CN1235053C - Combined type electronic current-voltage sensor - Google Patents
Combined type electronic current-voltage sensor Download PDFInfo
- Publication number
- CN1235053C CN1235053C CN 200310105855 CN200310105855A CN1235053C CN 1235053 C CN1235053 C CN 1235053C CN 200310105855 CN200310105855 CN 200310105855 CN 200310105855 A CN200310105855 A CN 200310105855A CN 1235053 C CN1235053 C CN 1235053C
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- voltage sensor
- voltage
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- shell
- conductor
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- 239000004020 conductor Substances 0.000 claims abstract description 29
- 239000003990 capacitor Substances 0.000 claims abstract description 13
- 238000005070 sampling Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 10
- 230000005291 magnetic effect Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005350 ferromagnetic resonance Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Abstract
The present invention relates to a combined electronic current-voltage sensor which is characterized in that the voltage sensor adopts a capacitor voltage division principle and a radial sampling method, and an intermediate electrode is inserted among a primary high-voltage conductor, a grounding casing and a supporting frame; thus, two capacitors C1, C2 are respectively formed between the primary conductor and the intermediate electrode, and among the intermediate electrode, the grounding casing and the supporting frame. When the primary conductor produce high voltage, a linear relationship is approximately formed from the differential coefficient of a voltage signal collected from both ends of a sampling resistor connected in parallel with the capacitor C2 and primary voltage, and the current sensor is combined with the voltage sensor in the same casing by the linear relationship. In the current sensor, both ends of a primary electric conductor are supported by an insulating piece through the center of an annular insulating skeleton wound with a secondary coil, the secondary coil is sheathed on a grounding metal supporting frame, and the secondary coil is a Rogowski coil. The combined electronic current-voltage sensor has the advantages of small size, light weight, wide measuring frequency band, good measuring linearity, high accuracy, high output of digital signals, etc.
Description
Technical field: the present invention relates to a kind of novel High-Voltage Electrical Appliances element, particularly about a kind of compound electronic current voltage sensor, it can be used for the measurement of high voltage and big electric current and provides signal to relay protection device.
Background technology: in the electric system at present, traditional electromagnetic potential transformer summation current transformer is adopted in the measurement of voltage and current and enforcement relay protection mostly.This mutual inductor all has iron core, and it is narrower to measure frequency band, magnetic saturation occurs easily and causes big error, and volume is bigger, and is very heavy, is output as simulating signal.Also having a kind of capacitance type potential transformer, because they adopt standard capacitor divider, and is simulating signal output.Along with the development of technology, the volume of customer requirements electric equipment is more and more littler, and is intelligent, automaticity is more and more higher, and the digitizing of secondary relay protection also requires electric current, voltage transformer (VT) that digital signal can directly be provided.Obviously, the traditional no longer development of adaptive technique of electromagnetic potential transformer summation current transformer.
Summary of the invention: the purpose of this invention is to provide a kind of compound electronic current voltage sensor, it has, and volume is little, in light weight, the measurement bandwidth, advantages such as the measure linear degree is good, precision is high, digital signal output.
Technical scheme of the present invention is: design a kind of compound electronic current voltage sensor, it is characterized in that: the method that voltage sensor adopts the capacitance partial pressure principle and radially samples, between high-pressure conductor and grounding shell and support, insert target, so just, between Primary Conductor and target, target and grounding shell and support, form two capacitor C 1 and C2, when Primary Conductor band high voltage, the derivative and the primary voltage of the voltage signal of adopting from the sampling resistor two ends in parallel with C2 are approximated to linear relationship.
It is compounded in current sensor and voltage sensor among the same shell, the center of current sensor, energized conductor annular insulation framework by being wound with secondary coil, and its two ends are supported with insulating part; Secondary coil is sleeved on the metal support of ground connection, and secondary coil adopts the Rogowski coil.
Described compound electronic current voltage sensor is connected and composed by air core coil, coil brace, fixture, electrode, housing, sealed end daughter board, the radome at target and two ends passes through insulation component, bolt on the shell of ground connection, one time energized conductor is fixed by the insulating part at two ends, air core coil is sleeved on the outside of the coil brace of ground connection, forms the composite structured of a kind of current sensor and voltage sensor.
Described support links to each other with the shell of ground connection by bolt, in the inboard of support and shell target is arranged, and energized conductor and their supports, shell, target are coaxial, have formed capacitor C 1 and C2.
Described one-piece construction is a loop configuration.
Described target length range vertically is at 190～210mm, and optimum length is 200mm..
Described capacitor C 1 is 1: 150 with the ratio of C2.
The wedge angle of described shielding bolt adds radome, and radome is to be connected with shell and support by fixture.
The scope of the arc radius of described radome is at 38～45mm, and best arc radius is 40mm.
Described sealed end daughter board is connected with body seal, is fixed with shielded cable on the sealed end daughter board.
The present invention has following characteristics:
1. its adopts current sensor and voltage sensor to be compounded among the same shell, the center of current sensor, energized conductor annular insulation framework by being wound with secondary coil, and its two ends are supported with insulating part; Secondary coil is sleeved on the metal support of ground connection, secondary coil adopts the Rogowski coil, when having electric current to flow through in the Primary Conductor, the magnetic field that produces around it can induce voltage at the secondary coil two ends, the size that flows through electric current in the derivative of this voltage and the Primary Conductor is directly proportional, and the phase place unanimity.No iron core does not have the magnetic saturation phenomenon, and measurement range is wide, the linearity good; Voltage sensor adopts the capacitance partial pressure principle, Cai Yang method radially, between high-pressure conductor and grounding shell and support, insert target, so just, between Primary Conductor and target, target and grounding shell and support, form two capacitor C 1 and C2, when Primary Conductor band high voltage, the derivative and the primary voltage of the voltage signal of adopting from the sampling resistor two ends in parallel with C2 are approximated to proportional relation.It makes that equally measurement range is wide, the linearity good, can not produce magnetic saturation and ferromagnetic resonance phenomenon, and dividing potential drop electric capacity is ganged condenser, and this capacitor that radially distributes is to make full use of structural design features and the electric capacity that forms, and simple in structure, volume is little; Capacitor is mainly with compression SF
6Gas guarantees the stable of capacitance, thereby guarantees the high measuring accuracy of voltage sensor that volume is little, and is in light weight, ratio of performance to price height as insulating medium.
2, owing to there is not the magnetic saturation phenomenon, measurement range is wide, bandwidth, and therefore same equipment both can be used as measurement usefulness, can be used as protection again and uses.Digitizing output can be satisfied the digitizing of measurement, relay protection, intelligentized requirement better.
3, the sealed end daughter board is connected with body seal, and it also can not be subjected to the signal that collects the signal processing apparatus of exporting to of external interference with shielded cable 3.
The present invention will be further described below in conjunction with the embodiment accompanying drawing.
Description of drawings: Fig. 1 is embodiment partial structurtes synoptic diagram.
Among the figure: 1, conductor; 2, bolt; 3, shielded cable; 4, shell; 5, sealed end daughter board; 6, bolt; 7, insulation component; 8, insulation component; 9, air core coil; 10, support; 11, target; 12, radome.
Embodiment: as shown in Figure 1, air core coil 9 is sleeved on the outside of the coil brace 10 of ground connection, support 10 links to each other with the shell 4 of ground connection by bolt 2, inboard at support 10 and shell 4 installs target 11 additional, the radome 12 at target 11 and two ends is fixed on the support 10 of the shell 4 of ground connection and ground connection by insulation component 7,8 and bolt 6, once charged (voltage and current) conductor 1 is fixed by the insulating part at two ends, guarantees coaxial with above-mentioned element shell 4, air core coil 9, support 10, target 11, radome 12.The voltage signal that air core coil 9 and target 11 are gathered is transferred to signal processing apparatus by shielded cable 3 and sealed end daughter board 5.This compound electronic current voltage sensor, for current sensor, the center of energized conductor annular insulation framework by being wound with secondary coil, secondary coil adopts the Rogowski coil, when having electric current to pass through in the Primary Conductor, the magnetic field that produces around it can induce voltage at the secondary coil two ends, and the size that flows through electric current in the derivative of this voltage and the Primary Conductor is directly proportional, and the phase place unanimity.Because secondary coil does not have iron core, therefore, does not have the magnetic saturation phenomenon, is good linear relationship in the whole measurement range, measurement range is wide, and precision is higher.For product of voltage integral body is annular, adopts the capacitance partial pressure principle, and radially Cai Yang method makes volume little.Between high-pressure conductor and grounding shell and support, insert target, so just, form two capacitor C 1 and C2 between Primary Conductor and target, target and grounding shell and support, the derivative and the primary voltage of the voltage signal of adopting from the sampling resistor two ends in parallel with C2 are approximated to proportional relation like this.By reasonable structural design, guaranteeing has certain proportionate relationship between C1 and the C2, and selects suitable sampling resistor, can guarantee that measuring error is within the scope of regulation.Therefore volume is little, and no iron core can not produce the ferromagnetic resonance phenomenon.
Claims (5)
1, compound electronic current voltage sensor, it is characterized in that: the method that voltage sensor adopts the capacitance partial pressure principle and radially samples, between high-pressure conductor and grounding shell and support, insert target, so just, between Primary Conductor and target, target and grounding shell and support, form two capacitor C 1 and C2, when Primary Conductor band high voltage, the derivative and the primary voltage of the voltage signal of adopting from the sampling resistor two ends in parallel with C2 are approximated to linear relationship; It is compounded in current sensor and voltage sensor among the same shell, the center of current sensor, energized conductor annular insulation framework by being wound with secondary coil, and its two ends are supported with insulating part; Secondary coil is sleeved on the metal support of ground connection, and secondary coil adopts the Rogowski coil; Compound electronic current voltage sensor is connected and composed by air core coil, coil brace, fixture, electrode, housing, the radome at target and two ends passes through insulation component, bolt on the shell of ground connection, one time energized conductor is fixed by the insulating part at two ends, air core coil is sleeved on the outside of the coil brace of ground connection, forms the composite structured of a kind of current sensor and voltage sensor.
2, compound electronic current voltage sensor according to claim 1, it is characterized in that: described support links to each other with the shell of ground connection by bolt, there is target inboard at support and shell, energized conductor and support, shell, target are coaxial, form an integral ring-shaped structure.
3, compound electronic current voltage sensor according to claim 1 is characterized in that: described target length range vertically is at 190-210mm, and optimum length is 200mm.
4, compound electronic current voltage sensor according to claim 1 is characterized in that: described capacitor C 1 is 1: 150 with the ratio of C2.
5, compound electronic current voltage sensor according to claim 1, it is characterized in that: the scope of the arc radius of radome is at 38-45mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310105855 CN1235053C (en) | 2003-10-24 | 2003-10-24 | Combined type electronic current-voltage sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310105855 CN1235053C (en) | 2003-10-24 | 2003-10-24 | Combined type electronic current-voltage sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1538181A CN1538181A (en) | 2004-10-20 |
| CN1235053C true CN1235053C (en) | 2006-01-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310105855 Expired - Lifetime CN1235053C (en) | 2003-10-24 | 2003-10-24 | Combined type electronic current-voltage sensor |
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| Country | Link |
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| CN (1) | CN1235053C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8163574B2 (en) | 2009-05-08 | 2012-04-24 | Eaton Corporaton | System and method for sensing voltage in medium-to-high voltage applications |
| CN102735895B (en) * | 2012-06-05 | 2013-12-11 | 平高集团有限公司 | Capacitive voltage divider |
| CN104391161A (en) * | 2014-11-21 | 2015-03-04 | 广西智通节能环保科技有限公司 | Electronic voltage transducer |
| CN106018917B (en) * | 2016-05-18 | 2019-02-15 | 中国科学院电子学研究所 | A kind of passive Current Voltage integrated sensor |
| CN106771467A (en) * | 2016-11-16 | 2017-05-31 | 国家电网公司 | Current sensor, its coil encapsulation method and electronic current mutual inductor |
| CN109030909A (en) * | 2018-07-13 | 2018-12-18 | 北京和信瑞通电力技术股份有限公司 | A kind of distribution one or two times fusions three-phase resistance reactance divided voltage sensor |
| CN112710885B (en) * | 2020-12-18 | 2024-02-27 | 北京北方华创微电子装备有限公司 | Radio frequency sensor, matcher, matching parameter determining method and semiconductor device |
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2003
- 2003-10-24 CN CN 200310105855 patent/CN1235053C/en not_active Expired - Lifetime
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| Publication number | Publication date |
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| CN1538181A (en) | 2004-10-20 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: XI'AN XD SWITCHHGEAR ELECTRIC CO.,LTD. Free format text: FORMER NAME: XI'AN XIKAI HIGH-VOLTAGE ELECTRIC CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 710077 No. 509, Daqing Road, Xi'an, Shaanxi Patentee after: XI'AN XD SWITCHGEAR ELECTIC Co.,Ltd. Address before: 710077 No. 29, Daqing Road, Xi'an, Shaanxi Patentee before: XIKAI HIGH VOLTAGE ELECTRIC Co. |
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Granted publication date: 20060104 |