CN110927528A - Transmission line fault simulation test device - Google Patents
Transmission line fault simulation test device Download PDFInfo
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- CN110927528A CN110927528A CN201911276710.6A CN201911276710A CN110927528A CN 110927528 A CN110927528 A CN 110927528A CN 201911276710 A CN201911276710 A CN 201911276710A CN 110927528 A CN110927528 A CN 110927528A
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- transmission line
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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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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a power transmission line fault simulation test device, relates to the technical field of power transmission network fault monitoring, and solves the problem that various short circuit grounding fault types of a power transmission line are mainly analyzed and judged by manual experience, and the on-line monitoring and diagnosis of the power transmission line fault cannot be realized. The device comprises a standard voltage divider, an oscilloscope, a high voltage generating device, a simulation lead, a monitoring terminal, a simulation ground resistor and a data center for receiving data of the monitoring terminal; the high-voltage generating device, the monitoring terminal and the analog grounding resistor are all electrically connected on the analog conducting wire, the output end of the high-voltage generating device is respectively and electrically connected with the input end of the standard voltage divider and the input end of the monitoring terminal, the oscilloscope is electrically connected with the standard voltage divider, the monitoring terminal is connected on the analog conducting wire in series, and the input end of the analog grounding resistor is electrically connected with the output end of the monitoring terminal; the analog grounding resistor comprises a slide rheostat and a capacitor connected in parallel. The device can be used for carrying out corresponding test fault simulation analysis on the power grid.
Description
Technical Field
The invention relates to the technical field of power transmission network fault monitoring, in particular to a power transmission line fault simulation test device.
Background
The transmission line fault monitoring on-line positioning fault point covers the transmission line of each voltage grade of the power grid, compared with the traditional monitoring mode in the transformer substation, the fault positioning accuracy is greatly improved, and the maintenance efficiency of the transmission line of the power grid is greatly improved.
However, for various types of transmission fault reasons of the transmission line, at present, the analysis and the judgment mainly depend on manual experience, and the online monitoring and the diagnosis of the transmission line fault cannot be realized. In view of different types of faults of the power transmission line, the contact resistances of the short-circuit points are different in size, and accurate fault cause diagnosis of the waveform acquired when the fault occurs is greatly influenced. In a word, each type of short-circuit ground fault of the current power transmission line does not have corresponding characteristics and rules, so that the fault type of the power transmission line cannot be judged quickly and accurately by an online monitoring mode.
Disclosure of Invention
Aiming at the defects, the invention provides a power transmission line fault simulation test device, which solves the problem that various short-circuit grounding fault types of a power transmission line are mainly analyzed and judged by manual experience and cannot realize on-line monitoring and diagnosis of power transmission line faults.
In order to achieve the purpose, the invention adopts the following technical scheme:
a power transmission line fault simulation test device comprises a standard voltage divider, an oscilloscope, a high voltage generating device, a simulation lead, a monitoring terminal, a simulation ground resistance and a data center for receiving data of the monitoring terminal; the high-voltage generating device, the monitoring terminal and the analog grounding resistor are all electrically connected on an analog conducting wire, the output end of the high-voltage generating device is respectively and electrically connected with the input end of a standard voltage divider and the input end of the monitoring terminal, the oscilloscope is electrically connected with the standard voltage divider, the monitoring terminal is connected on the analog conducting wire in series, the input end of the analog grounding resistor is electrically connected with the output end of the monitoring terminal, and the other end of the analog grounding resistor is grounded; the analog grounding resistor comprises a sliding rheostat and a capacitor connected with the sliding rheostat in parallel.
The device further comprises a discharge gap, the discharge gap comprises two conducting wires, the input end and the output end of the analog ground resistor are respectively and electrically connected with one ends of the two conducting wires, the other ends of the two conducting wires are not connected to form a gap, and the breakdown voltage of the discharge gap is smaller than the withstand voltage value of a test device in the analog ground resistor.
Furthermore, two ends of the analog lead are connected with insulating wires, and the insulating wires are hung and suspend the analog lead horizontally.
Furthermore, one ends of the two insulating wires are connected with each other and form a triangular structure with the simulation lead, the connected ends of the two insulating wires are hung on a lifting hook of a crane, and the crane horizontally suspends the simulation lead.
Further, the monitoring terminal collects fault transient waveforms during simulation tests.
Further, the high voltage generating device generates a high voltage input waveform.
Further, the oscilloscope collects an overvoltage waveform.
Compared with the prior art, the invention has the beneficial effects that:
the power transmission line fault simulation test device provided by the invention is convenient for testers to carry out test fault simulation analysis, and in a test loop, the reason characteristics of a fault point are analyzed by collecting the traveling wave, power frequency component and waveform characteristic information generated when the power transmission line has a short-circuit fault; according to the difference that the impedance time-varying characteristics of the flashover channel are reflected in the fault transient traveling wave under the condition of different fault cause types, the influence rule of different channel characteristics on power frequency and high-frequency signals before and after fault flashover is obtained, so that open self-learning of an accident sample is realized, the identification capability of accidents such as bird damage, pollution flashover, tree obstacles, forest fires and the like is improved, the quick and accurate judgment of the fault cause of the power transmission line is realized, the fault cause diagnosis efficiency of the power transmission line is improved, and a circuit without related power transmission line fault simulation tests in China is filled.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
the labels shown in the figures are: 1-standard voltage divider, 2-oscilloscope, 3-high voltage generator, 4-analog wire, 5-insulated wire, 6-monitoring terminal, 7-data center, 8-analog ground resistance, 9-discharge gap, 10-sliding rheostat and 11-capacitor.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
The invention discloses a power transmission line fault simulation test device, which comprises a standard voltage divider 1, an oscilloscope 2, a high voltage generating device 3, a simulation lead 4, a monitoring terminal 6, a simulation ground resistor 8 and a data center 7 for receiving data of the monitoring terminal 6, wherein the monitoring terminal 6 is connected in series on the simulation lead 4, the monitoring terminal 6 acquires fault transient waveform data during simulation test, and the high voltage generating device 3 generates a high voltage input waveform. The high voltage generating device 3, the monitoring terminal 6 and the analog grounding resistor 8 are all electrically connected on the analog lead 4, the output end of the high voltage generating device 3 is respectively and electrically connected with the input end of the standard voltage divider 1 and the input end of the monitoring terminal 6, the oscilloscope 2 is electrically connected with the standard voltage divider 1, the input end of the analog grounding resistor 8 is electrically connected with the output end of the monitoring terminal 6, and the other end of the analog grounding resistor is grounded; the analog ground resistor 8 includes a sliding varistor 10 and a capacitor 11 connected in parallel with the sliding varistor 10. The discharge gap 9 is connected with the analog grounding resistor 8 in parallel, the discharge gap 9 comprises two conducting wires, the input end and the output end of the analog grounding resistor 8 are respectively and electrically connected with one end of the two conducting wires, the other ends of the two conducting wires are not connected to form a gap, and the breakdown voltage of the discharge gap 9 is smaller than the withstand voltage value of a test device in the analog grounding resistor 8, so that the effect of protecting an analog circuit is achieved. The two ends of the simulation lead 4 are connected with the insulated wires 5, one ends of the two insulated wires 5 are connected with each other and form a triangular structure with the simulation lead 4, the end of the two insulated wires 5 connected with each other is hung on a lifting hook of a crane 12, and the crane 12 horizontally suspends the simulation lead 4 to keep a sufficient safety distance with the ground.
When the short-circuit grounding fault occurs to the power transmission line, the power transmission line fault simulation test device can simulate and acquire corresponding data to quickly and accurately diagnose the fault reason. The high voltage generating device 3 generates a high voltage input waveform, namely a voltage simulating the normal operation of a power grid transmission line, and the waveform of the overvoltage is acquired through the oscilloscope 2 connected to the test circuit after being regulated by the standard voltage divider 1. The simulated grounding resistor 8 can simulate the size of the fault point contact resistor when the transmission line has a fault, namely the contact resistance value of the short-circuit point when the simulated transmission line has a short-circuit fault is adjusted through the sliding rheostat 10, the contact piece on the sliding rheostat 10 is slid on the contact surface of the resistance wire, the resistance value is adjusted, and the size of the fault point contact resistor when the transmission line has a fault is simulated; the parallel capacitor 11 simulates the capacitance of the transmission line conductor to ground. The simulation lead 4 penetrates through the center of the monitoring terminal 6 and is used for collecting fault transient waveforms in simulation test. The discharge gap 9 is connected with the analog grounding resistor 8 in parallel to protect the analog circuit, when the test voltage exceeds the withstand voltage value of the test device, the discharge gap 9 is broken down, the test voltage is led into the ground, and the safety of people and equipment is protected.
The power transmission line fault simulation test device provided by the invention realizes the simulation of various short circuit grounding fault types of the power transmission line in a test room, thereby acquiring the waveform characteristics and relevant rules of various fault types for being used as the reasons for judging the actual fault of the power transmission line of a power grid.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. The utility model provides a transmission line trouble analogue test device which characterized in that: the device comprises a standard voltage divider (1), an oscilloscope (2), a high-voltage generating device (3), an analog lead (4), a monitoring terminal (6), an analog ground resistor (8) and a data center (7) for receiving data of the monitoring terminal (6);
the high-voltage generating device (3), the monitoring terminal (6) and the analog grounding resistor (8) are electrically connected on the analog lead (4), the output end of the high-voltage generating device (3) is electrically connected with the input end of the standard voltage divider (1) and the input end of the monitoring terminal (6) respectively, the oscilloscope (2) is electrically connected with the standard voltage divider (1), the monitoring terminal (6) is connected on the analog lead (4) in series, the input end of the analog grounding resistor (8) is electrically connected with the output end of the monitoring terminal (6), and the other end of the analog grounding resistor is grounded;
the analog grounding resistor (8) comprises a sliding rheostat (10) and a capacitor (11) connected with the sliding rheostat (10) in parallel.
2. The transmission line fault simulation test device of claim 1, characterized in that: still include discharge gap (9), discharge gap (9) include two wires, the input and the output of simulation ground resistance (8) respectively with the one end electricity of two wires is connected, the other end of two wires is disconnected and forms the clearance, the breakdown voltage of discharge gap (9) is less than the withstand voltage value of the device of testing in simulation ground resistance (8).
3. The transmission line fault simulation test device of claim 1 or 2, characterized in that: the simulation wire is characterized in that two ends of the simulation wire (4) are connected with insulating wires (5), and the insulating wires (5) are hung and suspend the simulation wire (4) horizontally.
4. The transmission line fault simulation test device of claim 3, characterized in that: one ends of the two insulating wires (5) are connected with each other and form a triangular structure with the simulation lead (4), one ends of the two insulating wires (5) connected with each other are hung on a lifting hook of a crane (12), and the simulation lead (4) is horizontally suspended by the crane (12).
5. The transmission line fault simulation test device of claim 1, characterized in that: and the monitoring terminal (6) collects fault transient waveforms during simulation test.
6. The transmission line fault simulation test device of claim 1, characterized in that: the high voltage generating device (3) generates a high voltage input waveform.
7. The transmission line fault simulation test device of claim 1, characterized in that: the oscilloscope (2) collects overvoltage waveforms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911276710.6A CN110927528A (en) | 2019-12-12 | 2019-12-12 | Transmission line fault simulation test device |
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| CN201911276710.6A CN110927528A (en) | 2019-12-12 | 2019-12-12 | Transmission line fault simulation test device |
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| CN110927528A true CN110927528A (en) | 2020-03-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111736091A (en) * | 2020-05-27 | 2020-10-02 | 湖南省湘电试验研究院有限公司 | Unstable high-resistance ground fault simulation circuit based on RTDS platform and application method thereof |
| CN113592107A (en) * | 2021-07-19 | 2021-11-02 | 广东电网能源发展有限公司 | Bypass simulation method and system of power transmission line, intelligent terminal and storage medium |
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Application publication date: 20200327 |