Hydroelectric power generation system

Patent metadata

Field	Value
Publication number	US-11041476-B2
Application number	US-201716332430-A
Country	US
Kind code	B2
Filing date	Sep 11, 2017
Priority date	Sep 20, 2016
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

An electric power information acquisition unit is provided for acquiring power supply-and-demand information including electric power acceptable to an electric power system or information correlated with the electric power. A fluid information acquisition unit is provided for acquiring fluid information including information correlated with a physical quantity of a fluid flowing out of a channel. A controller is provided for controlling at least one of the physical quantity, the channel or electric power generated or electric power to be generated by a generator by using the fluid information so that the physical quantity becomes equal to a desired value, while controlling electric power to be supplied to the electric power system to the electric power acceptable to the electric power system or less, by using the power supply-and-demand information.

First claim

The invention claimed is:

1. A hydroelectric power generation system comprising:
a fluid machine arranged in a channel through which a fluid flows;
a generator driven by the fluid machine;
a controller configured to control at least one of electric power generated or electric power to be generated by the generator and to supply electric power generated by the generator to an electric power system;
an electric power information acquisition unit configured to acquire power supply-and-demand information, the power supply-and-demand information including electric power acceptable to an electric power system or information correlated with the electric power;
a fluid information acquisition unit configured to acquire fluid information including information correlated with a physical quantity of the fluid flowing out of the channel,
wherein the controller controls at least one of the physical quantity, the channel, an electric power generated or an electric power to be generated by the generator by using the fluid information so that the physical quantity becomes equal to a desired value, while controlling electric power to be supplied to the electric power system to the electric power acceptable to the electric power system or less based on the acquired power supply-and-demand information,
wherein the controller estimates a flow rate and an effective head in the fluid machine based on a detectable characteristic that is related to the generator and correlated with the flow rate and the effective head in the fluid machine, and estimates the total flow rate based on a flow resistance characteristic line representing a relation between the effective head and the total flow rate in the channel, the flow rate which has been estimated, and the effective head which has been estimated.

2. The hydroelectric power generation system of claim 1 , wherein
the channel is provided with a bypass channel bypassing the fluid machine,
the physical quantity includes a total flow rate of the fluid in the channel, and
the controller controls a flow rate of the fluid in the bypass channel so as to cause the total flow rate to approach a predetermined target total flow rate.

3. The hydroelectric power generation system of claim 1 , wherein
the channel is a pipe, and is provided with a flow rate control valve connected in series to the fluid machine and controlling a flow rate of the fluid flowing into the fluid machine,
a value of the physical quantity includes a pressure of the fluid flowing out of the channel, and
the controller controls a degree of opening of the flow rate control valve so as to cause the pressure to approach a predetermined target pressure.

4. The hydroelectric power generation system of claim 1 , wherein the controller acquires the power supply-and-demand information based on a voltage value of a distribution line of the electric power system.

5. The hydroelectric power generation system of claim 1 , further comprising:
a power consumption unit configured to consume the generated electric power, wherein
the controller supplies part or all of the generated electric power to the power consumption unit so that the electric power to be supplied to the electric power system becomes equal to a desired value.

6. The hydroelectric power generation system of claim 1 , wherein the controller controls a flow rate in the fluid machine so that the electric power to be supplied to the electric power system becomes equal to a desired value.

7. The hydroelectric power generation system of claim 3 , wherein the controller controls the at least one of electric power generated or electric power to be generated while controlling the degree of opening of the flow rate control valve so that the electric power to be supplied to the electric power system becomes equal to a desired value.

8. The hydroelectric power generation system of claim 2 , wherein the controller estimates a flow rate and an effective head in the fluid machine based on a detectable characteristic that is related to the generator and correlated with the flow rate and the effective head in the fluid machine, and estimates the total flow rate based on a flow resistance characteristic line representing a relation between the effective head and the total flow rate in the channel, the flow rate which has been estimated, and the effective head which has been estimated.

9. The hydroelectric power generation system of claim 4 , further comprising:
a power consumption unit configured to consume the generated electric power, wherein
the controller supplies part or all of the generated electric power to the power consumption unit so that the electric power to be supplied to the electric power system becomes equal to a desired value.

10. The hydroelectric power generation system of claim 4 , wherein the controller controls a flow rate in the fluid machine so that the electric power to be supplied to the electric power system becomes equal to a desired value.

Assignees

• Daikin Ind Ltd

Inventors

• Abe Takahiro
• Suhara Atsushi
• Yokoyama Takahiro

Classifications

• H02J2101/00

  Supply or distribution of decentralised, dispersed or local electric power generation · CPC title

• H02J3/381

  Dispersed generators · CPC title

• F05B2220/20

  within closed fluid conduits, e.g. pipes · CPC title

• F03B13/08 Primary

  Machine or engine aggregates in dams or the like; Conduits therefor {, e.g. diffusors (bulb groups F03B13/105)} · CPC title

• H02K7/1823 Primary

  structurally associated with turbines or similar engines · CPC title