CN108444525B - Wireless sensing measurement system for high-voltage transmission network equipment - Google Patents
Wireless sensing measurement system for high-voltage transmission network equipment Download PDFInfo
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- CN108444525B CN108444525B CN201810203058.4A CN201810203058A CN108444525B CN 108444525 B CN108444525 B CN 108444525B CN 201810203058 A CN201810203058 A CN 201810203058A CN 108444525 B CN108444525 B CN 108444525B
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- Prior art keywords
- optical fiber
- wireless
- solar cell
- measurement system
- focusing lens
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a wireless sensing measurement system for high-voltage power transmission network equipment, which comprises a solar cell panel, a focusing lens, an input optical fiber bundle, an output optical fiber bundle, a sensing head, a photoelectric detector, a driving circuit and a wireless transmitting unit, wherein the solar cell panel is arranged on the solar cell panel; the ground transmitting and receiving unit comprises a laser, a control circuit and a wireless receiving unit, the laser is just opposite to the solar cell panel and the focusing lens to be incident, and the control circuit controls the wireless receiving unit to receive the measurement data transmitted by the wireless transmitting unit. The invention adopts the optical fiber sensor to measure the parameters of the high-voltage transmission network equipment, the sensing head is arranged in the equipment and is all optical devices, the leaked electrical devices are arranged in the shielded remote measuring case, the influence on the electric field parameters generated by the measured object can be avoided, and meanwhile, the optical fiber sensor is not influenced by the electromagnetic interference of the measured object.
Description
Technical Field
The invention belongs to the technical field of sensing measurement, and relates to a measurement system for power supply and data wireless transmission of a laser solar cell.
Background
In the construction of a high-voltage transmission line network, parameters of high-voltage transmission equipment need to be monitored, for example, parameters such as the temperature and the output voltage of some components and the liquid level of oil in an internal transformer need to be measured to reflect whether a monitored object is normal or not. Because these devices belong to high voltage devices, in order to enable the sensor itself not to affect the electrical output of the devices, and simultaneously, the high power high voltage devices do not affect the measurement of the sensor, the parameter measurement is usually realized by adopting an active optical fiber sensor, for example, a transformer oil level height sensor, a temperature sensor and the like all need to introduce laser into a sensitive unit by an optical fiber for optical modulation, and then the modulated light is introduced into a photoelectric detector by the optical fiber for signal extraction and analysis. Because the devices are in the field high air with dozens of meters to dozens of meters, the change range of the environmental temperature is large, the power supply and data acquisition of the sensor are inconvenient to operate, new measurement technology research and measurement system development are urgently needed to be developed, and the practical application problem is solved.
Disclosure of Invention
The invention provides a wireless sensing measurement system for high-voltage transmission network equipment, which solves the technical problem of parameter monitoring of high-altitude medium-high voltage transmission network equipment.
The technical scheme of the invention is as follows:
a wireless sensing measurement system for high-voltage transmission network equipment comprises a solar cell panel, a focusing lens, an input optical fiber bundle, an output optical fiber bundle, a sensing head, a photoelectric detector, a driving circuit and a wireless transmitting unit; the sensing head is arranged in the monitored equipment, the photoelectric detector, the driving circuit and the wireless transmitting unit are arranged in the remote measuring case, the solar panel is arranged on one outer surface of the remote measuring case, and the focusing lens is arranged at the center of the solar panel; an optical fiber beam combiner matched with the position of the focusing lens is arranged in the remote measurement case; the focusing lens converges the laser incident on the surface of the solar cell panel to the optical fiber beam combiner; the input optical fiber bundle is connected between the optical fiber beam combiner and the sensing head, the output optical fiber bundle is connected between the sensing head and the photoelectric detector, and the driving circuit is electrically connected with the photoelectric detector and the wireless transmitting unit respectively.
Furthermore, the back of the solar cell panel is provided with a radiating fin.
Further, the wireless transmitting unit includes a Zigbee transmitting and receiving module and peripheral devices.
Further, the photoelectric detector is an InGaAs detector.
Furthermore, the remote measurement case is a shielding case.
The invention has the following beneficial technical effects:
1. the invention adopts the optical fiber sensor to measure the parameters of the high-voltage transmission equipment, the sensing head is arranged in the equipment and is all optical devices, and the external leakage electrical device is arranged in the shielded remote measuring case, thereby avoiding the influence on the electric field parameters generated by the measured object, and simultaneously, the optical fiber sensor is not influenced by the electromagnetic interference of the measured object.
2. The invention adopts the laser irradiation of the solar cell panel in the high altitude on the ground to realize the power supply of the remote sensing head and the detector, thereby ensuring that the whole optical fiber sensor adopts the battery for power supply, effectively isolating the sensor from the ground wire of the high voltage transmission equipment to be tested in the actual work, avoiding the influence of common ground crosstalk, simultaneously reducing the noise of a measuring unit and improving the signal to noise ratio; on the other hand, when the laser is adopted to monitor data at ordinary times, the irradiation of the solar cell with higher power density than sunlight is realized, the power supply time can be artificially controlled, meanwhile, the size of the solar cell panel is reduced, the structure miniaturization of a measuring system is facilitated, the solar cell only works when the measurement is needed, and the service life of the solar cell panel is effectively prolonged.
3. Compared with other active optical fiber sensors, the sensor of the invention saves an independent L ED light source or laser which needs to work in a wide temperature environment, further saves the cost and plays a double role.
Drawings
FIG. 1 is a schematic diagram of a remote power supply and wireless transmission measurement system of the present invention;
FIG. 2 is a schematic diagram of a receiving unit of the present invention;
FIG. 3 is a schematic diagram of the components of a solar cell and a focusing lens of the receiving unit of the present invention;
fig. 4 shows an embodiment of the oil level sensor according to the invention.
The reference signs are:
1-solar panel; 2-a focusing lens; 3-a sensor head; 4-monitored equipment; 5, inputting an optical fiber bundle; 6, outputting the optical fiber bundle; 7-a photodetector; 8-remote measurement chassis; 9-a wireless transmitting unit; 10-an optical fiber combiner; 11-a transmitting antenna; 13-a strut; 15-a drive circuit; 17-a circuit board; 18-a heat sink; 21-a laser; 22-a control circuit; 23-a moving mechanism; 24-a wireless receiving unit; 25-a receiving antenna; 30-a fuel tank; 31-a transparent window; 32-an optical fiber; 33-optical fiber interface; 34-medium oil.
Detailed Description
As shown in fig. 1-3, the wireless sensing measurement system for high voltage transmission network equipment of the present invention comprises a remote measurement unit and a ground transmitting and receiving unit;
the remote measuring unit comprises a solar cell panel 1, a focusing lens 2, an input optical fiber bundle 5, an output optical fiber bundle 6, a sensing head 3, a photoelectric detector 7, a driving circuit 15 and a wireless transmitting unit 9 which are arranged at the far end of a high-altitude supporting rod 13, wherein the optical fiber sensing head 3 is arranged inside monitored equipment 4, such as an optical fiber temperature sensor, an oil surface sensor, a voltage sensor, an optical fiber current transformer and the like, the sensors need to introduce laser or L ED light into the sensing head 3 through optical fibers, then the result is obtained through measurement, and a modulated optical signal is transmitted to the photoelectric detector 7 through the optical fibers, and electric driving devices such as the photoelectric detector 7, the driving circuit and the wireless transmitting unit 9 are arranged in a remote measuring case 8 for electromagnetic shielding.
The solar cell panel 1 is arranged on one outer surface of the remote measurement case 8, and the focusing lens 2 is arranged at the center of the solar cell panel 1; an optical fiber beam combiner 10 matched with the focusing lens 2 is arranged in the remote measurement case 8, and when laser on the ground is incident to the solar cell panel 1, light can be converged on the optical fiber beam combiner 10 through the focusing lens 2 to provide a light source for the sensing head 3. The input optical fiber bundle 5 is connected between the optical fiber combiner 10 and the sensing head 3, the output optical fiber bundle 6 is connected between the sensing head 3 and the photoelectric detector 7, and the driving circuit 15 is respectively electrically connected with the photoelectric detector 7 and the wireless transmitting unit 9; the driving circuit 15 realizes the driving of the photoelectric detector and simultaneously transmits the signal to a long distance through the wireless transmitting unit 9.
The ground transmitting and receiving unit comprises a laser 21, a control circuit 22 and a wireless receiving unit 24, the laser 21 can realize incidence in the direction perpendicular to the solar panel 1, and irradiates the solar panel 1 and the focusing lens 2 after beam expansion, the control circuit 22 controls the laser to transmit laser on one hand, and controls the wireless receiving unit 24 to receive measurement data transmitted by the wireless transmitting unit 9 on the other hand. The wireless transmitting unit 9 and the wireless receiving unit 24 are both composed of a Zigbee transmitting and receiving module and peripheral devices, and can realize wireless transmission and reception of data within a certain distance, and can be used in right pairs with a laser. Wherein the laser is selected from the near infrared band of 800-900nm, and the detector is selected from InGaAs detector.
In order to compress the volume and meet the requirement of system miniaturization, the area of a solar cell is far smaller than that of a common solar panel, mainly the power density of a receiving laser is also far higher than that of solar energy, but the laser is converted into electric energy and brings heat effect, so as shown in fig. 2, a radiating fin 18 is arranged on the back surface of the solar panel 1 to guide out heat generated by unconverted solar energy. The heat sink needs to be closely attached to the solar cell and ensure heat dissipation of the system through a special structural design. In addition, the driving circuit 15 further comprises a voltage filtering and shaping circuit and a voltage stabilizing circuit, so as to meet the requirement on the stability of the power supply.
The ground transmitting and receiving unit can be arranged on the moving mechanism 23 or be vehicle-mounted, when performance monitoring needs to be carried out on a high-voltage device in a certain altitude, the ground transmitting and receiving unit is pulled to the lower part of the device through a trolley, the laser outputs laser, when a far-end measuring system supplies power, the sensing head inputs light sources, internal parameter measurement of the measured device is achieved, then the measuring result is transmitted to the vehicle-mounted ground transmitting and receiving unit in a wireless transmission mode, and after the measurement is finished, the device moves to a next target point.
Fig. 4 shows an example of using an optical fiber sensor to detect the oil level of a transformer inside a device, in which an input optical fiber interface 33 and an output optical fiber interface 35 are respectively disposed at two corresponding transparent windows 31 of an oil tank 30, the input optical fiber interface 33 is connected to an optical fiber combiner 10 through an optical fiber 32, the output optical fiber interface 35 is connected to a detector 7 through an optical fiber 32, and after an incident laser is coupled to the optical fiber combiner 10, the incident laser is incident to the output optical fiber interface 35 through the input optical fiber interface 33 and is then coupled to the detector through the optical fiber 32. When the oil level is lowered from the position above the optical fiber interface to the position below the optical fiber interface, the attenuation and absorption of the medium oil 34 to the optical signal can cause the change of the detector signal from nothing to nothing, so that the alarm of the oil level is realized.
The multi-parameter measuring system realizes the remote monitoring of a plurality of parameters of a high-voltage transmission line network and pulse power equipment, and meets the requirements of the special environment and working conditions.
Claims (5)
1. A wireless sensing measurement system for high voltage transmission network equipment, characterized by: the device comprises a solar cell panel (1), a focusing lens (2), an input optical fiber bundle (5), an output optical fiber bundle (6), a sensing head (3), a photoelectric detector (7), a driving circuit (15) and a wireless transmitting unit (9); the sensing head (3) is an active optical fiber sensor;
the sensing head (3) is arranged inside the monitored equipment (4), the photoelectric detector (7), the driving circuit and the wireless transmitting unit (9) are arranged in the remote measuring case (8), the solar panel (1) is arranged on one outer surface of the remote measuring case (8), and the focusing lens (2) is arranged at the center of the solar panel (1); an optical fiber beam combiner (10) matched with the focusing lens (2) in position is arranged in the remote measurement case (8), and the focusing lens (2) converges laser incident on the surface of the solar panel (1) to the optical fiber beam combiner (10) to provide a light source for the active optical fiber sensor; the input optical fiber bundle (5) is connected between the optical fiber beam combiner (10) and the sensing head (3), the output optical fiber bundle (6) is connected between the sensing head (3) and the photoelectric detector (7), and the driving circuit (15) is electrically connected with the photoelectric detector (7) and the wireless transmitting unit (9) respectively.
2. A wireless sensing measurement system for grid equipment according to claim 1, wherein: the back of the solar cell panel (1) is provided with a radiating fin (18).
3. A wireless sensing measurement system for grid equipment according to claim 1, wherein: the wireless transmitting unit (9) comprises a Zigbee transmitting and receiving module and peripheral devices.
4. A wireless sensing measurement system for grid equipment according to claim 1, wherein: the photoelectric detector (7) is an InGaAs detector.
5. A wireless sensing measurement system for grid equipment according to claim 1, wherein: the remote measurement case (8) is a shielding case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810203058.4A CN108444525B (en) | 2018-03-13 | 2018-03-13 | Wireless sensing measurement system for high-voltage transmission network equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810203058.4A CN108444525B (en) | 2018-03-13 | 2018-03-13 | Wireless sensing measurement system for high-voltage transmission network equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108444525A CN108444525A (en) | 2018-08-24 |
| CN108444525B true CN108444525B (en) | 2020-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810203058.4A Expired - Fee Related CN108444525B (en) | 2018-03-13 | 2018-03-13 | Wireless sensing measurement system for high-voltage transmission network equipment |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201748982U (en) * | 2010-07-08 | 2011-02-16 | 上海康阔光通信技术有限公司 | Temperature sensor used for high-voltage power system |
| WO2014127788A1 (en) * | 2013-02-25 | 2014-08-28 | Isabellenhütte Heusler Gmbh & Co. Kg | Measuring system having several sensors and having a central evaluating unit |
| CN203811765U (en) * | 2014-05-17 | 2014-09-03 | 国家电网公司 | Power transmission line insulator flashover monitoring device |
| US10151895B2 (en) * | 2014-08-13 | 2018-12-11 | Altec Industries, Inc. | System and method of transmitting electricity through an insulated environment |
| CN104991105A (en) * | 2015-07-14 | 2015-10-21 | 国家电网公司 | Remote-energy-supply high-voltage line current sensing detection system based on optical fiber |
| CN105510234A (en) * | 2015-12-31 | 2016-04-20 | 合肥知常光电科技有限公司 | Optical fiber sensing-based laser excitation heat wave signal detection device |
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Granted publication date: 20200807 Termination date: 20210313 |