GB8510696D0 - Electricity supplies - Google Patents

Electricity supplies

Info

Publication number
GB8510696D0
GB8510696D0 GB858510696A GB8510696A GB8510696D0 GB 8510696 D0 GB8510696 D0 GB 8510696D0 GB 858510696 A GB858510696 A GB 858510696A GB 8510696 A GB8510696 A GB 8510696A GB 8510696 D0 GB8510696 D0 GB 8510696D0
Authority
GB
United Kingdom
Prior art keywords
electricity supplies
supplies
electricity
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.)
Granted
Application number
GB858510696A
Other versions
GB2159963B (en
GB2159963A (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.)
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)
  • Control Of Eletrric Generators (AREA)
  • Measuring Frequencies, Analyzing Spectra (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 true GB8510696D0 (en) 1985-06-05
GB2159963A GB2159963A (en) 1985-12-11
GB2159963B 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
GB08510695A Expired GB2159010B (en) 1984-05-19 1985-04-26 Protecting alternators in electricity supply systems
GB08510696A Expired GB2159963B (en) 1984-05-19 1985-04-26 Measuring rate of change of frequency

Family Applications Before (2)

Application Number Title Priority Date Filing Date
GB848412856A Pending GB8412856D0 (en) 1984-05-19 1984-05-19 Frequency detection
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
DE58904574D1 (en) * 1988-03-15 1993-07-08 Siemens Ag METHOD FOR STABILIZING AN VIBRATING 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
US6738269B2 (en) 2000-09-19 2004-05-18 Kabushiki Kaisha Toshiba 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
GB2159010A (en) 1985-11-20
GB2159963B (en) 1987-08-12
GB8510695D0 (en) 1985-06-05
GB2159963A (en) 1985-12-11

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Legal Events

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

Effective date: 20050425