CN112180209A - Distribution network ground fault selection and section selection device - Google Patents
Distribution network ground fault selection and section selection device Download PDFInfo
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- CN112180209A CN112180209A CN202011012860.9A CN202011012860A CN112180209A CN 112180209 A CN112180209 A CN 112180209A CN 202011012860 A CN202011012860 A CN 202011012860A CN 112180209 A CN112180209 A CN 112180209A
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- fixedly connected
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- distribution network
- ground fault
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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
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Electric Cable Installation (AREA)
Abstract
The invention discloses a distribution network ground fault selection section selection device which comprises a driving rack, wherein the rear side of the driving rack is connected with a driving wheel component, the left side of the driving rack is provided with a roller component, the central part of the driving rack is fixedly connected with an installation disc body, the top of the installation disc body is provided with a shooting detection component, the shooting detection component comprises a driving motor fixedly connected to the top of the installation disc body, the output shaft of the driving motor is vertically arranged upwards, the output shaft of the driving motor is fixedly connected with a top disc body, the top disc body is concentrically provided with a ring body rod, the bottom of the ring body rod is fixedly connected with a plurality of cameras, the distribution network ground fault selection section selection device also comprises a plurality of current detection components symmetrically arranged on the front side and the rear side of the top of the driving rack. By adopting the device component, the fault point can be quickly found, the efficiency of finding the fault point by designing the device component is high, the finding is rapid, and the troubleshooting efficiency is effectively improved.
Description
Technical Field
The invention relates to a distribution network ground fault selection device, in particular to a distribution network ground fault selection section selection device.
Background
With the development of electric power in China, a power distribution grid is widely laid, and during the work of the power distribution grid, ground faults often occur to cause the ground faults, so that the ground faults need to be carefully selected, and fault points need to be quickly searched.
The main causes of the ground fault are as follows:
(1) accidents caused by thunder. The system has larger network coverage and relatively increases the probability of lightning strike. Not only is direct lightning damaged, but also considerable damage can be caused by induced overvoltage formed by lightning and cloud lightning due to the fact that lightning protection facilities are not perfect enough in insulation level and lightning resistance level, so that the safety of a power grid is endangered.
(2) A pollution flashover failure. The fault of circuit multipoint earthing is also caused frequently in the distribution network due to insulator pollution flashover. There are many insulators that are burned by discharge due to surface area contamination. Insulator pollution discharge is the main reason causing the single-phase grounding of the line and causing tripping.
(3) Ferromagnetic resonance overvoltage. The system belongs to a dry neutral point ungrounded system, and the network-to-ground capacitance is larger and larger along with the enlargement of the scale of the system. The nonlinear inductance of electromagnetic voltage transformers and no-load transformers in such networks is relatively large. The inductance-reactance specific volume is much larger, and the neutral point of the primary coil of the electromagnetic voltage transformer is directly grounded and is excited by lightning stroke, single-phase ground, switching operation and the like, so that ferromagnetic resonance can be formed, the overvoltage generated by the resonance is up to 3 times of the line voltage at most, and the insulator flashover and the lightning arrester explosion can be caused. And even electrical equipment.
(4) Arc grounding overvoltage. The distribution network belongs to a neutral point insulation system. The healthy phase voltage will rise to the line voltage when single phase grounding occurs. However, if single-phase intermittent flashover to the ground occurs, trees under the line intermittently discharge to the conducting wire under the action of strong wind, and the arc at the grounding point is intermittently extinguished and reignited. Transient change of the power grid operation state is caused to cause strong oscillation of electromagnetic energy, transient overvoltage is generated in a healthy phase and a fault phase, the maximum overvoltage of the healthy phase is 3.5 times of line voltage, and the maximum overvoltage of the fault phase is 2 times. If insulation weaknesses exist in the network, breakdown, short circuit or electrical equipment is liable to be caused. A serious accident is formed.
(5) An inter-phase short circuit accident caused by single-phase grounding. For a 6-10 kV system, most transformers are in triangular connection, and no neutral point is led out. Arc suppression coils are also not installed. With the development of power grids, particularly the increase of cable lines, the capacitance of the network to the ground is larger and larger, when single-phase instantaneous grounding occurs, electric arcs cannot be extinguished automatically, interphase short circuit is easy to form, and the circuit breaker is tripped.
(6) The quality of the line, and other reasons. The installation quality of the circuit is not high, and the layout is unreasonable. Some lines are not installed and erected according to the standard, insulation is not shake-measured piece by piece and sampling is carried out on alternating current anti-block tests before line insulators with insufficient crossing distance are installed, and the insulation creepage distance is insufficient. ② improper operation and maintenance. The distribution lines are not periodically and alternately overhauled, so that the lines have great defects and the network operates with faults. And thirdly, thin insulating equipment. Some of the devices in the distribution network have low levels of insulation and some installation processes are not satisfactory. Influence of trees in the route channel. The maintenance of the channel is not enhanced, and trees are cut irregularly, so that the grounding or short circuit of the line is often caused.
The distribution grid is large in distribution range, so that the process of finding fault points is complicated.
The prior art does not disclose a ground fault fine-selection device capable of quickly searching for a fault point, so that the fault point can be efficiently searched.
Disclosure of Invention
The invention aims to solve the technical problem of providing a distribution network ground fault selection and section selection device
The invention solves the technical problems through the following technical scheme:
a distribution network ground fault selection and section selection device comprises a driving rack, wherein a driving wheel component is connected to the rear side of the driving rack, and a roller component is assembled on the left side of the driving rack;
the central part of the driving rack is fixedly connected with a mounting disc body, and the top of the mounting disc body is provided with a camera detection component;
the camera shooting detection part comprises a driving motor fixedly connected to the top of the mounting disc body, an output shaft of the driving motor is vertically arranged upwards, an output shaft of the driving motor is fixedly connected with a top disc body, and the top disc body is concentrically provided with an annular rod;
the bottom of the ring body rod is fixedly connected with a plurality of cameras;
the distribution network ground fault selection section selection device also comprises a plurality of current detection parts which are symmetrically arranged at the front side and the rear side of the top of the drive machine frame;
the current detection part comprises a folding rod fixedly connected to the driving rack, an electric telescopic rod is assembled on the folding rod, the electric telescopic rod is connected to the folding rod in a sliding mode, and a current detector is fixedly connected to the bottom of the electric telescopic rod.
Preferably, the inner side wall of the ring body rod is fixedly connected with a plurality of connecting rods distributed in an annular mode, and the connecting rods are fixedly connected to the disc outline of the top disc body.
Preferably, the connecting columns are fixedly connected to the front side wall and the rear side wall of the mounting plate body at intervals, and the connecting columns are fixedly connected to the inner side wall of the driving rack.
Preferably, the driving wheel component comprises a driving shaft which is rotatably connected to the driving frame;
the front end part and the rear end part of the driving shaft are fixedly connected with driving wheels;
the driving wheel component further comprises a gear box body assembled on the driving shaft, and the gear box body is in transmission connection with a power input motor.
Preferably, the roller part comprises rollers rotatably connected to the front side and the rear side of the driving rack, the rollers are fixedly connected with wheel shafts, and the wheel shafts are rotatably connected to the driving rack.
Preferably, the right side wall of the driving frame is fixedly connected with a plurality of obstacle-removing shovel components arranged at intervals in the front and at intervals in the rear.
Preferably, the obstacle removing shovel parts comprise obstacle removing shovels, the obstacle removing shovels are fixedly connected with connecting rods, and the connecting rods are fixedly connected to the driving rack.
Preferably, the left side of the top of the driving rack is fixedly connected with a solar polished section.
Preferably, the solar panel part comprises a stand column fixedly connected to the left side of the top of the driving machine frame, and the top of the stand column is fixedly connected with a solar panel;
the driving rack is provided with a power supply which is electrically connected with the solar light panel, and the power supply is electrically connected with the electric telescopic rod.
Compared with the prior art, the invention has the following advantages:
the invention discloses a distribution network ground fault selection section device, which is characterized in that a driving rack is designed, a driving wheel component is connected to the rear side of the driving rack, a roller component is assembled on the left side of the driving rack, an installation disc body is fixedly connected to the central part of the driving rack, a camera detection component is assembled on the top of the installation disc body and comprises a driving motor fixedly connected to the top of the installation disc body, an output shaft of the driving motor is vertically arranged upwards, a top disc body is fixedly connected to the output shaft of the driving motor, a ring body rod is concentrically arranged on the top disc body, a plurality of cameras are fixedly connected to the bottom of the ring body rod, the distribution network ground fault selection section device also comprises a plurality of current detection components symmetrically arranged on the front side and the rear side of the top of the driving rack, each current detection component comprises a folded rod fixedly connected to the driving rack, and an electric telescopic, the electric telescopic rod is connected to the folding rod in a sliding mode, and a current detector is fixedly connected to the bottom of the electric telescopic rod.
By adopting the device component, the fault point can be quickly found, the efficiency of finding the fault point by designing the device component is high, the finding is rapid, and the troubleshooting efficiency is effectively improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an image pickup detection unit according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of another view of the embodiment of FIG. 2;
FIG. 4 is a schematic structural diagram of the embodiment of the present invention shown in FIG. 1 from another viewing angle;
FIG. 5 is a top view of the embodiment of the present invention in FIG. 1;
FIG. 6 is a schematic structural diagram of a current detection unit according to an embodiment of the present invention;
FIG. 7 is a front view of FIG. 1 in an embodiment of the present invention;
fig. 8 is a right side view in an embodiment of the present invention.
Detailed Description
The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.
As shown in fig. 1-8, a distribution network ground fault fine-selection section selection device comprises a drive rack 1, wherein a drive wheel component is connected to the rear side of the drive rack 1, and a roller component is assembled on the left side of the drive rack 1;
the central part of the driving rack 1 is fixedly connected with a mounting disk body, and the top of the mounting disk body is provided with a camera detection component;
the camera shooting detection component comprises a driving motor 84 fixedly connected to the top of the mounting disc body, an output shaft of the driving motor 84 is vertically arranged upwards, an output shaft 83 of the driving motor 84 is fixedly connected with a top disc body 811, and a ring body rod 81 is concentrically arranged on the top disc body 811;
the bottom of the ring body rod 81 is fixedly connected with a plurality of cameras 82 (the cameras 82 arranged in a ring shape can quickly observe the ground for exploration at multiple angles, so that whether a fault point is physically damaged or not can be quickly found out);
the distribution network ground fault selection and section selection device also comprises a plurality of current detection components which are symmetrically arranged at the front side and the rear side of the top of the driving rack 1;
the current detection part comprises a folding rod 4 fixedly connected to the driving rack 1, an electric telescopic rod 5 is assembled on the folding rod 4, the electric telescopic rod 5 is connected to the folding rod 4 in a sliding mode, and a current detector 6 is fixedly connected to the bottom of the electric telescopic rod 5. The current detector 6 is an inductor for detecting the ground current disclosed in the prior art.
The inner side wall of the ring body rod 81 is fixedly connected with a plurality of connecting rods 812 distributed annularly, and the connecting rods 812 are fixedly connected to the plate profile of the top plate body 811.
The spliced pole that the interval set up around equal fixedly connected with on the lateral wall around above-mentioned installation disk body, spliced pole fixed connection is on the inside wall of drive frame 1.
The driving wheel component comprises a driving shaft 32, and the driving shaft 32 is rotatably connected to the driving rack 1;
the driving wheels 31 are fixedly connected to the front and rear ends of the driving shaft 32;
the driving wheel assembly further includes a gear housing 33 assembled on the driving shaft 32, the gear housing 33 is in transmission connection with a power input motor, specifically, a driven gear is fixedly connected on the driving shaft 32, a transmission gear engaged with the driven gear is assembled in the gear housing 33 (gear box) according to the conventional manner, and an output shaft of the driving motor 84 is fixedly connected with a driving gear engaged with the transmission gear.
The roller part comprises rollers which are rotatably connected to the front side and the rear side of the driving rack 1, wherein the rollers are fixedly connected with wheel shafts, and the wheel shafts are rotatably connected to the driving rack 1.
In order to avoid the influence of obstacles on the ground in the process of searching fault points on the ground by the whole device, a right side wall of the driving rack 1 is fixedly connected with a plurality of obstacle removing shovel components arranged at intervals in front of and behind the driving rack. The obstacle removing shovel component comprises an obstacle removing shovel 2, the obstacle removing shovel 2 is fixedly connected with a connecting rod 21, and the connecting rod 21 is fixedly connected to a driving rack 1.
The left side of the top of the driving frame 1 is fixedly connected with a solar light panel component. The solar light panel component comprises a vertical column 71 fixedly connected to the left side of the top of the driving rack 1, and a solar light panel 7 is fixedly connected to the top of the vertical column 71.
The driving rack 1 is provided with a power supply which is electrically connected with the solar light panel, and the power supply is electrically connected with the electric telescopic rod 5.
The whole device is driven to patrol on the ground, the driving motor 84 is started, the ring body rod 81 rotates and carries the plurality of cameras 82 to rotate, the cameras 82 pick up the images of the ground condition of the buried cable power grid according to the existing mode, and the images and videos are transmitted to the background for the inspection of operators.
In the process, the whole device runs on the ground, and when a suspected fault point is met, the electric telescopic rod 5 drives the current detector 6 to move downwards until the current detector 6 contacts the ground to sense the ground current.
By adopting the device component, the fault point can be quickly found, the efficiency of finding the fault point by designing the device component is high, the finding is rapid, and the troubleshooting efficiency is effectively improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A distribution network ground fault selection and section selection device is characterized by comprising a driving rack, wherein the rear side of the driving rack is connected with a driving wheel component, and the left side of the driving rack is provided with a roller component;
the central part of the driving rack is fixedly connected with a mounting disc body, and the top of the mounting disc body is provided with a camera detection component;
the camera shooting detection part comprises a driving motor fixedly connected to the top of the mounting disc body, an output shaft of the driving motor is vertically arranged upwards, an output shaft of the driving motor is fixedly connected with a top disc body, and the top disc body is concentrically provided with an annular rod;
the bottom of the ring body rod is fixedly connected with a plurality of cameras;
the distribution network ground fault selection section selection device also comprises a plurality of current detection parts which are symmetrically arranged at the front side and the rear side of the top of the drive machine frame;
the current detection part comprises a folding rod fixedly connected to the driving rack, an electric telescopic rod is assembled on the folding rod, the electric telescopic rod is connected to the folding rod in a sliding mode, and a current detector is fixedly connected to the bottom of the electric telescopic rod.
2. The distribution network ground fault fine-selection section selection device according to claim 1, wherein a plurality of connecting rods distributed annularly are fixedly connected to the inner side wall of the ring body rod, and the connecting rods are fixedly connected to the disc profile of the top disc body.
3. The distribution network ground fault selecting and section selecting device of claim 2, wherein connecting columns are fixedly connected to the front side wall and the rear side wall of the mounting tray body at intervals, and the connecting columns are fixedly connected to the inner side wall of the driving rack.
4. The distribution network ground fault fine selection section selection device of claim 3, wherein the drive wheel assembly comprises a drive shaft, the drive shaft being rotatably connected to a drive rack;
the front end part and the rear end part of the driving shaft are fixedly connected with driving wheels;
the driving wheel component further comprises a gear box body assembled on the driving shaft, and the gear box body is in transmission connection with a power input motor.
5. The distribution network ground fault fine selection section selection device according to claim 4, wherein the roller component comprises rollers rotatably connected to the front side and the rear side of the drive rack, the rollers are fixedly connected with wheel shafts, and the wheel shafts are rotatably connected to the drive rack.
6. The distribution network ground fault fine-selection section selection device of claim 5, wherein a plurality of obstacle-removing shovel components arranged at intervals in front and back are fixedly connected to the right side wall of the driving rack.
7. The distribution network ground fault selection section selection device of claim 6, wherein the obstacle removing shovel components each comprise an obstacle removing shovel, the obstacle removing shovel is fixedly connected with a connecting rod, and the connecting rod is fixedly connected to a driving rack.
8. The distribution network ground fault fine-selection section selection device according to claim 7, wherein a solar light panel component is fixedly connected to the left side of the top of the driving rack.
9. The distribution network ground fault fine-selection section selection device of claim 8, wherein the solar panel component comprises a vertical column fixedly connected to the left side of the top of the driving machine frame, and the top of the vertical column is fixedly connected with a solar panel;
the driving rack is provided with a power supply which is electrically connected with the solar light panel, and the power supply is electrically connected with the electric telescopic rod.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011012860.9A CN112180209B (en) | 2020-09-24 | 2020-09-24 | Distribution network ground fault selection and section selection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011012860.9A CN112180209B (en) | 2020-09-24 | 2020-09-24 | Distribution network ground fault selection and section selection device |
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| CN112180209A true CN112180209A (en) | 2021-01-05 |
| CN112180209B CN112180209B (en) | 2023-01-20 |
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| CN114776982A (en) * | 2022-03-29 | 2022-07-22 | 淮北金邦新型材料有限公司 | Safe production device for environment-friendly resin production and application thereof |
| CN116593828A (en) * | 2023-07-17 | 2023-08-15 | 国网山东省电力公司邹城市供电公司 | Distribution network ground fault detection device |
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|---|---|
| CN112180209B (en) | 2023-01-20 |
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