CN105891664A - Multi-path analog loop and polarity calibration instrument - Google Patents
Multi-path analog loop and polarity calibration instrument Download PDFInfo
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- CN105891664A CN105891664A CN201610413849.0A CN201610413849A CN105891664A CN 105891664 A CN105891664 A CN 105891664A CN 201610413849 A CN201610413849 A CN 201610413849A CN 105891664 A CN105891664 A CN 105891664A
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
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Abstract
The invention relates to a multi-path analog loop and polarity calibration instrument. The multi-path analog loop and polarity calibration instrument consists of a test main machine and a wireless extension, and is characterized in that the test main machine is provided with a main machine test wire, and the wireless extension is provided with a plurality of extension test wires; the main machine test wire of the test main machine is connected to the input end and the output end of a primary coil of a mutual inductor, each extension test wire of the wireless extension is respectively connected to a secondary loop cable of the mutual inductor to be introduced into each coil at the inlet of a measurement and control device, and the wireless extension and the test main machine are in wireless signal connection. The multi-path analog loop and polarity calibration instrument has the advantages of high integration level, convenient portability, simple operation, one-man operation and time and labor saving during testing, simultaneous inspection and testing for a plurality of coil loops can be completed at a time, calibration can be completed for the completeness of a multi-path analog loop and the correctness of polarity at a time, errors caused by wiring and transitional information contact for different persons are avoided, and safe operation of power supply units is guaranteed.
Description
Technical field
The present invention relates to a kind of polarity tester, particularly a kind of multi-analog loop polarity tester, be applied to the transformer and distribution station of the various wiring of electric railway, occasion such as local electric power system, industrial enterprise etc..
Background technology
Voltage transformer (PT) summation current transformer (CT) is the electrical equipment that power system is important, and it carries the function that the isolation between high and low pressure system and high pressure amount are changed to low pressure amount.Mutual inductor polarity mistake, the problem such as easily occur improper tripping operation, measurement amount inaccurate in equipment runs；Therefore the correctness of its polarity and secondary connection, to the protection of system, measure, the normal work of the equipment such as supervision has extremely important meaning.
When newly installed, overhaul PT, CT or replacing PT, CT secondary cable, all kinds of protection, utilize the correctness of polarity test method inspection PT, CT wiring, be the requisite working procedure of relay protection staff.
In the anti-test of daily spring, although code does not require to test the polarity of transformer, but the test period of transformer insulation resistance is 1-3, and when testing Secondary Winding to a winding and ground insulation, need to remove PT, CT secondary lead wires, because its Secondary Winding mostly is 2-4 coil, need to arouse attention especially when recovering, the most easily cause lead-in wire wrong, therefore in the case of holding the most completely, loop integrity once to be tested after having recovered between secondary measure and control device by transformer secondary line from transformer.
In sum, transformer is newly installed, overhaul or when changing transformer secondary cable, all kinds of protection, or after the anti-test of daily spring completes, needs the integrity to multi-analog loop, the correctness of polarity to verify.
And it is current, scene is used mostly mutual-inductor tester and completes excitation property, ratio and angular difference, the test of polarity, but the purpose of this test is to confirm transformer bulk properties, the Correctness checking of polarity, coordinate inspection helpless for the phase place between secondary connecting line and voltage, current-mode analog quantity；Additionally, also has the correctness of a kind of traditional artificial " point-polarity " polarity test method inspection PT, CT wiring, this artificial " point-polarity " polarity test method to be at least equipped with 2 groups of 4 people, and need to link up in advance before testing, in test in two groups of communication processes must also term accurate, the error of any point, it is possible to cause the mistake of polarity, runs to equipment and brings immeasurable impact.It is more than the deficiencies in the prior art.
Summary of the invention
It is an object of the invention to: a kind of multi-analog loop polarity tester is provided, this polarity tester integrated level is high, easy to carry, simple to operate, only need one man operation, time saving and energy saving during test, check while once can completing multiple wire loop, test, the correctness of the integrity in multi-analog loop, polarity disposably can be completed verification, avoid different personnel's wiring and the error that message context brings is transmitted in contact, ensure the safe operation of power supply unit.
The purpose of the present invention can be realized by following technical proposals:
This multi-analog loop polarity tester, is made up of test main frame and radio extension, it is characterized in that: have host test line on test main frame, radio extension has some extension set p-wires；The host test line of test main frame is connected to input and the outfan of transformer primary winding, each extension set p-wire of radio extension is connected to transformer secondary circuit cable respectively and introduces each coil of measure and control device porch, connects for wireless signal between radio extension and test main frame.
Host test line of the present invention is by flowing mutual p-wire and pressing mutual p-wire to form, the concrete polarity chron in test current transformer body and primary winding thereof extremely each secondary coil loop, the mutual p-wire that flows of test main frame is connected to input and the outfan of current transformer primary winding, and each extension set p-wire of radio extension is connected to secondary loop of mutual inductor cable respectively and introduces each coil of measure and control device porch；The concrete polarity chron in test voltage transformer body and primary winding thereof extremely each secondary coil loop, the mutual p-wire of pressing of test main frame is connected to input and the outfan of voltage transformer primary winding, and each extension set p-wire of radio extension is connected to Secondary Circuit of Potential Transformer cable respectively and introduces each coil of measure and control device porch.
Test main frame of the present invention is mainly made up of main frame MCU system, host power supply, transformer discharge circuit, main frame wireless transmission circuit and liquid crystal display, main frame MCU system is for realizing the testing and control of current transformer, voltage transformer, and be analyzed calculating to the data that radio extension transmission is next, determine the positive and negative polarity of current transformer, voltage transformer, and error message is got rid of；Host power supply is for providing 12V DC voltage 12V+, 5V DC voltage 5V+, 3.3V DC voltage VCC3.3 and 12V DC voltage 12vl for test host computer system；The primary winding of current transformer is discharged by transformer discharge circuit for realization, charges voltage transformer primary winding, and when electric current reaches some levels, automatically disconnects charge circuit；Main frame wireless transmission circuit is for realizing the wireless telecommunications between test main frame and radio extension；Liquid crystal display is for showing the test result of current transformer, voltage transformer；Described radio extension is mainly made up of extension set MCU system, Exgt Bat extension battery, sampling hold circuit, polarity display circuit and extension set wireless transmission circuit, extension set MCU system is for controlling the transmitting-receiving of radio receiving transmitting module, gather the actuating signal of sampling hold circuit, form data and be sent to test main frame；Exgt Bat extension battery is for providing 12V DC voltage 12vl and 3.3V DC voltage VCC for radio extension system, and provides ground connection tapping block and power supply indicator binding post for radio extension system；Sampling hold circuit, for gathering the pulse signal of transformer secondary coil loop generation and keeping, gathers for extension set MCU system, and forms data；Polarity display circuit, for indicating the adding of institute survey time road, subtractive polarity, compares, to guarantee the accuracy of test result with testing main frame simultaneously as auxiliary display；Extension set wireless transmission circuit is for realizing the wireless telecommunications between radio extension and test main frame.
There are embedded microcontroller U1, main frame crystal oscillating circuit and host reset circuit in main frame MCU system of the present invention, in main frame crystal oscillating circuit, have crystal oscillator Y1 and electric capacity C1 and C2, in host reset circuit, have reset resistor Rfw and binding post FW；Tapping block CON1, CON2, CON3 and CON8 is had in host power supply；Tapping block CON6 and CON7, resistance R3～R6, CT discharge loop and PT discharge loop is had in transformer discharge circuit, there are relay K 1, tapping block CON4, polarized electric capacity C3, diode D1, audion Q1 and resistance R1 in CT discharge loop, in PT discharge loop, have relay K 2, tapping block CON5, diode D2, audion Q2 and resistance R2；Radio receiving transmitting module interface J2 is had in main frame wireless transmission circuit；Liquid crystal display interface J1 is had in liquid crystal display；Embedded microcontroller U12, extension set crystal oscillating circuit, extension set reset circuit, relay K 12, diode D12, audion Q12 and resistance R0 is had in extension set MCU system, there is crystal oscillator Y12 and electric capacity C12 and C22 in extension set crystal oscillating circuit, in extension set reset circuit, have reset resistor Rfw2 and binding post FW2；Tapping block TS3.3V, TS12V, TS-GND1 and TS-GND2, binding post J-LED and resistance Rled is had in Exgt Bat extension battery；Relay K 10 and K3～K9, diode D10, D3～D9, D21, D31, D41, D51, D61, D71, D81, D91, D22, D32, D42, D52, D62, D72, D82 and D92, audion Q10 and Q3～Q9, adjustable resistance R21, R31, R41, R51, R61, R71, R81 and R91 and tapping block TS1, TS2, TS3 and TS4 is had in sampling hold circuit；Resistance R22, R32, R42, R52, R62, R72, R82 and R92 and LED light positive terminal LED+ is had in polarity display circuit；Radio receiving transmitting module interface J22 is had in extension set wireless transmission circuit；
Its circuit connecting relation is: in test main frame, the binding post FW of main frame MCU system is connected to reset key；In host power supply, 1st and the 2nd pin of tapping block CON1 connects 12V DC voltage 12V+ and ground respectively, 1st and the 2nd pin of tapping block CON2 connects 5V DC voltage 5V+ and ground respectively, 1st and the 2nd pin of tapping block CON3 connects 3.3V DC voltage VCC3.3 and ground respectively, and the 1st and the 2nd pin of tapping block CON8 connects 12V DC voltage 12vl and ground respectively；nullIn transformer discharge circuit，1st pin of tapping block CON6 connects one end of resistance R3 and R4，2nd pin of tapping block CON6 connects 5V DC voltage 5V+，The other end ground connection of resistance R4，1st pin of tapping block CON7 connects one end of resistance R5 and R6，2nd pin of tapping block CON7 connects 5V DC voltage 5V+，The other end ground connection of resistance R6，It is connected to flow mutually/pressure on tapping block CON6 and tests selection key mutually，It is connected on tapping block CON7 start/confirm button，In CT discharge loop，The normally opened contact of relay K 1 switch and normally-closed contact connect the 1st pin and the 12V DC voltage 12V+ of tapping block CON4 respectively，The common port of relay K 1 switch connects the positive pole of polarized electric capacity C3，2nd pin of tapping block CON4 and the equal ground connection of negative pole of polarized electric capacity C3，The two ends of relay K 1 coil connect positive pole and the negative pole of diode D1 respectively，The negative pole of diode D1 connects 12V DC voltage 12V+，The colelctor electrode of the positive pole connecting triode Q1 of diode D1，The grounded emitter of audion Q1，The base stage of audion Q1 connects one end of resistance R1，It is connected on tapping block CON4 flow mutual p-wire，In PT discharge loop，The normally opened contact of relay K 2 switch connects the 1st pin of tapping block CON5，The common port of relay K 2 switch connects 12V DC voltage 12vl，The 2nd pin ground connection of tapping block CON5，The two ends of relay K 2 coil connect positive pole and the negative pole of diode D2 respectively，The negative pole of diode D2 connects 12V DC voltage 12V+，The colelctor electrode of the positive pole connecting triode Q2 of diode D2，The grounded emitter of audion Q2，The base stage of audion Q2 connects one end of resistance R2，It is connected on tapping block CON5 press mutual p-wire；Between main frame MCU system and transformer discharge circuit, the other end of resistance R3 is connected to the 21st pin of embedded microcontroller U1, the other end of resistance R5 is connected to the 22nd pin of embedded microcontroller U1, the resistance R1 other end of CT discharge loop is connected to the 19th pin of embedded microcontroller U1, and the resistance R2 other end of PT discharge loop is connected to the 20th pin of embedded microcontroller U1；Between main frame MCU system and main frame wireless transmission circuit, 3rd～the 8th pin of radio receiving transmitting module interface J2 is connected respectively to the 17th of embedded microcontroller U1 the, the 16th, the 24th, the 18th, the 15th and the 23rd pin, equipped with radio receiving transmitting module on radio receiving transmitting module interface J2；Between main frame MCU system and liquid crystal display, the 5th～the 14th pin of liquid crystal display interface J1 is connected respectively to the 33rd～the 40th, the 2nd and the 3rd pin of embedded microcontroller U1, equipped with liquid crystal display on liquid crystal display interface J1；
In radio extension, in Exgt Bat extension battery, 1st and the 2nd pin of tapping block TS3.3V connects 3.3V DC voltage VCC and ground respectively, 1st and the 2nd pin of tapping block TS12V connects 12V DC voltage 12vl and ground respectively, 1st and the 2nd pin of tapping block TS-GND1 and the 1st and the 2nd equal ground connection of pin of tapping block TS-GND2,1st pin of binding post J-LED connects one end of resistance Rled, the other end of resistance Rled connects 12V DC voltage 12vl, the 2nd pin ground connection of binding post J-LED, binding post J-LED is connected to LED light；In extension set MCU system, it is connected to reset key on binding post FW2, the common port of relay K 12 switch connects the negative pole of diode D12, the normally opened contact of relay K 12 switch draws 12V DC voltage 12V+, the two ends of relay K 12 coil connect positive pole and the negative pole of diode D12 respectively, the negative pole of diode D12 connects 12V DC voltage 12vl, the colelctor electrode of the positive pole connecting triode Q12 of diode D12, the grounded emitter of audion Q12, the base stage of audion Q12 connects one end of resistance R0, the other end of resistance R0 is connected to the 19th pin of embedded microcontroller U12；nullIn sampling hold circuit，The common port of relay K 10 and K3～K9 switch is all connected with 12V DC voltage 12V+，The normally-closed contact of relay K 10 and K3～K9 switch connects diode D31 respectively、D21、D51、D41、D71、D61、The negative pole of D91 and D81，The normally opened contact of relay K 10 and K3～K9 switch connects adjustable resistance R21 respectively、R31、R41、R51、R61、R71、The fixing end of of R81 and R91，Adjustable resistance R21、R31、R41、R51、R61、R71、Another equal ground connection of fixing end of R81 and R91，The two ends of relay K 10 and K3～K9 coil connect diode D21 respectively、D31、D41、D51、D61、D71、The negative pole of D81 and D91、Positive pole，Diode D21、D31、D41、D51、D61、D71、The positive pole of D81 and D91 is connected respectively to the colelctor electrode of audion Q10 and Q3～Q9，The base stage of audion Q10 and Q3～Q9 connects the negative pole of diode D10 and D3～D9 respectively，The emitter stage of audion Q10 and Q3～Q9 connects diode D22 respectively、D32、D42、D52、D62、D72、The positive pole of D82 and D92，And simultaneously all ground connection，The positive pole of diode D10 and D3～D9 connects the 2nd pin of tapping block TS1 respectively、1st pin of tapping block TS1、2nd pin of tapping block TS2、1st pin of tapping block TS2、2nd pin of tapping block TS3、1st pin of tapping block TS3、2nd pin of tapping block TS4 and the 1st pin of tapping block TS4，Diode D22、D32、D42、D52、D62、D72、The negative pole of D82 and D92 connects diode D3 respectively、D10、D5、D4、D7、D6、The positive pole of D9 and D8，Tapping block TS1、TS2、On TS3 and TS4, each connection has an extension set p-wire；In polarity display circuit, one end of resistance R22, R32, R42, R52, R62, R72, R82 and R92 is connected respectively to the 1st～the 8th pin of LED light positive terminal LED+, 1st～the 8th pin of LED light positive terminal LED+ connects the positive pole of 8 LED lights respectively, the negative pole of 8 LED lights interconnect after ground connection；Between extension set MCU system and sampling hold circuit, the slider end of adjustable resistance R21, R31, R41, R51, R61, R71, R81 and R91 is connected respectively to the 33rd～the 40th pin of embedded microcontroller U12；Between sampling hold circuit and polarity display circuit, the fixing end of adjustable resistance R21, R31, R41, R51, R61, R71, R81 and R91 mono-connects the other end of resistance R22, R32, R42, R52, R62, R72, R82 and R92 respectively；Between extension set MCU system and extension set wireless transmission circuit, 3rd～the 8th pin of radio receiving transmitting module interface J22 is connected respectively to the 17th of embedded microcontroller U12 the, the 16th, the 24th, the 18th, the 15th and the 23rd pin, equipped with radio receiving transmitting module on radio receiving transmitting module interface J22.
In the main frame MCU system of the present invention, the model of its embedded microcontroller U1 is PIC16F877A-I/P；In transformer discharge circuit, the model of its diode D1 is IN4001, and the model of audion Q1 is 2N3904, and the model of diode D2 is IN4001, and the model of audion Q2 is 2N3904；In extension set MCU system, the model of its embedded microcontroller U12 is PIC16F877A-I/P.
On radio receiving transmitting module interface J2 in main frame wireless transmission circuit of the present invention, and the radio receiving transmitting module interface J22 in extension set wireless transmission circuit equipped with radio receiving transmitting module, be Monolithic RF transceiver chip, its model is nRF24L01+.
The invention have the advantage that 1) this multi-analog loop polarity tester integrated level height, each component is enclosed within a chest the least by test main frame, radio extension, easy to carry, simple to operate, one man operation, time saving and energy saving is only needed during test, check while once can completing multiple wire loop, test (and can need to expand according to scene), the correctness of the integrity in multi-analog loop, polarity disposably can be completed verification, avoid different personnel's wiring and contact the error that transmission aspect is brought, having ensured the safe operation of power supply unit；2) test main frame, radio extension use the wireless anti-interference transmission technology of distance, maximum transmission distance 1000m；Radio extension can meet the needs of the transformer circuit test of any position of Traction Substation of Electric Railway, and eliminates high voltage interference, tractive power supply system higher hamonic wave and the impact refluxed significantly completely, stable；3) according to the structure that CT, PT are different, take electric capacity electric discharge, the scheme of directly charging respectively, both extended the service life of power-supply battery, also ensure that the value of remote signaling；In addition to can completing the inspection of PT, CT body polarity; differential protection, impedance protection and measurement meter for polarized input requirements; also can disposably complete inspection from high-tension once secondary lead wires loop to low-voltage, it is ensured that whole youngster's loop polarity correct and connect reliable, ensure transformer put into operation after the selectivity of protection act and the accuracy of metering；4) provide instrument Redundancy Design, make test process not affected by instrument failure, in the case of check meter wireless transceiver system fault, the polarity of each test loop can be determined by the LED light luminescence situation connected on LED light positive terminal LED+ in indoor observation radio extension polarity display circuit；In the case of test hostdown, also signal can be received at transformer primary side dosage, radio extension end with aneroid battery, still can be determined the polarity of each test loop by the LED light luminescence situation connected on LED light positive terminal LED+ in indoor observation radio extension polarity display circuit, test jobs can never be affected because of the fault of instrument.
Accompanying drawing explanation
Fig. 1 is the use principle block diagram of the present invention；
Fig. 2 is the use principle block diagram of test current transformer；
Fig. 3 is test host circuit block diagram；
Fig. 4 is radio extension circuit block diagram；
Fig. 5 is test host circuit schematic diagram；
Fig. 6 is radio extension circuit theory diagrams.
Detailed description of the invention
As shown in figures 1 to 6, this multi-analog loop polarity tester, it is made up of test main frame and radio extension, it is characterized in that: have host test line on test main frame, radio extension has some extension set p-wires；The host test line of test main frame is connected to the input (polarity) of transformer primary winding and holds and export (nonpolar) end, each extension set p-wire of radio extension is connected to transformer secondary circuit cable respectively and introduces each coil of measure and control device porch, connects for wireless signal between radio extension and test main frame.Test main frame is for pressing feeler switch thereon (i.e., start/confirm button) after, while transformer primary winding side is applied voltage, send command signal and require that radio extension feedback test value, the test value then carried out radio extension transmission carry out computational analysis and determine the concrete polarity in transformer body and primary winding thereof extremely each secondary coil loop；Radio extension, for carrying out sampling analysis at transformer each secondary coil circuit end, determines its output polarity, thus obtains test value, and test value sends to by the way of being wirelessly transferred test main frame.
Such as Fig. 1, shown in 2, described host test line is by flowing mutual p-wire (i.e., current transformer p-wire) and press mutual p-wire (i.e., voltage transformer p-wire) composition, the concrete polarity chron in test current transformer body and primary winding thereof extremely each secondary coil loop, the mutual p-wire of stream of test main frame is (i.e., current transformer p-wire) it is connected to the input (polarity) of current transformer primary winding and holds and export (nonpolar) end, each extension set p-wire of radio extension is connected to secondary loop of mutual inductor cable respectively and introduces each coil of measure and control device porch；The concrete polarity chron in test voltage transformer body and primary winding thereof extremely each secondary coil loop, the mutual p-wire of pressure of test main frame is (i.e., voltage transformer p-wire) it is connected to the input (polarity) of voltage transformer primary winding and holds and export (nonpolar) end, each extension set p-wire of radio extension is connected to Secondary Circuit of Potential Transformer cable respectively and introduces each coil of measure and control device porch.
As shown in figures 1 to 6, described test main frame is mainly made up of main frame MCU system 1, host power supply 2, transformer discharge circuit 3, main frame wireless transmission circuit 4 and liquid crystal display 5, main frame MCU system 1 is for realizing the testing and control of current transformer, voltage transformer, and be analyzed calculating to the data that radio extension transmission is next, determine the positive and negative polarity of current transformer, voltage transformer, and error message is got rid of；Host power supply 2 is for providing 12V DC voltage 12V+, 5V DC voltage 5V+, 3.3V DC voltage VCC3.3 and 12V DC voltage 12vl for test host computer system；The primary winding of current transformer is discharged by transformer discharge circuit 3 for realization, charges voltage transformer primary winding, and when electric current reaches some levels, automatically disconnects charge circuit；Main frame wireless transmission circuit 4 is for realizing the wireless telecommunications between test main frame and radio extension；Liquid crystal display 5 is for showing the test result of current transformer, voltage transformer；Described radio extension is mainly made up of extension set MCU system 6, Exgt Bat extension battery 7, sampling hold circuit 8, polarity display circuit 9 and extension set wireless transmission circuit 10, extension set MCU system 6 is for controlling the transmitting-receiving of radio receiving transmitting module, gather the actuating signal of sampling hold circuit 8, form data and be sent to test main frame；Exgt Bat extension battery 7 is for providing 12V DC voltage 12vl and 3.3V DC voltage VCC for radio extension system, and provides ground connection tapping block and power supply indicator binding post for radio extension system；Sampling hold circuit 8, for gathering the pulse signal of transformer secondary coil loop generation and keeping, gathers for extension set MCU system 6, and forms data；Polarity display circuit 9, for indicating the adding of institute survey time road, subtractive polarity, compares, to guarantee the accuracy of test result with testing main frame simultaneously as auxiliary display；Extension set wireless transmission circuit 10 is for realizing the wireless telecommunications between radio extension and test main frame.
As seen in figures 3-6, in described main frame MCU system 1, there are embedded microcontroller U1, main frame crystal oscillating circuit and host reset circuit, in main frame crystal oscillating circuit, have crystal oscillator Y1 and electric capacity C1 and C2, in host reset circuit, have reset resistor Rfw and binding post FW；Tapping block CON1, CON2, CON3 and CON8 is had in host power supply 2；Tapping block CON6 and CON7, resistance R3～R6, CT discharge loop and PT discharge loop is had in transformer discharge circuit 3, there are relay K 1, tapping block CON4, polarized electric capacity C3, diode D1, audion Q1 and resistance R1 in CT discharge loop, in PT discharge loop, have relay K 2, tapping block CON5, diode D2, audion Q2 and resistance R2；Radio receiving transmitting module interface J2 is had in main frame wireless transmission circuit 4；Liquid crystal display interface J1 is had in liquid crystal display 5；Embedded microcontroller U12, extension set crystal oscillating circuit, extension set reset circuit, relay K 12, diode D12, audion Q12 and resistance R0 is had in extension set MCU system 6, there is crystal oscillator Y12 and electric capacity C12 and C22 in extension set crystal oscillating circuit, in extension set reset circuit, have reset resistor Rfw2 and binding post FW2；Tapping block TS3.3V, TS12V, TS-GND1 and TS-GND2, binding post J-LED and resistance Rled is had in Exgt Bat extension battery 7；Relay K 10 and K3～K9, diode D10, D3～D9, D21, D31, D41, D51, D61, D71, D81, D91, D22, D32, D42, D52, D62, D72, D82 and D92, audion Q10 and Q3～Q9, adjustable resistance R21, R31, R41, R51, R61, R71, R81 and R91 and tapping block TS1, TS2, TS3 and TS4 is had in sampling hold circuit 8；Resistance R22, R32, R42, R52, R62, R72, R82 and R92 and LED light positive terminal LED+ is had in polarity display circuit 9；Radio receiving transmitting module interface J22 is had in extension set wireless transmission circuit 10；
Its circuit connecting relation is: in test main frame, the binding post FW of main frame MCU system 1 is connected to reset key；In host power supply 2,1st and the 2nd pin of tapping block CON1 connects 12V DC voltage 12V+ and ground respectively, 1st and the 2nd pin of tapping block CON2 connects 5V DC voltage 5V+ and ground respectively, 1st and the 2nd pin of tapping block CON3 connects 3.3V DC voltage VCC3.3 and ground respectively, and the 1st and the 2nd pin of tapping block CON8 connects 12V DC voltage 12vl and ground respectively；nullIn transformer discharge circuit 3，1st pin of tapping block CON6 connects one end of resistance R3 and R4，2nd pin of tapping block CON6 connects 5V DC voltage 5V+，The other end ground connection of resistance R4，1st pin of tapping block CON7 connects one end of resistance R5 and R6，2nd pin of tapping block CON7 connects 5V DC voltage 5V+，The other end ground connection of resistance R6，It is connected to flow mutually/pressure on tapping block CON6 and tests selection key mutually (i.e.，Current transformer/voltage transformer test selection key)，It is connected on tapping block CON7 start/confirm button，CT discharge loop is (i.e.，Current transformer discharge circuit) in，The normally opened contact of relay K 1 switch and normally-closed contact connect the 1st pin and the 12V DC voltage 12V+ of tapping block CON4 respectively，The common port of relay K 1 switch connects the positive pole of polarized electric capacity C3，2nd pin of tapping block CON4 and the equal ground connection of negative pole of polarized electric capacity C3，The two ends of relay K 1 coil connect positive pole and the negative pole of diode D1 respectively，The negative pole of diode D1 connects 12V DC voltage 12V+，The colelctor electrode of the positive pole connecting triode Q1 of diode D1，The grounded emitter of audion Q1，The base stage of audion Q1 connects one end of resistance R1，It is connected on tapping block CON4 flow mutual p-wire (i.e.，Current transformer p-wire)，PT discharge loop is (i.e.，Voltage transformer discharge circuit) in，The normally opened contact of relay K 2 switch connects the 1st pin of tapping block CON5，The common port of relay K 2 switch connects 12V DC voltage 12vl，The 2nd pin ground connection of tapping block CON5，The two ends of relay K 2 coil connect positive pole and the negative pole of diode D2 respectively，The negative pole of diode D2 connects 12V DC voltage 12V+，The colelctor electrode of the positive pole connecting triode Q2 of diode D2，The grounded emitter of audion Q2，The base stage of audion Q2 connects one end of resistance R2，It is connected on tapping block CON5 press mutual p-wire (i.e.，Voltage transformer p-wire)；Between main frame MCU system 1 and transformer discharge circuit 3, the other end of resistance R3 is connected to the 21st pin of embedded microcontroller U1, the other end of resistance R5 is connected to the 22nd pin of embedded microcontroller U1, the resistance R1 other end of CT discharge loop is connected to the 19th pin of embedded microcontroller U1, and the resistance R2 other end of PT discharge loop is connected to the 20th pin of embedded microcontroller U1；Between main frame MCU system 1 and main frame wireless transmission circuit 4,3rd～the 8th pin of radio receiving transmitting module interface J2 is connected respectively to the 17th of embedded microcontroller U1 the, the 16th, the 24th, the 18th, the 15th and the 23rd pin, equipped with radio receiving transmitting module on radio receiving transmitting module interface J2；Between main frame MCU system 1 and liquid crystal display 5, the 5th～the 14th pin of liquid crystal display interface J1 is connected respectively to the 33rd～the 40th, the 2nd and the 3rd pin of embedded microcontroller U1, equipped with liquid crystal display on liquid crystal display interface J1；
In radio extension, in Exgt Bat extension battery 7,1st and the 2nd pin of tapping block TS3.3V connects 3.3V DC voltage VCC and ground respectively, 1st and the 2nd pin of tapping block TS12V connects 12V DC voltage 12vl and ground respectively, 1st and the 2nd pin of tapping block TS-GND1 and the 1st and the 2nd equal ground connection of pin of tapping block TS-GND2,1st pin of binding post J-LED connects one end of resistance Rled, the other end of resistance Rled connects 12V DC voltage 12vl, the 2nd pin ground connection of binding post J-LED, binding post J-LED is connected to LED light；In extension set MCU system 6, it is connected to reset key on binding post FW2, the common port of relay K 12 switch connects the negative pole of diode D12, the normally opened contact of relay K 12 switch draws 12V DC voltage 12V+, the two ends of relay K 12 coil connect positive pole and the negative pole of diode D12 respectively, the negative pole of diode D12 connects 12V DC voltage 12vl, the colelctor electrode of the positive pole connecting triode Q12 of diode D12, the grounded emitter of audion Q12, the base stage of audion Q12 connects one end of resistance R0, the other end of resistance R0 is connected to the 19th pin of embedded microcontroller U12；nullIn sampling hold circuit 8，The common port of relay K 10 and K3～K9 switch is all connected with 12V DC voltage 12V+，The normally-closed contact of relay K 10 and K3～K9 switch connects diode D31 respectively、D21、D51、D41、D71、D61、The negative pole of D91 and D81，The normally opened contact of relay K 10 and K3～K9 switch connects adjustable resistance R21 respectively、R31、R41、R51、R61、R71、The fixing end of of R81 and R91，Adjustable resistance R21、R31、R41、R51、R61、R71、Another equal ground connection of fixing end of R81 and R91，The two ends of relay K 10 and K3～K9 coil connect diode D21 respectively、D31、D41、D51、D61、D71、The negative pole of D81 and D91、Positive pole，Diode D21、D31、D41、D51、D61、D71、The positive pole of D81 and D91 is connected respectively to the colelctor electrode of audion Q10 and Q3～Q9，The base stage of audion Q10 and Q3～Q9 connects the negative pole of diode D10 and D3～D9 respectively，The emitter stage of audion Q10 and Q3～Q9 connects diode D22 respectively、D32、D42、D52、D62、D72、The positive pole of D82 and D92，And simultaneously all ground connection，The positive pole of diode D10 and D3～D9 connects the 2nd pin of tapping block TS1 respectively、1st pin of tapping block TS1、2nd pin of tapping block TS2、1st pin of tapping block TS2、2nd pin of tapping block TS3、1st pin of tapping block TS3、2nd pin of tapping block TS4 and the 1st pin of tapping block TS4，Diode D22、D32、D42、D52、D62、D72、The negative pole of D82 and D92 connects diode D3 respectively、D10、D5、D4、D7、D6、The positive pole of D9 and D8，Tapping block TS1、TS2、On TS3 and TS4, each connection has an extension set p-wire；In polarity display circuit 9, one end of resistance R22, R32, R42, R52, R62, R72, R82 and R92 is connected respectively to the 1st～the 8th pin of LED light positive terminal LED+, 1st～the 8th pin of LED light positive terminal LED+ connects the positive pole of 8 LED lights respectively, the negative pole of 8 LED lights interconnect after ground connection；Between extension set MCU system 6 and sampling hold circuit 8, the slider end of adjustable resistance R21, R31, R41, R51, R61, R71, R81 and R91 is connected respectively to the 33rd～the 40th pin of embedded microcontroller U12；Between sampling hold circuit 8 and polarity display circuit 9, the fixing end of adjustable resistance R21, R31, R41, R51, R61, R71, R81 and R91 mono-connects the other end of resistance R22, R32, R42, R52, R62, R72, R82 and R92 respectively；Between extension set MCU system 6 and extension set wireless transmission circuit 10,3rd～the 8th pin of radio receiving transmitting module interface J22 is connected respectively to the 17th of embedded microcontroller U12 the, the 16th, the 24th, the 18th, the 15th and the 23rd pin, equipped with radio receiving transmitting module on radio receiving transmitting module interface J22.
As shown in Figure 5,6, in main frame MCU system 1, the model of its embedded microcontroller U1 is PIC16F877A-I/P；In transformer discharge circuit 3, the model of its diode D1 is IN4001, and the model of audion Q1 is 2N3904, and the model of diode D2 is IN4001, and the model of audion Q2 is 2N3904；In extension set MCU system 6, the model of its embedded microcontroller U12 is PIC16F877A-I/P.On radio receiving transmitting module interface J2 in main frame wireless transmission circuit 4, and the radio receiving transmitting module interface J22 in extension set wireless transmission circuit 10 equipped with radio receiving transmitting module, be Monolithic RF transceiver chip, its model is nRF24L01+.
This multi-analog loop polarity tester, the 12V DC voltage in host power supply 2, Exgt Bat extension battery 7 is provided by rechargeable battery, and rechargeable battery can be selected for lithium battery.In Exgt Bat extension battery 7, the LED light that binding post J-LED is connected to is power supply indicator, is used to refer to the break-make of radio extension power supply；In polarity display circuit 9,8 LED lights that LED light positive terminal LED+ connects are polarity display lamp, are used to refer to the polarity of four wire loops of transformer.
Claims (6)
1. a multi-analog loop polarity tester, is made up of test main frame and radio extension, it is characterized in that: have host test line on test main frame, radio extension has some extension set p-wires；The host test line of test main frame is connected to input and the outfan of transformer primary winding, each extension set p-wire of radio extension is connected to transformer secondary circuit cable respectively and introduces each coil of measure and control device porch, connects for wireless signal between radio extension and test main frame.
A kind of multi-analog loop polarity tester the most according to claim 1, it is characterized in that: described host test line is by flowing mutual p-wire and pressing mutual p-wire to form, the concrete polarity chron in test current transformer body and primary winding thereof extremely each secondary coil loop, the mutual p-wire that flows of test main frame is connected to input and the outfan of current transformer primary winding, and each extension set p-wire of radio extension is connected to secondary loop of mutual inductor cable respectively and introduces each coil of measure and control device porch；The concrete polarity chron in test voltage transformer body and primary winding thereof extremely each secondary coil loop, the mutual p-wire of pressing of test main frame is connected to input and the outfan of voltage transformer primary winding, and each extension set p-wire of radio extension is connected to Secondary Circuit of Potential Transformer cable respectively and introduces each coil of measure and control device porch.
A kind of multi-analog loop polarity tester the most according to claim 1 and 2, it is characterized in that: described test main frame is mainly made up of main frame MCU system (1), host power supply (2), transformer discharge circuit (3), main frame wireless transmission circuit (4) and liquid crystal display (5), main frame MCU system (1) is for realizing the testing and control of current transformer, voltage transformer, and be analyzed calculating to the data that radio extension transmission is next, determine the positive and negative polarity of current transformer, voltage transformer, and error message is got rid of；Host power supply (2) is for providing 12V DC voltage 12V+, 5V DC voltage 5V+, 3.3V DC voltage VCC3.3 and 12V DC voltage 12vl for test host computer system；The primary winding of current transformer is discharged by transformer discharge circuit (3) for realization, charges voltage transformer primary winding, and when electric current reaches some levels, automatically disconnects charge circuit；Main frame wireless transmission circuit (4) is for realizing the wireless telecommunications between test main frame and radio extension；Liquid crystal display (5) is for showing the test result of current transformer, voltage transformer；Described radio extension is mainly made up of extension set MCU system (6), Exgt Bat extension battery (7), sampling hold circuit (8), polarity display circuit (9) and extension set wireless transmission circuit (10), extension set MCU system (6) is for controlling the transmitting-receiving of radio receiving transmitting module, gather the actuating signal of sampling hold circuit (8), form data and be sent to test main frame；Exgt Bat extension battery (7) is for providing 12V DC voltage 12vl and 3.3V DC voltage VCC for radio extension system, and provides ground connection tapping block and power supply indicator binding post for radio extension system；Sampling hold circuit (8), for gathering the pulse signal of transformer secondary coil loop generation and keeping, gathers for extension set MCU system (6), and forms data；Polarity display circuit (9), for indicating the adding of institute survey time road, subtractive polarity, compares, to guarantee the accuracy of test result with testing main frame simultaneously as auxiliary display；Extension set wireless transmission circuit (10) is for realizing the wireless telecommunications between radio extension and test main frame.
A kind of multi-analog loop polarity tester the most according to claim 3, it is characterized in that: in described main frame MCU system (1), have embedded microcontroller U1, main frame crystal oscillating circuit and host reset circuit, there is crystal oscillator Y1 and electric capacity C1 and C2 in main frame crystal oscillating circuit, in host reset circuit, have reset resistor Rfw and binding post FW；Host power supply has tapping block CON1, CON2, CON3 and CON8 in (2)；Tapping block CON6 and CON7, resistance R3～R6, CT discharge loop and PT discharge loop is had in transformer discharge circuit (3), there are relay K 1, tapping block CON4, polarized electric capacity C3, diode D1, audion Q1 and resistance R1 in CT discharge loop, in PT discharge loop, have relay K 2, tapping block CON5, diode D2, audion Q2 and resistance R2；Radio receiving transmitting module interface J2 is had in main frame wireless transmission circuit (4)；Liquid crystal display has liquid crystal display interface J1 in (5)；Embedded microcontroller U12, extension set crystal oscillating circuit, extension set reset circuit, relay K 12, diode D12, audion Q12 and resistance R0 is had in extension set MCU system (6), there is crystal oscillator Y12 and electric capacity C12 and C22 in extension set crystal oscillating circuit, in extension set reset circuit, have reset resistor Rfw2 and binding post FW2；Tapping block TS3.3V, TS12V, TS-GND1 and TS-GND2, binding post J-LED and resistance Rled is had in Exgt Bat extension battery (7)；Relay K 10 and K3～K9, diode D10, D3～D9, D21, D31, D41, D51, D61, D71, D81, D91, D22, D32, D42, D52, D62, D72, D82 and D92, audion Q10 and Q3～Q9, adjustable resistance R21, R31, R41, R51, R61, R71, R81 and R91 and tapping block TS1, TS2, TS3 and TS4 is had in sampling hold circuit (8)；Resistance R22, R32, R42, R52, R62, R72, R82 and R92 and LED light positive terminal LED+ is had in polarity display circuit (9)；Radio receiving transmitting module interface J22 is had in extension set wireless transmission circuit (10)；
Its circuit connecting relation is: in test main frame, the binding post FW of main frame MCU system (1) is connected to reset key；In host power supply (2), 1st and the 2nd pin of tapping block CON1 connects 12V DC voltage 12V+ and ground respectively, 1st and the 2nd pin of tapping block CON2 connects 5V DC voltage 5V+ and ground respectively, 1st and the 2nd pin of tapping block CON3 connects 3.3V DC voltage VCC3.3 and ground respectively, and the 1st and the 2nd pin of tapping block CON8 connects 12V DC voltage 12vl and ground respectively；nullIn transformer discharge circuit (3)，1st pin of tapping block CON6 connects one end of resistance R3 and R4，2nd pin of tapping block CON6 connects 5V DC voltage 5V+，The other end ground connection of resistance R4，1st pin of tapping block CON7 connects one end of resistance R5 and R6，2nd pin of tapping block CON7 connects 5V DC voltage 5V+，The other end ground connection of resistance R6，It is connected to flow mutually/pressure on tapping block CON6 and tests selection key mutually，It is connected on tapping block CON7 start/confirm button，In CT discharge loop，The normally opened contact of relay K 1 switch and normally-closed contact connect the 1st pin and the 12V DC voltage 12V+ of tapping block CON4 respectively，The common port of relay K 1 switch connects the positive pole of polarized electric capacity C3，2nd pin of tapping block CON4 and the equal ground connection of negative pole of polarized electric capacity C3，The two ends of relay K 1 coil connect positive pole and the negative pole of diode D1 respectively，The negative pole of diode D1 connects 12V DC voltage 12V+，The colelctor electrode of the positive pole connecting triode Q1 of diode D1，The grounded emitter of audion Q1，The base stage of audion Q1 connects one end of resistance R1，It is connected on tapping block CON4 flow mutual p-wire，In PT discharge loop，The normally opened contact of relay K 2 switch connects the 1st pin of tapping block CON5，The common port of relay K 2 switch connects 12V DC voltage 12vl，The 2nd pin ground connection of tapping block CON5，The two ends of relay K 2 coil connect positive pole and the negative pole of diode D2 respectively，The negative pole of diode D2 connects 12V DC voltage 12V+，The colelctor electrode of the positive pole connecting triode Q2 of diode D2，The grounded emitter of audion Q2，The base stage of audion Q2 connects one end of resistance R2，It is connected on tapping block CON5 press mutual p-wire；Between main frame MCU system (1) and transformer discharge circuit (3), the other end of resistance R3 is connected to the 21st pin of embedded microcontroller U1, the other end of resistance R5 is connected to the 22nd pin of embedded microcontroller U1, the resistance R1 other end of CT discharge loop is connected to the 19th pin of embedded microcontroller U1, and the resistance R2 other end of PT discharge loop is connected to the 20th pin of embedded microcontroller U1；Between main frame MCU system (1) and main frame wireless transmission circuit (4), 3rd～the 8th pin of radio receiving transmitting module interface J2 is connected respectively to the 17th of embedded microcontroller U1 the, the 16th, the 24th, the 18th, the 15th and the 23rd pin, equipped with radio receiving transmitting module on radio receiving transmitting module interface J2；Between main frame MCU system (1) and liquid crystal display (5), the 5th～the 14th pin of liquid crystal display interface J1 is connected respectively to the 33rd～the 40th, the 2nd and the 3rd pin of embedded microcontroller U1, equipped with liquid crystal display on liquid crystal display interface J1；
In radio extension, in Exgt Bat extension battery (7), 1st and the 2nd pin of tapping block TS3.3V connects 3.3V DC voltage VCC and ground respectively, 1st and the 2nd pin of tapping block TS12V connects 12V DC voltage 12vl and ground respectively, 1st and the 2nd pin of tapping block TS-GND1 and the 1st and the 2nd equal ground connection of pin of tapping block TS-GND2,1st pin of binding post J-LED connects one end of resistance Rled, the other end of resistance Rled connects 12V DC voltage 12vl, the 2nd pin ground connection of binding post J-LED, binding post J-LED is connected to LED light；In extension set MCU system (6), it is connected to reset key on binding post FW2, the common port of relay K 12 switch connects the negative pole of diode D12, the normally opened contact of relay K 12 switch draws 12V DC voltage 12V+, the two ends of relay K 12 coil connect positive pole and the negative pole of diode D12 respectively, the negative pole of diode D12 connects 12V DC voltage 12vl, the colelctor electrode of the positive pole connecting triode Q12 of diode D12, the grounded emitter of audion Q12, the base stage of audion Q12 connects one end of resistance R0, the other end of resistance R0 is connected to the 19th pin of embedded microcontroller U12；nullIn sampling hold circuit (8)，The common port of relay K 10 and K3～K9 switch is all connected with 12V DC voltage 12V+，The normally-closed contact of relay K 10 and K3～K9 switch connects diode D31 respectively、D21、D51、D41、D71、D61、The negative pole of D91 and D81，The normally opened contact of relay K 10 and K3～K9 switch connects adjustable resistance R21 respectively、R31、R41、R51、R61、R71、The fixing end of of R81 and R91，Adjustable resistance R21、R31、R41、R51、R61、R71、Another equal ground connection of fixing end of R81 and R91，The two ends of relay K 10 and K3～K9 coil connect diode D21 respectively、D31、D41、D51、D61、D71、The negative pole of D81 and D91、Positive pole，Diode D21、D31、D41、D51、D61、D71、The positive pole of D81 and D91 is connected respectively to the colelctor electrode of audion Q10 and Q3～Q9，The base stage of audion Q10 and Q3～Q9 connects the negative pole of diode D10 and D3～D9 respectively，The emitter stage of audion Q10 and Q3～Q9 connects diode D22 respectively、D32、D42、D52、D62、D72、The positive pole of D82 and D92，And simultaneously all ground connection，The positive pole of diode D10 and D3～D9 connects the 2nd pin of tapping block TS1 respectively、1st pin of tapping block TS1、2nd pin of tapping block TS2、1st pin of tapping block TS2、2nd pin of tapping block TS3、1st pin of tapping block TS3、2nd pin of tapping block TS4 and the 1st pin of tapping block TS4，Diode D22、D32、D42、D52、D62、D72、The negative pole of D82 and D92 connects diode D3 respectively、D10、D5、D4、D7、D6、The positive pole of D9 and D8，Tapping block TS1、TS2、On TS3 and TS4, each connection has an extension set p-wire；In polarity display circuit (9), one end of resistance R22, R32, R42, R52, R62, R72, R82 and R92 is connected respectively to the 1st～the 8th pin of LED light positive terminal LED+, 1st～the 8th pin of LED light positive terminal LED+ connects the positive pole of 8 LED lights respectively, the negative pole of 8 LED lights interconnect after ground connection；Between extension set MCU system (6) and sampling hold circuit (8), the slider end of adjustable resistance R21, R31, R41, R51, R61, R71, R81 and R91 is connected respectively to the 33rd～the 40th pin of embedded microcontroller U12；Between sampling hold circuit (8) and polarity display circuit (9), the fixing end of adjustable resistance R21, R31, R41, R51, R61, R71, R81 and R91 mono-connects the other end of resistance R22, R32, R42, R52, R62, R72, R82 and R92 respectively；Between extension set MCU system (6) and extension set wireless transmission circuit (10), 3rd～the 8th pin of radio receiving transmitting module interface J22 is connected respectively to the 17th of embedded microcontroller U12 the, the 16th, the 24th, the 18th, the 15th and the 23rd pin, equipped with radio receiving transmitting module on radio receiving transmitting module interface J22.
A kind of multi-analog loop polarity tester the most according to claim 4, is characterized in that: in main frame MCU system (1), the model of its embedded microcontroller U1 is PIC16F877A-I/P；In transformer discharge circuit (3), the model of its diode D1 is IN4001, and the model of audion Q1 is 2N3904, and the model of diode D2 is IN4001, and the model of audion Q2 is 2N3904；In extension set MCU system (6), the model of its embedded microcontroller U12 is PIC16F877A-I/P
。
A kind of multi-analog loop polarity tester the most according to claim 4, it is characterized in that: the radio receiving transmitting module interface J2 in main frame wireless transmission circuit (4), and on the radio receiving transmitting module interface J22 in extension set wireless transmission circuit (10) equipped with radio receiving transmitting module, being Monolithic RF transceiver chip, its model is nRF24L01+
。
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| CN109375047B (en) * | 2018-09-25 | 2020-10-16 | 深圳供电局有限公司 | System and method for testing double-end asynchronous polarity of high-voltage transmission line |
| CN109143143A (en) * | 2018-10-19 | 2019-01-04 | 天生桥二级水力发电有限公司天生桥水力发电总厂 | Transformer substation current transformer secondary side polarity intelligent detection device and method |
| CN109765453A (en) * | 2019-03-29 | 2019-05-17 | 广东电网有限责任公司 | A kind of Protection secondary circuit wiring automatic tester |
| CN112684381A (en) * | 2020-12-03 | 2021-04-20 | 广东电网有限责任公司中山供电局 | CT polarity tester of hand-held type wireless transmission sampling |
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|---|---|
| CN105891664B (en) | 2018-09-11 |
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