CN2901529Y - Electronic voltage mutual inductor - Google Patents
Electronic voltage mutual inductor Download PDFInfo
- Publication number
- CN2901529Y CN2901529Y CNU200620033736XU CN200620033736U CN2901529Y CN 2901529 Y CN2901529 Y CN 2901529Y CN U200620033736X U CNU200620033736X U CN U200620033736XU CN 200620033736 U CN200620033736 U CN 200620033736U CN 2901529 Y CN2901529 Y CN 2901529Y
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- CN
- China
- Prior art keywords
- circuit
- tension
- radome
- circuit board
- terminal
- 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
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- Transformers For Measuring Instruments (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model provides an electronic tension transformer comprising an insulator, a first terminal, a under embedded part, a transformer main body and an accessory circuit board, wherein the transformer main body comprises an upper shielding case and a lower shielding case, and a transformer main body circuit comprises a high-tension resistor, a low-tension resistor, a self-restoring protecting tube and arranged between the upper and the lower shielding cases. The connecting relation of the transformer main body circuit is as follows: one end of the high-tension resistor is connected with the first terminal, one end of the low-tension resistor is connected with the high-tension resistor, and the other end is parallelly connected with the accessory circuit board then connected with the under embedded part and the accessory circuit board, after the low-tension resistor parallelly connected with the self-restoring protecting tube. The utility model has the advantages of small volume, light weight, 80% to 120% Un of the measuring range, good linearity, the precision achieving a 0.2 accuracy class, reliable in operating, capable of being connected directly with a computer measuring protection device, and mainly applicable to the tension measurement and the relay protection in electric power system.
Description
Technical field
The utility model relates to voltage measurement and the protective relaying device in a kind of electric power system, particularly relates to a kind of electronic type voltage transformer.
Background technology
Conventional electromagnetic potential transformer is mostly adopted in the measurement of voltage and relaying protection in electric power system.The shortcoming that this kind instrument transformer exists is a complex structure, and volume is big, and frequency band is narrow, secondary singal wave distortion when magnetic saturation takes place, and measure error is big, causes the relay protection misoperation easily.Simultaneously, along with the extensive use of new technology in electric power system based on microprocessor, make the secondary of conventional electromagnetic potential transformer export the voltage that no longer needs 100/ √ 3 or 100/3, but the voltage signal of several volts, therefore conventional electromagnetic potential transformer is difficult to satisfy the power system technology requirement, and these shortcomings of electromagnetic potential transformer have restricted electric power system and developed to intellectuality, digitlization, networking, device miniaturization and multifunction direction.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned shortcoming, provides that a kind of volume is little, in light weight, measuring range is wide, precision is high, reliable, the electronic type voltage transformer that can directly connect with the microcomputer measurement protective device.
The utility model electronic type voltage transformer comprises insulator, embeds a terminal in the insulator, following inserts, current transformer body and auxiliary circuit board.Wherein, current transformer body is by last radome and following radome, is arranged between the upper and lower radome current transformer body circuit that constitutes by high-tension resistive, low resistance, from the recovery and protection pipe and forms.The annexation of current transformer body circuit is terminal of high-tension resistive one termination, low resistance and the termination high-tension resistive other end and an auxiliary circuit board after the recovery and protection pipe is in parallel, inserts and auxiliary circuit board under another termination of back in parallel, following inserts ground connection.Last radome is arranged between terminal and the high-tension resistive, and following radome is arranged on low resistance, between recovery and protection pipe and following inserts.Wherein go up radome and following radome as the uniform electric capacity of electric field, can make that field uniformity improves in the instrument transformer, play the effect of capacitance compensation again.High-tension resistive and low resistance form bleeder circuit, can obtain a very low voltage signal from low resistance.Generally adopt gas discharge tube from the recovery and protection pipe, can when electrical network is subjected to moment impact, puncture automatically, then recover automatically again, rank, back circuit is played automatic protective effect; Auxiliary electrical
Road plate circuit comprises impedance inverter circuit, phase compensating circuit and ratio adjustment circuit, and its annexation is that impedance inverter circuit output connects the phase compensating circuit input, and phase compensating circuit output connects ratio and adjusts circuit input.Wherein, impedance inverter circuit is by resistance R
3, amplifier IC
1Constitute; Phase compensating circuit is by resistance R
4And R
5, variable resistor R
6, capacitor C
1And amplifier IC
2Constitute; Ratio is adjusted circuit by resistance R
7, R
9And R
10, variable resistor R
8And amplifier IC
3Constitute.This auxiliary circuit board is mainly used in does necessary adjustment to the secondary output of current transformer body circuit, can accurately reflect the primary voltage situation to guarantee its secondary output.
The operation principle of the utility model electronic type voltage transformer is; high voltage is added on terminal; carry out dividing potential drop through high-tension resistive and low resistance; obtain a very low voltage from low resistance; adjust again through auxiliary circuit; export one with the linear low voltage signal of a sub-high pressure, this low voltage signal is delivered to the signal acquisition process unit through the double layer screen cable, in order to voltage measurement with implement microcomputer protective relay.The operation principle of auxiliary circuit board is that the low voltage signal of current transformer body circuit output is decayed, make it become strict linear relationship with a high voltage, carry out then exporting the secondary low voltage signal after phase compensation and the ratio adjustment, understand once high-tension situation by detecting the secondary low voltage signal.
The advantage of the utility model electronic type voltage transformer is that volume is little, in light weight, and no secondary winding also can satisfy electric power system metering and protection requirement simultaneously; Measuring range is 80%～120%Un, and the linearity is good, and precision can reach 0.2 class of accuracy, and does not exist saturated; Reliable, no resonance does not have blast or cracking situation; Output low-power voltage signal can directly be connected with the microcomputer measurement protective device, thereby has simplified the structure of microcomputer measurement protective device, reduces system cost.
Description of drawings
Fig. 1: the utility model structural representation
Fig. 2: this reality has the new-type circuit connection layout
Embodiment
The utility model electronic type voltage transformer comprises 2, terminals 1 of insulator, following inserts 8, embeds current transformer body and auxiliary circuit board 11 in the insulator 2.Wherein, current transformer body reaches radome 5 down by last radome 3, the current transformer body circuit that is arranged on radome 3 and is made of high-tension resistive 4, low resistance 7 and gas discharge tube 6 between the radome 5 is down formed, the annexation of current transformer body circuit is terminals 1 of high-tension resistive 4 one terminations, low resistance 7 and gas discharge tube 6 back one termination high-tension resistive, 4 other ends in parallel and auxiliary circuit boards 11, inserts 8 and auxiliary circuit board 11 under another termination of back in parallel.The circuit of auxiliary circuit board 11 comprises impedance inverter circuit, phase compensating circuit and ratio adjustment circuit, and its annexation is that impedance inverter circuit output connects the phase compensating circuit input, and phase compensating circuit output connects ratio and adjusts circuit input.Wherein, impedance inverter circuit is by resistance R
3, amplifier IC
1(OP07) constitute; Phase compensating circuit is by resistance R
4And R
5, variable resistor R
6, capacitor C
1And amplifier IC
2(OP07) constitute; Ratio is adjusted circuit by resistance R
7, R
9And R
10, variable resistor R
8And amplifier IC
3(OP07) constitute.Its annexation is R
3One termination low resistance 7 and gas discharge tube 6 backs in parallel one end, another termination IC
1Positive input terminal, IC
1Negative input end and output termination R
4One end, R
4Another termination C
1, R
5One end and IC
2Negative input end, C
1The other end and R
6One termination IC
2Positive input terminal, R
5Another termination IC
2Output and R
7One end, R
7Another termination R
8One end and IC
3Negative input end, R
8Another termination IC
3Output and R
10One end, R
10The other end is a secondary low-voltage output, R
6Another termination low resistance 7 and the gas discharge tube 6 back other end in parallel and R
9One end, R
9Another termination IC
3Positive input terminal.
Claims (4)
1; a kind of electronic type voltage transformer; comprise insulator; embed a terminal in the insulator; following inserts and current transformer body; it is characterized in that current transformer body reaches radome down by last radome; be arranged between radome and the following radome by high-tension resistive; low resistance and the current transformer body circuit composition that constitutes from the recovery and protection pipe; the annexation of current transformer body circuit is that high-tension resistive one end is connected with a terminal; inserts and auxiliary circuit board under the low resistance and the termination high-tension resistive other end and an auxiliary circuit board after the recovery and protection pipe is in parallel, low resistance and another termination after the recovery and protection pipe is in parallel.
2, electronic type voltage transformer as claimed in claim 1 is characterized in that radome is arranged between terminal and the high-tension resistive, and following radome is arranged on low resistance, between recovery and protection pipe and following inserts.
3, electronic type voltage transformer as claimed in claim 1, it is characterized in that the auxiliary circuit board circuit comprises impedance inverter circuit, phase compensating circuit and ratio adjustment circuit, its annexation is that impedance inverter circuit output connects the phase compensating circuit input, and phase compensating circuit output connects ratio and adjusts the circuit input.
4, electronic type voltage transformer as claimed in claim 3 is characterized in that impedance inverter circuit is by resistance R
3, amplifier IC
1Constitute; Phase compensating circuit is by resistance R
4And R
5, variable resistor R
6, capacitor C
1And amplifier IC
2Constitute; Ratio is adjusted circuit by resistance R
7, R
9And R
10, variable resistor R
8And amplifier IC
3Constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620033736XU CN2901529Y (en) | 2006-04-07 | 2006-04-07 | Electronic voltage mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620033736XU CN2901529Y (en) | 2006-04-07 | 2006-04-07 | Electronic voltage mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2901529Y true CN2901529Y (en) | 2007-05-16 |
Family
ID=38085693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200620033736XU Expired - Lifetime CN2901529Y (en) | 2006-04-07 | 2006-04-07 | Electronic voltage mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2901529Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102637516A (en) * | 2012-04-27 | 2012-08-15 | 南京南瑞继保电气有限公司 | Shielding barrel used for GIS (Geographic Information System) electronic type current mutual inductor |
| CN102738787A (en) * | 2011-04-08 | 2012-10-17 | 上海电力设计院有限公司 | Device for implementing voltage juxtaposition on secondary circuit of electronic voltage transformer |
| CN103558435A (en) * | 2013-11-04 | 2014-02-05 | 国网上海市电力公司 | 35kV broadband electronic type voltage transformer |
| CN104620114A (en) * | 2012-08-03 | 2015-05-13 | Abb技术股份公司 | Voltage measurement device with an insulating body |
-
2006
- 2006-04-07 CN CNU200620033736XU patent/CN2901529Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102738787A (en) * | 2011-04-08 | 2012-10-17 | 上海电力设计院有限公司 | Device for implementing voltage juxtaposition on secondary circuit of electronic voltage transformer |
| CN102738787B (en) * | 2011-04-08 | 2015-12-09 | 上海电力设计院有限公司 | Realize the device of parallel secondary loop voltage of electronic voltage transformer |
| CN102637516A (en) * | 2012-04-27 | 2012-08-15 | 南京南瑞继保电气有限公司 | Shielding barrel used for GIS (Geographic Information System) electronic type current mutual inductor |
| CN104620114A (en) * | 2012-08-03 | 2015-05-13 | Abb技术股份公司 | Voltage measurement device with an insulating body |
| CN104620114B (en) * | 2012-08-03 | 2018-08-17 | Abb瑞士股份有限公司 | Voltage measuring apparatus with insulator |
| CN103558435A (en) * | 2013-11-04 | 2014-02-05 | 国网上海市电力公司 | 35kV broadband electronic type voltage transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 610039 Chengdu, Sichuan, Jinniu District Co-patentee after: SEAC Group Co., Ltd. Patentee after: Xihua University Address before: 610039 Chengdu, Sichuan, Jinniu District Co-patentee before: Sichuan Electrical Equipment Co., Ltd. Patentee before: Xihua University |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070516 |
|
| EXPY | Termination of patent right or utility model |