CN110672994A - Internal arc fault test method for prefabricated substation - Google Patents
Internal arc fault test method for prefabricated substation Download PDFInfo
- Publication number
- CN110672994A CN110672994A CN201910938529.0A CN201910938529A CN110672994A CN 110672994 A CN110672994 A CN 110672994A CN 201910938529 A CN201910938529 A CN 201910938529A CN 110672994 A CN110672994 A CN 110672994A
- Authority
- CN
- China
- Prior art keywords
- substation
- arc fault
- internal arc
- transformer substation
- prefabricated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B7/00—Enclosed substations, e.g. compact substations
- H02B7/06—Distribution substations, e.g. for urban network
Abstract
The invention discloses an internal arc fault test method of a prefabricated substation, which realizes the internal arc fault test of the prefabricated substation by building an experiment platform, selecting an experiment tool, determining an experiment judgment standard, carrying out the internal arc fault test of the prefabricated substation and the like, and obviously improves the safety of the prefabricated substation.
Description
Technical Field
The invention relates to the technical field of transformer substation safety detection, in particular to an internal arc fault test method for a pre-installed transformer substation.
Background
The box transformer is a factory prefabricated indoor and outdoor compact distribution equipment with high-voltage switch equipment, distribution transformer and low-voltage distribution equipment, etc. arranged into one body according to a certain arrangement scheme. The box-type transformer is divided into an European box transformer (European transformer) and an American box transformer (American transformer), wherein the American transformer is widely applied due to the advantages of small volume, small floor area, convenience for security and the like. However, in recent years, the american transformer has been replaced by the european transformer because of its low power supply reliability, inability to improve capacity, and the like, and has been developed for use in a replacement type pre-installed substation in order to install the european transformer by using the original american transformer to install civil works.
However, in order to ensure high safety of the pre-installed substation after installation, it is necessary to check the safety of the low-voltage cabinet of the pre-installed substation in the event of a high-voltage internal arc fault.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention solves the technical problem of an internal arc fault test method for a pre-installed substation, which can be used for testing the safety of a low-voltage cabinet of the pre-installed substation in the event of a high-voltage internal arc fault.
In order to solve the technical problems, the technical scheme adopted by the invention specifically comprises the following contents:
an internal arc fault test method of a pre-installed substation comprises the following steps:
building an experiment platform;
selecting an experimental tool;
determining an experimental judgment standard;
and carrying out an internal arc fault test of the prefabricated substation.
Preferably, the experimental platform comprises the following steps:
establishing a simulation platform: a prefabricated cement plate or a steel plate is used for making a simulation platform, a cable trench matched with the actual aesthetic size is arranged on the simulation platform, and an inclined plane is arranged on the simulation platform and positioned below a pressure relief channel of the ring main unit;
fixing the prefabricated substation: fixing the prefabricated substation on an analog platform, wherein the projection of a pressure relief channel of the prefabricated substation is completely positioned on an inclined plane;
sealing the bottom of the low-voltage cabinet: and (3) plugging the bottom of the low-voltage cabinet of the pre-installed transformer substation by using a self-leveling flexible material.
Preferably as above-mentioned scheme, the laboratory glassware is including setting up test console, circuit breaker, transformer, first high tension cable, second high tension cable and a plurality of indicator in the prepackage type transformer substation outside, test console with the circuit breaker electricity of prepackage type transformer substation is connected, the circuit breaker passes through first high tension cable is connected the high-voltage board, the transformer passes through second high tension cable is connected the circuit breaker, a plurality of the indicator is evenly pasted the outer wall of prepackage type transformer substation.
Preferably, the inclination angle of the inclined plane is equal to 45 ℃.
Preferably, a step of building an experimental partition wall is further performed between the step of manufacturing the simulation platform and the step of fixing the pre-installed substation, and the method specifically comprises the following steps: and constructing experiment isolation walls around and right above the simulation platform.
Preferably, the experimental judgment standard comprises an arc starting mode requirement and a test qualification requirement.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses an internal arc fault test method of a prefabricated substation, which realizes the internal arc fault test of the prefabricated substation by building an experiment platform, selecting an experiment tool, determining an experiment judgment standard, carrying out the internal arc fault test of the prefabricated substation and the like, and obviously improves the safety of the prefabricated substation.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of an experimental platform according to the present invention;
wherein the reference numerals in fig. 1 are:
1. a pre-installed substation; 2. a simulation platform; 3. a bevel; 4. a pressure relief channel; 5. a cable trench; 6. a partition wall; 7. a first high voltage cable; 8. a transformer; 9. a test console; 10. an indicator; 11. a circuit breaker; 12. a second high voltage cable.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention with reference to the accompanying drawings and preferred embodiments is as follows:
the invention discloses an internal arc fault test method of a pre-installed substation, which comprises the following steps:
building an experiment platform;
selecting an experimental tool;
determining an experimental judgment standard;
an internal arc fault test of the preassembled transformer substation 1 is performed.
Preferably, the experimental platform comprises the following steps:
as shown in fig. 1, a simulation platform 2 is prepared: a prefabricated cement plate or a steel plate is used for making a simulation platform 2, a cable trench 5 matched with the actual aesthetic size is arranged on the simulation platform 2, and an inclined plane 3 is arranged on the simulation platform 2 and is positioned below a ring main unit pressure relief channel 4;
fixing the prefabricated substation 1: the prefabricated substation 1 is fixed on the simulation platform 2, and the projection of the pressure relief channel 4 of the prefabricated substation 1 is positioned on the inclined plane 3, so that arc light and high voltage can act on the inclined plane 3.
Sealing the bottom of the low-voltage cabinet: utilize self-leveling flexible material to carry out the shutoff to the low-voltage cabinet bottom of prepackage type transformer substation 1, this is because self-leveling flexible material has water-fast, resistant oil, acid and alkali resistance, salt fog resistance corrosivity and convenient some of filling to through utilizing self-leveling flexible material to carry out the shutoff to low-voltage cabinet bottom and can prevent that dust, moisture, toy or insect etc. from getting into the low-voltage cabinet, during the specific use, self-leveling flexible material includes with epoxy board etc..
In the invention, the experimental tool comprises a test console 9, a circuit breaker 11, a transformer 8, a first high-voltage cable 7, a second high-voltage cable 12 and a plurality of indicators 10 which are arranged outside the pre-installed substation 1, wherein the test console 9 is electrically connected with the circuit breaker 11, the circuit breaker 11 is connected with the high-voltage cabinet through the first high-voltage cable 7, the transformer 8 is connected with the circuit breaker 11 through the second high-voltage cable 12, and the indicators 10 are uniformly adhered to the outer wall of the pre-installed substation.
Before the experiment, at first with the high-voltage board short circuit of prepackage type transformer substation 1 of copper line, after beginning the experiment, pass through test control console 9 control circuit breaker 11 closes a floodgate, this moment first high tension cable 7 with second high tension cable 12 intercommunication, transformer 8 provides the heavy current through first high tension cable 7 and second high tension cable 12 to prepackage type transformer substation 1, because the short circuit of hyperbaric chamber, in case through the heavy current just can take place the arcing, treat 1 minute after, test control console 9 control circuit breaker 11 disconnection, this moment first high tension cable 7 and second high tension cable 12 do not communicate, transformer 8 stop to prepackage type transformer substation 1 provides the electric current. And after the arcing is finished, observing whether the door of the high-low voltage cabinet of the preassembled transformer substation 1 is deformed and whether the indicator 10 burns or is burnt.
In order to enable all projections of the pressure relief channel 4 to be located on the inclined plane 3, the size of the inclination angle of the inclined plane 3 should be greater than 0 and less than or equal to 90 ℃, and moreover, when the size of the inclination angle of the inclined plane 3 is 45 degrees, the pressure relief space of the ring main unit is the largest, and the material of the inclined plane 3 is the least, so that the size of the inclination angle of the inclined plane 3 is preferably 45 degrees.
In order to avoid damage to people or objects around the experimental platform due to the internal arc fault test of the prefabricated substation 1, a step of building a partition wall 6 is also performed between the step of manufacturing the simulation platform 2 and the step of fixing the prefabricated substation 1, and the steps are specifically as follows: a partition wall 6 is built outside the simulation platform 2, so that damage to personnel, test consoles 9 or articles around the test platform can be avoided by the partition wall 6.
Preferably, the experimental evaluation criteria include an arc starting mode requirement and an experimental qualification requirement, specifically: the arc starting mode needs to meet the relevant requirements of the national standard GB/T17467, and the test qualification requirements are that the relevant requirements of the GB/T17467 are met, the high-pressure chamber door and the low-pressure chamber door are not deformed, and the indicator 10 attached to the outside of the chamber door is not ignited.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (6)
1. An internal arc fault test method of a pre-installed substation is characterized by comprising the following steps:
building an experiment platform;
selecting an experimental tool;
determining an experimental judgment standard;
and carrying out an internal arc fault test of the prefabricated substation.
2. The internal arc fault testing method of the preassembled transformer substation of claim 1, wherein the building of the experimental platform comprises the following steps:
establishing a simulation platform: a prefabricated cement plate or a steel plate is used for making a simulation platform, a cable trench matched with the actual aesthetic size is arranged on the simulation platform, and an inclined plane is arranged on the simulation platform and positioned below a pressure relief channel of the ring main unit;
fixing the prefabricated substation: fixing the prefabricated substation on an analog platform, wherein the projection of a pressure relief channel of the prefabricated substation is positioned on an inclined plane;
sealing the bottom of the low-voltage cabinet: and (3) plugging the bottom of the low-voltage cabinet of the pre-installed transformer substation by using a self-leveling flexible material.
3. The method for internal arc fault testing of the preassembled transformer substation of claim 2, wherein the testing tool comprises a testing console, a circuit breaker, a transformer, a first high-voltage cable, a second high-voltage cable and a plurality of indicators, the testing console is arranged outside the preassembled transformer substation and is electrically connected with the circuit breaker of the preassembled transformer substation, the circuit breaker is connected with the high-voltage cabinet through the first high-voltage cable, the transformer is connected with the circuit breaker through the second high-voltage cable, and the indicators are uniformly adhered to the outer wall of the preassembled transformer substation.
4. The internal arc fault testing method of a preassembled transformer substation of claim 2, characterized in that the inclination angle of the inclined plane is equal to 45 ℃.
5. The internal arc fault test method of the preassembled transformer substation of claim 2, wherein a step of building an experimental partition wall is further provided between the step of manufacturing the simulation platform and the step of fixing the preassembled transformer substation, and specifically comprises the steps of: and building an experiment partition wall right above the simulation platform.
6. The internal arc fault testing method of the preassembled transformer substation of claim 3, wherein the test evaluation criteria include an arcing mode requirement and a test qualification requirement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910938529.0A CN110672994A (en) | 2019-09-30 | 2019-09-30 | Internal arc fault test method for prefabricated substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910938529.0A CN110672994A (en) | 2019-09-30 | 2019-09-30 | Internal arc fault test method for prefabricated substation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110672994A true CN110672994A (en) | 2020-01-10 |
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| CN201910938529.0A Pending CN110672994A (en) | 2019-09-30 | 2019-09-30 | Internal arc fault test method for prefabricated substation |
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Citations (5)
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|---|---|---|---|---|
| US20030169051A1 (en) * | 2002-03-05 | 2003-09-11 | Tallman David M. | Testing device for detecting and locating arc faults in an electrical system |
| CN103245897A (en) * | 2013-05-02 | 2013-08-14 | 复旦大学 | Detection method for photovoltaic system direct current fault arc by using multicriterion |
| CN107356816A (en) * | 2017-06-22 | 2017-11-17 | 国家电网公司 | A kind of capacitive equipment dielectric loss on-line checking table |
| CN109346938A (en) * | 2018-11-30 | 2019-02-15 | 江苏其厚智能电气设备有限公司 | A kind of miniaturization preassembled transformer station high-voltage board cable vault |
| CN208588797U (en) * | 2018-06-22 | 2019-03-08 | 河南省高压电器研究所有限公司 | Inside switch cabinet arc test device |
-
2019
- 2019-09-30 CN CN201910938529.0A patent/CN110672994A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030169051A1 (en) * | 2002-03-05 | 2003-09-11 | Tallman David M. | Testing device for detecting and locating arc faults in an electrical system |
| CN103245897A (en) * | 2013-05-02 | 2013-08-14 | 复旦大学 | Detection method for photovoltaic system direct current fault arc by using multicriterion |
| CN107356816A (en) * | 2017-06-22 | 2017-11-17 | 国家电网公司 | A kind of capacitive equipment dielectric loss on-line checking table |
| CN208588797U (en) * | 2018-06-22 | 2019-03-08 | 河南省高压电器研究所有限公司 | Inside switch cabinet arc test device |
| CN109346938A (en) * | 2018-11-30 | 2019-02-15 | 江苏其厚智能电气设备有限公司 | A kind of miniaturization preassembled transformer station high-voltage board cable vault |
Non-Patent Citations (2)
| Title |
|---|
| 张宝伟: ""高压柜内部电弧试验"", 《黑龙江科学》 * |
| 白兵占: ""环网柜的内部故障电弧试验"", 《产品与解决方案》 * |
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Application publication date: 20200110 |