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High-voltage direct-current glass insulator

A technology of glass insulators and high-voltage direct current, which is applied in the field of glass insulators for high-voltage, ultra-high-voltage, and ultra-high-voltage direct current transmission. It can solve problems such as inability to meet insulation performance requirements and achieve good processing performance.

Inactive Publication Date: 2013-04-10
三瑞科技(江西)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing glass parts of AC insulators cannot meet the above-mentioned insulation performance requirements at various temperatures of HVDC transmission.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1, in the chemical composition range of the insulator glass parts for AC: silicon oxide, aluminum oxide, calcium oxide, magnesium oxide, sodium oxide, potassium oxide system insulator glass, increase the content of potassium oxide to replace part of sodium oxide, increase the third A basic oxide-lithium oxide is added to further strengthen the "neutralization effect" of alkali metal oxides; barium oxide is added to utilize the "suppression effect" of alkaline earth metal oxides. To achieve the purpose of increasing the volume resistivity of glass parts and meet the requirements of DC insulators. The chemical composition of the glass piece in Example 1 is 68% of silicon oxide, 3% of aluminum oxide, 8% of calcium oxide, 3% of magnesium oxide, 2% of barium oxide, 8% of sodium oxide, 7% of potassium oxide, and 1% of lithium oxide. According to the above chemical composition and the actual burning loss rate of each element and other parameters, the process designe...

Embodiment 2

[0012] Example 2, the chemical composition of the glass piece in Example 2 is: 66% silicon oxide, 4% aluminum oxide, 8% calcium oxide, 4% magnesium oxide, 3% barium oxide, 7% sodium oxide, and 8% potassium oxide. According to the above parameters such as chemical composition and burning loss rate, the designer can calculate the weight percentage of quartz sand, feldspar, limestone mineral raw materials and potassium carbonate, soda ash chemical raw materials. After testing the insulating properties of the glass in Example 1 are as follows: At 50°C, the volume resistivity of the glass is 2.2×10 13 Ohm·cm, 2.6×10 at 90°C 10 Ohm cm, 4.9×10 at 120°C 9 Ohm cm, 1.98×10 at 150°C 8 ohm cm.

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Abstract

The invention discloses a high-voltage direct-current glass insulator which comprises a glass part, wherein the glass part comprises the following chemical components in percentage by weight: 65-72% of silicon oxide, 2-4% of aluminum oxide, 6-9% of calcium oxide, 2-5% of magnesium oxide, 1-3% of barium oxide, 7-12% of sodium oxide, 3-9% of potassium oxide and no more than 1% of lithium oxide; and the insulating property of the glass part is as follows: the volume resistivity is not lower than 10<13> ohm.cm at 50 DEG C, is not lower than 10<10> ohm.cm at 90 DEG C, is not lower than 10<9> ohm.cm at 120 DEG C and is not lower than 10<8> ohm.cm at 150 DEG C. According to the invention, the volume resistivity of the glass part can meet the requirements of the high-voltage direct-current power transmission glass part for insulating property: the volume resistivity is not lower than 10<13> ohm.cm at 50 DEG C, is not lower than 10<10> ohm.cm at 90 DEG C, is not lower than 10<9> ohm.cm at 120 DEG C and is not lower than 10<8> ohm.cm at 150 DEG C; and the glass part has favorable processing property and is suitable for industrial production.

Description

technical field [0001] The invention relates to a glass insulator for high voltage, super high voltage and extra high voltage direct current transmission. Background technique [0002] Compared with AC transmission, DC transmission has the advantages of low engineering cost, low power and energy loss, little interference to communication, no need for reactive power compensation, no limitation of stable synchronous operation, and suitable for long-distance transmission. Therefore, DC transmission is generally used. However, high-voltage direct current transmission has higher requirements on the insulation performance of direct current glass insulators. The specific requirements are: the volume resistivity of glass parts under the action of high-voltage direct current should meet the following characteristics: the glass volume resistivity at 50 ° C is not less than 10 13 Ohm cm, not less than 10 at 90°C 10 Ohm cm, not less than 10 at 120°C 9 Ohm cm, not less than 10 at 150°...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C4/16C03C3/087
Inventor 童昌文吴艳红
Owner 三瑞科技(江西)有限公司
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