CN202631727U - Onsite detector of electric energy metering device - Google Patents

Onsite detector of electric energy metering device Download PDF

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Publication number
CN202631727U
CN202631727U CN 201220308076 CN201220308076U CN202631727U CN 202631727 U CN202631727 U CN 202631727U CN 201220308076 CN201220308076 CN 201220308076 CN 201220308076 U CN201220308076 U CN 201220308076U CN 202631727 U CN202631727 U CN 202631727U
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CN
China
Prior art keywords
electric energy
module
circuit
computation chip
circuit electric
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Application number
CN 201220308076
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Chinese (zh)
Inventor
徐斌
古雄文
刘岩
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珠海派诺科技股份有限公司
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Priority to CN 201220308076 priority Critical patent/CN202631727U/en
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Publication of CN202631727U publication Critical patent/CN202631727U/en

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Abstract

Provided is an onsite detector of an electric energy metering device. A primary circuit current sampling input module is connected with a first secondary circuit electric energy metering chip. A secondary circuit current sampling input module and an internal current transformer are connected with the first secondary circuit electric energy metering chip through relays. A phase sampling input module is respectively connected with the first secondary circuit electric energy metering chip and a second secondary circuit electric energy metering chip. The first secondary circuit electric energy metering chip and the second secondary circuit electric energy metering chip are both connected with a pulse signal reshaping module, and a photoelectric sampler is connected with the pulse signal reshaping module through an inverter. The first secondary circuit electric energy metering chip, the second secondary circuit electric energy metering chip and the pulse signal reshaping module are all connected with a controller. In addition, a liquid crystal display module, a 4X4 matrix keyboard, a printer, a storage module and a clock module are connected with the controller. The onsite detector brings convenience to periodic detection of the electric energy metering device in operation.

Description

The electric power metering device in-situs tester

Technical field

The utility model relates to a kind of in-situs tester, relates in particular to a kind of electric power metering device in-situs tester.

Background technology

Electric energy metrical is the safety assurance of the normal operation of electric system, and electric energy meter is as measuring generator electricity ability or load in a certain period, and it uses the every field that has been penetrated into national economy.Press structural principle and divide, electric energy meter is divided into induction type and electronic type two big classes.Wherein electronic electric energy meter further can be divided into full electronic electric energy meter and mechanical-electronic pulse formula electric energy meter.It is voltage, electric current, phase transition magnetic torque that induction type electric energy meter adopts the principle of electromagnetic induction, promotes aluminium disks and rotates, and the drum that the axle of net dish (worm screw) driven gear drives register rotates, and rotating process promptly is the process of accumulating round the clock the time.Although all kinds of electric energy meter functions have nothing in common with each other, the ultimate principle of its electric energy metrical is the same.Electric energy metrical is through to the measuring of active power, and the instantaneous power in the load equals the instantaneous voltage stream and the product that flows through the momentary current of load at load two ends.

All kinds of electric power metering devices must experimentize according to the relevant detection regulation before installing and using, and the chamber is first to be examined, but in actual field was used, only WT-MSR itself accurately might not finally guarantee the accurate of electric-power metering.In actual moving process, owing to reasons such as excessive, wiring error fall in unreasonable, the change of the method for operation, the voltage transformer secondary loop voltage of metering method, can cause error in dipping excessive, electric quantity loss is serious.In-situs tester can check more directly perceived, easy, promptly and judge whether the alternating electromotive force WT-MSR is operated in normal condition; In case find that AC energy meter is overproof; Can in time change, thereby use electric unit in the measurement and calibration process, to avoid the puzzlement that has a power failure and brought.

In the past; When if desired the AC energy meter that is using being examined and determine or calibrating, pull down these AC energy meters after must whole or part electricity consumption district being had a power failure, be sent to the department of legal measurement and calibration again; Complex operation so not only, and can cause the certain economic loss.

The utility model content

The purpose of the utility model is to provide a kind of electric power metering device in-situs tester, and wherein, primary circuit current sample load module is connected with first secondary circuit electric energy computation chip; Secondary loop current sampling load module and built-in current mutual inductor are connected with first secondary circuit electric energy computation chip through relay; Phase voltage sampling load module is connected with first secondary circuit electric energy computation chip and second secondary circuit electric energy computation chip respectively; First secondary circuit electric energy computation chip all is connected with the pulse signal Shaping Module with second secondary circuit electric energy computation chip, and photoelectric sampler also is connected with the pulse signal Shaping Module through reverser; First secondary circuit electric energy computation chip, second secondary circuit electric energy computation chip, and the pulse signal Shaping Module all be connected with controller; In addition, LCD MODULE, 4X4 matrix keyboard, printer, memory module and clock module also all are connected with controller; The AD/DC switch power module provides electric energy for the DC/DC power module, and the DC/DC power module then provides electric energy for whole detector.

Controller preferably adopts single-chip microcomputer MSP430F149.First secondary circuit electric energy computation chip, second secondary circuit electric energy computation chip all preferably adopt electric energy computation chip ADE7753.

The application of electric energy meter field detection technique, for the operating electric energy meter of periodic verification provides convenience, particularly some living quarterss are with table; Quantity is big; Problems such as the ubiquity circuit is many, assorted, aging again, and reason such as metering casing installation and design is improper, can't dismounting or dismounting numerous and diverse; The damage ammeter causes damage easily, also is unfavorable for detecting the calibration circle.Rationally and scientifically use on-the-spot detection technique; Economic loss is avoided in loaded down with trivial details operating process before can exempting, and can save time, obtain efficiently simultaneously just continuous data; Be used to identify electric energy meter, prevent because nature or human factor cause waste of power resources.

Description of drawings

Fig. 1 is an electric power metering device in-situs tester overall system composition frame chart.

Embodiment

Fig. 1 is an electric power metering device in-situs tester overall system composition frame chart, and primary circuit current sample load module 1 is connected with first secondary circuit electric energy computation chip 5; Secondary loop current sampling load module 2 and built-in current mutual inductor 3 are connected with first secondary circuit electric energy computation chip 5 through relay 4; Phase voltage sampling load module 10 is connected with first secondary circuit electric energy computation chip 5 and second secondary circuit electric energy computation chip 9 respectively; First secondary circuit electric energy computation chip 5 all is connected with pulse signal Shaping Module 8 with second secondary circuit electric energy computation chip 9, and photoelectric sampler 6 also is connected with pulse signal Shaping Module 8 through reverser 7; First secondary circuit electric energy computation chip 5, second secondary circuit electric energy computation chip 9, and pulse signal Shaping Module 8 all be connected with controller 11; In addition, LCD MODULE 12,4X4 matrix keyboard 13, printer 14, memory module 15 and clock module 16 also all are connected with controller 11; AD/DC switch power module 17 provides electric energy for DC/DC power module 18, and 18 of DC/DC power modules provide electric energy for whole detector.

The controller 11 preferred single-chip microcomputer MSP430F149 that adopt.MSP43O is one type of single-chip microcomputer with band FLASH of 16 buses of Dezhou company exploitation.Also can adopt the single-chip microcomputer MC9S12H128 of Freescale company.

First secondary circuit electric energy computation chip 5, second secondary circuit electric energy computation chip 9 all preferably adopt electric energy computation chip ADE7753.ADE7753 is the advanced digital kilowatt-hour meter chip of a up-to-date function of ADI company, and this is a kind of meritorious integrated circuit that measures with apparent energy of high precision with serial line interface and pulse output.

This electric power metering device in-situs tester is core with MSP430F149, adopt 2 electric energy computation chip ADE7753 simultaneously to once, the input of the electric current and voltage of secondary circuit measures.Adopt photoelectric sampler to introduce the electric energy meter pulse signal, sampling pulse signal and ADE7753 output pulse are carried out shaping, send single-chip microcomputer then to and carry out data relatively through the shaping pulse module; Relay is realized once, the switching of secondary loop current sampling input; ADE7753 realizes sampling input, power calculation and the pulse output of voltage and current signal; Single-chip microcomputer MSP43OF149 realizes integral control function, comprises that input and output, signal compare or the like; Power module is the total system power supply; Clock module is realized data recording function.

Principle of work is, at first should with current clamp be clipped in respectively tested load once, the secondary current loop.According to the restriction of the difference and the measurement environment condition of tested electric energy meter, optionally take from flowing mode and manual mode detects.

Under automatic detection mode, be that mechanical type then can be buckled on the ammeter through photoelectric sampler like electric energy meter, photoelectricity is aimed at watt-hour meter dial, transfer to normal sampling, what at this moment import detector is the pulse of photoelectric sampler; Like tested electric energy meter is electronic type, can directly its pulse output be connected to detector.Then, press " automatically " key, behind the preset parameters such as input table constant, tested mutual inductor ratio, the verification number of turns, just can implement automatic gauge and detect from keyboard.Under manual detection mode, the same with automated manner, after carefully connecting the wire, preset parameter.Pulse is manually pressed the input of " manually " key by the people.Because manually reach the collimation error, the number of turns is multiple spot suitably.When the rotating disk colour code went to the dead ahead, speed clicked hand switch, promptly began to detect; When table to be detected changes enough number of turns that is provided with, click hand switch again, can show this directional error.

The design's outstanding advantage be adopt 2 electric energy computation chip ADE7753 simultaneously to once, the electric current and voltage input of secondary circuit measures.Because many HPF link and digital integrator links in the ADE7753 current channel, the current channel output data is more stable than voltage channel.Therefore, when the primary circuit is measured, voltage signal is added in the voltage channel of l ADE7753, and the voltage signal of secondary circuit is added in the current channel of the 2nd ADE7753.In fact because once, the voltage of secondary circuit all is phase voltage 22OV, the output valve of getting the 2nd ADE7753 current channel like this can be more accurate as the measured value of phase voltage.This is highly significant to improving the whole accuracy class of instrument.

This device can not have a power failure, not change under the situation of measurement loop wiring, the error of the online composition error of measuring single-phase batch meter and electric energy meter, mutual inductor, and print result.And then judge that the opening circuit of loop, short circuit, loose contact, CT polarity connect instead, CT changes and nameplate such as is not inconsistent at metering fault, be that electric administrative department is looked into stealing, looks into fault, remedied the useful tool of the electricity charge.This device is through the online input current of large and small current clamp, voltage signal; According to actual electrical expression condition, select photoelectric sampler to introduce pulse signal, by a keyboard entry operation; Carry out related command, comprise parameter input, measurement, data preservation, print, inquire about or the like.

Claims (3)

1. an electric power metering device in-situs tester is characterized in that, primary circuit current sample load module (1) is connected with first secondary circuit electric energy computation chip (5); Secondary loop current sampling load module (2) and built-in current mutual inductor (3) all pass through relay (4) and are connected with first secondary circuit electric energy computation chip (5); Phase voltage sampling load module (10) is connected with first secondary circuit electric energy computation chip (5) and second secondary circuit electric energy computation chip (9) respectively; First secondary circuit electric energy computation chip (5) all is connected with pulse signal Shaping Module (8) with second secondary circuit electric energy computation chip (9), and photoelectric sampler (6) also is connected with pulse signal Shaping Module (8) through reverser (7); First secondary circuit electric energy computation chip (5), second secondary circuit electric energy computation chip (9), and pulse signal Shaping Module (8) all be connected with controller (11); In addition, LCD MODULE (12), 4X4 matrix keyboard (13), printer (14), memory module (15) and clock module (16) also all are connected with controller (11); AD/DC switch power module (17) provides electric energy for DC/DC power module (18), and DC/DC power module (18) then provides electric energy for whole detector.
2. a kind of electric power metering device in-situs tester according to claim 1 is characterized in that controller (11) adopts single-chip microcomputer MSP430F149.
3. a kind of electric power metering device in-situs tester according to claim 1 is characterized in that first secondary circuit electric energy computation chip (5), second secondary circuit electric energy computation chip (9) all adopt electric energy computation chip ADE7753.
CN 201220308076 2012-06-28 2012-06-28 Onsite detector of electric energy metering device CN202631727U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220308076 CN202631727U (en) 2012-06-28 2012-06-28 Onsite detector of electric energy metering device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220308076 CN202631727U (en) 2012-06-28 2012-06-28 Onsite detector of electric energy metering device

Publications (1)

Publication Number Publication Date
CN202631727U true CN202631727U (en) 2012-12-26

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103885027A (en) * 2014-03-24 2014-06-25 国家电网公司 On-site quantity transmission device for electric energy meter
CN103941085A (en) * 2014-04-18 2014-07-23 天津师范大学 Low-power-consumption electric energy acquisition device
CN104007411A (en) * 2014-06-13 2014-08-27 遵义长征电器开关设备有限责任公司 Detection and control device for multi-function watt-hour meter
CN104316895A (en) * 2014-10-28 2015-01-28 哈尔滨电工仪表研究所 Single-phase and three-phase power meter detector
CN104597426A (en) * 2014-12-17 2015-05-06 浙江涵普电力科技有限公司 Remote online monitoring method of energy measurement device
CN105301553A (en) * 2015-12-01 2016-02-03 国家电网公司 Multipurpose single/three-phase electric energy meter detector
CN105652118A (en) * 2015-12-29 2016-06-08 国家电网公司 Load instantaneous energy feature-based power grid electric energy load monitoring method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103885027A (en) * 2014-03-24 2014-06-25 国家电网公司 On-site quantity transmission device for electric energy meter
CN103885027B (en) * 2014-03-24 2016-08-17 国家电网公司 A kind of electric energy meter field transmission of quantity value device
CN103941085A (en) * 2014-04-18 2014-07-23 天津师范大学 Low-power-consumption electric energy acquisition device
CN104007411A (en) * 2014-06-13 2014-08-27 遵义长征电器开关设备有限责任公司 Detection and control device for multi-function watt-hour meter
CN104316895A (en) * 2014-10-28 2015-01-28 哈尔滨电工仪表研究所 Single-phase and three-phase power meter detector
CN104597426A (en) * 2014-12-17 2015-05-06 浙江涵普电力科技有限公司 Remote online monitoring method of energy measurement device
CN105301553A (en) * 2015-12-01 2016-02-03 国家电网公司 Multipurpose single/three-phase electric energy meter detector
CN105652118A (en) * 2015-12-29 2016-06-08 国家电网公司 Load instantaneous energy feature-based power grid electric energy load monitoring method
CN105652118B (en) * 2015-12-29 2019-02-26 国家电网公司 A kind of power grid power budget monitoring method based on load instantaneous energy feature

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