CN109407036A - A kind of full-automatic calibrating installation of batch current transformer based on PLC control - Google Patents
A kind of full-automatic calibrating installation of batch current transformer based on PLC control Download PDFInfo
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- CN109407036A CN109407036A CN201811638629.3A CN201811638629A CN109407036A CN 109407036 A CN109407036 A CN 109407036A CN 201811638629 A CN201811638629 A CN 201811638629A CN 109407036 A CN109407036 A CN 109407036A
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- 238000009434 installation Methods 0.000 title claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000001360 synchronised effect Effects 0.000 claims abstract description 15
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 230000033228 biological regulation Effects 0.000 claims description 26
- 238000004891 communication Methods 0.000 claims description 11
- 230000001276 controlling effect Effects 0.000 claims description 8
- 230000005674 electromagnetic induction Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000011022 operating instruction Methods 0.000 claims description 4
- 238000005070 sampling Methods 0.000 claims description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims 1
- 240000002853 Nelumbo nucifera Species 0.000 claims 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000012795 verification Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000004080 punching Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000004224 protection Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention discloses a kind of full-automatic mutual inductor calibrating installations based on PLC control, and reliable and stable compared to single-chip microcontroller control route after control is added in PLC, strong antijamming capability substantially reduces breakdown maintenance rate, high degree of automation；In addition it is once connected using subject current transformer and flows up the method that the synchronous detection station of secondary terminals parallel connection opens test, secondary loop of mutual inductor external wire impedance, which can also be accurately controlled, even if batch parallel-current mutual inductor complies with regulatory requirements 0.05 Ω or 0.06 Ω, ensure the accuracy of gauging error, and ensure sorrow of the current transformer without second open circuit by PLC programming Control make-before-break 5~10 milliseconds of switching station technical methods of delay, more large batch of straight-through current transformer can be achieved so automatically to examine and determine, increasing electromechanical control equipment with the method can also realize that assembly line detects, greatly improve detection working efficiency；Device is separate unit automatic Verification to non-straight-through current transformer and voltage transformer calibrating.
Description
Technical field
The present invention relates to mutual inductor detection technique field, specially a kind of batch punching electricity based on PLC Industry Control
The full-automatic calibrating installation of current transformer.
Background technique
Transformer calibrating device is the accuracy in order to guarantee mutual inductor in electric system electric energy metering device, uses it in dress
The preceding Special precision instrument examined and determine, test transformer error.The transformer calibrating device that electric system at present generally uses
Diversified forms.Wherein relatively advanced full-automatic mutual inductor examines and determine calibration equipment, and having can be according to ct calibrating regulatory requirements
Measurement point carry out automatically fully loaded and be lightly loaded measurement according to electric current or the voltage requirement of different no-load voltage ratios.Ct calibrating management
Software is automatically whole by test data progress error informationization according to the accuracy rating of subject mutual inductor, and judges whether overproof.Mutually
Sensor Burden box loads gear and automatically switches, without artificial switching.Device can also be automatically performed the closed circuit demagnetization test of mutual inductor simultaneously
And have the function of a variety of protections etc..But due to being all single-chip microcontroller control, stability and reliability is poor, maintenance rate height is also not easy to
User programs modification and maintenance as needed, since calibrating current transformer is all that batch concatenation integrating relay contact resistance is super
The requirement of secondary impedance as defined in regulation is crossed, attaching batch is restricted typically not greater than 12 current transformers, otherwise
The overproof error for seriously affecting detection mutual inductor of secondary load is so as to cause electrical energy measurement inaccuracy.With power grid upgrading pair
The demand of mutual inductor increases, synchronous to the calibrating amount of mutual inductor to increase, improve mutual inductor detection working efficiency reduce O&M at
This become very big demand, embody in this way it is based on PLC Industry Control and connect secondary terminals and accurately control secondary impedance can
Realize the advantage for the device automatically examined and determine compared with high-volume straight-through current transformer.
Summary of the invention
The purpose of the present invention is to provide it is a kind of based on PLC control and connect secondary terminals and accurately control secondary impedance can
It realizes the device automatically examined and determine compared with high-volume straight-through current transformer, while non-straight-through current transformer can also be examined and determine
And voltage transformer, to solve the problems mentioned in the above background technology.
To achieve the above object, the invention provides the following technical scheme: a kind of batch current transformer based on PLC control
Full-automatic calibrating installation, including being controlled based on PLC and connecing secondary terminals and batch punching can be realized by accurately controlling secondary impedance
The device (hereinafter referred to as: device) that formula current transformer is automatically examined and determine, described device are equipped with host computer, one end of host computer
It is connect with mutual-inductor tester, the other end of host computer is connect with program control instrument, it is also possible to which host computer only connects program control instrument, program-controlled
Instrument reconnects mutual-inductor tester, and described device is additionally provided with current transformer load box, voltage transformer Burden box, pressure regulation output
The side of assembly (or program-controlled electric component), A.C. contactor etc., the A.C. contactor is equipped with digital current/voltmeter, standard
Current Transformer Secondary tap group, certainly up-flow standard current transformer, certainly boosting standard potential transformer, ancillary test platform N work
Hyte.The current transformer load box, voltage transformer Burden box are also likely to be combined current and voltage transformer load
Case；The pressure regulation output assembly is to pass through intermediate transformer line by coarse adjustment electric voltage regulator assembly, fine tuning electric voltage regulator assembly
Packet, which is connected with each other, to be formed and may also be substituted with program-controlled electric component；Standard current transformer secondary tap group, certainly the up-flow standard
Current transformer is also likely to be the up-flow intelligent standard current transformer certainly with the secondary tap switching relay of no-load voltage ratio, it is also possible to
Current lifting device and the secondary tap group of standard current transformer and standard current transformer are used separately；It is described mutual from boosting normalized current
Sensor is also likely to be that booster and standard potential transformer are used separately；The program control instrument be comprising PLC programmable controller and
The composition such as its programming Control touch screen and Acquisition Circuit；One end of the ancillary test platform N station group and mutual-inductor tester
One end connection.
Preferably, the ancillary test platform N station group is equipped with N (1≤N < 100) a station and automatically switches, program control instrument control
N number of station auto station switches, is mutual from the secondary tap automatic switchover of up-flow standard current transformer polytropic ratio, electric current on secondary station
The load gear of sensor Burden box and voltage transformer Burden box automatically switches, the automatic lifting of pressure regulation output assembly voltage, with
And the actuation of A.C. contactor, program control instrument and mutual-inductor tester correlation signal acquire, digital electronic ammeter seals in transducer check
Instrument secondary current circuit, digital voltmeter are incorporated to mutual-inductor tester secondary voltage circuit, program control instrument and digital current/voltmeter
Connection, program control instrument control the operating status of mutual-inductor tester automatic or manual.
Preferably, N straight-through current transformer on the program control instrument control device secondary station is once that a circle is worn
The heart, secondary terminals parallel connection indicate access station group according to polarity.
Compared with prior art, the beneficial effects of the present invention are:
Reliable and stable compared to single-chip microcontroller control route after control is added in PLC of the present invention, strong antijamming capability makes failure
Maintenance rate substantially reduces, high degree of automation；In addition using subject current transformer once connect flow up secondary terminals and in conjunction with
The method that detection station opens test is walked, Current Transformer Secondary can also be accurately controlled even if batch parallel-current mutual inductor and returned
Road external wire resistance complies with regulatory requirements 0.05 Ω or 0.06 Ω, it is ensured that the accuracy of gauging error, and pass through
5~10 milliseconds of switching station technical methods of PLC programming Control make-before-break delay ensure the sorrow of no second open circuit, can be achieved in this way
More large batch of straight-through current transformer is automatically examined and determine, and assembly line can also be realized by increasing electromechanical control equipment with the method
Detection, greatly improves detection working efficiency；Device to non-straight-through current transformer and voltage transformer calibrating be separate unit from
Dynamic calibrating.
Detailed description of the invention
Fig. 1 is controlled the present invention is based on PLC and is connect secondary terminals and batch punching can be realized by accurately controlling secondary impedance
The device that formula current transformer is automatically examined and determine configures block diagram；
Fig. 2 is secondary station stereoscopic schematic diagram of the present invention；
Fig. 3 is current transformer Detection & Controling principle wiring schematic diagram of the present invention；
Fig. 4 is voltage transformer Detection & Controling principle wiring schematic diagram of the present invention；
Fig. 5 is controlled the present invention is based on PLC and is connect secondary terminals and batch punching can be realized by accurately controlling secondary impedance
Second of configuration block diagram of device that formula current transformer is automatically examined and determine；
Fig. 6 is second of configuration current transformer Detection & Controling principle wiring schematic diagram of the invention；
Fig. 7 is second of configuration voltage transformer Detection & Controling principle wiring schematic diagram of the invention；
In figure: 1, based on PLC control and connect secondary terminals and batch Current Mutual Inductance can be realized by accurately controlling secondary impedance
The device that device is automatically examined and determine；2, host computer；3, mutual-inductor tester；4, program control instrument；5, current transformer load box；6, digital
Current/voltage table；7, A.C. contactor；8, pressure regulation output assembly (or program-controlled electric component)；9, from up-flow standard current transformer；
10, secondary station N station group；11, it is tested current transformer；12, it is tested voltage transformer；13, from boosting standard potential transformer；
14, voltage transformer Burden box；15, the secondary tap group of standard current transformer.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1: please referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, and the present invention provides a kind of technical solution: one kind is controlled based on PLC
The full-automatic calibrating installation of batch current transformer, accurately control secondary resistance including controlling based on PLC and connecing secondary terminals
Resist and the device 1 that batch straight-through current transformer is automatically examined and determine can be achieved, by computer desk, master in 1 overall structure of described device
Control platform and secondary station composition.The host computer 2 of ct calibrating management system software is installed, respectively and in master station on computer desk
PLC passes through RS232 interface both-way communication in mutual-inductor tester 3 and program control instrument 4；Master station is equipped with mutual-inductor tester 3, journey
Control instrument 4, current transformer load box 5, digital current/voltmeter 6, A.C. contactor 7, pressure regulation output assembly (or program-controlled electronic
Source) 8；Secondary station is shown in Fig. 2 configuration from up-flow standard current transformer 9, secondary station N station group 10, certainly boosting normal voltage mutual inductance
Device 13 (the high-voltage safety required distance of safety is general individually external beside secondary station), voltage transformer Burden box 14, standard
Current Transformer Secondary tap group 15.Digital current/voltmeter 6 provides electricity by PLC communication in RS485 interface and program control instrument 4
Stream/voltage digital signal, in program control instrument (4) PLC be also respectively connected with control mutual-inductor tester 3, current transformer load box 5,
A.C. contactor 7, pressure regulation output assembly (or program-controlled electric component) 8, certainly up-flow standard current transformer 9, secondary station N station group
10, the secondary tap group 15 of voltage transformer Burden box 14, standard current transformer, the T of mutual-inductor tester 30Pass through serial number
The ammeter connection secondary tap group 15 of standard current transformer of word current/voltmeter 6 flows up standard current transformer 9 with oneself again
Secondary non-polar end KXIt connects, the T of mutual-inductor tester 3XBy connect with current transformer load box 5 again with secondary station N station
The 11 non-polar end station relay of N number of subject current transformer of group 10 corresponds to N number of normally opened contact and is connected in parallel to dock N number of
It is tested the secondary non-polar end S2 of current transformer 11, the K of mutual-inductor tester 3iConnection flows up standard current transformer 9 two certainly
The secondary polarity end S1 of N number of subject current transformer 11 in parallel, the D connection instrument of mutual-inductor tester 3 connect secondary polar end K1 again
Ground terminal is grounded again, and the contact selection switch that pressure regulation exports the connection A.C. contactor 7 of assembly (or program-controlled electric component) 8 is accessed from liter
Current lifting device primary circuit in flow standard current transformer 9, from the current lifting device flowed up in standard current transformer 9 simultaneously liter certainly
Standard current transformer and N number of subject current transformer 11 in flow standard current transformer 9 are by a polar end to top side
Formula is connected into closed circuit, and result in formation of the Detection & Controling routes of current transformer.In addition, a of mutual-inductor tester 3 and
X-terminal is correspondingly connected with boosting standard potential transformer 13 certainly by the voltmeter of parallel digital current/voltage table 6, is boosted certainly
The polar end a of standard potential transformer 13 reconnects the K of the polar end a of subject voltage transformer 12, mutual-inductor tester 3UEven
The D of the secondary non-polar end x, mutual-inductor tester 3 that connect subject voltage transformer 12 connect the secondary non-of subject voltage transformer 12
Polar end x connects instrument ground terminal simultaneously and is grounded again, and pressure regulation exports assembly (or program-controlled electric component) 8 and connects A.C. contactor 7
Contact selection switch access from boosting standard potential transformer 13 in booster primary circuit, from boost normal voltage mutual inductance
Booster in device 13 is simultaneously the standard potential transformer and subject voltage transformer in boosting standard potential transformer 13 certainly
12 in such a way that polar end interconnects and non-polar end is interconnected and is grounded parallel connection formation closed circuit, such shape
At the Detection & Controling route of voltage transformer.
Current transformer detection process: program control instrument 4 be the touch screen comprising PLC programmable controller and its programming Control and
The composition such as Acquisition Circuit, program control instrument 4 receive the operating instruction of host computer 2, and return 2 data information of host computer simultaneously, number electricity
The ammeter of stream/voltmeter 6 is synchronous with mutual-inductor tester 3 to be received from up-flow 9 Plays mutual inductance of standard current transformer certainly
Device rated secondary current signal is converted into the signal that digital signal passes through PLC communication in RS485 interface and program control instrument 4 again, program-controlled
PLC real-time reception signal in instrument 4 passes through the instruction shape of control mutual-inductor tester 3 manually or automatically respectively of programming
State, the load switching of current transformer load box 5, the contact on-off of A.C. contactor 7, pressure regulation output assembly (or program-controlled electronic
Source) 8 output voltages high low adjustment to make the N number of subject Current Mutual Inductance of connecting from the current lifting device for flowing up standard current transformer 9
The primary current of device 11 is gone up and down and synchronous electromagnetic induction is to all Current Transformer Secondary sides, the secondary pumping of standard current transformer
The no-load voltage ratio conversion of head group 15 is to make from the standard current transformer and N number of subject Current Mutual Inductance for flowing up standard current transformer 9
Punching one by one that 11 no-load voltage ratio of device is consistent, the station make-before-break of the N number of subject current transformer 11 in parallel of secondary station N station group 10 is delayed
The switching of formula current transformer cis-position is surveyed so as to error testing sampling site, standard and subject Current Transformer Secondary side in each regulation
The electric current that pilot is come by primary side electromagnetic induction flows point-by-point synchronous cis-position with difference and is transmitted to 3 calculation process of mutual-inductor tester,
Data of 3 analog signals received of mutual-inductor tester by A/D conversion Jing Guo microprocessor calculation process, which synchronize, to be passed back
The judgement reprocessing of host computer 2, to realize that batch examines and determine the purpose of straight-through current transformer.
Embodiment 2: please referring to Fig. 5, Fig. 2, Fig. 6, Fig. 7, and the present invention provides another technical solution: one kind is based on PLC
The full-automatic calibrating installation of batch current transformer of control, accurately controls two including controlling based on PLC and connecing secondary terminals
Secondary impedance can realize the device 1 (hereinafter referred to as: device 1) that batch straight-through current transformer is automatically examined and determine, and described device 1 is total
It is made of in body structure computer desk, master station and secondary station.The upper of ct calibrating management system software is installed on computer desk
Position machine 2, host computer 2 pass through RS232 interface both-way communication with PLC in program control instrument 4 in master station；Master station is equipped with mutual inductor school
Test instrument 3, program control instrument 4, current transformer load box 5, voltage transformer Burden box 14, A.C. contactor 7, pressure regulation output assembly
(or program-controlled electric component) 8；Secondary station is shown in Fig. 2 configuration from up-flow standard current transformer 9, secondary station N station group 10, certainly boosting mark
Quasi- voltage transformer 13 (the high-voltage safety required distance of safety is general individually external beside secondary station), standard current transformer
Secondary tap group 15.PLC and mutual-inductor tester 3 pass through RS232 interface both-way communication, are also respectively connected with control in program control instrument 4
Current transformer load box 5, A.C. contactor 7, pressure regulation output assembly (or program-controlled electric component) 8, up-flow normalized current mutual inductance certainly
Device 9, secondary station N station group 10, voltage transformer Burden box 14, the secondary tap group 15 of standard current transformer, transducer check
The T of instrument 30No. 9 two nonpolarity of standard current transformer are flowed up with oneself again by the connection secondary tap group 15 of standard current transformer
Hold KXIt connects, the T of mutual-inductor tester 3XIt connects with current transformer load box 5 N number of subject with secondary station N station group 10 again
11 non-polar end station relay of current transformer corresponds to N number of normally opened contact and is connected in parallel to dock N number of subject Current Mutual Inductance
The K of the secondary non-polar end S2 of device 11, mutual-inductor tester 3iConnection flows up 9 secondary polarity end K1 of standard current transformer again certainly
The secondary polarity end S1 of N number of subject current transformer 11 in parallel, the D connection instrument ground terminal of mutual-inductor tester 3 are grounded again,
The contact selection switch access that pressure regulation exports the connection A.C. contactor 7 of assembly (or program-controlled electric component) 8 is mutual from normalized current is flowed up
Current lifting device primary circuit in sensor 9, from the current lifting device flowed up in standard current transformer 9 simultaneously mutual from up-flow normalized current
Standard current transformer and N number of subject current transformer 11 in sensor 9 are connected into closure to top mode by a polar end
Circuit, result in formation of the Detection & Controling routes of current transformer.In addition, a and x-terminal of mutual-inductor tester 3 and liter certainly
Pressure standard potential transformer 13 is correspondingly connected with, reconnects subject mutual induction of voltage from the polar end a of boosting standard potential transformer 13
The K of the polar end a of device 12, mutual-inductor tester 3USecondary non-polar end x, the transducer check of connection subject voltage transformer 12
The D of instrument 3 meets the secondary non-polar end x of subject voltage transformer 12 while connecting instrument ground terminal and is grounded again, and pressure regulation output is total
The contact selection switch access of A.C. contactor 7 is connected from boosting standard potential transformer 13 at (or program-controlled electric component) 8
Booster primary circuit, from the booster in the standard potential transformer 13 that boosts simultaneously from boosting standard potential transformer 13
Standard potential transformer and subject voltage transformer 12 interconnected by polar end and non-polar end interconnection simultaneously
The mode parallel connection of ground connection forms closed circuit, and result in formation of the Detection & Controling routes of voltage transformer.
Current transformer detection process: program control instrument 4 be the touch screen comprising PLC programmable controller and its programming Control and
The composition such as Acquisition Circuit, program control instrument 4 receive the operating instruction of host computer 2, and return 2 data information of host computer, program control instrument 4 simultaneously
The error op data of mutual-inductor tester 3, program control instrument 4 are controlled and received by RS232 both-way communication with mutual-inductor tester 3
In PLC real-time reception mutual-inductor tester 3 signal and by programme instruction respectively control mutual-inductor tester 3 manually
Or automatically state, the load switching of current transformer load box 5, the contact on-off of A.C. contactor 7, pressure regulation export assembly
The high low adjustment of (or program-controlled electric component) 8 output voltages is to make N number of quilt of connecting from the current lifting device for flowing up standard current transformer 9
It tries the primary current lifting of current transformer 11 and synchronous electromagnetic induction is mutual to all Current Transformer Secondary sides, normalized current
The no-load voltage ratio conversion of the secondary tap group 15 of sensor is to make from the standard current transformer and N number of quilt for flowing up standard current transformer 9
Examination 11 no-load voltage ratio of current transformer is consistent, the station make-before-break of the N number of subject current transformer 11 in parallel of secondary station N station group 10 is prolonged
When one by one cis-position switch, standard and subject Current Transformer Secondary side each regulation test point pass through primary side electromagnetic induction
The electric current to come over flows point-by-point synchronous cis-position with difference and is transmitted to mutual-inductor tester 3,3 analog signals received of mutual-inductor tester
The data Jing Guo microprocessor calculation process are converted by A/D to judge to reprocess to host computer 2 by 4 synchronous driving of program control instrument,
To realize that batch examines and determine the purpose of straight-through current transformer.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of full-automatic calibrating installation of batch current transformer based on PLC control, including being controlled based on PLC and connect secondary
Terminal and the device (1) that batch straight-through current transformer is automatically examined and determine can be realized by accurately controlling secondary impedance, feature exists
In: it is made of in described device (1) overall structure computer desk, master station and secondary station.Ct calibrating is installed on computer desk
The host computer (2) of management system software passes through with PLC in mutual-inductor tester in master station (3) and program control instrument (4) respectively
RS232 interface both-way communication；Master station be equipped with mutual-inductor tester (3), program control instrument (4), current transformer load box (5),
Digital current/voltmeter (6), A.C. contactor (7), pressure regulation output assembly (or program-controlled electric component) (8)；Secondary station configuration rises certainly
Flow standard current transformer (9), secondary station N station group (10), certainly boosting standard potential transformer (13), voltage transformer load
Case (14), the secondary tap group of standard current transformer (15).Digital current/voltmeter (6) passes through RS485 interface and program control instrument
(4) PLC is communicated in, in program control instrument (4) PLC be also respectively connected with control mutual-inductor tester (3), current transformer load box (5),
A.C. contactor (7), pressure regulation output assembly (or program-controlled electric component) (8), certainly up-flow standard current transformer (9), secondary station N work
Hyte (10), voltage transformer Burden box (14), the secondary tap group of standard current transformer (15), mutual-inductor tester (3)
T0It is risen again with oneself by the ammeter connection secondary tap group of standard current transformer (15) of series connection digital current/voltmeter (6)
The secondary non-polar end K of flow standard current transformer (9)XIt connects, the T of mutual-inductor tester (3)XBy with current transformer load
Case (5) series connection N corresponding with N number of subject current transformer (11) non-polar end station relay of secondary station N station group (10) again
A normally opened contact is connected in parallel to dock secondary non-polar end S2, the mutual-inductor tester of N number of subject current transformer (11)
(3) KiConnection from up-flow standard current transformer (9) secondary polarity end K1 again it is in parallel it is N number of subject current transformer (11) two
Secondary polar end S1, mutual-inductor tester (3) D connection instrument ground terminal be grounded again, pressure regulation exports assembly (or program-controlled electronic
Source) (8) connection A.C. contactor (7) contact selection switch access from up-flow standard current transformer (9) in current lifting device one
Minor loop, from the current lifting device flowed up in standard current transformer (9) simultaneously the standard in up-flow standard current transformer (9) certainly
Current transformer is connected into closed circuit, such shape to top mode by a polar end with N number of subject current transformer (11)
At the Detection & Controling route of current transformer.
2. a kind of full-automatic calibrating installation of batch current transformer based on PLC control according to claim 1, feature
Be: the program control instrument (4) is the compositions such as touch screen and Acquisition Circuit comprising PLC programmable controller and its programming Control,
Program control instrument (4) receives the operating instruction of host computer (2), ammeter and mutual-inductor tester (3) of digital current/voltmeter (6)
Synchronous receive is converted into digital signal from up-flow standard current transformer (9) Plays mutual inductor rated secondary current signal certainly
Again by the signal of PLC communication in RS485 interface and program control instrument (4), the PLC real-time reception signal in program control instrument (4) passes through
The state, current transformer load box (5) instructed control mutual-inductor tester (3) respectively manually or automatically of programming is born
Switching, the contact on-off of A.C. contactor (7), the high low adjustment of pressure regulation output assembly (8) output voltage are carried to make to flow up certainly
The primary current of N number of subject current transformer (11) of current lifting device series connection of standard current transformer (9) is gone up and down and synchronous electromagnetism
Sense the no-load voltage ratio conversion of all Current Transformer Secondary sides, the secondary tap group of standard current transformer (15) to make to flow up certainly
The standard current transformer of standard current transformer (9) is consistent with N number of subject current transformer (11) no-load voltage ratio, secondary station N station
Straight-through current transformer cis-position switches one by one for the station make-before-break delay of group (10) N number of subject current transformer (11) in parallel
So as to error testing sampling site, standard and subject Current Transformer Secondary side are passed through the sense of primary side electromagnetism in each regulation test point
The electric current that should come and difference flow point-by-point synchronous cis-position and are transmitted to mutual-inductor tester (3) calculation process, and mutual-inductor tester (3) is connecing
The analog signal received, which by A/D is converted data Jing Guo microprocessor calculation process and synchronized, to be passed host computer (2) back and judges to locate again
Reason, to realize that batch examines and determine the purpose of straight-through current transformer.
3. a kind of full-automatic calibrating installation of batch current transformer based on PLC control according to claim 1, feature
It is: the station make-before-break delay of the secondary station N station group (10) N number of subject current transformer (11) in parallel station one by one
Cis-position switching, switching station technical methods by 5~10 milliseconds of make-before-breaks of PLC programming Control delay in program control instrument (4) ensures
Sorrow of the current transformer without second open circuit.
4. a kind of full-automatic calibrating installation of batch current transformer based on PLC control according to claim 1, feature
It is: including being controlled based on PLC and connecing secondary terminals and batch centre path current mutual inductance can be realized by accurately controlling secondary impedance
The device (1) that device is automatically examined and determine is made of computer desk, master station and secondary station in described device (1) overall structure.Computer desk
On the host computer (2) of ct calibrating management system software is installed, PLC is logical in program control instrument (4) in host computer (2) and master station
Cross RS232 interface both-way communication；Master station is equipped with mutual-inductor tester (3), program control instrument (4), current transformer load box
(5), A.C. contactor (7), pressure regulation output assembly (or program-controlled electric component) (8)；Secondary station configuration up-flow normalized current mutual inductance certainly
Device (9), secondary station N station group (10), certainly boosting standard potential transformer (13), voltage transformer Burden box (14), standard electric
The secondary tap group of current transformer (15).In program control instrument (4) PLC and mutual-inductor tester (3) by RS232 interface both-way communication,
It is also respectively connected with control current transformer load box (5), A.C. contactor (7), pressure regulation output assembly (or program-controlled electric component)
(8), mutual from up-flow standard current transformer (9), secondary station N station group (10), voltage transformer Burden box (14), normalized current
The secondary tap group of sensor (15), the T of mutual-inductor tester (3)0Again by the connection secondary tap group of standard current transformer (15)
With up-flow standard current transformer (9) secondary non-polar end K certainlyXIt connects, the T of mutual-inductor tester (3)XIt is negative with current transformer
Lotus case (5) series connection is corresponding with N number of subject current transformer (11) non-polar end station relay of secondary station N station group (10) again
N number of normally opened contact is connected in parallel to dock secondary non-polar end S2, the mutual-inductor tester of N number of subject current transformer (11)
(3) KiConnection from up-flow standard current transformer (9) secondary polarity end K1 again it is in parallel it is N number of subject current transformer (11) two
Secondary polar end S1, mutual-inductor tester (3) D connection instrument ground terminal be grounded again, pressure regulation exports assembly (or program-controlled electronic
Source) (8) connection A.C. contactor (7) contact selection switch access from up-flow standard current transformer (9) in current lifting device one
Minor loop, from the current lifting device flowed up in standard current transformer (9) simultaneously the standard in up-flow standard current transformer (9) certainly
Current transformer is connected into closed circuit, such shape to top mode by a polar end with N number of subject current transformer (11)
At the Detection & Controling route of current transformer.
5. a kind of full-automatic calibrating installation of batch current transformer based on PLC control according to claim 4, feature
Be: the program control instrument (4) is the compositions such as touch screen and Acquisition Circuit comprising PLC programmable controller and its programming Control,
Program control instrument (4) receives the operating instruction of host computer (2) and returns host computer (2) data information, program control instrument (4) and mutual inductor simultaneously
Tester (3) controls by RS232 both-way communication and receives the error op data of mutual-inductor tester (3), in program control instrument (4)
PLC real-time reception mutual-inductor tester (3) signal and by programme instruct respectively control mutual-inductor tester (3) hand
Dynamic or automatic state, the load switching of current transformer load box (5), the contact on-off of A.C. contactor (7), pressure regulating feeding
The high low adjustment of assembly (or program-controlled electric component) (8) output voltage is out to make from the up-flow for flowing up standard current transformer (9)
The primary current lifting of N number of subject current transformer (11) of device series connection and synchronous electromagnetic induction is to all Current Transformer Secondaries
The no-load voltage ratio conversion of side, the secondary tap group of standard current transformer (15) is to make from the standard for flowing up standard current transformer (9)
Current transformer is consistent with N number of subject current transformer (11) no-load voltage ratio, secondary station N station group (10) N number of subject electric current in parallel is mutual
Cis-position switches one by one for the station make-before-break delay of sensor (11), standard and subject Current Transformer Secondary side in each regulation
The electric current that test point is come by primary side electromagnetic induction flows point-by-point synchronous cis-position with difference and is transmitted at mutual-inductor tester (3) operation
Reason, mutual-inductor tester (3) pass through the analog signal received by the data that A/D is converted Jing Guo microprocessor calculation process
Program control instrument (4) synchronous driving judges to reprocess to host computer (2), to realize that batch examines and determine the mesh of straight-through current transformer
's.
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| CN201811638629.3A CN109407036B (en) | 2018-12-29 | 2018-12-29 | Full-automatic calibrating device of batch current transformer based on PLC control |
| PCT/CN2019/082002 WO2020133796A1 (en) | 2018-12-29 | 2019-04-10 | Plc control-based full-automatic batch current transformer verification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811638629.3A CN109407036B (en) | 2018-12-29 | 2018-12-29 | Full-automatic calibrating device of batch current transformer based on PLC control |
Publications (2)
| Publication Number | Publication Date |
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| CN109407036A true CN109407036A (en) | 2019-03-01 |
| CN109407036B CN109407036B (en) | 2023-12-15 |
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| WO (1) | WO2020133796A1 (en) |
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|---|---|
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| WO2020133796A1 (en) | 2020-07-02 |
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