CN213750297U - Intermittent earth fault simulation device - Google Patents
Intermittent earth fault simulation device Download PDFInfo
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- CN213750297U CN213750297U CN202022031914.8U CN202022031914U CN213750297U CN 213750297 U CN213750297 U CN 213750297U CN 202022031914 U CN202022031914 U CN 202022031914U CN 213750297 U CN213750297 U CN 213750297U
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- discharger
- electrode plate
- fault simulation
- simulation device
- ground fault
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- 238000004088 simulation Methods 0.000 title claims description 15
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims abstract description 9
- 239000007787 solid Substances 0.000 claims abstract description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 claims description 8
- 230000005684 electric field Effects 0.000 description 8
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- 239000004576 sand Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005034 decoration Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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Abstract
The utility model discloses an intermittent earth fault simulator, which comprises a power supply, a discharger, a plate electrode and a sprayer; the power supply is respectively connected with the discharger and the electrode plate, and the power supply is grounded; the discharger is arranged opposite to the electrode plate; the ejector is filled with liquid or solid particles, and the jet orifice of the ejector faces to a position between the discharger and the electrode plate. The utility model discloses can conveniently simulate distribution network intermittent type nature trouble, the device is simple and easy operation.
Description
Technical Field
The utility model relates to a distribution network fault simulation technical field especially relates to an intermittent type nature ground fault analogue means.
Background
The power distribution network is an energy transmission network related to the national civilization, intermittent grounding faults such as tree touching, indirect grounding and the like frequently occur in the running process of the power distribution network, and the power distribution network is typically characterized in that a fault electric arc is re-ignited or extinguished along with the change of an external environment. When the dielectric strength of the fault point exceeds the electric field, the arc tends to extinguish; when the dielectric strength of the fault point is lower than the electric field, the arc reignites.
Various testing devices have been developed in the industry to detect and isolate intermittent earth faults. The accuracy and reliability of the testing device need to rely on simulating the actual intermittent fault scene to carry out fault actual measurement. However, intermittent faults have the characteristic of sporadic occurrence, are difficult to simulate and reproduce in real situations, and bring great difficulty to equipment performance detection.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an intermittent type nature ground fault analogue means can conveniently simulate distribution network intermittent type nature trouble, and the device is simple and easy operation.
In order to achieve the above object, an embodiment of the present invention provides an intermittent ground fault simulator, including a power source, a discharger, an electrode plate, and a sprayer; the power supply is respectively connected with the discharger and the electrode plate, and the power supply is grounded; the discharger is arranged opposite to the electrode plate; the ejector is filled with liquid or solid particles, and the jet orifice of the ejector faces to a position between the discharger and the electrode plate.
Preferably, the ejector comprises a storage tank and a booster pump; wherein the storage tank is connected with the pressurizing pump through a conduit.
Preferably, the storage tank is fixed above the space between the discharger and the electrode plate, and the storage tank is provided with a downward jet.
Preferably, the power source is a single phase voltage of a power distribution network.
Preferably, the discharger is a discharge rod, and the discharge rod is made of copper or tungsten copper.
Preferably, the electrode plate is made of copper or tungsten copper.
Compared with the prior art, the embodiment of the utility model provides an intermittent type nature ground fault analogue means that provides can conveniently simulate distribution network intermittent type nature trouble, and the device is simple and easy operation.
Drawings
Fig. 1 is a schematic structural diagram of an intermittent ground fault simulation apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1, a schematic structural diagram of an intermittent ground fault simulation device provided in this embodiment of the present invention is shown, respectively, where the intermittent ground fault simulation device includes a power source 1, a discharger 2, an electrode plate 3 and an injector; the power supply 1 is respectively connected with the discharger 2 and the electrode plate 3, and the power supply 1 is grounded; the discharger 2 is arranged opposite to the electrode plate 3; the ejector is filled with liquid or solid particles, and the ejection port of the ejector faces a position between the discharger 2 and the electrode plate 3.
Specifically, the intermittent ground fault simulation device comprises a power supply 1, a discharger 2, an electrode plate 3 and an injector; wherein, the power supply 1 is respectively connected with the discharger 2 and the electrode plate 3, and the power supply 1 is grounded. Namely, one end of the power source 1 is connected to the discharger 2, and the other end is connected to the electrode plate 3. The discharger 2 is arranged opposite to the electrode plate 3, and the discharging part of the discharger 2 is opposite to the electrode plate 3, so that an approximately uniform electric field is formed between the two. The ejector is filled with liquid or solid particles, and the ejection port of the ejector faces a position between the discharger 2 and the electrode plate 3. That is, the jet port of the injector faces the electric field formed by the discharger 2 and the electrode plate 3. This is to spray liquid or solid particles which disturb the electric field between the arrester 2 and the electrode plate 3, reduce the insulation strength between the arrester 2 and the electrode plate 3, form a through discharge channel, and make the arc extinguish or restrike continuously, thereby simulating intermittent discharge. Preferably, the liquid is water or an electrolyte and the solid particles are sand.
The utility model discloses this embodiment provides an intermittent type nature ground fault analogue means can conveniently simulate distribution network intermittent type nature trouble, and the device is simple and easy operation.
As a modification of the above, the ejector includes a storage tank 4 and a pressurizing pump 5; wherein the storage tank 4 is connected to the pressurizing pump 5 through a conduit.
Specifically, the ejector includes a tank 4 and a pressurizing pump 5; wherein, the storage tank 4 is connected with the pressure pump 5 through a conduit. Generally, the conduit is made of an insulating material and is used for communicating the upper cavity of the storage tank 4 with the pressure pump 5, so that the medium inside the storage tank 4 can be pressurized by the pressure pump 5 to form a squeezing force, and the liquid or solid particles in the storage tank 4 can be ejected.
Preferably, the booster pump 5 is a compression pump, and the injection rate of the storage tank 4 can be controlled by controlling the compression frequency or the compression pressure of the compression pump, so as to control the probability of reignition/extinction of the arc, and further control the form of the intermittent arc.
As an improvement of the above scheme, the storage tank 4 is fixed above the space between the discharger 2 and the electrode plate 3, and the storage tank 4 is provided with a downward jet.
Specifically, the storage tank 4 is fixed above the space between the discharger 2 and the electrode plate 3, and the storage tank 4 is opened with a jet port facing downward. That is, the tank 4 is installed above a position where an electric field is formed between the discharger 2 and the electrode plate 3, and a jet port is opened downward in order to spray liquid or solid particles that disturb the electric field in the direction of the electric field.
As a modification of the above solution, the power source 1 is a single-phase voltage of a power distribution network.
Specifically, the power source 1 is a single-phase voltage of a distribution network. Generally, the power supply 1 is led out through a lead-out head of single-phase voltage of the power distribution network and is respectively connected to the discharger 2 and the electrode plate 3 for simulating the voltage of the power supply 1 when the single-phase ground fault occurs in the power distribution network. Preferably, the single-phase voltage of the distribution network is 10-35 kV.
As an improvement of the above scheme, the discharger 2 is a discharge rod made of copper or tungsten copper.
Specifically, the discharger 2 is a discharge rod made of copper or tungsten copper. The discharger 2 may also be a discharge electrode. The discharger 2 functions as a pole for forming a discharge. The discharge rods and the electrode plates 3 act together to form a rod-plate near-uniform field to simulate two poles of a power distribution network when a single-phase earth fault occurs.
As an improvement of the above scheme, the electrode plate 3 is made of copper or tungsten copper.
Specifically, the electrode plate 3 is made of copper or tungsten copper. Other conductive metal materials can be selected for the electrode plate 3.
In order to deepen the understanding of the present invention, another embodiment of the present invention further describes a method for using the intermittent ground fault simulation apparatus. After the device is assembled, the distance between the discharge rod and the electrode plate 3 is adjusted, and sufficient safety margin between the electrodes is ensured during normal operation. And (3) compressing the air compressing pump to ensure that water or sand leaks out of the storage tank 4, and recording K1 as initial discharge pressure when the air pressure of the air compressing pump reaches a certain value K1 and discharge occurs between the rods and the plates. The discharge frequency and the discharge angle of the rod plate gap can be controlled by gradually increasing the pressure value of the compression pump. The rod-plate discharge is characterized by intermittency due to the randomness of the pumping of sand or water. As the sand/water fall, the arc receptor spacing is pulled up and the arc exhibits a characteristic of being extinguished/restrike. The characteristics can perfectly reproduce intermittent earth faults and can be used for testing the performance of the earth fault detection device.
To sum up, the embodiment of the present invention provides an intermittent ground fault simulation apparatus, which includes a power source, a discharger, a plate electrode and an injector. The device can quickly and conveniently simulate the intermittent single-phase earth fault of the power distribution network, and is simple, safe and easy to operate.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.
Claims (6)
1. An intermittent ground fault simulation device is characterized by comprising a power supply, a discharger, an electrode plate and a sprayer; the power supply is respectively connected with the discharger and the electrode plate, and the power supply is grounded; the discharger is arranged opposite to the electrode plate; the ejector is filled with liquid or solid particles, and the jet orifice of the ejector faces to a position between the discharger and the electrode plate.
2. The intermittent ground fault simulation device of claim 1, wherein the injector comprises a storage tank and a booster pump; wherein the storage tank is connected with the pressurizing pump through a conduit.
3. The intermittent ground fault simulation device of claim 2, wherein the tank is fixed above between the arrester and the electrode plate, and the tank is downwardly perforated with jets.
4. The intermittent ground fault simulation device of claim 1, wherein the power source is a single phase voltage of a power distribution grid.
5. The intermittent ground fault simulation device of claim 1, wherein the arrester is a discharge rod made of copper or tungsten copper.
6. The intermittent ground fault simulation device of claim 1, wherein the electrode plates are made of copper or tungsten copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022031914.8U CN213750297U (en) | 2020-09-16 | 2020-09-16 | Intermittent earth fault simulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022031914.8U CN213750297U (en) | 2020-09-16 | 2020-09-16 | Intermittent earth fault simulation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213750297U true CN213750297U (en) | 2021-07-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022031914.8U Active CN213750297U (en) | 2020-09-16 | 2020-09-16 | Intermittent earth fault simulation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213750297U (en) |
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2020
- 2020-09-16 CN CN202022031914.8U patent/CN213750297U/en active Active
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