JP2010275825A - Automatic control system for water intake gate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic control system for water intake gate, capable of acquiring a reference water level (reference quantity of water) without causing hunting when joining the water taken in from a plurality of intakes into a conduit. <P>SOLUTION: An opening of a water-intake gate 6 is controlled for an intake 4 of a dam provided with a dam water gauge 8 in such a way that the quantity of intake water, which is computed on the basis of the water level of the dam detected by the dam water gauge 8 and the opening of the water-intake gate 6 detected by a water-intake-gate opening meter 25, becomes a first target quantity of intake water. The opening of a water-intake gate 7 is controlled for another intake 5 in such a way that the difference between the quantity of flow in the conduit acquired from the water level of the conduit 1 detected by a conduit water gauge 9 and the computed quantity of the intake water of the intake 4 of the dam provided with the dam-water gauge 8 becomes a second target quantity of intake water. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention controls the opening of intake gates provided at each intake when introducing water from a plurality of intakes to a waterway provided to introduce water for hydropower generation into a hydroelectric power station. It is related with the intake gate automatic control system useful for doing.

  In order to obtain water to be used for hydroelectric power generation, water intakes are provided in rivers, ponds, lakes, etc., and water is introduced into the waterway, but in order to take water more efficiently, dams and dams are often provided. Each intake port is provided with a water intake gate that adjusts the amount of water intake, and the opening degree of the water intake gate is controlled by a water gate automatic control panel to perform appropriate water intake.

  Conventionally, such an intake gate is provided with one automatic control panel to control the opening degree with respect to one gate. For example, as shown in FIG. 7, two intakes 4, 5 are provided. In the case of conducting water from the water channel 1 to the water channel 1, the water channel level after the merge of the water channel 1 is detected by the water channel water level meter 9, and the water level information of the water channel 1 detected by the water channel water level meter 9 is collected. The water level is converted into a flow rate so as not to exceed the authorized maximum water intake based on the water level information of the water conduit by the respective automatic control panels 101 and 102. The opening degree of the intake gates 6 and 7 was controlled.

  For such intake gates, various control methods have been proposed in order to accurately drive the gate to a position corresponding to the target opening value (see Patent Documents 1 and 2).

Japanese Patent Laid-Open No. 2003-147751 JP 2006-4154 A

  However, each automatic control panel acquires water level information from the waterway level gauge and individually controls the corresponding intake gates so that the water level in the waterway becomes the reference water level. Since there is a time lag before water intake from the mouth reaches the water level gauge, even if control is performed to make the opening of the intake gate exactly match the target opening, intake from multiple intakes is not possible. When they merge in the water conduit, as shown in FIG. 8, there is a disadvantage that the water level (water flow rate) causes hunting.

  The present invention has been made in view of such circumstances, and an intake gate capable of obtaining a reference water level (reference water amount) without causing hunting when water taken from a plurality of intake ports is joined to a water conduit. The main challenge is to provide an automatic control system.

  In order to achieve the above object, an automatic intake gate control system according to the present invention includes a plurality of intakes for introducing water flowing through a river to a water conduit provided to introduce water for hydroelectric power generation into a hydroelectric power plant. Is a system for adjusting the water level of the water conduit by controlling the opening of the intake gate provided at each of the water intakes, and detects the dam water level for the dam provided with the water intake A dam water level meter, a water level meter for detecting the water level of the water conduit after the intake water from the plurality of water intakes are merged, a water intake gate opening meter for detecting the opening of each water intake gate, and A dam water level meter, a channel water level meter, and an intake gate automatic control panel for receiving at least detection signals from the intake gate opening meter and controlling the opening of each intake gate in an integrated manner. For the intake of the dam, the dam water level detected by the dam water level gauge and the intake gate opening meter for detecting the opening of the intake gate provided at the intake are The opening of the intake gate is controlled so that the intake amount calculated based on the opening becomes the first target intake amount, and for the other intakes, the guide detected by the waterway level gauge is used. The opening of the intake gate is controlled so that the difference between the water flow rate obtained from the water level of the water channel and the calculated water intake amount of the water intake of the dam provided with the dam water level gauge becomes the second target water intake amount. It is characterized by that.

  Therefore, the intake gate provided at the intake of the dam where the dam water level meter is installed is calculated based on the dam water level detected by the dam water level meter and the intake gate opening detected by the intake gate opening meter. The intake gate provided at the intake other than the intake of the dam where the dam water level meter is installed is controlled so that the intake water amount becomes the first target intake amount. Since the difference between the water flow rate obtained from the water level of the water channel and the calculated water intake amount of the dam intake port provided with the dam water level gauge is controlled to be the second target water intake amount, they interfere with each other. It becomes possible to control each intake gate by taking a control form that does not match. For this reason, it is possible to prevent hunting even when water is introduced from a plurality of water intakes.

  Here, as a more specific control mode of the intake gate provided at the intake port of the dam provided with the dam water level gauge, when the calculated intake amount is less than or equal to the first target intake amount, the fully open state is established. When the dam water level is equal to or higher than a predetermined value, full-closed control is performed, and when the calculated water intake amount is larger than the first target water intake amount or the dam water level is smaller than the predetermined value, water intake is performed. You may make it perform control which makes quantity constant.

  Further, as a more specific control mode of the intake gate provided in the intake port other than the intake port of the dam provided with the dam water level meter, a water channel obtained from the water level of the water conduit detected by the water channel water level meter When the difference between the flow rate and the calculated intake amount of the dam intake port provided with the dam water level meter is smaller than the second target intake amount, full open control is performed, and the difference is greater than the second target intake amount. In some cases, constant control may be performed to keep the water channel level constant.

  And in control of these intake gates, in order to prevent the hunting between controls, switching of each control is good to switch after the setting time progresses after conditions are satisfied.

  As described above, the intake gate automatic control system according to the present invention detects the dam water level detected by the dam water level meter and the intake gate opening meter for the dam intake port provided with the dam water level meter. The opening of the intake gate is controlled so that the amount of water intake calculated based on the opening of the intake gate is the first target water intake, and other intakes are detected by the waterway level gauge. The opening of the intake gate is adjusted so that the difference between the water flow rate obtained from the water level of the conducted water channel and the calculated water intake amount of the dam intake port provided with the dam water level gauge becomes the second target water intake amount. Since control is performed, it is possible to perform control that does not interfere with each other, and it is possible to prevent hunting of the water channel level (water channel flow rate) after being merged in the water conduit.

  As a result, each intake gate does not operate frequently, it is possible to reduce the burden on the equipment, and it is possible to lengthen the period of equipment replacement and maintenance, thereby reducing the cost required for these. It becomes possible.

  In addition, when controlling a plurality of intake gates, the opening of each intake gate is controlled by one automatic intake gate control panel, so an automatic control panel is not required for each intake gate and space is reduced. It becomes possible. In addition, since a single automatic control panel is used, the status of a plurality of gates can be monitored at the same place, and various data can be recorded together, so that the work efficiency can be improved.

FIG. 1 is a diagram showing an overall configuration example of an intake gate automatic control system according to the present invention. 2A and 2B are schematic configuration diagrams showing a water intake facility, in which FIG. 2A is a plan view thereof, and FIG. 2B is a cross-sectional view taken along line AA of FIG. FIG. 3 is a diagram showing a control configuration example of the intake gate automatic control system according to the present invention. FIG. 4 is a flowchart showing an example of a control operation of the intake gate provided at the intake port of the river A by the automatic intake gate control panel. FIG. 5 is a flowchart showing an example of control operation of the intake gate provided at the intake port of the river B by the automatic intake gate control panel. FIG. 6 is a characteristic diagram illustrating changes in the water level (water channel flow rate) of the water conduit when the intake gate automatic control system according to the present invention is used. FIG. 7 is a diagram showing an overall configuration of a conventional intake gate automatic control system. FIG. 8 is a characteristic diagram illustrating changes in the water channel level (water channel flow rate) of the water conduit when the conventional intake gate automatic control system is used.

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

  In FIG. 1, the whole structure of the intake gate automatic control system which concerns on this invention is shown. This automatic intake gate control system is configured to introduce intakes of first and second intake facilities 2 and 3 for introducing water flowing through a river to a water conduit 1 provided for introducing water for hydroelectric power generation into a hydroelectric power plant. (The first water intake port 4 and the second water intake port 5 are connected to each other (in this example, the first water intake port 4 and the second water intake port 5 are separated from each other by about 450 m and are connected to the water conduit 1). The water level of the water after the merging of the water introduced into the water conduit 1 by controlling the opening of the water intake gates (the first water intake gate 6 and the second water intake gate 7) provided in each of the water intake ports 4 and 5 The first intake facility 2 is provided with a dam water level meter 8 for detecting the water level of the dam, and the water conduit 1 is joined with water introduced from the respective intakes 4 and 5. A water level gauge 9 is provided to detect the water level after (in this example, about 50 mm downstream from the junction). The detection signals from the dam water level gauge 8 and the waterway water level gauge 9 are input to the automatic intake gate control panel 10 provided on the second intake facility side, and the opening of each intake gate 6, 7 is integrated. I try to control it automatically.

  More specifically, as shown in FIG. 2, the first water intake facility 2 is provided with a water intake dam 11 in the transverse direction of the flow path in order to dam the water of the river A. A sand discharge gate 12 is provided for discharging sand and gravel flowing from the upstream to the downstream side of the bank. In addition, a water intake 4 that leads to the water conduit 1 is installed on the side of the dike 11 through the water intake 13 and the amount of water intake is adjusted by controlling the opening of the water intake gate 6 provided in the water intake 4. Thus, water is introduced into the water guide channel 1.

  Reference numeral 15 denotes an inflow portion of the water intake 4 (in this example, the upper portion of the water intake floor 13) to prevent dust such as driftwood and fallen leaves flowing down the river from flowing into the water conduit 1. The screen 15 keeps the dust and prevents the inflow into the water conduit 1.

  In this example, the water conduit 1 communicates with the intake 4 from the upstream of the dam of the river A through the lower part of the river A, and the intake from the intake 4 is a second intake provided upstream. The water is taken from the river B taken in through the facility 3.

In the second intake facility 3, the intake 5 is installed in the intake dam 16 that crosses the river B, and the intake amount is adjusted by opening control of the intake gate 7 provided in the intake 5. The water is led to the water.
The intake gates 6 and 7 provided at the respective intake ports 4 and 5 can use sluice gates, roller gates, stony gates, etc., and the opening degree is electrically controlled by the intake gate automatic control panel 10 described later. Is done.

  In FIG. 3, a specific control configuration example of the present control system is shown. In the first water intake facility 2, the sand discharge gate machine side operation panel 21 and the water intake gate machine side operation panel 22 each have various data and A control signal is provided so as to be able to transmit and receive, and the sand removal gate machine side operation panel 21 and the intake gate machine side operation panel 22 are connected to an internal panel 23 provided with various display units and operation units. .

  The sand removal gate machine side operation panel 21 is an operation panel for driving and controlling the opening degree of the sand removal gate 12, and a detection signal from the sand removal gate opening degree meter 24 for detecting the opening degree of the sand removal gate 12 and the dam water level. A detection signal or the like from the dam water level gauge 8 is detected. The intake gate side operation panel 22 is an operation panel that drives and controls the opening of the first intake gate 6, and is detected from the intake gate opening meter 25 that detects the opening of the first intake gate 6. A signal, a detection signal from the water level meter 9 for detecting the water level on the downstream side of the junction of the water conduit 1 and the like are input.

  In the second intake facility 3, an automatic intake gate control panel 10 and an intake gate machine side operation panel 26 are provided so as to be able to transmit and receive various data and control signals to each other. The control panel 10 and the intake gate side operation panel 26 are connected to an internal panel 27 provided with various display units and operation units.

  The intake gate side operation panel 26 is an operation panel that drives and controls the opening degree of the second intake gate 7, and the intake gate automatic control panel 10 includes an intake gate that detects the opening degree of the second intake gate 7. A detection signal or the like from the opening meter 28 is input.

  The detected data from the sand removal gate opening meter 24 and the dam water level gauge 8 received by the sand removal gate machine side operation panel 21 is taken in through the intake gate machine side operation panel 22 and through the protectors 29 and 30. The detection data from the intake gate opening meter 25 and the channel water level meter 9 sent to the gate automatic control panel 10 and received by the intake gate machine side operation panel 22 is also automatically controlled via the protectors 29 and 30. It is sent to the board 10.

And the intake gate automatic control board 10 calculates the opening degree of each intake gate 6, 7 and the sand discharge gate 12 based on these inputted various data, and the control signal for obtaining the opening degree, The data is transmitted to the drainage gate machine side operation panel 21 via the protectors 30 and 29 and the intake gate machine side operation panel 22, and to the intake gate machine side operation panel 22 of the first intake facility 2. , Transmitted through the protectors 30 and 29, and transmitted directly to the intake gate side operation panel 26 of the second intake facility 3.
That is, various detection data are collected in the automatic intake gate control panel 10 provided in the second intake facility 3, where the opening of various gates is calculated and corresponding to the respective operation panels 21, 22, and 26. A control signal for controlling the gate is transmitted.

  4 and 5, an example of the control operation of the first intake gate 6 and the second intake gate 7 by the intake gate automatic control panel 10 is shown as a flowchart. Hereinafter, based on this flowchart, the intake gate of each intake facility is shown. A control operation example will be described.

First, the control of the first intake gate 6 provided at the intake port 4 of the river A by the intake gate automatic control panel 10 will be described. As shown in FIG. It is determined whether the intake gate 6 can be automatically controlled by satisfying the two conditions (1) to (4) (step S1).
(1) River A dam water level and waterway water level data is normal (2) Water intake gate opening data is normal (3) Water intake gate failure is not operating (4) Power supply power to water intake gate is turned on What

  In this determination, if it is determined that any of the conditions is not satisfied, the display section of “intake control impossible” on the touch panel of the in-house panel 23 is turned on to lock the automatic control of the intake gate 6 (step S2). On the other hand, when it is determined that all of the above conditions are satisfied, the display unit of “intake control impossible” on the touch panel is turned off and automatic control is turned on (step S3).

  When automatic control is turned on, the water intake gate automatic control panel 10 acquires the dam water level detected by the dam water level gauge 8 (step S4). Here, the dam water level by the dam water level gauge 8 is used by accumulating data at every sampling time and calculating an average value thereof. For example, an average value of 30 seconds may be used with a sampling time of 5 seconds and a data accumulation number of 7.

  And the amount of water intake from the river A is calculated based on the dam water level detected by the dam water level meter 8 and the gate opening degree of the intake gate 6 detected by the intake gate opening degree meter 25 (step S5). This amount of water intake is uniquely determined from the characteristic line specific to the dam if the dam water level and the gate opening of the intake gate are known.

Thereafter, the automatic intake gate control panel 10 determines the conditions at the start of automatic control (step S6). This determination is to determine whether the intake gate 6 is fully open, fully closed, or in any other state immediately after the automatic control is turned on. When it is determined that 6 is fully open, the process proceeds to step S7, and the water intake from the river A is equal to or less than the reference water intake (first target water intake, for example, 0.8 m ³ / s). It is determined whether or not.

If it is determined that the water intake from the river A is less than the standard water intake (0.8 m ³ / s), the fully open control (control to raise the intake gate to automatic fully open (20 cm)) is maintained. Then, as long as the water intake from the river A continues to be below the reference water intake (0.8 m ³ / s), the fully open control is continued (step S9). On the other hand, when it is determined that the intake amount of the river A is larger than the reference intake amount (0.8 m ³ / s), the intake amount in step S11 to be described later is made constant after the set time (60 seconds) has elapsed. The control shifts to (step S10).

In step S7, when it is determined that the intake amount from the river A is larger than the reference intake amount (0.8 m ³ / s), control for making the intake amount constant is performed (step S11).
This constant intake volume control is a control that adjusts the opening so that the intake volume is 0.8 m ³ / s of the target intake volume. Specifically, a four-point interpolation method is used from the dam water level and the target intake volume. Is used to calculate the target opening (MHK) and to set the current operation amount (sda) from the target opening and the current opening (SGK) according to the following equation (1).
sda = MGK-SGK (1)

  Thereafter, it is determined whether or not the dam water level has fluctuated (step S12). If it is determined that the dam water level has not fluctuated, the intake water constant control is maintained, and if it is determined that it has fluctuated. Then, it is determined whether the dam water level is rising or falling (step S13). And when it is determined that the dam water level is rising, it is determined whether or not the dam water level is 60 cm or higher, which is the dam flood water level (step S14), and the dam water level is higher than the dam flood water level (60cm). In order to prevent foreign matter such as driftwood from flowing into the water conduit 1, after the set time (60 seconds) has elapsed, the operation is shifted to the fully-closed control operation in step S 21 described later (step S 15). If the dam water level is less than the dam flood water level (60 cm), the control to keep the water intake amount in step S11 constant is continued (step S16).

  Moreover, when it is determined in step S13 that the dam water level is decreasing, it is determined whether or not the dam water level is 15 cm or less, which is the water intake resuming water level (step S17), and the dam water level is the water intake resuming water level. When it is determined that it is equal to or less than (15 cm), after the set time (60 seconds) has elapsed, switching to the fully open control operation of step S8 (step S18), and when the dam water level is higher than the intake water resumption water level (15 cm), The control of making the water intake amount constant in step S11 is continued (step S19).

In contrast to the above control, if it is determined in step S6 that the intake gate 6 is fully closed immediately after the start of the automatic control, the process proceeds to step S20, and the dam water level of the river A is the intake resumption water level (15 cm). ) And whether or not the intake water intake of the river B is less than or equal to the intake water from the river B at the start of the full opening operation of the river A (for example, 2 m ³ / s). When it is determined that the dam water level and the intake water amount of the river B satisfy this condition, the control is shifted to the fully open control after the step S8, and the dam water level of the river A and the intake water amount of the river B are determined. When it is determined that this condition is not satisfied, the process proceeds to step S21, and full closing control is performed to lower the intake gate 6 to full closing (0 cm).

After that, whether or not the dam water level is below the resumption water intake level (15 cm) and the intake water intake of the river B is below the intake water (2 m ³ / s) from the river B at the start of the full opening operation of the river A (Step S22), and when it is determined that the dam water level and the intake water intake amount of the river B do not satisfy this condition, the fully closed control is continued. On the other hand, when it is determined that the dam water level and the intake water amount of the river B satisfy this condition, the control is performed to make the intake amount constant in step S11 after the set time (60 seconds) has elapsed. Transition is made (step S23).

  In Step S6, if it is determined immediately after the automatic start that the intake gate is not fully opened or fully closed, the process proceeds to Step S24, where the dam water level is 60 cm or more, which is the dam flood water level. If it is determined that the dam water level is equal to or higher than the dam flood water level (60 cm), the process proceeds to the control after step S21, and the dam water level is less than the dam flood water level (60 cm). If it is determined, control after step S11 is performed.

Therefore, when the above control is summarized, selection of the operation method of automatic control is performed as follows.
1. When the intake gate is fully open If river A intake ≤ standard intake (0.8 m ³ / s), fully open operation control is selected, and river A intake> standard intake (0.8 m ³ / s) ), The intake water constant operation control is selected.
2. When the intake gate is fully closed When the dam water level ≤ intake resumption water level is set and the river B intake water intake ≤ river A water intake amount at the start of river A fully open operation, full open operation is selected The
3. When the intake gate is not fully open or fully closed If the dam water level is less than the flood water level, the constant intake operation is selected. If the dam water level is greater than or equal to the flood water level, the fully closed operation is selected.

In addition, switching of the operation method is performed as follows.
1. Switching from fully open operation to constant water intake operation If River A water intake> standard water intake (0.8 m ³ / s), the operation method is switched to constant water intake operation after the set time has elapsed.
2. Switching from constant intake water operation to fully open operation If A dam water level ≦ intake resumption water level set value (15 cm), the operation method is switched to fully open operation after the set time has continued.
3. Switching from constant intake water operation to fully closed operation If A dam water level ≧ flood water level set value (60 cm), the operation method is switched to fully closed operation after the set time continues.
4). Switching from fully closed operation to constant water intake operation If dam water level ≤ intake resumption water level setting and river B intake water intake ≤ river B water intake at the start of fully open operation of river A, after the set time continues, The operation method is switched to a constant water intake operation.

Therefore, according to the intake gate control described above, the amount of water intake calculated based on the dam water level and the opening of the intake gate detected by the intake gate opening meter 25 without considering the water level of the water conduit 1 is since the opening degree of the intake gates are controlled so that a target intake amount 0.8 m ³ / s, when the change in the water level of the water guide passage occurs also, intake as specified target intake quantity is obtained The opening of the gate is controlled.

Next, control of the intake gate 7 provided at the intake 5 of the river B by the intake gate automatic control panel 10 will be described.
First, the intake gate automatic control panel 10 determines whether or not the intake gate 7 can be automatically controlled by satisfying the following three conditions (1) to (3) (step S31).
(1) Normal pond water level and channel water level data is normal (2) Channel inlet gate opening data is normal (3) Channel inlet gate failure is not working

  In this determination, if it is determined that any of the conditions is not satisfied, the display unit of “intake control impossible” on the touch panel of the internal panel 27 is turned on to lock the automatic control of the intake gate 6 (step S32). On the other hand, when it is determined that all of the above conditions are satisfied, the display unit of “intake control impossible” on the touch panel is turned off and automatic control is turned on (step S33).

  When automatic control is turned on, the water intake gate automatic control panel 10 acquires the water level of the water conduit 1 detected by the water channel level gauge 9 (step S34). Here, the water level of the water channel by the water channel level gauge 9 is used by accumulating data every sampling time and calculating an average value thereof. For example, an average value of 30 seconds may be used with a sampling time of 5 seconds and a data accumulation number of 7.

  Then, the water channel flow rate downstream from the confluence of the water conduit 1 is calculated from the water channel water level detected by the water channel water level gauge 9, and this water channel flow rate and the water intake amount calculated in step S5 from the river A (river A The intake water intake amount from the river B is calculated as the water channel flow rate minus the intake amount of the river A (step S35).

Thereafter, it is determined whether or not the amount of water intake from the river B is smaller than the channel B flow rate (the second target water intake amount, for example, 3 m ³ / s) of the river B (step S36). If it is determined that the amount of incoming water is smaller than the reference flow rate of the river B channel, full opening control is performed to raise the water intake gate 7 to automatic full opening (140 cm) (step S37). This full open control continues until the intake water intake of river B is equal to or higher than the reference intake amount of river B (river B intake water intake ≧ river B waterway reference flow rate) (step S38). When the river B waterway reference flow rate is reached, the process proceeds to the waterway water level constant control described later after the set time (10 seconds) has elapsed (step S39).

If it is determined in step S36 that the intake water amount from river B is equal to or greater than the reference intake amount from river B (river B intake water amount ≧ river B waterway reference flow rate), the target intake water amount The water channel level constant control is performed so that is 3.0 m ³ / s (step S40). This constant water level control is performed until the intake water amount from the river B falls below the fully open transition flow rate (for example, 2.9 m ³ / s) (step S41), and the river B intake water intake amount <the full open transition flow rate. When it becomes, after setting time (for example, 60 seconds) progresses, it transfers to a full open control driving | operation (step S42).

Here, the control flow rate in the constant waterway level control in step S40 is, for example, the current control flow rate dQ [m2 / s], the waterway reference flow rate SQS [m2 / s], and the waterway water level flow rate SQ [m2 / s]. Then, it is calculated as dQ = K3 * (SQS−SQ).
Then, the operation amount da of the intake gate is calculated by the following equation.

  Therefore, to summarize the above control, if the river B intake water intake <the river B water channel reference flow rate, the fully open control is selected, and the river B intake water intake ≥ river B water channel is selected. If it is the reference flow rate, the constant water level control is selected.

In addition, switching of the operation method is performed as follows.
1. Switching from fully open operation to constant channel water level operation If the intake water volume of River B exceeds the reference channel flow rate of River B during the fully open operation, the operation method is switched to constant channel level operation after the set time has elapsed.
2. Switching from constant water level operation to full-open operation If the Yoshii River intake volume is less than the full-open transition flow rate during constant water level operation, the operation method is switched from constant water level operation to full-open operation after the set time has elapsed.

Therefore, according to the intake gate control described above, the difference between the water flow rate downstream from the confluence of the water conduit calculated from the water channel level detected by the water channel level gauge 9 and the water intake amount from the river A is the river B. And the opening of the intake gate 7 is controlled so that the intake water amount from the river B becomes 3 m ³ / s which is the reference water intake amount (second target water intake amount).

  For this reason, the intake gate 7 of the second intake port 5 is separated from the control of the intake gate 6 of the first intake port 4 so that the target intake amount from the river B can be obtained by a different control mode. The opening of the intake gate is controlled.

Therefore, the opening of the first intake gate 6 is controlled so that the amount of water intake calculated based on the dam water level and the opening of the intake gate 6 is 0.8 m ³ / s. obtained opening characteristics shown, also, a second water intake gate 7, the value obtained by subtracting the intake amount from the first intake gate from waterways flow obtained from waterways level of the water conduit, 3m ³ Since the opening degree is controlled so as to be equal to / s, the opening degree characteristic as shown by a one-dot chain line in FIG. 6 is obtained, and as a result, the water level of the water conduit 1 is indicated by a broken line that does not perform hunting. It becomes.

  Thus, in the above-described configuration, the intake gate automatic control panel 10 provided on the second intake facility side controls each intake gate in a centralized manner with different control forms. It becomes possible to suppress hunting of the water channel level (water channel flow rate). For this reason, there is no inconvenience that each intake gate is frequently operated without being stabilized, it becomes possible to reduce the burden on the equipment, and a plurality of intake gates can be controlled by one intake gate automatic control panel 10. In addition, it is possible to monitor the status of a plurality of intake gates at the same place, and it is not necessary to install an automatic control panel for each intake gate, which makes it possible to reduce costs and save space.

1 Waterway 4,5 Water intake (4: 1st water intake, 5: 2nd water intake)
6,7 Intake gate (6: 1st intake gate, 7: 2nd intake gate)
8 Dam water level meter 9 Waterway water level meter 10 Intake gate automatic control panel 25, 28 Intake gate opening meter

Claims (4)

A plurality of intakes for introducing water flowing through a river are connected to a waterway provided to introduce water for hydroelectric power generation into a hydropower station, and the opening of each water intake gate provided at each of the water intakes is controlled. In the automatic intake gate control system for adjusting the water level of the water conduit,
A dam water level meter for detecting a dam water level with respect to a dam having the water intake, a water level meter for detecting the water level of the water conduit after merging water from the plurality of water intakes, and each intake Receives at least detection signals from intake gate opening meters that detect the opening of the gates, dam water level meters, channel water level meters, and intake gate opening meters, and controls the opening of each intake gate. With automatic intake gate control panel,
For the intake of the dam where the dam water level meter is provided, detected by the intake gate opening meter that detects the dam water level detected by the dam water level meter and the opening of the intake gate provided at the intake. The opening of the intake gate is controlled so that the intake amount calculated based on the opening of the intake gate is the first target intake amount,
For other intakes, the water flow rate obtained from the water level of the water conduit detected by the water channel level meter and the calculated intake amount of the water intake of the dam where the dam water level meter is provided. An intake gate control system, wherein the opening of the intake gate is controlled so that the difference becomes a second target intake amount.   The intake gate provided at the intake port of the dam provided with the dam water level meter performs full opening control when the calculated intake amount is less than or equal to the first target intake amount, and the dam water level is greater than or equal to a predetermined value. If the calculated intake water volume is greater than the first target intake water volume or the dam water level is smaller than the predetermined value, the intake water volume is controlled to be constant. The intake gate control system according to claim 1, wherein   The intake gate provided at an intake other than the intake of the dam provided with the dam water level meter is provided with a water flow rate obtained from the water level of the water conduit detected by the water channel level meter and the dam water level meter. The fully open control is performed when the difference between the calculated intake amount of the intake of the dam is smaller than the second target intake amount, and the water channel level is made constant when the difference is equal to or greater than the second target intake amount. The intake gate control system according to claim 1, wherein constant control is performed.   5. The intake gate control system according to claim 3, wherein switching between each control of the intake gate is switched after a set time has elapsed after the condition is established.

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