SU508759A1 - The method of determining the location of a single-phase lock on the aerial lines of xv compensated networks and into the networks of xs with an isolated neutral - Google Patents

The method of determining the location of a single-phase lock on the aerial lines of xv compensated networks and into the networks of xs with an isolated neutral

Info

Publication number
SU508759A1
SU508759A1 SU1673800A SU1673800A SU508759A1 SU 508759 A1 SU508759 A1 SU 508759A1 SU 1673800 A SU1673800 A SU 1673800A SU 1673800 A SU1673800 A SU 1673800A SU 508759 A1 SU508759 A1 SU 508759A1
Authority
SU
USSR - Soviet Union
Prior art keywords
networks
location
determining
single
currents
Prior art date
Application number
SU1673800A
Other languages
Russian (ru)
Inventor
Валентин Моисеевич Кискачи
Герман Михайлович Шалыт
Original Assignee
Всесоюзный Научно-Исследовательскийинститут Электроэнергетики
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 Всесоюзный Научно-Исследовательскийинститут Электроэнергетики filed Critical Всесоюзный Научно-Исследовательскийинститут Электроэнергетики
Priority to SU1673800A priority Critical patent/SU508759A1/en
Application granted granted Critical
Publication of SU508759A1 publication Critical patent/SU508759A1/en

Links

Description

Damaged connections have equal levels of harmonics in the currents of two intact phases, and the current of the damaged phase from the supply center to the single-phase circuit contains the sum of the higher harmonics of the three phases of connections, i.e. the level of harmonics in one of the phase currents of the damaged connection is naturally higher than equal levels of the other two phases.

Higher harmonics of the load current of the connections cannot change the indicated ratios of the harmonic levels of the capacitive currents of the damaged and undirected connections, since the neutrals of the load transformers are isolated and the higher harmonics of the load currents are contained in equal quantities in all phase currents, so their sum is always zero.

The drawing shows the distribution of the intensity of the magnetic field in different cross sections of the line.

The advantages of the proposed method lies in the fact that, based on it, the damage site is determined by a qualitative sign regardless of the indication on other lines, as a result of which the use of the described method determines the possibility of using higher sensitivity devices, increases reliability and reduces search time.

The field of application of the proposed method is air networks, compensated or with an isolated neutral. Moreover, the number of lines, their length and the ratio of the capacitive currents of the lines do not impose restrictions on the application of the method.

Claims (1)

  1. Invention Formula
    The method of determining the location of a single-phase closure on air lines in compensated networks and in networks with insulated neutral by measuring along the line path
    magnetic harmonic currents of higher harmonics or superimposed currents of increased frequency in the cross sections perpendicular to the axis of symmetry of the phase conductor arrangement, characterized in that, in order to increase the sensitivity, reliability and speed up the search, in these cross sections the higher the harmonics of the currents of each of the wires at equal distances from them, determine the damaged phase and, by changing the level of the field strength of the damaged phase relative to the other two between the cross sections of the line, ezhdeni
      + f i-Al
    Jj section
    H H
    ir; I - - - i-f
    tin
    t Iucno ri / coe3ijt / e IhlJU
SU1673800A 1971-06-21 1971-06-21 The method of determining the location of a single-phase lock on the aerial lines of xv compensated networks and into the networks of xs with an isolated neutral SU508759A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU1673800A SU508759A1 (en) 1971-06-21 1971-06-21 The method of determining the location of a single-phase lock on the aerial lines of xv compensated networks and into the networks of xs with an isolated neutral

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1673800A SU508759A1 (en) 1971-06-21 1971-06-21 The method of determining the location of a single-phase lock on the aerial lines of xv compensated networks and into the networks of xs with an isolated neutral

Publications (1)

Publication Number Publication Date
SU508759A1 true SU508759A1 (en) 1976-03-30

Family

ID=20480434

Family Applications (1)

Application Number Title Priority Date Filing Date
SU1673800A SU508759A1 (en) 1971-06-21 1971-06-21 The method of determining the location of a single-phase lock on the aerial lines of xv compensated networks and into the networks of xs with an isolated neutral

Country Status (1)

Country Link
SU (1) SU508759A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102064537A (en) * 2010-12-10 2011-05-18 天津天大求实电力新技术股份有限公司 Method for judging and processing single-phase earth faults by using electronic mutual inductor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102064537A (en) * 2010-12-10 2011-05-18 天津天大求实电力新技术股份有限公司 Method for judging and processing single-phase earth faults by using electronic mutual inductor
CN102064537B (en) * 2010-12-10 2013-10-16 天津天大求实电力新技术股份有限公司 Method for judging and processing single-phase earth faults by using electronic mutual inductor

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