CN204065400U - High-voltage electric energy meter on-site calibrator - Google Patents

High-voltage electric energy meter on-site calibrator Download PDF

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Publication number
CN204065400U
CN204065400U CN201420584191.6U CN201420584191U CN204065400U CN 204065400 U CN204065400 U CN 204065400U CN 201420584191 U CN201420584191 U CN 201420584191U CN 204065400 U CN204065400 U CN 204065400U
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CN
China
Prior art keywords
phase
voltage
sensor
module
caliper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201420584191.6U
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Chinese (zh)
Inventor
冯凌
周全
李林霞
宫林
朱英
杨慧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electric Power Research Institute of State Grid Chongqing Electric Power Co Ltd
State Grid Corp of China SGCC
Original Assignee
Electric Power Research Institute of State Grid Chongqing Electric Power Co Ltd
State Grid Corp of China SGCC
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Filing date
Publication date
Application filed by Electric Power Research Institute of State Grid Chongqing Electric Power Co Ltd, State Grid Corp of China SGCC filed Critical Electric Power Research Institute of State Grid Chongqing Electric Power Co Ltd
Priority to CN201420584191.6U priority Critical patent/CN204065400U/en
Application granted granted Critical
Publication of CN204065400U publication Critical patent/CN204065400U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of high-voltage electric energy meter on-site calibrator, comprise verification main frame, also comprise phase-splitting processing module, comprise described phase-splitting processing module and comprise the phase-splitting processing unit of synchronized sampling and the sensor for gathering electric current, voltage signal are carried out to the voltage signal received and current signal; The voltage signal that described phase-splitting processing unit receives voltage sensor and current sensor and current signal carry out synchronized sampling, and sample information is transferred to verification main frame by communication module.The utility model is when carrying out Watt-hour meter's field test, on high-tension side data acquisition is completed by phase-splitting processing module, without the need to having a power failure, and without the need to electric energy meter, mutual inductor and secondary circuit thereof subitem School Affairs is detected, online overall verification can be carried out to the operating 10kV electric power meter in scene, and the Real-time Error of verification is shown.Because verification main frame is in low-pressure side, not entail dangers to personal safety.

Description

High-voltage electric energy meter on-site calibrator
Technical field
The utility model relates to a kind of on-line testing instrument of high-voltage electric-energy meter, and for calibrating the error of high-voltage electric-energy meter, protection supplies, the economic interests of electricity consumption both sides.
Background technology
The core that electric energy metrical is runed as electric power enterprise, makes the data of power consumption gather and record by electric power meter to user, obtains the data of carrying out electricity clearing.And the accuracy of electric power meter metering, directly have influence on the economic interests of confession, electricity consumption both sides.Therefore, power supply enterprise has generally carried out the cycle field-checking to electric power meter error in dipping.
According to statistics, China's high-voltage electric-energy meter amount total is more than 4,000,000 (cover), and wherein 6 ~ 35kV electric pressure accounts for more than 90%.Adopt the measuring apparatus field-checking of subitem method of calibration must verify electric energy meter, transformer error and test secondary circuit voltage respectively to fall, test procedure is many, and work on the spot intensity is large.Especially the error checking of mutual inductor must be carried out under power down mode, greatly disturbs the normal electricity consumption of user; Power failure application formality is many, the time long, site safety measure is complicated, there is higher management and potential safety hazard, also can have influence on the business indicator of power supply enterprise, so be difficult to obtain the support for electricity consumption both sides.Therefore, convenient, efficient field-checking technology must be studied, under no cut-off condition, entirety verification can be carried out to 6 ~ 35kV electric power meter.
At present, the new technology being applied to the new electric energy measuring apparatus in power distribution network emerges in an endless stream.Wherein, a kind ofly adopt the high-voltage electric energy meter of sensor type to obtain on electricity market to apply comparatively widely.This kind of measuring apparatus generally adopts the sensors such as weak output current voltage transformer (VT), air core coil, resitstance voltage divider, capacitive divider and telefault, directly gathers, processes and conversion high voltage side current, voltage signal; Over all Integration degree is high, cannot distinguish mutual inductor and electric energy meter; Be directly installed on high-pressure side after sensor, signal processing unit and computation chip are integrated, by optical fiber, cable data line or wireless data transceiving unit etc., information about power be transferred to low-pressure side; Volume is little, cost is low, anti-electricity-theft performance is splendid, can save ample resources and the energy, meets the industry policy of country, has powerful vitality.To this type of measuring apparatus, tradition subitem method of calibration cannot be adopted, only have and could solve field-checking problem by entirety verification.
At present, have technical body to carry out research work to a certain degree for high-voltage electric-energy meter on-line testing technology abroad, but its concrete practical application have no report.Domestic enterprise and scientific research institutions generally only develop single on-line testing product for mutual inductor, electric energy meter or secondary circuit, but the composition error on-line testing technology of whole electric power meter and product yet there are no report.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of high-voltage electric energy meter on-site calibrator, for calibrating the error of high-voltage electric-energy meter.
The purpose of this utility model is realized by such technical scheme, a kind of high-voltage electric energy meter on-site calibrator, comprise verification main frame, also comprise phase-splitting processing module, comprise described phase-splitting processing module and comprise the phase-splitting processing unit of synchronized sampling and the sensor for gathering electric current, voltage signal are carried out to the voltage signal received and current signal; The voltage signal that described phase-splitting processing unit receives voltage sensor and current sensor and current signal carry out synchronized sampling, and sample information is transferred to verification main frame by communication module; Described phase-splitting processing unit comprises digital signal processor DSP, A/D module, D/A module, Phase-Locked Synchronous generator, the output terminal of described Phase-Locked Synchronous generator is connected with the control end of A/D module, D/A module respectively, the described input end of Phase-Locked Synchronous generator is connected with the output terminal of sensor, and the output terminal of described A/D module, the output terminal of D/A module are connected with digital signal processor DSP respectively.
Further, described verification main frame comprises central processing unit ARM, pulse processing unit and man-machine interaction unit, and described CPU (central processing unit) ARM is connected with digital signal processor DSP, pulse processing unit and man-machine interaction unit respectively.
Further, described sensor comprises voltage sensor and current sensor, and described current sensor is clamp on amperemeter, and described voltage sensor is derided capacitors.
Further, described clamp on amperemeter comprises left caliper 2 and right caliper body 1, the face area of described left caliper jaw and the face area of right caliper body jaw different, make left caliper and right caliper body when closed, the jaw end face always keeping left caliper is completely and the jaw end contact of right caliper body.
Owing to have employed technique scheme, the utility model has following advantage:
Without the need to electric energy meter, mutual inductor and secondary circuit thereof subitem School Affairs is detected, without the need to having a power failure, online overall verification being carried out to the operating 10kV electric power meter in scene, and the Real-time Error of verification is shown by display.
Accompanying drawing explanation
In order to make the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model is described in further detail, wherein:
Fig. 1 is the structure principle chart of high-voltage electric energy meter on-site calibrator;
Fig. 2 is clamp on amperemeter structural drawing;
Fig. 3 is core section schematic diagram.
Embodiment
Below with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail; Should be appreciated that preferred embodiment only in order to the utility model is described, instead of in order to limit protection domain of the present utility model.
As shown in Figure 1, a kind of high-voltage electric energy meter on-site calibrator, comprise verification main frame, also comprise phase-splitting processing module, comprise described phase-splitting processing module and comprise the phase-splitting processing unit of synchronized sampling and the sensor for gathering electric current, voltage signal are carried out to the voltage signal received and current signal; The voltage signal that described phase-splitting processing unit receives voltage sensor and current sensor and current signal carry out synchronized sampling, and sample information is transferred to verification main frame by communication module; Described phase-splitting processing unit comprises digital signal processor DSP, A/D module, D/A module, Phase-Locked Synchronous generator, the output terminal of described Phase-Locked Synchronous generator is connected with the control end of A/D module, D/A module respectively, the described input end of Phase-Locked Synchronous generator is connected with the output terminal of sensor, and the output terminal of described A/D module, the output terminal of D/A module are connected with digital signal processor DSP respectively.
Described verification main frame comprises central processing unit ARM, pulse processing unit and man-machine interaction unit, and described CPU (central processing unit) ARM is connected with digital signal processor DSP, pulse processing unit and man-machine interaction unit respectively; Described sensor comprises voltage sensor and current sensor, and described current sensor is clamp on amperemeter, and described voltage sensor is derided capacitors.
When using the utility model to carry out Watt-hour meter's field test, high-pressure side sampling phase-splitting processing module completes, the voltage and current that phase-splitting processing unit receives every phase by voltage sensor and current sensor carries out data processing, can directly adopt synchronized sampling scheme like this, to avoid the error of calculation.Phase-splitting processing module is being carried out data processings such as voltage, electric current, power and electric energy add up always, and waits for the data calling of main frame.Verification main frame receives and processes the output electrical energy pulse of tested device, is scaled the electric flux that tested device is measured.
Described phase-splitting processing module adopts three-phase monoblock type or single-phase split type.On material, there is enough dielectric strengths, directly overlap/be serially connected under live state on the high pressure three-phase line at tested electric power meter place.
The utility model is when carrying out Watt-hour meter's field test, on high-tension side data acquisition is completed by phase-splitting processing module, without the need to having a power failure, and without the need to electric energy meter, mutual inductor and secondary circuit thereof subitem School Affairs is detected, online overall verification can be carried out to the operating 10kV electric power meter in scene, and the Real-time Error of verification is shown by man-machine interaction unit.Because verification main frame is in low-pressure side, not entail dangers to personal safety.
As shown in Figure 2,3, described clamp on amperemeter comprises left caliper 2 and right caliper body 1, the face area of described left caliper jaw and the face area of right caliper body jaw different, make left caliper and right caliper body when closed, the jaw end face always keeping left caliper completely and the jaw end contact of right caliper body.
In the present embodiment, two surface of contact of the iron core of reometer small one and large one, can ensure that contact area when split-core type meter closes is always identical like this, thus avoid the magnetic flux error caused due to iron core surface of contact deviation.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.

Claims (4)

1. a high-voltage electric energy meter on-site calibrator, comprise verification main frame, it is characterized in that: also comprise phase-splitting processing module, comprise described phase-splitting processing module and comprise the phase-splitting processing unit of synchronized sampling and the sensor for gathering electric current, voltage signal are carried out to the voltage signal received and current signal; The voltage signal that described phase-splitting processing unit receives voltage sensor and current sensor and current signal carry out synchronized sampling, and sample information is transferred to verification main frame by communication module; Described phase-splitting processing unit comprises digital signal processor DSP, A/D module, D/A module, Phase-Locked Synchronous generator, the output terminal of described Phase-Locked Synchronous generator is connected with the control end of A/D module, D/A module respectively, the described input end of Phase-Locked Synchronous generator is connected with the output terminal of sensor, and the output terminal of described A/D module, the output terminal of D/A module are connected with digital signal processor DSP respectively.
2. high-voltage electric energy meter on-site calibrator according to claim 1, it is characterized in that: described verification main frame comprises central processing unit ARM, pulse processing unit and man-machine interaction unit, and described CPU (central processing unit) ARM is connected with digital signal processor DSP, pulse processing unit and man-machine interaction unit respectively.
3. high-voltage electric energy meter on-site calibrator according to claim 1 and 2, it is characterized in that: described sensor comprises voltage sensor and current sensor, described current sensor is clamp on amperemeter, described voltage sensor is derided capacitors.
4. high-voltage electric energy meter on-site calibrator according to claim 3, it is characterized in that: described clamp on amperemeter comprises left caliper (2) and right caliper body (1), the face area of described left caliper jaw and the face area of right caliper body jaw different, make left caliper and right caliper body when closed, the jaw end face always keeping left caliper completely and the jaw end contact of right caliper body.
CN201420584191.6U 2014-10-10 2014-10-10 High-voltage electric energy meter on-site calibrator Expired - Fee Related CN204065400U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420584191.6U CN204065400U (en) 2014-10-10 2014-10-10 High-voltage electric energy meter on-site calibrator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420584191.6U CN204065400U (en) 2014-10-10 2014-10-10 High-voltage electric energy meter on-site calibrator

Publications (1)

Publication Number Publication Date
CN204065400U true CN204065400U (en) 2014-12-31

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Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105223536A (en) * 2015-10-14 2016-01-06 国家电网公司 A kind of portable electric meter field calibration system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105223536A (en) * 2015-10-14 2016-01-06 国家电网公司 A kind of portable electric meter field calibration system

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C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20141231

Termination date: 20201010

CF01 Termination of patent right due to non-payment of annual fee