JPS5862378A - Hydraulic power generating system in multistage dam - Google Patents

Abstract

PURPOSE:To permit the amount of power generation in each dam always to be maintained at the amount of power generation in case of the max. flow rate by permitting the water pumping-up function to be provided between dams and permitting the repetive utilization of the flowing water through pumping-up. CONSTITUTION:Hydraulic conduits 7 and 8, power plants 10 and 11, surge chambers 13 and 14, and flood control channels 15 and 16 are constructed respectively between reservoirs 1 and 2 and between reservoirs 2 and 3. As the electric motor for pumping-up water from the reservoir 2 or 3 to the reservoir 1 or 2 through the flood control channel and the hydraulic conduit and the water wheel-power generator for power generation are installed in each power plant 10, 11, the flowing water can be utilized repetively through pumping-up water, and the amount of power generation in each dam can be maintained at the amount of power generation in case of the max. flow rate.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydroelectric power generation system, and particularly to a power generation system characterized by a multi-stage dam provided with a pumping function.

The conventional Q Dam 2 power generation system uses a dam built across a river to raise the water level in the reservoir to obtain a head difference, and it is unavoidable that one tilt of the generation increases by Km due to fluctuations in the natural inflow of water into the reservoir. , leading to a decline in equipment operating rates. Figure 1 schematically shows the change in flow rate after rainfall. Although it depends on the amount of rainfall, in general, inflow water with a volume of 2 or more corresponding to the maximum power generation amount is not used for power generation and is left as it is. The constant output is only for the female turtle, which corresponds to the steady FllR, but the amount of water F corresponding to the Unagi University Power Generation Award can be used for 1 week to 10 days after rain. F-R7) The reality is that power generation facilities that are in conflict with each other have to be shut down.In an attempt to use two or more wasteful inflows for power generation, the amount of power generated is increased, and F-R7) ′■If you install power generation equipment that can handle the amount of water,
If the difference between the output and the regular output is large, the result will only be a wasteful reduction in investment efficiency.

Therefore, if by some means we could always secure enough water to handle the massive amount of power generated, it would not only be possible to increase the operating rate of the power generation equipment, but also increase the maximum amount of power generation to correspond to the amount of water F'. On the other hand, it is possible to increase the utilization rate of rainfall υ by increasing the rainfall υ utilization rate.C On the other hand, pumped storage power generation, which responds to fluctuations in electricity demand* such as 0-day weekly periods and yearly periods, and utilizes surplus power at night, etc.
frO41! ! Although crotch is desired, generally speaking, an upper pond, a lower pond, and a reservoir are required for this purpose. Large capacity 1
It is becoming difficult to find suitable construction sites that will make pumped storage power generation possible. On the other hand, the need for large-capacity water power generation (1) is increasing as the construction of large-capacity power plants that are sensitive to load fluctuations, such as thermal power and nuclear power generation, is increasing. There is.

This invention was developed in order to make full use of the embedded hydraulic power.1) In a multi-stage dam VC built along a river, the power plant's tailrace provided in the upper dam and the lower υ dam Taking advantage of the fact that there is almost no difference in elevation between ゛water at both times■ and 0, 1) installation of pumping pipes and pumps between the lower dams (with a - mark to have the function of a pumped storage power plant, By making sure that the dam is equipped with a flow device that always responds to the maximum flow rate, we can dramatically improve power generation efficiency and at the same time reduce the cost of pumped storage power generation, which has become 7% more expensive. The aim is to make use of the existing O dam through investment and enable it to be used at many υ points.

Next, the invention (7) will be explained based on the drawings. Demonstration of m things, dam 4.5. By constructing reservoirs 1, 2, and 6, reservoirs 1, 2, and 3 are formed from the upper fL side of the river. Between reservoir 1 and reservoir 2, and between reservoir 2 and reservoir 3. In between, there are penstocks 7 and 8, power plants 1 () and 11, surge chambers 13 and 14, and tailrace tunnel 1, respectively.
0 each power plant 10 and 11 where 5 and 16 are being built
In addition, there is a pump electric +l for pumping water from the reservoir 2 and 3 to the reservoir 11 and Vi2 via the tailrace tunnel and the penstock.
k! 7m and a υ water turbine generator is installed for power generation υ.

Also, like a normal pumped storage power plant in the area, the pump and water wheel O
A pump having both functions may be directly connected to a generator. Installing a separate pump motor for pumping water is a good method when modifying an existing power plant to provide pumping capacity: #Q-. In addition, for pumped water 'n**,
Instead of using the hydraulic line 7.8, a separate lift pipe may be provided.

FIG. 3 schematically shows the daily load curve.

Demand fluctuations are noticeable not only during the day and night, but also during the hour during the day, and in order to pump water effectively with surplus electricity for such a short period of time, it is necessary to use a large-capacity water pump. . In order to do this, the Bonso Arashikanki must be installed separately from the generator.
In some cases, it is preferable to separately install up to the pumping pipe (l/)c. A 12V power plant installed in the reservoir 3 at the lowest stream 11. In this case, a water turbine generator without a pumping function is installed. . In this case, the water level of the most downstream dam fluctuates due to water discharge and pumping due to power generation, and it is difficult to maintain a constant υ output, but the steady flow flowing into the dam upstream of the eel, Vilt, is Therefore, there is no particular decrease in the yield compared to the conventional method (1. It will be available for use.

The switching of these generators to new group vvh water 1 power generation can be automatically controlled based on the generation wIL wrinkle of each dam, the water level of the dam, and the power supply requirement.As explained above, this invention When developing hydropower using multi-stage dams, by providing a pumping function between each dam, the sewage water is pumped up and used repeatedly, and the power generation amount of each dam is maintained at the maximum flow rate. By doing so, it will be possible to dramatically improve the investment efficiency of power generation installations and expand the scope of application of pumped storage power generation technology not only to reduce peak power supply but also to a constant source of power. Moreover, it can be applied to existing dams with simple modification, so it can be used instead of pumped storage power generation, which is strongly desired to be expanded. It's the same as O, which built a large number of hot water sources without constructing dams, which accounted for 80 cents of construction costs! ! It provides an innovative shipping method that has not been found in conventional υ power generation systems, such as being able to produce young fruits.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram showing changes in running water, Figure 2 is a diagram showing an example of the invention Q power generation system, and Figure 3 is a schematic diagram showing daily changes in electric power. .2 and 3: Reservoirs 4, 5, and 6: Dams 7.8
, and 9: Penstock line 10.11 and 12: Departure fL station
13 and 14: Surgical Ember 15 and 16: Spillway Tunnel 17.18 and 19: Headrace Tunnel 2
0.21. and 22: Surge absorption tank patent release ceremony
Timber Washer Japan Science Foundation Applicant Agent Patent Attorney Fumi Sato (and 1 other person) Figure 3-11-A Time

Claims (1)

[Claims] 1) Hydroelectric power generation system 2 in a multi-stage dam characterized by having a function of pumping water from a lower reservoir to an upper reservoir in a plurality of dam-type power plants sequentially installed along a river. ) A hydroelectric power generation method using a multistage dam that is equipped with pumping equipment such as a pump or TRI pump in addition to the existing multistage dam power generation equipment.