JPS58219616A - Desired value controller for flow rate of conveyed water in open channel - Google Patents

Abstract

PURPOSE:To realize stable water conveyance with less variations in the demanded amount of water and the level in an open channel, by inputting a desired water supply flow rate signal which is generated while the variation in the demanded amount of water, flowrate transfer delay, etc., are considered to a water supply flow rate controller. CONSTITUTION:An adder adds a demanded water amount signal 25 converted by a function generator 24 to a flow rate signal 40 for correcting the reserved amount of water which is obtained by dividing a reserved amount deviation signal by a division coefficient signal outputted from a manual setter 38, obtaining the desired water supply flow rate signal 41. This signal is outputted to the water supply flow rate controller 42 which performs sampling control while considering the transfer delay of a flow rate. On the other hand, the output of an open channel flow rate oscillator 43 provided to the open channel 27 is converted by a flow rate converter 44 into an open channel flow rate signal 45, which is inputted to the controller 42. The controller 42 outputs a gate on-off signal 46 to a gate controller 47 according to the deviation between the signals 41 and 45. The controller 47 opens or closes a gate 49 according to the signal 46 to control the flow rate of water from a reservoir 50 to the open channel 27.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a device for controlling a target flow rate of water when water is sent from a reservoir to a hydroelectric power plant or the like via an open channel.

[Technical background of the invention]

The amount of water demanded for power generation at a hydroelectric power plant varies depending on the power generation equipment capacity, number of generators, generator efficiency, operating method, etc. in addition to electric power.

To solve this problem, conventionally, a device as shown in FIGS. 1 and 2 is used.

That is, in the device shown in FIG. 1, a generated power transmitter 3 is attached to the power generating equipment 2 of a hydroelectric power plant 1, a generated power signal 4 is output from the transmitter 3, and a function is generated using the generated power signal 4 as input. The demand water amount signal 6 is output as a demand water amount signal 6 by the water supply device 5, and this demand water amount signal 6 is inputted to the water supply flow rate controller 7.

On the other hand, a signal from an open channel flow rate signal 9 disposed in the open channel 8 is converted into an open channel flow rate signal 11 by a flow rate converter 10, and this open channel flow rate signal 11 is inputted to the water flow copper adjustment tube needle 7. I have to.

Therefore, in this water supply flow rate controller 7, depending on the deviation between the demand water amount signal 6 and the open channel flow rate signal 11,
- Output gate opening/closing signal 12 to gate control device 13 t-,
, This cage control device 13 opens and closes a cage 15 installed in the dam 14 by a predetermined amount to control the amount of water flowing into the open channel 8.

Further, the device shown in FIG. 2 has an open channel water level transmitter 16 installed at a position near the hydroelectric power plant 1 in an open channel 8, and the output from this open channel water level transmitter 16 is transmitted to an open channel water level converter 17. The open channel water level signal 18 and [2 are outputted, and the open channel water level controller 19 uses the open channel water level signal 18 as input, and outputs the r-) open/close signal 12 as described above.
3, the r-t 15 installed in the dam 14 is opened and closed by a predetermined amount to adjust the amount of water flowing into the open channel 8.

[Intermediate points of background technology]

11: Conventionally, the amount of water flowing into an open channel has been controlled by the above-mentioned means, but when the open channel is long or there are large fluctuations in the amount of water demanded by power generation equipment, there may be a delay in the transmission of the flow rate. In addition, the inflow into the open channel due to natural phenomena such as rainfall is not taken into account; therefore, the fluctuation of the water level in the open channel becomes large, and as a result, power generation due to overflow from the open channel or lowering of the water level in the open channel. There is a risk that an accident such as a stoppage may occur.

[Objective of the Invention 1 The present invention has been made in order to improve the above-mentioned conventional problems, and its purpose is to control the amount of water conveyed using a target water flow rate signal calculated according to the open channel water level. 1. To control. An object of the present invention is to provide a water supply flow rate target value control device for an open channel, which is capable of supplying water stably with little fluctuation in demand water amount and open channel water level.

[Summary of the invention]

In order to achieve such an object, the present invention provides a function generator for converting an open channel water level into an open channel water storage amount, a manual setting device for setting an open channel water storage amount target value, and a water storage amount target value. and the open channel water storage 1; a divider that calculates a corrected flow rate for correcting the open channel water storage amount from the difference in water storage amount; and a manual setting for setting a division coefficient. a function generator that calculates the amount of water required for power generation from the power generation magic power, and an adder that calculates the sum of the corrected flow rate and the amount of water demand, and a water supply flow rate target value signal output from this adder. The gist is that the amount of opening/closing of r-) is controlled according to the amount of opening/closing.

[Embodiments of the invention]

Hereinafter, an example of the implementation of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a block diagram showing a schematic configuration of the water supply nagakuma control device according to the present invention, in which a generated power transmitter 22 is attached to the power generating equipment 21 of the new hydroelectric power generation field, and a generated power signal from the transmitter 22 is transmitted. 23 is inputted to the function generator 5, the generated power signal 23 is converted into the demand water amount signal 5 by the function generator 24, and this demand/water amount signal 25 is inputted to the adder 26.

An open channel water level transmitter section is still provided in the open channel 27.

The output of this water level transmitter 28 is input to an open channel water level converter 29 and outputted as an open channel water level signal 30, and this open channel water level signal (supplement) is inputted to a function generator 31. The function generator 31 receives the open channel water level signal 30 and outputs it to the subtracter 33 as an open channel water storage amount signal 32.

In this function generator 31, when the shape of the open channel is columnar with a trapezoidal cross section as shown in FIGS. 4 and 5, the amount of water stored in the open channel is calculated using the following calculation formula.

a+(a+2H-b/.) Q= Only when the gradient in the horizontal direction is small.

Further, the subtracter 33 is configured to input an open channel water storage amount target value signal 35 outputted from a manual setting device 34 in which the open channel water storage amount target value is set. The subtracter 33 calculates the difference between the open channel water storage amount target value signal 35 and the open channel water storage amount signal 32 and outputs it to the divider 37 as a water storage amount deviation signal 36. The divider 37 divides the water storage amount deviation signal 36 by the division coefficient signal 39 output from the manual setting device 38 to calculate the water storage amount correction flow signal 40. The signal is inputted to the adder 26 mentioned above.

The adder 26 adds the demand water amount signal 25 and the water storage amount correction flow rate signal 40 to obtain a water supply flow rate target value signal 41, which is used for sampling control in consideration of the flow rate transmission delay. Water supply flow rate controller 42
I am trying to output to .

On the other hand, the output from the open channel flow rate transmitter 43 provided in the open channel 27 is converted into an open channel flow rate signal 45 by a flow rate converter 44,
This open channel flow rate signal 45 is forced to be input to the flow rate controller 42 .

In this flow rate controller 42, r-
A dart opening/closing signal 46 is output to a dart control device 47. This gate control device t47 is installed on the dam 48, opens and closes the body 49, and controls the amount of water flowing from the reservoir 50 to the open channel 27, according to the gate opening/closing signal 46. There is.

[Effects of the Invention 1] As is clear from the above explanation, according to the present invention, fluctuations in demand water volume, flow rate transmission delays, etc. Water flow considering 1. Since the target value signal is input,
By making effective use of the water storage capacity of open channels, it has many advantages, such as being able to stably supply water in accordance with the water demand without large fluctuations in the open channel water level. .

[Brief explanation of drawings]

Figures 1 and 2 are block diagrams showing the configuration of a conventional water supply flow rate control device, Figure 3 is a block diagram showing the configuration of a water supply flow rate control device according to the present invention, and Figure 4 is a side view of an open channel. ,
FIG. 5 is a cross-sectional view of the open channel. 1, 20...Hydroelectric power plant, 5, 24. β1...Function generator. 7.42... Water supply flow rate regulator, 8.27... Open channel, 26... Adder, 33... Subtractor, 34, 38
. . . Manual setting device, 37 . . . Divider, 41 . . . Water supply flow rate target value signal. Applicant's agent Kiyoshi Inomata = 75 V13 Figure ~ 2゜18 ( Cloth 4 Figure 7 Cloth Figure 5

Claims (1)

[Claims] A function generator that converts the open channel water level to the open channel water storage amount, a manual setting device that sets the open channel water storage amount target value, and calculates the difference in water storage amount between this open channel water storage amount target value and the open channel water storage amount. A subtractor that calculates the corrected flow rate for correcting the open channel water storage amount from this difference in water storage amount, a manual setting device for setting the division coefficient, and a subtracter that calculates the amount of water required for power generation from one generated power. A water supply flow rate target for an open channel characterized by comprising a function generator for calculating, and an adder for outputting a water supply flow rate target value signal obtained by adding the demand water amount and the corrected water amount to a water supply flow rate regulator. Value control device.