CN201335857Y - Voltage sensor for high-voltage DC transmission - Google Patents
Voltage sensor for high-voltage DC transmission Download PDFInfo
- Publication number
- CN201335857Y CN201335857Y CNU2008202284883U CN200820228488U CN201335857Y CN 201335857 Y CN201335857 Y CN 201335857Y CN U2008202284883 U CNU2008202284883 U CN U2008202284883U CN 200820228488 U CN200820228488 U CN 200820228488U CN 201335857 Y CN201335857 Y CN 201335857Y
- Authority
- CN
- China
- Prior art keywords
- voltage
- low
- arm
- string
- base
- 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 - Lifetime
Links
Images
Abstract
The utility model relates to the manufacturing field of voltage sensors for high-voltage, discloses a voltage sensor for high-voltage DC transmission, and is suitable for a plus or minus 500kV DC transmission system. The voltage sensor comprises a base, a porcelain sleeve, a high-pressure terminal, a low-voltage terminal and a ground terminal, wherein the porcelain sleeve is arranged on the base, and the high-pressure terminal is led out of the top of the porcelain sleeve; and the low-voltage terminal capable of inputting voltage measuring signals and the ground terminal are led out of the bottom of the porcelain sleeve, and an airtight cavity body is formed by the base and the porcelain sleeve and is filled with insulating oil. The voltage sensor is characterized in that a cylindrical framework is arranged on the base in the airtight cavity body, and the resistance string of a high-voltage arm and the resistance string of a low-voltage arm are wound along the periphery of the cylindrical framework; and the resistance string of the high-voltage arm and the resistance string of the low-voltage arm are respectively connected with the equalizing capacitance string of the high-voltage arm and the equalizing capacitance string of the low-voltage arm in parallel.
Description
Technical field
The utility model relates to high pressure and makes the field with voltage sensor, and particularly a kind of D.C. high voltage transmission voltage sensor is applicable to ± the 500kV DC transmission system.
Background technology
Compare with the ac transmission advantage of a lot of uniquenesses of direct current transportation, therefore, the development of direct current transportation in recent years rapidly.But, be indispensable equipment in the DC transmission system as measuring D.C. high voltage transmission voltage sensor with protection usefulness, its usable range is wide, and usage quantity is many.
Summary of the invention
The purpose of this utility model is to provide a kind of D.C. high voltage transmission voltage sensor, and it is suitable for the electric pressure height, and the measuring accuracy height is safe and reliable.
In order to achieve the above object, the utility model is achieved by the following technical solutions: a kind of D.C. high voltage transmission voltage sensor, comprise: base, be arranged on the insulator on the base, the HV Terminal that draw at the insulator top, the low-voltage terminal and the ground terminal of the output voltage measuring-signal that draw the insulator bottom, described base and insulator form airtight cavity, be filled with insulating oil in the airtight cavity, it is characterized in that, in described airtight cavity, base is provided with the column skeleton, be wound with the resistance string of high-voltage arm and the resistance string of low-voltage arm along column skeleton periphery, the resistance string of described high-voltage arm and the resistance string of low-voltage arm are parallel with the equalizing capacitance string of high-voltage arm and the equalizing capacitance string of low-voltage arm respectively.
Further characteristics of the present utility model are:
The resistance string of described high-voltage arm is electrically connected with the isopotential point of the equalizing capacitance string of high-voltage arm, and the resistance string of described low-voltage arm is electrically connected with the isopotential point of the equalizing capacitance string of low-voltage arm.
Described column skeleton is made up of many insulated columns that along the circumferential direction are arranged on the base.
Described voltage measurement signal is connected with spacing output circuit by concentric cable, and described spacing output circuit comprises voltage follow-up amplifier, A/D converter, photoisolator, D/A converter and the voltage operational amplifier of series connection successively.
The utility model utilizes insulator and insulating oil to realize High-Voltage Insulation, utilize the resistance string of high-voltage arm resistance string and low-voltage arm to realize dividing potential drop, utilize high-voltage arm equalizing capacitance string and low-voltage arm equalizing capacitance string to realize all pressing, reduce stray capacitance and make voltage divider uneven influence of builtin voltage distributed pole under lightning impulse; And then voltage measurement signal is connected with spacing output circuit by concentric cable, realizes that the photoelectricity of signal is isolated, and strengthens the safe reliability of the low-voltage equipment that is attached thereto.
Description of drawings
Fig. 1 is ± the 500kV D.C. high voltage transmission external structure synoptic diagram of voltage sensor;
Fig. 2 is ± the 500kV D.C. high voltage transmission inner structure synoptic diagram of voltage sensor;
Fig. 3 is ± the 500kV D.C. high voltage transmission circuit theory diagrams of voltage sensor;
Among the figure: 1, base; 2, insulator; 3 HV Terminal; 4, oil level indicator; 5, resistance string; 6, electric capacity string; 7, insulated column; 8, spacing output circuit.
Embodiment
With reference to Fig. 1, Fig. 2, illustrate ± 500kV D.C. high voltage transmission voltage sensor concrete structure.By the fixing insulator 2 of flange, base 1 and insulator 2 form airtight cavity, are filled with insulating oil in the airtight cavity on base 1, and insulator 2 tops are provided with oil level indicator 4 and HV Terminal 3.Draw the low-voltage terminal and the ground terminal of output voltage measuring-signal from insulator 2 bottoms, pass base 1.In airtight cavity, be fixed with the column skeleton on the base 1, the column skeleton is made up of the many insulated columns 7 that along the circumferential direction are arranged on the base, and present embodiment adopts 6.Twine the resistance string of high-voltage arm and the resistance string of low-voltage arm along column skeleton periphery spiral, the resistance string of high-voltage arm and the resistance string of low-voltage arm are parallel with the equalizing capacitance string of high-voltage arm and the equalizing capacitance string of low-voltage arm respectively.
In the present embodiment, select the resistive element of the low inductance of stable low-temperature coefficient to guarantee that voltage sensor has pin-point accuracy.Resistive element in the resistance string adopts R * 0.1% grade of accurate wire-wound resistor of 70 types of being made up of the alloy silk, and performance is more more stable than card sign indicating number silk,, its temperature coefficient changes very little; This resistive element adopts noninductive winding, and inductance value is lower.
With reference to Fig. 3, the resistance string of high-voltage arm is electrically connected with the isopotential point of the equalizing capacitance string of high-voltage arm, and the resistance string of low-voltage arm is electrically connected with the isopotential point of the equalizing capacitance string of low-voltage arm.Voltage measurement signal is drawn by low-voltage terminal and ground terminal, connects spacing output circuit by concentric cable.Spacing output circuit comprises: Chuan Lian voltage follow-up amplifier A successively
1, A/D converter, photoisolator, D/A converter and voltage operational amplifier A
2 Spacing output circuit 8 can prevent that fluctuation that the superpotential of electric system directly attacks secondary weak electricity system and load from changing and causes the variation of sensor intrinsic standoff ratio, and can guarantee that transmission coefficient levels off to 1.Voltage follow-up amplifier A
1The positive polarity input end be provided with the TVS protection tube over the ground, help protecting spacing output circuit 8.
In the present embodiment, isolated DC voltage is 5kV/1min, and its nargin is 50%; Transmission coefficient Tf=1.001 ≈ 1, its random uncertainty is 0.07%, output current is 1mA.
Claims (4)
1, a kind of D.C. high voltage transmission voltage sensor, comprise: base, be arranged on the insulator on the base, the HV Terminal that draw at the insulator top, the low-voltage terminal and the ground terminal of the output voltage measuring-signal that draw the insulator bottom, described base and insulator form airtight cavity, be filled with insulating oil in the airtight cavity, it is characterized in that, in described airtight cavity, base is provided with the column skeleton, is wound with the resistance string of high-voltage arm and the resistance string of low-voltage arm along column skeleton periphery, and the resistance string of described high-voltage arm and the resistance string of low-voltage arm are parallel with the equalizing capacitance string of high-voltage arm and the equalizing capacitance string of low-voltage arm respectively.
2, a kind of D.C. high voltage transmission voltage sensor according to claim 1, it is characterized in that, the resistance string of described high-voltage arm is electrically connected with the isopotential point of the equalizing capacitance string of high-voltage arm, and the resistance string of described low-voltage arm is electrically connected with the isopotential point of the equalizing capacitance string of low-voltage arm.
3, a kind of D.C. high voltage transmission voltage sensor according to claim 1 is characterized in that, described column skeleton is made up of many insulated columns that along the circumferential direction are arranged on the base.
4, a kind of D.C. high voltage transmission voltage sensor according to claim 1, it is characterized in that, described voltage measurement signal is connected with spacing output circuit by concentric cable, and described spacing output circuit comprises voltage follow-up amplifier, A/D converter, photoisolator, D/A converter and the voltage operational amplifier of series connection successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202284883U CN201335857Y (en) | 2008-12-26 | 2008-12-26 | Voltage sensor for high-voltage DC transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202284883U CN201335857Y (en) | 2008-12-26 | 2008-12-26 | Voltage sensor for high-voltage DC transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201335857Y true CN201335857Y (en) | 2009-10-28 |
Family
ID=41287513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202284883U Expired - Lifetime CN201335857Y (en) | 2008-12-26 | 2008-12-26 | Voltage sensor for high-voltage DC transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201335857Y (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807459A (en) * | 2010-03-10 | 2010-08-18 | 中国电力科学研究院 | Ultrahigh-pressure gas insulated porcelain sleeve pipe |
| CN101964524A (en) * | 2010-08-30 | 2011-02-02 | 中国西电电气股份有限公司 | Porcelain bushing type direct current field PLC/RI capacitor |
| CN102230945A (en) * | 2011-04-15 | 2011-11-02 | 奇瑞汽车股份有限公司 | High-voltage isolation direct-current voltage acquisition circuit |
| 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 |
| CN102539888A (en) * | 2012-01-18 | 2012-07-04 | 周有庆 | Direct measurement capacitance-current primary voltage sensor |
| CN102928639A (en) * | 2011-08-07 | 2013-02-13 | 江苏思源赫兹互感器有限公司 | Electronic capacitive voltage divider |
| CN103323640A (en) * | 2013-06-25 | 2013-09-25 | 中国西电电气股份有限公司 | Extra-high-voltage direct-voltage voltage divider with heat dissipation device |
| CN104237593A (en) * | 2014-09-26 | 2014-12-24 | 国家电网公司 | Voltage divider, voltage division circuit thereof and voltage division control method |
| CN104380121A (en) * | 2012-06-01 | 2015-02-25 | 三菱电机株式会社 | Voltage detection device for substation equipment |
| CN104854460A (en) * | 2012-11-16 | 2015-08-19 | 阿尔斯通技术有限公司 | Very high voltage dc line voltage sensor |
| CN107546019A (en) * | 2016-06-27 | 2018-01-05 | 南京南瑞继保电气有限公司 | A kind of direct current resistive voltage transformer |
| CN110809906A (en) * | 2017-06-30 | 2020-02-18 | 韦巴斯托股份公司 | Arrangement for switching resistors |
-
2008
- 2008-12-26 CN CNU2008202284883U patent/CN201335857Y/en not_active Expired - Lifetime
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN101807459B (en) * | 2010-03-10 | 2012-05-23 | 中国电力科学研究院 | Ultrahigh-pressure gas insulated porcelain sleeve pipe |
| CN101807459A (en) * | 2010-03-10 | 2010-08-18 | 中国电力科学研究院 | Ultrahigh-pressure gas insulated porcelain sleeve pipe |
| CN101964524A (en) * | 2010-08-30 | 2011-02-02 | 中国西电电气股份有限公司 | Porcelain bushing type direct current field PLC/RI capacitor |
| CN102230945B (en) * | 2011-04-15 | 2014-06-11 | 奇瑞汽车股份有限公司 | High-voltage isolation direct-current voltage acquisition circuit |
| CN102230945A (en) * | 2011-04-15 | 2011-11-02 | 奇瑞汽车股份有限公司 | High-voltage isolation direct-current voltage acquisition circuit |
| CN102928639A (en) * | 2011-08-07 | 2013-02-13 | 江苏思源赫兹互感器有限公司 | Electronic capacitive voltage divider |
| CN102539888A (en) * | 2012-01-18 | 2012-07-04 | 周有庆 | Direct measurement capacitance-current primary voltage sensor |
| CN104380121A (en) * | 2012-06-01 | 2015-02-25 | 三菱电机株式会社 | Voltage detection device for substation equipment |
| CN104380121B (en) * | 2012-06-01 | 2016-11-09 | 三菱电机株式会社 | Converting equipment voltage check device |
| CN104854460A (en) * | 2012-11-16 | 2015-08-19 | 阿尔斯通技术有限公司 | Very high voltage dc line voltage sensor |
| CN104854460B (en) * | 2012-11-16 | 2018-03-30 | 通用电气技术有限公司 | Super-pressure DC line voltage sensors |
| CN103323640A (en) * | 2013-06-25 | 2013-09-25 | 中国西电电气股份有限公司 | Extra-high-voltage direct-voltage voltage divider with heat dissipation device |
| CN104237593A (en) * | 2014-09-26 | 2014-12-24 | 国家电网公司 | Voltage divider, voltage division circuit thereof and voltage division control method |
| CN107546019A (en) * | 2016-06-27 | 2018-01-05 | 南京南瑞继保电气有限公司 | A kind of direct current resistive voltage transformer |
| CN107546019B (en) * | 2016-06-27 | 2020-07-28 | 南京南瑞继保电气有限公司 | Direct current resistance type voltage transformer |
| CN110809906A (en) * | 2017-06-30 | 2020-02-18 | 韦巴斯托股份公司 | Arrangement for switching resistors |
| CN110809906B (en) * | 2017-06-30 | 2022-06-28 | 韦巴斯托股份公司 | Arrangement for switching resistors |
| US11758620B2 (en) | 2017-06-30 | 2023-09-12 | Webasto SE | Arrangement for switching a resistor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201335857Y (en) | Voltage sensor for high-voltage DC transmission | |
| CN101256892B (en) | Novel high voltage independent type electronic voltage mutual inductor | |
| CN1912638B (en) | Can type capacitor voltage mutual inductor | |
| CN102737828B (en) | With the capacitance type potential transformer of transient over-voltage monitoring unit | |
| CN105428007A (en) | Combined electric appliance with multi-capacitive screen insulation core | |
| CN101713793A (en) | Gas insulation-based DC high voltage measuring device | |
| US20180301304A1 (en) | Multifunctional capacitive-type sleeve with vacuum arc-extinguishing chamber | |
| CN206804718U (en) | Solid compound inslation shield type voltage transformer based on coaxial capacitance | |
| CN101256895A (en) | Novel high voltage combined independent electronic type current, voltage mutual inductor | |
| CN101520471B (en) | Novel DC pulsed attenuator | |
| CN102914731A (en) | Device for detecting point discharge in transformer oil under impulse voltage based on dual electrodes | |
| CN101424707A (en) | Coaxial structure capacitive divider for measuring ns high voltage pulse | |
| CN201853571U (en) | Voltage transformer based on capacitance-resistance voltage division principle | |
| CN206602067U (en) | Pole | |
| CN101893650B (en) | Voltage measurement device for high-voltage direct-current power transmission valve assembly | |
| US10732204B2 (en) | Large-capacitance insulating core, high-voltage electrical appliance and multi-functional high-voltage bushing | |
| CN102005289B (en) | Resistor-capacitor voltage division principle-based voltage transformer | |
| CN104977449A (en) | Optical voltage transformer based on SF6 coaxial capacitance voltage divider | |
| CN106405186A (en) | Dual-purpose voltage divider based on standard capacitor | |
| CN106526284A (en) | Electronic type voltage sensor | |
| CN106291076B (en) | A kind of double difference fraction D-dot overvoltage sensors and measuring system | |
| CN101615502B (en) | Double layered bell jar type voltage and current sensor | |
| CN201402285Y (en) | Double-layered bell jar type voltage current sensor | |
| CN101726646A (en) | Equipotential cavity precise high-voltage sensor | |
| KR20140063072A (en) | Out-door type metering out-fit(mof) having electronics transformer with auxiliary power supply device and pd detection sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091028 |