JPS5627057B2 - - Google Patents
Info
- Publication number
- JPS5627057B2 JPS5627057B2 JP30878A JP30878A JPS5627057B2 JP S5627057 B2 JPS5627057 B2 JP S5627057B2 JP 30878 A JP30878 A JP 30878A JP 30878 A JP30878 A JP 30878A JP S5627057 B2 JPS5627057 B2 JP S5627057B2
- Authority
- JP
- Japan
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/46—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to frequency deviations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/18—Indicating phase sequence; Indicating synchronism
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/06—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inverter Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Filters And Equalizers (AREA)
- Emergency Protection Circuit Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/757,177 US4125884A (en) | 1977-01-06 | 1977-01-06 | Apparatus for detecting subsynchronous current in power systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5385352A JPS5385352A (en) | 1978-07-27 |
| JPS5627057B2 true JPS5627057B2 (US06373033-20020416-M00071.png) | 1981-06-23 |
Family
ID=25046714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30878A Granted JPS5385352A (en) | 1977-01-06 | 1978-01-06 | Device for producing signal responsive to low frequency resonant currne flowing in power system |
Country Status (14)
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4208687A (en) * | 1978-11-08 | 1980-06-17 | Westinghouse Electric Corp. | Protective relay apparatus |
| US4218718A (en) * | 1978-11-08 | 1980-08-19 | Westinghouse Electric Corp. | Protective relay apparatus |
| US4331882A (en) * | 1980-03-17 | 1982-05-25 | Electric Power Research Institute, Inc. | Method and means for detecting spurious electrical signals in an electrical power system |
| US4454428A (en) * | 1981-07-22 | 1984-06-12 | Westinghouse Electric Corp. | Noise reduction means for a dynamic stabilizer for synchronous machines having torsional oscillations and method |
| AU557496B2 (en) * | 1981-09-10 | 1986-12-24 | Westinghouse Electric Corporation | Static var generator |
| US4451777A (en) * | 1981-09-10 | 1984-05-29 | Westinghouse Electric Corp. | Static VAR generation for transmission line compensation |
| US4470091A (en) * | 1982-10-20 | 1984-09-04 | Westinghouse Electric Corp. | Productive relay apparatus for protection from sub-synchronous current oscillations in a power system |
| US4607217A (en) * | 1983-09-28 | 1986-08-19 | Southern California Edison Company, Inc. | Subsynchronous resonance detection |
| US4855664A (en) * | 1988-06-10 | 1989-08-08 | General Electric Company | Method and apparatus for damping oscillations of an ac generator |
| US6774614B2 (en) | 2002-02-27 | 2004-08-10 | General Electric Company | Method and apparatus for detecting current |
| ES2425792T3 (es) * | 2010-02-17 | 2013-10-17 | Abb Research Ltd. | Procedimiento de detección de resonancia subsíncrona |
| CN102508027B (zh) * | 2011-09-20 | 2014-05-28 | 南京南瑞继保电气有限公司 | 一种次同步模态信号的筛选分离监测方法 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3654516A (en) * | 1971-04-07 | 1972-04-04 | Westinghouse Electric Corp | Change of current or voltage acutated protecting relay |
| US3886449A (en) * | 1974-03-06 | 1975-05-27 | Gen Electric | Power measurement circuit |
| US3944846A (en) * | 1974-03-19 | 1976-03-16 | Southern California Edison Company | Subsynchronous relay |
| US3999115A (en) * | 1974-05-02 | 1976-12-21 | Westinghouse Electric Corporation | Dynamic stabilizer for synchronous machines having torsional oscillations and method |
| US4001695A (en) * | 1975-03-24 | 1977-01-04 | Systron Donner Corporation | Automatic deviation analysis meter |
-
1977
- 1977-01-06 US US05/757,177 patent/US4125884A/en not_active Expired - Lifetime
- 1977-12-20 IN IN1758/CAL/77A patent/IN149274B/en unknown
- 1977-12-27 FR FR7739349A patent/FR2377108A1/fr active Granted
- 1977-12-30 SE SE7714957A patent/SE438579B/sv not_active IP Right Cessation
-
1978
- 1978-01-02 DE DE19782800067 patent/DE2800067A1/de not_active Withdrawn
- 1978-01-03 AU AU32137/78A patent/AU515422B2/en not_active Expired
- 1978-01-03 BR BR7800018A patent/BR7800018A/pt unknown
- 1978-01-04 IT IT4150378A patent/IT1104439B/it active
- 1978-01-05 GB GB323/78A patent/GB1599131A/en not_active Expired
- 1978-01-05 ES ES465823A patent/ES465823A1/es not_active Expired
- 1978-01-05 YU YU1278A patent/YU40502B/xx unknown
- 1978-01-05 AR AR27064278A patent/AR213989A1/es active
- 1978-01-06 JP JP30878A patent/JPS5385352A/ja active Granted
- 1978-01-06 MX MX171960A patent/MX144248A/es unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2800067A1 (de) | 1978-07-20 |
| IT1104439B (it) | 1985-10-21 |
| IN149274B (US06373033-20020416-M00071.png) | 1981-10-17 |
| YU1278A (en) | 1982-08-31 |
| BR7800018A (pt) | 1978-12-05 |
| MX144248A (es) | 1981-09-17 |
| SE438579B (sv) | 1985-04-22 |
| ES465823A1 (es) | 1979-01-01 |
| GB1599131A (en) | 1981-09-30 |
| JPS5385352A (en) | 1978-07-27 |
| AU3213778A (en) | 1979-07-12 |
| YU40502B (en) | 1986-02-28 |
| IT7841503A0 (it) | 1978-01-04 |
| AR213989A1 (es) | 1979-04-11 |
| FR2377108B1 (US06373033-20020416-M00071.png) | 1981-11-27 |
| SE7714957L (sv) | 1978-07-07 |
| US4125884A (en) | 1978-11-14 |
| AU515422B2 (en) | 1981-04-02 |
| FR2377108A1 (fr) | 1978-08-04 |
