CN205450247U - Watt -hour meter calibrating - Google Patents

Watt -hour meter calibrating Download PDF

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Publication number
CN205450247U
CN205450247U CN201521105644.3U CN201521105644U CN205450247U CN 205450247 U CN205450247 U CN 205450247U CN 201521105644 U CN201521105644 U CN 201521105644U CN 205450247 U CN205450247 U CN 205450247U
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China
Prior art keywords
electric energy
energy meter
data
wave filter
power source
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CN201521105644.3U
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Chinese (zh)
Inventor
王昕�
李英娜
曹敏
李川
李仕林
于辉
蒋婷婷
魏龄
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Electric Power Research Institute of Yunnan Power System Ltd
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Kunming Ligong Guangzhi Detection Technology Co ltd
Electric Power Research Institute of Yunnan Power Grid Co Ltd
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Abstract

The utility model provides a watt -hour meter calibrating, calibration equipment includes the standard electric energy meter of parallel connection and is surveyed electric energy meter, parallel connection standard electric energy meter with surveyed the both ends of electric energy meter and connected power source and the next machine respectively, the power source with the other end of the next machine is connected through the host computer, the wave filter is drawn together to the next press packed bale. The utility model provides a watt -hour meter calibrating is through adding the wave filter in the next machine to removal harmonic is to the interference of electric energy meter, and then reaches the purpose that logarithmic word metering device carries out accurate check -up. The utility model provides a watt -hour meter calibrating still increases real -time clock to up to standard table and the data synchronisation that awaits measuring and show, and then realize the integration to data, still through IEC61850 agreement and ZIGBEE's transmission, show the standard to carry out error analysis with the data of the table that awaits measuring simultaneously, reach the effect in control power source simultaneously, accomplish that power source output is automatic.

Description

A kind of electric energy meter checking device
Technical field
This utility model relates to electrical engineering technical field, more specifically, relates to a kind of electric energy meter checking device.
Background technology
National metrological regulations is fixed, and the Electric Energy Tariff Point Metering Device for trade settlement must accept compulsory verification.Electric power meter mainly has electronic electric energy metering device and digital balance device two kinds at present, wherein, the working method of electronic electric energy metering device is: electromagnetic transformer output analog voltage signal and current signal, electric energy meter is sent to by secondary cable, analog quantity is converted into digit pulse amount by electric energy meter, electric energy in enumerator stored counts calculates certain period again, but electronic electric energy metering device has bigger uncertainty of measurement.The working method of digital balance device is: electronic mutual inductor output digital voltage signal and current signal, by fiber-optic transfer to combining unit, voltage x current information is combined into the Frame of cannonical format by combining unit according to IEC61850-9 standard, digital electricity meter receives this Frame, directly carries out mathematical calculation and draws electric energy.
EC61850 standard is the unique universal standard of electric device automatic field, this standard makes the information gathering of transformer station, transmission process and output procedure will all realize digitized, also is able to realize device intelligence, communication network, model and communication protocol simultaneously and unitizes and computer-aided traffic control.The metering method of digitized formula carries out digital quantity transmission owing to using optical-fibre channel, and can effectively eliminate secondary voltage drop and analog/digital (A/D) transformed error of simulation electric energy meter, improve accuracy and the degree of stability of electric energy metrical, thus promote digital transformer substation technology and can cause the change of Electric Energy Metering Technology.
But, the digitized measurement yet suffers from a lot of technical problems, error robustness and operational reliability such as electronic mutual inductor are poor, communication protocol is inconsistent, magnitude tracing and field-checking ability, the problem that standard, code and specification are inconsistent etc., the harmonic electric energy in electric energy metrical also can produce large effect to the digitized measurement simultaneously.Owing to there are the problems referred to above, therefore cause lacking complete digital metering transmission of quantity value system, and then digital balance device cannot be verified.
Utility model content
The purpose of this utility model is to provide a kind of electric energy meter checking device, to solve the problem that cannot verify digital balance device due to the impact of harmonic electric energy described in background technology.
In order to solve above-mentioned technical problem, this utility model following technical scheme of offer:
This utility model provides a kind of electric energy meter checking device, described calibration equipment includes the standard electric energy meter of parallel join and tested electric energy meter, the described standard electric energy meter of parallel join and the two ends of described tested electric energy meter connect power source and slave computer respectively, and described power source is connected by host computer with the other end of described slave computer;Described slave computer includes wave filter.
Preferably, described wave filter includes the first wave filter being connected with described standard electric energy meter and the second wave filter being connected with described tested electric energy meter.
Preferably, described slave computer also includes the first A/D converter being connected with described first wave filter and the second A/D converter being connected with described second wave filter.
Preferably, described slave computer also includes real-time clock, and described real-time clock is connected with described first A/D converter and described second A/D converter respectively.
Preferably, described slave computer also includes that digital signal processor, described digital signal processor are connected with described real-time clock.
Preferably, described slave computer also includes that memorizer, described memorizer are connected with described digital signal processor.
Preferably, described host computer is PC processor.
This utility model provides a kind of electric energy meter checking device, described calibration equipment includes the standard electric energy meter of parallel join and tested electric energy meter, the described standard electric energy meter of parallel join and the two ends of described tested electric energy meter connect power source and slave computer respectively, and described power source is connected by host computer with the other end of described slave computer;Described slave computer includes wave filter.The electric energy meter checking device that this utility model provides is by adding wave filter in slave computer, thus the interference that harmonic carcellation is to electric energy meter, and then reach the purpose that digital balance device is accurately verified.The electric energy meter checking device that this utility model provides also increases real-time clock, thus reach the data syn-chronization of standard scale and table to be measured, and then realize the integration to data, simultaneously also by IEC61850 agreement and the transmission of ZIGBEE, the data of standard scale Yu table to be measured are carried out error analysis, reach to control the effect of power source simultaneously, accomplish that power source exports automatization.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in this utility model embodiment, in describing embodiment below, the required accompanying drawing used is briefly described, apparently, for those of ordinary skills, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the electric energy meter checking device that this utility model embodiment provides;
Fig. 2 is the another kind of structural representation of the electric energy meter checking device that this utility model embodiment provides;
Fig. 3 is the flow chart of the electric energy meter checking device method of calibration that this utility model embodiment provides;
Fig. 4 is another flow chart of the electric energy meter checking device method of calibration that this utility model embodiment provides.
Detailed description of the invention
The purpose of this utility model is to provide electric energy meter checking device, solves the problem that cannot verify digital balance device due to the impact of harmonic electric energy.
For the technical scheme making those skilled in the art be more fully understood that in this utility model embodiment, and it is understandable to enable the above-mentioned purpose of this utility model embodiment, feature and advantage to become apparent from, below in conjunction with the accompanying drawings the technical scheme in this utility model embodiment is described in further detail.
Refer to accompanying drawing 1, accompanying drawing 1 shows the structural representation of the electric energy meter checking device that this utility model embodiment provides.It can be seen that the electric energy meter checking device that this utility model embodiment provides includes the standard electric energy meter of parallel join and tested electric energy meter from accompanying drawing 1, the described standard electric energy meter of parallel join and the two ends of described tested electric energy meter connect power source and slave computer respectively, and described power source is connected by host computer with the other end of described slave computer;Described slave computer includes wave filter.
Wherein, the two ends of power source connect host computer, standard electric energy meter and tested electric energy meter respectively, power source receives the instruction of this device power demand and standard electric energy meter that host computer sent and the data message that tested electric energy meter is passed back by ZIGBEE, power source after receiving the instruction that host computer sends according to this command output power to standard electric energy meter and tested electric energy meter.Power source receives the instruction of host computer and follows IEC61850 agreement.
The two ends of slave computer connection standard electric energy meter, tested electric energy meter and host computer respectively, and slave computer includes wave filter, i.e. the two ends of wave filter connection standard electric energy meter, tested electric energy meter and host computer respectively.Voltage, electric current and the pulse data that wave filter was able to receive that and returned standard electric energy meter and tested electric energy meter is sended over by port RS485, data now are with standard electric energy meter and the voltage of tested electric energy meter, electric current and pulse data.Wave filter is filtered processing according to the fast fourier transform algorithm (fft algorithm) voltage, electric current and pulse data to sending over, and sending to host computer without standard electric energy meter and the voltage of tested electric energy meter, electric current and pulse data digital signal data after processing.Wave filter is increased, it is possible to harmonic wave is suppressed or eliminates in the electric energy meter checking device that this utility model embodiment provides, thus the interference that harmonic carcellation is to electric energy meter, and then reach the purpose that digital balance device is accurately verified.
The two ends of host computer connect slave computer and power source respectively, and host computer receives the digital signal data sended over by wave filter, digital signal data carries out error analysis, and passes power source back after error analysis integration.
Accordingly, this utility model embodiment additionally provides the method for calibration of electric energy meter checking device, and idiographic flow refer to accompanying drawing 3.The method of calibration that this utility model embodiment provides includes:
S101: output source data signals is sent to power source;
Output source data is converted into data signal by S102: power source;
S103: data signal sends to standard electric energy meter and tested electric energy meter;
Data signal is sent the wave filter to slave computer by S104: standard electric energy meter and tested electric energy meter respectively;
Data signal is filtered processing by S105: wave filter;
S106: the data after Filtering Processing send to host computer;
S107: host computer carries out error analysis to sending the data come, and sends error analysis data to power source.
Concrete being described as of above-mentioned method of calibration:
Output source data signals needed for this device is instructed by the way of ZIGBEE is wirelessly transferred and sends to power source by S101: host computer;
Output source data is converted into power source by S102: power source needs voltage, electric current and the pulse data signal of output;
Voltage, electric current and pulse data signal are respectively sent to standard electric energy meter and tested electric energy meter by S103: power source;
The voltage sended over, electric current and pulse data signal are sent the wave filter to slave computer by port RS485 by S104: standard electric energy meter and tested electric energy meter respectively, and data signal now is with standard electric energy meter and the voltage of tested electric energy meter, electric current and pulse data;
S105: wave filter is filtered processing according to fft algorithm to standard electric energy meter and the voltage of tested electric energy meter, electric current and pulse data signal, processes formula and isWherein n is the number of times of harmonic wave, PnFor the available power of n-th harmonic, unFor the amplitude of voltage regulation nth harmonic component, inFor the amplitude of electric current n-th harmonic component,For the initial phase angle of voltage regulation nth harmonic component,Initial phase angle for electric current n-th harmonic component.
Data after Filtering Processing are sent to host computer by S106: wave filter, and IEC61850 agreement is followed in the transmission of these data;
S107: host computer carries out error analysis to sending the data come, and sends the data after error analysis to power source, thus completes a circulation.
Refer to accompanying drawing 2, accompanying drawing 2 shows the another kind of structural representation of the electric energy meter checking device that this utility model embodiment provides.Structure based on the first electric energy meter checking device, the wave filter in the electric energy meter checking device that this utility model embodiment provides includes the first wave filter being connected with standard electric energy meter and the second wave filter being connected with tested electric energy meter.Voltage, electric current and the pulse data signal that standard electric energy meter is sended over by the first wave filter is filtered processing, voltage, electric current and the pulse data signal that tested electric energy meter is sended over by the second wave filter is filtered processing, so that disturbing from voltage, electric current and the pulse data of the output of two electric energy meters are irrelevant, be conducive to monitoring the detection of tested electric energy meter.
Further, first wave filter is also connected with the first A/D converter, second wave filter and the second A/D converter are connected, the data that such set-up mode is easy to the first A/D converter and the first wave filter and the second wave filter are sended over by the second A/D converter respectively are converted to be easy to the digital signal of computer disposal, data the most between the two also will not interact, advantageously in the detection monitoring tested electric energy meter.
The electric energy meter checking device that this utility model embodiment provides also includes real-time clock, and this real-time clock is connected with the first A/D converter and the second A/D converter respectively.The conversion data that real-time clock receives the first A/D converter simultaneously and the second A/D converter sends over, and two parts of conversion data are filtered and integrate, reach the real time synchronization of two paths of data information.A data transmission after real-time clock will be integrated processes to digital signal processor.
Further, the electric energy meter checking device that this utility model embodiment provides also includes digital signal processor (DSP), and DSP is connected with real-time clock.By assembly language software, DSP judges whether the data that real-time clock sends after integrating are one group of synchrodata, if one group of synchrodata is then screened and adjusts, to reach asynchronous data synchronization, it is ensured that the real time implementation of data.Data after DSP will adjust send to memorizer.
Further, the electric energy meter checking device that this utility model embodiment provides also includes memorizer (RAM), RAM with DSP is connected.Data after adjusting are stored by RAM, and send to host computer.
Host computer in the electric energy meter checking device that this utility model embodiment provides is PC processor.
The second electric energy meter checking device structure provided based on this utility model embodiment, this utility model embodiment additionally provides the method for calibration of electric energy meter checking device, and flow chart refer to accompanying drawing 4.The method of calibration of the electric energy meter checking device that this utility model embodiment provides is:
S201: output source data signals is sent to power source;
Output source data is converted into data signal by S202: power source;
S203: data signal sends to standard electric energy meter and tested electric energy meter;
Data signal is sent the first wave filter to slave computer and the second wave filter by S204: standard electric energy meter and tested electric energy meter respectively;
Data signal is filtered processing by the S205: the first wave filter and the second wave filter respectively, and is respectively sent to the first A/D converter and the second A/D converter;
Filtered data is changed by the S206: the first A/D converter and the second A/D converter, and is respectively sent to real-time clock;
Translated data is filtered and integrates by S207: real-time clock, and sends to digital signal processor;
Data after integrating are adjusted by S208: digital signal processor, and send to memorizer;
Data after adjusting are stored by S209: memorizer, and send to host computer.
S210: host computer carries out error analysis to sending the data come, and sends error analysis data to power source.
Concrete being described as of above-mentioned method of calibration:
Output source data signals needed for this device is instructed by the way of ZIGBEE is wirelessly transferred and sends to power source by S201: host computer;
Output source data is converted into power source by S202: power source needs voltage, electric current and the pulse data signal of output;
Voltage, electric current and pulse data signal are respectively sent to standard electric energy meter and tested electric energy meter by S203: power source;
The voltage sended over, electric current and pulse data signal are sent the first wave filter to slave computer and the second wave filter by port RS485 by S204: standard electric energy meter and tested electric energy meter respectively, and data signal now is respectively provided with standard electric energy meter and the voltage of tested electric energy meter, electric current and pulse data;
S205: the first wave filter and the second wave filter are filtered processing according to fft algorithm to standard electric energy meter and the voltage of tested electric energy meter, electric current and pulse data signal respectively, and the data after processing are respectively sent to the first A/D converter and the second A/D converter;
When being filtered processing according to fft algorithm, the process formula used is Wherein n is the number of times of harmonic wave, PnFor the available power of n-th harmonic, unFor the amplitude of voltage regulation nth harmonic component, inFor the amplitude of electric current n-th harmonic component,For the initial phase angle of voltage regulation nth harmonic component,Initial phase angle for electric current n-th harmonic component.
Data after Filtering Processing are changed by the S206: the first A/D converter and the second A/D converter, being converted to be easy to the digital signal of computer disposal, the digital signal after conversion is sent to real-time clock by the first A/D converter and the second A/D converter respectively simultaneously;
Translated data is filtered and integrates by S207: real-time clock, and the data after reaching the real time synchronization of two paths of data information and integrating send to DSP;
By assembly language software, S208:DSP judges whether the data that real-time clock sends after integrating are one group of synchrodata, if one group of synchrodata is then screened and adjusts, to reach asynchronous data synchronization, it is ensured that the real time implementation of data.Data after DSP will adjust send to memorizer;
Data after adjusting are stored by S209: memorizer, and the data after adjusting by the way of ZIGBEE is wirelessly transferred under IEC61850 agreement send in the ZIGBEE of PC datatron.
S210:PC processor pair memorizer sends the data come and carries out error analysis, and sends error analysis data to power source, thus completes a circulation.
The electric energy meter checking device that this utility model provides is by adding wave filter in slave computer, thus the interference that harmonic carcellation is to electric energy meter, and then reach the purpose that digital balance device is accurately verified.The electric energy meter checking device that this utility model provides also increases real-time clock, thus reach the data syn-chronization of standard scale and table to be measured, and then realize the integration to data, simultaneously also by IEC61850 agreement and the transmission of ZIGBEE, the data of standard scale Yu table to be measured are carried out error analysis, reach to control the effect of power source simultaneously, accomplish that power source exports automatization.
Although having described this utility model in the way of specific embodiment, but to those skilled in the art, in the case of the spirit and scope of the present utility model limited without departing from appended claims, this utility model can be carried out variations and modifications, these change and modifications and are also included in the range of this utility model.

Claims (7)

1. an electric energy meter checking device, it is characterized in that, described calibration equipment includes the standard electric energy meter of parallel join and tested electric energy meter, the described standard electric energy meter of parallel join and the two ends of described tested electric energy meter connect power source and slave computer respectively, and described power source is connected by host computer with the other end of described slave computer;Described slave computer includes wave filter.
Electric energy meter checking device the most according to claim 1, it is characterised in that described wave filter includes the first wave filter being connected with described standard electric energy meter and the second wave filter being connected with described tested electric energy meter.
Electric energy meter checking device the most according to claim 2, it is characterised in that described slave computer also includes the first A/D converter being connected with described first wave filter and the second A/D converter being connected with described second wave filter.
Electric energy meter checking device the most according to claim 3, it is characterised in that described slave computer also includes real-time clock, described real-time clock is connected with described first A/D converter and described second A/D converter respectively.
Electric energy meter checking device the most according to claim 4, it is characterised in that described slave computer also includes that digital signal processor, described digital signal processor are connected with described real-time clock.
Electric energy meter checking device the most according to claim 5, it is characterised in that described slave computer also includes that memorizer, described memorizer are connected with described digital signal processor.
7. according to the electric energy meter checking device described in any one in claim 1-6, it is characterised in that described host computer is PC processor.
CN201521105644.3U 2015-12-28 2015-12-28 Watt -hour meter calibrating Active CN205450247U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105652231A (en) * 2015-12-28 2016-06-08 云南电网有限责任公司电力科学研究院 Electric energy meter calibration system and calibration method thereof
CN110554348A (en) * 2019-08-15 2019-12-10 国网江西省电力有限公司电力科学研究院 Distributed detection method for remote electric measuring instrument
CN112881968A (en) * 2021-01-12 2021-06-01 国网上海市电力公司 Ammeter calibrating device and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105652231A (en) * 2015-12-28 2016-06-08 云南电网有限责任公司电力科学研究院 Electric energy meter calibration system and calibration method thereof
CN110554348A (en) * 2019-08-15 2019-12-10 国网江西省电力有限公司电力科学研究院 Distributed detection method for remote electric measuring instrument
CN112881968A (en) * 2021-01-12 2021-06-01 国网上海市电力公司 Ammeter calibrating device and method

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C14 Grant of patent or utility model
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20191121

Address after: Yunda economic and Technological Development Zone in Yunnan province Kunming city 650217 West Road No. 105

Patentee after: Electric Power Research Institute of Yunnan Power System Ltd

Address before: Yunda economic and Technological Development Zone in Yunnan province Kunming city 650217 West Road No. 105

Co-patentee before: KUNMING LIGONG GUANGZHI DETECTION TECHNOLOGY CO., LTD.

Patentee before: Electric Power Research Institute of Yunnan Power System Ltd