JPS54101143A - Protective relay - Google Patents
Protective relayInfo
- Publication number
- JPS54101143A JPS54101143A JP793678A JP793678A JPS54101143A JP S54101143 A JPS54101143 A JP S54101143A JP 793678 A JP793678 A JP 793678A JP 793678 A JP793678 A JP 793678A JP S54101143 A JPS54101143 A JP S54101143A
- Authority
- JP
- Japan
- Prior art keywords
- change
- frequency
- stabilizing
- measure
- detected
- 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
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE: To permit quick detection of a change of the frequency of the system at the time of occurrence of such a change so as to detect a trouble causing such a change for permitting a measure for stabilizing the system to be taken.
CONSTITUTION: A frequency change is detected by sampling the voltage of the systems N time each for one period of the fundamental frequency, converting the sampled values into N digital values and determining whether the value obtained by successively adding the N sampled values is zero or not. When a frequency change is detected, th system is determined to be in trouble, and a measure for stabilizing the system is taken up.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP793678A JPS54101143A (en) | 1978-01-26 | 1978-01-26 | Protective relay |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP793678A JPS54101143A (en) | 1978-01-26 | 1978-01-26 | Protective relay |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54101143A true JPS54101143A (en) | 1979-08-09 |
Family
ID=11679389
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP793678A Pending JPS54101143A (en) | 1978-01-26 | 1978-01-26 | Protective relay |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54101143A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6314378B1 (en) | 1996-04-01 | 2001-11-06 | Clc Global Llc | Distributed frequency relay |
-
1978
- 1978-01-26 JP JP793678A patent/JPS54101143A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6314378B1 (en) | 1996-04-01 | 2001-11-06 | Clc Global Llc | Distributed frequency relay |
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