CN105353335A - Automatic verification device for AC potentiometer and automatic verification method - Google Patents
Automatic verification device for AC potentiometer and automatic verification method Download PDFInfo
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- CN105353335A CN105353335A CN201510813423.XA CN201510813423A CN105353335A CN 105353335 A CN105353335 A CN 105353335A CN 201510813423 A CN201510813423 A CN 201510813423A CN 105353335 A CN105353335 A CN 105353335A
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Abstract
The invention relates to an automatic verification device for an AC potentiometer. The automatic verification device comprises an industrial control computer system, a wideband high-stability power source, an intermediate frequency boosting transformer and a standard wideband voltage divider which are sequentially connected, wherein the standard wideband voltage divider is connected in parallel with a to-be-verified AC voltage divider, the industrial control computer system is used for emitting a control signal to control the wideband high-stability power source for outputting voltage frequency and amplitude according a preset voltage detection point, voltage sampling for the standard wideband voltage divider is realized, feedback of an error between a voltage of a high voltage end of the automatic control adjustment standard wideband voltage divider and a target setting voltage is employed, when the voltage of the high voltage end of the standard wideband voltage divider reaches the preset voltage detection point, boosting stops automatically, the intermediate frequency boosting transformer is used for outputting an output voltage of the wideband high-stability power source after boosting to the standard wideband voltage divider and the to-be-verified AC voltage divider. Through the automatic verification device, the output voltage is stable, a waveform distortion rate is small, frequency offset is small, reading change of a capacitance-resistance voltage divider caused by a voltage quality problem can be avoided, the whole detection and verification process is an automatic process, and operation faults caused by manual voltage adjustment or mechanical voltage adjustment can be avoided.
Description
Technical field
The present invention relates to the robotization calibration technology field of electric system high pressure dosing apparatus, specifically a kind of AC potentiometer automatic check device and method.
Background technology
The high pressure dosing apparatus such as AC potentiometer need its reading value and standard metering devices to contrast when carrying out metering verification, therefore in checking procedure, need the high pressure detected high pressure dosing apparatus and the input of standard high-voltage metering outfit being up to rated voltage, now required power supply capacity is very large, civil power usually can only be used to add pressure regulation change or inverter and boost as the input power of intermediate frequency step-up transformer.The fluctuation of civil power is comparatively large and irregularity of wave form may be higher, there is certain fluctuation in frequency, the reading so just causing the standard metering devices when verifying also can be beated always, and because the impact of frequency and irregularity of wave form, also there is certain error in standard metering devices as a reference, and civil power adds adjustable transformer can only verify for the power frequency voltage divider of 50Hz; And when using the power supply of inverter as intermediate frequency step-up transformer, the aberration rate of usual output waveform is higher, and there is a large amount of disturbing high frequency components, the reading that wherein high frequency interference can have a strong impact on voltage divider makes the reading of detected AC potentiometer produce fluctuation and zero drift.
Summary of the invention
For the above-mentioned deficiency of prior art, the invention provides a kind of AC potentiometer automatic check device and method, the step-down of checking procedure automatic boosting and voltage stabilizing can be realized, verification frequency is from 30Hz ~ 300Hz, during verification, output voltage is highly stable and harmonic content is extremely low, whole boost process medium frequency and irregularity of wave form very little, thus frequency change can be avoided to cause the reading to hindering capacitive divider to change, whole detection and checking procedure automatically, can avoid manual voltage regulation or the error of mechanical pressure regulation process operation.
A kind of AC potentiometer automatic check device, comprises the industrial computer system, wideband height voltage-stabilizing power supply, intermediate frequency step-up transformer, the standard wide frequency division depressor that connect successively, and standard wide frequency division depressor is used for being connected in parallel with AC potentiometer to be checked;
Described industrial computer system, for the voltage detecting point that basis presets, send frequency and amplitude that control signal controls wideband height voltage-stabilizing power supply output voltage, voltage sample is carried out to standard wide frequency division depressor, adopt the voltage of feedback automatic control and adjustment standard wide frequency division depressor high-pressure side and the error of goal-setting voltage, automatically stop boosting when the voltage of standard wide frequency division depressor high-pressure side reaches the voltage detecting point preset;
Described wideband height voltage-stabilizing power supply comprises controller, standard signal generator, high power switching power supply, linear prower amplifier module, output filter, the control signal that described controller sends for receiving described industrial computer system, described control signal is sent into standard signal generator and produces standard sine wave, the isolating transformer that described linear prower amplifier module comprises 8 power amplifier modules in parallel and connects with each power amplifier module output terminal, the standard sine voltage that described standard signal generator produces becomes 8 groups of linear prower amplifier ac voltage signals after 8 power amplifier modules amplify, then the alternating voltage of 0 ~ 400V is produced through isolating transformer output cascade, the output voltage of wideband height voltage-stabilizing power supply is obtained after output filter filtering,
Described intermediate frequency step-up transformer exports standard wide frequency division depressor and AC potentiometer to be checked to after being used for the output voltage boosting to wideband height voltage-stabilizing power supply.
AC potentiometer automatic check device as above, described wideband height voltage-stabilizing power supply also comprises high power switching power supply, for by A.C. contactor, isolating switch access civil power, 8 power amplifier modules that the DC voltage producing 8 groups of positive and negative 70V is respectively linear prower amplifier module are powered.
AC potentiometer automatic check device as above; described wideband height voltage-stabilizing power supply also comprises current foldback circuit, the temperature sensor be arranged in linear prower amplifier module; output filter is connected with current foldback circuit; detection signal output terminal of crossing in current foldback circuit is connected with controller with temperature sensor; when current foldback circuit detects that output current overload or temperature sensor detect that temperature is crossed in limited time, controller sends emergency protection order to long-range industrial computer system to cut off the power supply of linear power amplifier module.
AC potentiometer automatic check device as above; described industrial computer system comprises industrial computer, data acquisition and control circuit, the A.C. contactor control coil be located on A.C. contactor; data acquisition is connected with industrial computer with control circuit; A.C. contactor control coil is connected with control circuit with data acquisition; after receiving the emergency protection order that wideband height voltage-stabilizing power supply sends, industrial computer controls A.C. contactor control coil by data acquisition and control circuit and A.C. contactor is disconnected cutting off mains-supplied.
AC potentiometer automatic check device as above, described industrial computer system also comprises the display be connected with industrial computer, described data acquisition and control circuit also for the voltage of standard wide frequency division depressor high-pressure side that will receive and the output current voltage signal of wideband height voltage-stabilizing power supply, and show over the display.
A kind of AC potentiometer automatic Verification method, it is applied above-mentioned AC potentiometer automatic check device and carries out following steps:
Step one, in industrial computer system, preset voltage detecting point, AC potentiometer to be checked and standard wide frequency division depressor are connected in parallel, simultaneously by AC potentiometer to be checked and digital voltage list catenation;
Step 2, industrial computer system are according to the voltage detecting point preset, send frequency and amplitude that control signal controls wideband height voltage-stabilizing power supply output voltage, standard wide frequency division depressor gathers actual output HIGH voltage value and sends into industrial computer system, after comparing with the target voltage of setting, difference is realized adjustment to wideband stabilized voltage supply as control signal by industrial computer system, make the error of target voltage and the actual voltage exported minimum, automatically stop boosting when the voltage of standard wide frequency division depressor high-pressure side reaches the voltage detecting point preset;
The reading of step 3, the standard voltage value of record industrial computer system display and the AC potentiometer to be checked of digital voltmeter display, evaluates the voltage check of tested AC potentiometer relatively, then returns step 2, until complete the calibration of all electrical voltage points.
AC potentiometer automatic Verification method as above, after the controller of the height of wideband described in step 2 voltage-stabilizing power supply receives the control signal that described industrial computer system sends, described control signal is sent into standard signal generator and produces standard sine wave, the standard sine voltage that described standard signal generator produces becomes 8 groups of linear prower amplifier ac voltage signals after 8 power amplifier modules amplify, then produce the alternating voltage of 0 ~ 400V through isolating transformer output cascade, after output filter filtering, obtain the output voltage of wideband height voltage-stabilizing power supply.
AC potentiometer automatic Verification method as above; current foldback circuit in described wideband height voltage-stabilizing power supply detects that output current overload or temperature sensor detect that temperature is crossed in limited time, and controller sends emergency protection order to long-range industrial computer system to cut off the power supply of linear power amplifier module.
AC potentiometer automatic Verification method as above; described industrial computer system is after receiving the emergency protection order that wideband height voltage-stabilizing power supply sends, and industrial computer controls A.C. contactor control coil by data acquisition and control circuit and A.C. contactor is disconnected cutting off mains-supplied.
Beneficial effect of the present invention is:
1, traditional method of inspection is boosted based on city's electrical connection pressure regulator and intermediate frequency step-up transformer, frequency due to civil power is 50Hz (frequency departure ± 0.2Hz), affect the no-load voltage ratio of resistance-capacitance type voltage divider and produce measuring error, and can only test to power frequency depressor (50Hz), cannot test to the different frequency characteristic of wide frequency division depressor; The method of inspection of this device connects intermediate frequency step-up transformer based on wideband height voltage-stabilizing power supply and boosts, and the output voltage frequency scope provided is 30 ~ 300Hz, and output frequency error is less than 0.01Hz, can realize testing to the different frequency characteristic of wide frequency division depressor.
2, traditional method of inspection makes power supply by civil power to connect pressure regulator and intermediate frequency step-up transformer and boost, city's electro-mechanical wave large (380/220V circuit rated voltage permissible variation ± 7%), irregularity of wave form high (being not more than 5%), standard AC voltage divider reading is beated thereupon.If tested AC potentiometer nominal accuracy higher (1%, 0.5% or higher), cannot measure accurately; The method of inspection of this device connects intermediate frequency step-up transformer based on wideband height voltage-stabilizing power supply and boosts, the output voltage of wideband height voltage-stabilizing power supply amplifies based on linear power amplifier, irregularity of wave form and the high fdrequency component content of output signal are extremely low, thus the alternating voltage of driving intermediate frequency step-up transformer can be made to accomplish highly stable, sine wave output irregularity of wave form is less than 1%, and the fluctuation of output sinusoidal voltage and flickering are less than 0.1%.
3, traditional method of inspection is manual or mechanical pressure regulation, and voltage regulation accuracy is not high, and manual voltage regulation exists the possibility of misoperation; This device realizes the step-down of checkout procedure automatic boosting and voltage stabilizing, realizes automatically reading record standard AC potentiometer indicating value, automatically generates examining report, automatically detects resonance and self-adaptative adjustment step-length, avoids the misoperation of manual or mechanical pressure regulation.
Accompanying drawing explanation
Fig. 1 is the fundamental diagram of AC potentiometer automatic check device of the present invention;
Fig. 2 is the electrical block diagram of wideband height voltage-stabilizing power supply in the present invention;
Fig. 3 is the electrical block diagram of Fig. 2 linear power amplification module;
Fig. 4 is the inside theory diagram of industrial computer system in the present invention;
Fig. 5 is the schematic flow sheet of AC potentiometer automatic Verification method of the present invention.
In figure: 1-industrial computer system; 2-wideband height voltage-stabilizing power supply; 3-intermediate frequency step-up transformer, 4-standard wide frequency division depressor, 5-AC potentiometer to be checked; 6-digital voltmeter; 11-industrial computer, 12-data acquisition and control circuit, 13-display; 14-A.C. contactor control coil; 21-controller, 22-standard signal generator, 23-high power switching power supply; 24-linear prower amplifier module; 25-output filter, 26-current foldback circuit, 27-temperature sensor; 241-power amplifier module, 242-isolating transformer.
Embodiment
Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is clearly and completely described.
Figure 1 shows that the fundamental diagram of AC potentiometer automatic check device of the present invention, it is for verifying AC potentiometer 5 to be checked, described AC potentiometer automatic check device comprises the industrial computer system 1 connected successively, wideband height voltage-stabilizing power supply 2, intermediate frequency step-up transformer 3, standard wide frequency division depressor 4, digital voltmeter 6, standard wide frequency division depressor 4 and AC potentiometer 5 to be checked are connected in parallel, the low-voltage arm of standard wide frequency division depressor 4 is connected with industrial computer system 1, for by the Voltage Feedback of standard wide frequency division depressor 4 high-pressure side to industrial computer system 1, digital voltmeter 6 is connected with AC potentiometer 5 to be checked, digital voltmeter 6 is for showing interchange dividing potential drop to be checked, the voltage of 5, this magnitude of voltage of testing crew record, record the standard voltage value that industrial computer system 1 shows simultaneously, then the voltage check of tested AC potentiometer 5 is evaluated.
Described industrial computer system 1, frequency and the amplitude of wideband height voltage-stabilizing power supply 2 output voltage is controlled for being sent control signal by RS232 communication port, standard wide frequency division depressor 4 gathers actual output HIGH voltage value and sends into industrial computer system 1, after comparing with the target voltage of setting, using difference as the adjustment of control signal realization to wideband stabilized voltage supply 2, make the error of target voltage and the actual voltage exported minimum.Automatically stop when the voltage of standard wide frequency division depressor 4 high-pressure side reaches the check point preset boosting (stopping transmitting control signal to wideband height voltage-stabilizing power supply 2).
Please further refer to Fig. 2, described wideband height voltage-stabilizing power supply 2 comprises controller 21, standard signal generator 22, high power switching power supply 23, linear prower amplifier module 24, output filter 25, current foldback circuit 26, temperature sensor 27.
One of them signal input part of described controller 21 (such as high-speed microprocessor C8051F020) is connected with industrial computer system 1 by RS232 communication port, for receiving the control signal that industrial computer system 1 sends, the control signal end of described controller 21 is connected with described standard signal generator 22, produces standard sine wave control signal to be sent into standard signal generator 22 (such as DCS chip AD9851).
Described high power switching power supply 23 is for accessing civil power (namely three-phase main-frequency AC power is its power supply) by A.C. contactor, isolating switch, the DC voltage producing 8 groups of positive and negative 70V is that linear prower amplifier module 24 is powered.The output terminal of described linear prower amplifier module 24 is connected successively with output filter 25, current foldback circuit 26; detection signal output terminal of crossing in current foldback circuit 26 is connected with controller 21 with temperature sensor 27; temperature sensor 27 is arranged in linear prower amplifier module 24; wherein cross detection signal output terminal to be used for sending the output current signal of detection to controller 21; temperature sensor 27 is placed near linear prower amplifier module 24; for the temperature of Real-Time Monitoring linear prower amplifier module 24, and send controller 21 to.
Described standard signal generator 22 produces standard sine voltage under controller 21 controls, and then enters linear prower amplifier module 24 and amplifies.Please further refer to Fig. 3, the isolating transformer 242 that described linear prower amplifier module 24 comprises 8 power amplifier modules 241 in parallel and connects with each power amplifier module 241 output terminal, the standard sine voltage that described standard signal generator 22 produces becomes 8 groups of linear prower amplifier ac voltage signals after 8 power amplifier modules 241 amplify, then the alternating voltage of 0 ~ 400V is produced through isolating transformer 242 output cascade, the superposition amplification realizing power exports with superposing of voltage, the output voltage of wideband height voltage-stabilizing power supply 2 is obtained again after output filter 25 filtering.Because the output voltage of isolating transformer 242 derives from linear power amplifier, so the irregularity of wave form of output voltage is extremely low, the high fdrequency component content of output voltage signal is extremely low.Therefore the alternating voltage of driving-intermediate frequency step-up transformer is highly stable, and the high-voltage value that whole calibration equipment produces is just highly stable.
The controller 21 of wideband height voltage-stabilizing power supply 2 receives the control signal that industrial computer system 1 sends through RS232, send into standard signal generator 22 and produce standard sine wave control linear power amplifier module 24, thus change output voltage frequency and the amplitude of wideband height voltage-stabilizing power supply 2.The control signal that wideband height voltage-stabilizing power supply 2 output voltage is only sent by industrial computer system 1 determines; not by the impact of voltage ripple of power network; whole measuring process middle controller 21 constantly detects the amplitude of output current and the temperature of linear prower amplifier module 24; controller 21 is crossed when output current overload or temperature and is started overcurrent protection or temperature detection protection in limited time at once, sends emergency protection order to long-range industrial computer system 1 to cut off the power supply of linear power amplifier module 24.The output power of whole wideband height voltage-stabilizing power supply 2 is not less than 20KVA, and output voltage amplitude is 0 ~ 200V and 0 ~ 400V, two gears.
Described intermediate frequency step-up transformer 3 is connected with standard wide frequency division depressor 4, the on high-tension side voltage of standard wide frequency division depressor 4 adds to detected equipment (i.e. AC potentiometer 5 to be checked), and passes through waveform and the numerical value of standard wide frequency division depressor 4 real time record output voltage.After the reading that user inputs detected equipment, device is automatic boosting extremely next check point again.The output voltage range of device is 0 ~ 200kV, and irregularity of wave form lower than 1%, and exports sinusoidal voltage undulating quantity and is less than 0.1% reading+0.01kV, and frequency error is less than 0.01Hz.
Described intermediate frequency step-up transformer 3 is a kind of electromagnetic type transformers, and the frequency range of its input and output voltage is 30 ~ 300Hz, input voltage 0 ~ 440V, output voltage 0 ~ 200kV.In order to ensure that intermediate frequency step-up transformer 3 reaches maximum output voltage and unsaturated (normally working) at 30Hz, the output rated power of intermediate frequency step-up transformer 3 under 50Hz power frequency is 2 times of wideband height voltage-stabilizing power supply 2 peak power output, and the power capacity of the iron core that intermediate frequency step-up transformer 3 uses is higher more than 1.67 times than the iron core capacity with Industrial Frequency Transformer under condition.Consider that intermediate frequency step-up transformer 3 output voltage is higher and capacity is comparatively large, its inner insulation material selects SF6 gas.The low pressure that intermediate frequency step-up transformer 3 also possesses one group of measuring coil and intermediate frequency step-up transformer 3 inputs winding and uses as measuring voltage mutual inductor on same iron core, its rated output voltage is 100V, for monitoring High voltage output in intermediate frequency step-up transformer 3 course of work.
Please further refer to Fig. 4, described industrial computer system 1 comprises industrial computer 11, data acquisition and control circuit 12, display 13, A.C. contactor control coil 14.Data acquisition is connected with industrial computer 11 with control circuit 12 and display 13, and A.C. contactor control coil 14 is connected with control circuit 12 with data acquisition.The operation computing machine that described industrial computer 11 comprises operating console and is connected with operating console, operation computing machine is for receiving the magnitude of voltage to be checked of input, operating console is provided with 4 digital panel meters, power supply closes button, power supply divides button, emergency stop push button, wherein power supply closes button is that on-test control wideband height voltage-stabilizing power supply is 2-in-1, power supply divides button to be that off-test controls wideband height voltage-stabilizing power supply 2 points, and emergency stop push button is interim cut-out wideband height voltage-stabilizing power supply 2 in operating process.Data acquisition and control circuit 12 are for showing the voltage of the standard received wide frequency division depressor 4 high-pressure side and the input voltage of intermediate frequency step-up transformer 3 and input current signal (the input current voltage signal of intermediate frequency step-up transformer 3 is the output current voltage signal of wideband height voltage-stabilizing power supply 2) on the monitor 13, the output voltage of industrial computer system 1 monitoring standard wide frequency division depressor 4 in whole process of the test, the output voltage of wideband height voltage-stabilizing power supply 2 and the amplitude of electric current, realize the running status of the whole auto-calibration system of monitoring, once the abnormal high voltage supply system cutting off whole device at once, such as, after receiving the emergency protection order that wideband height voltage-stabilizing power supply 2 sends, industrial computer 11 controls A.C. contactor control coil 14 by data acquisition and control circuit 12 and is disconnected by A.C. contactor, to cut off mains-supplied, wideband height voltage-stabilizing power supply 2 is protected.
A.C. contactor control coil 14 is for controlling the input power of wideband height voltage-stabilizing power supply 2; once control software design detects system exception; industrial computer 11 disconnects A.C. contactor control coil 14 through data acquisition and control circuit 12, thus cuts off three phase supply power supply to protect wideband height voltage-stabilizing power supply 2.The industrial computer of operating console passes through the output voltage values of RS232 port controlling wideband height voltage-stabilizing power supply 2, and is constantly gathered by data acquisition and control circuit 12 and monitor the output high-voltage value of the output voltage of wideband height voltage-stabilizing power supply 2, output current and intermediate frequency step-up transformer.
Standard wide frequency division depressor 4 is a kind of pure capacitive divider, and high voltage arm capacitor is 100pF, and dielectric loss value is less than 0.00001, and in order to ensure the stable of its electric capacity, high-voltage capacitance inner insulation material adopts SF6 gas.Low-voltage arm is made up of the wideband high stability mica capacitor of 4 × 1 μ F, and the precision resistance of a 1M Ω in parallel at 4 mica capacitor two ends, effect discharges the energy remained on mica capacitor, when ensureing that each measurement is initial, 4 μ F electric capacity of low-voltage arm are boost from zero potential all the time, there is not DC component deviation.Cause the impact of voltage divider ratio error can introduce a frequency transformer ratio check factor K by 1M Ω resistance in parallel
f, revised by acquisition system, ensure that measuring accuracy.K
fwith the frequency dependence of signal on Current standards wide frequency division depressor, the frequency of signal and amplitude are controlled to apply and acquisition process by control module, are very easy to realize to the verification of frequency.
Below for device provided by the invention realizes the principle of work of robotization pressure regulation process control:
Described industrial computer system 1 is built with regard to control software design, and its process flow diagram as shown in Figure 5.To be detected as example to 200kV power frequency voltage divider, rising and decline process electrical voltage point to be detected are set: 20kV, 40kV, 60kV ... 160kV, 180kV, 200kV, arrange electric voltage frequency 50Hz.Device is started from scratch boosting, and keep output voltage when reaching 20kV, now operating personnel record the reading of the AC potentiometer to be checked 5 that digital voltmeter 6 shows, and then device continues automatic boosting to next electrical voltage point, the like complete the calibration of all electrical voltage points.
To the voltage rise drop point of verification be needed to be arranged in industrial computer system 1 before the test.Standard wide frequency division depressor 4 gathers actual output HIGH voltage value, and with the difference of target voltage of setting as feedback signal, industrial computer system 1 controls the output voltage change of wideband height voltage-stabilizing power supply 2.When difference is less than 0.1kV, output voltage keeps stable.In whole checking procedure, industrial computer system 1 constantly monitors output voltage and the output current situation of wideband height voltage-stabilizing power supply 2 by data acquisition and control circuit 12.When detecting that the input current peak value of intermediate frequency step-up transformer 3 is greater than suddenly 1.414 times of wideband height voltage-stabilizing power supply 2 maximum output current, think now test product generation puncture short, device cuts off the three phase supply loop of wideband height voltage-stabilizing power supply 2 at once; When detecting that the ratio of standard wide frequency division depressor 4 high-pressure side voltage and wideband height voltage-stabilizing power supply 2 output voltage is less than 95% of intermediate frequency step-up transformer 3 nominal transformation ratio, think that now loop is transshipped, device cuts off the three phase supply loop of wideband height voltage-stabilizing power supply 2 at once; When detecting that the output voltage ratio of standard wide frequency division depressor 4 high-pressure side voltage to wideband height voltage-stabilizing power supply 2 is greater than 110% of intermediate frequency step-up transformer 3 nominal transformation ratio, think that system there occurs resonance, now industrial computer system 1 adjusts the adjusting range of wideband height voltage-stabilizing power supply 2 output voltage, the step-length of such as change in voltage, to prevent the too fast generation superpotential of pressure regulation process.Concrete, specified change step is multiplied by Ns as new wideband height voltage-stabilizing power supply output voltage step-length, the computing formula of Ns is shown below:
Wherein Vs is the actual output voltage of wideband height voltage-stabilizing power supply 2, and Vp is the actual output voltage of intermediate frequency step-up transformer 3, and Kp is the nominal transformation ratio of intermediate frequency step-up transformer 3.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly belongs to those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (9)
1. an AC potentiometer automatic check device, it is characterized in that: comprise the industrial computer system (1), wideband height voltage-stabilizing power supply (2), intermediate frequency step-up transformer (3), the standard wide frequency division depressor (4) that connect successively, standard wide frequency division depressor (4) is for being connected in parallel with AC potentiometer to be checked (5);
Described industrial computer system (1), for the voltage detecting point that basis presets, send frequency and amplitude that control signal controls wideband height voltage-stabilizing power supply (2) output voltage, voltage sample is carried out to standard wide frequency division depressor (4), adopt the voltage of feedback automatic control and adjustment standard wide frequency division depressor (4) high-pressure side and the error of goal-setting voltage, automatically stop boosting when the voltage of standard wide frequency division depressor (4) high-pressure side reaches the voltage detecting point preset;
Described wideband height voltage-stabilizing power supply (2) comprises controller (21), standard signal generator (22), high power switching power supply (23), linear prower amplifier module (24), output filter (25), the control signal that described controller (21) sends for receiving described industrial computer system (1), described control signal is sent into standard signal generator (22) and produces standard sine wave, the isolating transformer (242) that described linear prower amplifier module (24) comprises 8 power amplifier modules (241) in parallel and connects with each power amplifier module (241) output terminal, the standard sine voltage that described standard signal generator (22) produces becomes 8 groups of linear prower amplifier ac voltage signals after 8 power amplifier modules (241) are amplified, then the alternating voltage of 0 ~ 400V is produced through isolating transformer (242) output cascade, the output voltage of wideband height voltage-stabilizing power supply (2) is obtained after output filter (25) filtering,
Described intermediate frequency step-up transformer (3) is for exporting standard wide frequency division depressor (4) and AC potentiometer to be checked (5) to after the output voltage boosting of wideband height voltage-stabilizing power supply (2).
2. AC potentiometer automatic check device as claimed in claim 1, it is characterized in that: described wideband height voltage-stabilizing power supply (2) also comprises high power switching power supply (23), for accessing civil power by A.C. contactor, isolating switch, the DC voltage producing 8 groups of positive and negative 70V is respectively 8 power amplifier modules (241) power supplies of linear prower amplifier module (24).
3. AC potentiometer automatic check device as claimed in claim 1 or 2, it is characterized in that: described wideband height voltage-stabilizing power supply (2) also comprises current foldback circuit (26), be arranged on the temperature sensor (27) in linear prower amplifier module (24), output filter (25) is connected with current foldback circuit (26), detection signal output terminal of crossing in current foldback circuit (26) is connected with controller (21) with temperature sensor (27), when current foldback circuit (26) detects that output current overload or temperature sensor (27) detect that temperature is crossed in limited time, controller (21) sends emergency protection order to long-range industrial computer system (1) to cut off the power supply of linear power amplifier module (24).
4. AC potentiometer automatic check device as claimed in claim 2, it is characterized in that: described industrial computer system (1) comprises industrial computer (11), data acquisition and control circuit (12), be located at the A.C. contactor control coil (14) on A.C. contactor, data acquisition is connected with industrial computer (11) with control circuit (12), A.C. contactor control coil (14) is connected with control circuit (12) with data acquisition, after receiving the emergency protection order that wideband height voltage-stabilizing power supply (2) sends, industrial computer (11) controls A.C. contactor control coil (14) by data acquisition and control circuit (12) and A.C. contactor is disconnected cutting off mains-supplied.
5. AC potentiometer automatic check device as claimed in claim 4, it is characterized in that: described industrial computer system (1) also comprises the display (13) be connected with industrial computer (11), described data acquisition and control circuit (12) also for the voltage of standard wide frequency division depressor (4) high-pressure side that will receive and the output current voltage signal of wideband height voltage-stabilizing power supply (2), and show on display (13).
6. an AC potentiometer automatic Verification method, is characterized in that application such as AC potentiometer automatic check device as described in arbitrary in claim 1-5 carries out following steps:
Step one, in industrial computer system (1), preset voltage detecting point, AC potentiometer to be checked (5) and standard wide frequency division depressor (4) are connected in parallel, AC potentiometer to be checked (5) are connected with digital voltmeter (6) simultaneously;
Step 2, industrial computer system (1) is according to the voltage detecting point preset, send frequency and amplitude that control signal controls wideband height voltage-stabilizing power supply (2) output voltage, standard wide frequency division depressor (4) gathers actual output HIGH voltage value and sends into industrial computer system (1), after comparing with the target voltage of setting, difference is realized adjustment to wideband stabilized voltage supply as control signal by industrial computer system (1), make the error of target voltage and the actual voltage exported minimum, automatically boosting is stopped when the voltage of standard wide frequency division depressor (4) high-pressure side reaches the voltage detecting point preset,
The reading of the standard voltage value that step 3, record industrial computer system (1) show and the AC potentiometer to be checked (5) that digital voltmeter (6) shows, relatively, the voltage check of tested AC potentiometer (5) is evaluated, then step 2 is returned, until complete the calibration of all electrical voltage points.
7. AC potentiometer automatic Verification method as claimed in claim 6, it is characterized in that: after the controller (21) of the height of wideband described in step 2 voltage-stabilizing power supply (2) receives the control signal that described industrial computer system (1) sends, described control signal is sent into standard signal generator (22) and produces standard sine wave, the standard sine voltage that described standard signal generator (22) produces becomes 8 groups of linear prower amplifier ac voltage signals after 8 power amplifier modules (241) are amplified, then the alternating voltage of 0 ~ 400V is produced through isolating transformer (242) output cascade, the output voltage of wideband height voltage-stabilizing power supply (2) is obtained after output filter (25) filtering.
8. AC potentiometer automatic Verification method as claimed in claim 6; it is characterized in that: the current foldback circuit (26) in described wideband height voltage-stabilizing power supply (2) detects that output current overload or temperature sensor (27) detect that temperature is crossed in limited time, and controller (21) sends emergency protection order to long-range industrial computer system (1) to cut off the power supply of linear power amplifier module (24).
9. AC potentiometer automatic Verification method as claimed in claim 8; it is characterized in that: described industrial computer system (1) is after receiving the emergency protection order that wideband height voltage-stabilizing power supply (2) sends, and industrial computer (11) controls A.C. contactor control coil (14) by data acquisition and control circuit (12) and A.C. contactor is disconnected cutting off mains-supplied.
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| CN201510813423.XA CN105353335B (en) | 2015-11-23 | 2015-11-23 | A kind of AC potentiometer automatic check device and method |
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| CN201510813423.XA CN105353335B (en) | 2015-11-23 | 2015-11-23 | A kind of AC potentiometer automatic check device and method |
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| CN105353335A true CN105353335A (en) | 2016-02-24 |
| CN105353335B CN105353335B (en) | 2018-01-05 |
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| CN105738853A (en) * | 2016-05-12 | 2016-07-06 | 苏州华电电气股份有限公司 | Automatic checking platform of high-voltage alternating-current voltage divider |
| CN105759235A (en) * | 2016-05-12 | 2016-07-13 | 苏州华电电气股份有限公司 | Automatic check platform for high-voltage direct-current voltage divider |
| CN108024031A (en) * | 2016-10-28 | 2018-05-11 | 福州瑞芯微电子股份有限公司 | The direct current restoration methods and device of a kind of AC signal |
| CN108089143A (en) * | 2017-12-29 | 2018-05-29 | 深圳市锐能微科技有限公司 | Detection circuit, method and the electric energy computation chip of bleeder circuit parameter |
| CN109239639A (en) * | 2018-11-14 | 2019-01-18 | 国家电网有限公司 | A kind of the 600kV wideband standard voltage divider and its application method of high accuracy |
| CN109254236A (en) * | 2018-11-14 | 2019-01-22 | 国家电网有限公司 | The field test of frequency conversion resonance vibration pressure-proof experimental rig wideband standard voltage divider and its application method |
| CN110617915A (en) * | 2019-09-29 | 2019-12-27 | 重庆大学 | Calibration system and method for coal and gas outburst dynamic pressure sensor |
| CN112415461A (en) * | 2020-10-28 | 2021-02-26 | 许继集团有限公司 | Period checking method and device for high-voltage divider |
| CN113341362A (en) * | 2021-08-05 | 2021-09-03 | 苏州浪潮智能科技有限公司 | Measurement correction method and device of sensor and server power supply |
| CN114236454A (en) * | 2021-12-03 | 2022-03-25 | 北京东方计量测试研究所 | Error calibration method and device of broadband resistor divider |
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| CN105759235A (en) * | 2016-05-12 | 2016-07-13 | 苏州华电电气股份有限公司 | Automatic check platform for high-voltage direct-current voltage divider |
| CN105738853A (en) * | 2016-05-12 | 2016-07-06 | 苏州华电电气股份有限公司 | Automatic checking platform of high-voltage alternating-current voltage divider |
| CN108024031B (en) * | 2016-10-28 | 2019-10-29 | 福州瑞芯微电子股份有限公司 | A kind of the direct current restoration methods and device of AC signal |
| CN108024031A (en) * | 2016-10-28 | 2018-05-11 | 福州瑞芯微电子股份有限公司 | The direct current restoration methods and device of a kind of AC signal |
| CN108089143A (en) * | 2017-12-29 | 2018-05-29 | 深圳市锐能微科技有限公司 | Detection circuit, method and the electric energy computation chip of bleeder circuit parameter |
| CN108089143B (en) * | 2017-12-29 | 2024-01-12 | 深圳市锐能微科技有限公司 | Detection circuit and method for voltage dividing circuit parameters and electric energy metering chip |
| CN109239639B (en) * | 2018-11-14 | 2023-09-12 | 国家电网有限公司 | High-accuracy 600kV broadband standard voltage divider and application method thereof |
| CN109254236A (en) * | 2018-11-14 | 2019-01-22 | 国家电网有限公司 | The field test of frequency conversion resonance vibration pressure-proof experimental rig wideband standard voltage divider and its application method |
| CN109239639A (en) * | 2018-11-14 | 2019-01-18 | 国家电网有限公司 | A kind of the 600kV wideband standard voltage divider and its application method of high accuracy |
| CN110617915A (en) * | 2019-09-29 | 2019-12-27 | 重庆大学 | Calibration system and method for coal and gas outburst dynamic pressure sensor |
| CN112415461A (en) * | 2020-10-28 | 2021-02-26 | 许继集团有限公司 | Period checking method and device for high-voltage divider |
| CN112415461B (en) * | 2020-10-28 | 2024-04-12 | 许继集团有限公司 | Period checking method and device for high-voltage divider |
| CN113341362A (en) * | 2021-08-05 | 2021-09-03 | 苏州浪潮智能科技有限公司 | Measurement correction method and device of sensor and server power supply |
| CN113341362B (en) * | 2021-08-05 | 2021-10-15 | 苏州浪潮智能科技有限公司 | Measurement correction method and device of sensor and server power supply |
| CN114236454A (en) * | 2021-12-03 | 2022-03-25 | 北京东方计量测试研究所 | Error calibration method and device of broadband resistor divider |
| CN114236454B (en) * | 2021-12-03 | 2024-05-28 | 北京东方计量测试研究所 | Error calibration method and device for broadband resistor divider |
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