CN211375033U - 60HZ current transformer calibration device - Google Patents
60HZ current transformer calibration device Download PDFInfo
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- CN211375033U CN211375033U CN201922343049.8U CN201922343049U CN211375033U CN 211375033 U CN211375033 U CN 211375033U CN 201922343049 U CN201922343049 U CN 201922343049U CN 211375033 U CN211375033 U CN 211375033U
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Abstract
The utility model relates to a 60HZ current transformer check-up calibrating installation, include: 60HZ current transformer check gauge, 60HZ current transformer load box, standard current transformer, rise a class ware, voltage regulator, IGBT module, 60HZ current transformer check gauge respectively with 60HZ current transformer load box standard current transformer rise a class ware the voltage regulator reaches the IGBT module is connected. A60 HZ current transformer check-up calibrating installation, perfect internal blank to 60HZ current transformer on the inspection, promoted the precision value at current transformer check-up examination effectively.
Description
Technical Field
The utility model belongs to the check out test set field especially relates to a 60HZ current transformer check-up calibrating installation.
Background
The mutual inductor for power system is a special transformer for transmitting the information of high voltage and large current of power network to the metering and measuring instrument of low voltage and small current secondary side and relay protection and automatic device, and its performance directly affects the accuracy of measurement and metering of power system and the reliability of action of relay protection device.
At present, a transformer calibrator in the market can only test the transformer error under the condition of power frequency 50Hz operation basically, and no transformer calibrator under the condition of 60Hz frequency operation exists. At present, current transformer testing equipment running at 60Hz needs to be researched, and a novel transformer calibrator is developed to test the error condition of a current transformer at 60 Hz.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned current situation, provide a 60HZ current transformer check-up calibrating installation.
The utility model adopts the technical proposal that: a60 HZ current transformer calibration device comprises: a 60HZ current transformer calibrator, a 60HZ current transformer load box, a standard current transformer, a current booster, a voltage regulator and an IGBT module, the 60HZ current transformer calibrator is respectively connected with the 60HZ current transformer load box, the standard current transformer, the current booster, the voltage regulator and the IGBT module, the primary winding of the standard current transformer, the primary winding of the current transformer to be tested and the primary winding of the current booster are sequentially connected in series to form a loop, the first end of the secondary winding of the standard current transformer is electrically connected with the 60HZ current transformer calibrator, the current transformer to be tested is electrically connected with the second end of the secondary winding of the standard current transformer, and with 60HZ current transformer calibrator is connected, 60HZ current transformer load box is connected with the current transformer that awaits measuring, the secondary winding of current rising ware with the voltage regulator is established ties in proper order and is formed the return circuit.
The utility model has the effects that: a60 HZ current transformer check-up calibrating installation, perfect internal blank to 60HZ current transformer on the inspection, promoted the precision value at current transformer check-up examination effectively.
Drawings
Fig. 1 is a schematic diagram of a 60HZ current transformer calibration device provided by the present invention;
FIG. 2 is a schematic block diagram of the 60HZ current transformer calibrator of FIG. 1;
fig. 3 is a schematic structural diagram of the resistance-inductance assembly.
Detailed Description
The utility model provides a 60HZ current transformer check-up calibrating installation is introduced below in combination with the figure:
referring to fig. 1-3, in order to provide the present invention, a calibration apparatus for checking 60HZ current transformer includes: 60HZ current transformer check gauge 1, 60HZ current transformer load box 2, standard current transformer 3, current rise 4, voltage regulator 5, IGBT module 6, man-machine interaction interface 7, computer 8, man-machine interaction interface 7 with computer 8 docks, computer 8 with 60HZ current transformer check gauge 1 is connected, 60HZ current transformer check gauge 1 respectively with 60HZ current transformer load box 2 standard current transformer 3 current rise 4 the voltage regulator 5 reaches IGBT module 6 is connected.
The primary winding of standard current transformer 3, the primary winding of the current transformer that awaits measuring and the primary winding of current booster 4 establishes ties in proper order and forms the return circuit, the primary end of the secondary winding of standard current transformer 3 with 1 electricity of 60HZ current transformer check gauge is connected, the current transformer that awaits measuring with the second end electricity of the secondary winding of standard current transformer 3 is connected, and with 60HZ current transformer check gauge 1 is connected, 60HZ current transformer load box 2 is connected with the current transformer that awaits measuring, current booster 4 the secondary winding with the voltage regulator establishes ties in proper order and forms the return circuit.
The 60HZ current transformer calibrator 1 comprises an electric appliance converter 11, a first amplifying circuit 12, a first filter circuit 13, a first A/D converter 14, a second A/D converter 15, a second amplifying circuit 16, a second filter circuit 17, a third amplifying circuit 18 and a data processing module 19, wherein the electric appliance converter 11, the first amplifying circuit 12, the first filter circuit 13 and the first A/D converter 14 are sequentially connected, the second amplifying circuit 16, the second filter circuit 17, the third amplifying circuit 18 and the second A/D converter 15 are sequentially connected, and the first A/D converter 14 and the second A/D converter 15 are connected with the data processing module 19.
60HZ current transformer check gauge 1 passes through electric converter 11 conversion becomes voltage signal, through first amplifier circuit 12, send into after the amplification of first filter circuit 13, filtering 14 carries out AD sampling, transformer secondary current signal passes through second amplifier circuit 16, second filter circuit 17, get into after the amplification of third amplifier circuit 18, filtering 15 carries out AD sampling, and two way signals pass through the sampling calculation of 128 points sampling rate of 50 cycles, separate out the specific value difference and the phase difference of test current.
The first a/D converter 14 and the second a/D converter 15 use AD707 chips.
The 60HZ current transformer load box 2 comprises a resistance-inductance group 21 and a control chip 22, the overall resistance and the inductance of the resistance-inductance group 21 are adjustable, and the control chip 22 is connected with the resistance-inductance group 21 and used for adjusting the overall resistance and the inductance of the resistance-inductance group 21.
The resistance inductance group 21 includes relays J1 to J13, terminals T1 to T2, resistors R1 to R13, and reactances L1 to L4, the terminal T1 is connected to one end of the reactance L1 and one end of the resistor R1, the other end of the reactance L1 is connected to one end of a resistor R5, the other end of the resistor R5 is connected to one end of the reactance L2 and the relay J12, the other end of the reactance L2 is connected to the resistor R6, one end of the resistor R6 is connected to one end of the reactance L3 and the relay J11, the other end of the reactance L3 is connected to one end of the resistor R7, the other end of the resistor R7 is connected to the reactance L4 and the relay J10, the other end of the reactance L4 is connected to one end of the resistor R8, the other end of the resistor R8 is connected to one end of the normally open relay J9, and the other end of the resistor R1 is connected to one end of the resistor R2, One end of the relay J1 is connected, the other end of the resistor R2 is connected with one end of the resistor R3 and one end of the relay J2, the other end of the resistor R3 is connected with one end of the resistor R4 and one end of the relay J3, the other end of the resistor R4 is connected with one end of the relay J4, the other end of the resistor R5 is connected with the relay J12, a tap of the reactance L1 is connected to one end of the resistor R12, the other end of the resistor R12 is connected to one end of the relay J5, a tap of the reactance L2 is connected to one end of the resistor R11, the other end of the resistor R11 is connected to one end of the relay J6, a tap of the reactance L3 is connected to one end of the resistor R10, the other end of the resistor R10 is connected to one end of the relay J7, a tap of the reactance L4 is connected to one end of the resistor R9, and the other end of the resistor R9 is connected to one end of the relay J8. The other ends of the relays J1, J2, J3 and J4 are connected to the terminal T2, the terminal T2 is connected to one end of the relay J13, and the other ends of the relays J5, J6, J7, J8, J9, J10, J11 and J12 are connected to the other end of the relay J13.
The relays J1-J13 are connected with the control chip 22.
The control chip 22 is TMS320F 28335.
The cross section of the resistors R1-R13 is 1.2mm2Manganese copper wire.
The cross-sectional area of the reactance L1-L4 is 1.2mm2The enameled copper wire winding core is composed of an inductance magnetic core consisting of non-closed silicon steel sheet laminations, and the sectional area of the inductance magnetic core is 300mm2。
The I GBT conversion module 6 converts 50HZ electricity into 60HZ electricity, is connected with the 60HZ current transformer calibrator 1 for control, and the output is detected by the 60HZ current transformer calibrator 1 to form a mutual feedback control system.
During the use, with the current transformer that is surveyed with 60HZ current transformer check gauge 1 is connected, 60HZ current transformer check gauge 1 passes through the error current signal of the two the electric converter 11 conversion becomes voltage signal, sends into after the amplification of first amplifier circuit 12, first filter circuit 13, filtering processing first A/D converter 14 carries out AD sampling, passes through mutual-inductor secondary current signal second amplifier circuit 16, second filter circuit 17, get into after the amplification of third amplifier circuit 18, filtering processing second A/D converter 15 carries out AD sampling, and two way signals pass through the sampling calculation of the 128 some sampling rates of 50 cycles, separate out the ratio difference and the phase difference of test current.
The measured specific difference and angular difference data of the existing current transformer under a 50HZ current transformer calibrator, a 50HZ current load box and a 50HZ program control source and the measured specific difference and angular difference data under a 60HZ current transformer calibrator, a 60HZ current load box and a 60HZ program control source are compared as follows:
through theoretical derivation and experimental verification, the error measurement system design is developed by combining an error detection test under 60 Hz. It can be seen that the power frequency has a certain influence on the error, and for the current transformer, the power frequency is reduced, so that the error becomes larger. In terms of numerical relation, the excitation current of the original 50Hz standard current transformer at 60Hz is 0.833 times that of the original 50Hz standard current transformer, namely, in a certain frequency range, the precision of the current transformer is improved due to the increase of the frequency.
A60 HZ current transformer check-up calibrating installation, perfect internal blank to 60HZ current transformer on the inspection, promoted the precision value at current transformer check-up examination effectively.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. The utility model provides a 60HZ current transformer check-up calibrating installation which characterized in that includes: a 60HZ current transformer calibrator, a 60HZ current transformer load box, a standard current transformer, a current booster, a voltage regulator and an IGBT module, the 60HZ current transformer calibrator is respectively connected with the 60HZ current transformer load box, the standard current transformer, the current booster, the voltage regulator and the IGBT module, the primary winding of the standard current transformer, the primary winding of the current transformer to be tested and the primary winding of the current booster are sequentially connected in series to form a loop, the first end of the secondary winding of the standard current transformer is electrically connected with the 60HZ current transformer calibrator, the current transformer to be tested is electrically connected with the second end of the secondary winding of the standard current transformer, and with 60HZ current transformer calibrator is connected, 60HZ current transformer load box is connected with the current transformer that awaits measuring, the secondary winding of current rising ware with the voltage regulator is established ties in proper order and is formed the return circuit.
2. The 60HZ current transformer calibration device according to claim 1, wherein the 60HZ current transformer calibration instrument comprises an electrical converter, a first amplifying circuit, a first filter circuit, a first a/D converter, a second amplifying circuit, a second filter circuit, a third amplifying circuit and a data processing module, the electrical converter, the first amplifying circuit, the first filter circuit and the first a/D converter are sequentially connected, the second amplifying circuit, the second filter circuit, the third amplifying circuit and the second a/D converter are sequentially connected, and the first a/D converter and the second a/D converter are connected with the data processing module.
3. The 60HZ current transformer calibration and verification device according to claim 2, wherein the 60HZ current transformer load box comprises a resistance-inductance group and a control chip, the overall resistance and inductance of the resistance-inductance group are adjustable, and the control chip is connected with the resistance-inductance group and is used for adjusting the overall resistance and inductance of the resistance-inductance group.
4. The 60HZ current transformer verification and verification device as claimed in claim 3, wherein the resistance inductance set comprises a relay J1-J13, a terminal T1-T2, a resistor R1-R13, and a reactance L1-L4, one end of the terminal T1 connected with the reactance L1 is connected with one end of the resistor R1, the other end of the reactance L1 is connected with one end of a resistor R5, the other end of the resistor R5 is connected with one end of the reactance L2 and the relay J12, the other end of the reactance L2 is connected with the resistor R6, one end of the resistor R6 is connected with one end of the reactance L3 and the relay J11, the other end of the reactance L3 is connected with one end of the resistor R7, the other end of the resistor R7 is connected with the reactance L4 and the relay J10, the other end of the reactance L4 is connected with one end of the resistor R8, the other end of the resistor R8 is connected with one end of the relay 9, the other end of the resistor R1 is connected to one end of the resistor R2 and one end of the relay J1, the other end of the resistor R2 is connected to one end of the resistor R3 and one end of the relay J2, the other end of the resistor R3 is connected to one end of the resistor R4 and one end of the relay J3, the other end of the resistor R4 is connected to one end of the relay J4, the other end of the resistor R5 is connected to the relay J12, a tap of the reactance L1 is connected to one end of the resistor R12, the other end of the resistor R12 is connected to one end of the relay J5, a tap of the reactance L2 is connected to one end of the resistor R11, the other end of the resistor R11 is connected to one end of the relay J6, a tap of the reactance L3 is connected to one end of the resistor R10, the other end of the resistor R10 is connected to one end of the relay J7, and a tap of the reactance L4 is connected to one end of the resistor R9, the other end of the resistor R9 is connected with one end of a relay J8, the other ends of the relays J1, J2, J3 and J4 are connected with the terminal T2, the terminal T2 is connected with one end of the relay J13, and the other ends of the relays J5, J6, J7, J8, J9, J10, J11 and J12 are connected with the other end of the relay J13.
5. The 60HZ current transformer calibration and verification device as claimed in claim 1, wherein said IGBT conversion module converts 50HZ electricity into 60HZ, and is connected to and controlled by said 60HZ current transformer calibrator, and the output is detected by said 60HZ current transformer calibrator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922343049.8U CN211375033U (en) | 2019-12-23 | 2019-12-23 | 60HZ current transformer calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922343049.8U CN211375033U (en) | 2019-12-23 | 2019-12-23 | 60HZ current transformer calibration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211375033U true CN211375033U (en) | 2020-08-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922343049.8U Active CN211375033U (en) | 2019-12-23 | 2019-12-23 | 60HZ current transformer calibration device |
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| CN (1) | CN211375033U (en) |
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- 2019-12-23 CN CN201922343049.8U patent/CN211375033U/en active Active
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