GB2159963B - Measuring rate of change of frequency - Google Patents

Measuring rate of change of frequency

Info

Publication number
GB2159963B
GB2159963B GB08510696A GB8510696A GB2159963B GB 2159963 B GB2159963 B GB 2159963B GB 08510696 A GB08510696 A GB 08510696A GB 8510696 A GB8510696 A GB 8510696A GB 2159963 B GB2159963 B GB 2159963B
Authority
GB
United Kingdom
Prior art keywords
frequency
change
measuring rate
measuring
rate
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
GB08510696A
Other versions
GB2159963A (en
GB8510696D0 (en
Inventor
John William Warin
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.)
Rolls Royce Power Engineering PLC
Original Assignee
Northern Engineering Industries PLC
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 Northern Engineering Industries PLC filed Critical Northern Engineering Industries PLC
Publication of GB8510696D0 publication Critical patent/GB8510696D0/en
Publication of GB2159963A publication Critical patent/GB2159963A/en
Application granted granted Critical
Publication of GB2159963B publication Critical patent/GB2159963B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
    • G01R23/15—Indicating that frequency of pulses is either above or below a predetermined value or within or outside a predetermined range of values, by making use of non-linear or digital elements (indicating that pulse width is above or below a certain limit)
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)
  • Control Of Eletrric Generators (AREA)
GB08510696A 1984-05-19 1985-04-26 Measuring rate of change of frequency Expired GB2159963B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB848412856A GB8412856D0 (en) 1984-05-19 1984-05-19 Frequency detection

Publications (3)

Publication Number Publication Date
GB8510696D0 GB8510696D0 (en) 1985-06-05
GB2159963A GB2159963A (en) 1985-12-11
GB2159963B true GB2159963B (en) 1987-08-12

Family

ID=10561220

Family Applications (3)

Application Number Title Priority Date Filing Date
GB848412856A Pending GB8412856D0 (en) 1984-05-19 1984-05-19 Frequency detection
GB08510696A Expired GB2159963B (en) 1984-05-19 1985-04-26 Measuring rate of change of frequency
GB08510695A Expired GB2159010B (en) 1984-05-19 1985-04-26 Protecting alternators in electricity supply systems

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB848412856A Pending GB8412856D0 (en) 1984-05-19 1984-05-19 Frequency detection

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB08510695A Expired GB2159010B (en) 1984-05-19 1985-04-26 Protecting alternators in electricity supply systems

Country Status (1)

Country Link
GB (3) GB8412856D0 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0404779B1 (en) * 1988-03-15 1993-06-02 Siemens Aktiengesellschaft Process for stabilizing an oscillatory electrical supply network
JP2730595B2 (en) * 1989-08-21 1998-03-25 株式会社 四国総合研究所 Grid connection equipment for small power generators
JPH03256533A (en) * 1990-03-02 1991-11-15 Shikoku Sogo Kenkyusho:Kk System linkage system
GB2370702B (en) * 2000-09-19 2003-07-09 Toshiba Kk Line linkage protective device for electricity generation equipment
GB0102212D0 (en) * 2001-01-29 2001-03-14 Lattice Intellectual Property Controller
ES2428240B1 (en) 2012-05-03 2015-03-10 Gamesa Innovation & Tech Sl Method and Module to measure the frequency change rate of the waveforms related to the wind turbine converter units

Also Published As

Publication number Publication date
GB8412856D0 (en) 1984-06-27
GB2159010B (en) 1987-04-23
GB2159963A (en) 1985-12-11
GB2159010A (en) 1985-11-20
GB8510695D0 (en) 1985-06-05
GB8510696D0 (en) 1985-06-05

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 20050425