CN104950149A - Electronic power-frequency voltage-withstand test voltage-regulating device, test wiring circuit and test voltage-regulating method - Google Patents
Electronic power-frequency voltage-withstand test voltage-regulating device, test wiring circuit and test voltage-regulating method Download PDFInfo
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Abstract
The invention discloses an electronic power-frequency voltage-withstand test voltage-regulating device, a test wiring circuit and a test voltage-regulating method, belongs to the technical field of electrical tests, and in particularly relates to an electronic power-frequency voltage-withstand test voltage-regulating device. The invention provides an electronic power-frequency voltage-withstand test voltage-regulating device which is stable in structure and reduced in output waveform distortion. The electronic power-frequency voltage-withstand test voltage-regulating device disclosed by the invention comprises a sine wave voltage-regulating module (capable of using the FZXB2000 of Shanghai Fushen Electronic Technology CO., LTD), a microcomputer control module, an operation panel, a switch power supply, a high-voltage current analogue-digital converter, a high-voltage voltage analogue-digital converter, a low-voltage current analogue-digital converter, a low-voltage voltage analogue-digital converter, a high-voltage current connecting wire, a high-voltage measuring wire and a test transformer low-voltage wire, wherein the structural essential is that the port of the microcomputer control module is connected with the port of the sine wave voltage-regulating module, the port of the operation panel, the port of the switch power supply, the port of the high-voltage current analogue-digital converter, the port of the high-voltage voltage analogue-digital converter, the port of the low-voltage current analogue-digital converter and the port of the low-voltage voltage analogue-digital converter respectively.
Description
Technical field
the invention belongs to electrical test technical field, particularly relate to a kind of electronic working frequency withstand voltage test regulator.
Background technology
according to power industry standard, the regulator that power frequency withstand test needs at least needs two pieces of voltage tables, two pieces of reometers, a pressure regulator.Equipment set heavy (being greater than 20 kilograms), field wiring is simultaneously various, affects test efficiency.Test unit in the market has heavy, integrated low, the shortcoming such as robotization is low of testing equipment respectively.
Summary of the invention
the present invention is exactly for the problems referred to above, provides a kind of Stability Analysis of Structures, electronic working frequency withstand voltage test regulator that output waveform distorts little.
for achieving the above object, the present invention adopts following technical scheme, the present invention includes Sinusoidal wave pressure regulating module (can adopt the FZXB2000 of Shanghai Fu Shen Electronic Science and Technology Co., Ltd.), microcomputer control module, guidance panel, Switching Power Supply, high-tension current analog to digital converter, high tension voltage analog to digital converter, low-tension current analog to digital converter, low voltage voltage analog to digital converter, high-tension current wiring, high-tension measurement line, testing transformer low-voltage line, its structural feature microcomputer control module port respectively with Sinusoidal wave pressure regulating module port, guidance panel port, Switching Power Supply port, high-tension current analog to digital converter port, high tension voltage analog to digital converter port, low-tension current analog to digital converter port, low voltage voltage analog to digital converter port is connected, high tension voltage analog to digital converter port is connected with high-tension current wiring, high tension voltage analog to digital converter port is connected with high-tension measurement line, Sinusoidal wave pressure regulating module port is connected with testing transformer low-voltage line, low voltage voltage analog to digital converter input port one end is connected with resistance R2 one end, the resistance R2 other end respectively with the low voltage voltage analog to digital converter input port other end, resistance R3 one end is connected, and the resistance R3 other end is connected with testing transformer low-voltage line, low-tension current analog to digital converter input end is connected with testing transformer low-voltage line by Hall element.
as a kind of preferred version, guidance panel of the present invention is provided with LCDs, high-voltage bleeder interface, testing transformer low pressure input interface, high pressure end interface, function selection area, the power switch of described Switching Power Supply, function key and numerical key panel, emergency stop push button, high-voltage bleeder interface is connected with described high-tension measurement line, testing transformer low pressure input interface is connected with described testing transformer low-voltage line, high pressure end interface is connected with described high-tension current wiring, LCDs port, function selection area port, function key is connected with microcomputer control module port respectively with numerical key panel port, emergency stop push button port is connected with Sinusoidal wave pressure regulating module control port.
in addition, microcomputer control module of the present invention comprises CPU, D/A digital to analog converter, CPU output port is connected with LCDs input port, D/A digital to analog converter input port respectively, D/A digital to analog converter output port is connected with described simple alternating current voltage regulating module input port, and CPU input port is connected with described high-tension current AfD converter output mouth, high tension voltage AfD converter output mouth, low-tension current AfD converter output mouth, low voltage voltage AfD converter output mouth, guidance panel output port respectively.
test connection circuit of the present invention, comprise test specimen, transformer, high-tension measurement capacitive divider, high-voltage connection, high-tension measurement capacitive divider comprises the first electric capacity and the second electric capacity, its structural feature test specimen one end ground connection, the test specimen other end is connected with transformer primary side one end, first electric capacity one end respectively by high-voltage connection, the first electric capacity other end is connected with second electric capacity one end, high-tension measurement line one end respectively, and the second electric capacity other end is connected with the high-tension measurement line other end, ground wire respectively; The transformer primary side other end is connected with high-tension current wiring; Transformer secondary two ends are connected with testing transformer low-voltage line.
as a kind of preferred version, transformer of the present invention is connected with testing transformer low pressure input interface, high pressure end interface by triple cable.
electronic working frequency withstand voltage test pressure regulation method, comprises the following steps.
after operating personnel are switched on power by guidance panel and set and once set automatically preserve by trial target withstand test voltage, pressure-resistant time, testing transformer no-load voltage ratio, voltage divider no-load voltage ratio, starting characteristics test device, the output voltage that microcomputer control module controls simple alternating current voltage regulating module automatically according to instruction starts boosting, the sinusoidal ac exported outputs to testing transformer low-pressure side by testing transformer low-voltage line, becomes high pressure be applied on tested device by testing transformer.
microcomputer control module reads the voltage data of high tension voltage analog to digital converter, if voltage be zero high-tension current analog to digital converter, low-tension current analog to digital converter current value normally, be judged as not connecing high-tension measurement, the voltage data being now automatically converted to low voltage voltage analog to digital converter is multiplied by the measurement data of high tension voltage as high tension voltage of testing transformer no-load voltage ratio conversion.
during boosting, after trial voltage is automatically started from scratch and is raised to 75% of required rating test voltage by the selected rate of rise, required trial voltage is raised to again with the speed of 2% rating test voltage per second, start the pressure-resistant time automatic pouring timing according to presetting, test specimen execute the alive time to rear automatic within the several seconds at the uniform velocity by voltage back to zero.
in whole process of the test microcomputer control module monitor all the time high-tension current analog to digital converter, high tension voltage analog to digital converter, low-tension current analog to digital converter, low voltage voltage analog to digital converter numerical value and be presented in LCDs, if any abnormal (change suddenly as voltage or electric current increases suddenly) step-down power-off automatically (making the output voltage of Sinusoidal wave pressure regulating device reduce to zero to the control signal of Sinusoidal wave pressure regulating device by changing microcomputer control module), and point out in LCDs.
under manual voltage boosting pattern, press emergency stop push button, automatically by output voltage fly back.
beneficial effect of the present invention.
the present invention adopts electronic pressure regulating mode, instead of traditional contact type voltage regulator, and without rotating or slipper, structure is more stable, and output waveform distortion is little, wiring is simple.
single-chip microcomputer entirety controls, electronic pressure regulating; Comprise buck, have high-low pressure voltage and current measurement, over-voltage over-current protection designs.
utilize analog to digital converter to change the electric current of mining height, low-pressure side and the analogue value of magnitude of voltage into digital signal and send microcomputer control module to, microcomputer control module controls the voltage of Sinusoidal wave pressure regulating device output by these signals.
the complete regulator of the program control power frequency withstand test of Electron portable does not have traditional contact to be pressure regulator, and volume is little, lightweight, waveform is perfect, automaticity is high, integrated level is high, practical, novel in design, simple to operate.
Accompanying drawing explanation
below in conjunction with the drawings and specific embodiments, the present invention will be further described.Scope is not only confined to the statement of following content.
fig. 1 is one-piece construction schematic diagram of the present invention.
fig. 2 is guidance panel schematic diagram of the present invention.
fig. 3 is test connection schematic diagram of the present invention.
fig. 4 is brief test wiring schematic diagram of the present invention.
fig. 5 is microcomputer control module schematic diagram of the present invention.
Embodiment
as shown in the figure, the present invention is a kind of regulator of power frequency withstand test, inner integrated high-and-low-voltage voltage and current measurement, pressure regulator, over-voltage over-current protection device.The present invention inside connects as illustrated in fig. 1 and 2, at automatic mode at present, operating personnel are switched on power by guidance panel 3 and set by after trial target withstand test voltage (parameter such as pressure-resistant time, testing transformer no-load voltage ratio, voltage divider no-load voltage ratio once sets automatic preservation), starting characteristics test device, the output voltage that microcomputer control module 2 controls simple alternating current voltage regulating module 1 automatically according to instruction starts boosting, the sinusoidal ac exported outputs to testing transformer low-pressure side by testing transformer low-voltage line 11, becomes high pressure be applied on tested device by testing transformer.Microcomputer control module 2 reads the voltage data of high tension voltage analog to digital converter 6, if voltage be zero high-tension current analog to digital converter 5, low-tension current analog to digital converter 7 current value normally, be judged as not connecing high-tension measurement, the voltage data being now automatically converted to low voltage voltage analog to digital converter 8 is multiplied by the measurement data of high tension voltage as high tension voltage of testing transformer no-load voltage ratio conversion.After during boosting, trial voltage is automatically started from scratch and is raised to 75% of required rating test voltage by the selected rate of rise, required trial voltage is raised to again with the speed of 2% rating test voltage per second, start the pressure-resistant time automatic pouring timing according to presetting, test specimen execute the alive time to rear automatic within the several seconds at the uniform velocity by voltage back to zero.In whole process of the test microcomputer control module 2 monitor all the time high-tension current analog to digital converter 5, high tension voltage analog to digital converter 6, low-tension current analog to digital converter 7, low voltage voltage analog to digital converter 8 numerical value and be presented in LCDs 12, if any abnormal automatic step-down power-off, and point out in LCDs 12.
shown in guidance panel Fig. 2 of the present invention, be used for realizing the setting of the functions such as trial voltage, pressure-resistant time, testing transformer no-load voltage ratio, voltage divider no-load voltage ratio, over-voltage over-current protection, and manual voltage boosting pattern can be switched to.Also there is emergency stop push button 18, as long as it is then automatic by output voltage fly back no matter to press emergency stop push button 18 devices under automatic boosting pattern and manual voltage boosting pattern, ensure the safety of operating personnel and test specimen.
test connection of the present invention as shown in Figure 3, when external high-tension measurement voltage divider, high-tension measurement capacitive divider 21 and test specimen 19 are connected on high-voltage connection 22, the signal wire of high-tension measurement capacitive divider 21 connects high-voltage bleeder interface 13, high-voltage bleeder interface 13 is a two core plug, interior even high-tension measurement line 10.The input of testing transformer low pressure and high pressure end interface 14 are a three-prong plug, interior even high-tension current wiring 9 and testing transformer low-voltage line 11.Low pressure and transformer end triple cable 23 be connected to the testing transformer 20 of the program control power frequency withstand test regulator 24 of Electron portable low pressure input and high pressure end terminals on.
at simplified wiring (without external high-tension measurement voltage divider) as shown in Figure 4, low pressure is only needed to be connected the program control power frequency withstand test regulator 24 of Electron portable and testing transformer 20 with transformer end triple cable 23; High-voltage bleeder interface 13 not wiring.
microcomputer control module schematic diagram of the present invention is as Fig. 5, CPU(single-chip microcomputer) the input instruction of read operation panel 3, digital signal is sent to D/A digital to analog converter through calculating, the signal of reception is converted into analog voltage and exports to simple alternating current voltage regulating module 1 by D/A digital to analog converter, high voltage is become after testing transformer 20, the voltage signal VH that high-tension measurement capacitive divider 21 records sends to CPU by A/D 6 analog to digital converter, low-pressure side voltage signal VL sends to CPU by A/D 8 analog to digital converter, high voltage side current signal IH sends to CPU by A/D 5 analog to digital converter, low-pressure side current signal IL sends to CPU by A/D 7 analog to digital converter, tested device state is judged by these four signals, the mode of connection, regulator state, CPU adjustment sends to the digital signal of D/A digital to analog converter, realize the closed-loop control of voltage, the instantaneous value of high and low pressure side voltage and current is presented in LCDs 12.
the present invention adopts electronic pressure regulating mode, instead of traditional contact type voltage regulator, and without rotating or slipper, structure is more stable, and output waveform distortion is little.Lower of normal condition need input trial voltage can carry out withstand voltage test, automatic lifting pressure, operates very easy, and wiring is simple, and test efficiency is high.Length, width and height of the present invention are respectively that 400mm*300mm*200mm volume is little, and lightweight Whole Equipment weight is less than 5 kilograms, be convenient to mobile, security is high.Production cost of the present invention is low simultaneously, is particularly suitable for the generally outfit of test teams and groups of power industry basic unit.
be understandable that, above about specific descriptions of the present invention, the technical scheme described by the embodiment of the present invention is only not limited to for illustration of the present invention, those of ordinary skill in the art is to be understood that, still can modify to the present invention or equivalent replacement, to reach identical technique effect; Needs are used, all within protection scope of the present invention as long as meet.
Claims (6)
1.
electronic working frequency withstand voltage test regulator, comprises Sinusoidal wave pressure regulating module, microcomputer control module, guidance panel, Switching Power Supply, high-tension current analog to digital converter, high tension voltage analog to digital converter, low-tension current analog to digital converter, low voltage voltage analog to digital converter, high-tension current wiring, high-tension measurement line, testing transformer low-voltage line, it is characterized in that microcomputer control module port respectively with Sinusoidal wave pressure regulating module port, guidance panel port, Switching Power Supply port, high-tension current analog to digital converter port, high tension voltage analog to digital converter port, low-tension current analog to digital converter port, low voltage voltage analog to digital converter port is connected, high tension voltage analog to digital converter port is connected with high-tension current wiring, high tension voltage analog to digital converter port is connected with high-tension measurement line, Sinusoidal wave pressure regulating module port is connected with testing transformer low-voltage line, low voltage voltage analog to digital converter input port one end is connected with resistance R2 one end, the resistance R2 other end respectively with the low voltage voltage analog to digital converter input port other end, resistance R3 one end is connected, and the resistance R3 other end is connected with testing transformer low-voltage line, low-tension current analog to digital converter input end is connected with testing transformer low-voltage line by Hall element.
2.
electronic working frequency withstand voltage test regulator according to claim 1, it is characterized in that described guidance panel is provided with LCDs, high-voltage bleeder interface, testing transformer low pressure input interface, high pressure end interface, function selection area, the power switch of described Switching Power Supply, function key and numerical key panel, emergency stop push button, high-voltage bleeder interface is connected with described high-tension measurement line, testing transformer low pressure input interface is connected with described testing transformer low-voltage line, high pressure end interface is connected with described high-tension current wiring, LCDs port, function selection area port, function key is connected with microcomputer control module port respectively with numerical key panel port, emergency stop push button port is connected with Sinusoidal wave pressure regulating module control port.
3.
electronic working frequency withstand voltage test regulator according to claim 2, it is characterized in that described microcomputer control module comprises CPU, D/A digital to analog converter, CPU output port respectively with LCDs input port, D/A digital to analog converter input port is connected, D/A digital to analog converter output port is connected with described simple alternating current voltage regulating module input port, CPU input port respectively with described high-tension current AfD converter output mouth, high tension voltage AfD converter output mouth, low-tension current AfD converter output mouth, low voltage voltage AfD converter output mouth, guidance panel output port is connected.
4.
the test connection circuit of electronic working frequency withstand voltage test regulator described in claim 3, it is characterized in that comprising test specimen, transformer, high-tension measurement capacitive divider, high-voltage connection, high-tension measurement capacitive divider comprises the first electric capacity and the second electric capacity, its structural feature test specimen one end ground connection, the test specimen other end is connected with transformer primary side one end, first electric capacity one end respectively by high-voltage connection, the first electric capacity other end is connected with second electric capacity one end, high-tension measurement line one end respectively, and the second electric capacity other end is connected with the high-tension measurement line other end, ground wire respectively; The transformer primary side other end is connected with high-tension current wiring; Transformer secondary two ends are connected with testing transformer low-voltage line.
5.
according to claim 4, test connection circuit, is characterized in that described transformer is connected with testing transformer low pressure input interface, high pressure end interface by triple cable.
6.
electronic working frequency withstand voltage test pressure regulation method, is characterized in that comprising the following steps:
after operating personnel are switched on power by guidance panel and set and once set automatically preserve by trial target withstand test voltage, pressure-resistant time, testing transformer no-load voltage ratio, voltage divider no-load voltage ratio, starting characteristics test device, the output voltage that microcomputer control module controls simple alternating current voltage regulating module automatically according to instruction starts boosting, the sinusoidal ac exported outputs to testing transformer low-pressure side by testing transformer low-voltage line, becomes high pressure be applied on tested device by testing transformer;
microcomputer control module reads the voltage data of high tension voltage analog to digital converter, if voltage be zero high-tension current analog to digital converter, low-tension current analog to digital converter current value normally, be judged as not connecing high-tension measurement, the voltage data being now automatically converted to low voltage voltage analog to digital converter is multiplied by the measurement data of high tension voltage as high tension voltage of testing transformer no-load voltage ratio conversion;
during boosting, after trial voltage is automatically started from scratch and is raised to 75% of required rating test voltage by the selected rate of rise, required trial voltage is raised to again with the speed of 2% rating test voltage per second, start the pressure-resistant time automatic pouring timing according to presetting, test specimen execute the alive time to rear automatic within the several seconds at the uniform velocity by voltage back to zero;
in whole process of the test microcomputer control module monitor all the time high-tension current analog to digital converter, high tension voltage analog to digital converter, low-tension current analog to digital converter, low voltage voltage analog to digital converter numerical value and be presented in LCDs, if any abnormal automatic step-down power-off, and point out in LCDs.
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Cited By (5)
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| CN108152689A (en) * | 2017-12-27 | 2018-06-12 | 国家电网公司 | High voltage electric equipment experimental bench and experimental system |
| CN108508330A (en) * | 2017-02-26 | 2018-09-07 | 武汉市欧睿科技有限公司 | Industrial frequency AC resistance test method |
| CN108572618A (en) * | 2018-07-11 | 2018-09-25 | 国网江苏省电力有限公司太仓市供电分公司 | A kind of hand-held control terminal |
| CN108594094A (en) * | 2018-07-11 | 2018-09-28 | 国网江苏省电力有限公司太仓市供电分公司 | A kind of light-duty integrated industrial frequency withstand voltage experimental rig |
| CN108594095A (en) * | 2018-07-11 | 2018-09-28 | 国网江苏省电力有限公司太仓市供电分公司 | A kind of testing transformer regulator |
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