EP0068067B1 - Hochspannungswiderstand für Freiluft-Isolieranordnungen - Google Patents

Hochspannungswiderstand für Freiluft-Isolieranordnungen Download PDF

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Publication number
EP0068067B1
EP0068067B1 EP82100844A EP82100844A EP0068067B1 EP 0068067 B1 EP0068067 B1 EP 0068067B1 EP 82100844 A EP82100844 A EP 82100844A EP 82100844 A EP82100844 A EP 82100844A EP 0068067 B1 EP0068067 B1 EP 0068067B1
Authority
EP
European Patent Office
Prior art keywords
high voltage
resistor
voltage resistor
insulator
voltage
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
EP82100844A
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German (de)
English (en)
French (fr)
Other versions
EP0068067A1 (de
Inventor
Manoranjan Prasad Dr.-Ing. Verma
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Individual
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Individual
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Application filed by Individual filed Critical Individual
Priority to AT82100844T priority Critical patent/ATE16431T1/de
Priority to NO821615A priority patent/NO161704C/no
Publication of EP0068067A1 publication Critical patent/EP0068067A1/de
Application granted granted Critical
Publication of EP0068067B1 publication Critical patent/EP0068067B1/de
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges

Definitions

  • the invention relates to a high-voltage resistor for avoiding flashovers on outdoor insulators according to the preamble of claim 1.
  • the high-voltage resistor is intended to prevent flashovers caused by conductive foreign layers, in particular moistened dirt deposits on the surface of outdoor insulators. With such conductive surfaces, a so-called foreign layer leakage current flows first. With this current, foreign layers are dried out at the points of greatest current density and so-called drying zones are formed. These dry zones are then bridged by partial arcs due to the uneven voltage distribution that arises. If the conductivity of the still humid zones is too high, the partial arcs are prolonged and ultimately there is a flashover in the conductor earth voltage.
  • One tries to prevent this flashover by either increasing the creepage distances while maintaining the insulator shape by increasing the overall length or by using insulators with a longer creepage distance while maintaining the overall length.
  • a cylindrical resistor in series is assigned to the insulator to avoid flashover. This resistance is dimensioned so that the flowing leakage current over the surface of the insulator remains small and does not exceed a certain value.
  • the resistors required for this must have a resistance value in the range of a few megohms to a hundred megohms.
  • the disadvantage of this system is that after the formation of a conductive layer on the insulator, almost the entire conductor earth voltage must be taken over by the resistor, since the value of the surface resistance of the insulator becomes very much lower than that of the resistor connected in series when it is heavily contaminated. Such an insulation arrangement thus becomes very long.
  • the arrangement becomes ineffective if a conductive layer forms on the surface of the series-connected resistor due to contamination, so that one is forced, e.g. to install conical covers against pollution, as is apparent from the embodiment of the British patent.
  • AT-PS 175 926 from which i.a. a high-resistance resistor made of semiconductor material emerges parallel to part of a support column.
  • This resistance is intended to relieve the head end of the insulator electrostatically and thus suppress a glow discharge at this point.
  • it also reduces the creepage distance of the column to the remaining part of this column and thus increases the risk of a flashover rather than reducing it.
  • the object of the present invention is to be seen in specifying a high-voltage resistor for use in a series connection with a high-voltage insulator for outdoor insulation arrangements, in which no flashover occurs on the overall arrangement despite conductive foreign layers and a low overall height can be achieved.
  • this object is achieved by the high-voltage resistor defined in claim 1.
  • this high-voltage resistor must be resistant to arcing and breakdown and must be designed in such a way that an electrically parallel conductive layer on its surface changes its total resistance value only slightly.
  • This is achieved by means of outer contours with a comparatively high specific creepage distance and, if one wishes to obtain an even shorter overall length of the outdoor insulation arrangement, by forming the outer surface from a hydrophobic material such as e.g. Polytetrafluoroethylene (PTFE), ethylene propylene monomer (EPM), ethylene propylene diene monomer (EPDM) or silicone rubber achieved.
  • PTFE Polytetrafluoroethylene
  • EPM ethylene propylene monomer
  • EPDM ethylene propylene diene monomer
  • the hydrophobicity of the plastics mentioned ensures that the value of the surface resistance is considerably greater than the value of the resistance, even when exposed to foreign layers.
  • the high voltage resistor resembles an shield insulator in terms of its shape and structure.
  • the order in which such a high-voltage resistor is arranged in the outdoor insulation arrangement is irrelevant; it can thus be connected close to ground as well as voltage, between two insulators or also divided at several locations.
  • the effect of this arrangement is based on the surprising finding that the voltage drop that occurs prevents a flashover even when the characteristic critical leakage current pulse is exceeded.
  • the insulating body can consist of ceramic, glass or plastic and the resistance material in the form of spirals or lei tendency or semiconducting layers to be applied.
  • a special embodiment of the inventive idea is that the insulating body is hollow. Further features with regard to the embodiment of the invention emerge from the subclaims or from the description.
  • An advantage of the embodiment of the device according to the invention consists in a small overall length of the entire insulation arrangement, as a result of which an economical and, as a result of the lower mast height of an overhead line, an environmentally friendly design is achieved.
  • the inventive device of the high-voltage resistor 1, 1 a, 1 b is shown in series with the actual outdoor insulator 2, 2a, 2b in Figures 1 to 3, the outdoor insulator in Fig. 1 as a long-bar insulator, in Fig. 2 as a support insulator and in Fig. 3 is shown as a chain of cap insulators.
  • a resistor for use with a long bar insulator 2 is shown in section. It consists of a resistance wire 3 which is applied to the surface of an insulating body 4 e.g. a porcelain insulator is applied in a spiral shape and is embedded in a glaze 5. The surface is covered with a hydrophobic layer 6 e.g. made of silicone rubber.
  • FIG. 5 Another embodiment is shown in FIG. 5.
  • a conductive glaze 7 is applied to the surface of the insulating body 4, on which in turn a hydrophobic layer 6 is applied.
  • Such wire or film resistors can of course not only be used for long-bar insulators, but also for post insulators, a chain of cap insulators or for bushings, since there are no technological difficulties in adapting the shield shape of the resistor to the shape of these insulators.
  • an insulating body 4 being used which is cylindrical.
  • One or more parallel resistance wires 3 are embedded in the glaze on the cylindrical surface, similar to the conventional glazed wire resistors: on this base body, screens 8 made of open-air resistant plastic material such as e.g. Silicone rubber applied in the form of insulator shields.
  • FIG. 10 differs from FIG. 9 only in that instead of a wire resistor, a sheet resistor 9 is used, which is either formed by a conductive glaze or by a thin metal layer, the resistor being either continuous or spiral.
  • a wire resistor instead of a wire resistor, a sheet resistor 9 is used, which is either formed by a conductive glaze or by a thin metal layer, the resistor being either continuous or spiral.
  • a further embodiment of the resistor is also shown in FIG.
  • High-voltage resistors in the embodiment according to FIG. 6 can be used for outdoor insulation arrangements with long rods according to FIG. 1 or supports according to FIG. 2, the insulating bodies 11 having to be mechanically sufficiently strong. 6 can also be used advantageously in outdoor insulation assemblies without them meet high mechanical requirements.
  • Such an arrangement of the high-voltage resistor 15 for a long-rod insulator 19 is shown in FIG. 8. The insulator 18 only serves to take over the mechanical forces of the actual insulator 19; it is bridged electrically by the resistor 15 connected in parallel.
  • the effectiveness of the cylindrical resistor 10 according to FIG. 6 must not be significantly impaired by the additional electrical parallel connection of the surface of the top long rod insulator 18, which is conductive due to contamination, to the outer surface of the resistor 15, which is conductive due to contamination.
  • This support can usually be achieved with a suitable design of the shields and the surfaces of the long rod insulator 18 of the resistor 15 and the dimensioning of the cylindrical resistor 10 according to the invention;
  • a resistance value of the cylindrical resistor 10 of 20 kOhm can apply and a resistance value for the surface of the uppermost long rod 18, as well as the resistor 15, which is conductive due to heavy contamination about 100 kOhm.
  • the insulating body 11 is also designed as a hollow insulator.
  • the resistor 12 is formed in one of the embodiments of FIG. 4 or 5.
  • Another embodiment is to integrate the high voltage resistor, as shown in FIG. 11, into the isolator of the outdoor isolation arrangement.
  • the resistance can be implemented in the embodiment according to FIG. 4, as shown in FIG. 11, or according to FIG. 5.
  • the resistor is again integrated into the insulator of the outdoor arrangement, but, in contrast to FIG. 11, is arranged distributed.
  • the distributed partial resistors 22 can again be constructed as shown in FIG. 4 or 5, as shown in FIG. 11.
  • the resistance is constructed on the principle of a plastic composite insulator, with a fiber-reinforced core 13 with conductive fibers, e.g. Carbon fiber is used, over which a shield cover 14, e.g. made of silicone rubber.
  • a resistor according to the invention according to FIG. 6 with a length of 160 mm was additionally used, which had a resistance value of 13 kOhm and was connected in series with the insulator L75 / 22.
  • the insulator could no longer flash over, even with the physically highest possible salt content (224 kg / m 3 ).
  • the highest leakage current impulse was 2110 mA.
  • the comparatively tested arrangement consisted of the isolator chain, to which a high-voltage resistor of 13 kOhm according to the invention was connected in series. At the same test voltage of 60.6 kV, the cap chain could not be brought over at a salt content of 224 kg / m 3 . In the test without flashover, the highest leakage current pulse was 5515 mA.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)
EP82100844A 1981-06-26 1982-02-05 Hochspannungswiderstand für Freiluft-Isolieranordnungen Expired EP0068067B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT82100844T ATE16431T1 (de) 1981-06-26 1982-02-05 Hochspannungswiderstand fuer freiluftisolieranordnungen.
NO821615A NO161704C (no) 1981-06-26 1982-05-14 Hoeyspenningsmotstand og anvendelse av denne i friluftshoeyspennings-isolatorer.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3125203 1981-06-26
DE3125203 1981-06-26

Publications (2)

Publication Number Publication Date
EP0068067A1 EP0068067A1 (de) 1983-01-05
EP0068067B1 true EP0068067B1 (de) 1985-11-06

Family

ID=6135469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82100844A Expired EP0068067B1 (de) 1981-06-26 1982-02-05 Hochspannungswiderstand für Freiluft-Isolieranordnungen

Country Status (6)

Country Link
US (1) US4524404A (enrdf_load_stackoverflow)
EP (1) EP0068067B1 (enrdf_load_stackoverflow)
JP (1) JPS585911A (enrdf_load_stackoverflow)
CA (1) CA1198489A (enrdf_load_stackoverflow)
DE (1) DE3267216D1 (enrdf_load_stackoverflow)
ZA (1) ZA823948B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006004811A1 (de) * 2006-01-26 2007-08-09 Siemens Ag Elektrisches Schaltgerät mit Potentialsteuerung

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4835341A (en) * 1988-03-08 1989-05-30 Maxwell Laboratories, Inc. Electrical insulator for use in plasma environment
WO1995026560A1 (en) * 1994-03-28 1995-10-05 Ngk Insulators, Ltd. Conductive insulator
JP2004213984A (ja) * 2002-12-27 2004-07-29 Ngk Insulators Ltd ポリマーポスト碍子装置及びその装着方法
EP1748449A1 (de) * 2005-07-25 2007-01-31 Siemens Aktiengesellschaft Isolator mit erhöhter Isolationsfähigkeit
US8692537B2 (en) * 2009-07-17 2014-04-08 The Invention Science Fund I, Llc Use pairs of transformers to increase transmission line voltage
US20110011621A1 (en) * 2009-07-17 2011-01-20 Searete Llc, A Limited Liability Corporation Of The State Of Delaware Smart link coupled to power line
US8426736B2 (en) * 2009-07-17 2013-04-23 The Invention Science Fund I Llc Maintaining insulators in power transmission systems
KR20110068420A (ko) * 2009-12-16 2011-06-22 (주)디티알 폴리머 핀 애자 및 폴리머 핀 애자의 제조 방법
US8704097B2 (en) 2012-01-23 2014-04-22 General Electric Company High voltage bushing assembly
US8716601B2 (en) 2012-02-08 2014-05-06 General Electric Company Corona resistant high voltage bushing assembly
JP5586808B1 (ja) * 2013-09-06 2014-09-10 三菱電機株式会社 電力用開閉装置用の絶縁支持体
CN104992793B (zh) * 2015-07-08 2017-03-01 清华大学深圳研究生院 防覆冰绝缘子设备及输电线路
CN109448942B (zh) * 2018-12-13 2024-03-12 合肥金瑞配网电气设备有限公司 一种带电压监测接口的避雷器

Family Cites Families (16)

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US1449694A (en) * 1919-09-18 1923-03-27 Gen Electric Protective device
FR528337A (fr) * 1920-12-03 1921-11-10 Ignazio Prinetti Dispositif destiné à signaler l'isolement diminué ou insuffisant d'un isolateur dans les lignes de transmission
GB527357A (en) * 1939-03-27 1940-10-08 Charles William Marshall Improvements relating to high voltage insulators
CH288561A (de) * 1951-03-13 1953-01-31 Bbc Brown Boveri & Cie Aus Gliedisolatoren aufgebauter ein- oder mehrbeiniger Stützisolator in Höchstspannungsanlagen.
AT175926B (de) * 1951-03-13 1953-08-25 Bbc Brown Boveri & Cie Aus Gliedisolatoren aufgebauter ein- oder mehrbeiniger Stützisolator in Höchstspannungsanlagen
DE969089C (de) * 1951-08-07 1958-04-30 Hans Von Cron Dipl Ing Selbstreinigender Freilufthochspannungsisolator
US2776332A (en) * 1952-06-25 1957-01-01 Siemens Ag Self-cleaning outdoor high-tension insulators
GB869797A (en) * 1958-07-11 1961-06-07 Henry Herbert Goldstaub Improvements in or relating to high-tension electrical insulators
GB940400A (en) * 1961-06-06 1963-10-30 Central Electr Generat Board Improvements in or relating to electrical insulators
GB1014624A (en) * 1963-12-12 1965-12-31 Central Electr Generat Board Improvements in or relating to electrical insulators
GB1039193A (en) * 1964-05-22 1966-08-17 Midland Silicones Ltd Improvements in or relating to electrical insulators
GB1296038A (enrdf_load_stackoverflow) * 1969-01-14 1972-11-15
DE2006247A1 (de) * 1970-02-12 1971-10-07 Jenaer Glaswerk Schott & Gen Hochspannungsisolator
DE2034463A1 (de) * 1970-07-11 1972-01-20 Siemens Ag Isolatoren, insbesondere mehrteilige Isolatoren mit großen Einzelisolierstrecken
DE2361204C3 (de) * 1973-12-06 1978-11-23 Siemens Ag, 1000 Berlin Und 8000 Muenchen Elektrische Hochspannungseinrichtung mit Isolierkörpern
FR2412150A1 (fr) * 1977-12-14 1979-07-13 Ceraver Isolateur electrique de ligne en matiere organique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006004811A1 (de) * 2006-01-26 2007-08-09 Siemens Ag Elektrisches Schaltgerät mit Potentialsteuerung

Also Published As

Publication number Publication date
JPS6359208B2 (enrdf_load_stackoverflow) 1988-11-18
US4524404A (en) 1985-06-18
DE3267216D1 (en) 1985-12-12
EP0068067A1 (de) 1983-01-05
CA1198489A (en) 1985-12-24
ZA823948B (en) 1983-07-27
JPS585911A (ja) 1983-01-13

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