JPS6110615A - Hydroelectric power plant - Google Patents

Abstract

PURPOSE:To prevent a water supply tank or a storage reservoir from overflowing, by a method wherein a bypass pipe, branched from a penstock and opened to a diversion channel, is installed, and a flow rate regulating valve is located in the line of the bypass pipe. CONSTITUTION:A reference water level signal from a reference value setter 13 and a water level signal, detected by a water level gauge 2 for a water supply tank or a storage reservoir 1, are inputted to a comparator 14 for comparison. By means of an output signal from the comparator 14, a motor 11 is driven through a motor driving circuit 15 and the opening of a flow rate regulating valve 10 is regulated to discharge surplus water through a bypass pipe 9 in a diversion tank or a diversion channel 8. This enables a water level in the water supply tank or the storage reservoir 1 to be held about at a specified value, resulting in the possibility to prevent the water supply tank 1 from overflowing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to hydroelectric power generation equipment, and particularly to a hydropower generation equipment that can adjust the amount of water flowing into a water tank in accordance with the load.

[Prior art]

In hydroelectric power generation facilities, as the load on the water turbine connected to the generator and the flow rate of the water turbine decrease, the amount of water flowing from the water tank or reservoir into the water turbine through the penstock decreases, and the water flows from the waterway into the water tank or reservoir. It is known that the amount of water flowing into the water tank is excessive, and for this reason, conventionally, the excess water flowing from the water tank over the overflow base was discharged into a spillway that was installed separately from the penstock to the turbine. There is.

However, with this method of installing a spillway separate from the penstock to the water turbine just to release surplus water from the water tank or reservoir, in addition to the original hydroelectric power generation equipment,
Not only is the installation cost of the spillway itself high, but the
Maintenance such as removal of the four leaves was also expensive and undesirable.

[Problem that the invention seeks to solve]

The purpose of this invention is to solve these conventional problems by making it possible to maintain the same amount of water flowing into the water tank or reservoir as possible and the amount of water flowing through the penstock. The purpose is to prevent overflow from a water tank or reservoir, thereby eliminating the need for a spillway.

[Means for solving problems]

That is, in this invention, a bypass pipe is provided that is branched from the penstock and opens into the discharge channel, and the water level and reference water level of the water tank or reservoir, or the water pressure in the penstock and the reference water pressure are connected to the pipeline of the bypass pipe. A flow rate regulating valve whose opening degree is adjusted according to the deviation from the flow rate regulating valve is interposed, and by adjusting the interlayer of this flow rate regulating valve, excess water is discharged from the bypass pipe to the water discharge tank or water discharge channel. be.

〔Example〕

An embodiment of the hydroelectric power generation equipment according to the present invention will be described in detail below with reference to FIGS. 1 and 2.

FIG. 1 is an explanatory diagram showing the outline of a hydroelectric power generation facility to which this embodiment is applied. In this NS1 diagram, the water tank or reservoir 1 that stores water that flows in from the water source as appropriate has:
A water level gauge 2 that detects the water level and outputs a signal is provided, and water stored in this water tank or reservoir 1 is guided to a water wheel 4 with a predetermined head by a penstock 3, and is As shown in FIG. 2, the flow rate is adjusted by the operation control of the guide vane 5 provided in the introduction part by the servo motor 6 to rotate the water wheel 4, and a generator (not shown) connected to the water wheel 4 is driven. After obtaining the electricity generation power for the period,
Water is discharged from the water discharge pipe 7 into a water discharge tank or a water discharge channel 8.

In this embodiment, in the above structure, a bypass pipe 9 is provided which is branched from the penstock pipe 3 and opened to the discharge channel 8, and the bypass pipe 9 has a flow rate that is opened and closed by a motor 11. A regulating valve 10 is interposed,
A control device 12 is used to control the operation of the bracket motor 11, and as shown in FIG. The comparator 14 manually compares the signals, and the comparison output, that is, the output corresponding to the deviation between the reference water level signal and the detected water level signal, is given to the motor drive circuit 15.
The opening of the flow rate regulating valve 1o is adjusted.

Therefore, in the case of hydroelectric power generation equipment with this embodiment configuration,
By setting a reference water level in advance for the reference value setting ii3, the reference water level signal from this reference value setting device 13 and the water level signal detected by the water level gauge 2 of the water tank or reservoir 1 can be compared. The output corresponding to the 4M difference is used to control the opening degree of the flow rate regulating valve 1o through the motor drive circuit 15, and thus the bypass flow rate passing through the bypass pipe 9. This makes it possible to make the amount of mercury flowing into the water tank or reservoir 1 and the amount of water flowing through the penstock 3 as equal as possible.

In the embodiment described above, bypass meteor control is performed by the flow rate regulating valve 10 of the bypass pipe 9 based on the water level signal of the water tank or reservoir 1, but by detecting the water pressure in the penstock 3, Of course, a similar bypass meteor control may be performed based on the comparison output between the detected water pressure and a preset reference water pressure.

〔Effect of the invention〕

As described in detail above, according to the present invention, in a hydroelectric power generation facility, a bypass pipe is branched from a penstock pipe and opened to a water tank or waterway, and the water level of the water tank or reservoir is connected to the water level of the water tank or reservoir and the standard. A flow rate adjustment valve whose opening is adjusted according to the water level or the deviation between the water pressure in the penstock and the standard water pressure is interposed, and by adjusting the opening of this flow rate adjustment valve, excess water is transferred from the bypass pipe to the water discharge tank or By discharging the water into the tailrace channel, even when the load on the turbine decreases, the amount of water flowing into the water tank or reservoir can be made as much as possible as the amount of water flowing through the penstock, which will reduce the amount of water flowing through the penstock. It is possible to maintain the water level in a water tank or reservoir at a constant constant, and prevent overflow from it.
As a result, this overflow prevention eliminates the need to install a spillway, reducing equipment costs for the entire equipment configuration, and also eliminates the need for maintenance, resulting in extremely effective hydraulic power generation. can be easily realized.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an outline of an embodiment of the hydroelectric power generation equipment according to the present invention, and FIG. 2 is a block diagram showing the circuit structure of the control device. 1...Water tank or reservoir, 2...Water level gauge, 3
... Penstock, 4 ... - water wheel, 5 ... guide vane, 7 ... water discharge pipe, 8 ... water tank or water discharge channel, 9 ..., hay pass pipe, 10...Flow rate adjustment valve, 11...Motor, 12...Motor control device, 13...Reference value setter, 14...Comparator,
15...Motor drive circuit.

Claims (1)

[Claims] (1) Water stored in a water tank or reservoir is led to a water wheel through a penstock, the flow rate is adjusted by a guide vane provided at the introduction part to rotate the water wheel, and a generator connected to this water wheel is driven to achieve the desired output. In hydroelectric power generation equipment that discharges water into a water tank or waterway after generating electricity, a bypass pipe is provided that branches from the penstock and opens into the waterway, and a bypass pipe is installed in the pipeline of the bypass pipe. A flow rate adjustment valve whose opening is adjusted according to the deviation between the water level of the water tank or reservoir and the reference water level, or between the water pressure in the penstock and the reference water pressure is interposed, and by adjusting the opening of the flow rate adjustment valve. A hydroelectric power generation facility characterized in that surplus water is discharged from the bypass pipe to the water discharge tank or water discharge channel.