JP2001342967A - Device and method for controlling flow rate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and a method for controlling a flow rate capable of stabilizing a system when anomaly occurs with flow regulating equipment such as pumps, valves, and gates installed in a water channel for transporting water between a plurality of pints. SOLUTION: When detecting the equipment anomaly by a trouble detection means 15, an equipment controller 1 obtains, by a calculation means 16, the target water level for each pipeline in an equilibrium obtained based on the controllable flow rate by sound equipment at a trouble-occurring point, from a flow control based on a previously prepared control schedule. Then, the water level is switched to the obtained level as a target to rapidly stabilize the water level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flow control device, and more particularly to a flow control device for controlling a flow rate of a water conduit by controlling a plurality of flow regulating devices such as pumps, valves, and gates provided in the water conduit. About.

[0002]

2. Description of the Related Art A headrace for the purpose of effectively utilizing water resources is a facility for connecting a plurality of rivers and lakes with an underground headrace to thereby transport water between a plurality of points. In this facility, flow control devices such as pumps, valves, and flow control gates are connected in the middle of an underground waterway or between rivers and lakes, and a predetermined amount of water is transported by operating these devices. FIG. 6 shows an example of the configuration of such a water conveyance system, in which two rivers 51, 52 and a lake 53 are connected by a pipeline, that is, an underground water conveyance channel 41, and the flow rate of water between the two is changed to two places. Pumping stations 71 and 72 and a diversion gate 81
And a control using a flow rate adjusting device of the valve 82. That is, the shafts 61 to 65, the underground waterway 41 connecting the lower ends of the shafts 61 to 65, and two pumps P
1, a first pumping station 71 having P2, a second pumping station 72 having two pumps P3 and P4, a diversion gate 81, a valve 82, each of the rivers 51 and 52 and a shaft 61-61.
Water level measuring instruments 91 to 98 for measuring water levels such as 65, pumping stations 71 and 72, flow rate measuring instruments (not shown) for measuring flow rates at the diverting gates 81 and valves 82, and pumps for the pumping stations 71 and 72. And a flow dividing gate 81, and a control device 8 of a flow control device for individually controlling a valve 82 via a network 9.

[0003] Each pumping station, a diversion gate 81 and a valve 82
Are installed at the positions shown in the figure. The water taken from the first river 51 via the pump at the pump station 71 is supplied to the underground headrace 41, and a part of the water is supplied via the shaft 62 and the pump at the pump station 72 to the second river 52. Transported and released. Further, the water in the underground water channel 41 is transported to the lake 53 via the shaft 64 and the valve 82, and via the branch gate 81 and the shaft 65. The control device 8 controls each flow rate adjusting device so as to match the final target flow rate of the water to be supplied to the river and the lake, and the final target flow rate of the water to be taken from the river 51 for transmitting the water. Further, each final target flow rate is changed in a predetermined time unit based on the operation plan of the water conveyance facility.

[0004] In such a water guide system, if the pump is suddenly stopped, the valve or the gate is suddenly closed, or the gate is rapidly opened, a water hammer or sudden pressure fluctuation may occur in the pipeline. is there. Such pressure fluctuations may cause damage to pipelines and backflow of water from the shaft, causing damage such as flooding. Therefore, in controlling the water conveyance equipment, it is necessary to avoid operating restrictions, that is, fluctuations in pressure and water level exceeding allowable values that guarantee safe operation. On the other hand, a water conveyance system as shown in FIG. 6 forms a multivariable control system in which a plurality of controlled variables are controlled by operating a plurality of devices. The control system changes the flow rate of the pipeline in accordance with an operation plan. Therefore, if the flow rate of the pipeline is simply adjusted to match the final target flow rate for each individual flow control device, changes in the flow rate and pressure resulting from the operation mutually affect each other, causing unexpected fluctuations. there is a possibility.

[0005] As a countermeasure against such pressure fluctuation, there is the following prior art. For example, JP-A-11-3058
No. 42 discloses a technique for creating a control schedule for each flow control device for changing the flow rate of each pipeline of a water conveyance facility from a current flow rate to a final target flow rate. In this technology, as shown in FIG. 7, based on operation rules relating to the operation of the flow rate adjusting device stored in advance,
From the current flow rate to the final target flow rate, a draft of a control schedule composed of the manipulated variables for the flow control device at each time is created (step 300), and the pressure and water level expected when this control schedule is executed are prepared. The amount of fluctuation is evaluated by fluid analysis simulation or the like (step 301). If the fluctuation of the pressure or the water level is not within the range of the operation constraint, the control schedule is corrected using a meta-rule regarding a method of correcting the control schedule to suppress the fluctuation. (Step 302) This is repeated until a control schedule that satisfies the driving constraints is created (Step 301).
To 303), the control sequence created last is executed (step 304). According to this conventional technique, a control schedule is drawn up in advance, and it is evaluated whether or not the control schedule is safe. After it is confirmed that the control schedule is safe, the flow control device is operated. In addition, the flow rate of each pipeline can be changed to the final target flow rate without violating the operation restrictions as the whole water conveyance facility.

[0006]

The control schedule created by the above-mentioned prior art is created on the assumption that all the flow control devices and related measuring devices function properly. Therefore, even if the flow control device is operated, it is impossible to follow the flow target value.
For example, when a pump trip or the like occurs, if the control schedule created in advance is executed as it is, there is a possibility that the predicted values of the pressure fluctuation and the water level fluctuation in the headrace will not be within the predetermined ranges. Occurs. In addition, the control schedule created in advance is created for the multivariable control system. Even if the target flow rate for each flow control device at the time of occurrence of the abnormality is maintained as it is, There is a possibility that the predicted values of the pressure fluctuation and the water level fluctuation do not fall within the predetermined ranges. For example, a control schedule prepared in advance may be a control in which the target flow rate of another flow control device is set to be large or small in advance in order to suppress a decrease in the water level of a certain shaft which is expected to occur due to a change in the target flow rate. A schedule is created. If an abnormality occurs in the device at a point during the execution of such a control schedule, and it becomes practically impossible to execute the control schedule after that point, it is expected that the fluctuation of the water level and the like will increase. Further, since the control target after the time when the abnormality occurs is not determined, there is a possibility that the water conveyance facility does not converge to a stable steady state.

Further, in order to create a control schedule according to the conventional technique, detailed prediction and evaluation of pressure fluctuations and water level fluctuations in the headrace are required. In addition, pressure fluctuations and water level fluctuations caused by the prepared control schedules are required. If it is not determined that the predicted value is within the predetermined range, it is necessary to repeat the process of adjusting the control schedule and evaluating again. These processes generally require a long calculation time. Therefore, when an abnormality occurs during the execution of the control schedule, it is substantially difficult to create a new control schedule starting from that time. As described above, according to the conventional technology, when an abnormality of a device not assumed in the creation of the schedule occurs during the execution of the control schedule created in advance, the fluctuation of the water level and the like becomes large, and the water conveyance equipment is constantly operated. There is a problem that the state cannot be controlled.

The present invention provides a flow control device capable of stabilizing a water level or the like quickly and converging a water conveyance facility to a steady state even if an abnormality occurs in equipment during execution of a control schedule prepared in advance. The purpose is to:

[0009]

SUMMARY OF THE INVENTION The present invention relates to a flow control device for controlling a flow control device provided in each of a plurality of pipelines constituting a water conveyance facility, wherein the flow control device to be controlled is provided. Abnormality detecting means for detecting the occurrence of abnormalities in the pipes, and, when an apparatus abnormality is detected by this means, the operation of normal equipment other than the abnormal equipment and the operation of each pipe which can stably converge as a whole of the water conveyance equipment. A target water level calculating means for calculating a water level as a target water level, a target flow rate calculating means for calculating a target flow rate of a flow control device for setting the water level of each pipeline to the calculated target water level, and an abnormality detecting means for generating an abnormality. Control target switching means for switching from a control target based on a normal control schedule to a control target determined by the target flow rate calculating means when the control flow is detected. To disclose.

Further, according to the present invention, in the above-mentioned flow control device, there is provided a system state quantity collecting / holding means for reading and holding data including at least the measured values of the water level of each part of the water conveyance equipment and the flow rate or flow velocity of each pipeline, The target water level calculating means refers to the data held by the system state quantity collecting / holding means, and uses a relational expression that is established between a head, a flow velocity, and a loss coefficient that is established in each pipeline of the water introduction facility, and uses the relational expression that is established. Calculating a target water level at which the flow rate stably converges.

Further, the present invention relates to a flow control device for controlling a flow control device provided in each of a plurality of pipelines constituting a water conveyance facility, wherein an abnormality of the flow control device to be controlled is generated. Abnormality detection means to detect, and beforehand determine the target water level of each pipeline that can stably converge as a whole water conduction equipment by operating only the other equipment with a part of the flow control equipment as abnormal, for each combination of abnormal equipment Target flow rate setting value storage means for holding, target water level setting means for reading from the target flow rate setting value storage means the target water level corresponding to a combination of abnormal equipment detected when the abnormality detection means has detected equipment abnormality, A target flow rate calculating means for calculating a target flow rate of the flow regulating device with the water level of the pipeline being the calculated target water level, and when the abnormality detecting means detects the occurrence of an abnormality. That the control target based on the normal control schedule and a control target switching means for switching the control target determined by the target flow rate calculation unit discloses a flow control device according to claim.

Further, according to the present invention, in the above-mentioned flow control device, the data of the target water level held in the target water level set value storage means is displayed, and the data is edited / input in response to a user's input. Disclosed is a flow rate control device characterized by including input / edit means capable of performing the control.

Further, the present invention relates to a method for controlling a flow control device provided in each of a plurality of pipelines constituting a water conveyance facility, the method comprising monitoring occurrence of an abnormality in a flow control device to be controlled, and generating an abnormality. If there is equipment, determine the water level of each pipeline that can converge stably as a whole as a whole by operating the normal equipment excluding that equipment as the target water level, and set the water level of each pipeline to this target water level. Disclosed is a flow control method, wherein a target flow rate of each flow control device is calculated, and each flow control device of the water guide facility is controlled using the target flow rate as a control target.

[0014]

Embodiments of the present invention will be described below in detail. FIG. 2 shows an example of the water conveyance equipment, which is the same as the water conveyance equipment shown in FIG. 6 except for the control system, and is an equipment for transporting water from the river 51 to each of the river 52 and the lake 53. . Flow control device 1a for controlling the pumps, valves 82, and diverting gates 81 of the pump stations 71, 72
1 to 1d of the present invention are connected to each other via the communication line 10. In addition, the flow control device 1a measures the water levels Ha and Hb of the river 51 and the shaft 61 with the water level measuring devices 91 and 9 respectively.
4, the flow control device 1b measures the water levels Hc and Hd of the river 52 and the shaft 62 from the water level measuring devices 92 and 95, and the flow control device 1c measures the water levels Hf and Hg of the shaft 64 and the lake 53 from the water level measuring devices 97 and 93. The flow control device 1d takes in the water levels Hg and Hi of the lake 53 and the shaft 65 from the water level measuring devices 93 and 98, respectively, and further takes in the flow rates of the respective parts (not shown) from the flowmeters, and the pump station 71 and the pump station 7 respectively.
2. Control the valve 82 and the diversion gate 81.

FIG. 1 is a block diagram showing a detailed configuration example of the flow control device 1 shown in FIG. 2, and the control devices 1a to 1 in FIG.
This corresponds to one of d. In FIG. 1, a flow control device 1
Are device operation amount calculating means 11, data communication means 12a to
12 c, control target switching means 13, flow system state quantity collection / storage means 14, abnormality detection means 15, target water level calculation means 16, and target flow rate calculation means 17. The details of the function of each of the units 11 to 17 will be described in detail later, but the flow rate control device 1 is easily realized by a computer including a CPU, a working memory, a communication interface, and a storage device. Is possible. That is, a program that realizes the function corresponding to each of the units 11 to 17 is created and stored in the storage device. Then, by executing this program at every predetermined control cycle, it can be used in actual water conveyance equipment.

The flow control device 1 includes a data communication unit 12
The above-mentioned water level, flow rate, etc. are taken from the corresponding measuring devices via c, and the flow rate adjusting devices 7 (pumps, valves, or gates) to be controlled are taken in to control the devices 7. I do. In addition, the flow control device 1
The flow control device 1 is also connected to the other flow control device 1 via the communication means 12b, and further creates a flow target value at each time of each flow control device 71, 72, 81, 82 based on the operation plan of the whole water guide device 4. Control schedule creation device 2
Are connected via the data communication means 12a to exchange data. These data communications are performed using a dedicated communication line 1.
Using 0, transmission and reception are performed at each predetermined cycle. The transfer of this data is performed by a general public line or
A computer network line using the Internet or a means using wireless may be used.

The control schedule creation device 2 controls the normal operation based on the operation plan of the entire water conveyance facility 4, that is, the flow target value Qab (t) at each time of each of the flow regulating devices 71, 72, 81 and 82. , Qdc (t),
Qfg (t) and Qig (t) are created. In the present embodiment, this control schedule is described in
It shall be created by the operation method of the water conveyance equipment described in 05584. According to this method, when changing the planned discharge amount of the water conveyance system to the river 52 and the lake 53 based on the operation plan, the final target flow rate determined in the operation plan from the current flow rate in each flow control device. , It is possible to obtain an optimal target flow rate change pattern up to, that is, a control schedule. Here, the optimal control schedule is water hammer, hunting,
Evaluation of the occurrence of transient phenomena such as surging, and the relationship between the amount of operation of each flow control device and time when it is determined that the predicted values of pressure fluctuations and water level fluctuations in the headrace are within a predetermined range. It is. However, in order to create such an optimal control schedule, as described above, detailed prediction and evaluation of pressure fluctuations and water level fluctuations in the headrace are required. If the predicted value of the water level fluctuation is not determined to be within the predetermined range, it is necessary to repeat the process of adjusting the control schedule and evaluating again. These processes generally require a long calculation time. However,
The operation plan of the water conveyance facility is created well before the time when the corresponding control schedule is executed. Therefore, there is no problem even if it takes time to create a control schedule based on the operation plan during normal operation.

If an abnormality occurs in the equipment during the execution of the control schedule, if the execution of the control schedule is continued, a problem such as a large change in the water level occurs as described above. For this reason, in the control device of FIG. 1, when an abnormality occurs, the water level and pressure of the water conveyance equipment are once stabilized to a steady state, and after that, the control schedule creation device 2 sets a control schedule for achieving the final target flow rate again. By creating and executing this, the water conveyance facilities can be operated safely.

FIG. 3 is a flowchart of a process in the device control device 1 having such a function. This process is executed at a predetermined control cycle predetermined in the device control device 1. In FIG. 3, first, at step 200, the system state quantity collection / storage means 14
2c, the state quantity of the plant to be controlled, that is, the flow measurement value corresponding to the flow control device to be controlled, the water level measurement value of a shaft and a river or a lake, which is adjusted by the flow control device to be controlled, and the control target The data indicating the operation state of the flow rate adjusting device is read. For example, the device control device 1 shown in FIG.
In the case of a, each discharge flow rate in the pumps P1 and P2,
The measured values of the water level Ha of the river 51 and the water level Hb of the shaft 61 and the data corresponding to the operating states of the pumps P1 and P2 are read. These data are for some reason pump P1,
Provide information to recognize when an unexpected pump trip occurs at P2. Further, the system state quantity collecting / storing means 14 reads the state quantity data from the system state quantity collecting / storing means 14 of the other equipment control device of the water conveyance facility 4 via the data communication means 12b. The above data is updated and held by the system state quantity collection / storage means 14 at each of the predetermined control cycles.

Next, at step 201, the abnormality detecting means 1
5 determines whether or not an abnormality has occurred in the device based on the data of the system state quantity held by the system state quantity collection / storage means 14. This makes a multifaceted decision on all the equipment of the water conveyance facility. For example, pump station 7
In the case of 1 or 72, it is determined whether or not a trip, which is one of the abnormalities, has occurred based on the data corresponding to the above-mentioned operating state. Further, the result at this time and the data of the state quantity collected and held from the control target plant 3 are transmitted to another flow control device via the data communication unit 12b.

Next, in step 202, step 201
If it is determined that no abnormality has occurred and it is determined that there is no abnormality, the control target switching means 13 outputs the flow target data output by the control schedule creation device 2 in step 203. Read and hold it. Then, in step 207, the equipment operation amount calculating means 11 adjusts the flow rate based on the deviation ΔQ between the flow target value held by the control target switching means 13 and the actually measured flow rate taken from the flow measuring equipment of the plant to be controlled. Calculate the operation amount for the device. For example, the flow control device 1a
In the case of, the rotational speed command value Nref of the pumps P1 and P2 is obtained as a manipulated variable by PI (proportional / integral) calculation, that is, based on the following equation.

(Equation 1) Here, Kp is a proportional gain, and Ki is an integral gain. The control in the case where no abnormality is detected by the equipment of the water conveyance facility as described above is to execute the control schedule created by the control schedule creation device 2 by a conventional method.

If the result of the determination in step 202 is that there is an abnormality in the equipment, in step 204, the target water level calculating means 17 calculates the target water level of the shaft of the plant to be controlled. The target water level of the shaft is set at the time of occurrence of the abnormality within a range that can be controlled by using a device other than the abnormal device, that is, a healthy device. Hereinafter, this processing will be described. First, FIG.
Is assumed to be in a steady state with the following distribution in the underground waterway 41.

(Equation 2) Friction loss of head in proportion to the square of flow velocity in each pipeline,
Since the valve / gate loss occurs, the water levels Hb, Hd, He, H of the shafts 61 to 65 corresponding to the flow rate distribution described above.
The following equations hold for f and Hi.

(Equation 3) Here, Fbd, Fdf, and Ffi are friction losses in the respective pipelines, Vbd, Vdf, and Vfi are flow velocities in the pipelines, and g is a gravitational acceleration (= 9.8 m / s ＾ 2). In addition, shaft 65
The following formula is established between the lake and the marshes 53.

(Equation 4) Here, Hg is the water level of the lake 53, FIG is the coefficient of friction in the pipe between the shaft 65 and the lake 53, and Vig is the flow velocity in the pipe.

(Equation 3) (Equation 4) The flow velocity V on the right-hand side is proportional to the flow rate Q of the pipe having the flow velocity, and the proportionality constant is known from the cross-sectional area of the pipe. Also, the water level Hg in (Equation 4) is
It can be determined based on the value obtained by the water level measuring device of the lake 53. The flow rate Q from the shaft 65 to the lake 53 in FIG.
ig is equal to the flow rate Qfi from the shaft 64 to the lake 53. Therefore, the right side of (Equation 3) and (Equation 4) indicates that if the flow rates Qbc, Qdf, and Qfi of (Equation 2) are determined, the flow rates Hbc and Qfi are determined.
Is given, the steady-state values Hb, H of the water level in each shaft
d, Hf, and Hi can be obtained from (Equation 3) and (Equation 4). On the other hand, the flow distributions Qbc, Qdf, Qf
i is related to the flow rate in each flow control device in the steady state by the following equation.

(Equation 5) However, Qab and Qdc are the flow rates of the pump stations 71 and 72, respectively, and Qfg is the flow rate of the valve 82. Therefore, since the right side of (Equation 5) is determined by the state of each flow control device, the flow rates Qbc, Qdf, and Qfi of (Equation 2) can be determined. For example, assuming that the pumps P3 and P4 of the pump station 72 have the same output and the pump P3 is stopped, the flow rate Qdc is set to half of the normal time, and the flow rate of (Expression 5) to (Expression 2) is obtained. In this way, the expected setting values of the water levels of the shafts 61, 62, 64, and 65 when the flow rates of the respective devices are maintained after the occurrence of the abnormality are obtained. In calculating the expected setting of the water level,
The target water level calculation means 16 refers to the state data of the plant and the constant data such as the friction coefficient of each pipeline held in the system state data collection / storage means 14. What is calculated is the target water level of the corresponding shaft, for example, the device control apparatus 1a in FIG. 2 calculates the target water level of the shaft 61.

It should be noted that the cross section of each shaft in the water conveyance system of the present embodiment is sufficiently larger than the cross section of the pipeline, that is, the cross section of the underground water race 41, and the loss factor due to the branch flow of the pipeline is sufficiently small. . Under this condition, even if (Equation 3) holds, no large error occurs. If these conditions do not hold, the target water level is calculated by using the hydraulic head level and flow velocity at the branch point between each shaft and the pipeline as variables, and using the equation of head balance established at each branch point. Is possible.

When the target water level of the shaft at the time of abnormality is calculated by the processing in step 204 described above, in step 205, the target flow rate calculating means 17 calculates the target water level and the measured water level obtained from the water level measuring device. Deviation (ΔH)
Is calculated based on the target flow rate Qref. In the case of the flow control device 1a, this calculation is obtained by the following equation using PID (proportional / integral / differential) calculation.

(Equation 6) Here, Kp 'is a proportional gain, Ki' is an integral gain, and K
d 'is a differential gain.

Next, at step 206, the control target switching means 13 reads and holds the target flow rate Qref at the time of occurrence of the abnormality obtained at step 205. Then, in the next step 207, the device operation amount is calculated and output to the flow rate adjusting device. Therefore, if the control device 1 of FIG. 1 is used for each of the flow control devices 1a to 1d of FIG. 2, when an abnormality occurs in the flow control device of the water conveyance equipment, each shaft is controlled to a value that can be controlled in that state. And swiftly stabilize, and the occurrence of water hammer, hunting, and the like when an abnormality occurs can be prevented. After the water level is stabilized in this way, it goes without saying that a schedule is created and executed by the control schedule creation device with the stable state as an initial state.

In the flowchart of FIG. 3,
When an abnormality of the device is detected, step 204 is executed for each control cycle.
The target water level is calculated in step (1), which may be performed only once after the abnormality is detected or once per predetermined number of times. In the calculation of the target water level to be processed in step 204, if a transient phenomenon due to the progression or reflection of the pressure wave due to the abnormality of the equipment can be expected, the correction of the target water level to consider this in advance is performed. It is also possible to do.

The water level measuring devices 94 to 98 of the shafts 61 to 65 in FIG. 2 can be used to directly measure the position of the water surface by float or ultrasonic waves, or to measure the flow rate of connected pumps, valves, gates, etc. It may be obtained indirectly by calculation from the relationship between the data such as the measured values of the above and the measured values of the water levels of the rivers and lakes connected to the other side of the device.

Next, another configuration example of the flow control device according to the present invention will be described. FIG. 4 is a block diagram showing the configuration. The configuration of the control device 1000 is such that the target water level calculation means 16 of FIG. 1 is replaced with a target water level setting means 1010, and a target water level set value storage means 1011 and a display / editing means 1012 are provided. Is the same as the configuration example of FIG. 1 except that is newly added. Hereinafter, in FIG. 4, the same reference numerals are used for those having the same functions as those in FIG. Further, in the following description, a description will be given focusing on portions different from FIG.

In FIG. 4, the target water level set value storage means 1 is shown.
Numeral 011 stores data of the water level set value of each shaft for each operation state of the flow control device. When the water conveyance equipment to be controlled has the configuration of FIG. 2, as shown in Table 1,
Each of the shafts 61, 6 in the case where all the pumps, that is, each of the pumps P1 to P4 is operating normally or not.
Water level set values Hb, H as control targets for 2, 63, 65
The data of d, Hf, and Hi are held.

[Table 1] In Table 1, ○ and X in the pump status column indicate P1, P
For each of the pumps 2, P3 and P4, it indicates whether the pump is operating normally or not. here,
Not operating normally means that it is in a stopped state,
Or, a state in which some abnormality such as a trip has occurred. Symbols Lb1 to Lb in water level set value column
14, Ld1 to Ld14, Lf1 to Lf14, Li1 to
Li4 are water levels Hb and H according to the pump state, respectively.
The set values of d, Hf, and Hi are shown. For example, no.
The data in the first row indicates that the set values of the water level when the pumps P2, P3, and P4 are operating and the pump P1 is not,
Lb1, Lb for Hb, Hd, Hf, Hi respectively
d1, Lf1, and Li1. The target water level set value storage unit 1011 holds such water level set value data for each shaft for all combinations of operating states of the pumps.

The data of the water level set value held in the target water level set value storage means 1011 is obtained and set in advance by analysis or the like. This can be determined, for example, by executing the method used in step 204 of the flowchart described with reference to FIG. 3 offline. Or,
It may be set based on the measured water level of each of the shafts 61 to 65 in the steady state corresponding to the operation state of each pump in Table 1.

Next, the display / editing device 1012 shown in FIG.
Maintenance staff who perform maintenance work on the water conveyance equipment, or
It has a function of displaying data held in the target water level set value storage means 1011 to staff such as an operator who performs monitoring, and a function of inputting and editing these data in response to input from the staff. The target flow rate setting means 10
10 reads the operation state data of all the pumps of the water conveyance equipment held in the system state quantity collection / storage means 14 and, based on this data, among the water level set values held in the target water level set value storage means 1011, Flow control equipment 7
The data to be controlled is read and held. For example,
When the present apparatus 1000 is used as the control device 1a in FIG. 2, the target flow rate setting means 1010 reads the data of Lbn (n = 1 to 14) shown in Table 1 as the value of the water level set value Hb. Where n is N in Table 1 according to the operating state of the pump.
o. It is.

FIG. 5 is a flowchart showing processing in control device 1000. The processing steps 200 to 203 and steps 205 to 207 shown in FIG.
And the same processing is executed except that processing step 204 in FIG. 3 is replaced with processing step 1204. In processing step 1204, processing step 20
If it is determined in step 2 that an abnormality has occurred in the flow control device of the water conveyance facility, the target water level setting means 1010 is operated based on the pump operating state data held in the system state quantity collecting / storing means 14. Target water level set value storage means 10
Referring to 11, the target water level is set.

As described above, if the flow control device having the configuration shown in FIG. 4 is used, the water level set value corresponding to the state of the pump is determined in advance.
By maintaining this, the water level set value as the new control target value at the time of switching the control target can be set easily and in a short time. In addition, since the water level set value according to the operation state of the pump can be set in advance offline, it is possible to use a sufficiently verified value as the set value after switching the control target. Further, the provision of the display / editing means 1012 allows the staff to easily confirm the data held in the target water level set value storage means 1011 and to set the water level in accordance with the change in the specifications of the equipment and the pipeline in the water conveyance facility. The value can be easily corrected.

[0035]

According to the present invention, even when an abnormality of a device that is not taken into account when creating a control schedule prepared in advance occurs, the abnormality of the device can be immediately detected and a usable healthy device can be detected. The target value of the water level, which can be converged by the operation, can be obtained instantaneously by a simple operation that does not require repeated calculations such as convergence calculation. As a result, immediately after the occurrence of the abnormality, it is possible to switch from the flow control according to the control schedule to the water level control for temporarily stabilizing the water conveyance equipment. Therefore, the unstable state of the headrace due to the occurrence of the abnormality can be quickly converged. If the equipment in which the abnormality occurred is restored or if there is a backup equipment, after the entire water conveyance system is stabilized, the state is set to the initial state and the final flow rate target value is set for each pipeline. A control schedule for changing the flow rate may be created again and executed.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of a flow control device according to the present invention.

FIG. 2 is a diagram illustrating an example of the entire configuration of a water guide facility.

FIG. 3 is a flowchart showing a process in the flow control device of FIG. 1;

FIG. 4 is a block diagram showing another configuration example of the flow control device according to the present invention.

FIG. 5 is a flowchart showing a process in the flow control device of FIG. 5;

FIG. 6 is a diagram showing a configuration of equipment in a conventional method of operating water conveyance equipment.

FIG. 7 is a flowchart illustrating an operation method of a conventional water guide facility.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a-1d Flow control device 2 Control schedule creation device 3 Controlled plant 4 Water introduction equipment 11 Equipment operation amount calculation means 12a-12c Data communication means 13 Control target switching means 14 System state quantity collection / storage means 15 Abnormality detection means 16 Target water level calculating means 17 Target flow rate calculating means 41 Underground waterway 51,52 River 53 Lake 61-65 Vertical shaft 71,72 Pumping station 81 Dividing gate 82 Valve 91-98 Water level measuring device 1000 Flow control device 1010 Target water level setting means 1011 Target Water level set value storage means 1012 Display / edit means

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G05D 9/12 G05D 9/12 B (72) Inventor Shiro Matsui 603, Kandamachi, Tsuchiura-shi, Ibaraki Pref. (72) Inventor Toshihiro Otsuka 603, Kandachi-cho, Tsuchiura-shi, Ibaraki F-term (Industrial Machinery Systems Division) 2D019 AA43 3H045 AA09 AA15 AA16 AA23 BA19 BA24 BA28 BA41 CA06 CA16 CA17 CA29 DA05 DA32 DA47 EA04 EA38 5H307 AA07 BB06 CC11 DD17 EE22 ES02 FF02 FF12 FF16 GG04 GG06 GG09 HH04 HH08 HH10 HH12 5H309 AA06 BB18 CC05 CC09 DD04 DD08 DD27 EE05 EE08 H05 GG17GG

Claims (5)

[Claims] 1. A flow control device for controlling a flow control device provided in each of a plurality of pipelines constituting a water conveyance facility, wherein the flow control device detects an abnormality of the flow control device to be controlled. A detection means, and a target for calculating, as a target water level, a water level of each pipeline capable of stably converging as a whole of the water conveyance equipment by operation of normal equipment other than the abnormal equipment when the equipment abnormality is detected by the means. A water level calculating means, a target flow rate calculating means for calculating a target flow rate of the flow control device with the water level of the pipeline being the calculated target water level, and a normal control schedule when the abnormality detecting means detects the occurrence of an abnormality. And a control target switching means for switching from a control target based on the control target to a control target determined by the target flow rate calculation means. 2. The flow rate control device according to claim 1, further comprising a system state quantity collection / holding unit that reads and holds data including at least the measured values of the water level of each section of the water conveyance facility and the flow rate or flow velocity of each pipeline. The target water level calculating means refers to the data held by the system state quantity collecting / holding means, and conducts water conveyance using a relational expression established between the head, the flow velocity, and the loss coefficient established in each pipeline of the water conveyance equipment. A flow control device, wherein the target water level at which the equipment stably converges is calculated. 3. A flow control device for controlling a flow control device provided in each of a plurality of pipelines constituting a water conveyance facility, wherein the flow control device detects an abnormality of the flow control device to be controlled. A target for determining and holding in advance a target water level of each pipe line that can stably converge as a whole of the water conveyance equipment by operating only the other device with the detection means and a part of the flow control device being abnormal, Flow rate set value storage means, target water level setting means for reading the target water level corresponding to the combination of abnormal equipment detected when the abnormality detection means detects an equipment abnormality from the target flow rate set value storage means, A target flow rate calculating means for calculating a target flow rate of the flow rate adjusting device for setting the water level to the calculated target water level; and a normal control routine when the abnormality detecting means detects the occurrence of an abnormality. Flow control device, characterized in the control target based on the Joule that and a control target switching means for switching the control target determined by the target flow rate calculation means. 4. The flow rate control device according to claim 3, wherein the target water level data stored in the target water level set value storage means is displayed, and the data is edited and input according to a user input. A flow control device comprising an input / editing means capable of performing the following. 5. A method for controlling a flow control device provided in each of a plurality of pipelines constituting a water conveyance facility, the method comprising monitoring occurrence of an abnormality in a flow control device to be controlled, and providing an abnormality occurrence device. Calculate the water level of each pipeline that can converge stably as a whole by operating the normal equipment except the equipment and the normal equipment as the target water level, and adjust each flow rate so that the water level of each pipeline becomes this target water level A flow rate control method, comprising calculating a target flow rate of equipment, and controlling each flow rate adjusting device of the water conveyance facility with the target flow rate as a control target.