CN113433435A - Steep wave measurement trigger device based on electric signal - Google Patents
Steep wave measurement trigger device based on electric signal Download PDFInfo
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- CN113433435A CN113433435A CN202110703447.5A CN202110703447A CN113433435A CN 113433435 A CN113433435 A CN 113433435A CN 202110703447 A CN202110703447 A CN 202110703447A CN 113433435 A CN113433435 A CN 113433435A
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1254—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of gas-insulated power appliances or vacuum gaps
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/04—Voltage dividers
- G01R15/06—Voltage dividers having reactive components, e.g. capacitive transformer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/16—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using capacitive devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
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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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The application discloses a steep wave measurement trigger device based on signal of telecommunication relates to super, special high voltage power transmission and transformation equipment state monitoring technical field. The device is when carrying out the steep wave and measuring, and the steep wave travelling wave is propagated on the GIS guide arm, and the GIS office that first GIS reserved hand hole department set up puts the sensor and receives the travelling wave signal of telecommunication, and the signal of telecommunication passes through cable transport to the signal of telecommunication trigger, and the signal of power frequency (50Hz) can be filtered, and the filtering rate is greater than 90%, and the high frequency signal part will be remain, and unaffected arrival signal acquisition equipment records the waveform data simultaneously. This application triggers signal acquisition equipment through gathering the signal of telecommunication through setting up GIS partial discharge sensor, signal of telecommunication trigger and signal acquisition equipment, can solve and adopt the optic fibre trigger system based on electromagnetic signal among the prior art, triggers the technical problem that the precision is low.
Description
Technical Field
The application relates to the technical field of super-high voltage power transmission and transformation equipment state monitoring, in particular to a steep wave measurement trigger device based on an electric signal.
Background
GIS (gas insulated switchgear) has the advantages of small floor area, no influence of atmospheric environment, high operation reliability, small maintenance amount and the like, and is widely applied to power systems. Isolation switch operation in a GIS creates VFTO (very fast transient over-voltage) with very high amplitude, very steep, and very high frequency. VFTO not only causes ground fault of GIS main loop, but also insulation damage of adjacent equipment. The higher the voltage level of the power equipment, the lower its insulation margin and the greater the possibility of VFTO causing damage. Therefore, steep wave measurement is required to accurately record the condition of VFTO during the operation of the disconnecting switch (i.e., the opening and closing operation of the knife).
In the current steep wave measurement, most of trigger devices adopt an optical fiber trigger system based on electromagnetic signals, and signal acquisition equipment is triggered by acquiring the electromagnetic signals of a GIS guide rod or a metal closed part. However, the amplitude of the radiated electromagnetic signal is low, and the radiated electromagnetic signal is difficult to be collected by the trigger device.
Disclosure of Invention
The application discloses trigger device is measured to steep wave based on signal of telecommunication to in solving present steep wave and measuring, trigger device mostly adopts the optic fibre trigger system based on electromagnetic signal, triggers signal acquisition equipment through gathering GIS guide arm or not having the electromagnetic signal of metal enclosed part, but radiation electromagnetic signal amplitude is lower like this, is hardly by the technical problem that trigger device gathered.
The application discloses steep wave measurement trigger device based on signal of telecommunication includes: the device comprises a GIS partial discharge sensor, a GIS VFTO sensor, an electric signal trigger, signal acquisition equipment and a power supply;
a GIS shell is arranged outside the GIS guide rod, and a first GIS reserved hand hole and a second GIS reserved hand hole are formed in the GIS shell;
the GIS partial discharge sensor is arranged at the position of the first GIS reserved hand hole, the GIS partial discharge sensor is connected with the electric signal trigger through a cable, and a first isolation box is arranged outside the electric signal trigger; GIS VFTO sensor sets up hand hole department is reserved to the second GIS, GIS VFTO sensor passes through the cable junction signal acquisition equipment, signal acquisition equipment is respectively through the cable junction signal of telecommunication trigger with the power, signal acquisition equipment and power outside are provided with the second shielded cell.
Optionally, the signal acquisition devices are provided with three sets, and the electrical signal triggers are respectively connected with the signal acquisition devices through three-way interfaces.
Optionally, a low-voltage arm resistance-capacitance box and a resistance-capacitance voltage division box are arranged between the GIS VFTO sensor and the signal acquisition device, and the low-voltage arm resistance-capacitance box and the resistance-capacitance voltage division box are used for weakening the influence of stray capacitance to the ground on steep wave measurement.
Optionally, the signal acquisition device includes a waveform recording device and a pulse signal output device.
Optionally, the power supply is a UPS power supply.
Optionally, the cable is a coaxial cable, and the cable is used for transmitting an electrical signal.
Optionally, a basin-type insulator is arranged inside the GIS housing, and the basin-type insulator is used for supporting the GIS guide rod and the GIS housing.
Optionally, the electrical signal trigger is used for acquiring a signal, performing filtering processing, and triggering signal output.
The application discloses a steep wave measurement trigger device based on signal of telecommunication relates to super, special high voltage power transmission and transformation equipment state monitoring technical field. The device is when carrying out the steep wave and measuring, and the steep wave travelling wave is propagated on the GIS guide arm, and the GIS office that first GIS reserved hand hole department set up puts the sensor and receives the travelling wave signal of telecommunication, and the signal of telecommunication passes through cable transport to the signal of telecommunication trigger, and the signal of power frequency (50Hz) can be filtered, and the filtering rate is greater than 90%, and the high frequency signal part will be remain, and unaffected arrival signal acquisition equipment records the waveform data simultaneously. This application triggers signal acquisition equipment through gathering the signal of telecommunication through setting up GIS partial discharge sensor, signal of telecommunication trigger and signal acquisition equipment, can solve and adopt the optic fibre trigger system based on electromagnetic signal among the prior art, triggers the technical problem that the precision is low.
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 creative efforts.
Fig. 1 is a schematic structural diagram of a steep wave measurement triggering device based on an electrical signal according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a circuit board of a steep wave measurement triggering device based on an electrical signal according to an embodiment of the present disclosure;
illustration of the drawings:
wherein, 1-GIS partial discharge sensor; 2-GIS VFTO sensor; 3-an electrical signal trigger; 4-a signal acquisition device; 5-a power supply; 6-GIS guide rod; 7-GIS shell; 71-first GIS reserved hand hole; 72-second GIS reserved hand hole; 8-a first isolation box; 9-a second isolation box; 10-low voltage arm capacitance resistance box; 11-resistance-capacitance voltage dividing box; 12-a first BNC; 13-first BNC copper core hole; 14-a first BNC ground via; 15-a first BCN; 16-a second BNC copper core hole; 17-a second BNC ground via; 18-a first pad; 19-a second pad; and 20-fixing holes of the circuit PCB.
Detailed Description
Reference will now be made in detail to embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following examples do not represent all embodiments consistent with the present application. But merely as exemplifications of systems and methods consistent with certain aspects of the application, as recited in the claims.
In order to solve the technical problems that in the prior art, most of the conventional steep wave measurement triggering devices adopt an optical fiber triggering system based on electromagnetic signals, and trigger the signal acquisition equipment 4 by acquiring the electromagnetic signals of the GIS guide rod 6 or the metal closed part, but the amplitude of the radiated electromagnetic signals is low and the signals are difficult to be acquired by the triggering device, the application discloses a steep wave measurement triggering device based on electric signals through the following embodiments.
Referring to fig. 1, a schematic structural diagram of an electrical signal-based steep wave measurement trigger device disclosed in an embodiment of the present application, the electrical signal-based steep wave measurement trigger device includes: GIS partial discharge sensor 1, GIS VFTO sensor 2, signal trigger 3, signal acquisition equipment 4 and power 5.
Further, the electric signal trigger 3 is used for signal acquisition, filtering processing and signal output triggering.
The GIS guide rod 6 is externally provided with a GIS shell 7, and the GIS shell 7 is provided with a first GIS reserved hand hole 71 and a second GIS reserved hand hole 72.
Sensor 1 is put in GIS office is in first GIS reserves hand hole 71 department, sensor 1 is put in GIS office passes through cable junction signal of telecommunication trigger 3, signal of telecommunication trigger 3 outside is provided with first shielded cell 8.
The application discloses a steep wave measurement trigger device based on signal of telecommunication relates to super, special high voltage power transmission and transformation equipment state monitoring technical field. The device is when carrying out the steep wave and measuring, and the steep wave travelling wave is propagated on the GIS guide arm, and the GIS office that first GIS reserved hand hole department set up puts the sensor and receives the travelling wave signal of telecommunication, and the signal of telecommunication passes through cable transport to the signal of telecommunication trigger, and the signal of power frequency (50Hz) can be filtered, and the filtering rate is greater than 90%, and the high frequency signal part will be remain, and unaffected arrival signal acquisition equipment records the waveform data simultaneously. This application triggers signal acquisition equipment through gathering the signal of telecommunication through setting up GIS partial discharge sensor, signal of telecommunication trigger and signal acquisition equipment, can solve and adopt the optic fibre trigger system based on electromagnetic signal among the prior art, triggers the technical problem that the precision is low.
In some embodiments of the present application, three signal acquisition devices 4 are provided, and the electrical signal trigger 3 is connected to the signal acquisition devices 4 through three-way interfaces.
Specifically, the steep wave measurement triggering device based on the electrical signal needs to be connected to three signal acquisition devices 4 through three-way interfaces, and each signal acquisition device 4 sets the same triggering threshold to record the steep wave signal. The signal acquisition equipment 4 can be used for signal acquisition, filtering processing and trigger signal output, and can be branched to reach the signal acquisition equipment 4 through a tee joint for waveform recording.
In some embodiments of the present application, the steep wave measurement trigger device based on the electrical signal includes a three-phase pipeline inside, each phase needs to be set according to fig. 1, and by analyzing three-phase waveform data, a steep wave traveling wave transfer function and a transfer mode can be analyzed to perform fault analysis and location.
In some embodiments of the present application, a low-voltage arm resistance-capacitance box 10 and a resistance-capacitance voltage-dividing box 11 are disposed between the GIS VFTO sensor 2 and the signal acquisition device 4, and the low-voltage arm resistance-capacitance box 10 and the resistance-capacitance voltage-dividing box 11 are used for reducing the influence of stray capacitance to the ground on the measurement of the steep waves, so that the result obtained by the device is more accurate.
In some embodiments of the present application, the signal acquisition device 4 comprises a waveform recording device and a pulse signal output device. Specifically, the signal acquisition device 4 includes a waveform recording device, a pulse signal output device, and a power supply, and the field acquisition unit is generally an oscilloscope or an acquisition card.
In some embodiments of the present application, the power supply 5 is a UPS power supply.
Among them, an ups (uninterruptible Power supply) Power supply is an uninterruptible Power supply including an energy storage device. The power supply device is mainly used for providing uninterrupted power supply for partial equipment with higher requirements on power supply stability. When the commercial power input is normal, the UPS supplies the commercial power to the load for use after stabilizing the voltage, and the UPS is an alternating current type voltage stabilizer and also charges the battery in the machine; when the commercial power is interrupted (power failure in accident), the UPS immediately supplies the direct current electric energy of the battery to the load by a method of switching and converting the inverter to continuously supply 220V alternating current to the load, so that the load keeps normal work and the software and hardware of the load are protected from being damaged. UPS power supplies typically provide protection against either excessive voltage or insufficient voltage.
In some embodiments of the present application, the cable is a coaxial cable, and the cable is used to transmit electrical signals.
The coaxial cable is a cable having two concentric conductors, wherein the conductor and the shielding layer share the same axis. Most common coaxial cables consist of a copper conductor separated by an insulating material, outside of which is another layer of annular conductor and its insulation, and then the entire cable is surrounded by a sheath of polyvinyl chloride or teflon material. Coaxial cables can support high bandwidth communications over relatively long, unrepeatered lines.
In some embodiments of the present application, a basin insulator is disposed inside the GIS housing 7, and the basin insulator is used for supporting the GIS guide rod 6 and the GIS housing 7.
The basin-type insulator is generally formed by gluing or mechanically clamping an insulating part (such as a porcelain) and a metal accessory (such as a steel pin, an iron cap, a flange and the like) by using an adhesive. Insulators are widely used in power systems, generally belong to external insulation, and operate under atmospheric conditions. The buses of overhead transmission lines, power plants and substations and the external live conductors of various electrical equipment are supported by insulators and insulated from the earth (or ground) or other conductors having potential differences.
The GIS partial discharge sensor 1 and the electric signal trigger 3 are utilized to trigger the signal acquisition equipment 4. Aiming at the GIS VFTO sensor 2 arranged at the position of the second GIS reserved hand hole 72, the high-voltage arm capacitor of the GIS VFTO sensor is a coupling capacitor between the GIS guide rod 6 and the built-in probe, and the low-voltage arm capacitor is an external patch capacitor in the low-voltage arm capacitor box 10. The lead-out signal is taken from the induction electrode and transmitted to the signal acquisition equipment 4 through the low-voltage arm resistance-capacitance box 10, the matching resistor, the coaxial cable and the secondary voltage division system (resistance-capacitance voltage division box 11).
The signal acquisition equipment 4 records steep wave signals generated by the on-off operation of the switch blade in time, and the low-frequency cutoff frequency of the device is ten times of the power frequency, so that the power frequency signals can be effectively filtered, and only VFTO signals are measured. When the switch blade is operated to generate a steep wave signal on the basis of the power frequency signal and the steep wave signal passes through the device, the power frequency signal can be filtered, the steep wave signal can completely pass through the device, and the signal is transmitted to the oscilloscope channel through the cable. The trigger value of the oscilloscope is larger than the voltage value of the power frequency signal passing through the device, and once the knife switch is operated to generate the steep wave signal, the oscilloscope can automatically record the steep wave signal. The method can effectively shield on-site power frequency 50Hz signals and space electromagnetic radiation interference; transient overvoltage signals can be effectively captured, trigger signals are generated, and the condition that the signal acquisition equipment 4 refuses to trigger is avoided. The device can improve the accuracy of recording steep wave signals by the oscilloscope, and effectively improves the effectiveness of transient overvoltage on-line monitoring.
Fig. 2 is a schematic structural diagram of a circuit board adopted in the steep wave measurement triggering device based on an electrical signal according to the embodiment of the present invention, as shown in fig. 2, a first BNC connector is soldered to a first BNC12, a first BNC connector copper core is soldered to a first BNC copper core hole 13, and a first BNC connector is soldered to a first BNC ground hole 14 in a grounded manner; a second BNC connector is welded on the first BCN15, a second BNC copper core is welded on the second BNC copper core hole 16, and a second BNC grounding pin is welded on the second BNC grounding hole 17; the 30nF capacitor and the 10k Ω resistor are soldered in parallel between a first pad 18 and a second pad 19, said first pad 18 and second pad 19, wherein the second pad 19 is grounded. The circuit PCB board fixing hole 20 plays a fixing role.
After the circuit board is welded according to the technical scheme, a pulse signal is input at the head end of the cable, the pulse signal is a composite signal with the frequency of 50Hz and the high-frequency signal, and after the composite signal is filtered by a circuit, a power frequency (50Hz) signal can be filtered, wherein the filtering rate is more than 90%; the high-frequency signal part is reserved and reaches the signal acquisition equipment 4 for steep wave measurement at different measuring points through three-way shunting, so that at least 4 signal acquisition equipment 4 can be synchronously triggered to record waveform data.
The present application has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to limit the application. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the presently disclosed embodiments and implementations thereof without departing from the spirit and scope of the present disclosure, and these fall within the scope of the present disclosure. The protection scope of this application is subject to the appended claims.
Claims (8)
1. An electrical signal-based steep wave measurement triggering device, comprising: the device comprises a GIS partial discharge sensor (1), a GIS VFTO sensor (2), an electric signal trigger (3), signal acquisition equipment (4) and a power supply (5);
a GIS shell (7) is arranged outside the GIS guide rod (6), and a first GIS reserved hand hole (71) and a second GIS reserved hand hole (72) are arranged on the GIS shell (7);
the GIS partial discharge sensor (1) is arranged at the position of the first GIS reserved hand hole (71), the GIS partial discharge sensor (1) is connected with the electric signal trigger (3) through a cable, and a first isolation box (8) is arranged outside the electric signal trigger (3); GIS VFTO sensor (2) sets up second GIS reserves hand hole (72) department, GIS VFTO sensor (2) pass through cable junction signal acquisition equipment (4), signal acquisition equipment (4) are respectively through cable junction signal of telecommunication trigger (3) with power (5), signal acquisition equipment (4) and power (5) outside are provided with second shielded cell (9).
2. The steep wave measurement triggering device based on the electrical signal according to claim 1, wherein the signal collecting equipment (4) is provided with three sets, and the electrical signal triggers (3) are respectively connected with the signal collecting equipment (4) through a tee interface.
3. The steep wave measurement triggering device based on electric signals according to claim 1, characterized in that a low-voltage arm resistance-capacitance box (10) and a resistance-capacitance voltage dividing box (11) are arranged between the GIS VFTO sensor (2) and the signal acquisition equipment (4), and the low-voltage arm resistance-capacitance box (10) and the resistance-capacitance voltage dividing box (11) are used for weakening the influence of stray capacitance to ground on the measurement of the steep wave.
4. The steep wave measurement triggering device based on electrical signals as claimed in claim 1, characterized in that the signal acquisition equipment (4) comprises a waveform recording device and a pulse signal output device.
5. The electrical signal-based steep wave measurement triggering device according to claim 1, characterized in that said power source (5) is a UPS power source.
6. The electrical signal-based sharp wave measurement triggering device according to claim 1, wherein the cable is a coaxial cable, the cable being used to transmit electrical signals.
7. The electrical signal-based steep wave measurement triggering device according to claim 1, characterized in that a basin insulator is arranged inside the GIS housing (7), said basin insulator being used to support the GIS guide bar (6) and the GIS housing (7).
8. The steep wave measurement triggering device based on an electrical signal as claimed in claim 1, characterized in that the electrical signal trigger (3) is used for signal acquisition, filtering processing and triggering signal output.
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| CN202110703447.5A CN113433435A (en) | 2021-06-24 | 2021-06-24 | Steep wave measurement trigger device based on electric signal |
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| CN202110703447.5A CN113433435A (en) | 2021-06-24 | 2021-06-24 | Steep wave measurement trigger device based on electric signal |
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Cited By (1)
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| CN114047374A (en) * | 2022-01-11 | 2022-02-15 | 华北电力大学 | GIS (geographic information system) hand window type VFTO (very fast transient overvoltage) sensing and triggering integrated measuring device |
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| CN114047374A (en) * | 2022-01-11 | 2022-02-15 | 华北电力大学 | GIS (geographic information system) hand window type VFTO (very fast transient overvoltage) sensing and triggering integrated measuring device |
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Application publication date: 20210924 |