CN102081151A - Full-automatic integral detection device for transformer test set - Google Patents
Full-automatic integral detection device for transformer test set Download PDFInfo
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Abstract
The invention discloses a full-automatic integral detection device for a transformer test set, which comprises a linear programmable power supply, a voltage and current selection and range switcher, a voltage transformer and a current transformer, wherein the voltage and current selection and range switcher is divided into two paths directly or after current-voltage conversion, one path sequentially passes through an in-phase power amplifier and a programmable induction voltage divider, and the other path sequentially passes through an orthogonal phaser, an orthogonal power amplifier and the programmable induction voltage divider; two paths of signals are synthesized by a signal synthesis unit and then connected to a power amplifier; and the power amplifier is divided into two paths, one path sequentially passes through an output range switcher, a differential output voltage and voltage and current selection output for output, and the other path sequentially passes through a voltage-current converter, the output range switcher, a differential output current and the voltage and current selection output for output. The full-automatic integral detection device for the transformer test set is combined with a computer to automatically finish detecting the transformer test set in a relatively shorter time without manual intervention.
Description
Technical field
The present invention relates to the full-automatic whole calibrating installation of a kind of mutual-inductor tester, belong to electric power and quality technical supervision industry.
Background technology
Domestic nearly thousands of mutual-inductor testers are in user mode now, and according to " measurement Law detailed rules for the implementation " requirement, these mutual-inductor testers must the implementation cycle calibrating.
At present, when examining and determine, need other utility appliance just can require numerous mutual-inductor testers are examined and determine according to rules by the standard verification of domestic mutual-inductor tester.The lot of data calibration operation is finished by manual operation fully, such as, after wiring finishes, the output of manual shift mutual inductor tester whole checking device, record mutual-inductor tester video data, and can only the video data of tested mutual-inductor tester and the setting value of mutual inductor tester whole checking device standard be compared with manual type, calculate error, the revision of the conventionization is whole, and process errors data and artificial establishment calibration certificate judge whether mutual-inductor tester is qualified.Requirement according to JJG169-93 " mutual-inductor tester vertification regulation " removes to examine and determine a mutual-inductor tester, to finally providing " calibration certificate ", a skilled testing person approximately wants the time of half a day, the calibration operation amount is big, efficient is low and easily artificial unconscious makeing mistakes, and is unfavorable for that the measurement verification personnel free from the loaded down with trivial details duplication of labour.
Along with China's rapid economy development, increasing to the demand of electric energy.Each province Utilities Electric Co. and metrological testing technology research institute deposit the transmission of quantity value of carrying on a shoulder pole subordinate unit and the task of calibrating first that calls for bid, and workload is very big, so research and development global function, intelligentized mutual inductor tester whole checking device are inexorable trends.For these reasons, obtain these creative ideas finally through long research of author and practice.
Summary of the invention
Technical matters to be solved by this invention is, provides a kind of mutual-inductor tester full-automatic whole calibrating installation, and it can overcome above shortcoming.
For solving the problems of the technologies described above, the technical solution used in the present invention is: the full-automatic whole calibrating installation of a kind of mutual-inductor tester, comprise: linear programmable power supply, the electric current and voltage that is connected with described linear programmable power supply is selected and range switches, select to switch the voltage transformer (VT) summation current transformer that is connected with described electric current and voltage with range, described electric current and voltage is selected and the range switching directly or after the conversion of process current/voltage is divided into two branch roads, wherein one the tunnel pass through homophase power amplifier and program control induced voltage voltage divider successively, the quadrature phase shift is passed through on another road successively, quadrature power amplifier and program control induced voltage voltage divider, two paths of signals is connected to power amplification after synthesizing through signal synthesis unit, power amplification is divided into two branch roads, one the tunnel switches through output range successively, elementary errors output voltage and electric current and voltage are selected the output of output back, and another road is successively through the electric current and voltage conversion, output range switches, elementary errors output current and electric current and voltage are selected the output of output back; In addition, also comprise: CPLD, described CPLD is controlled entire circuit by control module, described CPLD is connected to digital signal processor, described digital signal processor links to each other with computing machine by communication interface, described digital signal processor also is connected with display screen, and signal gathering unit links to each other with computing machine through CPLD, digital signal processor, communication interface successively.
Described computing machine is equipped with checking routine, and it is controlled checking procedure, and the check results that receives is calculated and judged, puts in order, preserves and provide probation redport automatically.
The full-automatic whole calibrating installation of described mutual-inductor tester also comprises: digital signal processor, Direct Digital Synthesizer, amplifier amplification and filtering circuit, D/A conversion chip; Wherein, digital signal processor is controlled Direct Digital Synthesizer, insert the benchmark input end of D/A conversion chip behind the signal output process amplifier amplification of Direct Digital Synthesizer and the filtering circuit, the signal after the conversion of D/A conversion chip outputs to above-mentioned linear programmable power supply.
The linear programmable power supply inside of the full-automatic whole calibrating installation of described mutual-inductor tester comprises crystal oscillator unit, frequency unit, phase locking frequency multiplying unit, waveform synthesis unit, program control amplifying unit, the power amplifier unit of series connection successively.
The voltage signal output end of the full-automatic whole calibrating installation of described mutual-inductor tester is provided with reometer, when voltage signal output is raised to 100V, promptly the work additional capacity in loop of the product that digital signal processor calculates operating voltage 100V and reometer reading.
The current signal output end of the full-automatic whole calibrating installation of described mutual-inductor tester is provided with voltage table, and the product that digital signal processor calculates current signal and voltage table reading is the additional capacity of working current loop.
The full-automatic whole calibrating installation of described mutual-inductor tester adopts 14 D/A conversion chips.
It is controller local area network's bus interface that the communication interface of the full-automatic whole calibrating installation of described mutual-inductor tester adopts CAN.
On the computing machine of the full-automatic whole calibrating installation of described mutual-inductor tester checking routine is housed, checking routine adopts standard communications protocol form to carry out transmission of Information, and included field is followed successively by in this standard communications protocol form: sign, instruction, dial gauge, ratio, angular difference, CRC check.
Advantage of the present invention is, preestablishing the calibrating rule by computing machine also measures mutual-inductor tester automatically, use the verification process of this calibration method and standard set-up to need not the calibration operation that manual intervention can be finished mutual-inductor tester in the short period of time automatically, simultaneously, mutual-inductor tester calibrating software is on top of being examined and determine on the service basic, realize virtual artificial operational design, functions such as self-defined calibration certificate output.
Description of drawings
Fig. 1 is the circuit theory diagrams of the full-automatic whole calibrating installation of mutual-inductor tester of the present invention;
Fig. 2 is the circuit theory diagrams of the input signal generation device of the related linear programmable power supply of the full-automatic whole calibrating installation of mutual-inductor tester of the present invention;
Wiring schematic diagram when Fig. 3 examines and determine mutual-inductor tester for the full-automatic whole calibrating installation of mutual-inductor tester of the present invention;
Fig. 4 is the related employed standard communications protocol of the checking routine form of the full-automatic whole calibrating installation of mutual-inductor tester of the present invention;
Fig. 5 is the software flow pattern of the related checking routine of the full-automatic whole calibrating installation of mutual-inductor tester of the present invention;
Part symbol description in the accompanying drawing: program control IVD group-program control induced voltage voltage divider; CPLD-CPLD; DSP-digital signal processor; V/I-voltage/current; I/V-current/voltage; CRC-CRC; DDS-Direct Digital Synthesizer.
Embodiment
For further disclosing technical scheme of the present invention, be described with reference to the accompanying drawings embodiments of the present invention now:
Describe hardware configuration of the present invention and interconnected relationship in detail below in conjunction with Fig. 1, Fig. 2, Fig. 3.
The full-automatic whole calibrating installation of mutual-inductor tester of the present invention comprises: linear programmable power supply 1; The electric current and voltage that is connected with described linear programmable power supply 1 is selected and range switches 4; Select to switch 4 voltage transformer (VT) that are connected, 2 summation current transformers 3 with described electric current and voltage with range; Described electric current and voltage is selected and range switching 4 directly or after the process current/voltage conversion 5 is divided into two branch roads, wherein one the tunnel pass through homophase power amplifier 6 and program control induced voltage voltage divider 7 successively, another road is passed through quadrature phase shift 8, quadrature power amplifier 9 and program control induced voltage voltage divider 71 successively, and two paths of signals is connected to power amplification 11 after synthesizing through signal synthesis unit 10; Power amplification 11 is divided into two branch roads, one the tunnel successively through output range switch 14, elementary errors output voltage 13 and electric current and voltage select output 16 back outputs, another road successively through electric current and voltage conversion 12, output range switch 14, elementary errors output current 15 and electric current and voltage select output 16 back outputs; In addition, also comprise: CPLD 19; Described CPLD 19 is controlled by 17 pairs of entire circuit of control module; Described CPLD 19 is connected to digital signal processor 21; Described digital signal processor 21 is controller local area network's bus interface by communication interface 22 such as adopting CAN, links to each other with computing machine; Described digital signal processor 21 also is connected with display screen 20; Signal gathering unit 18 links to each other with computing machine through CPLD 19, digital signal processor 21, communication interface 22 successively.
The full-automatic whole calibrating installation of described mutual-inductor tester also comprises: digital signal processor 101, Direct Digital Synthesizer 102, amplifier are amplified and 103,14 D/A conversion chips 104 of filtering circuit; Wherein, 101 pairs of Direct Digital Synthesizers 102 of digital signal processor are controlled, the signal output of Direct Digital Synthesizer 102 is through the benchmark input end of amplifier amplification and filtering circuit 103 back access D/A conversion chips 104, and the signal after 104 conversions of D/A conversion chip outputs to above-mentioned linear programmable power supply 1.
Above-mentioned linear programmable power supply 1 inside can be connected in series successively by crystal oscillator unit, frequency unit, phase locking frequency multiplying unit, waveform synthesis unit, program control amplifying unit, power amplifier unit and form.
The voltage signal output end of the full-automatic whole calibrating installation of this mutual-inductor tester can be provided with reometer, as Fig. 3, is to have designed a reometer between the output of voltage transformer (VT) 2 output terminals and the binding post a terminal in the inside of the full-automatic whole calibrating installation of mutual-inductor tester in operating voltage output, when the operating voltage output of the full-automatic whole calibrating installation of mutual-inductor tester was raised to 100V, the product that DSP digital signal processor 21 calculates operating voltage 100V and this reometer reading was the additional capacity in voltage power supply loop.The situation in current work loop is similar to the voltage power supply loop, at T
OAnd T
XBetween be provided with voltage table, the product that DSP digital signal processor 21 calculates working current and voltage table reading is the additional capacity in current work loop.The method of testing in the method for testing of difference loop additional capacity and above-mentioned work loop is similar, does not repeat them here.The additional capacity in difference loop must not surpass 1/15 of work loop rated capacity according to the regulation of rules, and maximum must not surpass 0.25VA.
The course of work of the full-automatic whole calibrating installation of mutual-inductor tester of the present invention below is described.
CPLD (CPLD) 19 has a plurality of pins that are programmed for bus or I/O mouth, and we come to programme according to above-mentioned the needs by corresponding composing software (for example ISE, QUARTUS); Select and range switches 4, output 16 is selected in I/V conversion 5, V/I conversion 12, program control IVD group 7, program control IVD group 71, elementary errors signal etc. all is that I/O port by CPLD CPLD 19 comes the pilot relay group to open/close state at aforesaid V/I, realize the switching of signal and gear, listed project in the control module 17 among concrete range of control such as Fig. 1; CPLD (CPLD) 19 directly is connected with digital signal processor 21, and the CAN communication interface 22 that digital signal processor 21 carries by itself is connected with computing machine.Computing machine issues communication instruction one by one according to the calibrating point of the regular defined of default calibrating, and the full-automatic whole calibrating installation of control mutual-inductor tester is by the calibrating point output of default calibrating rule predetermining; After the instruction that the intelligent whole standard verification apparatus responsive computer of mutual-inductor tester sends, according to output valve linear adjustment programmable power supply 1 output of instruction regulation, and transmission is instructed to mutual-inductor tester; Behind the mutual-inductor tester response instruction, working signal and elementary errors signal gathering unit 18 begin to gather the signal of the full-automatic whole calibrating installation output of mutual-inductor tester, calculate dial gauge, ratio, the angle difference signal of the full-automatic whole calibrating installation output of mutual-inductor tester, tested mutual-inductor tester is sent to computing machine according to standard communications protocol form with calculation result data simultaneously.After the data processing such as computing machine receives, calculating, the revision of the conventionization are whole, on special software, show measurement data and judged result, select to preserve or provide calibration certificate as requested.
Describing software involved in the present invention in detail below in conjunction with Fig. 4, Fig. 5 is checking routine.
Enter after the software interface, enter step (50) calibrating beginning; Then enter step (51) and can select the PT(mutual induction of voltage according to the project of calibrating) test, the mutual inductance of CT(electric current) test, impedance experiments, four kinds of functions of admittance test one of them, such as selecting the PT calibrating, click after the START button, PC sends out instruction and data a string to the full-automatic whole calibrating installation of mutual-inductor tester by communication interface (22) circuit; Then enter the full-automatic whole calibrating installation of step (52) mutual-inductor tester after receiving instruction and data, the verification of advanced line data, then enter the automatic discriminant alarm reset process of fault (60) as the verification failure, the full-automatic whole calibrating installation of mutual-inductor tester returns data and resends and instruct PC, PC will resend instruction and data after receiving and retransmitting instruction, till verification is passed through; Verification is by then sending whole calibrating installation calibrating instruction (53) to the full-automatic whole calibrating installation of mutual-inductor tester and enter step (54), and the full-automatic whole calibrating installation of mutual-inductor tester is exported corresponding dial gauge and ratio, angle difference signal according to whole calibrating installation calibrating instruction (53); Then send mutual-inductor tester and measure instruction (55) to tested mutual-inductor tester and enter step (56), mutual-inductor tester receives that instruction and data also is later on to carry out verification earlier, returns according to check results then and retransmits instruction or measure instruction (55) to measuring from dial gauge, ratio, the angle difference signal of the full-automatic whole calibrating installation output of mutual-inductor tester according to mutual-inductor tester; Then enter step (57) and carry out data processing; Then enter and examine and determine the step (58) that finishes; Measure the end back and upload measurement result to upper PC automatically by step (59).
Instruction, exchanges data between computing machine, the full-automatic whole calibrating installation of mutual-inductor tester and the mutual-inductor tester is the basis of realizing the calibrating of mutual-inductor tester intelligence, and it is quite important to choose suitable communications protocol form.Below in conjunction with Fig. 4 the employed standard communications protocol of checking routine involved in the present invention form is described.
Identification field: the data volume scope of representative is 0～0XFF, and dial gauge * 100 changes whole, and ratio * 10000000 changes whole, and angular difference * 10000 changes whole (branch), and angular difference * 10000000 changes whole (radian).The implication of sign: in order to distinguish full-automatic whole calibrating installation of mutual-inductor tester and mutual-inductor tester, computing machine need identify two devices at this, i.e. the access object of computing machine sign.Definition: FF is the full-automatic whole calibrating installation of mutual-inductor tester of visit mutual-inductor tester, and 0～FE is the visit mutual-inductor tester.
Instruction field: the data volume scope of representative is 0～0xFF, and 0～0xFF instruction satisfied following expansion fully and reserved needs, and the intelligent whole standard verification apparatus output of setting mutual-inductor tester at present is provided with (returning) sign indicating number: EE; Mutual-inductor tester data transmission sign indicating number: DD.(during the no datat transmission, the data bit zero padding).
The dial gauge field: the indication range of representative is 1%～200%; Because it is positive and negative that dial gauge does not have, data area 0～0XFFFF(0～65536).With the dial gauge scope: 1.00～200.00 multiply by 100, then are: 100～20000, and in the protocol data scope.
Ratio field (being in-phase component (%) index): 0.00001～100; There is positive and negative branch in in-phase component, data area 0～0XFFFFFFFF(-4294967295～4294967295), with the in-phase component scope: 0.00001～100.0000 multiply by 100000 in-phase component scopes is: 1～10000000, and in the protocol data scope.
Than angle field (being quadrature component (branch) index): 0.0001～999.9; There is positive and negative branch in quadrature component, data area 0～0XFFFFFFFF(-4294967295～4294967295), with the quadrature component scope: 0.0001～999.900 multiply by 10000: 1～9999000, in the protocol data scope.
Crc field: be used to deposit CRC.
More than, the basic ideas and basic principles of the present invention have been set forth by description of listed embodiment.But the present invention never is limited to above-mentioned listed embodiment, and every equivalent variations, improvement and deliberately of inferior quality behavior of doing based on technical scheme of the present invention of change all should belong to protection scope of the present invention.
Claims (9)
1. full-automatic whole calibrating installation of mutual-inductor tester, it is characterized in that, comprise: linear programmable power supply (1), the electric current and voltage that is connected with described linear programmable power supply (1) is selected and range switches (4), select to switch voltage transformer (VT) (2) summation current transformer (3) that (4) are connected with described electric current and voltage with range, described electric current and voltage is selected and range switching (4) directly or after the process current/voltage conversion (5) is divided into two branch roads, wherein one the tunnel pass through homophase power amplifier (6) and program control induced voltage voltage divider (7) successively, quadrature phase shift (8) is passed through on another road successively, quadrature power amplifier (9) and program control induced voltage voltage divider (71), two paths of signals is connected to power amplification unit (11) after synthesizing through signal synthesis unit (10), power amplification unit (11) is divided into two branch roads, one the tunnel switches (14) through output range successively, elementary errors output voltage (13) and electric current and voltage are selected the output of output (16) back, and another road is successively through electric current and voltage conversion (12), output range switches (14), elementary errors output current (15) and electric current and voltage are selected the output of output (16) back; Also comprise: CPLD (19), described CPLD (19) is controlled entire circuit by control module (17), described CPLD (19) is connected to digital signal processor (21), described digital signal processor (21) links to each other with computing machine by communication interface (22), described digital signal processor (21) also is connected with display screen (20), in addition, signal gathering unit (18) is passed through CPLD (19) successively, digital signal processor (21), communication interface (22) links to each other with computing machine.
2. the full-automatic whole calibrating installation of mutual-inductor tester according to claim 1, it is characterized in that described computing machine is equipped with checking routine, it is controlled checking procedure, and the check results that receives calculated and judge, put in order, preserve and provide probation redport automatically.
3. the full-automatic whole calibrating installation of mutual-inductor tester according to claim 1 and 2, it is characterized in that, also comprise: digital signal processor (101), Direct Digital Synthesizer (102), amplifier amplification and filtering circuit (103), D/A conversion chip (104); Wherein, digital signal processor (101) is controlled Direct Digital Synthesizer (102), the signal output of Direct Digital Synthesizer (102) is through the benchmark input end of amplifier amplification and filtering circuit (103) back access D/A conversion chip (104), and the signal after D/A conversion chip (104) conversion outputs to above-mentioned linear programmable power supply (1).
4. the full-automatic whole calibrating installation of mutual-inductor tester according to claim 1, it is characterized in that linear programmable power supply (1) inside comprises crystal oscillator unit, frequency unit, phase locking frequency multiplying unit, waveform synthesis unit, program control amplifying unit, the power amplifier unit of series connection successively.
5. the full-automatic whole calibrating installation of mutual-inductor tester according to claim 1, it is characterized in that, the voltage signal output end of the full-automatic whole calibrating installation of this mutual-inductor tester is provided with reometer, when voltage signal output was raised to 100V, the product that digital signal processor (21) calculates operating voltage 100V and reometer reading was the additional capacity in voltage power supply loop.
6. the full-automatic whole calibrating installation of mutual-inductor tester according to claim 1 or 5, it is characterized in that, the current signal output end of the full-automatic whole calibrating installation of this mutual-inductor tester is provided with voltage table, and the product that digital signal processor (21) calculates current signal and voltage table reading is the additional capacity in current work loop.
7. the full-automatic whole calibrating installation of mutual-inductor tester according to claim 3 is characterized in that, the full-automatic whole calibrating installation of this mutual-inductor tester adopts 14 D/A conversion chips (104).
8. the full-automatic whole calibrating installation of mutual-inductor tester according to claim 1 is characterized in that, it is controller local area network's bus interface that communication interface (22) adopts CAN.
9. the full-automatic whole calibrating installation of mutual-inductor tester according to claim 2, it is characterized in that, described checking routine adopts standard communications protocol form to carry out transmission of Information, and the field that is comprised in this standard communications protocol form is followed successively by: sign, instruction, dial gauge, ratio, angular difference, CRC check.
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| CN104483648A (en) * | 2014-12-31 | 2015-04-01 | 国家电网公司 | On-site calibration system used for GIS station voltage transformer errors |
| CN106483489A (en) * | 2016-11-17 | 2017-03-08 | 云南电网有限责任公司电力科学研究院 | The assay device of the mutual-inductor tester based on detection feedback |
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| CN107748344A (en) * | 2017-09-06 | 2018-03-02 | 国家电网公司 | Full-automatic mutual inductor tester whole checking device and calibration method |
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