WO2019043818A1

WO2019043818A1 - Simple water intake gate control system

Info

Publication number: WO2019043818A1
Application number: PCT/JP2017/031083
Authority: WO
Inventors: 哲司横山; 幸雄上野
Original assignee: 中国電力株式会社
Priority date: 2017-08-30
Filing date: 2017-08-30
Publication date: 2019-03-07
Also published as: JP6330978B1; JPWO2019043818A1

Abstract

Provided is a simple water intake gate control system that can shorten the duration of operating at minimum generator output. A simple water intake gate control system for using in a simple water intake gate 3 that is raised to a fully open position so that the water intake channel water level WL is the same as the river water level RL during normal operation and that takes in water for small scale hydroelectric power generation from a river 1 to a water intake channel 2, wherein the simple water intake gate control system is provided with a control unit 10 for raising the simple water intake gate 3 to the fully open position by repeatedly raising the gate by a fixed opening increment I under the condition that the water intake channel water level WL is not at a dangerous water level DL within a fixed time period T after the simple water intake gate 3 has been lowered to a fully closed position when the water intake channel water level WL has reached the dangerous water level DL due to rising water in the river 1.

Description

Simple intake gate control system

The present invention relates to a simplified water intake gate control system suitable for use in a simplified water intake gate for taking water for small-scale hydroelectric power generation from a river into a water intake channel.

In the small-scale hydroelectric power plant, as shown in FIG. 4, water for small-scale hydroelectric power is drawn from the river 1 to the intake channel 2 (the upper surface is open U-shaped in cross section and about 95.5 cm in height) Intake gate 3 is used to introduce water into the

Such a simple intake gate 3 automatically controls the intake amount because it is difficult to perform precise on-off control in real time from the viewpoint of basically difficulty in opening and closing control with small amount of intake and cost-effectiveness. The intake water control mechanism is not provided, and it is raised to a fully open position (a position where the simple intake gate 3 is completely opened as shown by a solid line in FIG. Water level) is the same as river level RL (water level of river 1).

However, if the intake water level WL reaches the dangerous water level DL (upper limit water level) as the river water level RL rises due to the increase of the river 1, the simple intake gate 3 is fully closed to prevent excessive water intake (see As shown by the broken line at 4, the automatic intake gate 3 is automatically lowered to a position where the simple intake gate 3 is completely closed) to operate at a generator lower limit output (for example, about 150 kW).

Therefore, the control unit 6 is provided in the small-scale hydroelectric power station, and when the dangerous water level detection signal _SD is input from the dangerous water level detection unit 7 provided in the intake channel 2, the control unit 6 performs simplified intake outputs full closing command signal S _C to instruct the mouth gate 3 so as to fully closes the gate driver 4, so that lowering automatically the simple intake gate 3 to the fully closed position by the gate driver 4.
Incidentally, the simple intake gate 3 is fully closed, the gate driver 4 stops the operation by the operation stop instruction signal S _S from the limit switch 8.

In addition, since the control unit 6 does not have a function to automatically return the simple intake gate 3 lowered to the fully closed position to the fully open position (the original operation position), the person in charge can visit the site once a month. When going out, check whether the simple intake gate 3 has fallen to the fully closed position, and if the simple intake gate 3 is lowered to the fully closed position, use the operation unit 5 (operation handle) to use the gate drive unit 4 To manually raise the simple intake gate 3 to the fully open position.

In the patent document 1 below, the present applicant operates the drive mechanism to fully close the intake gate when the intake water gate fully closed water level is detected by the dangerous water level detection device, and the control water level detection device A water intake gate control system is proposed that includes a control unit that operates the drive mechanism to open or close the intake gate by a desired amount when the intake gate opening movement level or the intake gate closing movement level is detected.

JP, 2013-96190, A

However, when the conventional simple intake gate 3 is lowered to the fully closed position, the person in charge manually raises it at the time of the monthly inspection and returns it to the fully open position. If it is lowered again to the position, there is a problem that the generator will be operated at the lower limit output for a maximum of one month until the next patrol.

An object of the present invention is to provide a simplified water intake gate control system capable of shortening the operation period at the generator lower limit output.

In the simple intake gate control system of the present invention, in normal operation, the intake water level (WL) is raised to the fully open position so that it is the same as the river level (RL), and the water for small scale hydroelectric power A simple intake gate control system for use in the simple intake gate (3) for taking in from the intake channel (2) to the intake channel (2), wherein the intake channel water level reaches the dangerous water level (DL) due to the increase of the river. Then, after lowering the simple intake gate to the fully closed position, the simple intake gate is cut at a constant opening degree (I) on condition that the intake water level has not reached the dangerous water level within a certain time (T). Control unit (10) for repeatedly moving up to the fully open position.
Here, a gate drive unit (4) for raising the simple intake gate to the fully open position and lowering it to the fully closed position, and provided in the intake channel, and the intake channel water level is the danger The control system further includes a dangerous water level detection unit (7) for detecting whether the water level has been reached, and the control unit detects the dangerous water level detection unit when the water intake water level has reached the dangerous water level. Then, the gate drive unit is instructed to lower the simple intake gate to the fully closed position, and when the simple intake gate is lowered to the fully closed position by the gate drive, the predetermined time is reached. Instructing the gate drive unit to repeatedly raise the simplified intake gate by the predetermined opening degree on condition that the water intake water level has not reached the dangerous water level.
When the dangerous water level detection unit detects that the intake water level has reached the dangerous water level, a dangerous water level detection signal (S _D ) is output to the control unit, and the control unit generates a dangerous water level detection unit from the dangerous water level detection unit. A first step (S11) for monitoring whether or not the dangerous water level detection signal has been input, and a fully closed instruction signal (S _C ) when the dangerous water level detection signal is input is output to the gate drive unit And the gate driver may lower the simplified intake gate to the fully closed position when the fully closed instruction signal is input.
After the control unit outputs the fully closed instruction signal to the gate driving unit, the control unit monitors whether or not the dangerous water level detection signal is input within the predetermined time, and the control unit detects the dangerous water level detection signal within the predetermined time. If the dangerous water level detection signal is still input, the third step (S13) of repeating monitoring whether the dangerous water level detection signal is still input within the next fixed time is executed. Good.
A gate-up instruction signal instructing the control unit to raise the simplified intake gate by the predetermined opening degree when the dangerous water level detection signal is not input within the predetermined time or the next fixed time. A fourth step (S14) of outputting (S _R ) to the gate driver may be performed.
A fifth step (S15) of monitoring whether the dangerous water level detection signal is not input within a predetermined time after the control unit outputs the gate raising instruction signal to the gate drive unit; The sixth step (S16) of checking whether or not the simple intake gate has been raised to the fully open position, and the simple intake gate is raised to the fully open position, unless the danger water level detection signal is input. Otherwise, a seventh step of repeating the operation from the fourth step may be performed.
The control unit may execute the operation from the third step by making the predetermined time, the next fixed time, and the subsequent fixed time the same.
The control unit may execute the operation from the third step by changing the predetermined time, the next predetermined time, and the subsequent fixed time.
A limit switch (8) for outputting an operation stop instruction signal (S _S ) to the gate drive unit and the control unit when it is detected that the simple intake gate has been lowered to the fully closed position. Good.
The operation of the third step may be executed when the control unit does not output the full close instruction signal to the gate drive unit but the operation stop instruction signal is input from the limit switch. .

The simple water intake gate control system of the present invention has the following effects.
(1) The simple intake gate lowered to the fully closed position can be raised at a certain opening interval on the condition that the water level does not reach the dangerous water level within a fixed time, so the next inspection can be simplified The operating period at the generator lower limit output can be shortened compared to leaving the intake gate fully closed.
(2) Since the operation period at the generator lower limit output can be shortened, it is possible to increase the one-year power generation amount in the small-scale hydroelectric power plant.

It is a figure for demonstrating the simple water intake gate control system by one Example of this invention. It is a flowchart for demonstrating the operation | movement of the control part 10 shown in FIG. It is a figure for demonstrating the modification of the simple water intake gate control system shown in FIG. It is a figure for demonstrating the problem of the conventional simple intake gate 3. FIG.

Repeat the above procedure by raising the simple intake gate, which has been lowered to the fully closed position, in constant opening increments under the condition that the intake water level has not reached the dangerous water level within a fixed time, until the fully opened position It was realized by raising it.

Hereinafter, an embodiment of the simplified water intake gate control system of the present invention will be described with reference to the drawings.
In the simplified intake gate control system of the present invention, when the simplified intake gate 3 is lowered to the fully closed position, the intake water level WL does not reach the dangerous water level DL within a predetermined time T (for example, 2 to 48 hours) If the intake water level WL does not reach the dangerous water level DL, the simple intake gate 3 is repeatedly raised by a constant opening degree I (for example, 0.5 cm) and automatically raised to the fully open position. It is characterized by

Therefore, a simple water inlet gate control system according to an embodiment of the present invention, as shown in FIG. 1, in place of the control unit 3 shown in FIG. 4 and outputs a fully closing instruction signal S _C to the gate driver 4 After that, it monitors whether or not the dangerous water level detection signal _SD is input from the dangerous water level detection unit 7 within the fixed time T, and the simple intake gate 3 is fixed unless the dangerous water level detection signal _SD is input. Repeat outputting the gate up indication signal S _R which instructs to increase in opening degree increments I to the gate driver 4, the control unit 10 for gradually raising the simple intake gate 3 to the fully open position (a predetermined time T Built-in timer for measuring).

Next, the operation of the control unit 10 will be described with reference to the flowchart shown in FIG.
In the following description, it is assumed that constant time T = 2 hours, constant opening degree I = 0.5 cm, and simple intake gate 3 can be raised by about 0.5 cm within one second.

During normal operation, the control unit 10 monitors whether the dangerous water level detection signal _SD is input from the dangerous water level detection unit 7 (step S11).

As shown in FIG. 1, when the intake water level WL reaches the dangerous water level DL along with the rise of the river water level RL due to the increase of the river 1, the dangerous water level detection signal _SD is inputted from the dangerous water level detection unit 7 control unit 10 outputs a fully closing instruction signal S _C to the gate driver 4 (step S12).
As a result, the simplified intake gate 3 is automatically lowered to the fully closed position by the gate drive unit 4. If simple water inlet gate 3 is fully closed, the gate driver 4 stops the operation by the operation stop instruction signal S _S from the limit switch 8.

Control unit 10, and outputs a full-close instruction signal S _C to the gate driver 4, it activates the internal timer, from 2 hours water hazard (fixed time T) in the detection signal S _D is dangerous water level detector 7 It is monitored whether it has been input (step S13).

At this time, if the intake water level WL has reached the dangerous water level DL without lowering the river water level RL even after two hours, the dangerous water level detection signal _SD remains input from the dangerous water level detection unit 7 some reason, the control unit 10, by restarting the after resetting the internal timer, the next 2 hours (total closing command signal S _C is 4 hours from the output of the gate driver 4) dangerous water level detected in the It is again monitored whether the signal _SD remains input from the dangerous water level detection unit 7 (step S13).

As a result, when the river level RL is lowered to full closing command signal S _C for 4 hours and outputs to the gate driver 4 (next 2 hours) in the Tosuiro water level WL is lower than the dangerous water level DL, dangerous water level Since the detection signal _SD is not input from the dangerous water level detection unit 7, the control unit 10 instructs the gate intake instructing signal S _R to raise the simple intake gate 3 by 0.5 cm (constant opening degree I). Are output to the gate driver 4 (step S14).
Thus, a simple intake gate 3 is raised automatically about 0.5cm from the fully closing command signal S _C is output to the gate driver 4 after four hours.

Control unit 10, and outputs the gate up instruction signal S _R to the gate driver 4, so restarted after resetting the built-in timer, the subsequent 2 hours (total closing command signal S _C is the gate driver 4 It is monitored whether or not the dangerous water level detection signal _SD is input from the dangerous water level detection unit 7 within 6 hours after the output (step S15).

As a result, if the dangerous water level detection signal _SD is not input from the dangerous water level detection unit 7 within six hours (two hours thereafter), the control unit 10 determines whether the simple intake gate 3 has been raised to the fully open position. Check whether or not (step S16).
Since the simple intake gate 3 at the time has not yet been raised to the fully open position, the control unit 10, the gate driver to the gate up indication signal S _R which instructs to increase the simple intake gate 3 as another 0.5cm It outputs to 4 (step S14).
Thus, a simple intake gate 3, the total closing command signal S _C is raised automatically as 1.0cm after lapse of 6 hours from the output to the gate driver 4.

After that, unless the dangerous water level detection signal _SD is input from the dangerous water level detection unit 7, the control unit 10 repeats the operations of steps S15 and S16 until the simple intake gate 3 is raised to the fully open position.

On the other hand, after raising the simple intake gate 3 halfway, when the river 1 rises and the river water level RL rises and the intake water level WL reaches the dangerous water level DL, the dangerous water level detection signal _SD indicates the dangerous water level detection unit 7 since inputted from the control unit 10, the full closing command signal S _C is output to the gate driver 4 (step S15, S12), lowering the simple intake gate 3 to the gate driver 4 to the fully closed position Let

Thereafter, the control unit 10 repeats the operations of steps S13 to S16.

As described above, in the simple intake gate control system of this embodiment, the intake channel is lowered to the fully closed position as long as the intake water level WL does not reach the dangerous water level DL while raising the simplified intake gate 3 to the fully open position. Since the simple intake gate 3 can be automatically raised by 0.5 cm every two hours, water for small-scale hydroelectric power generation can be gradually poured into the intake channel 2, so that the simple intake gate will be used until the next patrol. The operating period at the generator lower limit output can be shortened as compared with the case where the switch is completely closed.

In the above explanation, the fixed time T was set equal to 2 hours, but assuming that the river 1 rises again again while raising the simple intake gate 3 to the fully open position, for example, first at 48 hours, next at T2 is changed for 12 hours, then 6 hours → 4 hours → 2 hours fixed, etc., and the simple intake gate 3 is lowered again to the fully closed position while raising the simple intake gate 3 to the fully open position. It is possible to reduce the possibility of being

The control unit 10 is started an operation to raise the simple intake gate 3 and outputs a fully closing instruction signal S _C to the gate driver 4, a limit switch 8 an operation stop instruction signal S _S 3 also is inputted to the control unit 10, the control unit 10 and the operation stop instruction signal S _S is input may be started the operation to raise the simple intake gate 3.

Reference Signs List 1 river 2 intake channel 3 simple intake gate 4 gate drive unit 5

operation unit

6, 10 control unit 7 dangerous water level detection unit 8 limit switch T fixed time I fixed opening step DL dangerous water level RL river water level WL intake water level S _C Fully closed indication signal S _D dangerous water level detection signal S _R gate raising indication signal S _S operation stop indication signal S11 to S16 step

Claims

In normal operation, the intake water level (WL) is raised to the fully open position so that it is the same as the river water level (RL) and for taking water for small-scale hydroelectric power generation into the intake channel (2) from the river (1). A simple intake gate control system for use in the simple intake gate (3),
When the intake water level reaches the dangerous water level (DL) due to the increase of the river, the simple intake gate is lowered to the fully closed position, and then the water level of the intake water reaches the dangerous water level within a certain time (T) The control unit (10) is provided to repeatedly raise the simple intake gate by the constant opening degree (I) on the condition that there is no such condition and to raise it to the fully open position.
Simple water intake gate control system characterized by.
A gate drive unit (4) for raising the simplified intake gate to the fully open position or lowered to the fully closed position;
And a dangerous water level detection unit (7) provided in the intake water channel for detecting whether the water intake water level has reached the dangerous water level,
The control unit
When it is detected by the danger water level detection unit that the intake water level has reached the danger water level, the gate drive unit is instructed to lower the simple intake gate to the fully closed position;
When the simplified intake gate is lowered to the fully closed position by the gate drive unit, the simplified intake gate is opened on the condition that the water intake water level has not reached the dangerous water level within the fixed time. Repeating the instruction to the gate driver to go up in degrees,
The simplified water intake gate control system according to claim 1, characterized in that:
When the dangerous water level detection unit detects that the water intake water level has reached the dangerous water level, it outputs a dangerous water level detection signal (S D ) to the control unit.
The control unit
A first step (S11) of monitoring whether or not the dangerous water level detection signal is input from the dangerous water level detection unit;
Performing a second step (S12) of outputting a fully closed instruction signal (S C ) to the gate drive unit when the dangerous water level detection signal is input;
The gate drive unit lowers the simple intake gate to the fully closed position when the fully closed instruction signal is input.
The simplified water intake gate control system according to claim 2, characterized in that:
After the control unit outputs the fully closed instruction signal to the gate driving unit, the control unit monitors whether or not the dangerous water level detection signal is input within the predetermined time, and the control unit detects the dangerous water level detection signal within the predetermined time. If the dangerous water level detection signal remains input, the third step (S13) of repeating monitoring whether the dangerous water level detection signal remains input within the next fixed time is executed The simplified water intake gate control system according to claim 3, characterized in that:
A gate-up instruction signal instructing the control unit to raise the simplified intake gate by the predetermined opening degree when the dangerous water level detection signal is not input within the predetermined time or the next fixed time. and executes a fourth step of outputting (S R) to the gate driver (S14), according to claim 4 simple intake gate control system according.
The control unit
A fifth step (S15) of monitoring whether or not the dangerous water level detection signal is input within a predetermined time after the gate raising instruction signal is output to the gate driving unit;
A sixth step (S16) of checking whether the simplified intake gate has been raised to the fully open position, as long as the dangerous water level detection signal is not input;
A seventh step of repeating the operation from the fourth step if the simplified intake gate is not raised to the fully open position;
The simplified intake gate control system according to claim 5, characterized in that:
8. The simplified water intake gate according to claim 7, wherein the control unit executes the operation from the third step with the same predetermined time, the next fixed time, and the subsequent fixed time being the same. Control system.
8. The simplified water intake gate control according to claim 7, wherein the control unit executes the operation from the third step while changing the predetermined time, the next fixed time, and the subsequent fixed time. system.
It further comprises a limit switch (8) for outputting an operation stop instruction signal (S S ) to the gate drive unit and the control unit when it is detected that the simple intake gate has been lowered to the fully closed position. The simplified water intake gate control system according to any one of claims 4 to 8, characterized in that
The control unit executes the operation of the third step when the operation stop instruction signal is input from the limit switch, not after the full close instruction signal is output to the gate drive unit. The simplified water intake gate control system according to claim 9, wherein it is assumed.