EP0068067A1 - Résistance à haute tension pour isolateurs de lignes aériennes - Google Patents

Résistance à haute tension pour isolateurs de lignes aériennes Download PDF

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Publication number
EP0068067A1
EP0068067A1 EP82100844A EP82100844A EP0068067A1 EP 0068067 A1 EP0068067 A1 EP 0068067A1 EP 82100844 A EP82100844 A EP 82100844A EP 82100844 A EP82100844 A EP 82100844A EP 0068067 A1 EP0068067 A1 EP 0068067A1
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EP
European Patent Office
Prior art keywords
voltage
insulator
voltage resistor
resistor
resistor according
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
EP82100844A
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German (de)
English (en)
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EP0068067B1 (fr
Inventor
Manoranjan Prasad Dr.-Ing. Verma
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Individual
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Individual
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Priority to AT82100844T priority Critical patent/ATE16431T1/de
Priority to NO821615A priority patent/NO161704C/no
Publication of EP0068067A1 publication Critical patent/EP0068067A1/fr
Application granted granted Critical
Publication of EP0068067B1 publication Critical patent/EP0068067B1/fr
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 to avoid flashovers for outdoor insulation assemblies, consisting of an insulating body and a resistance material, which is connected in series with an insulator.
  • a high-voltage resistor to avoid flashovers for outdoor insulation assemblies, consisting of an insulating body and a resistance material, which is connected in series with an insulator.
  • one or more high-voltage resistors or high-voltage insulators of any design, such as Long rods, support and cap insulators can be used for both DC and AC voltages.
  • 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 drying zones are then bridged by partial arcs due to the uneven voltage distribution that arises. If the conductivity of the still wet zones is too high, the partial arcs are extended and 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 such 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 has to 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 very dirty. Such an insulation arrangement thus becomes very long.
  • the arrangement becomes ineffective if a conductive layer forms on the surface of the series 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.
  • 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.
  • the object is achieved in that the leakage current pulse characteristic of the high-voltage insulator on the total resistance the high-voltage resistor caused a voltage drop of at least 5, preferably 10-30% of the total conductor earth voltage and its shape is modeled on a shield insulator.
  • this high-voltage resistor must be resistant to arcing and breakdown and must be designed so 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 polytetrafluoroethylene (PTFE), ethylene propylene monomer (EPM), ethylene propylene diene monomer (EPDM). or silicone rubber reached.
  • a hydrophobic material such as polytetrafluoroethylene (PTFE), ethylene propylene monomer (EPM), ethylene propylene diene monomer (EPDM). or silicone rubber reached.
  • PTFE polytetrafluoroethylene
  • EPM ethylene propylene monomer
  • EPDM ethylene propylene diene monomer
  • silicone rubber silicone rubber
  • the insulating body can consist of ceramic, glass or plastic and the resistance material can be applied to it in the form of spirals or conductive or semiconductive layers.
  • a special embodiment of the inventive idea is that the insulating body is hollow.
  • Other features regarding the embodiment of the invention go 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.
  • it proves to be particularly advantageous in the context of the invention that existing insulation arrangements in which the foreign-layer loads have become stronger over time can be prevented from flashover or from constant cleaning by using the high-voltage resistor according to the invention in series built in.
  • the device according to the invention of the high-voltage resistor 1, 1a, 1b is shown in series with the actual outdoor insulator 2, 2a, 2b in FIGS. 1 to 3, the outdoor insulator in FIG. 1 as a long bar insulator, in FIG. 2 as a post 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.
  • Wire or film resistors designed in this way can of course not only be used for long-rod insulators, but also for post insulators, a chain of cap insulators or for bushings, since there are no technical 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: Shields 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.
  • FIG. 6 A further embodiment of the resistor can also be seen in FIG. 6.
  • a cylindrical resistor 10 inside a hollow insulator 11.
  • the surface of the hollow insulator can in turn be coated with a hydrophobic material 6.
  • High-voltage resistors in the embodiment according to FIG. 6 can be used for outdoor insulation arrangements with long rods Fig. 1 or supports according to Fig. 2 are used, wherein the insulating body 11 must be mechanically sufficiently strong. 6 can also be used advantageously in outdoor insulation arrangements without meeting 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 uppermost 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 requirement can usually be met with a suitable design of the shields and the surfaces of the long rod insulator 18 of the resistor 15 and the inventive dimensioning of the cylindrical resistor 10;
  • 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 resistor 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 ceramic long rod L 75/22 with a length of 1270 mm and a creepage distance of 2440 mm was used as the insulator, in accordance with the regulations of DIN 48006/2.
  • a standing salt content of 28 kg / m 3 at 63 kV was achieved with the resistor according to the invention for the conventional arrangement, that is to say without series connection.
  • the critical leakage current pulse at the flashover was measured at 1072 mA (peak value). This leakage current pulse is characteristic of the isolator used. The tests were carried out with a rigid voltage source (short-circuit current 20 A).
  • an inventive resistor according to FIG. 6 with an overall 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 not even with the highest possible salinity (224 kg / m 3 ) more to roll over.
  • the highest leakage current pulse was 2110 mA.
  • the comparatively tested arrangement consisted of the isolator chain, to which an inventive high-voltage resistor of 13 kOhm was connected in series. Salinity, 224 kg / m l in the same test voltage of 60.6 kV, the cap chain could not be brought to flashover. In the test without flashover, the highest leakage current pulse was 5515 mA.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulators (AREA)
EP82100844A 1981-06-26 1982-02-05 Résistance à haute tension pour isolateurs de lignes aériennes Expired EP0068067B1 (fr)

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 true EP0068067A1 (fr) 1983-01-05
EP0068067B1 EP0068067B1 (fr) 1985-11-06

Family

ID=6135469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82100844A Expired EP0068067B1 (fr) 1981-06-26 1982-02-05 Résistance à haute tension pour isolateurs de lignes aériennes

Country Status (6)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109448942A (zh) * 2018-12-13 2019-03-08 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

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
CN1089477C (zh) * 1994-03-28 2002-08-21 日本碍子株式会社 具有导电表面涂层以防止电晕放电的绝缘子
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 (fr) * 2005-07-25 2007-01-31 Siemens Aktiengesellschaft Isolateur avec une capacité augmentée d'isolation
DE102006004811A1 (de) * 2006-01-26 2007-08-09 Siemens Ag Elektrisches Schaltgerät mit Potentialsteuerung
US8426736B2 (en) * 2009-07-17 2013-04-23 The Invention Science Fund I Llc Maintaining insulators in power transmission systems
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
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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT175926B (de) * 1951-03-13 1953-08-25 Bbc Brown Boveri & Cie Aus Gliedisolatoren aufgebauter ein- oder mehrbeiniger Stützisolator in Höchstspannungsanlagen
GB1039193A (en) * 1964-05-22 1966-08-17 Midland Silicones Ltd Improvements in or relating to electrical insulators
GB1296038A (fr) * 1969-01-14 1972-11-15

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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.
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
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT175926B (de) * 1951-03-13 1953-08-25 Bbc Brown Boveri & Cie Aus Gliedisolatoren aufgebauter ein- oder mehrbeiniger Stützisolator in Höchstspannungsanlagen
GB1039193A (en) * 1964-05-22 1966-08-17 Midland Silicones Ltd Improvements in or relating to electrical insulators
GB1296038A (fr) * 1969-01-14 1972-11-15

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109448942A (zh) * 2018-12-13 2019-03-08 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
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

Also Published As

Publication number Publication date
JPS6359208B2 (fr) 1988-11-18
CA1198489A (fr) 1985-12-24
US4524404A (en) 1985-06-18
DE3267216D1 (en) 1985-12-12
JPS585911A (ja) 1983-01-13
EP0068067B1 (fr) 1985-11-06
ZA823948B (en) 1983-07-27

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