CN113341245B - Remote control arc suppression coil test system and test method - Google Patents
Remote control arc suppression coil test system and test method Download PDFInfo
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- CN113341245B CN113341245B CN202110569694.0A CN202110569694A CN113341245B CN 113341245 B CN113341245 B CN 113341245B CN 202110569694 A CN202110569694 A CN 202110569694A CN 113341245 B CN113341245 B CN 113341245B
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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
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
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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
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
Abstract
The invention discloses a remote control arc suppression coil testing system and a testing method, in the system, a capacitance control board is connected with a programmable power supply through a voltage output relay and outputs voltage to an arc suppression coil to be tested, a measurement and control mainboard is connected with the programmable power supply to read voltage output data and current output data of the programmable power supply and control the start-up and shutdown of the programmable power supply, a handheld terminal is wirelessly connected with the measurement and control mainboard, a comparison unit is connected with a wireless communication module, when the voltage value fed back by the arc suppression coil to be tested deviates from the voltage output data and exceeds a first preset threshold value, the current value fed back by the arc suppression coil to be tested deviates from the current output data and exceeds a second preset threshold value, and/or the capacitance value fed back by the arc suppression coil to be tested deviates from the capacitance value and exceeds a third preset threshold value.
Description
Technical Field
The invention belongs to the technical field of arc suppression coils, and particularly relates to a remote control arc suppression coil testing system and a remote control arc suppression coil testing method.
Background
With the rapid increase of economy and steady increase of power consumption in China, the arc suppression coil controller complete device is continuously put into the whole power grid system to operate, the operating state of the arc suppression coil controller complete device possibly has deviation after a long time, and the whole power system cannot be correctly compensated, so that the fault range is expanded. However, the device itself lacks an intuitive test means for a third party except for an operation indication signal provided by a manufacturer. In particular, the arc extinction device has various fault types due to various types of adjustment modes and various manufacturers. The existing inspection and test work of the arc suppression coil controller needs to test the power-on point and the test observation point to work simultaneously, and objects are isolated between the two working points or are far away from each other, and the traditional debugging work can use communication tools such as interphones generally, and the work is accomplished by the cooperation of two people. One group is provided with a test power supply at a neutral point or a mutual inductor (secondary side) of outdoor equipment, and the other group is provided with an indoor controller screen for observing the corresponding action of the arc suppression coil, thereby estimating whether the function of the arc suppression coil is good or not. The addition of the outdoor test power supply is artificially controlled, the phenomena of irregular contact and disconnection time, asynchronous outdoor test operation and indoor test observation and the like often occur, so that the test result is unclear and repeated tests are needed, the test work is passive and low in efficiency, corresponding instruments and means are lacked when the defects of the secondary part of the equipment are specifically positioned, repeated work is sometimes caused due to the reasons, even a test conclusion error occurs, and hidden dangers are buried in the safe operation of the equipment. In order to improve the operation reliability and the maintenance efficiency of the arc extinction device, a comprehensive detection means is required to be adopted, and the arc extinction system is tested and faults are accurately checked.
The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a remote control arc suppression coil testing system and a remote control arc suppression coil testing method. The intelligent evaluation device overcomes the defects of poor detection precision, complex test and unfriendly man-machine operation of the existing arc suppression coil, realizes intelligent evaluation of the arc suppression coil device, and has the advantages of high detection precision, strong anti-interference capability and easy popularization and application.
The invention aims to realize the technical proposal that a remote control arc suppression coil testing system comprises,
the programmable power supply generates an adjustable alternating current power supply, and the current output relay is connected with the programmable power supply to output current to the arc suppression coil to be detected;
a capacitance control board connected with the programmable power supply via a voltage output relay to output voltage to the arc suppression coil to be measured, the capacitance control board comprises,
a first power management module providing a first predetermined voltage,
a first master MCU connected to the first power management module to operate based on a first predetermined voltage,
a capacitance switching module connected with the first main control MCU for switching or switching predetermined capacitance, the capacitance switching module comprises a multi-path capacitance group composed of a relay and a thin film capacitor,
the capacitance measuring module is arranged between the first main control MCU and the capacitance switching module to measure the capacitance value switched by the capacitance switching module, and the first main control MCU calibrates the capacitance switching module to be switched or switched based on the capacitance value until the capacitance value is the preset capacitance;
the measurement and control main board is connected with the programmable power supply to read voltage output data and current output data of the programmable power supply and control the startup and shutdown of the programmable power supply;
the handheld terminal is wirelessly connected with the measurement and control main board and comprises a wireless communication module,
a wireless communication module which is wirelessly connected with the measurement and control main board and a control screen of the arc suppression coil to be measured,
a key input module configured to input an instruction, the instruction being transmitted to the measurement and control motherboard via the wireless communication module,
the comparison unit is connected with the wireless communication module, and when the voltage value fed back by the arc suppression coil to be detected deviates from the voltage output data and exceeds a first preset threshold value, the current value fed back by the arc suppression coil to be detected deviates from the current output data and exceeds a second preset threshold value, and/or the capacitance value fed back by the arc suppression coil to be detected deviates from the capacitance value and exceeds a third preset threshold value, the comparison unit sends out a fault signal,
and the display module is connected with the wireless communication module and the comparison unit to display information, wherein the information at least comprises fault signals and/or voltage output data, current output data and the capacitance value.
In the remote control arc suppression coil test system, the measurement and control mainboard comprises,
a second communication module which is connected with the programmable power supply and the capacitance control panel to communicate and interact with the measurement and control main board,
a second power management module that provides a second predetermined voltage,
the second main control MCU is connected with the second communication module and the second power management module, the second main control MCU operates based on a second preset voltage, responds to an instruction, generates a first signal and sends the first main control MCU, the first main control MCU controls the capacitor switching module to switch in or switch off a preset capacitor based on the first signal and outputs the capacitance value,
one end of the control output module is connected with the second main control MCU, the other end of the control output module is connected with the current output relay and the voltage output relay, and the control output module responds to a second signal of the second main control MCU and respectively controls the on-off of the current output relay and the voltage output relay;
in the remote control arc suppression coil testing system, the wireless communication module is lora communication equipment.
In the remote control arc suppression coil test system, the program-controlled power supply comprises an AC/DC unit for rectifying alternating current into direct current, an isolation DC/DC unit and a DC/AC inversion unit for converting the direct current into the alternating current.
In the remote control arc suppression coil testing system, the measurement and control main board is connected with and controls the programmable power supply and the capacitance control board through an RS485 bus.
In the remote control arc suppression coil test system, the capacitance control board is integrated with an alternating current bridge.
In the remote control arc suppression coil test system, the first main control MCU or the second main control MCU comprises an embedded processor.
In the remote control arc suppression coil test system, the first preset voltage or the first preset voltage is 5V or 3.3V respectively.
In the remote control arc suppression coil test system, the display module is a touch screen.
In the remote control arc suppression coil test system, the relay is a solid state relay.
According to another aspect of the invention, a testing method using the remotely controlled arc suppression coil testing system comprises the following steps,
the arc suppression coil is provided with an arc suppression coil control screen, the arc suppression coil is sequentially connected with a first current transformer and a second current transformer in series, one end of the second current transformer is a grounding end, one end of the arc suppression coil, which is far away from the first current transformer, and a test access point of the arc suppression coil is arranged between the second current transformer and the grounding end,
the handheld terminal sends an instruction, the control output module controls the voltage output relay to be communicated, the programmable power supply outputs voltage to the arc suppression coil to be detected through the voltage output relay and the capacitance control plate in sequence, the voltage value fed back by the arc suppression coil to be detected and displayed by the arc suppression coil control screen deviates from the voltage output data and exceeds a first preset threshold, and the second main control MCU sends a fault signal;
the handheld terminal sends an instruction, the control output module controls the voltage output relay to be communicated, the programmable power supply outputs current output data to the arc suppression coil to be detected through the current of the current output relay, the current value fed back by the arc suppression coil to be detected and displayed by the arc suppression coil control screen deviates from the current output data and exceeds a second preset threshold, and the second main control MCU sends a fault signal;
the handheld terminal sends an instruction, in response to the instruction, a second main control MCU generates a first signal and sends the first main control MCU, the first main control MCU controls a capacitor switching module to switch in or cut off a preset capacitor based on the first signal, the first main control MCU calibrates the capacitor switching module based on the capacitance value until the capacitance value is the preset capacitor, the capacitance value fed back by the arc suppression coil to be detected and displayed by the arc suppression coil control screen deviates from the capacitance value and exceeds a third preset threshold value, and the second main control MCU sends a fault signal.
Compared with the prior art, the invention has the following advantages:
the invention can detect the capacitance current test accuracy of the control device of the arc suppression coil and the voltage/current measurement accuracy of the control device; after the system ground fault is detected, the arc extinction device body and the control device do not act correctly; the invention simulates the capacitance current of the power system, overcomes the defect of difficult field debugging of the arc suppression coil, protects the normal operation of the power grid, and is convenient for the maintenance of the power department and the field debugging of the working personnel. Therefore, the invention has small volume, light weight, easy carrying and convenient operation, can be used for various works such as debugging, communication, overhauling and the like, only needs the 220V alternating current, greatly reduces the overhauling and debugging working flow and time, is economic and reliable, and has great popularization value.
Drawings
Various other advantages and benefits of the present invention will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. Also, like parts are designated by like reference numerals throughout the drawings.
In the drawings:
FIG. 1 is a schematic diagram of the test connection of the remotely controlled crowbar coil test system of the present invention;
FIG. 2 is a schematic diagram of the remotely controlled crowbar coil test system of the present invention;
FIG. 3 is a schematic structural diagram of a measurement and control main board of the remote control arc suppression coil testing system of the invention;
fig. 4 is a schematic structural diagram of a capacitive control board of the remotely controlled arc suppression coil testing system of the present invention.
The invention is further explained below with reference to the figures and examples.
Detailed Description
Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings fig. 1 to 4. While specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
It should be noted that certain terms are used throughout the description and claims to refer to particular components. As one skilled in the art will appreciate, various names may be used to refer to a component. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The description which follows is a preferred embodiment of the invention, but is made for the purpose of illustrating the general principles of the invention and not for the purpose of limiting the scope of the invention. The scope of the present invention is defined by the appended claims.
For the purpose of facilitating understanding of the embodiments of the present invention, the following description will be made by taking specific embodiments as examples with reference to the accompanying drawings, and the drawings are not to be construed as limiting the embodiments of the present invention.
For a better understanding, as shown in fig. 1 to 4, a remote controlled arc suppression coil testing system includes,
the programmable power supply 4 generates an adjustable alternating current power supply, and the current output relay 3 is connected with the programmable power supply 4 to output current to the arc suppression coil 23 to be detected;
a capacitance control board 5 connected with the programmable power supply 4 via a voltage output relay 2 to output voltage to the arc suppression coil 23 to be measured, the capacitance control board 5 comprises,
a first power management module 6, which provides a first predetermined voltage,
a first master MCU7 connected to the first power management module 6 to operate based on a first predetermined voltage,
a capacitor switching module 8 connected with the first main control MCU7 for switching predetermined capacitors, wherein the capacitor switching module 8 comprises a multi-channel capacitor group consisting of a relay and a thin film capacitor,
a capacitance measuring module 14, which is disposed between the first main control MCU7 and the capacitance switching module 8 to measure a capacitance value switched by the capacitance switching module 8, wherein the first main control MCU7 calibrates the capacitance switching module 8 to switch or switch until the capacitance value is the predetermined capacitance based on the capacitance value;
a measurement and control main board 1 connected with the programmable power supply 4 for reading the voltage output data and the current output data of the programmable power supply 4 and controlling the start-up and the stop of the programmable power supply 4, wherein the measurement and control main board 1 comprises,
a second communication module 9 connected with the programmable power supply 4 and the capacitance control board 5 for communication interaction with the measurement and control main board 1,
a second power management module 10, which provides a second predetermined voltage,
a second main control MCU12 connected to the second communication module 9 and the second power management module, wherein the second main control MCU12 operates based on a second predetermined voltage, responds to a command, the second main control MCU12 generates a first signal to transmit to the first main control MCU7, the first main control MCU7 controls the capacitor switching module 8 to switch in or switch off a predetermined capacitor based on the first signal and outputs the capacitor value,
one end of the control output module 15 is connected with the second main control MCU12, the other end of the control output module is connected with the current output relay 3 and the voltage output relay 2, and the control output module 15 responds to a second signal of the second main control MCU12 to respectively control the on-off of the current output relay 3 and the voltage output relay 2;
the handheld terminal 16 is wirelessly connected with the measurement and control main board 1 and comprises,
a wireless communication module 17 which is connected with the measurement and control main board 1 and a control screen 20 of the arc suppression coil to be measured in a wireless way,
a key input module 11 configured to input a command, the command being sent to the measurement and control main board 1 via the wireless communication module 17,
the comparison unit is connected with the wireless communication module, and when the voltage value fed back by the arc suppression coil to be detected deviates from the voltage output data and exceeds a first preset threshold value, the current value fed back by the arc suppression coil to be detected deviates from the current output data and exceeds a second preset threshold value, and/or the capacitance value fed back by the arc suppression coil to be detected deviates from the capacitance value and exceeds a third preset threshold value, the comparison unit sends out a fault signal,
and the display module 13 is connected with the wireless communication module 17 and the comparison unit to display information, wherein the information at least comprises a fault signal and/or voltage output data, current output data and the capacitance value.
In a preferred embodiment of the remote control arc suppression coil testing system, the wireless communication module 17 is a lora communication device.
In the preferred embodiment of the remote control arc suppression coil testing system, the programmable power supply 4 comprises an AC/DC unit for rectifying AC into DC, an isolation DC/DC unit, and a DC/AC inverter unit for converting DC into AC.
In the preferred embodiment of the remote control arc suppression coil testing system, the measurement and control main board 1 is connected with and controls the programmable power supply 4 and the capacitance control board 5 through an RS485 bus.
In the preferred embodiment of the remote control arc suppression coil testing system, the capacitance control board 5 is integrated with an alternating current bridge.
In the preferred embodiment of the remotely controlled arc suppression coil testing system, the first master control MCU7 or the second master control MCU12 includes an embedded processor.
In a preferred embodiment of the remotely controlled arc suppression coil testing system, the first predetermined voltage or the first predetermined voltage is 5V or 3.3V, respectively.
In the preferred embodiment of the remote control arc suppression coil testing system, the display module 13 is a touch screen.
In a preferred embodiment of the remote-control arc suppression coil testing system, the relay is a solid-state relay.
The invention adopts the wireless control technology with the oscillography function, not only can carry out black box test on the arc extinguishing coil, but also can observe the electric signals of the secondary part of the analysis equipment through the oscillography function during the test, thereby accurately positioning the defect part of the equipment and providing means and tools for quickly eliminating the defect. The problem of debug the inconvenient tester of instrument and use among the prior art is solved, need two sets of personnel cooperations in the save test procedure, reduce the potential safety hazard, make things convenient for the field test.
In one embodiment, the measurement and control main board 1 controls the programmable power supply 4 through an RS485 bus. The programmable power supply 4 can output voltage or current according to a command sent by the measurement and control main board 1. The programmable power supply 4 is composed of an AC/DC unit, an isolation DC/DC unit and a DC/AC inversion unit. The main function is that 220V/50Hz commercial power is rectified into high-voltage direct current through the AC/DC unit, and then is inverted into a high-precision adjustable alternating current power supply through the DC/AC unit, so that high-precision alternating current voltage source and current source excitation are provided for detection equipment, and the high-precision adjustable alternating current power supply is a key component in the detection equipment. The measurement and control main board 1 controls the capacitor control board 5 to input and cut off the capacitor through an RS485 bus. The switching capacitance switch adopts an industrial power relay, and the switched capacitance value is connected to the main control unit CPU through a switching value signal. An alternating current bridge is integrated on the upper side of the capacitor control panel 5, and the capacitance value of the capacitor is calculated by isolating operational amplifier sampling capacitor voltage and current.
In one embodiment, the measurement and control motherboard 1 includes a second main control MCU12, a display module 13, a key and encoder module, a second power management module 10, a second communication module 9, a storage module, and a serial interface module. The second master MCU12 uses CORTEX A8 as core AM3358 chip as embedded processor. The chip has higher processing speed and can run at the clock of 800MHZ at most. And AM3358 has 3 low-power consumption control modes, and integrates more peripheral interfaces on the chip, and the main control chip runs linux3.2.10 as an integral basic system. The display module 13 selects a 7-inch 800 × 480 TFT color display as the human-computer interface. The storage module adopts SD, adopts industrial grade NAND FLASH (512MByte/1GByte) as the environment for operating embedded software in the instrument, and utilizes a file system for storing parameters and test data. The second power management module 10 converts the input 12V power into a 5V power and a 3.3V power for the motherboard chip to work, the USB module adopts an OTP mode and can be used as a USB disk for data storage and online use, and the second communication module 9 adopts an RS485 communication bus for communicating with the external programmable power supply 4 and the capacitor control board 5. The control output module 15 controls the operation of the voltage-current relay. The optical coupling input module is used as a trigger signal of the external control equipment. The optical Lora/WIFI wireless communication module 17 is a module using an SDIO interface and used as a wireless connector, and the WIFI module uses a WIFI module using an SDIO interface. And the reserved upper computer control module reserves 1 path of Ethernet interface for remote operation.
In one embodiment, the LCD screen is a 7.0 inch true color resistive touch screen.
In one embodiment, the test apparatus further comprises an operational amplifier filter module, which employs an isolated operational amplifier chip AMC1200 having an isolation voltage of 4 KV.
In one embodiment, the testing device further comprises a data acquisition module, and the AD706 is used as an analog-digital conversion chip.
In one embodiment, the memory module comprises a TF card memory module, and an environment which adopts industrial-grade NAND FLASH (512MByte/1GByte) as embedded software running inside the instrument is adopted.
In one embodiment, the second communication module 9 includes 2 RS485 interfaces and one ethernet interface.
In one embodiment, the capacitive control board 5 board includes a first master MCU7, a first power management module 6, a communication module, a first capacitance measurement module 14, and a capacitance switching conversion module. The first master MCU7 has an STM32F072C8T6 chip as an embedded processor. The first power management module 6 converts the input 12V power into a 5V power and a 3.3V power for the motherboard chip to work. The communication module adopts an RS485 communication bus for communicating with an external measurement and control main board 1, and the capacitance switching module adopts a macro relay and a thin film capacitor to form the switching of 10 paths of capacitors. Switching of any capacitance of 1-200uf can be accomplished. The stepping is 1uF, and a discharge resistor is arranged to protect the electronic device from being damaged in the process of measuring the capacitance.
The capacitance measuring module 14 measures the capacitance value of the input capacitor by using a bridge method, and the measuring steps are as follows:
1. the signal generator generates a sinusoidal signal of frequency f,
2. the follower is used for carrying out signal amplification,
3. the measured capacitance is used to excite the CAPP,
4. the self-balancing bridge realizes the self-balancing of the RC bridge according to the virtual short and the virtual break of the operational amplifier,
5. detecting R/C high-low end voltage by the differential operational amplifier: VCAPP _ CAPN, VRESN _ CAPN,
6. ADC collects the output voltage of the differential operational amplifier regulation: the pressure of the V1/V2,
7. the controller calculates the C capacity value according to the bridge principle:
when V1 is a + jb and V2 is c + jd, this can be obtained
V1/V2＝a+jb/c+jd＝(ac+bd)/(a2+b2)+j*(bc-ad)/(a2+b2)
The real part of the impedance is the resistance and the imaginary part is the capacitive reactance, and the capacitance value at the measurement frequency f can be obtained by the formula Xc ═ 1/(2 pi fC).
In one embodiment, the measurement and control motherboard 1 reads the voltage, the current and the status bit in the programmable power supply 4 through the RS485 bus, and can control the startup and shutdown of the programmable power supply 4. And the relay is driven to control the input and the cut-off of the capacitor. An alternating current bridge is integrated on the capacitor plate, and the capacitance value of the capacitor is calculated by isolating the operational amplifier and sampling the voltage and the current of the capacitor. And the signal sampling module and the main control board read data in an SPI mode. The touch screen and the SD card have data storage and a USB interface which is directly connected with a main control chip of the main control board.
In one embodiment, the AM3358 chip, which is core CORTEX A8 in the handheld terminal, acts as an embedded processor. The chip has higher processing speed and can run at the clock of 800MHZ at most. In addition, the AM3358 has 3 low power consumption control modes, and more peripheral interfaces are integrated on a chip. The adoption of the high-performance chip is the guarantee of miniaturization, intellectualization and networking design.
In one embodiment, the simulation power supply of the arc suppression coil testing device adopts a high-precision program control power supply 4, the simulation system capacitor adopts a high-voltage broadcast capacitor, the switching capacitor switch adopts an industrial power relay, and the switched capacitance value is connected to the main control unit CPU through a switching value signal. The switched system capacitor current is calculated according to the system voltage through the capacitor calibration value and is compared with the calculation result of the control device to judge whether the system capacitor current meets the requirement. After the ARM control board is electrified, initialization and self-checking of the testing instrument are completed, and voltage or current testing is selected through the touch screen. When the voltage test is selected, the voltage amplitude, the phase, the frequency, the stepping value, the switching capacitance value and the like can be set; when the current test is selected, the voltage amplitude, phase, frequency, step value, etc. can be set.
A testing method using the remotely controlled arc suppression coil testing system comprises the following steps,
the arc suppression coil 23 is provided with an arc suppression coil control screen 20, the arc suppression coil is sequentially connected with a first current transformer 21 and a second current transformer 22 in series, one end of the second current transformer 22 is a grounding end, one end of the arc suppression coil far away from the first current transformer 21 and a test access point of the arc suppression coil are arranged between the second current transformer 22 and the grounding end,
the handheld terminal 16 sends an instruction, the control output module 15 controls the voltage output relay 2 to be communicated, the program-controlled power supply 4 outputs the voltage to the arc suppression coil to be detected through the voltage output relay 2 and the capacitance control panel 5 in sequence, the voltage value fed back by the arc suppression coil to be detected, which is displayed by the arc suppression coil control screen 20, deviates from the voltage output data and exceeds a first preset threshold, and the second main control MCU12 sends a fault signal;
the handheld terminal 16 sends an instruction, the control output module 15 controls the voltage output relay 2 to be communicated, the programmable power supply 4 outputs the current output data to the arc suppression coil to be detected through the current output relay 3, the current value fed back by the arc suppression coil to be detected and displayed by the arc suppression coil control screen 20 deviates from the current output data and exceeds a second preset threshold value, and the second main control MCU12 sends a fault signal;
the handheld terminal 16 sends an instruction, in response to the instruction, the second main control MCU12 generates a first signal, and sends the first main control MCU7, the first main control MCU7 controls the capacitor switching module 8 to switch in or cut off a predetermined capacitor based on the first signal, wherein the first main control MCU7 calibrates the capacitor switching module 8 to switch in or off based on the capacitance value until the capacitance value is the predetermined capacitor, the capacitance value fed back by the arc suppression coil to be detected, which is displayed by the arc suppression coil control screen 20, deviates from the capacitance value and exceeds a third predetermined threshold, and the second main control MCU12 sends a fault signal.
Preferably, the first predetermined threshold is 2.0%, the second predetermined threshold is 2.0%, and the third predetermined threshold is 5 uF.
The detection control system can test the accuracy of the voltage, the current and the capacitance of the arc suppression coil and is simple and convenient to operate.
Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments and application fields, and the above-described embodiments are illustrative, instructive, and not restrictive. Those skilled in the art, having the benefit of this disclosure, may effect numerous modifications thereto without departing from the scope of the invention as defined by the appended claims.
Claims (10)
1. A remote control arc suppression coil test system is characterized by comprising,
the programmable power supply generates an adjustable alternating current power supply, and the current output relay is connected with the programmable power supply to output current to the arc suppression coil to be detected;
a capacitance control board connected with the programmable power supply via a voltage output relay to output voltage to the arc suppression coil to be measured, the capacitance control board comprises,
a first power management module providing a first predetermined voltage,
a first master MCU connected to the first power management module to operate based on a first predetermined voltage,
a capacitance switching module connected with the first main control MCU for switching or switching predetermined capacitance, the capacitance switching module comprises a multi-path capacitance group composed of a relay and a thin film capacitor,
the capacitance measuring module is arranged between the first main control MCU and the capacitance switching module to measure the capacitance value switched by the capacitance switching module, and the first main control MCU calibrates the capacitance switching module to be switched or switched based on the capacitance value until the capacitance value is the preset capacitance;
the measurement and control main board is connected with the programmable power supply to read voltage output data and current output data of the programmable power supply and control the startup and shutdown of the programmable power supply;
the handheld terminal is wirelessly connected with the measurement and control main board and comprises a wireless communication module,
a wireless communication module which is wirelessly connected with the measurement and control main board and the control screen of the arc suppression coil to be measured,
a key input module configured to input an instruction, the instruction being transmitted to the measurement and control motherboard via the wireless communication module,
the comparison unit is connected with the wireless communication module, and when the voltage value fed back by the arc suppression coil to be detected deviates from the voltage output data and exceeds a first preset threshold value, the current value fed back by the arc suppression coil to be detected deviates from the current output data and exceeds a second preset threshold value, and/or the capacitance value fed back by the arc suppression coil to be detected deviates from the capacitance value and exceeds a third preset threshold value, the comparison unit sends out a fault signal,
and the display module is connected with the wireless communication module and the comparison unit to display information, wherein the information at least comprises fault signals and/or voltage output data, current output data and the capacitance value.
2. The remotely controlled arc suppression coil testing system as claimed in claim 1, wherein preferably said instrumentation motherboard comprises,
a second communication module which is connected with the programmable power supply and the capacitance control board to communicate and interact with the measurement and control main board,
a second power management module that provides a second predetermined voltage,
the second main control MCU is connected with the second communication module and the second power management module, the second main control MCU operates based on a second preset voltage, responds to an instruction, generates a first signal and sends the first main control MCU, the first main control MCU controls the capacitor switching module to switch in or switch off a preset capacitor based on the first signal and outputs the capacitance value,
and one end of the control output module is connected with the second master control MCU, the other end of the control output module is connected with the current output relay and the voltage output relay, and the control output module responds to a second signal of the second master control MCU and respectively controls the on-off of the current output relay and the voltage output relay.
3. The remotely controlled arc suppression coil testing system of claim 1, wherein said wireless communication module is a lora communication device.
4. The remotely controlled arc suppression coil testing system as recited in claim 1, wherein a measurement and control motherboard connects and controls said programmable power supply and said capacitive control board through an RS485 bus.
5. The remotely controlled arc suppression coil testing system of claim 1 wherein the capacitive control board integrates an ac bridge.
6. The remotely controlled arc suppression coil testing system of claim 1, wherein the first or second master MCU comprises an embedded processor.
7. A remotely controlled arc suppression coil testing system as claimed in claim 1 wherein the first predetermined voltage or first predetermined voltage is 5V or 3.3V, respectively.
8. The remotely controlled arc suppression coil testing system of claim 1, wherein the display module is a touch screen.
9. The remotely controlled arc suppression coil testing system of claim 1, wherein said relay is a solid state relay.
10. A testing method using the remotely controlled arc suppression coil testing system of any one of claims 1-9, comprising the steps of,
the arc suppression coil is provided with an arc suppression coil control screen, the arc suppression coil is sequentially connected with a first current transformer and a second current transformer in series, one end of the second current transformer is a grounding end, one end of the arc suppression coil, which is far away from the first current transformer, and a test access point of the arc suppression coil is arranged between the second current transformer and the grounding end,
the handheld terminal sends an instruction, the control output module controls the voltage output relay to be communicated, the programmable power supply outputs voltage to the arc suppression coil to be detected through the voltage output relay and the capacitance control plate in sequence, the voltage value fed back by the arc suppression coil to be detected and displayed by the arc suppression coil control screen deviates from the voltage output data and exceeds a first preset threshold, and the second main control MCU sends a fault signal;
the handheld terminal sends an instruction, the control output module controls the voltage output relay to be communicated, the programmable power supply outputs current output data to the arc suppression coil to be detected through the current of the current output relay, the current value fed back by the arc suppression coil to be detected and displayed by the arc suppression coil control screen deviates from the current output data and exceeds a second preset threshold, and the second main control MCU sends a fault signal;
the handheld terminal sends an instruction, in response to the instruction, a second main control MCU generates a first signal and sends the first main control MCU, the first main control MCU controls a capacitor switching module to switch in or cut off a preset capacitor based on the first signal, the first main control MCU calibrates the capacitor switching module based on the capacitance value until the capacitance value is the preset capacitor, the capacitance value fed back by the arc suppression coil to be detected and displayed by the arc suppression coil control screen deviates from the capacitance value and exceeds a third preset threshold value, and the second main control MCU sends a fault signal.
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