CN106597158A - Distribution transformer integrated detection device - Google Patents

Distribution transformer integrated detection device Download PDF

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Publication number
CN106597158A
CN106597158A CN201611139449.1A CN201611139449A CN106597158A CN 106597158 A CN106597158 A CN 106597158A CN 201611139449 A CN201611139449 A CN 201611139449A CN 106597158 A CN106597158 A CN 106597158A
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CN
China
Prior art keywords
integrated
distribution transformer
transformer
test
detection
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CN201611139449.1A
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Chinese (zh)
Inventor
徐宽
高存玉
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SHANGHAI OUMIAO ELECTRIC POWER MONITORING EQUIPMENT CO Ltd
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SHANGHAI OUMIAO ELECTRIC POWER MONITORING EQUIPMENT CO Ltd
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Priority to CN201611139449.1A priority Critical patent/CN106597158A/en
Publication of CN106597158A publication Critical patent/CN106597158A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere

Abstract

Provided is a distribution transformer integrated detection device comprising: a mobile device, and a detection module, an integrated wiring module, an integrated controller and a central controller arranged on the mobile device, the detection module accesses the integrated controller through the integrated wiring module to realize the automatic test of a distribution transformer, and the central controller realizes the analysis and storage of the test data. The distribution transformer integrated detection device can be conveniently detached and assembled and can be conveniently checked and maintained, performs integral control and management to complete the overall test report, performs the unified data management and diagnosis analysis, can comprehensively improve the efficiency, level, and quality of the electrical test, reduces the heavy carrying workload of the equipment during the test, improves the reliability of the transformer operation and technical management level to a large extent, can safely, flexibly, rapidly and effectively complete the relevant test projects, and realizes the intensive, digitalized, intelligent, and maneuvering transformation of the transformer equipment on-site test.

Description

Distribution transformer comprehensive detection device
Technical field
The present invention relates to a kind of distribution transformer comprehensive detection device.
Background technology
The safe and stable operation of power system is most important task, and wants the safe and stable operation of safeguards system, first Must assure that the state of equipment.Therefore, equipment complete it is initial install and debug, equipment exists during one's term of military service and in equipment and lacks When sunken, according to the requirement of various Regulations, various types of tests and detection are carried out to power equipment, to guarantee that equipment is in Normal condition, is electric power equipment management, the important content safeguarded.After power grid construction task is completed, visual plant is carried out and is handed over Connect test, it is ensured that equipment installs the requirement that situation meets service condition, possesses the condition for putting into operation.
According to the requirement of national standard and relevant industries standard, important primary equipment, such as electromotor, transformator, switch Equipment, spark gap, transformer etc., it is necessary to carry out preventive trial as requested.Can in every service data shows equipment When energy existing defects or Hidden fault, need to carry out special test for relevant device.
Distribution transformer is easy to occur in operation resistance value rising, insulation ag(e)ing, shelf depreciation, makes moist or local mistake The phenomenons such as heat, for the above phenomenon transformer synthesis test and fault diagnosis are implemented, and are transported for whole power system security is improved Capable reliability is very important.
With social constantly progressive and development, number transformer constantly increases sharply in distribution, and various circles of society are to distribution net equipment Reliability and safety put forward higher requirement.Thus whether distribution transformer did conventional preventive trial, done Whether content of the test is complete and up to standard is also always the problem paid close attention to always of distribution net equipment receipt control process.And it is current due to thing Money centralized bidding, some transformers are tighter due to the duration, carry out before Product Process often has problems, therefore transformator puts into operation comprehensive The necessity for closing test is greatly increased.In addition after transformer field is damaged, have to carry out single armed, double the reason for for its failure Arm bridge measurement D.C. resistance, insulating megger survey phase insulation resistance, and instrument is various.What is more, needs when transformator is torn open Unload down, just can be looked for using upper a couple of days such as the means such as pendant-core examination, the real causess needs of transformer fault line transformer is entered Arrive, therefore how in fault in-situ the real causess of transformer fault to be identified rapidly, it is very necessary.And it is domestic at present each Electric power saving system relevant departments carry out distribution transformer test to be carried out out of doors mostly, and pattern is also mostly will test to after scene Instrument is lifted to tested device, and wiring at the scene connects and tested again after power supply.This traditional method has many not convenient Where, when especially field accident is rushed to repair, because various factors is limited, more waste time and energy.Particularly winter when outdoor ring Border inclement condition, sometimes resulting in some test apparatuses cannot work, and affect the ability of testing crew operating instrument, delay test Time, the accuracy of result of the test is affected, affect testing crew for the accuracy of test result analysis.So, it is necessary Improvement in ways of carrying out is tested to outdoor distribution transformer.
China uses traditional battery of tests and sets currently for the most of electrical test equipments of electricity distribution power equipment It is standby, it is impossible to complete full-automatic test function, and because volume is larger, carry also very inconvenient.What is more important, generally Test equipment does not have enough computer interfaces, and test data can not be transferred in computer, thus cannot effectively use phase Close software to be analyzed.Additionally, traditional testing equipment needs manually to be operated, and test with the micro-judgment of oneself Whether data are qualified, for the less abundant testing crew of field experience, because of error or experience in operation Lack and cause result relatively large deviation occur.Importantly, test data can not retain for a long time, need to such as retain and be also required to carry out Manual record, increases the difficulty of inquiry record.
In addition grid company further increases power supply quality and power grid security requirement, equipment is overhauled, safeguard, is tried The task amount tested drastically expands.And the personnel of power department transformator detections at different levels prepare relative deficiency, personnel expand to be needed again In certain cycle, cause the contradiction that production task drastically expands and personnel increase between deficiency.
The content of the invention
The present invention provides a kind of distribution transformer comprehensive detection device, can easily carry out disassembly and assembly, is easy to send Inspection and keep in repair, integrated control and management can complete omnibearing test report, carry out unified data management and diagnostic analysiss, Efficiency, level and the quality of electrical test can be comprehensively improved, mitigates instrument handling workload heavy in process of the test, very greatly The reliability and technology management level of transformer station high-voltage side bus are improve to degree, energy is safe, motor-driven, quick, effectively complete correlation Pilot project, realizes the change of converting equipment field test " intensive, digitized, intellectuality, motorization ".
In order to achieve the above object, the present invention provides a kind of distribution transformer comprehensive detection device, comprising:
Mobile device, the portable mobile of its achievable distribution transformer comprehensive detection device;
Detection module, it is arranged on the mobile device, for doing various detections to distribution transformer;
Integrated wiring modules, it is arranged on the mobile device, and is electrically connected with detection module, for realizing to detection module Circuit integrated access;
Integrated manipulator, it is arranged on the mobile device, and is electrically connected with integrated wiring modules, for utilizing detection module Realize the automatic test to distribution transformer;
Central controller, it is arranged on the mobile device, and is electrically connected with integrated manipulator, for realizing to test data Analysis and storage.
Described detection module is included:
No-load transformer load characteristic test module, it accesses integrated manipulator by integrated wiring modules, for measuring The no-load current of distribution transformer, open circuit loss, short-circuit voltage and short circuit loss;
Transformer noload losses characteristic test module, it accesses integrated manipulator by integrated wiring modules, for distribution The capacity check of transformator;
Transformer impedance drop characteristic test module, it accesses integrated manipulator by integrated wiring modules, for master Transformator carries out low-voltage short-circuit impedance measurement;
Transformer alternating voltage endurance test module, it accesses integrated manipulator by integrated wiring modules, for measuring The maximum pressure voltage of distribution transformer;
Transformer Winding D.C. resistance detection module, it accesses integrated manipulator by integrated wiring modules, for measuring The winding D.C. resistance of distribution transformer;
Insulation Resistance Tester, it accesses integrated manipulator by integrated wiring modules, for measuring distribution transformer Insulation resistance, absorptance and polarization index;
Dielectric loss tangent tester, it accesses integrated manipulator by integrated wiring modules, becomes for measuring distribution The dielectric loss angle of depressor;
Load switch of transformer tester, it accesses integrated manipulator by integrated wiring modules, for measuring and analyzing Distribution transformer load ratio bridging switch electricity function index.
Described distribution transformer comprehensive detection device is also included:Power supply, it is arranged on the mobile device, and is electrically connected with Integrated manipulator and integrated wiring modules, for providing electric power.
Described distribution transformer comprehensive detection device is also included:UPS back-up sources, it is arranged on the mobile device, and Integrated manipulator and power supply are electrically connected with, for providing back-up electric power.
Described distribution transformer comprehensive detection device is also included:Environment monitoring module, it is arranged on the mobile device, and Integrated manipulator is electrically connected with, for monitoring of environmental temperature and humidity data.
Described distribution transformer comprehensive detection device is also included:Security protection module, it is arranged on the mobile device, and Integrated manipulator is electrically connected with, for guaranteeing distribution transformer comprehensive detection device safe operation.
All test modules and tester in described detection module are all designed using portable moduleization.
Described integrated wiring modules have multiple expansible connection jaws.
Integrated control software is loaded on described integrated manipulator, the full-automatic testing to distribution transformer is realized.
Described central controller adopts computer.
The present invention can easily carry out disassembly and assembly using portable moduleization design, be easy to censorship and maintenance, integrated Control and management can complete omnibearing test report, carry out unified data management and diagnostic analysiss, can improve comprehensively The efficiency of electrical test, level and quality, mitigate instrument handling workload heavy in process of the test, it is to avoid it is a large amount of it is time-consuming, Arduously, the back work of external equipment is relied on, flow process is simplified, the time is shortened, testing equipment is also reduced numerous in carrying During cause the impaired risk of equipment, motility and the mobility of field test work are improve, while using easily grasping Make, rapidly failure transformer is diagnosed, judge whether equipment working state is normal exactly, timely discovering device defect With hidden danger, and field personnel can also be reduced while several times improve work efficiency, reduce labor intensity, improve test Condition, contributes to the development of power system field test technology and solves the contradiction between the expansion of undermanned and production task, So as to ensure the safe and reliable operation of equipment, the reliability and technology management level of transformer station high-voltage side bus is largely improve, Can it is safe, motor-driven, quick, effectively complete correlation test project, realize converting equipment field test " intensive, digitized, The change of intelligent, motorization ".
Description of the drawings
Fig. 1 is a kind of structured flowchart of distribution transformer comprehensive detection device that the present invention is provided.
Specific embodiment
Presently preferred embodiments of the present invention is illustrated below according to Fig. 1.
As shown in figure 1, the present invention provides a kind of distribution transformer comprehensive detection device, comprising:
Mobile device (not shown), the portable mobile of its achievable distribution transformer comprehensive detection device;
Detection module 4, it is arranged on the mobile device, for doing various detections to distribution transformer;
Integrated wiring modules 3, it is arranged on the mobile device, and is electrically connected with detection module 4, for realizing to detecting mould The circuit integrated access of block 4;
Integrated manipulator 1, it is arranged on the mobile device, and is electrically connected with integrated wiring modules 3, for using detection mould Block 4 realizes the automatic test to distribution transformer;
Central controller 2, it is arranged on the mobile device, and is electrically connected with integrated manipulator 1, for realizing to testing number According to analysis and storage;
Power supply 5, it is arranged on the mobile device, and is electrically connected with integrated manipulator 1 and integrated wiring modules 3, for carrying For electric power;
UPS back-up sources 6, it is arranged on the mobile device, and is electrically connected with integrated manipulator 1 and power supply 5, for providing Back-up electric power;
Environment monitoring module 7, it is arranged on the mobile device, and is electrically connected with integrated manipulator 1, for monitoring of environmental temperature The data such as degree and humidity;
Security protection module 8, it is arranged on the mobile device, and is electrically connected with integrated manipulator 1, for guaranteeing that distribution becomes Depressor comprehensive detection device safe operation.
Described mobile device can be using handbarrow or other similar movable equipments.
Described detection module 4 is included:
No-load transformer load characteristic test module 401, it passes through integrated wiring modules 3 and accesses integrated manipulator 1, is used for Measure no-load current, open circuit loss, short-circuit voltage and the short circuit loss of distribution transformer;
Transformer noload losses characteristic test module 402, it passes through integrated wiring modules 3 and accesses integrated manipulator 1, is used for The capacity check of distribution transformer;
Transformer impedance drop characteristic test module 403, it passes through integrated wiring modules 3 and accesses integrated manipulator 1, is used for At the scene low-voltage short-circuit impedance measurement is carried out to 6KV levels and above main transformer with laboratory condition;
Transformer alternating voltage endurance test module 404, it passes through integrated wiring modules 3 and accesses integrated manipulator 1, is used for The maximum pressure voltage of measurement distribution transformer;
Transformer Winding D.C. resistance detection module 405, it passes through integrated wiring modules 3 and accesses integrated manipulator 1, is used for The winding D.C. resistance of measurement distribution transformer;
Insulation Resistance Tester 406, it passes through integrated wiring modules 3 and accesses integrated manipulator 1, for measuring distribution transformer The insulation resistance of device, absorptance and polarization index;
Dielectric loss tangent tester 407, it passes through integrated wiring modules 3 and accesses integrated manipulator 1, matches somebody with somebody for measurement The dielectric loss angle of piezoelectric transformer;
Load switch of transformer tester 408, its pass through integrated wiring modules 3 access integrated manipulator 1, for measurement and Analysis distribution transformer load ratio bridging switch electricity function index is (comprising transit time, transition waveform, transition resistance, three identical The parameters such as phase property).
In one embodiment of the invention, described no-load transformer load characteristic test module 401 using 240 × 128 matrix liquid-crystal display screens show the parameters such as three-phase voltage, electric current, low-pressure side voltage, power, power factor simultaneously, giant-screen, The liquid crystal display of high brightness, full menu Chinese character and operation indicating realize friendly human computer conversation, and touch key-press makes operation easier, Range of linearity width, reading are reproducible, stable performance, it is ensured that the accurate measurement of power factor 0.000~1.000, especially suitable In the detection of low power factor load, latch function ensures the convenience of measurement data while property and operation, and voltage maximum can 750V is measured, without switching gear precision can be ensured, instrument itself will not have been damaged because the choosing of voltage gear is wrong, can The data of test are printed result by mini-printer at any time, test power supply is using the stable electricity of high pressure 40kV&10mA Potential source and 240A (500% most 1000A/3s) high current constant current source, ammeter adopts the digital LCD of digital display 3 1/2, range 0-1.999/19.99/199.9/1999, precision 1%, the range 0-40kV of voltmeter, the reading of precision 0.8% and 0.2% full amount Journey the greater.
Described transformer noload losses characteristic test module 402 is using advanced A/D synchronous A.C samplings and numeral letter Number treatment technology, simple to operate, easy-to-connect, data accurately and reliably, solve a difficult problem for distribution transformer capacity test, and can The measurement data that display, printing user are concerned about, superior performance is powerful, fully meets live electricity distribution power transformer capacity The requirement of test.The experiment power supply for carrying once charges can complete the examination of 100 2500KVA and following distribution transformer capacity Test, man-machine interface is completed using the complete Chinese Chinese character image display of blue screen (240*128), menu strict hierarchy, progressively guiding Test, is greatly improved work efficiency, reduces labor intensity.Voltage measurement scope:0~750V width amount is limited, current measuring range: The whole automatic switching ranges in 0~50A inside, voltage, electric current, ± 0.2%, power:± 0.5% (Cos Φ > 0.1), ± 1.0% (0.02 < Cos Φ < 0.1), operating temperature:- 10 DEG C~+40 DEG C, voltage, current input terminal to the insulation resistance of casing >= 100M Ω, working power input is to bearing power frequency 2kV, working power between shell:Exchange 160V~400V, volume:38cm ×28cm×15cm。
Adopted using voltage, the exchange of electric current high-precise synchronization the described inside of transformer impedance drop characteristic test module 403 The Digital Signal Processing such as sample and FFT, measurement data is accurate, stable.Using three-phase or single-phase metering system, low pressure is only needed Side short circuit, without short circuit, after selecting transformator to be coupled, one-shot measurement can automatically calculate the short of every phase to high-pressure side non-test Roadlock resists.With low current test, automatically conversion, to rated current function, is adapted to onsite application.Can synchro measure voltage, electric current, Power, supply frequency.Can automatically record test data, built-in not power down memorizer, can longer-term storage measurement data, carry at a high speed Thermal printer, can carry large color screen liquid crystal display with field print test data, and whole menu in Chineses and operation are carried Show, simple and direct-viewing operation.Measuring accuracy is high, and the measuring accuracy of the basic parameter such as electric current, voltage is better than 0.1%, system stability Property it is high, strong antijamming capability, using software digital filter, hardware anti-aliasing filtering Anti-Jamming Technique, makes the stable testing degree of system And capacity of resisting disturbance all improves a lot than same quasi-instrument.Verification, testing instruments make life using the NORMA4000 of LEM companies The equipment of product can precision trace to the source.With the electric current input channel that three independent voltages and three are independent, Measurement channel is adopted With 16bit height a/d converters, all Channel Synchronous collections, power calculation accuracy is set to have basic guarantee, HR1100 meets institute There is the wiring metering system of transformator.Transformation still can be accurately measured under voltage, current waveform Severe distortion and low power factor Device resistance value.All TCH test channels are completely isolated, independent, automatically adjust external PT, CT of all input channels of range ability Change can be set respectively.
What the reactor L of described transformer alternating voltage endurance test module 404 and the electric capacity C of tested transformator were constituted Series resonance has fixed resonant frequency F=1/ (2 π √ LC), when test frequency is equal to this frequency, the circuit Generation resonance.By this principle, provide power supply by variable frequency power source and give exciting transformer, in exciting transformer becomes and is pressed into On electric capacity C of the pressure plus L and tested transformator.By changing variable frequency power source output frequency, loop is made in series resonance state, Variable frequency power source output voltage is adjusted again, and the upper voltage for making tested transformator reaches required magnitude of voltage.The transformer alternating is resistance to The direct test voltage source of pressure characteristic test module 404 is 40kV, voltmeter range 0-40kV, precision take 0.8% reading and 0.2% full scale the greater, ammeter range 0-10mA.
The detection of Transformer Winding D.C. resistance is a critically important pilot project, and code specifies that it is transformer overhaul When, no load switch adjust a wage scale after, project must be tried after cutting-out of voltage changer and during prerun etc..In all pilot projects of transformator It is a test that is more convenient and effectively examining winding minor insulation and current loop connection state, it can reflect winding turns Between short circuit, stranded winding, shunting switch contact condition and conductor resistance the defect failure such as difference and junction contacts is bad, It is to judge whether each phase winding D.C. resistance balances, the whether correct effective means of tap changer gear.For a long time, winding is straight The measurement of leakage resistance is considered as always to examine or check one of Main Means that transformer longitudinal insulate, and current loop is even judged sometimes Unique method of connection state.
Transformer Winding is equivalent to an inductance and resistance R by described Transformer Winding D.C. resistance detection module 405 Series loop, formed a winding D.C. resistance fundamental measurement circuit, close a switch K, and loop-voltage equation formula is:E=L (di/dt)iR.In view of switch imperfection, if after closing a switch voltage E moment be t=0, now the wink in circuit by Formula is visible, regardless of circuit state during measuring transformer winding D.C. resistance, only need to successively measure i (t1), the i in formula (t2), i (t3), is obtained the value of R under the conditions of known to electrical source voltage E.Therefore time of measuring can be made arbitrarily short, with reality The D.C. resistance R of Winding in Power Transformer is now quickly measured, this detection method fundamentally eliminates the steady statue of circuit Impact to measuring, can to greatest extent realize quick measurement, and this is that other measuring methods are beyond one's reach, and it overcomes tradition Power supply capacity needed for measuring method is big and seals in impact of the additional measuring cell such as resistance, electric capacity to accuracy of measurement.The transformation Device winding D.C. resistance detection module 405 automatically selects output current (maximum can export 20A), measurement range width (0 Ω -50 Ω), the perceptual D.C. resistance such as energy measuring transformer, transformer, display adopts 480*272 dot matrix 65K color large color screens, shows Show clear data readability, with perpetual calendar, 100 groups of data storages, the temperature function such as conversion automatically, data are not lost in shutdown, also Being provided with printer can export printing test data, and " USB flash disk " interface is convenient to derive data for consulting editor, is provided with RS485 and leads to Communication interface, coordinates host computer manipulation software, realizes that distant control is measured, and three identical brakes is provided with, to tackle wye connection Winding primary connection completes three-phase and directly hinders measurement, and three-phase imbalance rate is calculated automatically, is greatly saved time of measuring raising work effect Rate.Can also adopt by phase test function, carry out by mutually testing for the transformator of YN, D (Y) connected mode, test is completed, from It is dynamic to calculate three-phase imbalance rate, automatic magnetic assist function is additionally provided with, for the test of the post low pressure corner connection Transformer Winding of iron core five, adopt Tested with the method for high-low pressure series excitation magnetic, instrument internal links the magnetic assist loop of winding automatically, can quick and precisely be tested low The D.C. resistance of pressure winding, reports to the police with sound equipment electric discharge, and it is clear that electric discharge is indicated, reduces maloperation, with input misconnection AC380V Power protection alarm and protection function, reduces infringement of the maloperation to instrument, and the machine also has perfect back-emf protection tension arc Ability is strong, and Applicable temperature width, high precision, shockproof, anti-interference, stability are high, easy to carry.
Insulation resistance test is the test to transformator major insulation performance, and Main Diagnosis transformator is due to machinery, electric field, temperature The influence degree such as the effect such as degree, chemistry and moist filth, sensitive can reflect that transformer insulated entirety is made moist, entirety is deteriorated and insulated Penetrability defect, is one of Primary Reference criterion that can transformator put into operation.
Described Insulation Resistance Tester 406 is big, anti-using super-thin pull spring gauge outfit, the output of multiple voltage grade, capacity Interference is strong, AC/DC (c-type), it is simple to operate, with time reminding function, be measuring transformer, transformer, electromotor, The hypothesis testing instrument of the insulation resistances such as high-tension motor, electric capacitor, power cable, spark gap, its voltage output/measurement model Enclose:5000V, 200G ohm, 10000V, 400G ohm, additional function:Double aobvious (numeral, pointers), AC/DC band charges electric Pond, absorptance, polarization index test, short circuit current 3.3mA, the storage of 19 subparameters.
The change of dielectric loss angle can delicately find insulation of electrical installation integrally make moist, deteriorate it is rotten, insulating oil or The general ageing and small size insertion of SOLID ORGANIC insulant and non-through local defect, to low capacity equipment, may be used also It was found that local defect, therefore it is to study insulation ag(e)ing feature and one of on-line monitoring insulation status important to measure dielectric loss angle Content.
Described dielectric loss tangent tester 407 adopts intelligent dielectric loss tangent tester, wiring is simple, Strong antijamming capability, data are accurate, easy to operate, test speed fast, belong to balanced bridge, and adjust flat using digital technology Weighing apparatus.The dielectric loss factor measurement of distribution transformer and sleeve pipe, and in a relatively wide frequency range (highest 12kV, 300mA | frequency Rate scope be 15 ... 400Hz), and be not only the dielectric loss value is measured in system power frequency, contribute to preferably assessment insulation Whether state, such as detection fibers material or insulating oil receive the pollution of moisture.The routine of measurement dielectric loss tangent Wiring has positive connection, opposition method.Positive connection is suitable for the situation of test item two ends insulation against ground, and opposition method is suitable for test item one End ground connection, the situation of other end insulation against ground, scene can correctly select according to the Grounding of test item.Dielectric loss tangent Tester 407 is boosting and measurement integral structure, and output voltage 2.5KV-five grades of 10KV is adjustable, to adapt to various needs, Without the need for any external equipment during measurement, wiring is similar to QS electric bridges, but more convenient than it, and parameter setting is as follows:
Output 0.6KVA;
Measurement range and output voltage are selected:
Dielectric loss (tg δ):± 0.00~± 999%
Test product capacitance (Cx) and on-load voltage:
2.5KV shelves:≤300nF(300000pF)
3KV shelves:≤200nF(200000pF)
5KV shelves:≤76nF(76000pF)
7.5KV shelves:≤34nF(34000pF)
10KV shelves:≤20nF(20000pF)
Fundamental measurement error:
Dielectric loss (tg δ):1% ± 7 word (loading current 20uA~500mA)
Dielectric loss (tg δ):2% ± 9 word (loading current 5uA~20uA)
Capacitance (Cx):1.5% ± 1.5pF.
The factor for affecting dielectric loss tangent tan δ is included:
1st, the impact of temperature:Temperature has a direct impact to tan δ, effect with material, structure it is different and different.One As in the case of, tan δ be with temperature rise and increase.During field test, device temperature is change, for ease of comparing, Ying Jiang The tan δ-value measured under different temperatures is scaled to 20 DEG C.Because the real mean temperature of test item is to be difficult Accurate Determining, change Coefficient is calculated nor extremely meeting reality, therefore often has very big error after conversion.Therefore, should as far as possible in 10~30 DEG C of temperature Under measure.
2nd, the impact of test voltage:The tan δ of good insulation substantially do not increase with the rising of voltage.If insulating inner has Defect, then tan δ the rising with test voltage is substantially increased.
During the tan δ of test transformer, if test result exceedes after temperature conversion《Code》Setting, then it is assumed that It is unqualified.
Described load switch of transformer tester 408 solves current power transformer load tap changer measuring method Fall behind, the problem without special test means can in time be diagnosed to be in power equipment preventive trial and transformer overhaul The incipient fault of on-load shunting switch, the reliability to improving Operation of Electric Systems is significant.Load switch of transformer is surveyed Examination 408 points of triple channel of instrument, can simultaneously record A, in B, C three-phase transient process it is all excessively and saltus steps process, comprising can be seen that The time value of trip point, is not drawn sound by weather, and function is superior more than light oscillograph, is capable of achieving to divide having to carry in an instrument Connect the measurement of switch various parameters.Each function button can be coordinated by big screen LCD, in analysis waveform per point, it is every The resistance value of section and per of time, the time of each time period and three-phase not same period etc., analyzed by screen, it may be appreciated that switching During, the situation of change of each moment threephase switch various parameters waveform also can be printed, stored and consulted history waveform and entered Row analysis and contrast.
All test modules and tester in described detection module 4 are all designed using portable moduleization, meet international The universal standard (IEC 76, ANSI/IEEE C57.12.90), it is small volume, lightweight.
Described integrated wiring modules 3 have multiple expansible connection jaws, are capable of achieving to connect the compatibility of various detection modules Enter, wiring is simple, it is easy to operate.
Integrated control software is loaded on described integrated manipulator 1, the full-automatic testing to distribution transformer is realized, greatly Reduction testing time and human cost.
In one embodiment of the invention, described central controller 2 adopts computer, and test data is carried out in a large number Accumulation, and horizontal analyses and historical analysises are carried out to data, the assessment of equipment health status is carried out using equipment test data, it is right Defect cause is analyzed and regularity summarization, improves the level of equipment control.
The present invention is applied to the routine test of 10kV and above distribution transformer and main electrical equipment, and event The failure cause of barrier transformator differentiates and comprehensive diagnos.All detection modules are carried out into portability module design, detection module quilt Integrated manipulator is accessed, all of detection module, controller, power supply and supplementary module are all integrated on the mobile device, formed Complete motorised systems, can truly judge distribution transformer crucial insulation resistance, industrial frequency withstand voltage, dielectric loss, and auxiliary Other test events such as data such as no-load voltage ratio, polarization index, open circuit loss are helped, implements condition diagnosing, it is ensured that safe operation, is monitoring Or transformator is built there is provided reliable data.Portable moduleization design can easily carry out disassembly and assembly, be easy to censorship And maintenance, integrated control and management can complete omnibearing test report, carry out unified data management and diagnostic analysiss, can To improve efficiency, level and the quality of electrical test comprehensively, mitigate instrument handling workload heavy in process of the test, it is to avoid A large amount of back works that are time-consuming, laborious, relying on external equipment, simplify flow process, shorten the time, also reduce testing equipment many Many risks for causing equipment impaired in handling process, improve motility and the mobility of field test work, while utilizing Easily operate, rapidly failure transformer is diagnosed, judge whether equipment working state is normal, finds in time exactly Equipment deficiency and hidden danger, and field personnel can also be reduced while several times improve work efficiency, labor intensity is reduced, Improve experimental condition, contribute to the development of power system field test technology and solve between the expansion of undermanned and production task Contradiction, so as to ensure the safe and reliable operation of equipment, largely improve the reliability and technology pipe of transformer station high-voltage side bus Reason level, can it is safe, motor-driven, quick, effectively complete correlation test project, realize converting equipment field test " it is intensive, The change of digitized, intellectuality, motorization ".
Although present disclosure has been made to be discussed in detail by above preferred embodiment, but it should be appreciated that above-mentioned Description is not considered as limitation of the present invention.After those skilled in the art have read the above, for the present invention's Various modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.

Claims (10)

1. a kind of distribution transformer comprehensive detection device, it is characterised in that include:
Mobile device, the portable mobile of its achievable distribution transformer comprehensive detection device;
Detection module, it is arranged on the mobile device, for doing various detections to distribution transformer;
Integrated wiring modules, it is arranged on the mobile device, and is electrically connected with detection module, for realizing the line to detection module Road integrated access;
Integrated manipulator, it is arranged on the mobile device, and is electrically connected with integrated wiring modules, for being realized using detection module Automatic test to distribution transformer;
Central controller, it is arranged on the mobile device, and is electrically connected with integrated manipulator, for realizing dividing test data Analysis and storage.
2. distribution transformer comprehensive detection device as claimed in claim 1, it is characterised in that described detection module is included:
No-load transformer load characteristic test module, it accesses integrated manipulator by integrated wiring modules, for measuring distribution The no-load current of transformator, open circuit loss, short-circuit voltage and short circuit loss;
Transformer noload losses characteristic test module, it accesses integrated manipulator by integrated wiring modules, for distribution transformer The capacity check of device;
Transformer impedance drop characteristic test module, it accesses integrated manipulator by integrated wiring modules, for main transformer pressure Device carries out low-voltage short-circuit impedance measurement;
Transformer alternating voltage endurance test module, it accesses integrated manipulator by integrated wiring modules, for measuring distribution The maximum pressure voltage of transformator;
Transformer Winding D.C. resistance detection module, it accesses integrated manipulator by integrated wiring modules, for measuring distribution The winding D.C. resistance of transformator;
Insulation Resistance Tester, it accesses integrated manipulator by integrated wiring modules, for measuring the insulation of distribution transformer Resistance, absorptance and polarization index;
Dielectric loss tangent tester, it accesses integrated manipulator by integrated wiring modules, for measuring distribution transformer Dielectric loss angle;
Load switch of transformer tester, it accesses integrated manipulator by integrated wiring modules, for measuring and analyzing distribution On-load tap changers of transformers electricity function index.
3. distribution transformer comprehensive detection device as claimed in claim 2, it is characterised in that described distribution transformer synthesis Detection means is also included:Power supply, it is arranged on the mobile device, and is electrically connected with integrated manipulator and integrated wiring modules, is used In offer electric power.
4. distribution transformer comprehensive detection device as claimed in claim 3, it is characterised in that described distribution transformer synthesis Detection means is also included:UPS back-up sources, it is arranged on the mobile device, and is electrically connected with integrated manipulator and power supply, is used for Back-up electric power is provided.
5. distribution transformer comprehensive detection device as claimed in claim 4, it is characterised in that described distribution transformer synthesis Detection means is also included:Environment monitoring module, it is arranged on the mobile device, and is electrically connected with integrated manipulator, for monitoring Ambient temperature and humidity data.
6. distribution transformer comprehensive detection device as claimed in claim 5, it is characterised in that described distribution transformer synthesis Detection means is also included:Security protection module, it is arranged on the mobile device, and is electrically connected with integrated manipulator, for guaranteeing Distribution transformer comprehensive detection device safe operation.
7. distribution transformer comprehensive detection device as claimed in claim 2, it is characterised in that the institute in described detection module There are test module and tester all to design using portable moduleization.
8. distribution transformer comprehensive detection device as claimed in claim 1, it is characterised in that described integrated wiring modules tool There are multiple expansible connection jaws.
9. distribution transformer comprehensive detection device as claimed in claim 1, it is characterised in that on described integrated manipulator plus Integrated control software is carried, the full-automatic testing to distribution transformer is realized.
10. distribution transformer comprehensive detection device as claimed in claim 1, it is characterised in that described central controller is adopted Use computer.
CN201611139449.1A 2016-12-12 2016-12-12 Distribution transformer integrated detection device Pending CN106597158A (en)

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CN110398655A (en) * 2019-08-27 2019-11-01 国网山东省电力公司滨州供电公司 A kind of area high overload transformer testing device and method
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Application publication date: 20170426