GB1599131A - Apparatus for detecting subsynchronous current in power systems - Google Patents

Apparatus for detecting subsynchronous current in power systems Download PDF

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Publication number
GB1599131A
GB1599131A GB323/78A GB32378A GB1599131A GB 1599131 A GB1599131 A GB 1599131A GB 323/78 A GB323/78 A GB 323/78A GB 32378 A GB32378 A GB 32378A GB 1599131 A GB1599131 A GB 1599131A
Authority
GB
United Kingdom
Prior art keywords
signal
frequency
synchronous
subsynchronous
component
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.)
Expired
Application number
GB323/78A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1599131A publication Critical patent/GB1599131A/en
Expired legal-status Critical Current

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

  • 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)
  • Emergency Protection Circuit Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)
GB323/78A 1977-01-06 1978-01-05 Apparatus for detecting subsynchronous current in power systems Expired GB1599131A (en)

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 (1)

Publication Number Publication Date
GB1599131A true GB1599131A (en) 1981-09-30

Family

ID=25046714

Family Applications (1)

Application Number Title Priority Date Filing Date
GB323/78A Expired GB1599131A (en) 1977-01-06 1978-01-05 Apparatus for detecting subsynchronous current in power systems

Country Status (14)

Country Link
US (1) US4125884A (US08177716-20120515-C00003.png)
JP (1) JPS5385352A (US08177716-20120515-C00003.png)
AR (1) AR213989A1 (US08177716-20120515-C00003.png)
AU (1) AU515422B2 (US08177716-20120515-C00003.png)
BR (1) BR7800018A (US08177716-20120515-C00003.png)
DE (1) DE2800067A1 (US08177716-20120515-C00003.png)
ES (1) ES465823A1 (US08177716-20120515-C00003.png)
FR (1) FR2377108A1 (US08177716-20120515-C00003.png)
GB (1) GB1599131A (US08177716-20120515-C00003.png)
IN (1) IN149274B (US08177716-20120515-C00003.png)
IT (1) IT1104439B (US08177716-20120515-C00003.png)
MX (1) MX144248A (US08177716-20120515-C00003.png)
SE (1) SE438579B (US08177716-20120515-C00003.png)
YU (1) YU40502B (US08177716-20120515-C00003.png)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4218718A (en) * 1978-11-08 1980-08-19 Westinghouse Electric Corp. Protective relay apparatus
US4208687A (en) * 1978-11-08 1980-06-17 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
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
EP2357483B1 (en) * 2010-02-17 2013-06-26 ABB Research Ltd. A method of subsynchronous resonance detection
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
FR2377108A1 (fr) 1978-08-04
US4125884A (en) 1978-11-14
DE2800067A1 (de) 1978-07-20
SE438579B (sv) 1985-04-22
ES465823A1 (es) 1979-01-01
JPS5385352A (en) 1978-07-27
SE7714957L (sv) 1978-07-07
IT7841503A0 (it) 1978-01-04
FR2377108B1 (US08177716-20120515-C00003.png) 1981-11-27
AU3213778A (en) 1979-07-12
IT1104439B (it) 1985-10-21
YU1278A (en) 1982-08-31
JPS5627057B2 (US08177716-20120515-C00003.png) 1981-06-23
IN149274B (US08177716-20120515-C00003.png) 1981-10-17
AU515422B2 (en) 1981-04-02
MX144248A (es) 1981-09-17
BR7800018A (pt) 1978-12-05
AR213989A1 (es) 1979-04-11
YU40502B (en) 1986-02-28

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee