FR2239791A1 - Determination of faults in electrical power transmission links - by monitoring during selected intervals in each half cycle - Google Patents

Determination of faults in electrical power transmission links - by monitoring during selected intervals in each half cycle

Info

Publication number
FR2239791A1
FR2239791A1 FR7423797A FR7423797A FR2239791A1 FR 2239791 A1 FR2239791 A1 FR 2239791A1 FR 7423797 A FR7423797 A FR 7423797A FR 7423797 A FR7423797 A FR 7423797A FR 2239791 A1 FR2239791 A1 FR 2239791A1
Authority
FR
France
Prior art keywords
current
half cycle
faults
determination
derived
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.)
Pending
Application number
FR7423797A
Other languages
French (fr)
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.)
Siemens AG
Original Assignee
Siemens AG
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
Priority claimed from DE19732339932 external-priority patent/DE2339932C3/en
Application filed by Siemens AG filed Critical Siemens AG
Publication of FR2239791A1 publication Critical patent/FR2239791A1/en
Pending 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
    • H02H3/38—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 both voltage and current; responsive to phase angle between voltage and current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/04—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
    • H02H1/046—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks upon detecting saturation of current transformers
    • 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
    • H02H3/38—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 both voltage and current; responsive to phase angle between voltage and current
    • H02H3/382—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 both voltage and current; responsive to phase angle between voltage and current involving phase comparison between current and voltage or between values derived from current and voltage

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Locating Faults (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

The line current (J1) is monitored by a current transformer which, under line fault conditions, may saturate and deliver a distorted output (J2). From this output an auxiliary voltage is derived, by means of unspecified transfer impedances, and the commencement of monitoring periods (t1, t2 ..) derived from its zeros. Preferably the auxiliary voltage is derived by differentiation of the current, such that the zeros are in phase advance of the line current (pref. by about 65 deg., the phase angle of voltage and current at short circuit). A second auxiliary voltage may determine the period length. During at least one period per half cycle faults can be determined by the usual impedance comparison methods.
FR7423797A 1973-08-03 1974-07-09 Determination of faults in electrical power transmission links - by monitoring during selected intervals in each half cycle Pending FR2239791A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732339932 DE2339932C3 (en) 1973-08-03 Method for determining errors on a line section to be monitored of an electrical power supply network

Publications (1)

Publication Number Publication Date
FR2239791A1 true FR2239791A1 (en) 1975-02-28

Family

ID=5889108

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7423797A Pending FR2239791A1 (en) 1973-08-03 1974-07-09 Determination of faults in electrical power transmission links - by monitoring during selected intervals in each half cycle

Country Status (6)

Country Link
JP (1) JPS5044437A (en)
CH (1) CH579841A5 (en)
FR (1) FR2239791A1 (en)
IT (1) IT1017429B (en)
NL (1) NL7410001A (en)
SE (1) SE392006B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0045105A1 (en) * 1980-07-28 1982-02-03 BBC Aktiengesellschaft Brown, Boveri & Cie. Method and apparatus for the differential protection of electrical installations
EP0090095A1 (en) * 1982-03-29 1983-10-05 BBC Brown Boveri AG Method and device for evaluating the secondary current of a current transformer primary connected to an electric power supply line
FR2550024A1 (en) * 1983-07-25 1985-02-01 Electricite De France CURRENT OVERCURRENT PROTECTION DEVICE
EP0882990A2 (en) * 1997-06-04 1998-12-09 Siemens Aktiengesellschaft Method and apparatus for detecting and correcting a saturated current waveform of a current transformer

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0045105A1 (en) * 1980-07-28 1982-02-03 BBC Aktiengesellschaft Brown, Boveri & Cie. Method and apparatus for the differential protection of electrical installations
EP0090095A1 (en) * 1982-03-29 1983-10-05 BBC Brown Boveri AG Method and device for evaluating the secondary current of a current transformer primary connected to an electric power supply line
FR2550024A1 (en) * 1983-07-25 1985-02-01 Electricite De France CURRENT OVERCURRENT PROTECTION DEVICE
EP0133128A1 (en) * 1983-07-25 1985-02-13 Electricite De France Overcurrent protection device
EP0882990A2 (en) * 1997-06-04 1998-12-09 Siemens Aktiengesellschaft Method and apparatus for detecting and correcting a saturated current waveform of a current transformer
EP0882990A3 (en) * 1997-06-04 2000-11-02 Siemens Aktiengesellschaft Method and apparatus for detecting and correcting a saturated current waveform of a current transformer

Also Published As

Publication number Publication date
NL7410001A (en) 1975-02-05
SE7409994L (en) 1975-02-04
DE2339932B2 (en) 1976-01-22
SE392006B (en) 1977-03-07
JPS5044437A (en) 1975-04-21
DE2339932A1 (en) 1975-02-20
CH579841A5 (en) 1976-09-15
IT1017429B (en) 1977-07-20

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