Hydroelectric system

Patent metadata

Field	Value
Publication number	US-11035337-B2
Application number	US-201816645685-A
Country	US
Kind code	B2
Filing date	Sep 11, 2018
Priority date	Sep 29, 2017
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

A hydroelectric generation system includes a fluid machine disposed in a penstock or channel, a generator driven by the fluid machine, and a control unit configured to generate a predetermined torque in the generator. Fluid flows through the penstock or channel. The penstock or channel has a main path in which the fluid machine is disposed, and a detour disposed in parallel with the main path. The detour includes an on-off valve. The on-off valve is opened when not electrified, and closed when electrified.

First claim

What is claimed is:

1. A hydroelectric generation system comprising:
a fluid machine disposed in a penstock or channel, the penstock or channel being configured for fluid to flow therethrough;
a generator driven by the fluid machine; and
a control unit configured to generate a predetermined torque in the generator; and
an abnormality detector configured to detect an abnormality in the hydroelectric generation system,
the penstock or channel having
a main path in which the fluid machine is disposed, and
a detour disposed in parallel with the main path,

the detour including a detour on-off valve, the detour on-off valve being opened when not electrified, and the detour on-off valve being closed when electrified,
upon the abnormality detector detecting the abnormality when the detour on-off valve is electrified, electrification of the detour on-off valve is stopped,
the abnormality detector detecting an abnormality based on an effective head of the fluid machine, the effective head being a difference between a first pressure at a fluid inflow port of the work machine and a second pressure at a fluid outflow port of the work machine.

2. The hydroelectric generation system of claim 1 , wherein
the main path includes a main on-off valve, the main on-off valve is closed when not electrified, and the main on-off valve is opened when electrified, and
the detour includes an adjuster configured to mechanically adjust a pressure or a flow rate of the fluid.

3. The hydroelectric generation system of claim 1 , wherein
the penstock or channel has an outflow pipe disposed downstream of the main path and the detour such that the main path and the detour are joined together, and
the outflow pipe includes an adjuster configured to mechanically adjust a pressure or a flow rate of the fluid.

Assignees

• Daikin Ind Ltd

Inventors

• Abe Takahiro
• Suhara Atsushi
• Harada Yoshiyuki
• Sakamoto Tomomi
• Irino Yusuke

Classifications

• Y02E10/20

  Hydro energy · CPC title

• F03B15/04 Primary

  of turbines (rotors having adjustable blades F03B3/06, F03B3/14; adjustable guide vanes F03B3/18; specially adapted for turbines with jets of high-velocity liquid impinging on bladed or like rotors F03B15/20) · CPC title

• F03B15/06 Primary

  Regulating, i.e. acting automatically · CPC title

• H02P9/04

  Control effected upon non-electric prime mover and dependent upon electric output value of the generator · CPC title

• F05B2270/107

  to cope with emergencies · CPC title