GB2159963B - Measuring rate of change of frequency - Google Patents
Measuring rate of change of frequencyInfo
- 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
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)
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)
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 |
-
1984
- 1984-05-19 GB GB848412856A patent/GB8412856D0/en active Pending
-
1985
- 1985-04-26 GB GB08510696A patent/GB2159963B/en not_active Expired
- 1985-04-26 GB GB08510695A patent/GB2159010B/en not_active Expired
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 |