CN202159123U - Portable detection instrument of characteristics of direct-current circuit breaker - Google Patents

Portable detection instrument of characteristics of direct-current circuit breaker Download PDF

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Publication number
CN202159123U
CN202159123U CN2011202595009U CN201120259500U CN202159123U CN 202159123 U CN202159123 U CN 202159123U CN 2011202595009 U CN2011202595009 U CN 2011202595009U CN 201120259500 U CN201120259500 U CN 201120259500U CN 202159123 U CN202159123 U CN 202159123U
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CN
China
Prior art keywords
contactor
circuit breaker
portable
load
pulse
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Expired - Lifetime
Application number
CN2011202595009U
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Chinese (zh)
Inventor
赵应春
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Original Assignee
CHONGQING ELECTRIC POWER Corp MAINTENANCE BRANCH
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Priority to CN2011202595009U priority Critical patent/CN202159123U/en
Application granted granted Critical
Publication of CN202159123U publication Critical patent/CN202159123U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a portable detection instrument of characteristics of a direct-current circuit breaker, which comprises a constant current source, a load, a first contactor, a second contactor, a detection terminal, an impulse width control system and a programmable logic controller (PLC) control system. The load and the first contactor are serially connected and connected with two ends of the large-power constant current resource, one end of the second contactor is connected with a shared terminal point of connection of the load and the first contactor, the other end of the second contactor is connected with one end of the detection terminal, and the other end of the first contactor is connected with the other end of the detection terminal. A high-accuracy test power supply and microprocessor control are adopted, accurate detection of a mechanical tripping characteristic and an ampere-second characteristic of the direct-current circuit breaker can be performed under a prescribed condition, and shortcomings and danger caused by adopting a method of estimating short-circuit current for stage difference coordination at home are eliminated. The microprocessor control technology is adopted to perform high-accuracy tests on current and break time of the circuit breaker. The detection instrument is small in volume, light and portable.

Description

Portable DC circuit breaker characteristic tester
Technical field
The utility model relates to the on-the-spot differential compatibility test instrument of a kind of dc circuit breaker, particularly a kind of Portable DC circuit breaker characteristic testing tool that is applicable to the transforming plant DC electric power loop.
Background technology
At present, the distribution of electric system DC feedback net adopts dc circuit breaker as protection electrical equipment.Because the superior and the subordinate's dc circuit breaker protection acting characteristic does not match; In the straight-flow system operational process; When short trouble appears in subordinate's consumer; Often draw the overstep tripping of straight upper level dc circuit breaker, thereby cause the loss of power accident of other feeder line, and then cause the accident of transforming plant primary equipment such as high-voltage switch gear, transformer, capacitor etc.This type of accident takes place a lot of at home and abroad, the safe and stable operation of serious threat electrical network.Therefore, State Grid Corporation of China has stipulated to carry out the ampere-time characteristic test for new clothes and operating direct current protecting isolating switch, and guaranteed performance conforms to design, to guarantee the correctness of the differential cooperation of DC loop.
" DC power system operations specification " the 8th section of the 12 article regulation of promulgation in 2005 " dc fuse and air-break should adopt up-to-standard product; its fusing is stopped or definite value should and be adjusted by the relevant regulations hierarchical arrangement; and regularly check, prevent because of its incorrect operation expansion accident "; " DC power system technical supervision regulation " the 27 regulation: " ... before using, automatic air circuit breaker should carry out the selective examination of characteristic and action current.... " Regulation in " prevention DC power system accident measure " the 11: " ... should carry out ampere-time characteristic and action current before using and spot-check ... "So the dc circuit breaker in the system is done frequent, strict, parameter testing accurately, particularly ampere-time characteristic is done quantitative test and the interpolar compatibility test is very important.
Domestic existing DC interruption ampere-time characteristic tester mainly adopts accumulator or controllable silicon as experiment power supply, adopts accumulator to do experiment; Though low price owing to have the maintenance and the natural life-span of accumulator, makes the maintainability variation of equipment itself; Especially whether battery is full of, whether wear out influences the stable of measuring current with direct current; And the test continuation of isolating switch overload characteristics is very poor, and precision of steady current is less than or equal to 2, can't satisfy test request.
For the on-the-spot differential compatibility test of dc circuit breaker, still there are not similar test apparatus and method both at home and abroad, in the past for the differential cooperation of DC interruption, the main method of estimation short-circuit current that adopts is carried out.But field practice finds that often there is bigger gap in the estimation short-circuit current with actual short-circuit current, causes the differential of the superior and the subordinate's dc circuit breaker effectively not cooperate, and causes serious potential safety hazard.Therefore experimental technique, instrument and the method for studying novel differential cooperation have very strong realistic meaning
Therefore need a kind of on-the-spot differential cooperation testing tool that adopts high precision experiment power supply and microprocessor control.
The utility model content
In view of this, the utility model technical matters to be solved provides so need a kind ofly adopt the on-the-spot differential cooperation testing tool of high precision experiment power supply and microprocessor control.
The utility model is realized through following technical scheme:
The Portable DC circuit breaker characteristic tester that the utility model provides; Comprise constant current source, load, first contactor, second contactor and detection terminal; Be connected on the two ends of high power constant-current source after said load, the series connection of first contactor; Said second contactor one terminates at the common end points that load is connected with first contactor, and the other end of said second contactor is connected with an end of detection terminal, and the other end of said first contactor is connected with the other end of detection terminal.
Further; Said constant current source comprises accumulator, pulse-width controlled system, IGBT power tube T1, resonant inductance L2, discharge resistance RL, resonant capacitance C1, afterflow diode D1 and afterflow inductance L 1; Said pulse-width controlled system is provided with control port, output port, first input end mouth, the second voltage input end mouth and the second current input terminal mouth; The discharge current of said accumulator from battery positive voltage through IGBT power tube T1, resonant inductance L2 to the negative pole of afterflow diode D1 and the positive pole of resonant capacitance C1; Then; RL gets back to battery terminal negative through discharge resistance; Between sustained diode 1 negative pole and resonant capacitance C1, be connected in series afterflow inductance L 1, the discharge current signal is introduced second transmission of electricity of pulse-width controlled system from battery positive voltage and is flowed into port, and the discharge resistance terminal voltage signal is from the anodal pulse-width controlled system second voltage input end mouth of introducing of discharge resistance; Resonant inductance L2 terminal voltage signal is introduced pulse-width controlled system first input end mouth, the external IGBT power tube of the control port of pulse-width controlled system T1 from resonant inductance L2;
Further, said constant current source also comprises the PLC control system, and said PLC control system is used to control operation and the data storage and the processing of pre-set programs, and said PLC control system is connected with the output port of pulse-width controlled system;
Further, two of said detection terminal connection jaws are respectively arranged with the binding clip that is used to connect UUT;
Further, also comprise LCD display, said LCD display is connected with the PLC control system and is used to the data message that shows that test produces;
Further, also comprise the data export interface, said data export interface is connected with the PLC control system and is used to derive the data that test is obtained;
Further, said constant current source is a high power constant-current source;
Further, said load is high-power aluminium alloy load.
The beneficial effect of the utility model is: the utility model adopts high precision experiment power supply and microprocessor control; This instrument can (overload characteristics, short circuit curve, temperature, measuring current etc.) be tested the mechanical tripping characteristic and the ampere-time characteristic of dc circuit breaker under rated condition accurately, overcomes domestic in the past shortcoming and the potential safety hazard that adopts estimation short-circuit current method to be brought to differential cooperation; The utility model adopts experiment power supply constant current control technology can realize DC experiment electric current step-less adjustment in 0~500A scope; Adopt the microprocessor control technology, to the high precision measurement that carries out of circuit breaker current and break, minimum time resolution 0.1ms; Adopt color page LCD panel to show, clear, directly perceived.Operating system is full Chinese interface, and man-machine interface is friendly, and menu operation is easy to learn; Realize automatic collecting test data, generate test report, list family curve and printing, can test data be imported computing machine simultaneously, thereby greatly reduce field maintemance personnel's labour intensity, improved efficient; Have the various faults defencive function,, guarantee on-the-spot short-circuit test safety, reliable, accurate in conjunction with the on-the-spot test experience of enriching of direct current administrative center; The reliable and stable strong interference immunity of control system, tester is equipped with the binding clip easy-to-connect, and volume is little, in light weight, be easy to carry.
Other advantages, target and the characteristic of the utility model will be set forth in instructions subsequently to a certain extent; And to a certain extent; Based on being conspicuous to those skilled in the art, perhaps can from the practice of the utility model, obtain instruction to investigating of hereinafter.The target of the utility model and other advantages can realize and obtain through following instructions and claims.
Description of drawings
For the purpose, technical scheme and the advantage that make the utility model is clearer, will combine accompanying drawing that the utility model is done further to describe in detail below, wherein:
Fig. 1 is the main circuit schematic diagram;
Fig. 2 is the high power constant-current source schematic diagram.
Among the figure, 1 is that constant current source, 2 is that first contactor, 3 is that load, 4 is that second contactor, 5 is detection terminal.
Embodiment
Below will be with reference to accompanying drawing, the preferred embodiment of the utility model is carried out detailed description.Should be appreciated that preferred embodiment has been merely explanation the utility model, rather than in order to limit the protection domain of the utility model.
Fig. 1 is the main circuit schematic diagram; As shown in the figure: the Portable DC circuit breaker characteristic tester that the utility model provides; Comprise constant current source, load, first contactor, second contactor and detection terminal; Be connected on the two ends of high power constant-current source after said load, the series connection of first contactor; Said second contactor one terminates at the common end points that load is connected with first contactor, and the other end of said second contactor is connected with an end of detection terminal, and the other end of said first contactor is connected with the other end of detection terminal.
Fig. 2 is the high power constant-current source schematic diagram; As shown in the figure: as the further improvement of the foregoing description; Said constant current source comprises accumulator, pulse-width controlled system, IGBT power tube T1, resonant inductance L2, discharge resistance RL, resonant capacitance C1, afterflow diode D1 and afterflow inductance L 1; Said pulse-width controlled system is provided with control port, output port, first input end mouth, the second voltage input end mouth and the second current input terminal mouth; The discharge current of said accumulator from battery positive voltage through IGBT power tube T1, resonant inductance L2 to the negative pole of afterflow diode D1 and the positive pole of resonant capacitance C1; Then, RL gets back to battery terminal negative through discharge resistance, between sustained diode 1 negative pole and resonant capacitance C1, is connected in series afterflow inductance L 1; The discharge current signal is introduced second transmission of electricity of pulse-width controlled system from battery positive voltage and is flowed into port; The discharge resistance terminal voltage signal is from the anodal pulse-width controlled system second voltage input end mouth of introducing of discharge resistance, and resonant inductance L2 terminal voltage signal is introduced pulse-width controlled system first input end mouth, the external IGBT power tube of the control port of pulse-width controlled system T1 from resonant inductance L2.
Further improvement as the foregoing description; Said constant current source also comprises the PLC control system; Said PLC control system is used to control operation and the data storage and the processing of pre-set programs; Said PLC control system is connected with the output port of pulse-width controlled system, and the PLC control system of the utility model adopts Siemens technical grade PLC controller.
As the further improvement of the foregoing description, two connection jaws of said detection terminal are respectively arranged with the binding clip that is used to connect UUT.Use is that isolating switch to be measured is reliably inserted detection terminal, makes the positive termination circuit breaker current of indicating of detection terminal flow into end, makes the negative termination circuit breaker current outflow end of indicating of detection terminal.
Further improvement as the foregoing description also comprises LCD display, and said LCD display is connected with the PLC control system and is used to the data message that shows that test produces; The utility model adopts 7 〞 RGB touch-screens to be used as display, and is simple, convenient.
Further improvement as the foregoing description also comprises the data export interface, and said data export interface is connected with the PLC control system and is used to derive the data that test is obtained, and the data export interface of the utility model adopts USB2.0 output.
As the further improvement of the foregoing description, said constant current source is a high power constant-current source; The utility model adopts the high frequency constant-current stabilizer.
As the further improvement of the foregoing description, said load is high-power aluminium alloy load.
The use of the Portable DC circuit breaker characteristic tester that the utility model provides comprises following step:
(1) properly connects protective earth;
(2) press device power supply (DPS) confirmation request three-phase alternating current 380V (± 15%), connect power supply;
(3) isolating switch to be measured is reliably inserted detection terminal;
(4) energized is operated according to screen displaying software operation interface; Set each parameter;
(5) isolating switch to be measured that closes makes it be in on-state;
(6) system validation circuit-breaker status to be measured, measuring current, treat circuit breaker tripping after, operation again after the isolating switch cooling;
(7) test data is checked and is derived.
Explanation is at last; Above embodiment is only unrestricted in order to the technical scheme of explanation the utility model; Although the preferred embodiment through with reference to the utility model is described the utility model; But those of ordinary skill in the art should be appreciated that and can make various changes to it in form with on the details, and the spirit and the scope of the utility model that does not depart from appended claims and limited.

Claims (8)

1. Portable DC circuit breaker characteristic tester; It is characterized in that: comprise constant current source, load, first contactor, second contactor and detection terminal; Be connected on the two ends of high power constant-current source after said load, the series connection of first contactor; Said second contactor one terminates at the common end points that load is connected with first contactor, and the other end of said second contactor is connected with an end of detection terminal, and the other end of said first contactor is connected with the other end of detection terminal.
2. Portable DC circuit breaker characteristic tester according to claim 1; It is characterized in that: said constant current source comprises accumulator, pulse-width controlled system, IGBT power tube T1, resonant inductance L2, discharge resistance RL, resonant capacitance C1, afterflow diode D1 and afterflow inductance L 1; Said pulse-width controlled system is provided with control port, output port, first input end mouth, the second voltage input end mouth and the second current input terminal mouth; The discharge current of said accumulator from battery positive voltage through IGBT power tube T1, resonant inductance L2 to the negative pole of afterflow diode D1 and the positive pole of resonant capacitance C1; Then; RL gets back to battery terminal negative through discharge resistance; Between sustained diode 1 negative pole and resonant capacitance C1, be connected in series afterflow inductance L 1, the discharge current signal is introduced second transmission of electricity of pulse-width controlled system from battery positive voltage and is flowed into port, and the discharge resistance terminal voltage signal is from the anodal pulse-width controlled system second voltage input end mouth of introducing of discharge resistance; Resonant inductance L2 terminal voltage signal is introduced pulse-width controlled system first input end mouth, the external IGBT power tube of the control port of pulse-width controlled system T1 from resonant inductance L2.
3. Portable DC circuit breaker characteristic tester according to claim 2; It is characterized in that: said constant current source also comprises the PLC control system; Said PLC control system is used to control operation and the data storage and the processing of pre-set programs, and said PLC control system is connected with the output port of pulse-width controlled system.
4. Portable DC circuit breaker characteristic tester according to claim 3 is characterized in that: two connection jaws of said detection terminal are respectively arranged with the binding clip that is used to connect UUT.
5. Portable DC circuit breaker characteristic tester according to claim 4 is characterized in that: also comprise LCD display, said LCD display is connected with the PLC control system and is used to the data message that shows that test produces.
6. Portable DC circuit breaker characteristic tester according to claim 5 is characterized in that: also comprise the data export interface, said data export interface is connected with the PLC control system and is used to derive the data that test is obtained.
7. Portable DC circuit breaker characteristic tester according to claim 6 is characterized in that: said constant current source is a high power constant-current source.
8. Portable DC circuit breaker characteristic tester according to claim 7 is characterized in that: said load is high-power aluminium alloy load.
CN2011202595009U 2011-07-21 2011-07-21 Portable detection instrument of characteristics of direct-current circuit breaker Expired - Lifetime CN202159123U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011202595009U CN202159123U (en) 2011-07-21 2011-07-21 Portable detection instrument of characteristics of direct-current circuit breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011202595009U CN202159123U (en) 2011-07-21 2011-07-21 Portable detection instrument of characteristics of direct-current circuit breaker

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Publication Number Publication Date
CN202159123U true CN202159123U (en) 2012-03-07

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102636683A (en) * 2012-05-11 2012-08-15 河北省电力建设调整试验所 Test device and method for short-circuit current of direct-current power supply system based on low-current burst power
CN102944838A (en) * 2012-12-06 2013-02-27 法泰电器(江苏)股份有限公司 Ampere-second feature test device for direct current breaker
CN104122500A (en) * 2014-07-18 2014-10-29 国家电网公司 Air switch stage difference coordination test device and test method
CN108627710A (en) * 2017-03-15 2018-10-09 深圳市奇辉电气有限公司 A kind of detection method and its system of electrical equipment acting characteristic

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102636683A (en) * 2012-05-11 2012-08-15 河北省电力建设调整试验所 Test device and method for short-circuit current of direct-current power supply system based on low-current burst power
CN102636683B (en) * 2012-05-11 2015-05-27 河北省电力建设调整试验所 Test device and method for short-circuit current of direct-current power supply system based on low-current burst power
CN102944838A (en) * 2012-12-06 2013-02-27 法泰电器(江苏)股份有限公司 Ampere-second feature test device for direct current breaker
CN102944838B (en) * 2012-12-06 2015-03-25 法泰电器(江苏)股份有限公司 Ampere-second feature test device for direct current breaker
CN104122500A (en) * 2014-07-18 2014-10-29 国家电网公司 Air switch stage difference coordination test device and test method
CN108627710A (en) * 2017-03-15 2018-10-09 深圳市奇辉电气有限公司 A kind of detection method and its system of electrical equipment acting characteristic
CN108627710B (en) * 2017-03-15 2021-10-01 深圳市奇辉电气有限公司 Method and system for detecting motion characteristics of electrical equipment

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
ASS Succession or assignment of patent right

Owner name: STATE ELECTRIC NET CROP.

Effective date: 20120919

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20120919

Address after: 400039 No. 92 Torch Road, Erlang hi tech Zone, Chongqing hi tech Development Zone

Patentee after: Chongqing Electric Power Corporation Maintenance Branch

Patentee after: State Grid Corporation of China

Address before: 400039 No. 92 Torch Road, Erlang hi tech Zone, Chongqing hi tech Development Zone

Patentee before: Chongqing Electric Power Corporation Maintenance Branch

CX01 Expiry of patent term

Granted publication date: 20120307

CX01 Expiry of patent term