JPS54115745A - Distance relay - Google Patents
Distance relayInfo
- Publication number
- JPS54115745A JPS54115745A JP2212278A JP2212278A JPS54115745A JP S54115745 A JPS54115745 A JP S54115745A JP 2212278 A JP2212278 A JP 2212278A JP 2212278 A JP2212278 A JP 2212278A JP S54115745 A JPS54115745 A JP S54115745A
- Authority
- JP
- Japan
- Prior art keywords
- limiter
- voltage
- circuit
- multiplier
- higher harmonics
- 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 reduce the influence of higher harmonics by connecting a limiter circuit and a bandpass filter between the first signal converting circuit for taking the voltage information and a memory and between a substractor and a decision circuit.
CONSTITUTION: Voltage and current informations are taken from the transmission line system to supply the voltage and current signals through the signal converting circuits 1 and 2 to the substractor 3 and the limiter 9. Then the output from the subtractor 3 is cut off at the limiter 8 and supplied through the filter 10 to the multiplier 5. While in the voltage circuit, the signal cut off at the limiter 9 is supplied through the filter 11 and memory 4 to the multiplier 5 to perform the decision of fault. Since the multiplier 5 never operate the higher harmonics lapped over the basic wave, the influence of the higher harmonics can be eliminated.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2212278A JPS54115745A (en) | 1978-03-01 | 1978-03-01 | Distance relay |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2212278A JPS54115745A (en) | 1978-03-01 | 1978-03-01 | Distance relay |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54115745A true JPS54115745A (en) | 1979-09-08 |
Family
ID=12074067
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2212278A Pending JPS54115745A (en) | 1978-03-01 | 1978-03-01 | Distance relay |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54115745A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5956817A (en) * | 1982-09-22 | 1984-04-02 | 三菱電機株式会社 | Distance relay |
JPS5970121A (en) * | 1982-10-13 | 1984-04-20 | 三菱電機株式会社 | Distance relay |
JPS5983531A (en) * | 1982-11-01 | 1984-05-15 | 三菱電機株式会社 | Distance relay |
-
1978
- 1978-03-01 JP JP2212278A patent/JPS54115745A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5956817A (en) * | 1982-09-22 | 1984-04-02 | 三菱電機株式会社 | Distance relay |
JPS5970121A (en) * | 1982-10-13 | 1984-04-20 | 三菱電機株式会社 | Distance relay |
JPS5983531A (en) * | 1982-11-01 | 1984-05-15 | 三菱電機株式会社 | Distance relay |
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