CN111562463A - GIL fault positioning system and method based on optical fiber communication - Google Patents
GIL fault positioning system and method based on optical fiber communication Download PDFInfo
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- CN111562463A CN111562463A CN202010393157.0A CN202010393157A CN111562463A CN 111562463 A CN111562463 A CN 111562463A CN 202010393157 A CN202010393157 A CN 202010393157A CN 111562463 A CN111562463 A CN 111562463A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/11—Locating faults in cables, transmission lines, or networks using pulse reflection methods
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Abstract
The invention discloses a GIL fault positioning system and method based on optical fiber communication, wherein the GIL fault positioning system comprises a GIL guide rod, a GIL shell and a basin-type insulator, the GIL guide rod is arranged in the GIL shell through the basin-type insulator, the system also comprises a first hand hole, a second hand hole, a first transient overvoltage sensor, a second transient overvoltage sensor, a first low-voltage arm capacitor, a second low-voltage arm capacitor, a first field acquisition unit, a first optical switching network device, a second field acquisition unit, a second optical switching network device, a third optical switching network device, a fourth optical switching network device, a router and an industrial personal computer, the GIL fault positioning system and method based on optical fiber communication provided by the invention reduce the cost of the positioning system, and obtain the fault point of the GIL by calculating the time difference of a pulse signal, so that the fault positioning is accurate, and the state maintenance efficiency of the electric power system is improved, the on-line monitoring effectiveness of the transient overvoltage is effectively improved.
Description
Technical Field
The invention relates to the field of ultra-high voltage and extra-high voltage power transmission and transformation equipment state monitoring, in particular to a GIL fault positioning system and method based on optical fiber communication.
Background
Gas insulated transmission line (GIL) is a mature high-voltage transmission device, has the characteristics of large transmission capacity, small loss, small occupied area, high reliability and suitability for severe environments, and is widely applied to occasions with large altitude drop, severe terrain and meteorological conditions or large transmission capacity. The GIL is long in distance and totally closed, monitoring system equipment is lacked, and internal faults are mainly flashover along the surface of the basin-type insulator and ground breakdown faults of the GIL guide rod. Because the safe and stable operation of the power system is seriously influenced by the fault of the GIL, the positioning and fault problem elimination after the fault is very important, and a simple, convenient, low-cost, reliable and effective method for detecting the GIL fault and accurately positioning the fault position is urgently needed to be found at present when the construction scale of the GIL in China is further enlarged.
Currently, the GIL fault positioning method mainly includes a gas detection method, an ultrasonic positioning method, an optical time domain reflection positioning method and a traveling wave-based positioning method.
The gas detection method monitors the operation state of the GIL facility by monitoring the gas density inside the GIL facility. The insulation properties are closely related to the density inside the pipe. The density of the gas is dependent on density and pressure, and by measuring the gas pressure and temperature to calculate the density required for high voltage insulation, the monitoring system will give an alarm when the gas density drops.
The ultrasonic positioning method is to use ultrasonic signals in the GIL for positioning, the ultrasonic waves excited by partial discharge in the GIL can be regarded as being transmitted to the periphery in a point source mode, and the ultrasonic waves have stronger directivity and more concentrated energy due to shorter wavelength, and the ultrasonic signals generated during discharge can be collected by the ultrasonic sensor on the outer wall and analyzed.
The optical time domain reflectometry positioning method positions the GIL fault by using the vibration signal. The GIL flashover fault can simultaneously cause severe vibration of the cavity shell, the highest frequency component of a vibration signal can reach over 100kHz, the phi-OTDR and the optical interference technology are realized through a wavelength division multiplexing technology and a unified optical path structure, and the positioning of the vibration signal caused by the GIL insulator flashover fault is completed.
When a discharge fault occurs in the GIL, a steep traveling wave discharge voltage is generated, and the rise time is several ns to tens of ns. And arranging a transient overvoltage sensor at each of two ends of the GIL pipeline, synchronously measuring and recording the arrival time of steep waves through GPS time, recording the waveform of steep traveling wave signals by using a data acquisition card, and analyzing the arrival time difference of the steep traveling wave signals at two ends of the GIL and the total length of the GIL to calculate and obtain the discharge fault position.
However, the gas detection positioning method can reflect early gas leakage fault of the GIL equipment through gas density; in the ultrasonic positioning method, the energy loss of ultrasonic signals is large, and each section of GIL is required to be provided with a sensor, so that the cost is high.
In the optical time domain reflection positioning method, the optical fiber is easy to damage, the detection distance is short, and the cost of a light source and a demodulation system is high.
The positioning method based on the traveling wave has the advantages of simple sensor installation, accurate monitoring result and high spatial resolution. The method comprises the steps of installing sensors at two ends of each phase GIL based on a traveling wave positioning method, transmitting signals to a GPS synchronization unit at the side, and calculating time difference through pulse per second signals output by the GPS at the two ends so as to obtain a fault positioning result. However, the GPS devices are disposed at both ends of each phase GIL, which is expensive.
Therefore, how to design a system and a method for positioning the GIL fault, which have low cost and accurate fault positioning, becomes an urgent problem to be solved.
Disclosure of Invention
The invention provides a GIL fault positioning system and method based on optical fiber communication, which aim to solve the problems of high cost and inaccurate fault positioning of the conventional GIL fault positioning system and method.
In a first aspect, the present invention provides a GIL fault locating system based on optical fiber communication, the GIL fault locating system including a GIL guide rod, a GIL housing, and a basin insulator, the GIL guide rod being disposed in the GIL housing through the basin insulator, the system further including a first hand hole, a second hand hole, a first transient overvoltage sensor, a second transient overvoltage sensor, a first low-voltage arm capacitor, a second low-voltage arm capacitor, a first field acquisition unit, a first optical switching network device, a second field acquisition unit, a second optical switching network device, a third optical switching network device, a fourth optical switching network device, a router, and an industrial personal computer, wherein:
the first hand hole and the second hand hole are respectively arranged at two ends of the GIL shell;
the first transient overvoltage sensor is arranged in the first hand hole, and the second transient overvoltage sensor is arranged in the second hand hole;
the first low-voltage arm capacitor is connected with the first transient overvoltage sensor, and the second low-voltage arm capacitor is connected with the second transient overvoltage sensor;
the first field acquisition unit is connected with the first low-voltage arm capacitor, and the second field acquisition unit is connected with the second low-voltage arm capacitor;
the first field acquisition unit is connected with the third optical network switching device through the first optical network switching device, and the second field acquisition unit is connected with the fourth optical network switching device through the second optical network switching device;
and the third optical network switching equipment and the fourth optical network switching equipment are both connected with the router, and the router is connected with the industrial personal computer.
Optionally, the first field acquisition unit and the second field acquisition unit both include a waveform recorder, a pulse signal output device and a power supply, and the waveform recorder of the first field acquisition unit is connected to the first low-voltage arm capacitor; the waveform recorder of the second field acquisition unit is in capacitive connection with the second low-voltage arm; the waveform recorder is connected with the pulse signal output device, both the waveform recorder and the pulse signal output device are connected with the power supply, and the pulse signal output device of the first field acquisition unit is connected with the first optical switching network equipment; the pulse signal output device of the second field acquisition unit is connected with the second optical network switching equipment, wherein:
the waveform recorder is used for receiving signals of the first low-voltage arm capacitor and the second low-voltage arm capacitor, recording waveforms and inputting the waveforms into the pulse signal output device;
the pulse signal outputter is used for outputting a pulse signal to the router;
and the power supply is used for supplying power to the waveform recorder and the pulse signal output device.
Optionally, the waveform recorder is an oscilloscope or an acquisition card.
Optionally, the first low-voltage arm capacitor is connected to the first field acquisition unit through a coaxial cable;
and the second low-voltage arm capacitor is connected with the second field acquisition unit through a coaxial cable.
Optionally, the first field acquisition unit and the first optical network switching device, the first optical network switching device and the third optical network switching device, the third optical network switching device and the router, and the router and the industrial personal computer are all connected by optical fibers;
the second field acquisition unit is connected with the second optical network switching equipment room, the second optical network switching equipment room is connected with the fourth optical network switching equipment room, and the fourth optical network switching equipment room is connected with the router through optical fibers.
In a second aspect, the present invention provides a GIL fault location method based on optical fiber communication, including the following steps:
acquiring a discharge signal generated by a fault point through a first transient overvoltage sensor to obtain a first discharge signal;
acquiring a discharge waveform of a first discharge signal through a first field acquisition unit, and sending a pulse signal of the discharge waveform to a router;
the router receives the pulse signals, the router collects the pulse signals and sends the pulse signals to the industrial personal computer, and the industrial personal computer generates a timestamp and defines the timestamp as a moment;
generating a time stamp and waiting for a pulse signal of a second field acquisition unit;
the second transient overvoltage sensor acquires a discharge signal generated by a fault point to obtain a second discharge signal;
acquiring a discharge waveform of a second discharge signal through a second field acquisition unit, and sending a pulse forming signal of the discharge waveform to the router;
the router receives the pulse signals of the second field acquisition unit, and gathers the pulse signals and sends the pulse signals to the industrial personal computer;
and the industrial personal computer calculates the time difference of the two pulse signals to obtain the GIL fault position.
According to the technical scheme, the invention provides a GIL fault positioning system and a method based on optical fiber communication, when a first transient overvoltage sensor receives a GIL discharge fault signal, a discharge signal is transmitted to a first field acquisition unit, the first field acquisition unit records a waveform at the moment and sends a pulse signal to a router, the first field acquisition unit is converted into an optical signal through first optical network switching equipment, the optical signal is transmitted to second optical network equipment through an optical fiber, the second optical network switching equipment converts the optical signal into an electrical signal and transmits the electrical signal to the router, then the signal is collected and output to an industrial personal computer, the industrial personal computer receives the pulse signal sent by the first field acquisition unit, a time stamp is generated at the moment, the time stamp is defined as the moment, the collection of the discharge signal of the second transient overvoltage sensor and the output of the pulse signal of the second field acquisition unit are waited, and recording the time difference of the two pulse signals, and calculating to obtain a fault point. The GIL fault positioning system and method based on optical fiber communication provided by the invention have the advantages that the cost of the positioning system is reduced, and the fault point of the GIL is obtained by calculating the time difference of the pulse signal, so that the fault positioning is accurate, the state maintenance efficiency of the power system is improved, and the on-line transient overvoltage monitoring effectiveness is effectively improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, 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 inventive exercise.
Fig. 1 is a schematic structural diagram of a GIL fault location system based on optical fiber communication according to the present invention;
FIG. 2 is a connection diagram of a first field acquisition unit and a second acquisition unit of a GIL fault location system based on fiber-optic communication according to the present invention
Fig. 3 is a flowchart of a GIL fault locating method based on optical fiber communication according to the present invention;
fig. 4 is a schematic diagram of a fault location result of a GIL fault location system based on optical fiber communication according to the present invention.
Illustration of the drawings:
wherein, 1-GIL guide rod; 2-GIL outer shell; 3-a basin insulator; 4-first hand hole; 5-second hand hole; 6-a first transient overvoltage sensor; 7-a second transient overvoltage sensor; 8-first low-voltage arm capacitance; 9-a second low-voltage arm capacitance; 10-a first field acquisition unit; 11-a first optical switch network device; 12-a second field acquisition unit; 13-a second optical switch network device; 14-a third optical switch network device; 15-a fourth optical network switching device; 16-a router; 17-an industrial personal computer; 18-a waveform recorder; 19-a pulse signal output; 20-power supply.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described, and it will be appreciated by those skilled in the art that the present invention may be embodied without departing from the spirit and scope of the invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
The traveling wave-based GIL discharge fault location principle is that a fault point is identified by using a propagation time difference method between traveling wave signals at the fault occurrence moment. The total length of the GIL is L, the distance between a fault point and a sensor at one end of the GIL is x, the distance between the fault point and a sensor at the other end of the GIL is L-x, the time difference of the discharge fault traveling wave reaching the sensors at the two ends is t, the propagation speed of the discharge fault traveling wave in the GIL is v, the time of the discharge fault traveling wave reaching the sensor at one end of the GIL is t1, and the time of the discharge fault traveling wave reaching the sensor at one end of the GIL is t 2. Thus, there are:
the location of the discharge fault point can thus be obtained.
In a first aspect, referring to fig. 1, the present invention provides a GIL fault locating system based on optical fiber communication, the GIL fault locating system includes a GIL guide rod 1, a GIL housing 2, and a basin insulator 3, the GIL guide rod 1 is disposed in the GIL housing 2 through the basin insulator 3, the system further includes a first hand hole 4, a second hand hole 5, a first transient overvoltage sensor 6, a second transient overvoltage sensor 7, a first low-voltage arm capacitor 8, a second low-voltage arm capacitor 9, a first field acquisition unit 10, a first optical network converter 11, a second field acquisition unit 12, a second optical network converter 13, a third optical network converter 14, a fourth optical network converter 15, a router 16, and an industrial personal computer 17, wherein:
the first hand hole 4 and the second hand hole 5 are respectively arranged at two ends of the GIL shell 2;
the first transient overvoltage sensor 6 is installed in the first hand hole 4, and the second transient overvoltage sensor 7 is installed in the second hand hole 5; the first transient overvoltage sensor 6 and the second transient overvoltage sensor 7 are used for collecting GIL discharge fault traveling waves.
The first low-voltage arm capacitor 8 is connected with the first transient overvoltage sensor 6, and the second low-voltage arm capacitor 9 is connected with the second transient overvoltage sensor 7;
the first field acquisition unit 10 is connected with the first low-voltage arm capacitor 8, and the second field acquisition unit 12 is connected with the second low-voltage arm capacitor 9;
the first field acquisition unit 10 is connected to the third optical network switching device 14 through the first optical network switching device 11, and the second field acquisition unit 12 is connected to the fourth optical network switching device 15 through the second optical network switching device 13;
the third optical network switching device 14 and the fourth optical network switching device 15 are both connected with the router 16, and the router 16 is connected with the industrial personal computer 17.
Referring to fig. 2, optionally, each of the first field acquisition unit 10 and the second field acquisition unit 12 includes a waveform recorder 18, a pulse signal output 19 and a power supply 20, the waveform recorder 18 of the first field acquisition unit 10 is connected to the first low-voltage arm capacitor 8; the waveform recorder 18 of the second field acquisition unit 12 is connected to the second low-voltage arm capacitor 9; the waveform recorder 18 is connected with the pulse signal output device 19, both the waveform recorder 18 and the pulse signal output device 19 are connected with the power supply 20, and the pulse signal output device 19 of the first field acquisition unit 12 is connected with the first optical network switching device 11; the pulse signal output device 19 of the second field acquisition unit 12 is connected to the second optical network device 13, where:
the waveform recorder 18 is used for receiving the signals of the first low-voltage arm capacitor 8 and the second low-voltage arm capacitor 9, then recording the waveform, and inputting the waveform into the pulse signal outputter 19;
the pulse signal outputter 19 for outputting a pulse signal to the router 16;
the power supply 20 is used for supplying power to the waveform recorder 18 and the pulse signal output device 19.
Optionally, the waveform recorder 18 is an oscilloscope or an acquisition card.
Optionally, the first low-voltage arm capacitor 8 is connected to the first field acquisition unit 10 through a coaxial cable;
the second low-voltage arm capacitor 9 is connected with the second field acquisition unit 12 through a coaxial cable and used for transmitting electric signals.
Optionally, the first field acquisition unit 10 and the first optical network switching device 11, the first optical network switching device 11 and the third optical network switching device 14, the third optical network switching device 14 and the router 16, and the router 16 and the industrial personal computer 17 are all connected by optical fibers;
the second field acquisition unit 12 is connected to the second optical network switching device 13, the second optical network switching device 13 is connected to the fourth optical network switching device 15, and the fourth optical network switching device 15 is connected to the router 16 through optical fibers.
The optical fiber is used for converting the signals of the first field acquisition unit 10 and the second field acquisition unit 12 into optical signals and transmitting the optical signals to the router 16 through the optical fiber.
The GIL power transmission system is internally provided with a three-phase pipeline, each phase of two ends needs to be provided with a transient overvoltage sensor and an on-site acquisition unit, a plurality of on-site acquisition units need to be gathered through a router before being connected to an industrial personal computer, and then the router is connected with the industrial personal computer.
In a second aspect, referring to fig. 3 and 4, the present invention provides a GIL fault location method based on fiber optic communication, including the following steps:
s10: acquiring a discharge signal generated by a fault point through a first transient overvoltage sensor to obtain a first discharge signal;
s11: acquiring a discharge waveform of a first discharge signal through a first field acquisition unit, and sending a pulse signal of the discharge waveform to a router;
s12: the router receives the pulse signals, the router collects the pulse signals and sends the pulse signals to the industrial personal computer, the industrial personal computer generates a timestamp, and the timestamp is defined as 0 moment;
s13: generating a time stamp and waiting for a pulse signal of a second field acquisition unit;
s14: the second transient overvoltage sensor acquires a discharge signal generated by a fault point to obtain a second discharge signal;
s15: acquiring a discharge waveform of a second discharge signal through a second field acquisition unit, and sending a pulse forming signal of the discharge waveform to the router;
s16: the router receives the pulse signals of the second field acquisition unit, and gathers the pulse signals and sends the pulse signals to the industrial personal computer;
s17: and the industrial personal computer calculates the time difference of the two pulse signals to obtain the GIL fault position.
According to the technical scheme, when the first transient overvoltage sensor 6 receives a GIL discharge fault signal, a discharge signal is transmitted to the first field acquisition unit 10, the first field acquisition unit 10 records a waveform and sends a pulse signal to the router 16, the first field acquisition unit 10 is converted into an optical signal through the first optical network switching device 11 and transmits the optical signal to the second optical network installation device 13 through an optical fiber, the second optical network switching device 11 converts the optical signal into an electrical signal and transmits the electrical signal to the router 16, the optical signal is collected and then output to the industrial personal computer 17, the industrial personal computer 17 receives the pulse signal sent by the first field acquisition unit 10, a timestamp is generated at the moment, the time is defined as 0 moment, the collection of the discharge signal of the second transient overvoltage sensor 7 and the output of the pulse signal of the second field acquisition unit 12 are waited, and recording the time difference of the two pulse signals, and calculating to obtain a fault point. The GIL fault positioning system and method based on optical fiber communication provided by the invention have the advantages that the cost of the positioning system is reduced, and the fault point of the GIL is obtained by calculating the time difference of the pulse signal, so that the fault positioning is accurate, the state maintenance efficiency of the power system is improved, and the on-line transient overvoltage monitoring effectiveness is effectively improved.
The foregoing is merely a detailed description of the invention, and it should be noted that modifications and adaptations by those skilled in the art may be made without departing from the principles of the invention, and should be considered as within the scope of the invention.
Claims (6)
1. The utility model provides a GIL fault location system based on fiber communication, GIL fault location system includes GIL guide arm (1), GIL shell (2) and basin formula insulator (3), GIL guide arm (1) pass through basin formula insulator (3) set up in GIL shell (2), its characterized in that, the system still includes first hand hole (4), second hand hole (5), first transient state overvoltage sensor (6), second transient state overvoltage sensor (7), first low-voltage arm electric capacity (8), second low-voltage arm electric capacity (9), first on-the-spot collection unit (10), first light changes net equipment (11), second on-the-spot collection unit (12), second light changes net equipment (13), third light changes net equipment (14), fourth light changes net equipment (15), router (16) and industrial computer (17), wherein:
the first hand hole (4) and the second hand hole (5) are respectively arranged at two ends of the GIL shell (2);
the first transient overvoltage sensor (6) is installed in the first hand hole (4), and the second transient overvoltage sensor (7) is installed in the second hand hole (5);
the first low-voltage arm capacitor (8) is connected with the first transient overvoltage sensor (6), and the second low-voltage arm capacitor (9) is connected with the second transient overvoltage sensor (7);
the first field acquisition unit (10) is connected with the first low-voltage arm capacitor (8), and the second field acquisition unit (12) is connected with the second low-voltage arm capacitor (9);
the first field acquisition unit (10) is connected with the third optical network switching device (14) through the first optical network switching device (11), and the second field acquisition unit (12) is connected with the fourth optical network switching device (15) through the second optical network switching device (13);
and the third optical network switching equipment (14) and the fourth optical network switching equipment (15) are connected with the router (16), and the router (16) is connected with the industrial personal computer (17).
2. The GIL fault location system based on fiber optic communication of claim 1, wherein said first field acquisition unit (10) and said second field acquisition unit (12) each comprise a waveform recorder (18), a pulse signal output (19) and a power supply (20), said waveform recorder (18) of said first field acquisition unit (10) being connected to said first low-voltage arm capacitor (8); the waveform recorder (18) of the second field acquisition unit (12) is connected with the second low-voltage arm capacitor (9); the waveform recorder (18) is connected with the pulse signal output device (19), both the waveform recorder (18) and the pulse signal output device (19) are connected with the power supply (20), and the pulse signal output device (19) of the first field acquisition unit (12) is connected with the first optical network switching device (11); the pulse signal output (19) of the second field acquisition unit (12) is connected to the second optical network switching device (13), wherein:
the waveform recorder (18) is used for receiving signals of the first low-voltage arm capacitor (8) and the second low-voltage arm capacitor (9), then recording waveforms and inputting the waveforms into the pulse signal outputter (19);
the pulse signal outputter (19) for outputting a pulse signal to the router (16);
the power supply (20) is used for supplying power to the waveform recorder (18) and the pulse signal output device (19).
3. The GIL fault localization system based on fiber optic communication of claim 2, wherein said waveform recorder (18) is an oscilloscope or an acquisition card.
4. The fiber optic communication-based GIL fault location system of claim 1, wherein said first low-voltage arm capacitor (8) is connected to said first field acquisition unit (10) by a coaxial cable;
the second low-voltage arm capacitor (9) is connected with the second field acquisition unit (12) through a coaxial cable.
5. The GIL fault location system based on fiber communication according to claim 1, wherein the first field acquisition unit (10) is connected to the first optical network switching device (11), the first optical network switching device (11) is connected to the third optical network switching device (14), the third optical network switching device (14) is connected to the router (16), and the router (16) is connected to the industrial personal computer (17) via optical fibers;
the second field acquisition unit (12) is connected with the second optical network switching device (13), the second optical network switching device (13) is connected with the fourth optical network switching device (15), and the fourth optical network switching device (15) is connected with the router (16) through optical fibers.
6. A GIL fault location method based on optical fiber communication is characterized by comprising the following steps:
acquiring a discharge signal generated by a fault point through a first transient overvoltage sensor to obtain a first discharge signal;
acquiring a discharge waveform of a first discharge signal through a first field acquisition unit, and sending a pulse signal of the discharge waveform to a router;
the router receives the pulse signals, the router collects the pulse signals and sends the pulse signals to the industrial personal computer, the industrial personal computer generates a timestamp, and the timestamp is defined as 0 moment;
generating a time stamp and waiting for a pulse signal of a second field acquisition unit;
the second transient overvoltage sensor acquires a discharge signal generated by a fault point to obtain a second discharge signal;
acquiring a discharge waveform of a second discharge signal through a second field acquisition unit, and sending a pulse forming signal of the discharge waveform to the router;
the router receives the pulse signals of the second field acquisition unit, and gathers the pulse signals and sends the pulse signals to the industrial personal computer;
and the industrial personal computer calculates the time difference of the two pulse signals to obtain the GIL fault position.
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| CN113325224A (en) * | 2021-06-24 | 2021-08-31 | 云南电网有限责任公司电力科学研究院 | GIS steep wave measurement system based on optical fiber pulse |
| CN113433435A (en) * | 2021-06-24 | 2021-09-24 | 云南电网有限责任公司电力科学研究院 | Steep wave measurement trigger device based on electric signal |
| CN114062835A (en) * | 2021-10-11 | 2022-02-18 | 国网电力科学研究院武汉南瑞有限责任公司 | Laser-powered GIL breakdown fault positioning system and method |
| CN115166413A (en) * | 2022-06-27 | 2022-10-11 | 上海格鲁布科技有限公司 | Double-end compensation positioning method, device and system for GIL partial discharge source |
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| CN115166413A (en) * | 2022-06-27 | 2022-10-11 | 上海格鲁布科技有限公司 | Double-end compensation positioning method, device and system for GIL partial discharge source |
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Application publication date: 20200821 |