CN206362855U - A kind of residual voltage measuring capacitance in real time current tester - Google Patents

A kind of residual voltage measuring capacitance in real time current tester Download PDF

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Publication number
CN206362855U
CN206362855U CN201621227805.0U CN201621227805U CN206362855U CN 206362855 U CN206362855 U CN 206362855U CN 201621227805 U CN201621227805 U CN 201621227805U CN 206362855 U CN206362855 U CN 206362855U
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China
Prior art keywords
residual voltage
bandpass filter
module
current
voltage
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CN201621227805.0U
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Inventor
程元
刘占青
杨海涛
孙乾方
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BAODING LIXING ELECTRONIC EQUIPMENT Co Ltd
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BAODING LIXING ELECTRONIC EQUIPMENT Co Ltd
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Abstract

The utility model provides a kind of residual voltage measuring capacitance in real time current tester, a kind of residual voltage measuring capacitance in real time current tester, it is characterised in that including:Central processing controller, configuration analog-to-digital conversion module is changed to residual voltage signal;Accurate bandpass filter, voltage and current signal sampling module, the digital controllable inverter and boost module being connected with central processing controller, and, human-machine interface module;The accurate bandpass filter connection residual voltage Signal-regulated kinase;The accurate bandpass filter of the voltage and current signal sampling module connecting multi-channel;The residual voltage Signal-regulated kinase, accurate bandpass filter and voltage and current signal sampling module are always on.Individually residual voltage value is sampled by central processing controller, before testing at the scene power system capacitance current, the height of this apparatus measures residual voltage can be used directly in tester, and without other measuring instruments, this also brings great convenience to on-the-spot test.

Description

A kind of residual voltage measuring capacitance in real time current tester
Technical field
The utility model is related to high-voltage electric power system measuring equipment technical field, more specifically to a kind of zero sequence electricity Capacitive current tester is measured during compacting.
Background technology
With the developing rapidly of national economy, the continuous improvement of economic and technique level, society's electricity consumption amount is greatly improved;High pressure Transmission line of electricity is more and more, and distance is increasingly longer, and parasitic capacitance is also increasing over the ground for ultra-high-tension power transmission line.For power system The test process of capacitance current, a most important information is exactly the height of current power system residual voltage, the height of its value Directly react power system transmission line insulation against ground situation.
Conventional capacitance current tester, due to needing output and Operation of Electric Systems frequency (50Hz) in test process Different signal sources (less than 50Hz and the signal higher than 50Hz), and instrument internal can not accurately extract power system zero sequence electricity Press signal;Therefore it can not accurately measure power system residual voltage signal and show.
Utility model content
In view of this, the utility model provides a kind of residual voltage measuring capacitance in real time current tester, and it is right in real time to realize Residual voltage performs the technical purpose of measurement.
The utility model discloses a kind of residual voltage measuring capacitance in real time current tester, including:
Central processing controller, configuration analog-to-digital conversion module is changed to residual voltage signal;
It is the accurate bandpass filter that is connected with central processing controller, voltage and current signal sampling module, digital controllable Inverter and boost module, and, human-machine interface module;
The accurate bandpass filter connection residual voltage Signal-regulated kinase;
The accurate bandpass filter of the voltage and current signal sampling module connecting multi-channel;
The residual voltage Signal-regulated kinase, accurate bandpass filter and voltage and current signal sampling module are opened all the time Open.
Preferably, the human-machine interface module include button operation keyboard, LCD Panel, data-printing part and Storage dish.
Preferably, the digital controllable inverter and boost module include inverter controller, NMOS tube full-bridge And step-up transformer.
Preferably, in addition to:The built-in lithium battery management module being connected with the central processing controller.
Preferably, the built-in lithium battery management module lithium includes:Battery pack and intelligent power management system.
The accurate bandpass filter is the accurate bandpass filters of 50HZ.
Preferably, the multichannel precision bandpass filter includes the voltage channel and current channel being isolated from each other;
A 12Hz bandpass filters and a 180Hz bandpass filters are respectively included in the voltage channel and current channel.
Preferably, the voltage and current signal sampling module includes AD7606 synchronized samplings chip and peripheral cell.
It can be seen from above-mentioned technical scheme that, the residual voltage measuring capacitance in real time testing current that the utility model is related to Instrument, is individually sampled by central processing controller to residual voltage value, can be accurate in real time at any time by corresponding algorithm The residual voltage value of power system is measured, its measurement accuracy is improved, before testing at the scene power system capacitance current, surveyed The height of this apparatus measures residual voltage can be used directly in examination personnel, and without other measuring instruments, this also gives on-the-spot test band Great convenience is carried out.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of residual voltage measuring capacitance in real time current tester structural representation disclosed in the utility model embodiment Figure.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belongs to the scope of the utility model protection.
The utility model embodiment discloses a kind of residual voltage measuring capacitance in real time current tester, realizes a kind of Precision is high, operating efficiency is high, can operating in a key technical purpose.
Fig. 1 shows a kind of residual voltage measuring capacitance in real time current tester, including:
Central processing controller 1, configuration analog-to-digital conversion module is changed to residual voltage signal;
The central processing controller 1 individually carries out analog-to-digital conversion using built-in AD to residual voltage signal, its frequency of sampling Rate fundamental frequency is the common divisor of output signal source frequency in instrument, so as to can effectively prevent signal source output letter in FFT computings Number spectral leakage, greatly improve residual voltage signal sampling precision.
Residual voltage value is shown in liquid crystal display bottom state column all the time in actual mechanical process, and judges that this magnitude of voltage is It is no out-of-limit;Prompt messages are sent if out-of-limit, if in test process, being automatically stopped test process.
The accurate bandpass filter 2 that is connected with central processing controller 1, voltage and current signal sampling module 3, it is digital can Inverter and boost module 4 are controlled, and, human-machine interface module 5;
The connection residual voltage of accurate bandpass filter 2 Signal-regulated kinase 21;
The residual voltage Signal-regulated kinase, accurate bandpass filter and voltage and current signal sampling module are opened all the time Open;Be independently arranged, i.e., it is in running order all the time, realize measurement residual voltage value in real time.
The residual voltage signal of input is carried out LPF by the residual voltage Signal-regulated kinase 21, filters out major part Garbage signal, and the residual voltage signal amplitude of input is controlled in the range of 0~+3.3V, in order to which central processing unit 1 is to it Sampled.The voltage signal of output is inputted to the accurate bandpass filter module of 50Hz voltage signals.
50Hz voltage signals precision bandpass filter module filters out the signal of useless frequency band, and only retains 50Hz Frequency points Signal, and export to the single analog-to-digital conversion of central processing controller progress.
Residual voltage value is shown in liquid crystal display bottom state column all the time, and judges whether this magnitude of voltage is out-of-limit;Once it is out-of-limit Then send prompt messages, and controllable be then automatically stopped test process.
The accurate bandpass filter 31 of the connecting multi-channel of voltage and current signal sampling module 3;
Described 31 points of voltage channel, current channel two parts to be isolated from each other of multichannel precision bandpass filter.Voltage A 12Hz bandpass filter and a 180Hz bandpass filter are respectively included in passage and current channel.Capacitance current was tested Cheng Zhonghui exports the signal of two frequencies of 12Hz and 180Hz respectively, and above-mentioned bandpass filter can filter out the signal of useless frequency band And obtain useful signal.Set by channel separation, above-mentioned bandpass filter precision and stability is high, so as to be accurate measurement Capacitance current value lays a solid foundation.
The voltage and current signal sampling module 3 is made up of AD7606 synchronized samplings chip and peripheral cell, can be synchronous Sampling not only can guarantee that sampling precision but also can guarantee that the synchronized sampling of signal, that is, protected by voltage, the current signal of bandpass filter Obtained data phase accuracy is demonstrate,proved.
And, the built-in lithium battery management module 6 being connected with the central processing controller 1.
The built-in lithium battery management module 6 includes:Lithium battery group and intelligent power management system.
Digital controllable inverter and boost module 4 include inverter controller, NMOS tube full-bridge and boosting transformation Device.
The human-machine interface module 5 includes button operation keyboard, LCD Panel, data-printing part and storage Disk.
Described is that human-machine interface module 5 can realize extraction of the survey crew for test result.
In summary;
The residual voltage measuring capacitance in real time current tester that the utility model is related to, is filtered using independent 50Hz band logicals Ripple device, so as to filter out other invalid interference signals;And individually it is sampled by central processing controller, by calculating accordingly Method can accurately measure the residual voltage value of power system in real time at any time, and its measurement accuracy can reach 1%;Even in electric capacity electricity During flow measurement, accurately measurement can be also carried out in real time to residual voltage.Measure obtained power system residual voltage value real When be shown in the bottom state column of liquid crystal display, be easy to on-the-spot test personal observations.Also, when power system residual voltage value exceedes During given threshold, corresponding warning message can be sent;If in test process, then test process can be automatically stopped, concurrently Go out warning message.Before testing at the scene power system capacitance current, this apparatus measures zero sequence electricity can be used directly in tester The height of pressure, without other measuring instruments, this also brings great convenience to on-the-spot test.
The embodiment of each in this specification is described by the way of progressive, and what each embodiment was stressed is and other Between the difference of embodiment, each embodiment identical similar portion mutually referring to.To the upper of the disclosed embodiments State bright, professional and technical personnel in the field is realized or use the utility model.A variety of modifications pair to these embodiments It will be apparent for those skilled in the art, generic principles defined herein can not depart from this reality In the case of with new spirit or scope, realize in other embodiments.Therefore, the utility model is not intended to be limited to this These embodiments shown in text, and it is to fit to the most wide scope consistent with features of novelty with principles disclosed herein.

Claims (8)

1. a kind of residual voltage measuring capacitance in real time current tester, it is characterised in that including:
Central processing controller, configuration analog-to-digital conversion module is changed to residual voltage signal;
The accurate bandpass filter that is connected with central processing controller, voltage and current signal sampling module, digital controllable inversion Power supply and boost module, and, human-machine interface module;
The accurate bandpass filter connection residual voltage Signal-regulated kinase;
The accurate bandpass filter of the voltage and current signal sampling module connecting multi-channel;
The residual voltage Signal-regulated kinase, accurate bandpass filter and voltage and current signal sampling module are always on.
2. residual voltage measuring capacitance in real time current tester as claimed in claim 1, it is characterised in that the man-machine interface Module includes button operation keyboard, LCD Panel, data-printing part and storage dish.
3. residual voltage measuring capacitance in real time current tester as claimed in claim 1, it is characterised in that it is described it is digital can Controlling inverter and boost module includes inverter controller, NMOS tube full-bridge and step-up transformer.
4. residual voltage measuring capacitance in real time current tester as claimed in claim 1, in addition to:Controlled with the center processing The built-in lithium battery management module of device connection processed.
5. residual voltage measuring capacitance in real time current tester as claimed in claim 4, it is characterised in that the built-in lithium electricity Pond management module includes:Lithium battery group and intelligent power management system.
6. Capacitive current tester as claimed in claim 1, it is characterised in that the accurate bandpass filter is 50HZ accurate Bandpass filter.
7. Capacitive current tester as claimed in claim 1, it is characterised in that the multichannel precision bandpass filter includes The voltage channel and current channel being isolated from each other;
A 12Hz bandpass filters and a 180Hz bandpass filters are respectively included in the voltage channel and current channel.
8. Capacitive current tester as claimed in claim 1, it is characterised in that the voltage and current signal sampling module includes AD7606 synchronized samplings chip and peripheral cell.
CN201621227805.0U 2016-11-15 2016-11-15 A kind of residual voltage measuring capacitance in real time current tester Active CN206362855U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621227805.0U CN206362855U (en) 2016-11-15 2016-11-15 A kind of residual voltage measuring capacitance in real time current tester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621227805.0U CN206362855U (en) 2016-11-15 2016-11-15 A kind of residual voltage measuring capacitance in real time current tester

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Publication Number Publication Date
CN206362855U true CN206362855U (en) 2017-07-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108982960A (en) * 2018-08-13 2018-12-11 西安科技大学 A kind of capacitance current of distribution network measurement method and device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108982960A (en) * 2018-08-13 2018-12-11 西安科技大学 A kind of capacitance current of distribution network measurement method and device

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