CN105068034A - Current transformer detection system and method - Google Patents
Current transformer detection system and method Download PDFInfo
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- CN105068034A CN105068034A CN201510510549.XA CN201510510549A CN105068034A CN 105068034 A CN105068034 A CN 105068034A CN 201510510549 A CN201510510549 A CN 201510510549A CN 105068034 A CN105068034 A CN 105068034A
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- 238000001514 detection method Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000012360 testing method Methods 0.000 claims description 29
- 238000005070 sampling Methods 0.000 claims description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 12
- 229910052710 silicon Inorganic materials 0.000 claims description 12
- 239000010703 silicon Substances 0.000 claims description 12
- 230000001174 ascending effect Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Abstract
The invention provides a current transformer detection system and method. The system comprises a lifting device disposed on the upper surface of a power cabinet, and a U-shaped holding clamp fixed at an end part of the lifting device. A side surface of the U-shaped holding clamp is provided with a radar distance-measuring sensor. The interior of the power cabinet is provided with a control device, and the radar distance-measuring sensor is electrically connected with the control device. The lifting device consists of a plurality of hydraulic rods. The control device comprises an upper computer, a lower computer, a large-current output module connected with the upper computer, and a hydraulic movement module which is connected with the lower computer. The large-current output module comprises an electronic voltage regulator, a high-frequency filter, and a current increasing device. Through one-key control, the device completes the high-altitude wire connection or disconnection, replaces an original combination of a high-altitude wiring clamp and a large-current generator, can complete the one-time connection and point polarity operation of the current transformer, works in a mode of a working vehicle, reduces the labor intensity of a worker, and improves the work efficiency.
Description
Technical field
The present invention relates to current detection technology field, be specifically related to a kind of current transformer detection system and detection method thereof.
Background technology
Electrical installation project in generating plant and transformer substation construction engineering comprises once, the installation of secondary device, when wiring is complete for a large amount of secondary AC loop in full station, and need by the integrality in once through-flow inspection secondary current loop.At present, used is once made up of with expansion link two part extended testing clamp hand with flow detection device, undertaken that high-altitude is carried out to electrical equipment by overhead jointing clamp and connect electric test, in use, first testing clamp hand handle and expansion link are connected to tighten by screw thread and make it integralization, connect every root control lever according to the reminding method on bar; Operative employee directly operates on ground, lifts mounted high-altitude test clamp upper jaw and hooks measured object, after be connected to high-current generation device CT tested.Adopt said apparatus to there is following shortcoming: the first, high-altitude easily swings, and easily touches adjacent spaces, and jaw poor reliability easily comes off simultaneously; The second, lift mounted high-altitude test clamp overall weight large, higher to staff's force requirements.Three, testing process is loaded down with trivial details, detects inaccurate to current transformer.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of current transformer detection system and detection method thereof, current transformer once through-flow and point-polarity work with the operation of work car form can be completed, its testing process is simple and convenient, reduce intensity of workers, improve the accuracy of work efficiency and detection.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of current transformer detection system, comprise the lifting device being arranged on power cabinet upper side and the U-shaped being fixed on lifting device end embraces folder, the side that described U-shaped embraces folder is provided with radar range finding sensor, the inside of described power cabinet is provided with control device, described radar range finding sensor is electrically connected with control device, described lifting device is multisection hydraulic bar composition, and described control device comprises host computer, slave computer, High-current output module and hydraulic motion module; Described High-current output module comprises electronic pressure controller, high frequency filter and current lifting device, the input end of described electronic pressure controller is connected with AC power through air switch, its output terminal is connected with the input end of current lifting device through high frequency filter, described host computer is connected with the input end of electronic pressure controller by the first PWM module, and the output terminal of described current lifting device is connected with host computer through the first current sampling unit; Described hydraulic motion module comprises the second PWM module, silicon controlled component, the second current sampling unit, force samples unit, radar test unit and control module; The input end of described second PWM module is connected with slave computer, its output terminal is connected with AC power through Group of Silicon Controlled Rectifier, air switch successively, the output terminal of described second current sampling unit is connected with slave computer, its input end is connected with hydraulic pump, the output terminal of described control module is connected with slave computer through force samples unit, the output terminal of control module is connected with auxiliary element through multisection hydraulic bar interface, the output terminal of described radar range finding unit is connected with host computer, and the output terminal of described Group of Silicon Controlled Rectifier is connected with the input end of hydraulic pump; Data after process for measuring the distance of embracing between folder distance current transformer lead-in wire, and are sent in host computer and slave computer by described radar test unit.
Further, described control device also comprise be connected with host computer display module, wireless module, multi input end, point-polarity control module and embrace press from both sides control module.
Further, described point-polarity control module comprises triode K1 and K2, the collector of described triode K1 with K2 is all connected with power supply, its base stage is respectively by resistance R2, resistance R5 is connected with the output terminal of host computer, the emitter of triode K1 and K2 is respectively through resistance R3, resistance R6 ground connection, the base stage of three collector K1 is connected with its collector through resistance R1, the base stage of triode K2 is connected with its collector through resistance R4, the two ends of described resistance R3 and R4 are parallel with electric capacity C1 and electric capacity C2 respectively, the emitter of described triode K1 with K2 is connected and draws wiring as test terminals one, the earth terminal of described resistance R3 is connected with the earth terminal of resistance R6 by hummer HA, and the node between resistance R3 and hummer HA draws wiring as testing terminals two.
A detection method for current transformer detection system, comprises the steps:
(1) host computer and slave computer read radar range finding cell data information, and are shown by display screen;
(2) slave computer gathers hydraulic pump current information, and calculate multisection hydraulic bar ascending velocity and time, Group of Silicon Controlled Rectifier Converting Unit conducting and shutoff is controlled by PWM module, variable frequency control is carried out to hydraulic pump simultaneously, complete the closed-loop control that multisection hydraulic bar rises, until multisection hydraulic bar arrives current transformer wire locations;
(3) multi input end input top is embraced folder and is picked up signal to host computer, embraces folder complete and pick up action by PC control;
(4) whether contacted well by the test wiring of point-polarity control module detection current transformer, if contact well sends prompt tone, and shown by display module;
(5) control signal of wireless module acceptance point Polarity Control unit, and this control signal is uploaded to host computer, point-polarity control module output short-time pulse voltage is linked into current transformer primary side simultaneously and namely produces short-time pulse electric current, determine current transformer polarity at Current Transformer Secondary side cut cable by multimeter pointer offset direction;
(6) test terminals one to be connected with the side of current transformer by embracing folder, test terminals two-way earthing switch blade, switch are connected with the opposite side of current transformer, host computer reads the numerical value of the first current sampling unit and the first voltage sampling unit and carries out analytical calculation, observe secondary device up-sampling information, wiring is correct, whether current transformer ratio is correct to determine whole system electric current secondary loop simultaneously.
The invention has the beneficial effects as follows: the present invention completes high-altitude wiring or off-line by one-touch control, substitute original overhead jointing clamp strong current generator, current transformer can be completed once through-flow with point-polarity work and with the operation of work car form, reduce intensity of workers, increase work efficiency.
Accompanying drawing explanation
Fig. 1 is installation drawing of the present invention;
Fig. 2 is system chart of the present invention;
Fig. 3 is the circuit diagram of point-polarity control module of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, a kind of current transformer detection system, comprise the lifting device 32 being arranged on power cabinet 33 upper side and the U-shaped being fixed on lifting device end embraces folder 31, the side that this U-shaped embraces folder 31 is provided with radar range finding sensor 34, the inside of power cabinet 33 is provided with control device, this radar range finding sensor 34 is electrically connected with control device by cable, and described lifting device 32 is multisection hydraulic bar composition.In use, power cabinet 2 is shifted onto the below of tested current transformer, p-wire is connected with the primary side of current transformer by switch, embrace the secondary side that folder 31 is connected to current transformer, namely complete the installation of the front equipment of test.
As shown in Figure 2, control device comprises host computer 1, slave computer 2, High-current output module and hydraulic motion module, and this host computer 1 and slave computer 2 are MCU microcontroller, described High-current output module comprises electronic pressure controller 4, high frequency filter 5 and current lifting device 6, the input end of this electronic pressure controller 4 is connected with AC power through air switch 3, its output terminal is connected through the input end of high frequency filter 5 with current lifting device 6, described host computer 1 is connected with the input end of electronic pressure controller 4 by the first PWM module 9, and the output terminal of described current lifting device 6 is connected with host computer 1 through the first current sampling unit 7, described hydraulic motion module comprises the second PWM module 10, silicon controlled component 11, second current sampling unit 15, force samples unit 23, radar test unit 18 and control module 17, the input end of described second PWM module 10 is connected with slave computer 2, its output terminal is successively through silicon controlled component 11, air switch 12 is connected with AC power, the output terminal of described second current sampling unit 15 is connected with slave computer 2, its input end is connected with hydraulic pump 14, the output terminal of described control module 17 is connected with slave computer 2 through force samples unit 23, the output terminal of control module 17 is connected with auxiliary element 13 through multisection hydraulic bar interface, the output terminal of described radar range finding unit 18 is connected with host computer 1, the output terminal of described silicon controlled component 11 is connected with the input end of hydraulic pump 14, described radar test unit 18, embraces folder 31 apart from the distance between current transformer lead-in wire for measuring U-shaped, and the data after process is sent in host computer 1 and slave computer 2.
As shown in Figures 2 and 3, control device also comprise be connected with host computer display module 24, wireless module 21, multi input end 22, point-polarity control module 20 and embrace press from both sides control module 19.This point-polarity control module 20 comprises triode K1 and K2, the collector of triode K1 is all connected with power supply, its base stage is connected with the output terminal of host computer 1 by resistance R2, and the emitter of triode K1 is through resistance R3 ground connection, and the base stage of three collector K1 is connected with its collector through resistance R1; The collector of triode K2 is all connected with power supply, its base stage is connected with the output terminal of host computer 1 by resistance R5, the emitter of triode K2 is through resistance R6 ground connection, and the base stage of three collector K2 is connected with its collector through resistance R4, and the two ends of resistance R3 and R4 are parallel with electric capacity C1 and electric capacity C2 respectively; The emitter of triode K1 with K2 is connected and draws wiring as the test terminals one for measurement current transform er, and the earth terminal of described resistance R3 to be connected with the earth terminal of resistance R6 by hummer HA and node between resistance R3 and hummer HA draws wiring as testing terminals two.
A detection method for current transformer detection system, comprises the steps:
S1: host computer 1 and slave computer 2 read the data message of radar range finding unit 18, and are shown by display screen;
S2: slave computer 2 gathers the current information of hydraulic pump 14, and calculate multisection hydraulic bar ascending velocity and time, the conducting of Group of Silicon Controlled Rectifier Converting Unit and shutoff is controlled by PWM module 10, variable frequency control is carried out to hydraulic pump 14, complete the closed-loop control that multisection hydraulic bar rises, until multisection hydraulic bar arrives current transformer wire locations;
S3: multi input end 22 inputs top and embraces folder 31 and pick up signal to host computer 1, controls to embrace a folder 31 by host computer 1 and completes and picking up action;
S4: whether the test wiring being detected current transformer by point-polarity control module 20 is contacted well, if contact well sends prompt tone, is uploaded to host computer 1, and is shown by display screen by result;
S5: the control signal of wireless module 21 acceptance point Polarity Control unit 20, and this control signal is uploaded to host computer 1, the output short-time pulse voltage of point-polarity control module 20 is linked into current transformer primary side simultaneously and namely produces short-time pulse electric current, determine current transformer polarity at Current Transformer Secondary side cut cable by multimeter pointer offset direction;
S6: test terminals one are connected with the side of current transformer by embracing folder 31, test terminals two-way earthing switch blade 4, switch are connected with the opposite side of current transformer, host computer 1 reads the numerical value of the first current sampling unit 7 and the first voltage sampling unit 8 and carries out analytical calculation, observe secondary device up-sampling information, wiring is correct, whether current transformer ratio is correct to determine whole system electric current secondary loop simultaneously.
Those skilled in the art will be appreciated that; above embodiment is only used to the present invention is described; and be not used as limitation of the invention; as long as within spirit of the present invention, the suitable change do above embodiment and change all drop within the scope of protection of present invention.
Claims (4)
1. a current transformer detection system, comprise the lifting device being arranged on power cabinet upper side and the U-shaped being fixed on lifting device end embraces folder, the side that described U-shaped embraces folder is provided with radar range finding sensor, the inside of described power cabinet is provided with control device, described radar range finding sensor is electrically connected with control device, described lifting device is multisection hydraulic bar composition, it is characterized in that: described control device comprises host computer, slave computer, High-current output module and hydraulic motion module; Described High-current output module comprises electronic pressure controller, high frequency filter and current lifting device, the input end of described electronic pressure controller is connected with AC power through air switch, its output terminal is connected with the input end of current lifting device through high frequency filter, described host computer is connected with the input end of electronic pressure controller by the first PWM module, and the output terminal of described current lifting device is connected with host computer through the first current sampling unit; Described hydraulic motion module comprises the second PWM module, silicon controlled component, the second current sampling unit, force samples unit, radar test unit and control module; The input end of described second PWM module is connected with slave computer, its output terminal is connected with AC power through Group of Silicon Controlled Rectifier, air switch successively, the output terminal of described second current sampling unit is connected with slave computer, its input end is connected with hydraulic pump, the output terminal of described control module is connected with slave computer through force samples unit, the output terminal of control module is connected with auxiliary element through multisection hydraulic bar interface, the output terminal of described radar range finding unit is connected with host computer, and the output terminal of described Group of Silicon Controlled Rectifier is connected with the input end of hydraulic pump; Data after process for measuring the distance of embracing between folder distance current transformer lead-in wire, and are sent in host computer and slave computer by described radar test unit.
2. a kind of current transformer detection system according to claim 1, is characterized in that: described control device also comprise be connected with host computer display module, wireless module, multi input end, point-polarity control module and embrace press from both sides control module.
3. a kind of current transformer detection system according to claim 2, it is characterized in that: described point-polarity control module comprises triode K1 and K2, the collector of described triode K1 with K2 is all connected with power supply, its base stage is respectively by resistance R2, resistance R5 is connected with the output terminal of host computer, the emitter of triode K1 and K2 is respectively through resistance R3, resistance R6 ground connection, the base stage of three collector K1 is connected with its collector through resistance R1, the base stage of triode K2 is connected with its collector through resistance R4, the two ends of described resistance R3 and R4 are parallel with electric capacity C1 and electric capacity C2 respectively, the emitter of described triode K1 with K2 is connected and draws wiring as test terminals one, the earth terminal of described resistance R3 is connected with the earth terminal of resistance R6 by hummer HA, and the node between resistance R3 and hummer HA draws wiring as testing terminals two.
4. a detection method for current transformer detection system, is characterized in that, comprises the steps:
(1) host computer and slave computer read radar range finding cell data information, and are shown by display screen;
(2) slave computer gathers hydraulic pump current information, and calculate multisection hydraulic bar ascending velocity and time, Group of Silicon Controlled Rectifier Converting Unit conducting and shutoff is controlled by PWM module, variable frequency control is carried out to hydraulic pump simultaneously, complete the closed-loop control that multisection hydraulic bar rises, until multisection hydraulic bar arrives current transformer wire locations;
(3) multi input end input top is embraced folder and is picked up signal to host computer, embraces folder complete and pick up action by PC control;
(4) whether contacted well by the test wiring of point-polarity control module detection current transformer, if contact well sends prompt tone, and shown by display module;
(5) control signal of wireless module acceptance point Polarity Control unit, and this control signal is uploaded to host computer, point-polarity control module output short-time pulse voltage is linked into current transformer primary side simultaneously and namely produces short-time pulse electric current, determine current transformer polarity at Current Transformer Secondary side cut cable by multimeter pointer offset direction;
(6) test terminals one to be connected with the side of current transformer by embracing folder, test terminals two-way earthing switch blade, switch are connected with the opposite side of current transformer, host computer reads the numerical value of the first current sampling unit and the first voltage sampling unit and carries out analytical calculation, observe secondary device up-sampling information, wiring is correct, whether current transformer ratio is correct to determine whole system electric current secondary loop simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510510549.XA CN105068034B (en) | 2015-08-19 | 2015-08-19 | A kind of current transformer detecting system and its detection method |
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| CN201510510549.XA CN105068034B (en) | 2015-08-19 | 2015-08-19 | A kind of current transformer detecting system and its detection method |
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| CN105068034A true CN105068034A (en) | 2015-11-18 |
| CN105068034B CN105068034B (en) | 2018-04-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106291228A (en) * | 2016-08-10 | 2017-01-04 | 国网浙江省电力公司金华供电公司 | Power transformer enclosure CT no-load voltage ratio polarity test platform |
| CN107576885A (en) * | 2017-08-23 | 2018-01-12 | 国网山东省电力公司淄博供电公司 | Device for detecting polarity for metering transformer secondary circuit |
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| JP2008134142A (en) * | 2006-11-28 | 2008-06-12 | Kansai Electric Power Co Inc:The | Inspection device and current voltage measuring device set |
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| CN107576885B (en) * | 2017-08-23 | 2020-01-07 | 国网山东省电力公司淄博供电公司 | Polarity detection device for secondary circuit of metering transformer |
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| CN105068034B (en) | 2018-04-20 |
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Inventor after: Zhang Jun Inventor after: Wang Yiyong Inventor after: Zhang Dongxian Inventor after: Yan Ting Inventor after: Wang Wei Inventor after: Mu Yunlong Inventor after: Wang Yun Inventor after: Jiao Kun Inventor after: Dai Jialin Inventor after: Gao Ran Inventor after: Jing Yao Inventor after: Zhang Zhaoyuan Inventor after: Hu Zhijia Inventor after: Shu Chang Inventor after: Wang Jian Inventor after: Zang Wei Inventor after: Peng Mingzhi Inventor after: Huang Jie Inventor after: Shao Hua Inventor after: Wu Haiyan Inventor after: Chen Qian Inventor after: Chang Wenjing Inventor before: Zhang Jun Inventor before: Zhang Dongxian Inventor before: Wang Yiyong Inventor before: Yan Ting Inventor before: Wang Wei Inventor before: Mu Yunlong |
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Address after: No. 397, Tongcheng South Road, Baohe District, Hefei City, Anhui Province 230061 Patentee after: STATE GRID ANHUI POWER SUPPLY COMPANY OVERHAUL BRANCH Patentee after: STATE GRID CORPORATION OF CHINA Address before: 230000, No.397, Tongcheng South Road, Baohe District, Hefei City, Anhui Province Patentee before: Maintenance Company Of State Grid Anhui Electric Power Company Patentee before: State Grid Corporation of China |
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Address after: No. 397, Tongcheng South Road, Baohe District, Hefei City, Anhui Province 230061 Patentee after: Super high voltage branch of State Grid Anhui Electric Power Co.,Ltd. Patentee after: STATE GRID CORPORATION OF CHINA Address before: No. 397, Tongcheng South Road, Baohe District, Hefei City, Anhui Province 230061 Patentee before: STATE GRID ANHUI POWER SUPPLY COMPANY OVERHAUL BRANCH Patentee before: STATE GRID CORPORATION OF CHINA |