JP2012057513A - Tank water level adjusting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tank water level adjusting device for a hydraulic power plant that generates electric power and effectively utilizes water even when a small amount of water flows into a tank.SOLUTION: An adjustment section 415 of the tank water level adjusting device 41 adjusts the amount of water to be supplied to a hydraulic turbine so as to correspond to the minimum output value of a power generator for a predetermined time when the water level of the tank acquired by an water level acquisition part 411 reaches a water start level, keeps the amount of water to be supplied to the hydraulic turbine to correspond to the minimum output value when a monitoring part 412 determines that the water level of the tank has not increased after the lapse of the predetermined time, causes an inflow amount calculation part 414 calculate the amount of water flowing into the tank and adjusts the amount of water to be supplied to the hydraulic turbine so as to be equalized with the inflow amount when the monitoring part 412 determines that the water level of the tank has increased after the lapse of the predetermined time.

Description

  The present invention relates to an aquarium water level adjusting device. Specifically, the present invention relates to a water tank water level adjusting device that adjusts the water level of a water tank that stores water that drives a water turbine of a hydroelectric generator.

  In a flow-in hydropower plant, for example, in a dry season, the amount of water flowing into the water tank that supplies water to the generator is less than that corresponding to the minimum power output. It may be below a certain no-load flow rate. In such a situation, in a conventional flow-type hydroelectric power plant, water is stored in the tank until the water level of the tank reaches the water activation start level without generating power. The power is generated at the maximum output due to high power. Therefore, in a conventional inflow type hydroelectric power plant, when the response water starting water level is reached, power generation is performed at the maximum output, so the water level in the water tank becomes the response water stop water level in a short time, and efficient power generation is achieved. I couldn't.

  In order to cope with such a problem, in Patent Document 1, the target output value at the start of power generation is set low, the generator is continuously operated, and the inflow amount to the water tank is equal to or less than the no-load flow rate. In this case, a method for stopping the start-up of the generator has been proposed.

JP-A-9-144645

  However, in the method described in Patent Document 1, even when the response water starting level is reached, the generator is not started when the inflow amount to the water tank is equal to or less than the no-load flow rate, and therefore the generator overflows from the water tank. In some cases, effective use of water could not be achieved. For example, in a drought period, since the amount of water flowing into the water tank is small, the state where the amount of water flowing into the water tank is equal to or less than the no-load flow rate continues for a long period of time, and the method described in Patent Document 1 However, there is a risk that effective use of water may not be achieved.

  An object of the present invention is to provide a water tank water level adjusting device for a hydroelectric power plant that can generate power even when the amount of inflow into the water tank is small and can effectively use water.

  The water tank water level adjusting device according to the present invention is a water tank water level adjusting device that adjusts the water level of a water tank that stores water that drives a water turbine of a hydroelectric generator, and from a water level meter provided in the water tank, the water level of the water tank A water level acquisition unit for acquiring water, a monitoring unit for monitoring fluctuations in the water level acquired by the water level acquisition unit, an adjustment unit for adjusting a supply amount of water stored in the water tank to the water turbine, and the water level An inflow amount calculation unit that calculates an inflow amount of water into the water tank in a unit time based on the fluctuation of the water level acquired by the acquisition unit and the supply amount, and the adjustment unit includes the water wheel When the supply of water is started, the supply amount is adjusted to a supply amount corresponding to the minimum output value of the hydroelectric generator over a fixed time, and the water level does not rise by the monitoring unit after the fixed time has elapsed. If it is determined that The supply amount is maintained at a supply amount corresponding to the minimum output value, and the inflow amount calculation unit is configured to calculate the inflow amount when the monitoring unit determines that the water level has risen after the fixed time has elapsed. The supply amount is adjusted to be equal to the inflow amount.

  Moreover, it is preferable that the said adjustment part starts supply of the water to the said water turbine, when the said water level acquired by the said water level acquisition part reaches a response start water level.

  Moreover, the said adjustment part WHEREIN: When it determines with the said water level not having risen by the said monitoring part after progress of the said fixed time, the water level of the said water tank acquired by the said water level acquisition part is below a water stop water level If the water supply stop water level is not less than or equal to the water stoppage water level, the supply amount is maintained at a supply amount corresponding to the minimum output value. Is preferably stopped.

  In addition, when the adjustment unit determines that the water level has risen after the fixed time has elapsed, the adjustment unit further determines whether the water level of the water tank is stable after the fixed time has elapsed, and the water tank When the water level is not stable, it is preferable to cause the inflow amount calculation unit to calculate the inflow amount and readjust the supply amount to be equal to the inflow amount.

  According to the present invention, power can be generated even when the amount of inflow into the water tank is small, and water can be used effectively.

It is a conceptual diagram of the hydroelectric power generation system to which the aquarium water level adjusting device according to the present embodiment is applied. It is a top view of the water tank part concerning this embodiment. It is a block diagram which shows the function structure of the water tank water level adjustment apparatus which concerns on this embodiment. It is a flowchart which shows the flow of the water level adjustment control process at the time of a drought by the aquarium water level adjustment apparatus which concerns on this embodiment. It is the figure (the 1) which shows the fluctuation | variation of the water level at the time of adjusting the water level of a water tank with the water tank water level adjustment apparatus which concerns on this embodiment, and a generator output. It is the figure (the 2) which shows the fluctuation | variation of the water level at the time of performing the water level adjustment of a water tank with the water tank water level adjustment apparatus which concerns on this embodiment, and a generator output. It is a figure which shows the fluctuation | variation of the water level at the time of adjusting the water level of a water tank with the conventional water tank water level adjustment apparatus, and a generator output.

Hereinafter, the present embodiment will be described with reference to the drawings.
FIG. 1 is a conceptual diagram of a hydroelectric power generation system 1 to which an aquarium water level adjusting device 41 according to this embodiment is applied. FIG. 2 is a plan view of a water tank portion according to the present embodiment.

  The hydroelectric power generation system 1 includes a water intake mechanism 2 that takes water from a river or the like, a power generation mechanism 3 that generates power using water taken by the water intake mechanism 2, and a control mechanism 4 that controls the water intake mechanism 2 and the power generation mechanism 3.

  The intake mechanism 2 includes a water tank 21, an overflow bank 22, a spillway 23, a water level gauge 24, a water control gate 25, a screen 26, a pressure iron pipe 27, a guide vane 28, an opening sensor 29, Is provided.

  The water tank 21 stores water derived from a river or the like for use in power generation. The water tank 21 is provided with an overflow bank 22, a water level gauge 24, a water control gate 25, and a screen 26.

  The overflow bank 22 is provided between the water tank 21 and the spillway 23, and the water that has excessively flowed into the water tank 21 is overflowed from the water tank 21 and supplied to the spillway 23. The spillway 23 is adjacent to the overflow bank 22 and guides the water supplied from the overflow bank 22 to a river or the like.

The water level gauge 24 measures the water level of the water tank 21 and outputs the measured water level to the water tank water level adjusting device 41 of the control mechanism 4.
The water control gate 25 is provided on the downstream side of the water tank 21, and when it is not necessary to supply water to the pressure iron pipe 27, the water turbine 31 or the like due to work or the like, water supply to the pressure iron pipe 27 or the water wheel 31 or the like is provided. Shut off.
The screen 26 is provided upstream from the water control gate 25 and removes dust such as driftwood and gravel.

The pressure iron pipe 27 is connected to the water control gate 25. The pressure iron pipe 27 is provided with a guide vane 28 on the side opposite to the water control gate 25. The pressure iron pipe 27 supplies the water supplied from the water tank 21 through the water control gate 25 to the water turbine 31 of the power generation mechanism 3 through the guide vane 28.
The guide vane 28 is opened and closed under the control of the control mechanism 4 described later, and adjusts the amount of water supplied from the pressure iron pipe 27 to the water turbine 31 of the power generation mechanism 3.
The opening degree sensor 29 measures the opening degree of the guide vane 28 and outputs the measured opening degree to the aquarium water level adjusting device 41 of the control mechanism 4.

The power generation mechanism 3 includes a water wheel 31 and a generator 32.
The water wheel 31 includes a water wheel shaft 311, and is connected to the generator 32 by the water wheel shaft 311. The water turbine 31 is driven by the water supplied from the water tank 21 through the pressure iron pipe 27 and the guide vane 28, and drives the generator 32 through the water wheel shaft 311.

  The generator 32 includes a turbine (not shown), and the turbine 32 is driven by the water turbine shaft 311 of the water turbine 31 to generate power. The power generator 32 outputs the amount of power generated by the power generator 32, that is, the output value, to the aquarium water level adjusting device 41 of the control mechanism 4 through an active power converter (not shown).

  The control mechanism 4 includes an aquarium water level adjustment device 41, a speed governor control device 42, and a hydraulic servo motor 43.

  The aquarium water level adjusting device 41 calculates the amount of water flowing into the aquarium 21 based on the opening degree of the guide vane 28 supplied from the opening degree sensor 29, and based on the water level of the aquarium 21 output from the water level gauge 24. Thus, the amount of water supplied to the water turbine 31 is calculated and output to the governor controller 42 as an open / close signal of the guide vane 28.

The functional configuration of the aquarium water level adjusting device 41 will be described with reference to FIG.
FIG. 3 is a block diagram showing a functional configuration of the aquarium water level adjusting device 41 according to the present embodiment.

  The aquarium water level adjustment device 41 includes a control unit configured by a CPU or the like. The control unit includes a water level acquisition unit 411, a monitoring unit 412, an output value acquisition unit 413, an inflow amount calculation unit 414, and an adjustment unit 415.

  The water level acquisition unit 411 acquires the water level of the water tank 21 from the water level gauge 24 provided in the water tank 21. Specifically, the water level gauge 24 sequentially outputs the water level of the water tank 21 to the water tank water level adjustment device 41, and the water level acquisition unit 411 acquires the water level of the water tank 21 output from the water level gauge 24. .

The monitoring unit 412 monitors fluctuations in the water level of the water tank 21 acquired by the water level acquisition unit 411. Specifically, the monitoring unit 412 monitors fluctuations in the water level of the water tank 21 acquired by the water level acquisition unit 411 and determines whether or not the water level of the water tank 21 has increased.
The output value acquisition unit 413 acquires the output value of the generator 32.

  The inflow amount calculation unit 414 is configured to supply water to the water tank 21 in a unit time based on the fluctuation of the water level of the water tank 21 acquired by the water level acquisition unit 411 and the supply amount of the water stored in the water tank 21 to the water turbine 31. Calculate the inflow amount. More specifically, based on the fluctuation of the water level of the water tank 21 acquired by the water level acquisition unit 411 and the area of the water tank 21, the amount of change of water in the unit time of the water tank 21 is calculated. The amount of water flowing into the water tank 21 per unit time is calculated by summing the amount supplied to the water tank.

The adjustment unit 415 adjusts the supply amount of water stored in the water tank 21 to the water turbine 31.
Specifically, the adjustment unit 415 performs a normal water level adjustment control process and a drought water level adjustment control process.

  The adjustment unit 415 performs the following process as the normal water level adjustment control process. That is, the adjustment unit 415 includes the amount of water flowing into the water tank 21 in the unit time calculated by the inflow amount calculation unit 414, the amount of water supplied to the water turbine 31, and the output value acquired by the output value acquisition unit 413. Based on the above, the supply amount is adjusted so that this supply amount becomes equal to the inflow amount within a range equal to or less than the supply amount corresponding to the maximum output value of the generator 32.

  Moreover, the adjustment part 415 performs the following processes as a drought water level adjustment control process. That is, when the water level of the water tank 21 acquired by the water level acquisition unit 411 reaches the water activation start water level that is a reference water level for starting power generation, the adjustment unit 415 supplies water to the water turbine 31 over a certain period of time. Is adjusted to a supply amount corresponding to the minimum output value of the generator 32, and the monitoring unit 412 is made to monitor the water level of the water tank 21.

  Moreover, the adjustment part 415 determines whether the water level of the water tank 21 rose based on the monitoring result by the monitoring part 412 after fixed time progress.

  When the monitoring unit 412 determines that the water level of the water tank 21 has risen after a certain period of time, the adjustment unit 415 is based on the amount of water flowing into the water tank 21 per unit time calculated by the inflow amount calculation unit 414. The amount of water supplied to the water turbine 31 is adjusted so that the amount of water supplied to the water wheel 31 is equal to the amount of inflow. Subsequently, the adjusting unit 415 determines whether or not the water level of the water tank 21 is stabilized by the monitoring unit 412 after a predetermined time has elapsed, that is, whether or not the fluctuation of the water level is within a predetermined value (for example, several tens of centimeters). Determine. When the monitoring unit 412 determines that the water level in the water tank 21 has become stable after a predetermined time has elapsed, the adjustment unit 415 switches the operation from the drought-time water level adjustment control processing to the normal-time water level adjustment control processing. In addition, when the monitoring unit 412 determines that the water level of the water tank 21 is not stable, the adjustment unit 415 supplies the water to the water tank 21 when the water supply amount to the water turbine 31 is equal to or higher than the supply amount corresponding to the minimum output value. The amount of water supplied to the water turbine 31 is adjusted so as to be equal to the inflow amount of water. Further, when the supply amount of water to the water turbine 31 is less than the supply amount corresponding to the minimum output value, the adjustment unit 415 adjusts the supply amount of water to the water turbine 31 to the supply amount corresponding to the minimum output value.

  When the monitoring unit 412 determines that the water level of the water tank 21 has not risen after a certain time has elapsed, the adjustment unit 415 determines that the water level of the water tank 21 acquired by the water level acquisition unit 411 is a reference water level for stopping power generation. It is determined whether it is below the water stoppage water level. Subsequently, the adjustment unit 415 stops the supply of water to the water turbine 31 when the water level of the water tank 21 is equal to or lower than the water stoppage water level, and when the water level of the water tank 21 is not lower than the water stoppage water level. The supply amount of water to the water turbine 31 is maintained at the supply amount corresponding to the minimum output value again for a certain time, and the monitoring unit 412 determines again whether or not the water level of the water tank 21 has risen.

  The adjustment unit 415 calculates the opening degree of the guide vane 28 corresponding to the adjusted supply amount, generates an opening / closing signal corresponding to the opening degree, and outputs the opening / closing signal to the governor controller 42. To do.

Returning to FIG. 1, the governor control device 42 converts the open / close signal of the guide vane 28 output from the water tank water level adjustment device 41 into a hydraulic signal, and outputs this hydraulic signal to the hydraulic servo motor 43.
The hydraulic servo motor 43 is driven according to the hydraulic signal output from the governor control device 42 and adjusts the opening degree of the guide vane 28.

Then, the flow of the process which adjusts the water level of the water tank 21 by the water tank water level adjustment apparatus 41 is demonstrated.
FIG. 4 is a flowchart showing the flow of a drought-time water level adjustment control process by the aquarium water level adjustment device 41 according to the present embodiment.

  In step S1, the control unit (adjusting unit 415) of the water tank water level adjusting device 41 determines whether or not the water level in the water tank 21 is equal to or higher than the water activation start water level. When this determination is YES, the control unit (adjustment unit 415) of the aquarium water level adjustment device 41 moves the process to step S2, and when this determination is NO, re-executes the process of step S1.

In step S <b> 2, the control unit (adjustment unit 415) of the aquarium water level adjustment device 41 adjusts the supply amount to the water turbine 31 to the supply amount corresponding to the minimum output value of the generator 32. The control unit (adjusting unit 415) of the aquarium water level adjusting device 41 calculates the opening degree of the guide vane 28 based on the adjusted supply amount, generates an opening / closing signal corresponding to the opening degree, and adjusts the opening / closing signal. Output to the speed controller 42.
In step S3, the control unit (adjustment unit 415) of the aquarium water level adjustment device 41 causes the monitoring unit 412 to monitor the water level over a certain period of time.

  In step S <b> 4, the control unit (adjustment unit 415) of the water tank water level adjustment device 41 determines whether or not the water level of the water tank 21 has risen based on the monitoring result by the monitoring unit 412. When this determination is YES, the control unit (adjustment unit 415) of the aquarium water level adjustment device 41 moves the process to step S5, and when this determination is NO, moves the process to step S9.

In step S5, the control unit (adjusting unit 415) of the water tank water level adjusting device 41 causes the inflow amount calculating unit 414 to calculate the inflow amount of water into the aquarium 21 per unit time.
In step S <b> 6, the control unit (adjustment unit 415) of the aquarium water level adjustment device 41 supplies water to the water turbine 31 based on the inflow amount of water into the aquarium 21 per unit time calculated by the inflow amount calculation unit 414. The supply amount is adjusted so that the amount becomes equal to the inflow amount. The control unit (adjusting unit 415) of the aquarium water level adjusting device 41 calculates the opening degree of the guide vane 28 based on the adjusted supply amount, generates an opening / closing signal corresponding to the opening degree, and adjusts the opening / closing signal. Output to the speed controller 42.

  In step S7, the control unit (adjustment unit 415) of the aquarium water level adjustment device 41 causes the monitoring unit 412 to monitor the water level after a fixed time has elapsed from the adjustment in step S6, and whether or not the water level of the aquarium 21 has become stable. That is, it is determined whether or not the fluctuation of the water level is within a predetermined value. When this determination is YES, the control unit (adjustment unit 415) of the aquarium water level adjustment device 41 moves the process to step S8, and when this determination is NO, moves the process to step S5.

  In step S8, when the water level in the water tank 21 is stabilized by the monitoring unit 412 after a certain time has elapsed, the control unit (adjustment unit 415) of the water tank water level adjustment device 41 starts the normal water level from the drought water level adjustment control process. Switch operation to adjustment control processing. When this process ends, the control unit ends the drought water level adjustment control process.

  In step S9, the control part (adjustment part 415) of the water tank water level adjustment apparatus 41 determines whether the water level of the water tank 21 acquired by the water level acquisition part 411 is below a water stoppage water level. When this determination is YES, the control unit (adjustment unit 415) of the aquarium water level adjustment device 41 moves the process to step S10, and when this determination is NO, moves the process to step S3.

  In step S <b> 10, the control unit (adjustment unit 415) of the aquarium water level adjustment device 41 stops supplying water to the water turbine 31. Then, the control part (adjustment part 415) of the water tank water level adjustment apparatus 41 moves a process to step S1.

  Subsequently, in a drought period, a comparison between the fluctuation of the water level when the water level is adjusted by the aquarium water level adjustment apparatus 41 of the present embodiment and the fluctuation of the water level when the water level is adjusted by a conventional aquarium water level adjustment apparatus. Do.

  5 and 6 are diagrams showing the fluctuation of the water level and the generator output when the water level of the aquarium 21 is adjusted by the aquarium water level adjusting device 41 according to this embodiment. Specifically, FIG. 5 is a diagram showing the fluctuation of the water level and the generator output when the inflow amount to the water tank 21 is larger than the inflow amount corresponding to the minimum output. Moreover, FIG. 6 is a figure which shows the fluctuation | variation of the water level and generator output when the inflow amount to the water tank 21 is small compared with the inflow amount corresponding to the minimum output. FIG. 7 is a diagram showing the fluctuation of the water level and the generator output when the water level of the water tank 21 is adjusted by a conventional water tank water level adjusting device.

Below, when performing the water level adjusted by the aquarium water level adjusting device 41 of this embodiment, and when performing level adjustment by conventional aquarium water level adjusting device, as it reaches the応水start water level at time t ₀ Give an explanation.

When the water level in the water tank 21 reaches the response start water level at time t ₀ , the conventional water tank water level adjusting device is configured so that the water level in the water tank 21 is high, and as shown in FIG. The amount of water supplied to 31 is adjusted. In the drought period, since the amount of water flowing into the water tank 21 is small, the water level of the water tank 21 rapidly decreases and reaches the water stoppage water level in a relatively short time. Then, the conventional aquarium water level adjusting device, by stopping the supply of water to the water wheel 31 at time t _11, stopping the power generation.

On the other hand, in the aquarium water level adjustment device 41 according to the present embodiment, when the response water starting water level is reached at time t ₀ , the amount of water supplied to the water turbine 31 is adjusted so as to generate power with the lowest output. For this reason, compared with the fall of the water level by the conventional water tank water level adjustment apparatus, a water level falls gently.

In FIG. 5, the amount of inflow into the water tank 21 becomes larger than the amount of inflow corresponding to the minimum output at time t _21, and the water level of the water tank 21 rises. Then, a certain time period from the time t _21, At time t _22, the aquarium water level adjusting device 41 performs the inflow into the water tub 21, the adjustment of the water level so that the supply to the hydraulic turbine 31 is equal, as a result, the water level of the water tank 21 is stabilized at time _{t 23.} Then, the aquarium water level adjusting device 41 switches from the drought water level adjustment control process to the normal water level adjustment control process.

Further, in FIG. 6, because the inflow into the water tank 21 is smaller than the inflow amount corresponding to the minimum output, the water level of the water tank 21 gradually decreases at time t _31, the water level of the aquarium 21応水stop level To reach. Then, the aquarium water level adjusting device 41 stops the water supply to the water turbine 31 and stops the power generation. Here, the time t ₃₁ becomes a sufficiently large compared to the time t ₁₁ stopping the power generation when performing level adjustment by conventional aquarium water level adjusting device, as compared with the conventional aquarium water level adjusting device, continuous In addition, power generation by the generator 32 can be performed.

As described above, according to the present embodiment, the adjustment unit 415 of the water tank water level adjustment device 41 determines the amount of water supplied to the water turbine 31 over a certain period of time when the supply of water to the water turbine 31 is started. If the monitoring unit 412 determines that the water level in the water tank 21 has not risen after a lapse of a fixed time, the water supply amount to the water turbine 31 is set to the minimum output value. Maintain the corresponding supply.
Therefore, even if the inflow amount of water into the water tank 21 is equal to or less than the inflow amount corresponding to the minimum output value of the generator 32, the supply amount of water to the water turbine 31 is the supply amount corresponding to the minimum output value of the generator 32. Adjust to. For this reason, like the water level adjustment by the conventional water tank water level adjusting device, the water level of the water tank 21 does not rapidly decrease, and the power generation by the generator 32 can be performed for a long time. Therefore, even when the inflow amount to the aquarium 21 is small, the aquarium water level adjusting device 41 can generate power by the generator 32 and can effectively use water.

Further, according to the present embodiment, the adjustment unit 415 of the aquarium water level adjustment device 41 sets the supply amount of water to the water turbine 31 over a certain period of time when the supply of water to the water turbine 31 is started. When the monitoring unit 412 determines that the water level in the water tank 21 has risen after a lapse of a certain time, the inflow amount calculating unit 414 calculates the inflow amount of water into the water tank 21. The amount of water supplied to the water turbine 31 is adjusted to be equal to the inflow amount.
Therefore, even if the inflow amount of water into the aquarium 21 is equal to or greater than the supply amount corresponding to the minimum output value of the generator 32, the aquarium water level adjusting device 41 can reduce the supply amount of water to the water turbine 31 by this amount. By making it correspond to the amount of inflow, it is possible to prevent the overflow from the water tank 21 and continue the power generation, so that the power generation can be performed efficiently.

Further, according to the present embodiment, the adjustment unit 415 of the water tank water level adjustment device 41 supplies water to the water turbine 31 when the water level of the water tank 21 acquired by the water level acquisition unit 411 reaches the response start water level. Start.
Therefore, the water tank water level adjusting device 41 supplies water to the water turbine 31 in accordance with the lowest output value of the generator 32 from the state where the water level of the water tank 21 is the high water level, which is the water response start water level. The power generation can be continued for a long period of time while utilizing the head.

Moreover, according to this embodiment, the adjustment part 415 of the water tank water level adjustment apparatus 41 is acquired by the water level acquisition part 411, when the monitoring part 412 determines with the water level of the water tank 21 not rising after progress for a fixed time. It is determined whether the water level in the water tank 21 is lower than the water stoppage water level. If the water level is not lower than the water supply stop water level, the supply amount is maintained at the supply amount corresponding to the minimum output value. In the following cases, water supply to the turbine is stopped.
Therefore, since the aquarium water level adjustment device 41 can maintain the supply amount of water to the water turbine 31 at a supply amount corresponding to the minimum output value until the water level is below the water stoppage water level, power generation is continued for a longer period of time. Can be made.

Further, according to the present embodiment, the adjustment unit 415 of the water tank water level adjustment device 41 determines that the water level has risen by the monitoring unit 412 after a lapse of a certain time, the water level of the aquarium 21 is further increased after a certain time has elapsed. When it is determined whether or not the water level in the water tank 21 is stable, the inflow amount calculation unit 414 calculates the inflow amount so that the water supply amount to the water turbine 31 is equal to the inflow amount. Readjust.
Therefore, since the amount of water supplied to the water turbine 31 is adjusted in response to fluctuations in the amount of water flowing into the water tank 21, overflow is prevented even when the amount of water flowing into the water tank 21 fluctuates. In addition, power can be generated efficiently using water.

  The embodiment of the present invention has been described above, but the present invention is not limited to the present embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.

DESCRIPTION OF SYMBOLS 1 Hydroelectric power generation system 21 Water tank 24 Water level meter 31 Water wheel 32 Generator 41 Water tank water level adjustment apparatus 411 Water level acquisition part 412 Monitoring part 413 Output value acquisition part 414 Inflow amount calculation part 415 Adjustment part

Claims (4)

A water tank level adjusting device for adjusting the water level of a water tank for storing water for driving a water turbine of a hydroelectric generator,
A water level acquisition unit that acquires the water level of the water tank from a water level gauge provided in the water tank,
A monitoring unit that monitors fluctuations in the water level acquired by the water level acquisition unit;
An adjusting unit for adjusting the amount of water stored in the water tank to the water wheel;
An inflow amount calculation unit that calculates an inflow amount of water into the water tank in a unit time based on the fluctuation of the water level acquired by the water level acquisition unit and the supply amount;
With
The adjustment unit is
When starting to supply water to the water turbine, the supply amount is adjusted to a supply amount corresponding to the minimum output value of the hydroelectric generator over a certain period of time,
If the monitoring unit determines that the water level has not risen after the lapse of the predetermined time, the supply amount is maintained at a supply amount corresponding to the minimum output value,
When the monitoring unit determines that the water level has risen after the lapse of the predetermined time, the inflow amount calculation unit calculates the inflow amount, and adjusts the supply amount to be equal to the inflow amount. Adjustment device.   The said adjustment part is an aquarium water level adjustment apparatus of Claim 1 which starts supply of water to the said waterwheel, when the said water level acquired by the said water level acquisition part reaches a water supply starting water level.   If the monitoring unit determines that the water level has not risen after the lapse of the predetermined time, the adjustment unit determines whether the water level of the water tank acquired by the water level acquisition unit is equal to or lower than the water stoppage water level. If the water supply stop water level is not lower than the water stoppage water level, the supply amount is maintained at a supply amount corresponding to the minimum output value, and if the water supply stop water level is lower than the water supply stop water level, the water supply to the water turbine is maintained. The aquarium water level adjusting device according to claim 1 or 2, wherein   When the adjustment unit determines that the water level has risen by the monitoring unit after the elapse of the predetermined time, the adjustment unit further determines whether the water level of the water tank is stable after the elapse of the predetermined time, and the water level of the water tank The water tank level adjustment according to any one of claims 1 to 3, wherein the inflow amount calculation unit calculates the inflow amount and the supply amount is readjusted to be equal to the inflow amount when the inflow amount is not stable. apparatus.

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