CN105929354B - Great current mutual inductor automatic calibrator and method - Google Patents
Great current mutual inductor automatic calibrator and method Download PDFInfo
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- CN105929354B CN105929354B CN201610500596.0A CN201610500596A CN105929354B CN 105929354 B CN105929354 B CN 105929354B CN 201610500596 A CN201610500596 A CN 201610500596A CN 105929354 B CN105929354 B CN 105929354B
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- 238000004891 communication Methods 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 3
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Classifications
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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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Abstract
The present invention relates to a kind of great current mutual inductor automatic calibrator, pressure regulator, current lifting device, standard current transformer, switch controller, secondary connection control module, current transformer calibrator, control computer and current capacity casees.Great current mutual inductor automatic calibrator provided by the invention and method, it is integrated to realize great current mutual inductor calibration equipment, and the primary circuit of the device and secondary circuit energy automatic connection, the automatic Verification that can also complete subject current transformer improves safety and the calibrating efficiency of detecting current transformer work.
Description
Technical field
The present invention relates to Electric Measurement Technology fields, and in particular to a kind of great current mutual inductor automatic calibrator and method.
Background technology
Great current mutual inductor is mainly used in energy metering, and electric current maximum can reach tens of thousands of amperes, and accuracy is straight
Connect fair, just and electric power enterprise the economic benefit for being related to metering.
Currently, great current mutual inductor calibration operation is mainly carried out according to JJG1021-2007 vertification regulations, calibration equipment
Including manual voltage regulator, capacitor compensation cabinet, current lifting device, standard current transformer, subject mutual inductor, current capacity case and electric current
Mutual-inductor tester, each equipment are dispersions, are not an organic wholes, and experimentation needs manually wiring to carry out each
The experiment of regulation point, the degree of automation is low, and safety is low.
Invention content
The purpose of the present invention is to provide a kind of great current mutual inductor automatic calibrator and method, the device and method energy
It realizes the automatic Verification of great current mutual inductor, improves calibration operation efficiency and safety.
In order to solve the above technical problems, a kind of great current mutual inductor automatic calibrator disclosed by the invention, it includes adjusting
Depressor, current lifting device, standard current transformer, switch controller, secondary connection control module, current transformer calibrator, control
Computer and current capacity case, wherein the primary connection AC power of the pressure regulator, the secondary connection current lifting device of pressure regulator
Primary, one end of one end connection standard current transformer primary of current lifting device secondary, the other end connecting wire of current lifting device secondary
One end of link block, one end of the other end connection subject current transformer primary of conducting wire link block, is tested Current Mutual Inductance
The other end of the other end connection standard current transformer primary of device primary, the control signal input connection of conducting wire link block
The control signal output of switch controller, the one end for being tested secondary transformer connect electricity by secondary connection control module
One end of stream load case, the secondary subject connecting terminal TX of the other end connection current transformer calibrator of current capacity case, quilt
The other end for trying secondary transformer connects the difference stream branch letter of current transformer calibrator by secondary connection control module
Number flow into terminal K, standard current transformer secondary one end connection subject secondary transformer the other end, normalized current mutual inductance
The other end of device secondary connects the secondary standard connecting terminal T0 of current transformer calibrator, electricity by secondary connection control module
The ground terminal of the difference stream tributary signal outflow terminal D connection current transformer calibrators of current transformer tester, control computer
Switch control signal output end connecting valve controller control signal input, the rated load of current transformer calibrator
Parameter output connects the rated load parameter input end of current capacity case, and the pressure regulator of current transformer calibrator controls signal
Output end connects the control signal input of pressure regulator.
A kind of automatic Verification method using above-mentioned great current mutual inductor automatic calibrator, which is characterized in that it includes
Following steps：
Step 1：Open the switch of current transformer calibrator；
Step 2：It is closed by control computer Operation switch controller pilot link block；
Step 3：According to subject current transformer nameplate, primary current parameter, secondary current ginseng are set in control computer
Number, rated load parameter, lower limit load parameter, class of accuracy parameter and power factor parameter；
Step 4：Control computer is by by above-mentioned primary current parameter, secondary current parameter, rated load parameter, lower limit
Load parameter, class of accuracy parameter and power factor parameter are delivered to current transformer calibrator；
Step 5：Power factor (PF) parameter is transferred to capacitor compensation cabinet by current transformer calibrator, capacitor compensation cabinet according to
The power factor (PF) state modulator calibrating power loop factor arrived；
Step 6：Rated load parameter is transmitted to current capacity case by current transformer calibrator, current capacity case according to
The rated load parameter setting calibrating circuit load parameter arrived；
Step 7：Current transformer calibrator control pressure regulator is flowed up successively to JJG1021-2007《Electric power mutual-inductor is examined and determine
Regulation》Defined following rated current percentage 1%, 5%, 20%, 100% and 120%, current transformer calibrator is remembered automatically
Record subject operation of current transformers is tested current transformer error value in above each rated current percentage, and by the quilt of record
Examination current transformer error value is transmitted to control computer；
Step 8：Current transformer calibrator controls pressure regulator and is down to 0V by loop voltage is examined and determine；
Step 9：Lower limit load parameter is delivered to current capacity case by current transformer calibrator, is set by current capacity case
Set calibrating circuit lower limit load parameter；
Step 10：Repeat step 7 and step 8；
Step 11：Control computer automatically generates probation redport.
Great current mutual inductor automatic calibrator provided by the invention and method, realize great current mutual inductor calibration equipment
It is integrated, and the energy automatic connection of the primary circuit of the device and secondary circuit, moreover it is possible to complete the automatic of subject current transformer
Calibrating improves safety and the calibrating efficiency of detecting current transformer work.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Wherein, 1-pressure regulator, 2-capacitor compensation cabinets, 3-current lifting devices, 4-current capacity casees, 5-normalized current mutual inductances
Device, 6-switch controllers, 7-secondary connection control modules, 8-current transformer calibrators, 9-control computers, 10-are led
Line link block, 11-subject current transformers.
Specific implementation mode
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail：
Great current mutual inductor automatic calibrator of the present invention, it include pressure regulator 1, current lifting device 3, standard current transformer 5,
Switch controller 6, secondary connection control module 7, current transformer calibrator 8, control computer 9 and current capacity case 4,
In, the primary connection AC power of the pressure regulator 1, the primary of the secondary connection current lifting device 3 of pressure regulator 1,3 grades of current lifting device
5 primary one end of one end connection standard current transformer, the one of the other end connecting wire link block 10 of 3 grades of current lifting device
End, one end that the other end connection subject current transformer 11 of conducting wire link block 10 is primary (it is identical to be tested current transformer 11
The terminal of no-load voltage ratio), the primary 5 primary other end of other end connection standard current transformer of subject current transformer 11, conducting wire
The control signal output of the control signal input connecting valve controller 6 of link block 10, subject current transformer 11 times
One end of grade connects one end of current capacity case 4, the other end connection electricity of current capacity case 4 by secondary connection control module 7
The other end of the secondary subject connecting terminal TX of current transformer tester 8, subject 11 grades of current transformer pass through secondary connection
The difference stream tributary signal that control module 7 connects current transformer calibrator 8 flows into terminal K, 5 grade one end of standard current transformer
The other end of connection subject 11 grades of current transformer, the other end of 5 grades of standard current transformer are controlled by secondary connection
Module 7 connects the secondary standard connecting terminal T0 of current transformer calibrator 8, the difference stream branch letter of current transformer calibrator 8
The ground terminal of number outflow terminal D connections current transformer calibrator 8, the switch control signal output end of control computer 9 connect
The rated load parameter output of the control signal input of switch controller 6, current transformer calibrator 8 connects current capacity
The rated load parameter input end of case 4, the pressure regulator control signal output connection pressure regulator 1 of current transformer calibrator 8
Control signal input.
In above-mentioned technical proposal, conducting wire link block 10 facilitates conducting wire when primary connection flexible.Secondary connection controls mould
Block 7 realizes that second loop return wiring automatically switches.
In above-mentioned technical proposal, the ct calibrating no-load voltage ratio switch-over control signal of the current transformer calibrator 8 exports
The ct calibrating no-load voltage ratio switch-over control signal input terminal of end connection secondary connection control module 7.
In above-mentioned technical proposal, it further includes that (capacitor compensation cabinet 2 is used for the idle work(in complementation test circuit to capacitor compensation cabinet 2
Rate, to reduce surge capacity), one end of the first connecting terminal connection 1 grade of pressure regulator of capacitor compensation cabinet 2, capacitance is mended
Repay the other end of the second connecting terminal connection 1 grade of pressure regulator of cabinet 2, the power factor (PF) output end of current transformer calibrator 8
Connect the power factor (PF) input terminal of capacitor compensation cabinet 2.
In above-mentioned technical proposal, the parameter setting communication ends connection current transformer calibrator 8 of the control computer 9
Parameter setting communication ends.
In above-mentioned technical proposal, the primary connection 380V AC powers of the pressure regulator 1.
A kind of automatic Verification method using above-mentioned great current mutual inductor automatic calibrator, it includes the following steps：
Step 1：Open the switch of current transformer calibrator 8；
Step 2：It is closed by 9 Operation switch controller of control computer, 6 pilot link block 10；
Step 3：According to subject 11 nameplate of current transformer, primary current parameter, secondary electricity are set in control computer 9
Flow parameter, rated load parameter, lower limit load parameter, class of accuracy parameter and power factor parameter；
Step 4：Control computer 9 by by above-mentioned primary current parameter, secondary current parameter, rated load parameter, under
Limited load parameter, class of accuracy parameter and power factor parameter are delivered to current transformer calibrator 8；
Step 5：Power factor (PF) parameter is transferred to capacitor compensation cabinet 2, capacitor compensation cabinet 2 by current transformer calibrator 8
Power loop factor is examined and determine according to obtained power factor (PF) state modulator；
Step 6：Rated load parameter is transmitted to current capacity case 4,4, current capacity case by current transformer calibrator 8
Circuit load parameter is examined and determine according to obtained rated load parameter setting；
Step 7：Current transformer calibrator 8 controls pressure regulator 1 and is flowed up successively to JJG1021-2007《Electric power mutual-inductor is examined
Set pattern journey》Defined following rated current percentage 1%, 5%, 20%, 100% and 120%, current transformer calibrator 8 is certainly
Dynamic record subject current transformer 11 is tested 11 error amount of current transformer when being operated in above each rated current percentage, and will
11 error amount of subject current transformer of record is transmitted to control computer 9；
Step 8：Current transformer calibrator 8 controls pressure regulator 1 and is down to 0V by loop voltage is examined and determine；
Step 9：Lower limit load parameter is delivered to current capacity case 4 by current transformer calibrator 8, passes through current capacity case
4 setting calibrating circuit lower limit load parameters；
Step 10：Repeat step 7 and step 8；
Step 11：Control computer 9 automatically generates probation redport；
Step 12：9 Operation switch controller of control computer, 6 pilot link block 10 disconnects；
Step 13：Subject current transformer 11 is taken out, certificate test is completed；
Step 14：Close current transformer calibrator 8.
The present invention can realize the automatic Verification of great current mutual inductor, improve calibration operation efficiency and safety.
The content that this specification is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
Claims (6)
1. a kind of automatic Verification method using great current mutual inductor automatic calibrator, great current mutual inductor automatic calibrator
Including pressure regulator (1), current lifting device (3), standard current transformer (5), switch controller (6), secondary connection control module (7),
Current transformer calibrator (8), control computer (9) and current capacity case (4), wherein the primary connection of the pressure regulator (1)
One end connection normalized current of AC power, the primary of the secondary connection current lifting device (3) of pressure regulator (1), current lifting device (3) secondary is mutual
One end of sensor (5) primary, one end of the other end connecting wire link block (10) of current lifting device (3) secondary, conducting wire connect mould
One end of other end connection subject current transformer (11) primary of block (10), is tested the other end of current transformer (11) primary
Connect the other end of standard current transformer (5) primary, the control signal input connecting valve control of conducting wire link block (10)
The control signal output of device (6) processed, the one end for being tested current transformer (11) secondary are connected by secondary connection control module (7)
Connect one end of current capacity case (4), the secondary subject of the other end connection current transformer calibrator (8) of current capacity case (4)
Connecting terminal TX, the other end for being tested current transformer (11) secondary connect Current Mutual Inductance by secondary connection control module (7)
The difference stream tributary signal of device tester (8) flows into terminal K, standard current transformer (5) secondary one end connection subject Current Mutual Inductance
The other end of the other end of device (11) secondary, standard current transformer (5) secondary connects electricity by secondary connection control module (7)
The secondary standard connecting terminal T0 of current transformer tester (8), the difference stream tributary signal outflow end of current transformer calibrator (8)
The ground terminal of sub- D connections current transformer calibrator (8), the switch control signal output end connecting valve of control computer (9)
The rated load parameter output of the control signal input of controller (6), current transformer calibrator (8) connects current capacity
The pressure regulator control signal output of the rated load parameter input end of case (4), current transformer calibrator (8) connects pressure regulator
(1) control signal input；
It is characterized in that, automatic Verification method, includes the following steps：
Step 1：Open the switch of current transformer calibrator (8)；
Step 2：It is closed by control computer (9) Operation switch controller (6) pilot link block (10)；
Step 3：According to subject current transformer (11) nameplate, primary current parameter, secondary electricity are set in control computer (9)
Flow parameter, rated load parameter, lower limit load parameter, class of accuracy parameter and power factor parameter；
Step 4：Control computer (9) is by by above-mentioned primary current parameter, secondary current parameter, rated load parameter, lower limit
Load parameter, class of accuracy parameter and power factor parameter are delivered to current transformer calibrator (8)；
Step 5：Power factor (PF) parameter is transferred to capacitor compensation cabinet (2), capacitor compensation cabinet (2) by current transformer calibrator (8)
Power loop factor is examined and determine according to obtained power factor (PF) state modulator；
Step 6：Rated load parameter is transmitted to current capacity case (4), current capacity case (4) by current transformer calibrator (8)
Circuit load parameter is examined and determine according to obtained rated load parameter setting；
Step 7：Current transformer calibrator (8) control pressure regulator (1) is flowed up successively to JJG1021-2007《Electric power mutual-inductor is examined
Set pattern journey》Defined following rated current percentage 1%, 5%, 20%, 100% and 120%, current transformer calibrator (8)
It automatically records when subject current transformer (11) is operated in above each rated current percentage and is tested current transformer (11) error
Value, and subject current transformer (11) error amount of record is transmitted to control computer (9)；
Step 8：Current transformer calibrator (8) control pressure regulator (1) is down to 0V by loop voltage is examined and determine；
Step 9：Lower limit load parameter is delivered to current capacity case (4) by current transformer calibrator (8), passes through current capacity case
(4) setting calibrating circuit lower limit load parameter；
Step 10：Repeat step 7 and step 8；
Step 11：Control computer (9) automatically generates probation redport.
2. automatic Verification method according to claim 1, it is characterised in that：The current transformer calibrator (8) it is mutual
Sensor examines and determine the ct calibrating no-load voltage ratio switching control of no-load voltage ratio switch-over control signal output end connection secondary connection control module (7)
Signal input part.
3. automatic Verification method according to claim 1, it is characterised in that：It further includes capacitor compensation cabinet (2), and capacitance is mended
Repay one end of the first connecting terminal connection pressure regulator (1) secondary of cabinet (2), the second connecting terminal connection of capacitor compensation cabinet (2)
The other end of pressure regulator (1) secondary, the power factor (PF) output end connection capacitor compensation cabinet (2) of current transformer calibrator (8)
Power factor (PF) input terminal.
4. automatic Verification method according to claim 1, it is characterised in that：The parameter setting of the control computer (9)
Communication ends connect the parameter setting communication ends of current transformer calibrator (8).
5. automatic Verification method according to claim 1, it is characterised in that：The primary connection 380V of the pressure regulator (1)
AC power.
6. automatic Verification method according to claim 1, it is characterised in that：Further include step 12 after the step 11：Control
Computer (9) Operation switch controller (6) pilot link block (10) processed disconnects；
Step 13：Subject current transformer (11) is taken out, certificate test is completed；
Step 14：Close current transformer calibrator (8).
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| CN201610500596.0A CN105929354B (en) | 2016-06-29 | 2016-06-29 | Great current mutual inductor automatic calibrator and method |
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| CN201610500596.0A CN105929354B (en) | 2016-06-29 | 2016-06-29 | Great current mutual inductor automatic calibrator and method |
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| CN105929354B true CN105929354B (en) | 2018-10-16 |
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