuates in the distribution pipe network, and there is a possibility that water supply damage such as rupture of the distribution pipe or generation of red water occurs.

[0006] In a water distribution station, the load imbalance to one of the water distribution stations increases the number of times the water distribution pump is started and stopped, thereby hindering efficient operation. Therefore,
In such a case, at time 8 in FIG.
One of the water distribution stations is operated with a lower distribution flow rate.
In such a case, the operation should be performed so as to appropriately share the distribution flow rate so that the operation of the other water distribution station is continued.

In the case of water supply, stable water supply is one of the objectives. Therefore, the distribution of water flow between the two water distribution stations can be maintained properly even if the operator has individual differences or changes in demand patterns. It is necessary to continue operation that does not cause a failure in the system.

[0008] However, in the above-described operation method, the distribution flow rate between the two distribution stations is unbalanced due to individual differences between operators and changes in demand patterns, and a failure occurs in the water distribution system. there is a possibility.

[0009]

As described above, in the conventional operation method, the distribution flow rate between the two water distribution stations is deviated due to individual differences between operators and changes in demand patterns, and the water distribution system is obstructed. There was a problem that occurs.

An object of the present invention is to perform stable operation without depending on individual differences between operators or changes in demand patterns.
It is an object of the present invention to provide a highly reliable distribution flow rate control device between fluid distribution sources, which can prevent a failure of a distribution system due to a deviation of a distribution flow rate between two fluid distribution sources.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above objects, a distribution system for controlling distribution of distribution flow in a distribution system for distributing fluid from two fluid distribution sources with a distribution pump to the same fluid demand source. In the flow sharing control device,

First, according to the first aspect of the present invention, based on the demand forecast value of the distribution flow rate and a preset distribution ratio indicating the distribution ratio of the distribution flow rate according to the capacity of each of the fluid distribution sources. Distribution sharing planning means for determining a sharing plan value to be distributed to each of the fluid distribution sources so that the demand forecast value becomes the sharing ratio; and a sharing plan for each fluid distribution source determined by the distribution sharing planning means. The actual delivery flow rate value of the one fluid supply source is set in advance based on the value.
Plan of the other fluid distribution source when the startup flow rate is exceeded
Value to increase the value of the one fluid source.
Actual delivery flow value is below the preset pump stop flow
When the share plan value of the other fluid distribution source is reduced.
Is corrected to so that a sharing plan correcting means for determining the distribution flow target value to be delivered in each fluid delivery source, based on the delivery flow target value for each fluid delivery source that is determined by the allocation plan correction unit A distribution pump control means for controlling a distribution pump of each of the fluid distribution sources and supplying a fluid amount corresponding to the distribution flow rate target value to the fluid demand source.

Further, in the invention according to the second aspect, in the distribution flow rate sharing control device between the fluid distribution sources, the supply to the fluid demand source is performed based on a predicted value of an element closely related to the fluctuation of the distribution flow rate. Demand forecasting means for forecasting the demand forecast value of the distribution flow rate to be provided is added.

[0014] Here, especially as the sharing plan correction means,
If the actual distribution flow rate of one of the fluid distribution sources is between the pump start flow rate and the pump stop flow rate, each shared plan value is determined as a distribution flow target value to be distributed by each fluid distribution source, and If the actual delivery flow value of the fluid distribution source deviates from between the pump startup flow rate and the pump stop flow rate, if the actual delivery flow rate value of one fluid distribution source exceeds the pump startup flow rate, the other fluid A value obtained by adding the flow rate that can be distributed by one distribution pump of the distribution source to the distribution flow target value of the fluid distribution source one control cycle before is determined as the distribution flow target value of the other fluid distribution source in the current control cycle. If the actual distribution flow rate value of the fluid distribution source is lower than the pump stop flow rate, the flow rate that can be distributed by one water distribution pump of the other fluid distribution source is subtracted from the distribution flow target value of the other fluid distribution source one control cycle earlier. Is the other fluid distribution of the current control cycle. It is determined as the delivery flow target value of the source.

[0015]

Therefore, in the control device for sharing the distribution flow rate between the water distribution stations according to the present invention, the distribution plan value of the other fluid distribution source is corrected in accordance with the actual distribution flow rate value of one of the fluid distribution sources. By determining the target value of the distribution flow rate, the distribution ratio distributed from one fluid distribution source and the other fluid distribution source is the distribution flow actual value of each fluid distribution source and the planned distribution value of each fluid distribution source. Even in a different case, it is possible to prevent one of the fluid supply sources from being biased, and to realize a good operation of one of the fluid supply sources and the other of the fluid supply sources.

[0016] Thus, stable operation can be performed irrespective of individual differences between operators and changes in demand patterns, and it is possible to prevent occurrence of a failure in the distribution system due to a bias in the distribution flow rate between the two fluid distribution sources. Becomes

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing an example of the overall configuration in a case where a distribution flow rate sharing control device between water distribution stations according to the present invention is applied to a water supply distribution system.

In FIG. 1, a plurality of water distribution pumps P1,
And two fluid distribution sources A and B provided with one water pump P2, and water distribution plants 1 and 2, and a distribution network 3 which is the same fluid demand source connected to each of the distribution plants 1 and 2. By
A water supply system is configured. Then, the distribution flow control device 4 for the distribution of water between the water distribution stations causes the water distribution pumps P in the water distribution system A and the water distribution plant 2 in the water distribution system.
1 is supplied to each of the control periods, the target value of the water distribution flow rate is given, the water distribution pumps P1 of the A water distribution plant 1 and the B water distribution plant 2 are operated, and water is distributed to the water distribution network 3 at the same time. I have.

On the other hand, the distribution flow rate sharing control device 4 between the distribution stations
Are a demand forecasting unit 41, a water distribution sharing plan unit 42, a distribution plan correction unit 43, an A distribution plant water distribution pump control unit 44,
And a water distribution pump control unit 45.

Here, the demand forecasting section 41 calculates a demand forecast value of a distribution flow rate to be distributed to the distribution pipe network 3 based on a forecast value 5 of weather data (weather, precipitation probability, etc.) which influences the distribution flow rate. 6 is predicted.

Further, the water distribution sharing plan unit 42 includes a demand forecast value 6 of the distribution flow rate predicted by the demand prediction unit 41 and a sharing ratio 7 representing a distribution ratio of the distribution flow rate according to the capacity of each of the water distribution stations 1 and 2. Based on the above, the A distribution station sharing plan value 8 and the B distribution station sharing plan value 9 to be distributed to the water distribution stations 1 and 2 are determined so that the demand forecast value 6 becomes the sharing ratio 7. .

Further, the sharing plan correction unit 43 includes the A distribution plant sharing plan values 8 and B determined by the water distribution sharing planning unit 42.
The distribution plan value 9 (or the distribution plan value 9 (or 1) of the other distribution plant 2 (or 1) according to the distribution distribution plan value 9 and the distribution flow actual value 10 (or 11) of the one distribution plant 1 (or 2) one control cycle before. Or 8) based on the pump start flow 12 and the pump stop flow 13 for compensating for (8), the target value (14) and the (B) distribution water flow target for the water distribution stations 1 and 2 to be distributed. The target value 15 is determined.

On the other hand, the distribution pump control unit 44 of the water distribution station A
The distribution pump P1 of the A distribution plant 1 is controlled for each control cycle based on the distribution flow target value 14 of the A distribution plant 1 determined by the sharing plan correction unit 43, and the amount of fluid that is in the distribution target flow value 14 is controlled. Is supplied to the distribution network 3.

Further, the water distribution pump control unit 45 of the B distribution station
The distribution pump P1 of the B distribution plant 2 is controlled for each control cycle based on the distribution flow target value 15 of the B distribution plant 2 determined by the sharing plan correction unit 43, and the amount of fluid corresponding to the distribution flow target value 15 is Is supplied to the distribution network 3.

Here, if the actual value 10 of the distribution flow rate of the A distribution station before one control cycle of the A distribution plant 1 exceeds the pump activation flow rate 12, the pump start flow rate 12 will be the B distribution of the control cycle currently being operated. The target water distribution flow rate target value 15 is set so as to be the flow rate at which water can be distributed when one additional water distribution pump is operated to the number of operating water distribution pumps in the B water distribution station 2 one control cycle before.

Also, the pump stop flow rate 13 is determined by
If the actual value 10 of the distribution flow rate at the water distribution station A before the control cycle is less than the pump stop flow 13, the target value 15 of the distribution flow rate at the water distribution station B in the control cycle to be currently operated is changed to the water distribution value B before the control cycle. It is set so that the flow rate at which water can be distributed when one of the water distribution pumps is stopped from the number of operating water distribution pumps at the station 2 is set. Next, the operation of the distribution flow rate sharing control device 4 between the water distribution stations of the present embodiment configured as described above will be described.

In FIG. 1, first, a demand forecasting section 41 has to distribute water to the water distribution network 3 based on a forecast value 5 of weather data, such as weather and precipitation probability, which influences the water flow. Is predicted.

Next, the water distribution plan planning unit 42 uses the demand forecast value 6 predicted by the demand prediction unit 41 and the preset distribution ratio 7 to calculate the distribution plan A distribution plan value 8 and the distribution plan B for water distribution station B. A sharing plan value 9 is determined. In this case, the sharing ratio is 7
Is set as the ratio of the total of the distribution plan sharing values 8 for the A distribution plant 8 and the total of the planning values 9 for the distribution distribution plant B, and is set according to the capacity ratio of the facilities of each of the distribution plants 1 and 2 such as water intake sources.

Next, in the sharing plan correction unit 43, the actual value 10 of the distribution flow rate of the water distribution station A exceeds the flow rate 12 of the pump start,
If the distribution ratio of water distribution is biased toward the distribution plant 1, one additional water distribution pump P1 of the distribution plant B 2 is started and the distribution plan value 9 of the distribution plant B and the distribution plan value 8 of the distribution plant A 8 are corrected. The target water distribution flow target value 15 and the target water distribution flow target water distribution value A 14 are determined.

Further, in the sharing plan correction unit 43, the actual value 10 of the distribution flow rate at the water distribution station A falls below the pump stop flow rate 13,
If the water distribution share is biased toward the B distribution station 2, one water distribution pump P1 of the B distribution station 2 is stopped, and the B distribution plan sharing value 9 and the A distribution plant sharing value 8 are corrected. The target water supply flow rate 15 and the target water supply flow rate A distribution station 14 are determined.

On the other hand, if the actual value 10 of the distribution flow rate at the water distribution station A is between the pump start flow rate 12 and the pump stop flow rate 13, the sharing plan correction unit 43 continues the operation of the water distribution pump one control cycle before. In addition, the flow rate that can be distributed by the number of water distribution pumps one control cycle before is determined as the target value 14 for the distribution flow rate at the water distribution station A and the target value 15 for the distribution flow rate at the water distribution station B.

However, if, by the present control cycle, the actual value 10 of the distribution flow rate at the A water distribution station is between the pump start flow rate 12 and the pump stop flow rate 13, the planned distribution value 8 of the water distribution area of the A water distribution station and the distribution value of the water distribution area B will be shared. The planned value 9 is determined as it is as the water distribution target value 14 for the A distribution station and the distribution flow target value 15 for the B distribution plant.

FIGS. 2 and 3 show the allocation plan correction unit 4.
FIG. 3 is a flowchart illustrating an example of a method of determining a target water supply flow rate A and a target water supply flow rate B for each control cycle in FIG. 2 and 3, first, in step ST1, the A distribution plant sharing plan value and the B distribution plant sharing planning value of the current control cycle are read.

Next, in step ST2, if the actual value 10 of the water distribution flow rate at the water distribution station A before the control cycle exceeds the pump starting flow rate 12, the process proceeds to step ST3. Step ST
In 3, the flow rate at which water can be distributed when one pump is additionally activated to the number of pumps operated in the B water distribution station 2 one control cycle before is set as the B water distribution water distribution flow target value 15.

Next, in step ST2, if the actual value 10 of the water distribution flow rate at the water distribution station A before the control cycle does not exceed the pump starting flow rate 12, the process proceeds to step ST4. In step ST4, the water distribution flow actual value 1 of the water distribution station A before one control cycle
If 0 is lower than the pump stop flow rate 13, step S
Move to T5. In step ST5, the flow rate at which water can be distributed when one pump is stopped from the number of pumps operating in the B water distribution station 2 one control cycle before is set as the water distribution flow target value 15 for the B water distribution station.

Next, in step ST4, if the actual value 10 of the distribution flow rate at the water distribution station A before the control cycle is not lower than the pump stop flow rate 13, the process proceeds to step ST6. In step ST6, if the actual value 10 of the water distribution flow rate at the water distribution station A before the control cycle is between the pump start flow rate 12 and the pump stop flow rate 13, the process proceeds to step ST7. Step ST7
In this case, the flow rate at which water can be distributed when the number of pumps is the same as the number of pumps operated in the B water distribution station 2 one control cycle before is set as the water distribution flow target value 15 for the B water distribution plant.

Next, in step ST6, if the actual value 10 of the distribution flow rate at the water distribution station A before the control cycle is not between the pump start flow rate 12 and the pump stop flow rate 13, the process proceeds to step ST8. In step ST8, if the target water supply flow rate B of the B distribution station 15 has not been calculated in the processing of step ST2 or step ST4 by the current control cycle, the process proceeds to step ST9. In step ST9,
The B distribution station sharing plan value 9 is directly used as the B distribution plant distribution flow target value 15.

Next, in step ST8, if the target water supply flow rate B of the water distribution station B has been calculated in the processing of step ST2 or step ST4 by the current control cycle, the process proceeds to step ST10. In step ST10, a value obtained by subtracting the target water supply flow rate B 15 from the predicted demand value 6 is set as the target water supply flow rate A 14.

That is, in the allotment plan correction unit 43, the water distribution actual value 10 of the water distribution station A exceeds the pump starting flow rate 12
If the water distribution ratio is biased toward the water distribution plant 7, one additional water distribution pump of the water distribution plant B 2 is started, and the planned distribution value 9 of the distribution plant B and the distribution plan 8 of the distribution plant A are corrected. The target water supply flow rate 15 and the target water supply flow rate A distribution station 14 are determined.

Further, in the sharing plan correction section 43, the actual value 10 of the distribution flow rate of the water distribution station A falls below the flow rate 13 of the pump stop,
If the water distribution ratio is biased toward the B distribution station 8, one of the distribution pumps of the B distribution plant 8 is stopped, and B corrects the distribution plan distribution value 9 and the distribution distribution plan value 8 for the A distribution plant, and B distributes the water distribution plan. The distribution water flow target value 15 and the distribution water distribution flow target value A are determined.

Furthermore, if the actual distribution water distribution value 10 of the A water distribution station is between the pump start flow 12 and the pump stop flow 13, the division plan correction unit 43 continues the operation of the water distribution pump one control cycle before. In addition, the flow rate that can be distributed by the number of water distribution pumps before one control cycle is equal to the water distribution target water flow target value A 14 and B
It is determined as the target value 15 of the water distribution flow rate.

However, by the present control cycle, if the actual value 10 of the distribution flow rate at the water distribution station A is between the flow rate 12 at which the pump is started and the flow rate 13 at which the pump is stopped, the planned distribution values 8 of the water distribution area at the water distribution station A and B
The distribution plant sharing plan value 9 is determined as it is as the A distribution plant distribution flow target value 14 and the B distribution plant distribution flow target value 15.

Next, the water distribution pump control unit 44 of the A distribution station 1 uses the target value 14 of the distribution flow rate of the water distribution station A determined by the distribution plan correction unit 43.
1 is controlled. At the same time, the B distribution station water distribution pump control unit 45 determines the B
The water distribution pump P1 of the B water distribution station 2 is controlled using the water distribution target flow rate target value 15.

As described above, the distribution value actual value 1 of the water distribution station A
By determining the target value 14 for the distribution flow rate of the A distribution station and the target value 15 for the distribution flow rate of the B distribution station according to the value of 0, the distribution ratio of the distribution from the A distribution station 1 and the B distribution station 2 is determined by The actual distribution flow values 10 and 11 at stations 1 and 2 are
Even if it is different from the allocation plan values 8 and 9, the water distribution system will not lean to one of the water distribution stations.
And good operation of the B water distribution plant 2 can be realized.

Further, the target value 14 for the distribution flow rate of the water distribution station A and the target value 15 for the distribution flow rate of the water distribution station B determined by the distribution plan correction unit 43 are combined with the distribution plan value 8 of the water distribution station A and the distribution plan B of the water distribution station over the entire control cycle. If the value becomes equal to 9, the water distribution ratio becomes close to the distribution ratio 7 set by the water distribution plan unit 42.

Next, in the above, based on the demand forecast value 6 forecasted by the demand forecasting section 41 and the preset sharing ratio, the water distribution sharing plan section 42 executes
The distribution plan share values 8 and 9 to be distributed are determined, and when the actual demand value differs from the predicted demand value 6, the distribution plan correction unit 43 determines the distribution plant distribution flow target values 14 and 15. A specific example will be described. An example will be described in which the actual demand value is two control cycles earlier than the demand forecast value 6, and two control cycles later than the demand forecast value. At this time, the sharing ratio is 7 and the pump startup flow rate is 1
2, pump stop flow 13, respectively 1.3,200 0
[M ³ / h] and 500 [m ³ / h].

The demand forecast value 6 in this case is forecasted, for example, as shown in FIG. FIG. 4B shows the result when the actual demand value is earlier by two control cycles. FIG. 4C shows the result when the actual demand value is delayed by two control cycles.

In this example, the operation results for 24 control cycles are shown. Further, in this example, when the demand is small at night, the B water distribution plant 2 in FIG. 1 is configured to stop all the water distribution pumps P1 and operate only the A water distribution plant 1.

In FIG. 4 (b), at time 4 the distribution flow rate actual value 10 at the water distribution station A exceeds the pump starting flow rate 12, so that the control period of the water distribution station B in FIG. The water distribution pump P1 of the B water distribution station 2 has been activated soon. Also, in FIG. 4B, the B distribution station distribution flow target value 15 is shown with respect to the actual demand value. This is a value obtained by subtracting the target value 15.

On the other hand, in FIG.
Since the actual value 10 of the distribution flow rate of the water distribution station exceeded the flow rate 12 of the pump activation, it is 2 times larger than the planned value 9 of the distribution area B in FIG.
Later in the control cycle, the water distribution pump P1 of the B water distribution station 2 is activated. Also, in FIG. 4C, the B distribution station distribution flow target value 15 is shown with respect to the actual demand value. This is a value obtained by subtracting the target value 15.

As shown in FIG. 4 (b) and FIG. 4 (c), even when the actual demand value and the predicted demand value 6 are different from each other, according to the value of the water distribution flow actual value 10 at the water distribution station A. The B distribution station sharing plan value 9 is corrected, and the B distribution station distribution flow target value 15
By operating each of the water distribution stations 1 and 2 using the method, it is possible to prevent the distribution of water distribution from being uneven.

As described above, the pump start flow rate 12 and the pump stop flow rate 13 indicating the start timing and the stop timing of the water distribution pump P1 in each of the water distribution stations 1 and 2 are used.
According to the difference between the actual demand value and the predicted demand value 6, the distribution plant sharing plan values 8 and 9 are corrected, and by operating each of the distribution plants 1 and 2, the actual demand value and the predicted demand value 6 are compared. Even if there is a time difference between the water distribution stations, the water distribution stations 1 and 2 can be controlled so that the distribution of the water distribution is not offset.

As described above, in this embodiment, the distribution of the flow rate in the water distribution system in which the purified water is distributed from the two water distribution stations 1 and 2 provided with a plurality of water distribution pumps P1 to the same water distribution network 3 is shared. The distribution flow rate sharing control device to control
A demand forecasting unit 41 for forecasting a demand forecast value 6 of a distribution flow rate to be distributed to the distribution pipe network 3 based on a forecast value 5 of weather data (weather, precipitation probability, etc.) which influences a distribution flow rate; Demand forecast value 6 of distribution flow rate predicted by unit 41
Based on the distribution ratio 7 representing the distribution ratio of the distribution flow rate according to the capacity of each of the water distribution stations 1 and 2, the demand forecast value 6 is distributed to each of the water distribution stations 1 and 2 so that the distribution ratio 7 is obtained. The water distribution sharing plan unit 42 that determines the A distribution plant sharing plan value 8 and the B distribution plant sharing plan value 9 to be determined, and the A distribution plant sharing plan value 8 and the B distribution plant sharing plan value determined by the water distribution sharing planning unit 42. 9 and the distribution plan value 9 (or 8) of the other water distribution plant 2 (or 1) is corrected according to the distribution water flow actual value 10 (or 11) of one water distribution plant 1 (or 2) one control cycle before. Based on the pump start flow 12 and the pump stop flow 13 for
The distribution plan correction unit 43 and the distribution plan correction unit 43, which determine the distribution flow target value 14 (A distribution plant) and the distribution flow target value 15 (B distribution plant) to which water is to be distributed in the water distribution stations 1 and 2, respectively. The distribution pump P1 of the A distribution plant 1 is controlled for each control cycle based on the distribution water flow target value 14 of the A distribution plant 1, and the amount of fluid meeting the distribution water flow target value 14 is supplied to the distribution network 3. The distribution pump control unit 44 controls the water distribution pump P1 of the B distribution plant 2 for each control cycle, based on the distribution pump control unit 44 for the distribution plant to be supplied and the distribution flow target value 15 of the distribution plant B determined by the sharing plan correction unit 43. And a water distribution pump control unit 45 for supplying water to the water distribution pipe network 3 with a fluid amount that meets the distribution water flow target value 15.

Accordingly, the distribution plan value 9 or 8 of the other water distribution plant 2 or 1 is corrected in accordance with the actual distribution flow value 10 or 11 of one water distribution plant 1 or 2, and the water distribution pump P1
Of the distribution flow rate of each distribution station 1
Even when 0 and 11 are different from the planned distribution points 8 and 9, the distribution ratio of distribution from the distribution stations 1 and 2 to the distribution pipe network 3 is such that the distribution ratio is biased to one of the distribution stations. And water supply stations 1 and 2 can be satisfactorily operated.

In this way, stable operation is performed regardless of individual differences between operators and changes in demand patterns, and the distribution stations 1 and 2 are used as they are by using the distribution plan sharing values 8 and 9 as they are conventionally. It is possible to reliably prevent the occurrence of a failure in the water supply distribution system due to the bias of the distribution flow rate between the two distribution stations, which is expected when the operation is performed. It should be noted that the present invention is not limited to the above-described embodiment, and can be similarly implemented in the following manner.

FIG. 5 is a diagram showing an example of an operation result when the actual demand value is extremely small. In such a case, even if the demand forecast value 6 as shown in FIG.
The water distribution stations 1 and 2 can be operated stably by the water distribution ratio according to the actual demand value.

Further, in the above embodiment, the demand forecast value 6 of the distribution flow rate to be distributed to the distribution pipe network 3 is determined based on the forecast value 5 of the weather data (weather, precipitation probability, etc.) which influences the distribution flow rate. The demand forecasting unit 41 for forecasting is not necessarily indispensable to the present invention. If the demand forecast value of the distribution flow rate is known in advance, the demand forecasting unit 4
1 can be omitted.

Further, in the above-described embodiment, the case where the present invention is applied to a water supply distribution system for distributing purified water from two distribution stations having a plurality of water distribution pumps P1 to the same distribution pipe network has been described. The present invention is not limited thereto, and the present invention can be similarly applied to other fluids such as gas, that is, to all distribution systems in which fluid is distributed from two fluid distribution sources having a distribution pump to the same fluid demand source. It is needless to say that the present invention can be applied to

[0059]

As described above, according to the present invention, a distribution flow distribution control device for controlling distribution flow distribution in a distribution system for distributing fluid from two fluid distribution sources having a distribution pump to a fluid demand source. In the above, based on the demand forecast value of the distribution flow rate and a preset sharing ratio representing a sharing ratio of the distribution flow rate according to the capacity of each of the fluid distribution sources, the demand prediction value is set to the sharing ratio. the a distribution allocation planning means for determining a share planned to be delivered in each fluid delivery source, on the basis of the distribution share planned sharing plan values of each fluid delivery source that is determined by means of a fluid delivery source of the one Pump starting flow with actual distribution flow value set in advance
Increase the share of the other fluid distribution source when the volume is exceeded
And the distribution flow rate of the one fluid distribution source.
When the actual value falls below the preset pump stop flow
So as to reduce the sharing plan value of the other fluid distribution source
Correction to the an allocation plan correction means for determining a delivery rate target value to be delivered in each fluid delivery source, each fluid on the basis of the delivery flow target value for each fluid delivery source that is determined by the allocation plan correction unit A distribution pump control means for controlling a distribution pump of a distribution source and supplying a fluid amount corresponding to the distribution flow rate target value to the fluid demand source; and, if necessary, an element deeply related to a variation in the distribution flow rate. And a demand forecasting means for forecasting a demand forecast value of a distribution flow rate to be supplied to the fluid demand source based on the forecast value. A highly reliable distribution flow rate control device between fluid distribution sources that can perform stable operation and prevent occurrence of a failure in the distribution system due to a bias in distribution flow between two fluid distribution sources is provided. so That.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an embodiment in which a distribution flow rate sharing control device between water distribution stations according to the present invention is applied to a water supply distribution system.

FIG. 2 is a flowchart for explaining processing contents of a sharing plan correction unit in the embodiment.

FIG. 3 is a flowchart for explaining processing contents of a sharing plan correction unit in the embodiment.

FIG. 4 is a diagram for explaining a sharing plan value and a distribution water flow target value in the embodiment.

FIG. 5 is a graph showing a distribution water flow target value showing another embodiment of the present invention.

FIG. 6 is a diagram showing an example of a result of driving by a conventional method.

FIG. 7 is a diagram showing an example of a result of driving by a conventional method.

FIG. 8 is a diagram showing an example of a result of driving by a conventional method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... A water distribution station, 2 ... B water distribution station, 3 ... water distribution network, 4 ... distribution flow rate distribution control device, 41 ... demand forecasting part, 42 ... water distribution sharing plan part, 43 ... partition plan correction part, 44 ... A water distribution Distribution pump control section, 45: Distribution pump control section for B distribution station, 5: Forecast value, 6: Demand forecast value, 7: Sharing ratio, 8: A distribution plant sharing plan value, 9: B distribution plant sharing plan value, 10: Actual value of distribution flow rate at A distribution station, 11: Actual value of distribution flow rate at B distribution station, 12: Pump start flow rate, 13: Pump flow rate, 14: Target value of distribution flow rate at A distribution station, 15: Target value of distribution flow rate at B distribution station Value, P1
... water distribution pump, P2 ... water supply pump.

Claims (3)

(57) [Claims] 1. A distribution flow sharing control device for controlling distribution flow rate distribution in a distribution system for distributing fluid from two fluid distribution sources having a distribution pump to a fluid demand source, comprising: a demand forecast value of the distribution flow rate; Based on a preset distribution ratio representing a distribution ratio of the distribution flow rate according to the capacity of each fluid distribution source, the distribution of each of the fluid distribution sources should be such that the demand forecast value becomes the distribution ratio. Distribution sharing planning means for determining a planned value; and pump activation in which the distribution flow actual value of the one fluid distribution source is set in advance based on the sharing planning value of each fluid distribution source determined by the distribution sharing planning means. When the flow rate is exceeded
To increase the share plan value of the other fluid distribution source.
Correct the delivery flow actual value of the one fluid distribution source beforehand.
When the flow rate of the other pump falls below the set pump stop flow rate,
A sharing plan correction unit that corrects the distribution plan value of the distribution source to decrease to determine a distribution flow target value to be distributed by each of the fluid distribution sources; and a fluid distribution source determined by the sharing plan correction unit. Distribution pump control means for controlling a distribution pump of each of the fluid distribution sources based on the distribution flow target value of the above, and supplying a fluid amount meeting the distribution flow target value to the fluid demand source. A distribution flow sharing control device between fluid distribution sources. 2. The distribution flow control device according to claim 1, wherein the distribution to be supplied to the fluid demand source is based on a predicted value of an element closely related to the fluctuation of the distribution flow rate. A distribution flow sharing control device between fluid distribution sources, characterized by adding a demand prediction means for predicting a flow demand prediction value. 3. The method according to claim 1, wherein the distribution plan correction means is configured to, when the actual distribution flow value of the one fluid distribution source is between the pump start flow rate and the pump stop flow rate, distribute the respective share plan values to the respective fluid distribution sources. If the actual value of the flow rate of the one fluid supply source deviates from between the pump start flow rate and the pump stop flow rate, the one fluid supply rate is determined. If the actual distribution flow rate value of the source exceeds the pump starting flow rate, a value obtained by adding the flow rate that can be distributed by one distribution pump of the other fluid distribution source to the distribution flow target value of the other fluid distribution source one control cycle ago. The distribution flow target value of the other fluid distribution source in the current control cycle is determined, and if the actual distribution flow value of the one fluid distribution source is lower than the pump stop flow, the distribution of one water distribution pump of the other fluid distribution source is performed. Allowable flow rate for one control cycle 3. The delivery flow target value of the other fluid supply source in the current control cycle, the value subtracted from the delivery flow target value of the other fluid supply source before the period is determined. Control device for distribution flow rate between fluid distribution sources.