CN113203961A - Line fault simulation device and line fault simulation method - Google Patents
Line fault simulation device and line fault simulation method Download PDFInfo
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- CN113203961A CN113203961A CN202110484148.7A CN202110484148A CN113203961A CN 113203961 A CN113203961 A CN 113203961A CN 202110484148 A CN202110484148 A CN 202110484148A CN 113203961 A CN113203961 A CN 113203961A
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- switches
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- line fault
- fault simulation
- disconnecting link
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- 238000004088 simulation Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 14
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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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
- G01R31/58—Testing of lines, cables or conductors
Abstract
The invention discloses a line fault simulation device and a line fault simulation method, the line fault simulation device comprises a vacuum circuit breaker and a disconnecting link, the vacuum circuit breaker is provided with three incoming line ends, three outgoing line ends and three switches, one ends of the three switches are connected with the three incoming line ends in a one-to-one correspondence manner, the other ends of the three switches are connected with the three outgoing line ends in a one-to-one correspondence manner, the three incoming line ends are respectively connected with three live wires in a three-phase line, the three outgoing line ends are in short circuit, the disconnecting link is provided with a first end and a second end, the first end is connected with one outgoing line end, and the second end is grounded. The line fault simulation device can safely and reliably simulate the overcurrent fault or zero sequence work of the three-phase line.
Description
Technical Field
The invention relates to the technical field of simulation devices, in particular to a line fault simulation device and a line fault simulation method.
Background
At present, the automatic switch is widely applied to distribution lines, and according to the construction requirements of the current distribution network lines, the automatic switch is installed on each connection feeder line group, so that the automatic switch can be self-healed in place, the automatic isolation of fault sections is met, and the power supply function of non-fault sections is recovered. In order to test whether the self-healing function can operate correctly, warehouse debugging can be performed before the automatic switch is installed on the feeder line, but after the automatic switch is installed on the feeder line, whether the self-healing function of the automatic switch can operate correctly can be judged only through the occurrence of line faults. However, until now there has been no device or method that can safely and reliably simulate a line fault.
Disclosure of Invention
The invention aims to provide a line fault simulation device and a line fault simulation method, so as to solve the problem that no device or method can safely and reliably simulate line faults at present.
In order to achieve the purpose, the invention adopts the following technical scheme:
a line fault simulation apparatus comprising:
the vacuum circuit breaker is provided with three wire inlet ends, three wire outlet ends and three switches, wherein one ends of the three switches are connected with the three wire inlet ends in a one-to-one correspondence manner, the other ends of the three switches are connected with the three wire outlet ends in a one-to-one correspondence manner, the three wire inlet ends are respectively connected with three live wires in a three-phase line, and the three wire outlet ends are in short circuit;
the disconnecting link is provided with a first end and a second end, the first end is connected with one of the wire outlet ends, and the second end is grounded.
Preferably, the remote control device further comprises a remote controller, and the remote controller can control the opening and closing of the three switches respectively.
Preferably, the grounding device further comprises a grounding pin, and the grounding pin is connected to the second end.
Preferably, the three outlet ends are in short circuit through copper bars.
Preferably, the vacuum circuit breaker is located in the trolley.
Preferably, the housing of the trolley is made of an insulating material.
A line fault simulation method adopts the line fault simulation device and comprises the following steps:
s10: powering off the three-phase line;
s20: connecting three incoming line ends of a vacuum circuit breaker to three live lines of the three-phase line respectively, and grounding the second end of the disconnecting link;
s30: energizing the three-phase line;
s40: and controlling the opening or closing of each of the three switches and the opening or closing of the knife switch to simulate a line fault.
Preferably, S40 includes: and controlling any two of the three switches to be closed, the other switch to be opened and the disconnecting link to be opened so as to simulate overcurrent faults.
Preferably, S40 further includes: and controlling any one switch to be closed, the other two switches to be opened, and the disconnecting link to be closed to simulate zero sequence work.
Preferably, S11 between S10 and S20;
s11: and controlling the three switches to be in an off state, and controlling the disconnecting link to be in an off state.
The invention has the beneficial effects that: the invention provides a line fault simulation device and a line fault simulation method, the line fault simulation device comprises a vacuum circuit breaker and a disconnecting link, the vacuum circuit breaker is provided with three incoming line ends, three outgoing line ends and three switches, one ends of the three switches are connected with the three incoming line ends in a one-to-one correspondence mode, the other ends of the three switches are connected with the three outgoing line ends in a one-to-one correspondence mode, the three incoming line ends are respectively connected with three live wires in a three-phase line, the three outgoing line ends are in short circuit, the disconnecting link is provided with a first end and a second end, the first end is connected with one outgoing line end, and the second end is grounded. When any two switches of the three switches are closed, two lines connected with the two switches are in short circuit, so that the effect of simulating overcurrent faults of a three-phase line can be achieved; the three wire outlet ends of the vacuum circuit breaker are connected with the disconnecting link after being in short circuit, the other end of the disconnecting link is grounded, when the disconnecting link is closed, the wire outlet ends are grounded, when any one of the three switches is closed, the circuit connected with the switch is grounded, and therefore the effect of simulating zero sequence work of a three-phase circuit can be achieved. The line fault simulation device can safely and reliably simulate the overcurrent fault or zero sequence work of the three-phase line.
Drawings
Fig. 1 is a schematic structural diagram of a line fault simulation apparatus according to an embodiment of the present invention.
In the figure:
1. a vacuum circuit breaker; 2. a disconnecting link; 3. and a grounding pin.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
Example 1:
the invention provides a line fault simulation device, as shown in figure 1, the line fault simulation device comprises a vacuum circuit breaker 1 and a disconnecting link 2, wherein the vacuum circuit breaker 1 is provided with three incoming line ends, three outgoing line ends and three switches, one ends of the three switches are connected with the three incoming line ends in a one-to-one correspondence manner, the other ends of the three switches are connected with the three outgoing line ends in a one-to-one correspondence manner, the three incoming line ends are respectively connected with three live wires in a three-phase line, the three outgoing line ends are in short circuit, the disconnecting link 2 is provided with a first end and a second end, the first end is connected with one outgoing line. When any two of the three switches are closed, two lines connected with the two switches are in short circuit, so that the effect of simulating overcurrent faults of a three-phase line can be achieved; three outlet ends of the vacuum circuit breaker 1 are connected with the disconnecting link 2 after being in short circuit, the other end of the disconnecting link 2 is grounded, when the disconnecting link 2 is closed, the outlet ends are grounded, when any one of the three switches is closed, the circuit connected with the switch is grounded, and therefore the effect of simulating zero sequence work of a three-phase circuit can be achieved. The line fault simulation device can safely and reliably simulate the overcurrent fault or zero sequence work of the three-phase line.
Optionally, the system further comprises a remote controller, and the remote controller can control the opening and closing of the three switches respectively. The accessible remote controller carries out artifical remote control to vacuum circuit breaker 1, has guaranteed staff's personal safety, and labour saving and time saving.
Optionally, a grounding pin 3 is further included, and the grounding pin 3 is connected to the second end. The second end of the vacuum circuit breaker 1 is grounded through the grounding pin 3, and the operation is convenient.
Preferably, the three outlet terminals are short-circuited by a copper bar. The copper has good conductivity and low price, and the three wire outlet ends are short-circuited by the copper strips, so that the copper-clad cable is easy to operate and durable.
Optionally, a trolley is also included, the vacuum interrupter 1 being located within the trolley. The vacuum circuit breaker 1 is placed in the trolley, and the vacuum circuit breaker 1 is conveniently moved to each position to simulate line faults.
Preferably, the housing of the trolley is made of an insulating material. The shell is made of insulating materials, so that the shell can be prevented from conducting electricity, and the personal safety of workers and the normal work of equipment are guaranteed.
Example 2:
the invention also provides a line fault simulation method, which adopts the line fault simulation device and comprises the following steps:
s10: powering off the three-phase line;
s20: connecting three incoming line ends of the vacuum circuit breaker 1 to three live lines of a three-phase line respectively, and grounding a second end of the disconnecting link 2;
s30: electrifying the three-phase line;
s40: the opening or closing of each of the three switches, and the opening or closing of the knife switch 2, is controlled to simulate a line fault.
By controlling the opening or closing of the three switches and the disconnecting link 2 in the vacuum circuit breaker 1, the simulation of transient or permanent short circuit or ground fault between the phases is realized.
Preferably, S40 includes: any two of the three switches are controlled to be closed, the other switch is controlled to be open, and the knife switch 2 is controlled to be open, so that overcurrent faults are simulated. And (3) the disconnecting link 2 is disconnected, two switches in the three switches are closed, the other switch is disconnected, and then the two-phase line connected with the two closed switches is short-circuited, so that the overcurrent fault can be simulated.
Preferably, S40 further includes: and controlling any switch to be closed, the other two switches to be opened, and the disconnecting link 2 to be closed to simulate zero sequence work. When one of the three switches in the vacuum circuit breaker 1 is closed, the other two switches are opened, and the knife switch 2 is closed, the circuit connected with the closed switch is grounded through the grounding pin 3, so that zero sequence operation is simulated.
Optionally, S11 between S10 and S20;
s11: the three switches are controlled to be in an off state, and the disconnecting link 2 is controlled to be in an off state. After three switches of the vacuum circuit breaker 1 are all disconnected, the three-phase circuit is connected, personal safety of workers can be guaranteed, and damage caused by faults of power distribution equipment can be avoided.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A line fault simulation apparatus, comprising:
the vacuum circuit breaker (1) is provided with three wire inlet ends, three wire outlet ends and three switches, one ends of the three switches are connected with the three wire inlet ends in a one-to-one corresponding mode, the other ends of the three switches are connected with the three wire outlet ends in a one-to-one corresponding mode, the three wire inlet ends are respectively connected with three live wires in a three-phase line, and the three wire outlet ends are in short circuit;
the disconnecting link (2) is provided with a first end and a second end, the first end is connected with one of the wire outlet ends, and the second end is grounded.
2. The line fault simulator of claim 1, further comprising a remote controller capable of controlling the opening and closing of three of said switches, respectively.
3. The line fault simulation device according to claim 1, further comprising a grounding pin (3), the grounding pin (3) being connected to the second end.
4. The line fault simulator of claim 1, wherein three of said outlets are shorted by a copper strap.
5. Line fault simulation device according to claim 1, characterized in that it further comprises a trolley, the vacuum circuit breaker (1) being located inside the trolley.
6. The line fault simulation device of claim 5, wherein the housing of the trolley is made of an insulating material.
7. A line fault simulation method using the line fault simulation apparatus according to any one of claims 1 to 6, comprising:
s10: powering off the three-phase line;
s20: connecting the three incoming lines of a vacuum circuit breaker (1) to the three live lines of the three-phase line respectively, and grounding the second end of the disconnecting link (2);
s30: energizing the three-phase line;
s40: controlling the opening or closing of each of the three switches, and the opening or closing of the knife switch (2), to simulate a line fault.
8. The line fault simulation method of claim 7, wherein S40 comprises: and controlling any two of the three switches to be closed, the other switch to be opened and the disconnecting link (2) to be opened so as to simulate overcurrent faults.
9. The line fault simulation method of claim 7, wherein S40 further comprises: and controlling any one switch to be closed, the other two switches to be opened, closing the disconnecting link (2) and simulating zero sequence work.
10. The line fault simulation method of claim 7, further comprising S11 between S10 and S20;
s11: and controlling the three switches to be in an off state, and controlling the disconnecting link (2) to be in an off state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110484148.7A CN113203961A (en) | 2021-04-30 | 2021-04-30 | Line fault simulation device and line fault simulation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110484148.7A CN113203961A (en) | 2021-04-30 | 2021-04-30 | Line fault simulation device and line fault simulation method |
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| Publication Number | Publication Date |
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| CN113203961A true CN113203961A (en) | 2021-08-03 |
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| CN202110484148.7A Pending CN113203961A (en) | 2021-04-30 | 2021-04-30 | Line fault simulation device and line fault simulation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN206379635U (en) * | 2016-12-16 | 2017-08-04 | 云南电网有限责任公司玉溪供电局 | A kind of 10kV overhead transmission lines short circuit and earth fault experiment high-tension switch cabinet |
| CN110581378A (en) * | 2019-09-17 | 2019-12-17 | 国网河北省电力有限公司 | Spiral grounding pin equipment |
| CN112051485A (en) * | 2020-09-11 | 2020-12-08 | 广东电网有限责任公司电力科学研究院 | Intelligent ground fault simulation device and method for overhead line and terminal equipment |
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2021
- 2021-04-30 CN CN202110484148.7A patent/CN113203961A/en active Pending
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| CN102313850A (en) * | 2011-06-24 | 2012-01-11 | 中国电力科学研究院 | Physical real-time dynamic simulation device for flexible direct current transmission system |
| CN203881875U (en) * | 2014-06-11 | 2014-10-15 | 国家电网公司 | Low-voltage three-phase line fault generator |
| CN105405341A (en) * | 2015-06-09 | 2016-03-16 | 许昌许继昌南通信设备有限公司 | Simulation factory power supply teaching experiment apparatus |
| CN204809429U (en) * | 2015-07-21 | 2015-11-25 | 国家电网公司 | Multi -functional grounding pin |
| CN106816789A (en) * | 2015-12-01 | 2017-06-09 | 陈祖蓉 | The grounding pin of electric power transmission construction mesolow cable unwrapping wire |
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