JPS56504A - Automatic valve switching circuit for steam turbine - Google Patents
Automatic valve switching circuit for steam turbineInfo
- Publication number
- JPS56504A JPS56504A JP7583679A JP7583679A JPS56504A JP S56504 A JPS56504 A JP S56504A JP 7583679 A JP7583679 A JP 7583679A JP 7583679 A JP7583679 A JP 7583679A JP S56504 A JPS56504 A JP S56504A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- opened
- turbine
- valve switching
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Control Of Turbines (AREA)
Abstract
PURPOSE: To enable to effect a valve switchihg without causing an output fluctuation of a generator by a method wherein an output of the generator is detected and is compared with a preset valve switching load signal while a valve controlling portion is controlled automatically by a deviation signal thereof.
CONSTITUTION: When a turbine 5 is actuated until a valve switching load, a contact 18 is opened. On the other hand, steam regulating valves 3, 4 of the turbine 5 are fully opened until the valve switching load and the turbine is controlled by a main steam stop valve 2, therefore, an outlet side steam pressure of the valve 2 becomes lower than an inlet side steam pressure thereof and a pressure difference detector 13 is operated, thereby, contacts 13a, 13b are closed and the same 13c is opened. Accordingly, a closing signal is input into a valve controller 8 and the steam regulating valve 4, 3 are choked in their openings gradually. When the openings thereof become conditions corresponding to the valve switching loads, a pressure difference between fore and aft of the valve 2 is decreased and a detecting pressure of the pressure difference detector 13 becomes lower than a preset value, the contacts 13a, 13b are opened and the same 13c is closed, consequently, the valve 2 is fully opened by the valve controller 7.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7583679A JPS56504A (en) | 1979-06-13 | 1979-06-13 | Automatic valve switching circuit for steam turbine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7583679A JPS56504A (en) | 1979-06-13 | 1979-06-13 | Automatic valve switching circuit for steam turbine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56504A true JPS56504A (en) | 1981-01-07 |
Family
ID=13587668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7583679A Pending JPS56504A (en) | 1979-06-13 | 1979-06-13 | Automatic valve switching circuit for steam turbine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56504A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014227915A (en) * | 2013-05-22 | 2014-12-08 | 株式会社日立製作所 | Turbine control device and turbine control method |
-
1979
- 1979-06-13 JP JP7583679A patent/JPS56504A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014227915A (en) * | 2013-05-22 | 2014-12-08 | 株式会社日立製作所 | Turbine control device and turbine control method |
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