CN111504507A - Device and method for completing temperature rise test of multi-branch ring main unit by one-time wiring - Google Patents
Device and method for completing temperature rise test of multi-branch ring main unit by one-time wiring Download PDFInfo
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- CN111504507A CN111504507A CN202010412495.4A CN202010412495A CN111504507A CN 111504507 A CN111504507 A CN 111504507A CN 202010412495 A CN202010412495 A CN 202010412495A CN 111504507 A CN111504507 A CN 111504507A
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- current transformer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
A device and a method for completing temperature rise test of a multi-branch ring main unit simultaneously through one-time wiring comprise a control system, a voltage regulator, a large-current transformer, a current transformer, an automatic short-circuit device and a contactor. Through design control system and heavy current test device, through exerting test current simultaneously to the side of being qualified for the next round of competitions of each branch road of many branches of looped netowrk cabinet, realize developing the temperature rise test simultaneously to each branch road of many branches of looped netowrk cabinet to improve efficiency of software testing.
Description
Technical Field
The invention relates to the technical field of 10kV ring main unit testing, in particular to a device and a method for completing temperature rise test of a multi-loop ring main unit by one-time wiring.
Background
The detection of the power equipment is an important part for ensuring the operation safety of a power grid, and power users put forward higher requirements on power supply reliability and power supply safety along with the rapid development of social economy and increasing living standard of people in China. The detection of power equipment is an important part for ensuring the operation safety of a power grid, the intelligent power distribution network is greatly popularized in China at present, a ring main unit is a main power equipment of the intelligent power distribution network, the detection of the ring main unit is particularly important, and a temperature rise test is a very important test of the ring main unit. Generally speaking, when a temperature rise test is performed on a multi-branch ring main unit, a main loop applies test current, and due to shunting, the current on each branch loop cannot be guaranteed to reach a rated test current value, generally, a mode of treating every two units of the ring main unit as independent branches is adopted, the temperature rise test is performed on each branch of the ring main unit independently, the temperature rise test time is generally 5-8 hours, so that the time for completing the temperature rise test of all the branches of the whole ring main unit is very long, and the test efficiency is very low.
Disclosure of Invention
The invention provides a device and a method for simultaneously completing temperature rise test of 10kV multi-branch ring main unit by one-time wiring in order to solve the problem of low temperature rise test efficiency of the existing multi-branch ring main unit.
In order to achieve the purpose, the invention adopts the technical scheme that:
a device for completing temperature rise test simultaneously by once wiring of a multi-branch ring main unit is installed on a test article and comprises a control system, a voltage regulator, a large-current transformer, a current transformer, an automatic short-circuit device and a contactor;
a temperature sensor is arranged at the position of the test article;
the wire inlet side of the test article is connected with an automatic short-circuit device;
each branch on the outgoing line side of the test article is provided with a contactor for controlling on-off; each branch comprises three phases, and each phase is provided with a large-current transformer, a contactor and a voltage regulator;
the temperature sensor and the current transformer are connected with a signal input end of the control system, and a signal output end of the control system is connected with the voltage regulator and the automatic short-circuit device.
And three external terminals of the automatic short-circuit device are respectively connected with three phases of the test article inlet wire branch circuit to short-circuit the test article inlet wire end.
And the outgoing line side branch of the test article is sequentially connected with a large-current transformer, a contactor and a voltage regulator.
A method for completing temperature rise test in one-time wiring of a multi-branch ring main unit by using the test device comprises the following steps:
step 1: setting used branches according to the number of the branches of the ring main unit; setting a rated test current value of each branch circuit by combining name plate parameters of the ring main unit;
step 2: connecting a three-phase outlet terminal on the automatic short-circuit device with each of the test article inlet branch circuits respectively, and connecting the heavy-current transformer with the outlet branch circuit corresponding to the test article;
and step 3: attaching a temperature sensor of a control system to each branch of a test sample, and detecting the temperature of the branch in real time;
and 4, step 4: starting an instrument, controlling the automatic short-circuit device to act by a control system, driving a bus copper bar to move by rotating a motor in the automatic short-circuit device, and connecting 3 outgoing line terminals of the automatic short-circuit device to the bus copper bar after the bus copper bar moves in place so as to short-circuit three-phase incoming line terminals of a test sample;
step 6: the control system adjusts the voltage regulator on each branch circuit, and outputs the rated test current corresponding to the branch circuit of the test product to the large-current transformer of each branch circuit;
and 7: the current transformer measures the actual flowing current value of each branch of the test sample, and the measurement result is transmitted to the control system;
and 8: the control system judges whether the test current value flowing through each branch of the test article is a rated test current value or not according to the result measured by the mutual inductor 4 in real time;
if the current value is not the rated current value, the control system automatically adjusts the voltage regulator corresponding to the branch, and outputs the rated test current corresponding to the branch of the test product to the high-current transformer of each branch;
and step 9: repeating the step 6 to the step 8, simultaneously measuring the temperature rise value of the test sample in real time by the control system through the temperature sensor, and finishing the test when the temperature rise is stable; the control system records the temperature rise value as a final test result;
step 10: after the test is finished, the control system controls the automatic short-circuit device to act, a motor in the automatic short-circuit device rotates to drive the bus copper bar to move, and three wire outlet terminals of the automatic short-circuit device are disconnected with the bus copper bar; and meanwhile, the voltage regulator and the large-current transformer are regulated to enable the output of the voltage regulator and the large-current transformer to return to zero, and the contactor is controlled to be disconnected.
The beneficial effects created by the invention are as follows:
1. the temperature rise test device can simultaneously carry out the temperature rise test of each branch of the multi-branch ring main unit through one-time wiring, can monitor the temperature rise state of each branch of the multi-branch ring main unit, and can automatically judge whether the temperature rise is stable or not.
2. The invention can realize the simultaneous output of multiple paths of current, and simultaneously automatically adjust the test current to realize automatic detection.
3. According to the invention, the automatic short circuit and disconnection of the wire inlet side of the ring main unit can be completed by designing the automatic short circuit device, and manual wiring and disconnection are not needed.
4. The invention can greatly improve the efficiency of the temperature rise test of the multi-branch ring main unit.
Drawings
FIG. 1 is a schematic illustration of the experimental principle.
Detailed Description
The utility model provides a be used for temperature rise test device is accomplished simultaneously in wiring of many branch ring main units, installs on the sample, including control system 1, voltage regulator 2, heavy current transformer 3, current transformer 4, automatic short circuit device 5 and contactor 6.
And a temperature sensor is arranged at the position of the test article.
The inlet wire side of the test article is connected with an automatic short-circuit device 5. And three external terminals of the automatic short-circuit device 5 are respectively connected with three phases of the test article inlet wire branch circuits to short-circuit the test article inlet wire ends.
Each branch on the outgoing line side of the test article is provided with a contactor 6 for controlling on-off; each branch comprises three phases, and each phase is provided with a high-current transformer 3, a current transformer 4, a contactor 6 and a voltage regulator 2. The side circuit of the outgoing line of the test article is connected with a large current transformer 3, a current transformer 4, a contactor 6 and a voltage regulator 2 in sequence.
The temperature sensor and the current transformer 4 are connected with a signal input end of the control system 1, a signal output end of the control system 1 is connected with the voltage regulator 2 and the automatic short-circuit device 5, current and temperature signals can be collected, analyzed and judged through P L C in the control system 1, and corresponding control signals are sent out at the same time.
The test device carries out the temperature rise test of the maximum 1-inlet 6-outlet type ring main unit.
A method for completing temperature rise test in one-time wiring of a multi-branch ring main unit by using the test device comprises the following steps:
step 1: setting used branches according to the number of the branches of the ring main unit; setting a rated test current value of each branch circuit by combining name plate parameters of the ring main unit;
step 2: connecting a three-phase outlet terminal on the automatic short-circuit device 5 with each of the test article inlet branches respectively, and connecting the heavy-current transformer 3 with the outlet branch corresponding to the test article;
and step 3: attaching a temperature sensor of the control system 1 to each branch of the test sample, and detecting the temperature of the branch in real time;
and 4, step 4: starting an instrument, wherein the control system 1 controls the automatic short-circuit device 5 to act, a motor in the automatic short-circuit device 5 rotates to drive a bus copper bar to move, and after the bus copper bar moves in place, 3 wire outgoing terminals of the automatic short-circuit device 5 are connected to the bus copper bar, so that three-phase wire incoming terminals of a test sample are in short circuit;
step 6: the control system 1 adjusts the voltage regulator 2 on each branch circuit, and outputs the rated test current corresponding to the branch circuit of the test product to the large-current transformer 3 of each branch circuit;
and 7: the current transformer 4 measures the actual flowing current value of each branch of the test sample, and the measurement result is transmitted to the control system 1;
and 8: the control system 1 judges whether the test current value flowing through each branch of the test article is a rated test current value or not according to the measurement result of the mutual inductor 4 in real time;
if the current value is not the rated current value, the control system 1 automatically adjusts the voltage regulator 2 corresponding to the branch, and outputs the rated test current corresponding to the branch of the test product to the large-current transformer 3 of each branch;
and step 9: repeating the step 6 to the step 8, simultaneously measuring the temperature rise value of the test sample in real time by the control system 1 through the temperature sensor, and finishing the test when the temperature rise is stable; the control system 1 records the temperature rise value as the final test result;
step 10: after the test is finished, the control system 1 controls the automatic short-circuit device 5 to act, a motor in the automatic short-circuit device 5 rotates to drive the bus copper bar to move, and three wire outlet terminals of the automatic short-circuit device 5 are disconnected with the bus copper bar; meanwhile, the voltage regulator 2 and the large-current transformer 3 are regulated to enable the output of the voltage regulator and the large-current transformer to return to zero, and the contactor 6 is controlled to be disconnected.
Claims (4)
1. The utility model provides a be used for many branches looped netowrk cabinet once to connect and accomplish temperature rise test device simultaneously, installs on the sample, its characterized in that: the device comprises a control system (1), a voltage regulator (2), a high-current transformer (3), a current transformer (4), an automatic short-circuit device (5) and a contactor (6);
a temperature sensor is arranged at the position of the test article; the wire inlet side of the test article is connected with an automatic short-circuit device (5); each branch circuit on the outgoing line side of the test article is provided with a contactor (6) for controlling the on-off state; each branch comprises three phases, and each phase is provided with a large-current transformer (3), a current transformer (4) and a voltage regulator (2);
the temperature sensor and the current transformer (4) are connected with a signal input end of the control system (1), and a signal output end of the control system (1) is connected with the voltage regulator (2), the contactor (6) and the automatic short-circuit device (5).
2. The device for simultaneously completing temperature rise test for the multi-branch ring main unit through one-time wiring according to claim 1, wherein: and three external terminals of the automatic short-circuit device (5) are respectively connected with three phases of the test article inlet wire branch circuit to short-circuit the test article inlet wire end.
3. The device for simultaneously completing temperature rise test for the multi-branch ring main unit through one-time wiring according to claim 1, wherein: the side circuit of the outgoing line of the test article is connected with a large current transformer (3), a current transformer (4), a contactor (6) and a voltage regulator (2) in sequence.
4. A method for performing a temperature rise test on a multi-branch ring main unit by using the testing device of any one of claims 1 to 3, wherein the method comprises the following steps:
step 1: setting used branches according to the number of the branches of the ring main unit; setting a rated test current value of each branch circuit by combining name plate parameters of the ring main unit;
step 2: three-phase outlet terminals on the automatic short-circuit device (5) are respectively connected with each of the test article inlet branch circuits, and the heavy-current transformer (3) is connected with the outlet branch circuit corresponding to the test article;
and step 3: attaching a temperature sensor of the control system (1) to each branch of the test sample, and detecting the temperature of the branch in real time;
and 4, step 4: starting an instrument, controlling an automatic short-circuit device (5) to act by a control system (1), driving a bus copper bar to move by rotating a motor in the automatic short-circuit device (5), and after the bus copper bar moves in place, connecting 3 wire outgoing terminals of the automatic short-circuit device (5) to the bus copper bar so as to short-circuit three-phase wire incoming terminals of a test sample;
step 5, the control system (1) automatically controls the contactors (6) of the corresponding branches to suck through P L C according to the number of the test sample branches, so that the corresponding branches are conducted;
step 6: the control system (1) adjusts the voltage regulator (2) on each branch, and outputs the rated test current corresponding to the branch of the test product to the high-current transformer (3) of each branch;
and 7: the current transformer (4) measures the actual flowing current value of each branch of the test sample, and the measurement result is transmitted to the control system (1);
and 8: the control system (1) judges whether the test current value flowing through each branch of the test article is a rated test current value or not according to the measurement result of the mutual inductor 4 in real time;
if the current value is not the rated current value, the control system (1) automatically adjusts the voltage regulator (2) corresponding to the branch, and the high-current transformer (3) of each branch outputs the rated test current corresponding to the branch of the test product;
and step 9: repeating the step 6 to the step 8, simultaneously measuring the temperature rise value of the test sample in real time by the control system (1) through the temperature sensor, and finishing the test when the temperature rise is stable; the control system (1) records the temperature rise value as the final test result;
step 10: after the test is finished, the control system (1) controls the automatic short-circuit device (5) to act, a motor in the automatic short-circuit device (5) rotates to drive the bus copper bar to move, and three wire outlet terminals of the automatic short-circuit device (5) are disconnected with the bus copper bar; and meanwhile, the voltage regulator (2) and the large-current transformer (3) are regulated to enable the output to return to zero, and the contactor (6) is controlled to be disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010412495.4A CN111504507A (en) | 2020-05-15 | 2020-05-15 | Device and method for completing temperature rise test of multi-branch ring main unit by one-time wiring |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010412495.4A CN111504507A (en) | 2020-05-15 | 2020-05-15 | Device and method for completing temperature rise test of multi-branch ring main unit by one-time wiring |
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| CN111504507A true CN111504507A (en) | 2020-08-07 |
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| CN202010412495.4A Pending CN111504507A (en) | 2020-05-15 | 2020-05-15 | Device and method for completing temperature rise test of multi-branch ring main unit by one-time wiring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113533911A (en) * | 2021-06-11 | 2021-10-22 | 中国电力科学研究院有限公司 | Experimental device and testing method for high-voltage bushing insulation test and temperature detection |
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| US6489693B1 (en) * | 1999-02-15 | 2002-12-03 | Isabellenhutte Heusler Gmbh Kg | Method and device for current monitoring in a current supply system |
| WO2013042552A1 (en) * | 2011-09-22 | 2013-03-28 | Ntn株式会社 | Roller bearing device |
| CN103995210A (en) * | 2014-04-15 | 2014-08-20 | 刘骐畅 | Monitoring system and method suitable for underground cable distribution system |
| CN104065076A (en) * | 2014-07-15 | 2014-09-24 | 浙江方圆电气设备检测有限公司 | Temperature rise test reverse power supply system |
| CN104849655A (en) * | 2015-04-10 | 2015-08-19 | 国家电网公司 | Heavy current testing device and method for extra-high voltage deicing isolating switch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113533911A (en) * | 2021-06-11 | 2021-10-22 | 中国电力科学研究院有限公司 | Experimental device and testing method for high-voltage bushing insulation test and temperature detection |
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Application publication date: 20200807 |