CN102411124B - Mechanical property test device for special breaker - Google Patents
Mechanical property test device for special breaker Download PDFInfo
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- CN102411124B CN102411124B CN 201110219314 CN201110219314A CN102411124B CN 102411124 B CN102411124 B CN 102411124B CN 201110219314 CN201110219314 CN 201110219314 CN 201110219314 A CN201110219314 A CN 201110219314A CN 102411124 B CN102411124 B CN 102411124B
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Abstract
The invention discloses a mechanical property test device for a special breaker. The test device comprises the structure as follows: a test current source and a current sensor are sequentially connected with each other; a constant-current source and a break voltage sensor are sequentially connected with each other; the current sensor and the break voltage sensor are respectively connected with a multi-channel data modulation circuit; the multi-channel data modulation circuit and a multi-channel A/D (Analog to Digital) converter are sequentially connected with each other and then are connectedwith a field programmable gate array; a speed sensor and a speed measuring circuit are sequentially connected with each other and then are connected with the field programmable gate array; a switching-on/off control circuit and a break fault recording circuit are respectively connected with the field programmable gate array; and the field programmable gate array, a PC(Personal Computer)/104 bus connector, an industrial personal computer and a touch display are sequentially connected. With the adoption of the mechanical property test device for the special breaker, the test requirements on twospecial breakers including the breaker with a switching-off resistor and a graphite contact breaker of Siemens on the field can be met and the test device has the advantages of high automation degree, high precision of test results, visual display and the like.
Description
Technical field
The present invention relates to a kind of equipment that the mechanical property of the extraordinary isolating switch that uses in the electric system is carried out verification; Relate in particular to a kind of isolating switch of band switching-on resistance and graphite contact breaker mechanic property testing system of Siemens Company of being applicable to.
Technical background
Isolating switch is control and protection equipment important in the electric system, and to the important role in safe operation of electrical network, the reliability of isolating switch depends on the reliability of its mechanically actuated system to a great extent.According to GB50150-2006 " electrical equipment commissioning test standard " requirement, commissioning test must be carried out the test of mechanical property parameter.
Isolating switch is of a great variety, and is wherein special with the graphite contact isolating switch method of testing of the isolating switch of switching-on resistance and Siemens Company, the data analysis complexity, and the testing tool performance requirement height to relevant does not still have test macro effectively easily at present.
Summary of the invention
The purpose of this invention is to provide a kind of satisfied scene to the high extraordinary breaker mechanic property proving installation of testing requirements, testing precision of the graphite contact isolating switch of the band isolating switch of switching-on resistance and Siemens Company.
For realizing this purpose, the extraordinary breaker mechanic property proving installation that the present invention is designed comprises measuring current source, current sensor, constant current source, fracture voltage sensor, multi-channel data modulate circuit, hyperchannel AD converter speed pickup, velocity survey circuit, divide-shut brake control circuit, fracture record wave circuit, field programmable gate array (FPGA), PC104 bus interface, industrial computer, touch display;
Described measuring current source output terminal connects current sensor, described 10A constant current source output terminal connects the fracture voltage sensor, the output terminal of current sensor and fracture voltage sensor is connected to the multi-channel data modulate circuit, multi-channel data modulate circuit output terminal connects the hyperchannel AD converter, and hyperchannel AD converter output terminal connects described on-site programmable gate array FPGA;
The output terminal connection speed metering circuit of described speed pickup, the velocity survey circuit output end connects on-site programmable gate array FPGA;
Described fracture record wave circuit output terminal is connected to on-site programmable gate array FPGA, and the output terminal of programmable gate array FPGA connects the input end of divide-shut brake control circuit;
Described on-site programmable gate array FPGA, PC104 bus interface, industrial computer are connected successively with touch display.
In technique scheme, described measuring current source is in series by inner current-limiting resistance R and inner dc constant voltage source circuit, connect with the switching-on resistance of tested isolating switch again, produce the DC test electric current of 0-100mA, in the output test loop in measuring current source, be provided with the connection terminal for connecting band switching-on resistance isolating switch fracture.
Further, described constant current source is provided with in the output test loop of constant current source for the connection terminal that connects isolating switch graphite contact port for the DC source of output 10A electric current.
Further, be provided with six drive tests examination current source, every drive test examination current source is in series by inner current-limiting resistance R and inner dc constant voltage source circuit, connect with the switching-on resistance of tested isolating switch again, produce the DC test electric current of 0-100mA, in the output test loop in each measuring current source, be provided with the connection terminal for connecting band switching-on resistance isolating switch fracture.
Further, be provided with six road constant-current source circuits, every road constant-current source circuit is the DC source of output 10A electric current, is provided with for the connection terminal that connects isolating switch graphite contact port at the output test loop of every road constant current source.
In technique scheme, the multi-channel data modulate circuit carries out electric current to the conversion of voltage to the current signal of No. six current sensors output respectively, and the voltage signal after the conversion is carried out signal condition.The multi-channel data modulate circuit carries out electric current to the conversion of voltage to the current signal of No. six current sensors output respectively, and the voltage signal after the conversion is carried out signal condition.Simultaneously, the multi-channel data modulate circuit is also nursed one's health the voltage signal of six road fracture voltage sensors output respectively.Switched by the action of the signal relay of 6 passages through 12 channel voltage signals behind the signal condition.Finish the test of graphite contact fracture isolating switch or band switching-on resistance fracture isolating switch.
Described hyperchannel AD converter is carried out synchronous analog to digital conversion to six road voltage signals simultaneously, and the multi-channel data of conversion is outputed to field programmable gate array (FPGA) at a high speed
Described divide-shut brake control circuit is by constant pressure source, action current sensor and power switch are formed, action current sensor punching is connected in the test loop that constant pressure source and power switch be in series, test loop is connected to the control output end, when the power switch conducting constant voltage is applied to tested switching winding or closing coil.Simultaneously, the action current sensor is finished isolation conversion and the processing to the divide-shut brake coil current.
The isolation that described fracture record wave circuit is finished fracture voltage by photoisolator is changed, and the signal after the conversion is carried out discrete sampling.Obtain the action waveforms of fracture.
As shown from the above technical solution, extraordinary breaker mechanic property proving installation is finished separating brake and the combined floodgate of isolating switch by the divide-shut brake control circuit.The velocity survey circuit is finished the measurement of mechanical motion part travelling speed in the isolating switch course of action.The real-time waveform of fracture when fracture record wave circuit is finished the action of record isolating switch.The multi-channel data modulate circuit is finished the switching of the required passage of test event, and the sampling of real-time great dynamic range is carried out by the hyperchannel AD converter in the back.By field programmable gate array (FPGA) each data is carried out scratchpad in data-carrier store again, the instruction of the man-machine interaction of the data based touch display in the data-carrier store, import temporary data high-speed into industrial computer by the PC104 bus interface, by industrial computer analysis, calculating and demonstration as a result etc.
Therefore, the present invention adopts technique scheme, has following beneficial effect and advantage:
1, proving installation of the present invention satisfies the requirement of breaker mechanic property parameter test among the GB GB50150-2006 " electrical equipment commissioning test standard ";
2, by the high speed acquisition of multi-channel and high capacity data, automatic processing and the calculating of back-end data replace the manual analysis work of extraordinary isolating switch complexity, reduce the randomness of test figure;
3, integrated extraordinary isolating switch and conventional circuit breaker pilot project satisfy the various testing requirementss of on-the-spot isolating switch in one;
4, the isolating switch configuration parameter of different model can be remembered and manage to test macro automatically, thereby strengthen the standardization of site test, improves the work efficiency of site test.
Description of drawings
Fig. 1 is block diagram of the present invention;
Fig. 2 is the breaker mechanic property measuring principle figure of single channel band switching-on resistance;
Fig. 3 is single channel graphite contact breaker mechanic property measuring principle figure.
Wherein:
1-measuring current source;
The 2-current sensor;
The 3-10A constant current source;
4-fracture voltage sensor;
5-multi-channel data modulate circuit;
6-hyperchannel AD converter;
The 7-speed pickup;
8-velocity survey circuit;
9-divide-shut brake control circuit,
10-fracture record wave circuit;
11-field programmable gate array (FPGA);
The 12-PC104 bus interface;
The 13-industrial computer;
The 14-touch display.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing and example:
One, general structure
Extraordinary breaker mechanic property proving installation as shown in Figure 1 comprises measuring current source 1, current sensor 2,10A constant current source 3, fracture voltage sensor 4, multi-channel data modulate circuit 5, hyperchannel AD converter 6, speed pickup 7, velocity survey circuit 8, divide-shut brake control circuit 9, fracture record wave circuit 10, on-site programmable gate array FPGA 11, PC104 bus interface 12, industrial computer 13 and touch display 14; Measuring current source 1 output terminal connects current sensor 2,10A constant current source 3 output terminals connect fracture voltage sensor 4, the output terminal of current sensor 2 and fracture voltage sensor 4 is connected to multi-channel data modulate circuit 5, multi-channel data modulate circuit 5 output terminals connect hyperchannel AD converter 6, and hyperchannel AD converter 6 output terminals connect on-site programmable gate array FPGA 11.On-site programmable gate array FPGA 11, PC104 bus interface 12, industrial computer 13 and touch display 14 link to each other successively.
Be provided with six drive tests examination current source 1, as shown in Figure 2, every drive test examination current source is in series by inner current-limiting resistance R and inner dc constant voltage source circuit, connect with the switching-on resistance of tested isolating switch again, produce the DC test electric current of six road 0-100mA, six current sensors are connected in six tunnel output test loops by the mode of punching.In the output test loop in each measuring current source, be provided with the connection terminal for connecting band switching-on resistance isolating switch fracture.Can finish the test with the mechanical property of the isolating switch of six road switching-on resistances simultaneously.
Be provided with six road 10A constant current sources 3, as shown in Figure 3, it is not the DC current of 10A with the current constant of load variations that every road 10A constant current source is exported one respectively.Six road 10A constant current sources output test loop is drawn by the connection terminal that is used for connection graphite contact fracture isolating switch respectively.During test, be connected respectively to tested graphite fracture.Six fracture voltage sensors are connected in parallel on the two ends of the connection terminal that connects isolating switch graphite contact fracture respectively.Can finish the test of the mechanical property of six road graphite contact fracture isolating switchs simultaneously.
On-site programmable gate array FPGA 11, formed by a fpga chip and the coupled outer SDRAM of sheet, carry out sequential by 11 pairs of hyperchannel AD converter of on-site programmable gate array FPGA and control collection accurately, simultaneously, the data of the high-speed figure stream of 11 pairs of hyperchannel AD converter outputs of on-site programmable gate array FPGA are handled, are transmitted and preserve.
Principle of work of the present invention and function realize:
Extraordinary isolating switch test refers to the test at two kinds of isolating switchs, and a kind of is the isolating switch of band switching-on resistance, and a kind of is the graphite contact isolating switch of Siemens Company.Their method of testing is different from conventional isolating switch method of testing.
The isolating switch of band switching-on resistance has two moving contacts, and one is main contact, and another is auxilliary contact, has a switching-on resistance on the auxilliary contact.During combined floodgate, auxilliary contact closes earlier, and main contact closes again immediately, and after main contact closed, through the very short time time-delay, auxilliary contact can retract automatically, and is namely only through-flow by main contact; During separating brake, by the main contact disjunction.This isolating switch mainly is used in transmission line of electricity above the high-tension line more than 100 kilometers, and purpose is the switching overvoltage of restriction making process.
Single channel transition resistance test philosophy such as Fig. 2.There is one road constant voltage power supply circuit Vcc proving installation inside, is connected by a current-limiting resistance R, current sensor and outside fracture.When closing a floodgate test, when auxilliary contact and main contact all do not close, test loop no current, current sensor no-output.When auxilliary contact closed, the isolating switch transition resistance inserted test loop, and test loop has electric current I, and current sensor has output.When main contact closed, the isolating switch transition resistance was by the main contact short circuit, and electric current I can increase, and remains certain value.Test loop range of current 0-100mA, full test transition resistance are 5k Ω.If the voltage of inner constant pressure source is Vcc, the resistance of inner current-limiting resistance is R, and the electric current that flows through test loop is I.The transition resistance resistance Rx of test is
Rx＝Vcc/I-R
According to following formula as can be known, after inner constant source voltage and current-limiting resistance are determined, by on-site programmable gate array FPGA the hyperchannel AD converter is carried out the accurate high speed analog-to-digital conversion of sequential, obtain test loop electric current and sampling instant.By industrial computer the parameters such as time of closing transition resistance resistance, transition resistance turn-on time, main contact are analyzed, calculated to test data.Separating brake in like manner.There are 6 tunnel identical measurement loops proving installation inside, can measure the fracture of 6 road band switching-on resistance isolating switchs simultaneously.
And the structure of graphite contact isolating switch is special, and its moving contact front end roughly has the graphite section of 22mm, is mainly used to bear the arcing of divide-shut brake process, reduces the scaling loss degree of contact metal part, prolongs the contact life-span.The characteristics of graphite contact section present the good conductor characteristic when being big electric current, and the nonmetal characteristic that presents during little electric current.
Single channel graphite contact test philosophy is seen Fig. 3, in every drive test examination loop, 10A constant current source outlet opening voltage 5V, the measuring current of the constant 10A of short-circuit current, be connected to the fracture of tested graphite contact by splicing ear, range in parallel is the fracture voltage sensor of 250mV at the two ends of the fracture of tested graphite contact, by measuring voltage sensor secondary voltage, can obtain fracture voltage.During the graphite contact breaker closing, graphite arcing contact and static contact metal water conservancy diversion bridge joint touch, and the constant measuring current I of 10A punctures graphite arcing contact, continuity test loop.Because of the characteristic of semiconductor of graphite arcing contact, graphite arcing contact contact area is little, and contact resistance value R is bigger, and fracture voltage U is also big.Along with the slip of graphite arcing contact, fracture voltage U is reduced to when equaling 10mV, has according to Ohm law
R＝U/I＝10mV/10A＝1mΩ
When being reduced to, graphite arcing contact contact resistance equals 1m Ω, can judge that moving contact graphite section contacts with static contact fully, present moving contact back segment metal short circuit characteristic, by to the measurement constantly of metal short circuit, can obtain the feed motion time of graphite contact isolating switch.The principle that the separating brake process is same, along with the slip of graphite contact, the graphite contact contact resistance increases to the Ω greater than 1m, and fracture voltage is during greater than 10mV, can judge that moving contact metal part separates with static contact fully, is rendered as the characteristic of graphite contact contact.By to metal separation measurement constantly, can obtain the separating brake actuation time of graphite contact isolating switch.There are six road 10A constant current sources proving installation inside, can measuring current is provided for simultaneously six fractures of graphite contact isolating switch, carries out the test of Siemens's six fracture graphite contact breaker mechanic properties.
On-site programmable gate array FPGA is made up of a fpga chip and the coupled outer SDRAM of sheet.On-site programmable gate array FPGA control hyperchannel AD converter is carried out the sequential accurate signal and is changed synchronously.Simultaneously, the data of the high-speed figure stream of 11 pairs of hyperchannel AD converter outputs of on-site programmable gate array FPGA are handled, are transmitted and preserve.
Industrial computer is made up of industrial control computer.Link to each other with touch display.Touch display is finished the man-machine interaction work in the test process, shows various test datas, waveform and instruction input.Data by on-site programmable gate array FPGA control hyperchannel AD converter high speed acquisition are transferred to calculating, analysis, preservation and the output that industrial computer carries out signal data by the PC104 interface.Device can show fracture state waveform, the current waveform of divide-shut brake coil, stroke-time S-t curve by corresponding time coordinate, is conducive to the accurate judgement to the breaker mechanism fault.Can obtain close time, main contact of auxilliary contact by the computational analysis to waveform and close time, switching-on resistance turn-on time, switching-on resistance value, closing rebound number of times, the alternate same period etc., thereby finish test job to band switching-on resistance isolating switch; And obtain graphite contact isolating switch metal short circuit constantly, and circuit-breaker switching on-off time, spring number of times, the alternate same period etc., thus test job to the graphite contact isolating switch finished.
Claims (5)
1. extraordinary breaker mechanic property proving installation, comprise measuring current source (1), current sensor (2), constant current source (3), fracture voltage sensor (4), multi-channel data modulate circuit (5), hyperchannel AD converter (6), speed pickup (7), velocity survey circuit (8), divide-shut brake control circuit (9), fracture record wave circuit (10), on-site programmable gate array FPGA (11), PC104 bus interface (12), industrial computer (13), touch display (14), it is characterized in that:
Described measuring current source (1) output terminal connects current sensor (2), described constant current source (3) output terminal connects fracture voltage sensor (4), the output terminal of current sensor (2) and fracture voltage sensor (4) is connected to multi-channel data modulate circuit (5), multi-channel data modulate circuit (5) output terminal connects hyperchannel AD converter (6), and hyperchannel AD converter (6) output terminal connects described on-site programmable gate array FPGA (11);
The output terminal connection speed metering circuit (8) of described speed pickup (7), velocity survey circuit (8) output terminal connects on-site programmable gate array FPGA (11);
Described fracture record wave circuit (10) output terminal is connected to on-site programmable gate array FPGA (11), and the output terminal of on-site programmable gate array FPGA (11) connects the input end of divide-shut brake control circuit (9);
Described on-site programmable gate array FPGA (11), PC104 bus interface (12), industrial computer (13) and touch display (14) are connected successively;
Finish separating brake and the combined floodgate of isolating switch by divide-shut brake control circuit (9), velocity survey circuit (8) is finished the measurement of mechanical motion part travelling speed in the isolating switch course of action, the real-time waveform of fracture when fracture record wave circuit (10) is finished the action of record isolating switch, multi-channel data modulate circuit (5) is finished the switching of the required passage of test event, the sampling of real-time great dynamic range is carried out by hyperchannel AD converter (6) in the back, by on-site programmable gate array FPGA (11) each data is carried out scratchpad in data-carrier store again, the instruction of the man-machine interaction of the data based touch display (14) in the data-carrier store, import temporary data high-speed into industrial computer (13) by PC104 bus interface (12), analyzed by industrial computer (13), calculate and the demonstration result.
2. extraordinary breaker mechanic property proving installation according to claim 1, it is characterized in that: described measuring current source (1) is in series by inner current-limiting resistance R and inner dc constant voltage source circuit, connect with the switching-on resistance of tested isolating switch again, produce the DC test electric current of 0-100mA, in the output test loop of measuring current source (1), be provided with the connection terminal for connecting band switching-on resistance isolating switch fracture.
3. extraordinary breaker mechanic property proving installation according to claim 1, it is characterized in that: described constant current source (3) is provided with in the output test loop of constant current source (3) for the connection terminal that connects isolating switch graphite contact fracture for the DC source of output 10A electric current.
4. extraordinary breaker mechanic property proving installation according to claim 2, it is characterized in that: be provided with six drive tests examination current source (1), every drive test examination current source (1) is in series by inner current-limiting resistance R and inner dc constant voltage source circuit, connect with the switching-on resistance of tested isolating switch again, produce the DC test electric current of 0-100mA, in the output test loop in each measuring current source (1), be provided with the connection terminal for connecting band switching-on resistance isolating switch fracture.
5. extraordinary breaker mechanic property proving installation according to claim 3, it is characterized in that: be provided with six road constant current sources (3), every road constant current source (3) is provided with in the output test loop of every road constant current source (3) for the connection terminal that connects isolating switch graphite contact fracture for the DC source of output 10A electric current.
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|---|---|---|---|
| CN 201110219314 CN102411124B (en) | 2011-08-02 | 2011-08-02 | Mechanical property test device for special breaker |
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| CN 201110219314 CN102411124B (en) | 2011-08-02 | 2011-08-02 | Mechanical property test device for special breaker |
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| CN102411124B true CN102411124B (en) | 2013-09-25 |
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| CN103207369B (en) * | 2013-03-20 | 2015-06-24 | 中国西电电气股份有限公司 | Method for improving accuracy of breaking test data analysis of circuit breaker |
| CN104238398A (en) * | 2013-06-24 | 2014-12-24 | 成都旋极历通信息技术有限公司 | Multi-channel synchronous data acquisition card based on PC104 bus |
| CN103558545B (en) * | 2013-11-16 | 2015-12-09 | 沈阳工业大学 | A kind of isolating switch closes pre arcing time pick-up unit and method |
| CN104267343B (en) * | 2014-10-17 | 2015-08-12 | 广东电网有限责任公司佛山供电局 | Fault state of circuit breaker diagnostic method and fault state of circuit breaker diagnostic device |
| CN105510816B (en) * | 2015-11-30 | 2018-05-15 | 浙江美硕电气科技股份有限公司 | Relay debugs machine automatically |
| CN105823983A (en) * | 2016-05-06 | 2016-08-03 | 国家电网公司 | Mechanical characteristic state on-line monitoring system for high voltage breaker |
| CN106249142A (en) * | 2016-10-18 | 2016-12-21 | 国网江苏省电力公司电力科学研究院 | A kind of extra-high voltage switch intelligent device for measuring |
| CN106707156A (en) * | 2016-12-30 | 2017-05-24 | 北京新能中试科技有限公司 | On-line wave recording method and device for circuit breaker opening-closing coil |
| CN106597275A (en) * | 2017-03-02 | 2017-04-26 | 福建瑞能博尔电力设备有限公司 | High-voltage switch motion characteristic test method and tester |
| CN108845251A (en) * | 2018-06-26 | 2018-11-20 | 国网黑龙江省电力有限公司绥化供电公司 | The GIS combination electric appliance comprehensive tester and test method of double-station disconnecting link |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2123117U (en) * | 1992-03-18 | 1992-11-25 | 中国人民解放军通信工程学院 | Mechanical tester of high-voltage breaker |
| CN1107227A (en) * | 1994-02-16 | 1995-08-23 | 中国电力工业部电力科学研究院 | High-voltage breaker mechanic property testing system and on-line checking method |
| CN201335878Y (en) * | 2008-12-23 | 2009-10-28 | 上海德力西集团有限公司 | Testing device for mechanical characteristics of vacuum circuit breaker based on DSP in medium voltage power network |
| CN101592559A (en) * | 2009-06-30 | 2009-12-02 | 河南省电力公司商丘供电公司 | System for testing mechanical properties of integral circuit breaker |
| CN202256613U (en) * | 2011-08-02 | 2012-05-30 | 广东威恒输变电工程有限公司 | Device for testing mechanical properties of special circuit breakers |
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Effective date of registration: 20220601 Address after: 528200 room 326, block 4, No. 33, Jihua East Road, Guicheng Street, Nanhai District, Foshan City, Guangdong Province Patentee after: GUANGDONG WEIHENG POWER TRANSMISSION AND DISTRIBUTION ENGINEERING CO.,LTD. Patentee after: Foshan Power Supply Bureau of Guangdong Power Grid Co., Ltd Address before: 430073 Room 502, block a, Huazhong Shuguang Software Park, special 1, Guanshan 1st Road, Donghu Development Zone, Wuhan City, Hubei Province Patentee before: GUANGDONG WEIHENG POWER TRANSMISSION AND DISTRIBUTION ENGINEERING CO.,LTD. |
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