SE438579B - Apparat for att avgiva en signal indikativ for nervaron av undersynkron strom flytande i ett elektriskt kraftsystem - Google Patents
Apparat for att avgiva en signal indikativ for nervaron av undersynkron strom flytande i ett elektriskt kraftsystemInfo
- Publication number
- SE438579B SE438579B SE7714957A SE7714957A SE438579B SE 438579 B SE438579 B SE 438579B SE 7714957 A SE7714957 A SE 7714957A SE 7714957 A SE7714957 A SE 7714957A SE 438579 B SE438579 B SE 438579B
- Authority
- SE
- Sweden
- Prior art keywords
- signal
- synchronous
- frequency
- component
- sub
- Prior art date
Links
- 230000001360 synchronised effect Effects 0.000 claims description 20
- 238000012545 processing Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 3
- 238000010248 power generation Methods 0.000 claims description 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 230000001629 suppression Effects 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010358 mechanical oscillation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
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
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Filters And Equalizers (AREA)
- Measurement Of Current Or Voltage (AREA)
- Emergency Protection Circuit Devices (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 |
|---|---|
| SE7714957L SE7714957L (sv) | 1978-07-07 |
| SE438579B true SE438579B (sv) | 1985-04-22 |
Family
ID=25046714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7714957A SE438579B (sv) | 1977-01-06 | 1977-12-30 | Apparat for att avgiva en signal indikativ for nervaron av undersynkron strom flytande i ett elektriskt kraftsystem |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US4125884A (en:Method) |
| JP (1) | JPS5385352A (en:Method) |
| AR (1) | AR213989A1 (en:Method) |
| AU (1) | AU515422B2 (en:Method) |
| BR (1) | BR7800018A (en:Method) |
| DE (1) | DE2800067A1 (en:Method) |
| ES (1) | ES465823A1 (en:Method) |
| FR (1) | FR2377108A1 (en:Method) |
| GB (1) | GB1599131A (en:Method) |
| IN (1) | IN149274B (en:Method) |
| IT (1) | IT1104439B (en:Method) |
| MX (1) | MX144248A (en:Method) |
| SE (1) | SE438579B (en:Method) |
| YU (1) | YU40502B (en:Method) |
Families Citing this family (13)
| 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 |
| US4451777A (en) * | 1981-09-10 | 1984-05-29 | Westinghouse Electric Corp. | Static VAR generation for transmission line compensation |
| US4438386A (en) | 1981-09-10 | 1984-03-20 | Westinghouse Electric Corp. | Static VAR generation for transmission line compensation of subsynchronous resonance |
| AU557496B2 (en) * | 1981-09-10 | 1986-12-24 | Westinghouse Electric Corporation | Static var generator |
| 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 BR BR7800018A patent/BR7800018A/pt unknown
- 1978-01-03 AU AU32137/78A patent/AU515422B2/en not_active Expired
- 1978-01-04 IT IT4150378A patent/IT1104439B/it active
- 1978-01-05 AR AR27064278A patent/AR213989A1/es active
- 1978-01-05 ES ES465823A patent/ES465823A1/es not_active Expired
- 1978-01-05 YU YU1278A patent/YU40502B/xx unknown
- 1978-01-05 GB GB323/78A patent/GB1599131A/en not_active Expired
- 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 |
|---|---|
| FR2377108A1 (fr) | 1978-08-04 |
| FR2377108B1 (en:Method) | 1981-11-27 |
| AU3213778A (en) | 1979-07-12 |
| GB1599131A (en) | 1981-09-30 |
| IN149274B (en:Method) | 1981-10-17 |
| US4125884A (en) | 1978-11-14 |
| SE7714957L (sv) | 1978-07-07 |
| BR7800018A (pt) | 1978-12-05 |
| JPS5385352A (en) | 1978-07-27 |
| DE2800067A1 (de) | 1978-07-20 |
| AR213989A1 (es) | 1979-04-11 |
| YU1278A (en) | 1982-08-31 |
| IT1104439B (it) | 1985-10-21 |
| IT7841503A0 (it) | 1978-01-04 |
| JPS5627057B2 (en:Method) | 1981-06-23 |
| ES465823A1 (es) | 1979-01-01 |
| YU40502B (en) | 1986-02-28 |
| AU515422B2 (en) | 1981-04-02 |
| MX144248A (es) | 1981-09-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |
Ref document number: 7714957-3 Effective date: 19920704 Format of ref document f/p: F |