CN201773140U - Alternating current and direct current hybrid electric field intensity measuring device - Google Patents

Alternating current and direct current hybrid electric field intensity measuring device Download PDF

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Publication number
CN201773140U
CN201773140U CN2009202468650U CN200920246865U CN201773140U CN 201773140 U CN201773140 U CN 201773140U CN 2009202468650 U CN2009202468650 U CN 2009202468650U CN 200920246865 U CN200920246865 U CN 200920246865U CN 201773140 U CN201773140 U CN 201773140U
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China
Prior art keywords
electric field
pass filter
direct current
alternating current
data acquisition
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Expired - Lifetime
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CN2009202468650U
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Chinese (zh)
Inventor
陆家榆
秦松林
杨勇
鞠勇
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China Electric Power Research Institute Co Ltd CEPRI
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China Electric Power Research Institute Co Ltd CEPRI
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Priority to CN2009202468650U priority Critical patent/CN201773140U/en
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Abstract

The utility model relates to an alternating current and direct current hybrid electric field intensity measuring device comprising an electric field sensor, a low pass filter, a high pass filter, an average circuit, an alternating current effective value conversion circuit, a gain adjustment circuit, a data acquisition system and a computer measurement system, wherein the electric field sensor inputs an acquired voltage signal to the low pass filter, which then outputs the voltage signal by two ways; one way of signal is input to the average circuit to input the obtained direct current electric field value into the data acquisition system; and after input to the high pass filter, the other way of signal sequentially passes through the alternating current effective value conversion circuit and the gain adjustment circuit that are connected in series to obtain power frequency electric field effective value, which is input to the data acquisition system and the computer measurement system. By adopting a rotary voltmeter electric field sensor, the high and the low pass filter and the average circuit and inputting the processed signal to the data acquisition system, the device realizes the performance of simultaneously measuring the intensity of alternating current and direct current electric fields, and can be widely applied in power transmission systems for measuring the intensity of various alternating current and direct current hybrid electric fields.

Description

A kind of alternating current-direct current mixing electric field intensity measuremenrt device
Technical field
The utility model relates to a kind of electric field intensity measuremenrt device, particularly about a kind of be used to measure close on the alternating current-direct current that the high-voltage AC transmission circuit that sets up and HVDC (High Voltage Direct Current) transmission line produce and mix the measurement mechanism of electric field intensity.
Background technology
Because the development of electrical power transmission system, there are increasing high-voltage AC transmission circuit and HVDC (High Voltage Direct Current) transmission line to be in the adjacent position, the following phenomenon that also has high-voltage AC transmission circuit and HVDC (High Voltage Direct Current) transmission line to set up even also have wiring on the same tower with the corridor.Electric field under above-mentioned these situation transmission lines of electricity is a kind of AC field and the electric field that mixes of DC electric field, measures the alternating current-direct current mixing electric field that produces under high-voltage AC transmission circuit and the situations such as the same corridor of HVDC (High Voltage Direct Current) transmission line, wiring on the same tower and can be used for this kind situation line electricity magnetic environment is studied and estimated.But, also there is not corresponding measurement mechanism directly to measure at present to alternating current-direct current mixing electric field, when can't realizing ac electric field strength and DC electric field intensity, measures by promptly existing measuring equipment.The shortcoming of above-described existing electric field measurement device is badly in need of improving.
Summary of the invention
At the problems referred to above, the purpose of this utility model provides a kind of both energy measurements DC electric field intensity, the alternating current-direct current mixing electric field intensity measuremenrt method and the device thereof of energy measurement ac electric field strength again.
For achieving the above object, the utility model is taked following technical scheme: a kind of alternating current-direct current mixing electric field intensity measuremenrt device is characterized in that: it comprises an electric-field sensor, a low-pass filter, a Hi-pass filter, an averaging circuit, an AC value translation circuit, a gain adjustment circuit, a data acquisition system (DAS) and a computer measurement system; Described electric-field sensor divides two-way output after the voltage signal of gathering is imported described low-pass filter, after wherein one road voltage signal is imported described averaging circuit, the DC electric field value that obtains is imported described data acquisition system (DAS); After another road voltage signal is imported described Hi-pass filter, successively behind the described AC value translation circuit and gain adjustment circuit through being connected in series, the power frequency electric field effective value that obtains is imported described data acquisition system (DAS), and described data acquisition system (DAS) will collect data and import in the described computer measurement system.
Described electric-field sensor adopts the rotary voltmeter electric-field sensor, utilizes induced current method that alternating current-direct current mixing electric field is measured.
The cutoff frequency of described low-pass filter is 150~200Hz.
The utility model is owing to take above technical scheme, it has the following advantages: 1, the utility model is owing to adopted the rotary voltmeter electric-field sensor, behind low-pass filter, import the voltage signal of detected alternating current-direct current mixing electric field in Hi-pass filter and the averaging circuit respectively, d. c. voltage signal input data acquisition system (DAS) after the averaging circuit conversion, through Hi-pass filter, alternating voltage effective value after AC value translation circuit and the gain adjustment circuit conversion process is also imported data acquisition system (DAS), therefore both energy measurement DC electric field intensity of the utility model, the performance of energy measurement ac electric field strength have again been realized.2, the utility model since the cutoff frequency that adopts low-pass filter between 150~200Hz, modulating frequency in like this can filtering alternating current-direct current blended voltage signals, therefore obtained mixing relevant interchange, the direct current blended voltage signals of electric field intensity, and then can separate DC component and AC compounent in the blended voltage signals effectively with alternating current-direct current.3, the utility model is owing to adopt DC component and AC compounent with the alternating current-direct current blended voltage signals all to be converted to DC voltage, like this can be so that data acquisition system (DAS) collects the voltage data after the conversion easily, and then in the input computer measurement system, realized that therefore alternating current-direct current mixes the computer automatic measuring system of electric field intensity.The utility model can be widely used in the various alternating current-direct current mixing electric field intensity measuremenrts of electrical power transmission system.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present utility model.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in detail.
As shown in Figure 1, alternating current-direct current mixing electric field intensity measuremenrt device of the present utility model comprises an electric-field sensor 1, a low-pass filter 2, an averaging circuit 3, a data acquisition system (DAS) 4, a Hi-pass filter 5, an AC value translation circuit 6, a gain adjustment circuit 7 and a computer measurement system 8.Electric-field sensor 1 is gathered the voltage signal of tested place's alternating current-direct current mixing electric field, and with in this voltage signal input low-pass filter 2, the modulating frequency in the filtering voltage signal obtains dividing two-way output after the direct current power frequency blended voltage signals.Wherein behind one road direct current power frequency blended voltage signals input averaging circuit 3, export a DC voltage, this DC voltage can directly be scaled the DC electric field value and import data acquisition system (DAS) 4; Behind another road direct current power frequency blended voltage signals input Hi-pass filter 5, blended voltage signals is converted to only contains power frequency component, and input AC effective value translation circuit 6 is converted to DC voltage with power frequency component, input gain is adjusted circuit 7 again, by the adjustment that gains of 7 pairs of d. c. voltage signals of gain adjustment circuit, this DC voltage can be scaled the effective value of power frequency electric field, imports data acquisition system (DAS) 4 then.In all data input computer measurement systems 8 that data acquisition system (DAS) 4 will collect, store and analyze.
In the foregoing description, the DC component of direct current power frequency blended voltage signals is relevant with the DC electric field at tested place, and its AC compounent is relevant with the power frequency electric field at tested place; The effective value of DC electric field value and power frequency electric field is represented tested place DC electric field and AC field effective value respectively.
In the foregoing description, the electric-field sensor 1 that the utility model adopts is the rotary voltmeter electric-field sensor, utilizes induced current method that alternating current-direct current mixing electric field is measured.
In the foregoing description, the cutoff frequency that low-pass filter 2 adopts is 150~200Hz, therefore when electric-field sensor 1 collect mix electric field voltage signal behind low-pass filter 2, can obtain the voltage signal of an interchange, direct current mixing.
In the foregoing description; the structure of each parts, the position is set and connects and all can change to some extent; on all bases,, should not get rid of outside protection domain of the present utility model improvement and the equivalents that individual component is carried out based on technical solutions of the utility model.

Claims (3)

1. alternating current-direct current mixing electric field intensity measuremenrt device, it is characterized in that: it comprises an electric-field sensor, a low-pass filter, a Hi-pass filter, an averaging circuit, an AC value translation circuit, a gain adjustment circuit, a data acquisition system (DAS) and a computer measurement system; Described electric-field sensor divides two-way output after the voltage signal of gathering is imported described low-pass filter, after wherein one road voltage signal is imported described averaging circuit, the DC electric field value that obtains is imported described data acquisition system (DAS); After another road voltage signal is imported described Hi-pass filter, successively behind the described AC value translation circuit and gain adjustment circuit through being connected in series, the power frequency electric field effective value that obtains is imported described data acquisition system (DAS), and described data acquisition system (DAS) will collect data and import in the described computer measurement system.
2. a kind of alternating current-direct current mixing electric field intensity measuremenrt device as claimed in claim 1 is characterized in that: described electric-field sensor adopts the rotary voltmeter electric-field sensor.
3. a kind of alternating current-direct current mixing electric field intensity measuremenrt device as claimed in claim 1, it is characterized in that: the cutoff frequency of described low-pass filter is 150~200Hz.
CN2009202468650U 2009-11-12 2009-11-12 Alternating current and direct current hybrid electric field intensity measuring device Expired - Lifetime CN201773140U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009202468650U CN201773140U (en) 2009-11-12 2009-11-12 Alternating current and direct current hybrid electric field intensity measuring device

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Application Number Priority Date Filing Date Title
CN2009202468650U CN201773140U (en) 2009-11-12 2009-11-12 Alternating current and direct current hybrid electric field intensity measuring device

Publications (1)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102955061A (en) * 2011-08-22 2013-03-06 中国石油集团长城钻探工程有限公司 Multi-frequency alternating-current signal measuring method
CN103472769A (en) * 2013-06-28 2013-12-25 国家电网公司 Data acquisition system and monitoring system for direct-current electric field monitoring
CN103954848A (en) * 2014-04-21 2014-07-30 国家电网公司 Portable field strength measurement device and field strength measurement method based on DSP and FPGA
CN112607729A (en) * 2020-12-23 2021-04-06 中钢集团南京新材料研究院有限公司 Device for stripping graphene by using alternating electric field and using method thereof
CN113311214A (en) * 2021-05-21 2021-08-27 山东中实易通集团有限公司 Non-contact alternating current-direct current suspension conductor potential measurement system and method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102955061A (en) * 2011-08-22 2013-03-06 中国石油集团长城钻探工程有限公司 Multi-frequency alternating-current signal measuring method
CN103472769A (en) * 2013-06-28 2013-12-25 国家电网公司 Data acquisition system and monitoring system for direct-current electric field monitoring
CN103954848A (en) * 2014-04-21 2014-07-30 国家电网公司 Portable field strength measurement device and field strength measurement method based on DSP and FPGA
CN103954848B (en) * 2014-04-21 2015-12-30 国家电网公司 Based on portable field intensity measurement mechanism and the method for DSP and FPGA
CN112607729A (en) * 2020-12-23 2021-04-06 中钢集团南京新材料研究院有限公司 Device for stripping graphene by using alternating electric field and using method thereof
CN113311214A (en) * 2021-05-21 2021-08-27 山东中实易通集团有限公司 Non-contact alternating current-direct current suspension conductor potential measurement system and method

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Granted publication date: 20110323