JP2014169590A - Dam sand sluice opening/closing control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dam sand sluice opening/closing control device capable of automatically ensuring a responsibility outflow rate to a downstream river at the time of tripping of a hydraulic turbine generator.SOLUTION: A dam sand sluice opening/closing control device 10 opens a dam sand sluice 6 to ensure a responsibility outflow rate to a downstream river 7 at the time of tripping of a hydraulic turbine generator 3 installed in a reregulating reservoir type hydraulic power plant. The dam sand sluice opening/closing control device 10 includes: a sand sluice aperture calculation part 15 functioning as dam sand sluice opening/closing control means for controlling opening/closing of the dam sand sluice 6 on the basis of an ALR set value for performing opening/closing control of a guide vane of the hydraulic turbine generator 3 and a dam water level which is the water level of a reregulating reservoir 1 of the reregulating reservoir type hydraulic power plant, so as to ensure the responsibility outflow rate during the operation of the hydraulic turbine generator 3 at the time of tripping of the hydraulic turbine generator 3; a sand sluice aperture deviation detection part 16; and a sand sluice control part 17.

Description

  The present invention relates to a dam drainage gate opening / closing control apparatus suitable for performing opening / closing control of a dam drainage gate when a turbine generator installed in a reverse adjustment pond type hydroelectric power plant trips.

  In a dam type hydroelectric power plant, reverse regulated pond type hydropower as shown in Fig. 4 is used to discharge the river downstream (responsible for river maintenance flow rate and water use flow rate (guarantee water, agricultural water, industrial water, etc.)). There is a power plant.

Therefore, in the reverse adjustment pond type hydroelectric power station, the guide vane opening degree control is normally performed from the turbine generator load control device (ALR) 120 for performing the guide vane opening / closing control (turbine generator load control) of the turbine generator 3. By outputting the signal S _GV to the turbine generator 3 and automatically controlling the guide vane opening of the turbine generator 3, the turbine generator 3 is operated with a determined amount of water.

When the turbine generator 3 is stopped by inspection, the dam drainage gate 6 is opened and discharged from the reverse adjustment pond 1 (reservoir) to the downstream river 7 through the drainage water channel 5 as follows. This ensures a responsible discharge.
(1) The worker opens the dam drainage gate 6 by local manual operation.
(2) When the dam drainage gate control panel 110 is installed, the dam drainage gate control panel 110 obtains the water turbine based on the guide vane opening signal S _AGV from the turbine generator load control device 120. equalizing reservoir 1 of water indicated from the generator water consumption and dam water level indicator 130 by the dam water level signal S _DL (hereinafter referred to as. "dumb water level") is calculated Haisunamon opening based on a was calculated A dam drainage gate motor (not shown) for opening and closing the dam drainage gate 6 is driven to open the dam sandgate opening, and the dam drainage gate 6 is automatically opened.

Furthermore, when the turbine generator 3 trips (emergency stop), the dam drainage gate 6 is opened and discharged from the reverse adjustment pond 1 to the downstream river 7 through the drainage water channel 5 as follows. Therefore, responsible discharge is secured.
(1) The controller opens the dam drain gate 6 from the control station (far).
(2) when the dam Haisunamon control panel 110 is installed, the dam Haisunamon control panel 110, the trip signal S _TR from hydraulic turbine generator 3 is input, in order to prevent the excessive discharge Then, after opening the dam draining gate 6 to a predetermined opening (for example, a position determined mechanically by a limit switch), the controller opens or closes the dam draining gate 6 from the control station to set the flow rate. adjust.

  In Patent Document 1 below, in order to enable stable operation control by appropriately controlling the water wheel and the discharge valve when an abnormality occurs in the water wheel, the guide vane opening degree of the water wheel is changed by the water wheel drive control unit. The discharge valve is adjusted by changing the discharge valve opening by the discharge valve drive control unit, and the guide vane opening and discharge are adjusted to the turbine drive control unit and the discharge valve drive control unit. The valve opening is always input, and in the event of an abnormality such as an accident inside the turbine, the guide vane of the turbine is closed when the abnormality occurs, while the guide vane of the turbine is closed and the drive is stopped. A hydroelectric power generation facility that has an opening corresponding to (flowing water amount) is disclosed.

JP 2003-343413 A

  However, in the case of the responsible discharge method in the conventional reverse adjustment pond type hydroelectric power plant, even if the dam drainage gate control panel 110 is installed, when the turbine generator 3 is tripped, in order to prevent excessive discharge, the dam discharge The problem is that it is necessary for the controller to open or close the dam drainage gate 6 from the control station to the responsible discharge opening after opening the dam drainage gate 6 to a predetermined opening by the sand gate control panel 110. was there.

The hydroelectric power generation facility disclosed in Patent Document 1 has the following problems.
(1) Since the amount of running water is recalculated from the guide vane opening, an error occurs in the calculated value.
(2) Since the discharge valve is controlled by the calculated value, an error occurs again.
(3) It has a dual control function of a turbine control function and a discharge valve control function by recalculation of the flow rate.

  An object of the present invention is to provide a dam discharge sand gate opening / closing control device capable of automatically ensuring a responsible discharge flow to a downstream river when a turbine generator trip occurs.

The first dam sand gate opening and closing control device according to the present invention opens and closes a dam sand gate opening and closing gate for securing a responsible discharge to a downstream river by opening a dam sand gate provided in a dam when a turbine generator trips. A control device comprising: an ALR set value for controlling opening and closing of the guide vanes of the turbine generator so as to ensure a responsible discharge flow during operation of the turbine generator when the turbine generator trips; The dam drainage gate opening / closing control means for performing the opening / closing control of the dam drainage gate based on the water level of the dam is provided.
The second dam drainage gate opening and closing control device of the present invention opens the dam drainage gate (6) when the turbine generator (3) installed in the reverse adjustment pond type hydroelectric power plant trips, and opens the downstream river (7). A dam drainage gate opening and closing control device (10) for ensuring a responsible discharge flow to the turbine, such that when the turbine generator is tripped, the turbine is configured to ensure a responsible discharge flow during operation of the turbine generator. Based on the ALR set value for opening / closing control of the generator guide vane and the dam water level which is the water level of the reverse adjustment pond (1) of the reverse adjustment pond type hydroelectric power plant, A dam drainage gate opening / closing control means for performing is provided.
Here, the dam drainage gate opening and closing control means is provided between the reverse adjustment pond (1) of the reverse adjustment basin type hydroelectric power plant and the downstream river, with the horizontal axis as the drainage gate opening degree and the vertical axis as the reverse adjustment pond type hydroelectric power plant. Using the dam drainage gate QH curve with the dam water level as a parameter, the responsible water discharge indicated by the ALR set value is converted into the flow rate of the trash drainage channel. In addition, a sand discharge gate opening degree calculation means for calculating a sand discharge gate opening degree based on the converted flow rate of the sand discharge water channel and the dam water level may be provided.
When the trip signal (S _TR ) is input from the turbine generator, the dam drain gate opening / closing control means is provided in the ALR set value stored in the ALR set value memory (14) and the reverse adjustment pond. A sand discharge gate opening calculation unit (15) for calculating the opening of the sand discharge gate using the dam discharge gate QH curve based on the dam water level input from the dam water level meter (130); A sand gate opening deviation detector for obtaining a sand gate opening deviation which is a difference between the sand gate opening calculated by the sand gate opening calculator and a current sand gate opening. (16) and the current sand gate opening degree are corrected based on the sand gate opening degree deviation obtained by the sand gate opening degree deviation detection unit, and the corrected sand gate opening degree is obtained. As described above, the dam drainage gate opening / closing control may be provided.
A guide vane opening / closing control means for performing opening / closing control of the guide vane of the water turbine generator based on the ALR set value and the dam water level during the operation of the water turbine generator may be further provided.
The guide vane opening / closing control means sets the horizontal axis as the guide vane opening, the vertical axis as the flow rate of the conduit (2) provided between the reverse adjustment reservoir and the turbine generator, and the dam water level as a parameter. Using the PQH curve, the responsible water discharge amount indicated by the ALR set value is converted into the flow rate of the conduit, and the guide vane opening is calculated based on the converted flow rate of the conduit and the dam water level May be.
The guide vane opening / closing control means calculates a guide vane opening calculation unit (11) for calculating a guide vane opening using the PQH curve based on the ALR set value and the dam water level, and the guide vane opening A guide vane opening deviation detector (12) for obtaining a guide vane opening deviation which is a difference between the guide vane opening calculated by the degree calculator and the current guide vane opening, and the guide vane deviation detection The present guide vane opening degree is corrected based on the guide vane opening degree deviation obtained by the section, and the guide vane opening / closing control of the turbine generator is performed so as to be the corrected guide vane opening degree. The guide vane control part (13) may be provided.

The dam sand gate opening and closing control device of the present invention has the following effects.
(1) By automatically controlling the opening and closing of the dam drainage gate based on the ALR set value and the dam water level when the turbine generator trips, the responsible discharge flow to the downstream river when the turbine generator trips is automatically secured. In addition, the water level fluctuation in the downstream river can be greatly suppressed.
(2) When performing the opening / closing control of the dam drainage gate when the turbine generator trips, the operation by the controller at the control station can be eliminated, so the work efficiency can be improved.

It is a figure which shows the structure of the dam drainage gate opening / closing control apparatus 10 by one Example of this invention. It is a figure for demonstrating a PQH curve and a dam drainage gate QH curve. It is a figure for demonstrating that the dam drainage gate opening / closing control apparatus 10 shown in FIG. 1 can be used instead of the turbine generator load control apparatus 120 and the dam drainage gate control panel 110 shown in FIG. It is a figure for demonstrating the responsible discharge method in the conventional reverse adjustment pond type hydroelectric power station.

  The above object was realized by controlling the opening and closing of the dam drainage gate using the dam drainage gate QH curve based on the ALR set value and the dam water level when the turbine generator trips.

Hereinafter, embodiments of the dam drainage gate opening and closing control device of the present invention will be described with reference to the drawings.
In the dam drainage gate opening / closing control device of the present invention, the water turbine generator load control device 120 has a horizontal axis as shown in the PQH curve (as shown in FIG. 2A) based on the ALR set value (responsible discharge flow rate) and the dam water level. A guide vane opening / closing control function is used to maintain the water discharge capacity of the turbine generator at a responsible discharge flow rate using the guide vane opening, the vertical axis as the flow rate of the water conduit 2, and the dam water level as a parameter. In view of this, when the turbine generator 3 is tripped, the dam drainage gate QH curve based on the ALR set value and the dam water level (as shown in FIG. 2 (b), the horizontal axis is the sandgate opening, Responsibility to the downstream river 7 when the turbine generator 3 trips by controlling the opening and closing of the dam drainage gate 6 using the control curve with the vertical axis as the flow rate of the drainage channel 5 and the dam water level as a parameter) To ensure the discharge flow automatically And wherein the Rukoto.

  Therefore, the dam drainage gate opening / closing control apparatus 10 according to one embodiment of the present invention, as shown in FIG. 1, a guide vane opening degree calculation unit 11 (hereinafter referred to as “GV opening degree calculation unit 11”), Guide vane opening deviation detector 12 (hereinafter referred to as “GV opening deviation detector 12”), guide vane controller 13 (hereinafter referred to as “GV controller 13”), and a control station. An ALR set value memory 14 storing ALR set value data indicating an ALR set value based on the command value, a sand removal gate opening calculation unit 15, a sand removal gate opening deviation detection unit 16, and a sand removal gate control Part 17.

  Here, the GV opening calculation unit 11, the GV opening deviation detection unit 12, the GV control unit 13, and the ALR set value memory 14 are similar to the water turbine generator load control device 120 shown in FIG. This is for realizing the function of performing the guide vane opening / closing control of the turbine generator 3 using the PQH curve based on the dam water level.

That is, the GV opening calculation unit 11 indicates the ALR set value indicated by the ALR set value data read from the ALR set value memory 14 and the dam water level signal S _DL from the dam level gauge 130 installed in the reverse adjustment pond 1. The guide vane opening is calculated using the PQH curve based on the dam water level (convert the responsible water discharge indicated by the ALR setting value to the flow rate of the diversion channel 2 and convert the converted diversion channel flow rate and dam water level Based on the above, the guide vane opening is calculated using the PQH curve).

The GV opening deviation detector 12 is a difference between the guide vane opening calculated by the GV opening calculator 11 and the current guide vane opening indicated by the guide vane opening signal S _AGV from the GV controller 13. This is for obtaining a certain guide vane opening deviation.

The GV control unit 13 corrects the current guide vane opening degree based on the guide vane opening degree deviation obtained by the GV opening degree deviation detection unit 12, and the turbine generator 3 so as to obtain the corrected guide vane opening degree. This is for generating the guide vane opening control signal S _GV for performing the guide vane opening / closing control.
The guide vane opening degree control signal S _GV generated by the GV control unit 13 is output to the turbine generator 3.

  Thereby, similarly to the water turbine generator load control device 120 shown in FIG. 4, the responsible discharge flow to the downstream river 7 during operation of the water turbine generator 3 can be automatically secured.

  The sand discharge gate opening calculation unit 15, the sand discharge gate opening deviation detection unit 16, and the sand discharge gate control unit 17 calculate the dam discharge sand gate QH curve based on the ALR set value and the dam water level when the turbine generator 3 trips. It is for realizing the function of performing the opening and closing control of the dam draining gate 6 by using.

That is, when the trip signal _STR is input from the turbine generator 3, the sluice gate opening calculation unit 15 receives the ALR set value and the dam water level gauge 130 indicated by the ALR set value data read from the ALR set value memory 14. dam water level signal S on the basis of the dam water level indicated by _DL calculating a Haisunamon opening with dams Haisunamon QH curve (flow rate of Haisuna waterway 5 responsible water discharge amount indicated by the ALR setting value from And calculating the drainage gate opening degree using the dam drainage gate QH curve based on the converted flow rate of the drainage waterway 5 and the dam water level).

Haisunamon opening deviation detector 16, the current indicated by the sediment Gate opening signal S _ASS from Haisunamon opening and Haisunamon controller 17 calculated by the Haisunamon opening calculating section 15 This is for obtaining a sand gate opening deviation which is a difference from the sand gate opening.

The sand removal gate control 17 corrects the current sand removal gate opening degree based on the sand removal gate opening degree deviation obtained by the sand removal gate opening degree deviation detection unit 16 to obtain the corrected sand removal gate opening degree. as it is for generating a Haisunamon opening control signal S _SS for the opening and closing control of the dam Haisunamon 6.
Haisunamon opening control signal S _SS generated by Haisunamon control 17 is outputted to the dam Haisunamon motor (not shown) for opening and closing the dam Haisunamon 6.

  Thereby, the responsible discharge flow to the downstream river 7 at the time of the trip of the water turbine generator 3 can be automatically ensured.

  In addition, as shown in FIG. 3, by adding all functions other than the function at the time of trip of the turbine generator 3 of the dam draining gate control panel 110 shown in FIG. The dam discharge sand gate opening / closing control device 10 can be used in place of the turbine generator load control device 120 and the dam discharge sand gate control panel 110.

  The dam drainage gate opening and closing control device of the present invention can also be applied to a responsible discharge power plant and a responsible discharge valve directly under a high dam.

DESCRIPTION OF SYMBOLS 1 Reverse adjustment pond 2 Water guide channel 3 Turbine generator 4 Drainage channel 5 Drainage channel 6 Dam drainage gate 7 Downstream river 10 Dam drainage gate opening / closing control device 11 GV opening calculation part 12 GV opening deviation detection part 13 GV control Unit 14 ALR set value memory 15 sand removal gate opening calculation unit 16 sand removal gate opening deviation detection unit 17 sand removal gate control unit 110 dam sand removal gate control panel 120 turbine generator load control device 130 dam water level gauge S _AGV guide Vane opening signal S _ASS Drain gate opening signal S _DL Dam water level signal S _GV Guide vane opening control signal S _SS Drain gate opening control signal S _TR trip signal

Claims (7)

A dam drainage gate opening and closing control device for opening a dam drainage gate provided in the dam at the time of a turbine generator trip and ensuring a responsible discharge flow to the downstream river,
Based on the ALR set value for controlling the opening and closing of the vane of the turbine generator and the water level of the dam so as to ensure the responsible discharge flow during operation of the turbine generator when the turbine generator trips A dam drainage gate opening / closing control device comprising dam drainage gate opening / closing control means for performing opening / closing control of the dam drainage gate. Opening and closing the dam drainage gate to open the dam drainage gate (6) and ensure the responsible discharge to the downstream river (7) when the turbine generator (3) installed in the reverse adjustment pond hydroelectric power plant trips A control device (10) comprising:
When the turbine generator trips, the ALR set value for controlling the opening and closing of the guide vanes of the turbine generator so as to ensure the responsible discharge flow during operation of the turbine generator and the reverse adjustment pond hydroelectric power plant A dam drainage gate opening and closing control means for controlling the opening and closing of the dam drainage gate based on the dam water level which is the water level of the reverse adjustment pond (1) of the dam Control device.   The dam drainage gate opening / closing control means has a sandstone gate opening on the horizontal axis, and the vertical axis indicates the drainage provided between the reverse regulation pond (1) of the reverse regulation pond type hydroelectric power plant and the downstream river. Using the dam drainage gate QH curve with the flow rate of the sand water channel (5) as a parameter, the responsible water discharge amount indicated by the ALR set value is converted into the flow rate of the waste water channel, A dam sand gate opening / closing control device according to claim 2, further comprising: a sand sluice gate opening calculating means for calculating a sand sluice gate opening based on the flow rate of the drained water channel and the dam water level. The dam drainage gate opening and closing control means,
When a trip signal (S _TR ) is input from the turbine generator, the ALR set value stored in the ALR set value memory (14) and the dam water level meter (130) provided in the reverse adjustment pond are input. A sand discharge gate opening calculation unit (15) for calculating the discharge sand opening using the dam discharge sand QH curve based on the dam water level;
Drainage gate opening deviation detector for obtaining a sandgate opening deviation which is the difference between the sandgate opening calculated by the sandgate opening calculation unit and the current sandgate opening ( 16)
The current sluice gate opening degree is corrected based on the sluice gate opening degree deviation determined by the sluice gate opening degree deviation detection unit, and the dam discharge amount is adjusted so as to be the corrected sunk gate opening degree. A sand discharge gate control section (17) for controlling the opening and closing of the sand gate;
The dam drainage gate opening / closing control device according to claim 3, comprising:   The apparatus further comprises a guide vane opening / closing control means for performing opening / closing control of the guide vane of the turbine generator based on the ALR set value and the dam water level during operation of the turbine generator. Item 5. A dam drainage gate opening / closing control device according to any one of Items 2 to 4.   The guide vane opening / closing control means sets the horizontal axis as the guide vane opening, the vertical axis as the flow rate of the conduit (2) provided between the reverse adjustment reservoir and the turbine generator, and the dam water level as a parameter. Using the PQH curve, the responsible water discharge amount indicated by the ALR set value is converted into the flow rate of the conduit, and the guide vane opening is calculated based on the converted flow rate of the conduit and the dam water level The dam drainage gate opening / closing control device according to claim 5, wherein: The guide vane opening / closing control means includes
A guide vane opening calculation unit (11) for calculating a guide vane opening using the PQH curve based on the ALR set value and the dam water level;
A guide vane opening deviation detector (12) for obtaining a guide vane opening deviation which is a difference between the guide vane opening calculated by the guide vane opening calculator and the current guide vane opening;
The current guide vane opening degree is corrected based on the guide vane opening degree deviation obtained by the guide vane deviation detecting unit, and the guide vane of the water turbine generator is adjusted so as to be the corrected guide vane opening degree. A guide vane control unit (13) for performing opening and closing control;
The dam drainage gate opening and closing control device according to claim 6, comprising:

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