Control valve control method and control device, and power generating plant utilizing same

Patent metadata

Field	Value
Publication number	US-9689280-B2
Application number	US-201414333619-A
Country	US
Kind code	B2
Filing date	Jul 17, 2014
Priority date	Jul 17, 2013
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

A gas turbine plant including a gas turbine and a compressor is provided with a steam turbine plant including a steam turbine and a condenser, and, an exhaust heat recovery boiler. Steam from the exhaust heat recovery boiler is directly flown to the condenser of the steam turbine plant through a bypass control valve. A pressure sensor detects pressure in a turbine bypass system. A controller outputs, based on a set value from an input device and a process value from the pressure sensor, an open level instruction value to the control value so as to make the process value consistent with the set value in a predetermined sampling cycle. A corrector corrects the set value from the input device in a direction in which the open level instruction value decreases when the open level instruction value from the controller becomes a value that substantially fully opens the control valve.

First claim

What is claimed is:

1. A power generating plant comprising:
a gas turbine;
an exhaust heat recovery boiler configured to generate steam by using exhaust gas from the gas turbine;
a steam turbine rotated and driven by the steam from the exhaust heat recovery boiler;
a condenser configured to condense an exhausted steam from the steam turbine into water, and supplying condensed water to the exhaust heat recovery boiler;
a turbine bypass system configured to make the steam fl…

Assignees

• Toshiba Kk

Inventors

• Watanabe Hironori
• Tobo Masayuki
• Yamasaki Takuji
• Juangsa Firman Bagja

Classifications

• F01K9/04

  Mechanical Engineering · mapped topic

• F22B1/18

  Mechanical Engineering · mapped topic

• F01K23/10 Primary

  Mechanical Engineering · mapped topic

• F01K23/108

  Mechanical Engineering · mapped topic

• Y02E20/16

  Cross-Sectional Technologies · mapped topic