CN113567799A - 10kV capacitor integrated test device and test method thereof - Google Patents
10kV capacitor integrated test device and test method thereof Download PDFInfo
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- CN113567799A CN113567799A CN202111139435.0A CN202111139435A CN113567799A CN 113567799 A CN113567799 A CN 113567799A CN 202111139435 A CN202111139435 A CN 202111139435A CN 113567799 A CN113567799 A CN 113567799A
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
Abstract
The invention provides a 10kV capacitor integrated test device and a test method thereof, and belongs to the technical field of capacitor test. The invention adopts the control circuit module, the alternating current low-voltage module, the alternating current high-voltage module, the direct current high-voltage module and the corresponding switches to respectively realize the capacitance test, the alternating current withstand voltage test and the insulation resistance test of the capacitor, and through the integrated design, the number of instruments required by the test is reduced, the operation is convenient, and the universality is strong. And through setting up wiring control module, can realize automatic wiring, reduced operating personnel's manual wiring number of times, improved work efficiency.
Description
Technical Field
The invention belongs to the technical field of capacitor testing, and particularly relates to a 10kV capacitor integrated testing device and a testing method thereof.
Background
The high-voltage capacitor is a capacitor composed of an outgoing line ceramic bushing, a capacitor element group, a shell and the like. The high-voltage capacitor has the characteristics of low loss and light weight. For production technical reasons, the high-voltage capacitor needs to be subjected to relevant tests before operation so as to check the production quality of the capacitor and ensure the safe operation of the capacitor.
According to the test rule of the 10kV capacitor, a capacitance test, a withstand voltage front pole-to-shell and ground insulation resistance test, a pole-to-shell and ground alternating current withstand voltage test and a withstand voltage back pole-to-shell and ground insulation resistance test are required. The instruments, test wiring, instrument output voltage and test principles used in the test items are different, so that the capacitance of the capacitor needs to be measured by using a capacitance tester on site, then wiring is replaced, the voltage-resistant front electrode-to-shell and ground insulation resistance of the capacitor is measured by using an insulating megohmmeter, then wiring is replaced, an alternating current voltage-resistant device is used for carrying out an electrode-to-shell and ground alternating current voltage-resistant test on the capacitor, finally wiring is replaced, and the voltage-resistant rear electrode-to-shell and ground insulation resistance of the capacitor is measured by using the insulating megohmmeter.
The existing test method needs to use 3 instruments on site, and the instruments and wiring are rotated for 4 times, so that the working efficiency is seriously influenced.
Disclosure of Invention
In view of this, the invention aims to solve the problems of complex test flow and low working efficiency of the existing test method.
In order to solve the technical problems, the invention provides the following technical scheme:
in a first aspect, the present invention provides a 10kV capacitor integration test apparatus, including:
the device comprises a control circuit module, an alternating current low-voltage module, an alternating current high-voltage module, a direct current high-voltage module, a wiring control module, a first output wiring and a second output wiring of the wiring control module, a power switch, a measurement switch and a stop switch;
the control circuit module is used for outputting corresponding control signals according to the capacitance test, the alternating current withstand voltage test and the insulation resistance test, and outputting corresponding test results after acquiring and processing corresponding voltage values and current values;
when the capacitance test is carried out, the control signal is used for controlling the alternating current low-voltage module to output a first test signal, and controlling a first output connection wire and a second output connection wire of the connection wire control module to be respectively connected with two output ends of the alternating current low-voltage module, and the first test signal is used for carrying out the capacitance test;
when the alternating-current voltage withstand test is carried out, the control signal is used for controlling the alternating-current high-voltage module to output a second test signal, the first output connection wire and the second output connection wire of the wiring control module are connected with one output end of the alternating-current high-voltage module after being in short circuit, the other output end of the alternating-current high-voltage module is grounded, and the second test signal is used for carrying out the alternating-current voltage withstand test;
when the insulation resistance test is carried out, the control signal is used for controlling the direct-current high-voltage module to output a third test signal, the first output connection wire and the second output connection wire of the wiring control module are connected with the output negative polarity end of the direct-current high-voltage module after being in short circuit, the output positive polarity end of the direct-current high-voltage module is grounded, and the third test signal is used for carrying out the insulation resistance test;
the power switch is used for controlling the on-off of the power supply, and the measuring switch and the stop switch are respectively used for controlling the start and stop of each test.
And the human-computer interaction module is used for selecting the capacitance test, the alternating current withstand voltage test and the insulation resistance test, outputting corresponding control signals to the control circuit module and displaying corresponding test results.
Furthermore, the man-machine interaction module is provided with an intelligent mode, and the intelligent mode is used for controlling the control circuit module to sequentially perform a capacitance test, an insulation resistance test and an alternating current withstand voltage test.
Further, the power supply module is used for obtaining alternating-current voltage for power supply so as to respectively supply power to the human-computer interaction module, the control circuit module, the alternating-current low-voltage module, the alternating-current high-voltage module and the direct-current high-voltage module.
Further, the alternating current low-voltage module is used for converting alternating current voltage for power supply into preset low-voltage alternating current voltage and outputting the preset low-voltage alternating current voltage as a first test signal.
Further, the alternating current high voltage module is used for converting the alternating current voltage for power supply into a preset high voltage alternating current voltage and outputting the preset high voltage alternating current voltage as a second test signal.
Furthermore, an autotransformer is arranged in the alternating current high-voltage module, the alternating current high-voltage module converts alternating current voltage for power supply in a high-voltage alternating current voltage range through the autotransformer, and the high-voltage alternating current voltage range is determined by inherent parameters of the autotransformer.
Further, the direct current high voltage module is used for converting the alternating current voltage for power supply into a preset high voltage direct current voltage and outputting the preset high voltage direct current voltage as a third test signal.
Furthermore, a diode circuit, a filter capacitor and a voltage stabilizer are arranged in the direct current high voltage module, the direct current high voltage module converts alternating current voltage for power supply into any one of a plurality of preset high voltage direct current voltages through the diode circuit, the filter capacitor and the voltage stabilizer, and the plurality of preset high voltage direct current voltages are determined by the diode circuit, the filter capacitor and the voltage stabilizer.
In a second aspect, the present invention provides a 10kV capacitor integration test method, applied to the 10kV capacitor integration test device of the first aspect, grounding the integration test device, connecting the first output connection and the second output connection of the connection control module to two poles of a capacitor to be tested, and grounding the housing of the capacitor to be tested, including the following steps:
switching on a power switch so as to obtain alternating current voltage for power supply;
starting a test by selecting one of a capacitance test, an alternating-current withstand voltage test and an insulation resistance test and pressing a measurement switch;
when the capacitance test is carried out, if the capacitance value of the capacitor to be tested obtained according to the test result output by the control circuit module does not change, the stop button is pressed to stop the test, and the control circuit module outputs the test result at the moment;
when an alternating current withstand voltage test is carried out, a stop button is pressed to stop the test after a preset test time fixed value, and a control circuit module outputs a test result at the moment;
when the insulation resistance test is carried out, a stop button is pressed to stop the test after a preset test time fixed value, and the control circuit module outputs the test result at the moment;
and determining whether the test passes or not according to the test results corresponding to different tests.
In summary, the invention provides a 10kV capacitor integration test device and a test method thereof, which adopt a control circuit module, an alternating current low voltage module, an alternating current high voltage module, a direct current high voltage module and corresponding switches to respectively realize a capacitance test, an alternating current withstand voltage test and an insulation resistance test of a capacitor, and through an integrated design, the number of instruments required by the test is reduced, the operation is convenient, and the universality is strong. And through setting up wiring control module, can realize automatic wiring, reduced operating personnel's manual wiring number of times, improved work efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic diagram of a principle of a 10kV capacitor integration test device provided by an embodiment of the present invention.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present embodiment provides an integrated testing apparatus for a 10kV capacitor, including:
the device comprises a control circuit module, an alternating current low-voltage module, an alternating current high-voltage module, a direct current high-voltage module, a wiring control module, a first output wiring and a second output wiring of the wiring control module, a power switch, a measurement switch and a stop switch;
the control circuit module is used for outputting corresponding control signals according to the capacitance test, the alternating current withstand voltage test and the insulation resistance test, and outputting corresponding test results after acquiring and processing corresponding voltage values and current values;
when the capacitance test is carried out, the control signal is used for controlling the alternating current low-voltage module to output a first test signal, and controlling a first output connection wire and a second output connection wire of the connection wire control module to be respectively connected with two output ends of the alternating current low-voltage module, and the first test signal is used for carrying out the capacitance test;
when the alternating-current voltage withstand test is carried out, the control signal is used for controlling the alternating-current high-voltage module to output a second test signal, the first output connection wire and the second output connection wire of the wiring control module are connected with one output end of the alternating-current high-voltage module after being in short circuit, the other output end of the alternating-current high-voltage module is grounded, and the second test signal is used for carrying out the alternating-current voltage withstand test;
when the insulation resistance test is carried out, the control signal is used for controlling the direct-current high-voltage module to output a third test signal, the first output connection wire and the second output connection wire of the wiring control module are connected with the output negative polarity end of the direct-current high-voltage module after being in short circuit, the output positive polarity end of the direct-current high-voltage module is grounded, and the third test signal is used for carrying out the insulation resistance test;
the power switch is used for controlling the on-off of the power supply, and the measuring switch and the stop switch are respectively used for controlling the start and stop of each test.
It should be noted that, in this embodiment, a power supply module is further provided, and the power supply module is configured to obtain 220V alternating-current voltage (i.e., alternating-current voltage for power supply) from a test site maintenance power supply, so as to respectively supply power to the human-computer interaction module, the control circuit module, the alternating-current low-voltage module, the alternating-current high-voltage module, and the direct-current high-voltage module.
The power module mainly comprises components such as a protective tube, an instrument power switch, a filter, an overcurrent protection device and the like, and the specific setting can be determined according to requirements.
The alternating current low-voltage module is used for converting alternating current voltage for power supply into preset low-voltage alternating current voltage and outputting the preset low-voltage alternating current voltage as a first test signal. Namely, the 220V ac voltage is changed to 20V ac voltage (i.e., the preset low voltage ac voltage) by the transformer and outputted.
The alternating current high-voltage module is used for converting alternating current voltage for power supply into preset high-voltage alternating current voltage and outputting the preset high-voltage alternating current voltage as a second test signal. The alternating-current high-voltage module is internally provided with an autotransformer, the alternating-current high-voltage module converts alternating voltage for power supply in a high-voltage alternating-current voltage range through the autotransformer, and the high-voltage alternating-current voltage range is determined by inherent parameters of the autotransformer. The output voltage can be adjusted to 0-50kV, for example, by an autotransformer.
The direct-current high-voltage module is used for converting alternating-current voltage for power supply into preset high-voltage direct-current voltage and outputting the preset high-voltage direct-current voltage as a third test signal. The direct-current high-voltage module is internally provided with a diode circuit, a filter capacitor and a voltage stabilizer, the direct-current high-voltage module converts alternating-current voltage for power supply into any one of a plurality of preset high-voltage direct-current voltages through the diode circuit, the filter capacitor and the voltage stabilizer, and the plurality of preset high-voltage direct-current voltages are determined by the diode circuit, the filter capacitor and the voltage stabilizer. For example, 1000V, 2500V and 5000V DC voltage can be output.
In this embodiment, a human-computer interaction module may be further provided, including a printer, a display, a key and other components, to feed test data back to the tester in real time and transmit control information to the K1.
The man-machine interaction module is used for selecting the capacitance test, the alternating current withstand voltage test and the insulation resistance test, outputting corresponding control signals to the control circuit module and displaying corresponding test results.
The man-machine interaction module is provided with an intelligent mode, and the intelligent mode is used for controlling the control circuit module to sequentially perform a capacitance test, an insulation resistance test and an alternating current withstand voltage test.
This embodiment provides a 10kV condenser integration test device, adopts control circuit module, exchanges low pressure module, exchanges high pressure module, direct current high pressure module and the switch that corresponds, realizes the capacitance test of condenser, exchanges withstand voltage test and insulation resistance test respectively, through the design that integrates for experimental required instrument quantity reduces, convenient operation, commonality are strong. And through setting up wiring control module, can realize automatic wiring, reduced operating personnel's manual wiring number of times, improved work efficiency.
And the human-computer interaction module is also arranged, so that the test can be conveniently controlled by an operator, the operation process is simplified, and the operator can conveniently know the test process.
The above is a detailed description of an embodiment of the 10kV capacitor integration test device provided by the invention, and the following is a detailed description of an embodiment of the 10kV capacitor integration test method provided by the invention.
The embodiment provides a 10kV capacitor integration test method, which is applied to a 10kV capacitor integration test device as in the previous embodiment, and is used for grounding the integration test device, connecting a first output connection and a second output connection of a connection control module to two poles of a capacitor to be tested, and grounding a housing of the capacitor to be tested, and the method comprises the following steps:
switching on a power switch so as to obtain alternating current voltage for power supply;
starting a test by selecting one of a capacitance test, an alternating-current withstand voltage test and an insulation resistance test and pressing a measurement switch;
when the capacitance test is carried out, if the capacitance value of the capacitor to be tested obtained according to the test result output by the control circuit module does not change, the stop button is pressed to stop the test, and the control circuit module outputs the test result at the moment;
when an alternating current withstand voltage test is carried out, a stop button is pressed to stop the test after a preset test time fixed value, and a control circuit module outputs a test result at the moment;
when the insulation resistance test is carried out, a stop button is pressed to stop the test after a preset test time fixed value, and the control circuit module outputs the test result at the moment;
and determining whether the test passes or not according to the test results corresponding to different tests.
The experimental procedures and principles of the different tests of the experimental method are described in detail below with reference to fig. 1.
1) Capacitance test
Before the test begins, the operator reliably grounds the instrument and connects output lines X1, X2 to the capacitor poles, and the capacitor case is grounded. The 220V alternating voltage with the frequency of 50HZ is input into D1, an instrument power switch of D2 is switched on, the 220V alternating voltage is connected with K1 and R1, an operator selects a 'capacitance measurement' mode, then K1 sends out a control signal and switches on an alternating current low-voltage module J1, J1 converts the 220V alternating voltage into 20V alternating voltage through a transformer and outputs the 20V alternating voltage, when a 'measurement' key is pressed, K1 sends out a signal to control K2 to connect two output test lines X1 and X2 with two output ends of J1, the 20V alternating voltage is output to two electrodes of a capacitor through X1 and X2, an ammeter connected to an output end of J1 in series can measure a current value I in real time and feed back the current value I to K1, and the formula for K1 is as follows: c = I/(2 pi fU) calculates C value (wherein pi is 3.14159, frequency f is 50HZ, voltage U is 20V, namely C = I/6283.18), and feeds back the C value to R1, when data is stabilized, data is recorded or printed, a 'stop' key is pressed, K1 is disconnected from J1, the AC voltage output by J1 is reduced to 0V, and simultaneously, control signals are sent out to disconnect the output ends of X1, X2 and J1, so that the capacitor is fully discharged, and the test is finished.
2) AC withstand voltage test
Before the test begins, the operator reliably grounds the instrument and connects output lines X1, X2 to the capacitor poles, and the capacitor case is grounded. The 220V alternating voltage with the frequency of 50HZ is input into D1, an instrument power switch of D2 is switched on, the 220V alternating voltage is connected to K1, an operator selects an 'alternating voltage withstand' mode, the K1 sends out a control signal and switches on an alternating voltage module J2, J2 comprises an autotransformer, the output voltage can be smoothly adjusted from 0kV to 50kV, a voltmeter is arranged on the voltage output side, and the output voltage can be measured in real time and fed back to K1 and R1. And when the adjusting knob is confirmed to be in a zero position, a 'measurement' key is pressed, the K1 sends a signal to control the K2 to connect the output end of the J2 after the two output test lines X1 and X2 are short-circuited, and the output of the other end of the J2 is fixedly grounded through an instrument. According to the requirement of test regulations, the pre-test alternating-current withstand voltage value of a 10kV capacitor is 0.8 times of the factory withstand voltage test voltage 40kV, namely 31.5kV, the withstand voltage time is 60s, an adjusting knob is rotated to adjust the output voltage to 31.5kV, a timing button is pressed, the adjusting knob is reset to zero after 60s, a 'stop' key is pressed, a control signal is sent out by K1 to disconnect the J2, the open circuit state of X1 and X2 is restored, the connection with J2 is disconnected, the capacitor is fully discharged, and the test is finished.
3) Insulation resistance test
Before the test begins, the operator reliably grounds the instrument and connects output lines X1, X2 to the capacitor poles, and the capacitor case is grounded. The 220V alternating voltage with the frequency of 50HZ is input into D1, an instrument power switch of D2 is switched on, the 220V alternating voltage is connected to K1, an operator selects an 'insulation resistance measurement' mode, then K1 sends out a control signal and is connected with a direct current high-voltage module Z1, and Z1 outputs stable selectable 500V, 1000V, 2500V and 5000V direct current voltages through a rectifier diode circuit, a filter capacitor, a voltage stabilizer and other components. Selecting 2500V DC voltage and pressing down a 'measurement' key, sending a signal by K1 to control K2 to short circuit two output test lines X1 and X2 and connect with an output negative polarity end of Z1, fixedly grounding the positive polarity end through an instrument, adding 2500V DC voltage to a capacitor, feeding a current value I back to K1 by an ammeter in Z1 in real time, and using a formula by K1: r = U/I calculates the R value, K1 feeds back the R value to R1, data is recorded after 60s, a 'stop' key is pressed, K1 sends out a control signal to disconnect Z1, meanwhile, the open circuit state of X1 and X2 is restored, the connection with Z1 is disconnected, the capacitor is fully discharged, and the test is finished.
4) Intelligent mode
Before the test begins, the operator reliably grounds the instrument and connects output lines X1, X2 to the capacitor poles, and the capacitor case is grounded.
a. Inputting 220V alternating voltage with the frequency of 50HZ into D1, closing an instrument power switch of D2, connecting the 220V alternating voltage into K1, selecting an 'intelligent mode', enabling K1 to firstly enter a 'capacitance measurement' mode, enabling K1 to send a control signal and switch on an alternating low-voltage module J1, enabling J1 to convert the 220V alternating voltage into 20V alternating voltage through a transformer and outputting the 20V alternating voltage, enabling K1 to continuously send a signal to control K2 to connect two output test lines X1 and X2 with two output ends of J1, enabling the 20V alternating voltage to be output to two electrodes of a capacitor through X1 and X2, enabling an ammeter connected with an output end of J1 in series to measure a current value I in real time, and feeding the current value I back to K1, and enabling K1 to use a formula: c = I/(2 pi fU) calculates C value (where pi is 3.14159, frequency f is 50HZ, voltage U is 20V, i.e., C = I/6283.18), and feeds back C value to R1, and when data is stable and has no change within 5s, the data is automatically saved and printed. Finally, K1 is disconnected from J1, the voltage of the alternating current output by J1 is reduced to 0V, and control signals are sent out to disconnect the output ends of X1, X2 and J1. At which point K1 automatically enters the next measurement mode.
And b, continuously switching the K1 into an alternating current withstand voltage mode, sending a control signal by the K1, switching on an alternating current high-voltage module J2, presetting a fixed output voltage tap in the J2, wherein the constant output is 31.5kV, and sending a signal by the K1 to control the J2 to fixedly output 31.5kV after entering the intelligent mode at the moment. And then K1 controls K2 to short circuit the two output test lines X1 and X2 and then connect the two output test lines with one end output of J2, and one end output of J2 is fixedly grounded through the instrument. The withstand voltage time is 60s, the timing device starts timing, after 60s, K1 is disconnected from J2, the open circuit state of X1 and X2 is restored, the connection with J2 is disconnected, K1 feeds back the test passing to R1, and the test data is stored and printed. If the 31.5kV alternating voltage is unstable (exceeds the range of +/-630V) in the test process, the K1 is disconnected from the J2, and the K1 feeds back the test abnormality to the R1.
And c, continuously switching the K1 into an insulation resistance measurement mode, sending a control signal by K1, connecting a direct-current high-voltage module Z1, automatically selecting 2500V direct-current voltage, sending a signal by K1 to control K2 to short-circuit two output test lines X1 and X2 and connect the output negative polarity end of Z1, fixedly grounding the positive polarity end through an instrument, adding the 2500V direct-current voltage to a capacitor, feeding a current value I back to K1 by an ammeter in Z1 in real time, and using a formula by K1: and calculating an R value by R = U/I, feeding back the R value to R1 by K1, automatically storing and printing data after 60s, sending a control signal by K1 to disconnect Z1, simultaneously restoring the open circuit state of X1 and X2, disconnecting the open circuit state of X1 and Z1, fully discharging the capacitor, and finishing the test.
According to the method, the integrated test device is utilized, the corresponding test process can be controlled through the corresponding buttons, test equipment required by operators is reduced, the test process is simplified, and the problem of low efficiency caused by repeated wiring is avoided.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a 10kV condenser integration test device which characterized in that includes:
the device comprises a control circuit module, an alternating current low-voltage module, an alternating current high-voltage module, a direct current high-voltage module, a wiring control module, a first output wiring and a second output wiring of the wiring control module, a power switch, a measurement switch and a stop switch;
the control circuit module is used for outputting corresponding control signals according to a capacitance test, an alternating current withstand voltage test and an insulation resistance test, and outputting corresponding test results after acquiring and processing corresponding voltage values and current values;
when the capacitance test is carried out, the control signal is used for controlling the alternating current low-voltage module to output a first test signal, and controlling a first output connection wire and a second output connection wire of the connection wire control module to be respectively connected with two output ends of the alternating current low-voltage module, and the first test signal is used for carrying out the capacitance test;
when the alternating current withstand voltage test is carried out, the control signal is used for controlling the alternating current high-voltage module to output a second test signal, and controlling a first output connection wire and a second output connection wire of the wiring control module to be connected with one output end of the alternating current high-voltage module after being in short circuit, the other output end of the alternating current high-voltage module is grounded, and the second test signal is used for carrying out the alternating current withstand voltage test;
when the insulation resistance test is carried out, the control signal is used for controlling the direct current high-voltage module to output a third test signal, and controlling the first output connection wire and the second output connection wire of the wiring control module to be connected with the output negative polarity end of the direct current high-voltage module after being in short circuit, the output positive polarity end of the direct current high-voltage module is grounded, and the third test signal is used for carrying out the insulation resistance test;
the power switch is used for controlling the on-off of the power supply, and the measuring switch and the stop switch are respectively used for controlling the start and stop of each test.
2. The integrated testing device for the 10kV capacitor as claimed in claim 1, further comprising a human-computer interaction module, wherein the human-computer interaction module is used for selecting a capacitance test, an alternating current withstand voltage test and an insulation resistance test, outputting corresponding control signals to the control circuit module and displaying corresponding test results.
3. The 10kV capacitor integrated test device according to claim 2, wherein the human-computer interaction module is provided with an intelligent mode, and the intelligent mode is used for controlling the control circuit module to sequentially perform the capacitance test, the insulation resistance test and the alternating-current withstand voltage test.
4. The integrated 10kV capacitor testing device according to claim 2, further comprising a power supply module, wherein the power supply module is used for obtaining an alternating-current voltage for power supply so as to respectively supply power to the human-computer interaction module, the control circuit module, the alternating-current low-voltage module, the alternating-current high-voltage module and the direct-current high-voltage module.
5. The integrated testing device for the 10kV capacitor as claimed in claim 4, wherein the AC low-voltage module is configured to convert the AC voltage for power supply into a preset low-voltage AC voltage, and output the preset low-voltage AC voltage as the first test signal.
6. The integrated testing device for the 10kV capacitor as claimed in claim 4, wherein the AC high-voltage module is configured to convert the AC voltage for power supply into a preset high-voltage AC voltage, and output the preset high-voltage AC voltage as the second test signal.
7. The integrated testing device for the 10kV capacitor as claimed in claim 6, wherein an autotransformer is arranged in the AC high voltage module, the AC high voltage module converts the AC voltage for power supply through the autotransformer in a high AC voltage range, and the high AC voltage range is determined by intrinsic parameters of the autotransformer.
8. The integrated 10kV capacitor testing device according to claim 4, wherein the DC high voltage module is configured to convert the AC voltage for power supply into a preset high-voltage DC voltage, and output the preset high-voltage DC voltage as the third test signal.
9. The integrated testing device of claim 8, wherein a diode circuit, a filter capacitor and a voltage stabilizer are arranged in the DC high voltage module, the DC high voltage module converts the AC voltage for power supply into any one of a plurality of preset high voltage DC voltages through the diode circuit, the filter capacitor and the voltage stabilizer, and the preset high voltage DC voltages are determined by the diode circuit, the filter capacitor and the voltage stabilizer.
10. A 10kV capacitor integration test method applied to a 10kV capacitor integration test device according to any one of claims 1 to 9, wherein the integration test device is grounded, the first output connection and the second output connection of the connection control module are connected to two poles of a capacitor to be tested, and the housing of the capacitor to be tested is grounded, comprising the steps of:
switching on the power switch so as to obtain alternating current voltage for power supply;
starting a test by selecting any one of the capacitance test, the alternating-current withstand voltage test and the insulation resistance test and pressing a measurement switch;
when the capacitance test is carried out, if the capacitance value of the capacitor to be tested obtained according to the test result output by the control circuit module does not change, a stop button is pressed to stop the test, and the control circuit module outputs the test result at the moment;
when the alternating current withstand voltage test is carried out, the stop button is pressed to stop the test after a preset test time fixed value, and the control circuit module outputs the test result at the moment;
when the insulation resistance test is carried out, the stop button is pressed to stop the test after a preset test time fixed value, and the control circuit module outputs the test result at the moment;
and determining whether the test passes or not according to the test results corresponding to different tests.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111139435.0A CN113567799A (en) | 2021-09-28 | 2021-09-28 | 10kV capacitor integrated test device and test method thereof |
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Application publication date: 20211029 |