CN204439822U - A kind of electronic type voltage transformer on-line testing system - Google Patents
A kind of electronic type voltage transformer on-line testing system Download PDFInfo
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- CN204439822U CN204439822U CN201520134561.0U CN201520134561U CN204439822U CN 204439822 U CN204439822 U CN 204439822U CN 201520134561 U CN201520134561 U CN 201520134561U CN 204439822 U CN204439822 U CN 204439822U
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Abstract
The utility model provides a kind of electronic type voltage transformer on-line testing system, adopts ring electric field sensor array as voltage sensor unit, can obtain primary voltage signal when not power-off.Voltage sensor unit without the need to being directly connected with a wire, but obtains primary voltage signal by the form of electromagnetic induction, thus can not have an impact to the normal operation of circuit, also there is not the problem of ferroresonance.In addition, sensing unit volume is little, lightweight, along with the raising size of electric pressure and weight change little, be very applicable to onsite application.The technical scheme that the utility model is taked is: a kind of electronic type voltage transformer on-line testing system, comprise voltage sensor unit, signal conversion unit, signal transmission unit, verification platform, voltage sensor unit is used for online acquisition primary voltage signal, it exports as standard signal, after signal conversion unit process, be transferred to verification platform by signal transmission unit.Described voltage sensor unit comprises ring electric field sensor array, and ring electric field sensor array is for obtaining primary voltage signal, and ring electric field sensor array is made up of multipair electric-field sensor, and calculates the voltage on wire by the relation between electric field and voltage.
Description
Technical field
A kind of electronic type voltage transformer on-line testing of the utility model system, relates to power system measuring field.
Background technology
The development of intelligent grid and putting into operation in a large number of intelligent substation, propose more and more higher requirement to corresponding measuring technique.Tradition mutual inductor owing to there is ferroresonance, the shortcoming such as transient characterisitics are poor, volume is large, Heavy Weight; the requirement of modern power systems cannot be met; and be analog quantity because traditional mutual inductor exports; voltage transformer (VT) exports and is generally 100V/57.7V; and current transformer exports as 5A/1A, these analog output forms cannot meet metering and protect digitized developing direction.Thus, the electronic mutual inductor based on novel sensing principle obtains increasing application in intelligent substation.Electronic mutual inductor because sensing principle is novel, insulation is simple, export as advantages such as digital quantity and be subject to more attention, generally all employ the electronic mutual inductor of various electric pressure in the intelligent substation newly put into operation.But owing to belonging to new technology, electronic mutual inductor is in operation and also there are some problems, and one of them typical problem is exactly accuracy problems.In actual motion, electronic mutual inductor accuracy off-gage phenomenon is comparatively serious, therefore needs the verification it being carried out to accuracy.
Many scholars are had to carry out the research of electronic type voltage transformer accuracy verification aspect at present.Patent CN203519815U discloses the removable check system of a kind of electronic type voltage transformer, and system is placed onboard, and verifying work can complete onboard, improves the efficiency of on-site proving work.Patent CN102073028A provides a kind of on-the-spot stable state accuracy check system of electronic type voltage transformer, utilizes standard electric electromagnetic type voltage transformer to verify electronic type voltage transformer.But these check systems all need line outage, complicated operation, thus can only regularly carry out.Due to electronic type voltage transformer accuracy less stable, between twice verification, likely there is the situation that accuracy is overproof, cause loss to electric energy metrical.And if shorten the transducer check cycle, then can the overproof problem of accuracy that exists of Timeliness coverage mutual inductor, but this causes again and has a power failure frequently, brings inconvenience to electric company and user.Thus, needing research badly can when mutual inductor charging operation to the on-line testing system that it verifies.Patent CN102645643A discloses a kind of electronic type voltage transformer on-line testing system, by apparatus for automatically lifting, standard mutual inductor and a bus is completed automatic overlap joint, realizes the on-line testing of electronic type voltage transformer.But, because standard mutual inductor adopts conventional electromagnetic voltage transformer (VT), thus may produce ferroresonance during charged access electrical network, bring danger to hot line job.And when electric pressure is higher, equipment volume is large, Heavy Weight, is unfavorable for onsite application.
Summary of the invention
For current electronic type voltage transformer method of calibration Problems existing, the utility model provides a kind of electronic type voltage transformer on-line testing system, adopt ring electric field sensor array as voltage sensor unit, primary voltage signal can be obtained when not power-off.Voltage sensor unit without the need to being directly connected with a wire, but obtains primary voltage signal by the form of electromagnetic induction, thus can not have an impact to the normal operation of circuit, also there is not the problem of ferroresonance.In addition, sensing unit volume is little, lightweight, along with the raising size of electric pressure and weight change little, be very applicable to onsite application.
The technical scheme that the utility model is taked is:
A kind of electronic type voltage transformer on-line testing system, comprise voltage sensor unit, signal conversion unit, signal transmission unit, verification platform, voltage sensor unit is used for online acquisition primary voltage signal, it exports as standard signal, after signal conversion unit process, be transferred to verification platform by signal transmission unit.
Described signal conversion unit, signal transmission unit are placed in shield assembly, Optical Fiber Transmission is passed through in communication between signal conversion unit and signal transmission unit, signal transmission unit comprises two groups of optical fiber, one group is transmitted synchronizing signal, another organizes communicated data signal, carries out data communication between signal transmission unit and verification platform by USB line.
Described voltage sensor unit comprises ring electric field sensor array, and ring electric field sensor array is for obtaining primary voltage signal, and ring electric field sensor array is made up of multipair electric-field sensor, and calculates the voltage on wire by the relation between electric field and voltage.
Described ring electric field sensor array by 2 to, 3 to or 4 right: survey sensor, correcting sensor are formed.
Each sensor in described ring electric field sensor array is all distributed in annulus and connects on the summit of regular polygon, the form that multipair sensor is symmetric.Once there is the situation that wire bias, sensor off-axis or ring electric field sensor array have opening air gap, this symmetry will be destroyed.Now, correcting sensor can compensate the result of survey sensor, reduces measuring error.
Described verification platform is notebook computer, for sending synchronizing signal to signal conversion unit with by school mutual inductor, and carries out analyzing and processing to two paths of signals.
A kind of electronic type voltage transformer on-line testing method, voltage sensor unit is used for online acquisition primary voltage signal, and it exports as standard voltage signal; After receiving the synchronizing signal that sends of verification platform, the simulating signal of voltage sensor unit is converted to digital signal by signal conversion unit, and is transferred to follow-up verification platform by signal transmission unit; Verification platform simultaneously receiver voltage sensing unit and by the data of school voltage transformer (VT), completes analyzing and processing and the error ratio pair of two paths of data.
A kind of electronic type voltage transformer on-line testing method, adopt ring electric field sensor array as voltage sensor unit, ring electric field sensor array is retractable structure.
A kind of electronic type voltage transformer on-line testing method, in ring electric field sensor array, in often pair of sensor, a conduct is measured, and another is as correction, and correcting sensor is used for compensating the output of survey sensor.
A kind of electronic type voltage transformer on-line testing method, when circuit does not have a power failure, can realize the on-line testing of electronic type voltage transformer.Enormously simplify transducer check flow process, and avoid the loss having a power failure and cause.
A kind of electronic type voltage transformer on-line testing of the utility model system, technique effect is as follows:
1), grow for the check-verifying period existed in current electronic type voltage transformer field-checking, need the problem such as line outage, complicated operation, the utility model proposes a kind of on-line testing scheme, adopt ring electric field sensor array as voltage sensor unit, obtain primary voltage signal.Ring electric field sensor array makes retractable structure, directly can be clipped on a wire and measure, but the connection of directly electricity need not be had with a wire, thus can not the normal operation of disturbing line, the resonance problems that may exist when avoiding the charged access of conventional voltage transformer.
2), ring electric field sensor array adopts optical sensor to carry out electric field measurement.Sensor adopts BGO crystal to be made, and insulate simple and reliable, and along with the raising size of electric pressure and weight change little, be very applicable to onsite application, mobility is strong.
3), in order to ensure accuracy of measurement, ring electric field sensor array comprises multipair symmetrical sensor, and often pair of sensor contains a survey sensor and a correcting sensor.Correcting sensor is used for correcting measurement result.After the measurement result of all the sensors is carried out comprehensive analysis processing, final output is as measurement result, thus accuracy when ensure that in-site measurement.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is the structural representation of ring electric field sensor array of the present utility model;
Fig. 3 is the structural representation of open-close type ring electric field sensor array of the present utility model.
Embodiment
As shown in Fig. 1 ~ Fig. 3, a kind of electronic type voltage transformer on-line testing system, comprises voltage sensor unit 1, signal conversion unit 2, signal transmission unit 3 and verification platform 4 four parts.Voltage sensor unit 1 is for obtaining primary voltage signal online, and it exports as standard voltage signal.After receiving the synchronizing signal that sends of verification platform 4, the simulating signal of voltage sensor unit 1 is converted to digital signal by signal conversion unit 2, and is transferred to follow-up verification platform 4 by signal transmission unit 3.Verification platform 4 simultaneously receiver voltage sensing unit 1 and by the data of school voltage transformer (VT), completes analyzing and processing and the error ratio pair of two paths of data.Described voltage sensor unit 1 and signal conversion unit 2 are placed in shield assembly 7.Shield assembly 7 adopts aluminum alloy materials to be made, to reduce the electromagnetic interference (EMI) suffered by interior arrangement.Signal conversion unit 2, after the signal of voltage sensor unit 1 is converted to digital signal, sends signal transmission unit 3 to by optical fiber 5.Signal transmission unit 3, after carrying out framing process to numeral, is transferred to verification platform 4 by USB line 6.
Described voltage sensor unit 1 adopts ring electric field sensor array 8 to obtain primary voltage signal.Ring electric field sensor array 8 adopts multipair survey sensor 9, correcting sensor 10 measures electric field around a wire, survey sensor 9, correcting sensor 10 be 2 to, 3 to or 4 right.And the voltage calculated by the relation between electric field and voltage on wire.In ring electric field sensor array 8, in often pair of sensor, a conduct is measured, and a conduct corrects, and correcting sensor 10, for compensating the output of survey sensor 9, improves accuracy of measurement.
Each sensor in described ring electric field sensor array 8 is all distributed in annulus and connects on the summit of regular polygon, and multiple survey sensor 9, correcting sensor 10 present symmetrical form.When there is wire bias, sensor off-axis or ring electric field sensor array 8 and there is the situation of opening air gap, can destroy this symmetry, now correcting sensor 10 can compensate the result of survey sensor 9, reduces measuring error.
Described signal conversion unit 2 adopts high-precision adc ADS1278 to realize the digitizing of simulating signal, and utilizes electro-optical conversioning device HFBR1414 to convert digital quantity signal to light signal.Signal transmission unit 3 receives the light signal from signal conversion unit 2, and converts light signal to electric signal by electrooptical device HFBR2412.Electric signal sends to verification platform after the microprocessor framing process in signal transmission unit 3.Microprocessor adopts FPGA(model to be EP2C35) as core component.
A kind of electronic type voltage transformer on-line testing system based on ring electric field sensor array of the utility model, adopts ring electric field sensor array 8 as voltage sensor unit 1.Ring electric field sensor array 8 is retractable structure, as shown in Figure 1, be made up of two semi-rings, can directly " pincers " measure on a wire during measurement, but directly electric connection need not be had with a wire, thus can not the normal operation of disturbing line, the resonance problems that may exist when avoiding the charged access of conventional voltage transformer.This on-line testing mode is simple to operate, and checking time is flexible, can Timeliness coverage mutual inductor Problems existing, avoids the loss having a power failure and verify and bring.System adopts optical sensor to carry out electric field measurement, insulate simple and reliable, and along with the raising size of electric pressure and weight change little, be very applicable to onsite application.
Claims (5)
1. an electronic type voltage transformer on-line testing system, comprise voltage sensor unit (1), signal conversion unit (2), signal transmission unit (3), verification platform (4), it is characterized in that, voltage sensor unit (1) is for obtaining primary voltage signal online, it exports as standard signal, after signal conversion unit (2) process, be transferred to verification platform (4) by signal transmission unit (3); Described voltage sensor unit (1) comprises ring electric field sensor array (8), and ring electric field sensor array (8) is for obtaining primary voltage signal, and ring electric field sensor array (8) is made up of multipair sensor.
2. a kind of electronic type voltage transformer on-line testing system according to claim 1, it is characterized in that, described signal conversion unit (2), signal transmission unit (3) are placed in shield assembly (7), communication between signal conversion unit (2) and signal transmission unit (3) is transmitted by optical fiber (5), signal transmission unit (3) comprises two groups of optical fiber (5), one group is transmitted synchronizing signal, another organizes communicated data signal, carries out data communication between signal transmission unit (3) and verification platform (4) by USB line (6).
3. a kind of electronic type voltage transformer on-line testing system according to claim 1, is characterized in that, described ring electric field sensor array (8) by 2 to, 3 to or 4 right: survey sensor (9), correcting sensor (10) are formed.
4. a kind of electronic type voltage transformer on-line testing system according to claim 1, it is characterized in that, each sensor in described ring electric field sensor array (8) is all distributed in annulus and connects on the summit of regular polygon, the form that multipair sensor is symmetric.
5. a kind of electronic type voltage transformer on-line testing system according to claim 1, it is characterized in that, described verification platform (4) is notebook computer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520134561.0U CN204439822U (en) | 2015-03-10 | 2015-03-10 | A kind of electronic type voltage transformer on-line testing system |
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| CN201520134561.0U CN204439822U (en) | 2015-03-10 | 2015-03-10 | A kind of electronic type voltage transformer on-line testing system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777445A (en) * | 2015-03-10 | 2015-07-15 | 三峡大学 | Electronic voltage transformer online checking system |
| CN112557996A (en) * | 2019-09-26 | 2021-03-26 | 武汉国测数据技术有限公司 | Electric energy measuring system convenient for error checking and error checking method |
| CN114152811A (en) * | 2020-09-08 | 2022-03-08 | 武汉国测数据技术有限公司 | Electric energy meter with three-way array structure, and constituent measurement system and measurement method thereof |
| CN114152810A (en) * | 2020-09-08 | 2022-03-08 | 武汉国测数据技术有限公司 | Three-phase electric energy sensor with three-way array structure and measuring system and method thereof |
| CN114152809A (en) * | 2020-09-08 | 2022-03-08 | 武汉国测数据技术有限公司 | Intelligent electric meter with error self-checking function and checking method thereof |
| CN114152806A (en) * | 2020-09-08 | 2022-03-08 | 武汉国测数据技术有限公司 | Electric energy sensor with three-way array structure and measurement system and method formed by electric energy sensor |
| CN114152791A (en) * | 2020-09-08 | 2022-03-08 | 武汉国测数据技术有限公司 | Three-meter method three-phase electric energy meter structure for user self-checking error and checking method |
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2015
- 2015-03-10 CN CN201520134561.0U patent/CN204439822U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104777445A (en) * | 2015-03-10 | 2015-07-15 | 三峡大学 | Electronic voltage transformer online checking system |
| CN112557996A (en) * | 2019-09-26 | 2021-03-26 | 武汉国测数据技术有限公司 | Electric energy measuring system convenient for error checking and error checking method |
| CN112557996B (en) * | 2019-09-26 | 2023-11-03 | 深圳电蚂蚁数据技术有限公司 | Electric energy measurement system convenient for error verification and error verification method |
| CN114152791A (en) * | 2020-09-08 | 2022-03-08 | 武汉国测数据技术有限公司 | Three-meter method three-phase electric energy meter structure for user self-checking error and checking method |
| CN114152809A (en) * | 2020-09-08 | 2022-03-08 | 武汉国测数据技术有限公司 | Intelligent electric meter with error self-checking function and checking method thereof |
| CN114152806A (en) * | 2020-09-08 | 2022-03-08 | 武汉国测数据技术有限公司 | Electric energy sensor with three-way array structure and measurement system and method formed by electric energy sensor |
| CN114152810A (en) * | 2020-09-08 | 2022-03-08 | 武汉国测数据技术有限公司 | Three-phase electric energy sensor with three-way array structure and measuring system and method thereof |
| CN114152811A (en) * | 2020-09-08 | 2022-03-08 | 武汉国测数据技术有限公司 | Electric energy meter with three-way array structure, and constituent measurement system and measurement method thereof |
| CN114152806B (en) * | 2020-09-08 | 2024-03-15 | 武汉国测数据技术有限公司 | Electric energy sensor with three-way array structure and measurement system and method formed by same |
| CN114152810B (en) * | 2020-09-08 | 2024-03-15 | 武汉国测数据技术有限公司 | Three-phase electric energy sensor with three-way array structure and measuring system and method thereof |
| CN114152811B (en) * | 2020-09-08 | 2024-03-15 | 武汉国测数据技术有限公司 | Electric energy meter with three-way array structure and measuring system and measuring method formed by electric energy meter |
| CN114152791B (en) * | 2020-09-08 | 2024-03-15 | 武汉国测数据技术有限公司 | Three-meter-method three-phase electric energy meter structure with user self-checking error and checking method |
| CN114152809B (en) * | 2020-09-08 | 2024-03-15 | 武汉国测数据技术有限公司 | Smart electric meter with error self-checking function and checking method thereof |
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