CN207096345U - A kind of GIS insulator surfaces Transient Electric Field measurement apparatus - Google Patents
A kind of GIS insulator surfaces Transient Electric Field measurement apparatus Download PDFInfo
- Publication number
- CN207096345U CN207096345U CN201721114211.3U CN201721114211U CN207096345U CN 207096345 U CN207096345 U CN 207096345U CN 201721114211 U CN201721114211 U CN 201721114211U CN 207096345 U CN207096345 U CN 207096345U
- Authority
- CN
- China
- Prior art keywords
- polarization
- sensor
- electric field
- fiber
- polarizer
- 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.)
- Active
Links
- 230000005684 electric field Effects 0.000 title claims abstract description 47
- 239000012212 insulator Substances 0.000 title claims abstract description 38
- 230000001052 transient effect Effects 0.000 title claims abstract description 18
- 238000005259 measurement Methods 0.000 title claims abstract description 16
- 230000010287 polarization Effects 0.000 claims abstract description 65
- 238000012545 processing Methods 0.000 claims abstract description 11
- 239000000835 fiber Substances 0.000 claims description 42
- 230000003287 optical effect Effects 0.000 claims description 39
- 239000013307 optical fiber Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 230000005693 optoelectronics Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The application is related to field strength measurement technical field, more particularly to a kind of GIS insulator surfaces Transient Electric Field measurement apparatus.The device includes：Processing unit and measuring unit, the processing unit include SLD, the polarizer, polarization beam apparatus, photoreceiver and oscillograph；The measuring unit includes sensor.Wherein, the SLD is connected with the polarizer, and the polarizer is connected with the sensor, and the sensor is connected with the polarization beam apparatus, and the polarization beam apparatus is connected with the photoreceiver, and the photoreceiver is connected with the oscillograph.The device being capable of direct measurement insulator surface electric field, obtain the data such as intensity and the frequency of insulator surface electric field, and measurement range can cover 100M Hz 1G Hz high-frequency impulse, have higher precision for relatively conventional VFTO test devices, and simple to operate.
Description
Technical Field
The application relates to the technical field of field intensity measurement, in particular to a GIS insulator surface transient electric field measuring device.
Background
A Gas Insulated Switchgear (GIS) has many features such as small occupied area and space volume, safe and reliable operation, little influence from natural environment, good circuit breaker breaking performance, and convenient installation, and is widely used in ac substations. In the GIS, the insulator is an important insulating part and plays roles of fixing, insulating, sealing and the like.
In actual operation, when a disconnecting switch in the GIS is switched to a small capacitive load, due to the reasons that the contact movement speed is low, the arc extinguishing capability of the disconnecting switch is weak, and the like, VFTO (Very fast transient overvoltage) is formed. When VFTO acts on the surface of the insulator, the insulator cannot dissipate charges, so that the insulator bears large direct current voltage, and further bears quite high transient voltage, and the electric field on the surface of the insulator is seriously distorted. In addition, in the GIS operation process, under the effect of VFTO, charges are introduced into the surface of the insulator, so that the electric field distribution of the insulator at the bus section in the operation process can generate serious distortion, the insulator surface flashover is easily caused, and further GIS equipment damage or large-area power failure of a power system is caused.
At present, for the measurement of the surface field intensity of an insulator under the action of VFTO in a GIS device, an ultrahigh frequency sensor is only mounted on a grounding shell, VFTO ultrahigh frequency electromagnetic wave signals are coupled, and the VFTO intensity and frequency are judged through subsequent analysis and processing. The method can only measure the VFTO component transmitted to the shell, cannot sense the VFTO frequency and intensity of the surface of the basin, and cannot directly measure the electric field of the electric field concentrated region on the surface of the insulator.
SUMMERY OF THE UTILITY MODEL
The application provides a GIS insulator surface transient state electric field measuring device to solve the problem that unable direct measurement insulator surface electric field.
A GIS insulator surface transient electric field measuring device comprises: the device comprises a processing unit and a measuring unit, wherein the processing unit comprises an SLD (super luminescent diode), a polarizer, a polarization beam splitter, an optical receiver and an oscilloscope; the measuring unit comprises a sensor; wherein,
the SLD is connected with the polarizer, the polarizer is connected with the sensor, the sensor is connected with the polarization beam splitter, the polarization beam splitter is connected with the optical receiver, and the optical receiver is connected with the oscilloscope.
Optionally, the polarizer is connected to the sensor through a first polarization maintaining fiber, and the sensor is connected to the polarization beam splitter through a second polarization maintaining fiber.
Optionally, the lengths of the first polarization maintaining fiber and the second polarization maintaining fiber are any value between 30 and 70 meters.
Optionally, a first polarization-preserving tail fiber is further connected between the first polarization-preserving fiber and the sensor; and a second polarization-maintaining tail fiber is connected between the sensor and the second polarization-maintaining optical fiber.
Optionally, the cross sections of the first polarization-maintaining pigtail and the second polarization-maintaining pigtail are in an L-shaped structure.
Optionally, a first flange and a second flange are respectively arranged on two sides of the sensor, and a joint of the first polarization maintaining fiber and the first polarization maintaining tail fiber is fixed on the first flange; and the joint of the second polarization maintaining optical fiber and the second polarization maintaining tail fiber is fixed on the second flange.
Optionally, the sensor is a photoelectric integrated electric field sensor.
The technical scheme provided by the application comprises the following beneficial technical effects:
the GIS insulator surface transient electric field measuring device provided by the embodiment of the application firstly forms linearly polarized light through the SLD and the polarizer, when the linearly polarized light enters the sensor, a phase modulation signal is obtained under the action of the insulator surface electric field and the sensor, and the phase modulation signal is converted into a pair of intensity modulation signals through the polarization beam splitter. The intensity modulation signal is processed by the optical receiver to form a voltage signal, and the voltage signal is finally collected and displayed by the oscilloscope. The device can directly measure the surface electric field of the insulator, obtains data such as the strength and the frequency of the surface electric field of the insulator, can cover the high-frequency pulse of 100 MHz-1 GHz in the measuring range, and has higher precision and simple operation compared with the traditional VFTO testing device.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a schematic structural diagram of a GIS insulator surface transient electric field measurement apparatus according to an embodiment of the present application.
Fig. 2 is a schematic diagram of an M-Z interferometer provided in an embodiment of the present application.
Fig. 3 is a schematic structural diagram of an optoelectronic integrated electric field sensor according to an embodiment of the present application.
Description of reference numerals:
1. a processing unit; 11. SLD; 12. a polarizer; 13. a polarizing beam splitter; 14. an optical receiver; 15. an oscilloscope; 2. a measuring unit; 20. a sensor; 21. an optoelectronic chip; 22. an optical waveguide; 23. y-shaped bifurcation; 24. an electrode; 3. a first polarization maintaining fiber; 4. a second polarization maintaining fiber; 5. a first polarization maintaining pigtail; 6. a second polarization maintaining pigtail; 7. a first flange; 8. a second flange.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a GIS insulator surface transient electric field measurement apparatus according to an embodiment of the present application. Referring to fig. 1, the apparatus comprises a processing unit 1 and a measuring unit 2, the measuring unit 2 being in a magnetic field environment and the processing unit 1 being in a magnetic field isolation environment.
The processing unit 1 includes an SLD11(Semiconductor Laser), a polarizer 12, a polarization beam splitter 13, an optical receiver 14, and an oscilloscope 15; the measuring unit 2 comprises a sensor 20. Wherein, the SLD11 is connected to the polarizer 12, the polarizer 12 is connected to the sensor 20, the sensor 20 is connected to the polarization beam splitter 13, the polarization beam splitter 13 is connected to the optical receiver 14, and the optical receiver 14 is connected to the oscilloscope 15.
Specifically, the SLD11 is connected to the polarizer 12 through an optical cable, the polarizer 12 is connected to the sensor 20 through a first polarization maintaining fiber 3, the sensor 20 is connected to the polarization beam splitter 13 through a second polarization maintaining fiber 4, the polarization beam splitter 13 is connected to the optical receiver 14 through two optical cables, and the optical receiver 14 is connected to the oscilloscope 15 through a USB (Universal serial bus).
In addition, optionally, a first polarization maintaining pigtail 5 is further connected between the first polarization maintaining fiber 3 and the sensor 20, one end of the first polarization maintaining pigtail 5 is connected to the first polarization maintaining fiber 3, and the other end of the first polarization maintaining fiber 3 is connected to the sensor 20. A second polarization-maintaining pigtail 6 is further connected between the sensor 20 and the second polarization-maintaining fiber 4, one end of the second polarization-maintaining pigtail 6 is connected with the sensor 20, and the other end of the second polarization-maintaining pigtail 6 is connected with the second polarization-maintaining fiber 4.
The polarization maintaining pigtail is a connector for the polarization maintaining fiber and the sensor 20. One end of the polarization-maintaining tail fiber is provided with a joint so as to be connected with the sensor 20, and the other end of the polarization-maintaining tail fiber is connected with the polarization-maintaining fiber in a fusion mode.
Alternatively, the length of the first polarization maintaining fiber 3 and the second polarization maintaining fiber 4 may be any value between 30 and 70 meters, for example 50 meters.
Optionally, the cross sections of the first polarization-maintaining pigtail 5 and the second polarization-maintaining pigtail 6 are in an "L" shape.
Optionally, a first flange 7 and a second flange 8 are respectively arranged on two sides of the sensor 20, and a joint of the first polarization maintaining fiber 3 and the first polarization maintaining pigtail 5 is fixed on the first flange 7; the junction of the second polarization maintaining fiber 4 and the second polarization maintaining pigtail 6 is fixed on the second flange 8.
In this application, the SLD11 is used to generate a laser signal and transmit the laser through a fiber optic cable to polarizer 12.
The polarizer 12 is used for converting the laser signal generated by the SLD11 into linearly polarized light. Specifically, a polarizing plate is arranged in the polarizer 12, and when laser light passes through the polarizing plate, light in the laser light with the same vibration direction as the polarization direction of the polarizing plate can pass through the polarizing plate to form linearly polarized light. The linearly polarized light is transmitted to the first polarization maintaining pigtail 5 through the first polarization maintaining fiber 3, and further transmitted to the sensor 20. In the transmission process of polarized light, the polarization maintaining optical fiber and the polarization maintaining tail fiber can ensure that the linear polarization direction is unchanged, and the coherent signal-to-noise ratio is improved, so that the high-precision measurement of physical quantity is realized.
The sensor 20 is used for being placed in a measured electric field and converting an electric field signal into an optical power signal. Optionally, the sensor 20 is an opto-electronic integrated electric field sensor 20. The basic principle of the opto-electronic integrated electric field sensor 20 is the linear electro-optic effect, for example, an M-Z interferometer, as shown in particular in fig. 2. The optical signal to be measured is divided into two paths of optical signals by the photoelectric integrated electric field sensor 20, one path of optical signal is delayed by the long optical fiber, the other path of optical signal passes through the polarization controller and is combined with the first path of optical signal to generate interference, and the output light is self-homodyne modulation light. The signal-to-noise ratio of the intensity modulated light can be improved by changing the polarization direction of the polarization controller, and in addition, the longer the delay of the delay optical fiber is, the smaller the line width can be measured.
Based on the principle of M-Z interferometer, the embodiment of the present application provides an optoelectronic integrated electric field sensor 20, as shown in fig. 3. The optical electric field integrated sensor 20 comprises a lithium niobate photoelectric wafer 221, two optical waveguides 22 parallel to each other are arranged in the middle of the photoelectric wafer 21, two Y-shaped branches 23 are respectively arranged on two of the optical waveguides 22, and electrodes 24 are arranged on two sides of one optical waveguide 22 and used for shielding the action of an external electric field on the section of the optical waveguide 22. The Y-branch at the input end splits the input line polarized light into two equal-success beams, which are sent to the two optical waveguides 22, respectively. Due to the action of the external electric field, the refractive index of the optical waveguide 22 for arranging the external electrode 24 will change, and the linearly polarized light transmitted in the two optical waveguides 22 will generate a phase difference, so as to obtain a phase modulation signal, wherein the phase modulation signal comprises a fast optical signal and a slow optical signal. The linearly polarized light in the two optical waveguides 22 interferes at the output end due to different phases, the output optical power and the input optical power satisfy a certain corresponding relationship, under an ideal condition, the output optical power and the electric field to be measured are in a linear relationship, and the electric field data to be measured can be obtained after the optical power data are processed by detecting the output optical power.
The polarization beam splitter 13 is operative to modulate the phase modulated signal transmitted back through the sensor 20 to obtain a pair of intensity modulated signals, and to transmit the signals to the optical receiver 14. The optical receiver 14 performs photoelectric conversion on the pair of intensity modulation signals, converts the intensity modulation signals into voltage signals, and finally acquires and displays the voltage signals through an oscilloscope 15 to obtain the surface electric field data of the insulator.
In summary, in the present embodiment, linearly polarized light is first formed by SLD11 and the polarizer, and when the linearly polarized light enters the sensor 20, a phase modulation signal is obtained under the action of the surface electric field of the insulator and the sensor 20, and the phase modulation signal is converted into a pair of intensity modulation signals through the polarization beam splitter 13. The intensity modulation signal is processed by the optical receiver 14 to form a voltage signal, and the voltage signal is finally collected and displayed by the oscilloscope 15 to obtain insulator surface electric field data including the intensity, frequency and the like of the insulator surface electric field.
The device can be directed against insulator surface electric field concentrated region electric field direct measurement, obtains data such as intensity and frequency of insulator surface electric field to measuring range can cover 100 MHz-1G Hz's high frequency pulse, has higher precision, easy operation compared with traditional VFTO testing arrangement.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
It will be understood that the present application is not limited to what has been described above and shown in the accompanying drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
Claims (7)
1. The utility model provides a GIS insulator surface transient state electric field measuring device which characterized in that includes: the device comprises a processing unit (1) and a measuring unit (2), wherein the processing unit (1) comprises an SLD (11), a polarizer (12), a polarization beam splitter (13), an optical receiver (14) and an oscilloscope (15); the measuring unit (2) comprises a sensor (20); wherein,
SLD (11) with polarizer (12) are connected, polarizer (12) with sensor (20) are connected, sensor (20) with polarization beam splitter (13) are connected, polarization beam splitter (13) with light receiver (14) are connected, light receiver (14) with oscilloscope (15) are connected.
2. The GIS insulator surface transient electric field measurement device according to claim 1, wherein the polarizer (12) and the sensor (20) are connected by a first polarization maintaining fiber (3), and the sensor (20) and the polarization beam splitter (13) are connected by a second polarization maintaining fiber (4).
3. The GIS insulator surface transient electric field measurement device according to claim 2, wherein the length of the first polarization maintaining fiber (3) and the second polarization maintaining fiber (4) is any value between 30-70 meters.
4. The GIS insulator surface transient electric field measurement device of claim 2 or 3, wherein a first polarization maintaining pigtail (5) is further connected between the first polarization maintaining fiber (3) and the sensor (20); and a second polarization-maintaining tail fiber (6) is connected between the sensor (20) and the second polarization-maintaining optical fiber (4).
5. The GIS insulator surface transient electric field measuring device of claim 4, wherein the cross section of the first polarization maintaining tail fiber (5) and the second polarization maintaining tail fiber (6) is in an L-shaped structure.
6. The GIS insulator surface transient electric field measuring device according to claim 4, wherein the sensor (20) is provided with a first flange (7) and a second flange (8) on two sides, respectively, and the connection position of the first polarization maintaining fiber (3) and the first polarization maintaining tail fiber (5) is fixed on the first flange (7); the joint of the second polarization-maintaining fiber (4) and the second polarization-maintaining tail fiber (6) is fixed on the second flange (8).
7. The GIS insulator surface transient electric field measurement device of claim 1, wherein the sensor (20) is a photoelectric integrated electric field sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721114211.3U CN207096345U (en) | 2017-09-01 | 2017-09-01 | A kind of GIS insulator surfaces Transient Electric Field measurement apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721114211.3U CN207096345U (en) | 2017-09-01 | 2017-09-01 | A kind of GIS insulator surfaces Transient Electric Field measurement apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207096345U true CN207096345U (en) | 2018-03-13 |
Family
ID=61540434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721114211.3U Active CN207096345U (en) | 2017-09-01 | 2017-09-01 | A kind of GIS insulator surfaces Transient Electric Field measurement apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207096345U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812572A (en) * | 2020-07-28 | 2020-10-23 | 云南电网有限责任公司电力科学研究院 | External VFTO measurement calibration system |
| CN111830311A (en) * | 2020-07-28 | 2020-10-27 | 云南电网有限责任公司电力科学研究院 | External non-contact VFTO signal measuring device |
-
2017
- 2017-09-01 CN CN201721114211.3U patent/CN207096345U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111812572A (en) * | 2020-07-28 | 2020-10-23 | 云南电网有限责任公司电力科学研究院 | External VFTO measurement calibration system |
| CN111830311A (en) * | 2020-07-28 | 2020-10-27 | 云南电网有限责任公司电力科学研究院 | External non-contact VFTO signal measuring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1844941B (en) | Photoelectric integrated strong electric field measuring system | |
| CN1844942B (en) | Photoelectric integrated sensor for strong electric field measurement | |
| US8861899B2 (en) | Optical fiber current transformer with optical fiber temperature acquisition and temperature compensation | |
| CN101109771A (en) | Analog signal separating and transferring system used for high voltage measuring | |
| CN207096345U (en) | A kind of GIS insulator surfaces Transient Electric Field measurement apparatus | |
| Takahashi et al. | Field test of DC optical current transformer for HVDC link | |
| Zhang et al. | 3D integrated optical E-field sensor for lightning electromagnetic impulse measurement | |
| CN103675391A (en) | Radial analyzer type optical voltage sensor | |
| CN1862264A (en) | Electrode antenna integrated photoelectric integrated sensor for testing strong electric field | |
| CN104635010A (en) | All-fiber optical current transformer detection system | |
| CN101251560A (en) | Coupled type photoelectricity integration sensor for electric field measurement | |
| CN102411080B (en) | Optical electric field sensor | |
| CN203164257U (en) | Flexible optical current transformer | |
| CN201749141U (en) | Full fiber current transformer | |
| CN101710138B (en) | Grid electrode photoelectric integrated sensor for measuring high electric field | |
| CN116359579A (en) | Reentrant all-fiber current transformer device and current measurement method thereof | |
| Tian et al. | An improved optically based PD detection system for continuous on-line monitoring of HV cables | |
| Guo et al. | Transient voltage measurement for UHV AC substation using non-contact electro-optic field sensor | |
| CN202330527U (en) | Optical electric field sensor | |
| CN208999539U (en) | A kind of breaker three-phase switching synchronization detection device | |
| CN205786792U (en) | A kind of all-fiber current transformator based on optical fiber temperature sensor | |
| US11486906B2 (en) | Voltage measuring device and gas-insulated switching apparatus | |
| CN109001517B (en) | All-fiber voltage sensing device based on manganese-doped quartz fiber | |
| CN203259266U (en) | Smart power grid plastic optical fiber temperature sensing system | |
| KR101098666B1 (en) | Optical Electric-Field Sensors |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |