CN201820628U - Electronic current and voltage transformer - Google Patents
Electronic current and voltage transformer Download PDFInfo
- Publication number
- CN201820628U CN201820628U CN2010202217301U CN201020221730U CN201820628U CN 201820628 U CN201820628 U CN 201820628U CN 2010202217301 U CN2010202217301 U CN 2010202217301U CN 201020221730 U CN201020221730 U CN 201020221730U CN 201820628 U CN201820628 U CN 201820628U
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- composite insulator
- electronic current
- voltage transformer
- voltage
- high pressure
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Abstract
The utility model discloses an electronic current and voltage transformer which comprises an installation base and a high-voltage shell and is characterized in that a composite insulator is arranged between the installation base and the high-voltage shell; a capacitive divider is arranged in the composite insulator; the lower end surface of the capacitive divider is fixed on the installation base and the upper end surface of the capacitive divider is fixed on the lower end surface of the high-voltage shell; and grading rings are arranged at the upper part of the composite insulator. The electronic current and voltage transformer has the advantages that the structure is simple, the cost is greatly reduced, the product weight is small and the supporting structure is simple; when a short-circuit fault occurs, the secondary output is not distorted, the frequency band is relatively wide and the system high-frequency response characteristic is good; since the secondary output is digital and can be directly offered to digital secondary equipment, the digitalization of power systems can be facilitated; and since optical fiber communication is adopted in the data transmission process, the transmission capacity can be improved and the number of communication cables can be greatly reduced.
Description
Technical field
The utility model belongs to the high-tension measurement field, relates to a kind of electronic current voltage transformer, especially a kind of high voltage current transformer ﹠ potential transformer.
Background technology
Electronic current voltage transformer based on Fibre Optical Communication Technology is subjected to extensive concern both domestic and external and further investigation always.The electronic current voltage transformer has remarkable advantages with respect to traditional instrument transformer technology, therefore, the stability of its technology will become the major impetus that promotes intelligent transformer station application technology through engineering approaches, and will play a positive role for the development of automation of transformation substations technology.
Along with the fast development of intelligent electrical network, the measurement that safety, new method reliable, superior performance realize electric power system high voltage, big electric current has been proposed for the detection of electric current, voltage.In conjunction with the development of electronic current mutual inductor and electronic type voltage transformer at present, a kind of electronic current voltage transformer has been proposed.
The utility model content
The purpose of this utility model is to provide a kind of high voltage current transformer ﹠ potential transformer that can satisfy the ehv power transmission specification requirement, not only measures the bus current signal and has also measured bus voltage signal simultaneously.
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, and a kind of electronic current voltage transformer is provided, and comprises the mounting seat and the high pressure body, is provided with composite insulator between the described mounting seat and the high pressure body; Described composite insulator inside is provided with capacitor voltage divider; The lower surface that the lower surface of described capacitor voltage divider is fixed on the mounting seat, the upper surface is fixed on the high pressure body; The top of described composite insulator is provided with grading ring.
Described high pressure body inside is provided with coil; Be provided with optical fiber in the described composite insulator; Described coil and optical fiber are connected on the collector.
High-voltage capacitance C1 in the described capacitor voltage divider and in the relative deviation of the piezoelectricity actual measurement electric capacity that holds C2 and nominal value be no more than ± 5%, and the difference Δ C1%-Δ C2% of the relative deviation of high-voltage capacitance C1 and middle piezoelectricity appearance C2 electric capacity be no more than ± 5%.
Described grading ring is of a size of: external diameter Φ 1500mm, internal diameter Φ 1100mm.Electronic current voltage transformer of the present utility model well solved high-tension current measurement its gather the problem that exists in the measurement, high voltage shielded of transmission, high tension voltage.
The utility model has the advantages that: electronic current voltage transformer insulation system is simple, owing to be current transformer and the combining of voltage transformer, so cost obtained reduction significantly aspect cost, and the little supporting construction of product weight is simple.When being short-circuited fault, secondary output does not distort, frequency band corresponding wide, the system high-frequency response characteristic is good.Simultaneously, secondary is output as digital quantity, can be directly and digitlization secondary device interface, be beneficial to the digitlization process of electric power system.In data transmission procedure, adopted optical fiber communication, improved transmission capacity, significantly reduced the quantity of telecommunication cable.
Description of drawings
Fig. 1 is the structural representation of electronic current voltage transformer of the present utility model; Wherein: 1 is mounting seat; 2 is capacitor voltage divider; 3 is composite insulator; 4 is grading ring; 5 is the high pressure body.
Embodiment
Below in conjunction with accompanying drawing the utility model is done and to be described in further detail: referring to Fig. 1, a kind of electronic current voltage transformer comprises the mounting seat and the high pressure body, is provided with composite insulator between the described mounting seat and the high pressure body; Described composite insulator inside is provided with capacitor voltage divider; The lower surface that the lower surface of described capacitor voltage divider is fixed on the mounting seat, the upper surface is fixed on the high pressure body; The top of described composite insulator is provided with grading ring.
Described high pressure body inside is provided with coil; Be provided with optical fiber in the described composite insulator; Described coil and optical fiber are connected on the collector.
High-voltage capacitance C1 in the described capacitor voltage divider and in the relative deviation of the piezoelectricity actual measurement electric capacity that holds C2 and nominal value be no more than ± 5%, and the difference Δ C1%-Δ C2% of the relative deviation of high-voltage capacitance C1 and middle piezoelectricity appearance C2 electric capacity be no more than ± 5%.
Described grading ring is of a size of: external diameter Φ 1500mm, internal diameter Φ 1100mm.
The mounting seat of electronic current mutual inductor, composite insulator are fixed on the mounting seat, and the capacitor voltage divider lower surface is fixed on the mounting seat, and the capacitor voltage divider upper surface is fixed on the lower surface of the high pressure body of product.The coil that is used for current measurement and protection is installed in the high pressure body, and collector changes the output signal dress of coil into digital optical signal, by the optical fiber that is embedded in the composite insulator signal is transferred to the low pressure survey, provides data message for intelligent merge cells.
This utility model is utilized the principle of capacitance partial pressure, measure a high voltage in real time, capacitive divider is to extract voltage by series capacitor, high-voltage capacitance C1 in the capacitor voltage divider and in the piezoelectricity relative deviation that holds the actual measurement electric capacity of C2 and nominal value be no more than ± 5%, and poor (the Δ C1%-Δ C2%) of the relative deviation of C1 and C2 electric capacity be no more than ± and 5%, to guarantee that its middle voltage deviation is less than ± 5%, capacitor voltage divider can prevent because of the voltage transformer core sataration causes outside the ferro resonance to also have a lot of superior parts on economical and safety; Utilize the principle of Luo-coil, measure the first short circuit fault current in real time, the secondary output of Luo-coil has the characteristic that is proportional to the primary current derivative, the secondary winding of Luo-coil is on non magnetic skeleton, nonmagnetic substance makes that the linear sensor degree is fabulous, can saturatedly also not have hysteresis, so Luo-coil has good stable performance and transient response, provide transient protection to a circuit, realize the high-precision defencive function of current transformer; Utilize the low-power consumption coil to measure a rated current in real time; low-power consumption coil power output is little; can directly provide current measurement signal for collector; simultaneously because the low-power consumption coil has adopted magnetic material as induction coil; have saturation characteristic, therefore when short-circuit current passed through a lead, the saturation characteristic of low-power consumption coil had suppressed the secondary power output; therefore, the low-power consumption coil also has the defencive function to collector.
High-pressure side at the electronic current voltage transformer has designed grading ring, and grading ring is of a size of: external diameter Φ 1500mm, internal diameter Φ 1100mm.Improve electric field structure, shielded partial discharge.
Above content is to further describing that the present invention did in conjunction with concrete preferred implementation; can not assert that the specific embodiment of the present invention only limits to this; for the general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to the present invention and determine scope of patent protection by claims of being submitted to.
Claims (4)
1. an electronic current voltage transformer comprises the mounting seat and the high pressure body, it is characterized in that: be provided with composite insulator between the described mounting seat and the high pressure body; Described composite insulator inside is provided with capacitor voltage divider; The lower surface that the lower surface of described capacitor voltage divider is fixed on the mounting seat, the upper surface is fixed on the high pressure body; The top of described composite insulator is provided with grading ring.
2. a kind of according to claim 1 electronic current voltage transformer is characterized in that: described high pressure body inside is provided with coil; Be provided with optical fiber in the described composite insulator; Described coil and optical fiber are connected on the collector.
3. a kind of according to claim 1 electronic current voltage transformer, it is characterized in that: the high-voltage capacitance C1 in the described capacitor voltage divider and in the relative deviation of the piezoelectricity actual measurement electric capacity that holds C2 and nominal value be no more than ± 5%, and the difference Δ C1%-Δ C2% of the relative deviation of high-voltage capacitance C1 and middle piezoelectricity appearance C2 electric capacity be no more than ± 5%.
4. a kind of according to claim 1 electronic current voltage transformer, it is characterized in that: described grading ring is of a size of: external diameter Φ 1500mm, internal diameter Φ 1100mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202217301U CN201820628U (en) | 2010-06-10 | 2010-06-10 | Electronic current and voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202217301U CN201820628U (en) | 2010-06-10 | 2010-06-10 | Electronic current and voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201820628U true CN201820628U (en) | 2011-05-04 |
Family
ID=43918574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202217301U Expired - Lifetime CN201820628U (en) | 2010-06-10 | 2010-06-10 | Electronic current and voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201820628U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944782A (en) * | 2012-11-07 | 2013-02-27 | 沈阳变压器研究院股份有限公司 | Insulating thermal stability test system |
| CN103364603A (en) * | 2013-07-24 | 2013-10-23 | 桂林电力电容器有限责任公司 | Pillar type capacitor voltage transformer |
| CN103887050A (en) * | 2014-03-25 | 2014-06-25 | 国家电网公司 | Mutual inductor device in intelligent substation |
| CN104111367A (en) * | 2014-07-02 | 2014-10-22 | 中国西电电气股份有限公司 | Ultra-high voltage direct current voltage transformer |
| CN109142839A (en) * | 2018-08-21 | 2019-01-04 | 南京南瑞继保电气有限公司 | A kind of binary channels mutually verifies electronic mutual inductor |
-
2010
- 2010-06-10 CN CN2010202217301U patent/CN201820628U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944782A (en) * | 2012-11-07 | 2013-02-27 | 沈阳变压器研究院股份有限公司 | Insulating thermal stability test system |
| CN103364603A (en) * | 2013-07-24 | 2013-10-23 | 桂林电力电容器有限责任公司 | Pillar type capacitor voltage transformer |
| CN103887050A (en) * | 2014-03-25 | 2014-06-25 | 国家电网公司 | Mutual inductor device in intelligent substation |
| CN104111367A (en) * | 2014-07-02 | 2014-10-22 | 中国西电电气股份有限公司 | Ultra-high voltage direct current voltage transformer |
| CN109142839A (en) * | 2018-08-21 | 2019-01-04 | 南京南瑞继保电气有限公司 | A kind of binary channels mutually verifies electronic mutual inductor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110504 |
|
| CX01 | Expiry of patent term |