CN206757021U - High voltage ac/dc voltmeter calibration detection means - Google Patents

High voltage ac/dc voltmeter calibration detection means Download PDF

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Publication number
CN206757021U
CN206757021U CN201720577674.7U CN201720577674U CN206757021U CN 206757021 U CN206757021 U CN 206757021U CN 201720577674 U CN201720577674 U CN 201720577674U CN 206757021 U CN206757021 U CN 206757021U
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CN
China
Prior art keywords
voltage
chip microcomputer
calibration detection
sample circuit
low
Prior art date
Application number
CN201720577674.7U
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Chinese (zh)
Inventor
蔡国清
Original Assignee
福建瑞能博尔电力设备有限公司
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Publication date
Application filed by 福建瑞能博尔电力设备有限公司 filed Critical 福建瑞能博尔电力设备有限公司
Priority to CN201720577674.7U priority Critical patent/CN206757021U/en
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Publication of CN206757021U publication Critical patent/CN206757021U/en

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Abstract

A kind of high voltage ac/dc voltmeter calibration detection means, technical points are that it is made up of host computer, communication serial ports, detector, detector it be made up of high-voltage bleeder, low pressure measurement circuit, low pressure measurement circuit is made up of single-chip microcomputer, display screen, A/D change-over circuits, sample circuit, single-chip microcomputer is connected by communicating serial ports with host computer, sample circuit, A/D change-over circuits, single-chip microcomputer, display screen are connected in order, and the low-pressure end of high-voltage bleeder is connected with sample circuit.The utility model is safe and reliable, can realize the intellectuality of automation, data analysis and the processing of the calibration detection work of 100 400kV combined-voltages tables.

Description

High voltage ac/dc voltmeter calibration detection means

Technical field

The utility model is a kind of high voltage ac/dc voltmeter calibration detection means.

Background technology

High voltage ac/dc voltmeter described in the utility model refers to 100-400kV combined-voltage table, in power train In system, high-tension apparatus is widely used, and these high-tension apparatuses are during preventative and commissioning test, it is necessary to substantial amounts of ac voltage withstanding Or DC break down voltage equipment.In order to ensure the safe and reliable operation of these high-tension apparatuses, it is necessary to have good detection device to it Running status accurately measure, detected.But alternating current-direct current it is pressure-resistant and it is this kind of using frequently, the high-voltage testing equipment of enormous amount When being tested, the management and diagnosis of its test report are quite cumbersome.In checkout procedure, it is contemplated that power-supply fluctuation, power supply line Ripple and drift environmental fluctuating, instrument use the factors such as synchronism, only manually read the indicating value of two pieces of instrument, meeting simultaneously by inspector Produce very big random error.Inspector examines every time, also to determine test point first, hand-kept initial data, calculate and miss Difference, typing detection data, makes survey report certificate, fills in censorship unit, the nameplate parameter of test equipment and manufacturing firm, hand Work typing pilot project counts.So using doing not only numerous and diverse but also easy error step by step by hand.

The content of the invention

The shortcomings that the purpose of this utility model is to overcome prior art to exist, there is provided one can realize calibration operation from Dynamicization, data analysis and the intelligentized high voltage ac/dc voltmeter calibration detection means of processing.

Technical scheme is a kind of high voltage ac/dc voltmeter calibration detection means used by the utility model, and its technology will Point is that it is made up of host computer, communication serial ports, detector, and it is made up of detector high-voltage bleeder, low pressure measurement circuit, Low pressure measurement circuit is made up of single-chip microcomputer, display screen, A/D change-over circuits, sample circuit, single-chip microcomputer by communicate serial ports with it is upper Machine connects, and sample circuit, A/D change-over circuits, single-chip microcomputer, display screen are connected in order, low-pressure end and the sampling electricity of high-voltage bleeder Road connects.

High voltage is become low-voltage by the utility model by high-voltage bleeder, and detection circuit directly takes from low-voltage end Sample, by partial pressure coefficient conversion into high tension voltage, the resistance to pressure of whole detection circuit is reduced, securely and reliably, passes through electric capacity, resistance The sample circuit that potential-divider network is formed, A/D conversions are given by signal condition, A/D is converted into digital code and enters single-chip microcomputer, by list Piece machine is analyzed data, is handled, shown and preserved, and the communication serial ports by matching with host computer is transmitted to host computer and entered Row processing, so as to realize the automation of calibration operation, data analysis and the intellectuality of processing.

High-voltage bleeder is RC divider, and low-pressure end is directly grounded.RC divider is directly grounded, and security performance compares It is good.

The connecting cable of detector is band shielded cable.

The utility model is safe and reliable, can realize automating, counting for 100-400kV combined-voltages table calibration detection work According to analysis and the intellectuality of processing.

Brief description of the drawings

Fig. 1 is the schematic diagram of the utility model detector

Fig. 2 is the functional-block diagram that the utility model low pressure measurement circuit is connected with host computer

Fig. 3 is the connection circuit diagram of high-voltage bleeder and sample circuit

Wherein:The A/D change-over circuits 34 of 1 host computer 2 communication serial ports 3 low pressure measurement circuit, 31 single-chip microcomputer, 32 display screen 33 are adopted The connecting cable of 35 high-voltage bleeder of sample circuit 4.

Embodiment

The utility model is described in detail with reference to view, the following examples can make this professional skill Art personnel more understand the utility model, but do not limit the utility model in any form.

As Figure 1-3, a kind of high voltage ac/dc voltmeter calibration detection means, it is by host computer 1, communication serial ports 2, inspection Instrument composition is surveyed, it is made up of detector high-voltage bleeder, low pressure measurement circuit 3, and high-voltage bleeder is RC divider, such as schemes Shown in 1, the connecting cable 4 of detector is connected with high pressure gauge to be verified, through high-voltage bleeder:Z1, Z2 carry out partial pressure, and Z1 is height Pressure arm impedance, Z2 are low-voltage arm impedance, and low-pressure end is directly grounded, low pressure measurement circuit 3(V in figure)Low-voltage arm impedance is carried out Measurement.Low pressure measurement circuit 3 is made up of single-chip microcomputer 31, display screen 32, A/D change-over circuits 33, sample circuit 34, and single-chip microcomputer 31 is logical Communication serial ports 2 to be crossed with host computer 1 to connect, sample circuit 34, A/D change-over circuits 33, single-chip microcomputer 31, display screen 32 are connected in order, The low-pressure end of high-voltage bleeder 35 is connected with sample circuit 34.

As shown in figure 3, the connection circuit diagram of high-voltage bleeder and sample circuit, C1, C2, R, R0 composition high-voltage bleeder, C1 carries out rectifying and wave-filtering, then pass through equivalent to the Z2 in Fig. 1 equivalent to the Z1 in Fig. 1, C2, R, R0 by diode and electric capacity A/D change-over circuits measure into single-chip microcomputer.

First measurement for negative peak in Fig. 3, D1, D2 therein are commutation diode, and he is unidirectional using diode Exchange is become direct current by electric conductivity.When Ux positive half-waves, D1 cut-offs D2 is turned on, and gives electric capacity to charge, last Ux=Uc, and then Uc is put Electric D1 conductings, enlargement ratio is adjusted by the variable resistor R3 of discharge circuit, because born during the voltage of conducting, all U1 are surveyed Amount is negative peak.Similarly, Article 3 U2 measurements is positive peak.

Article 2 measures for peak-to-peak value in Fig. 3, and D3, D4 therein are the diode of rectified action, when Ux positive half-waves, D3 D4 cut-offs are turned on, are charged to electric capacity, quickly U=Uc, then Uc electric discharges D4 conductings, the voltage of conducting is positive, but is passed through reverse Electric current is changed into negative by amplifier, and the circuit superposition of positive peak is then surveyed with front, is adjusted through the variable resistor R11 in discharge circuit Enlargement ratio is saved, so U3 measurements is peak-to-peak value.

Claims (3)

1. a kind of high voltage ac/dc voltmeter calibration detection means, it is characterised in that it is by host computer(1), communication serial ports(2), inspection Survey instrument composition, detector it be by high-voltage bleeder, low pressure measurement circuit(3)Composition, low pressure measurement circuit(3)By single-chip microcomputer (31), display screen(32), A/D change-over circuits(33), sample circuit(34)Composition, single-chip microcomputer(31)By communicating serial ports(2)With Host computer(1)Connect, sample circuit(34), A/D change-over circuits(33), single-chip microcomputer(31), display screen(32)It is connected in order, high pressure Divider(35)Low-pressure end and sample circuit(34)Connection.
A kind of 2. high voltage ac/dc voltmeter calibration detection means according to claim 1, it is characterised in that high pressure partial pressure Device is RC divider, and low-pressure end is directly grounded.
3. a kind of high voltage ac/dc voltmeter calibration detection means according to claim 1, it is characterised in that detector Connecting cable(4)For band shielded cable.
CN201720577674.7U 2017-05-23 2017-05-23 High voltage ac/dc voltmeter calibration detection means CN206757021U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720577674.7U CN206757021U (en) 2017-05-23 2017-05-23 High voltage ac/dc voltmeter calibration detection means

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720577674.7U CN206757021U (en) 2017-05-23 2017-05-23 High voltage ac/dc voltmeter calibration detection means

Publications (1)

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CN206757021U true CN206757021U (en) 2017-12-15

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CN201720577674.7U CN206757021U (en) 2017-05-23 2017-05-23 High voltage ac/dc voltmeter calibration detection means

Country Status (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108445280A (en) * 2018-03-13 2018-08-24 广东里田电力工业有限公司 A kind of voltmeter with fault cues
CN108957380A (en) * 2018-07-25 2018-12-07 内蒙古送变电有限责任公司 The development of capacitance type potential transformer no-load voltage ratio, polarity test instrument
CN109031176A (en) * 2018-07-05 2018-12-18 中国人民解放军91388部队 A kind of Multifunction electricity source measurement standard method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108445280A (en) * 2018-03-13 2018-08-24 广东里田电力工业有限公司 A kind of voltmeter with fault cues
CN109031176A (en) * 2018-07-05 2018-12-18 中国人民解放军91388部队 A kind of Multifunction electricity source measurement standard method
CN108957380A (en) * 2018-07-25 2018-12-07 内蒙古送变电有限责任公司 The development of capacitance type potential transformer no-load voltage ratio, polarity test instrument

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