CN107546019B - Direct current resistance type voltage transformer - Google Patents
Direct current resistance type voltage transformer Download PDFInfo
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- CN107546019B CN107546019B CN201610483026.5A CN201610483026A CN107546019B CN 107546019 B CN107546019 B CN 107546019B CN 201610483026 A CN201610483026 A CN 201610483026A CN 107546019 B CN107546019 B CN 107546019B
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Abstract
The invention discloses a direct current resistance type voltage transformer which comprises a hollow insulator, a shielding ring, an insulating isolation plate, an air charging and discharging device and n resistance-capacitance voltage division modules, wherein the shielding ring and the air charging and discharging device are respectively arranged at two ends of the hollow insulator, the n resistance-capacitance voltage division modules are sequentially connected in series and fixed in the hollow insulator, the insulating isolation plate is arranged between the resistance-capacitance voltage division modules and the air charging and discharging device, and an insulating medium is filled in the hollow insulator. The resistance-capacitance voltage division module comprises an insulation supporting tube, a voltage division capacitor and a plurality of measuring resistors, the voltage division capacitor is fixed in the insulation supporting tube, the measuring resistors are sequentially connected in series and fixed on the outer wall of the insulation supporting tube, the measuring resistors connected in series are connected with the voltage division capacitor in parallel, and insulation media are filled in the insulation supporting tube. The resistance-capacitance voltage dividers in the voltage transformer are modularized, different voltage grades are realized by connecting different numbers of modularized resistance-capacitance voltage dividers in series, the expandability is strong, and the large-scale production is easy.
Description
Technical Field
The invention belongs to the field of power transmission and transformation high-voltage electric appliances, and particularly relates to a direct current resistance type voltage transformer.
Background
The high-voltage direct-current voltage transformer plays an important role in ensuring the safe and stable operation of a high-voltage direct-current transmission system, direct-current voltage measuring equipment used in high-voltage direct-current transmission projects built and under construction in China is imported products, and operation experiences in recent years show that the imported products of the same kind are expensive, are not timely served after sale, are complex in insulating structure due to adoption of oil and gas filling modes, are inconvenient to maintain and cannot completely meet the requirement of long-term stable operation of a direct-current transmission and transformation system.
At present, the direct current voltage measurement generally adopts the following modes: the principle of electromagnetic induction, the principle of a zero-flux comparator, the Pockels electro-optic effect and the principle of resistance voltage division. The resistor voltage division principle is simple, the working performance is stable, and the accuracy is high, so that the resistor voltage division method is widely applied. The national process of the direct current voltage transformer for the direct current transmission engineering in China is relatively lagged behind, and corresponding development experience is lacked, wherein the direct current voltage transformer based on the resistance voltage division principle has no solution to the problem of providing a large-batch resistance-capacitance voltage divider with stable performance.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention aims to provide a direct current resistance type voltage transformer, wherein resistance-capacitance voltage dividers in the voltage transformer are modularized, different voltage levels are realized by connecting different numbers of modularized resistance-capacitance voltage dividers in series, the expandability is strong, and the direct current resistance type voltage transformer is easy to produce in a large scale.
In order to achieve the technical purpose, the technical scheme of the invention is as follows:
a direct current resistance type voltage transformer comprises a hollow insulator, a shielding ring, an insulating isolation plate, an air charging and discharging device and n resistance-capacitance voltage division modules, wherein the number n of the resistance-capacitance voltage division modules is determined by a required voltage grade, the shielding ring and the air charging and discharging device are respectively arranged at two ends of the hollow insulator, the n resistance-capacitance voltage division modules are sequentially connected in series and fixed in the hollow insulator, the insulating isolation plate is arranged between the resistance-capacitance voltage division modules and the air charging and discharging device, and insulating media are filled in the hollow insulator; the resistance-capacitance voltage division module comprises an insulation supporting tube, a voltage division capacitor and a plurality of measuring resistors, the voltage division capacitor is fixed in the insulation supporting tube, the measuring resistors are sequentially connected in series and fixed on the outer wall of the insulation supporting tube, the measuring resistors connected in series are connected with the voltage division capacitor in parallel, and an insulation medium is filled in the insulation supporting tube.
Based on the preferred scheme of the above technical scheme, the outer wall of the support insulating tube is provided with a plurality of spirally arranged groove positions, each groove position is filled with insulating materials, and the measuring resistor is fixed in the groove position in an insulating casting mode.
Based on the preferable scheme of the above technical solution, the insulating material filled in the slot includes, but is not limited to, glass fiber.
Based on the preferable scheme of the technical scheme, the insulating medium in the hollow insulator and the insulating support pipe is insulating gas or insulating oil.
Based on the preferable scheme of the technical scheme, the insulating medium in the hollow insulator and the insulating supporting pipe keeps uniform pressure and density and can mutually circulate.
Adopt the beneficial effect that above-mentioned technical scheme brought:
the invention improves the insulation reliability under the action of direct current voltage and impulse voltage by modularizing the resistance-capacitance voltage dividers, is suitable for large-scale production, can realize voltage transformers with different voltage grades by connecting different numbers of resistance-capacitance voltage dividers in series, and enhances the expandability of products.
According to the invention, the resistor devices connected in series are solidified on the wall of the insulating support pipe by adopting a high-temperature insulating casting method, so that the problem of reliable fixation of the resistor is solved; secondly, the heat dissipation problem of the resistor is solved by controlling the casting material, the process and the thickness of the casting layer; thirdly, the reliability of the resistor device formed by integral casting is far higher than that of a single resistor device fixed in a separated mode; fourthly, the inspection of a large number of resistance devices is made operable.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of the resistance-capacitance voltage division module of the present invention.
Description of reference numerals: 101. measuring the resistance; 102. an insulating support tube; 103. an insulating medium; 104. a voltage dividing capacitor; 201. a shield ring; 202. a resistance-capacitance voltage division module; 203 a hollow insulator; 204. an insulating separator plate; 205. and an inflation and deflation device.
Detailed Description
The technical scheme of the invention is explained in detail in the following with the accompanying drawings.
As shown in fig. 1, a dc resistance type voltage transformer includes a hollow insulator 203, a shielding ring 201, an insulating isolation plate 204, a charging and discharging device 205, and n resistance-capacitance voltage dividing modules 202, where the number n of the resistance-capacitance voltage dividing modules is determined by a required voltage level, the shielding ring 201 and the charging and discharging device 205 are respectively disposed at two ends of the hollow insulator 203, the n resistance-capacitance voltage dividing modules 202 are sequentially connected in series and fixed inside the hollow insulator 203, the insulating isolation plate 204 is disposed between the resistance-capacitance voltage dividing modules 202 and the charging and discharging device 205, and an insulating medium is filled inside the hollow insulator 203.
As shown in fig. 2, the rc voltage dividing module 202 includes an insulating support tube 102, a voltage dividing capacitor 104 and a plurality of measuring resistors 101, the voltage dividing capacitor 104 is fixed inside the insulating support tube 102, the measuring resistors 101 are sequentially connected in series and fixed on the outer wall of the insulating support tube 102, the measuring resistors connected in series are connected in parallel with the voltage dividing capacitor, and the insulating medium 103 is filled inside the insulating support tube.
In this embodiment, a plurality of spirally arranged slots are formed in the outer wall of the supporting insulating tube 103, an insulating material (for example, glass fiber) is filled in each slot, and the measuring resistor 101 is fixed in the slot by insulation casting.
In this embodiment, the insulating medium inside the hollow insulator 203 and the insulating support tube 102 is insulating gas or insulating oil. The hollow insulator and the insulating medium in the insulating support pipe keep uniform pressure and density and can mutually circulate.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the protection scope of the present invention.
Claims (4)
1. A direct current resistance-type voltage transformer is characterized in that: the air-conditioning device comprises a hollow insulator, a shielding ring, an insulating isolation plate, an air charging and discharging device and n resistance-capacitance voltage division modules, wherein the number n of the resistance-capacitance voltage division modules is determined by a required voltage grade, the shielding ring and the air charging and discharging device are respectively arranged at two ends of the hollow insulator, the n resistance-capacitance voltage division modules are sequentially connected in series and fixed in the hollow insulator, the insulating isolation plate is arranged between the resistance-capacitance voltage division modules and the air charging and discharging device, and insulating media are filled in the hollow insulator; the resistance-capacitance voltage division module comprises an insulation supporting tube, a voltage division capacitor and a plurality of measuring resistors, the voltage division capacitor is fixed in the insulation supporting tube, the measuring resistors are sequentially connected in series and fixed on the outer wall of the insulation supporting tube, the measuring resistors connected in series are connected with the voltage division capacitor in parallel, and an insulation medium is filled in the insulation supporting tube; the outer wall of the insulation supporting pipe is provided with a plurality of spirally arranged groove positions, insulation materials are filled in each groove position, and the measuring resistor is fixed in the groove positions in an insulation casting mode.
2. The dc resistive voltage transformer of claim 1, wherein: the insulation material filled in the slot includes, but is not limited to, fiberglass.
3. The dc resistive voltage transformer of claim 1, wherein: and the insulating medium in the hollow insulator and the insulating support pipe is insulating gas or insulating oil.
4. The dc resistive voltage transformer of claim 1, wherein: the hollow insulator and the insulating medium in the insulating support pipe keep uniform pressure and density and can mutually circulate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610483026.5A CN107546019B (en) | 2016-06-27 | 2016-06-27 | Direct current resistance type voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610483026.5A CN107546019B (en) | 2016-06-27 | 2016-06-27 | Direct current resistance type voltage transformer |
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| Publication Number | Publication Date |
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| CN107546019A CN107546019A (en) | 2018-01-05 |
| CN107546019B true CN107546019B (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610483026.5A Active CN107546019B (en) | 2016-06-27 | 2016-06-27 | Direct current resistance type voltage transformer |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110596442B (en) * | 2019-08-12 | 2022-06-07 | 常州博瑞电力自动化设备有限公司 | Electronic voltage transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003059738A (en) * | 2001-08-16 | 2003-02-28 | Toko Electric Corp | Voltage transformer |
| CN201335857Y (en) * | 2008-12-26 | 2009-10-28 | 中国西电电气股份有限公司 | Voltage sensor for high-voltage DC transmission |
| CN101713793B (en) * | 2009-12-04 | 2012-02-01 | 中国西电电气股份有限公司 | Gas insulation-based DC high voltage measuring device |
| CN204989277U (en) * | 2015-08-20 | 2016-01-20 | 中国电力科学研究院 | Take temperature monitoring's dc voltage divider |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7123032B2 (en) * | 2003-12-04 | 2006-10-17 | Fieldmetrics, Inc. | Voltage sensor and dielectric material |
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2016
- 2016-06-27 CN CN201610483026.5A patent/CN107546019B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003059738A (en) * | 2001-08-16 | 2003-02-28 | Toko Electric Corp | Voltage transformer |
| CN201335857Y (en) * | 2008-12-26 | 2009-10-28 | 中国西电电气股份有限公司 | Voltage sensor for high-voltage DC transmission |
| CN101713793B (en) * | 2009-12-04 | 2012-02-01 | 中国西电电气股份有限公司 | Gas insulation-based DC high voltage measuring device |
| CN204989277U (en) * | 2015-08-20 | 2016-01-20 | 中国电力科学研究院 | Take temperature monitoring's dc voltage divider |
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Effective date of registration: 20230627 Address after: 211102, No. 69, Su Yuan Avenue, Jiangning District, Jiangsu, Nanjing Patentee after: NR ELECTRIC Co.,Ltd. Patentee after: NR ENGINEERING Co.,Ltd. Patentee after: NR ELECTRIC POWER ELECTRONICS Co.,Ltd. Address before: 211102, No. 69, Su Yuan Avenue, Jiangning District, Jiangsu, Nanjing Patentee before: NR ELECTRIC Co.,Ltd. Patentee before: NR ENGINEERING Co.,Ltd. |
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