CN201993463U - Testing device of digital electric energy meter - Google Patents
Testing device of digital electric energy meter Download PDFInfo
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- CN201993463U CN201993463U CN2011200455418U CN201120045541U CN201993463U CN 201993463 U CN201993463 U CN 201993463U CN 2011200455418 U CN2011200455418 U CN 2011200455418U CN 201120045541 U CN201120045541 U CN 201120045541U CN 201993463 U CN201993463 U CN 201993463U
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Abstract
The utility model provides a testing device of a digital electric energy meter. The device comprises a digital signal power source, a standard meter, a switch, error processing equipment and a control computer, wherein the control computer of the testing device is connected with the digital signal power source and the error processing equipment through an RS485 bus; the digital signal power source and the error processing equipment are controlled by the control computer in a united manner; when the testing device works normally, the working of the digital signal power source, the digital standard meter, the error processor and other related equipment are controlled by master station hardware of the main control computer through the RS485 bus; the master station software adopts a standard 645 protocol to communicate with the meter under test through the RS485 bus and is used for reading metering data and other parameters of the meter under test. The device is suitable for being used for testing and checking the digital electric energy meter.
Description
Technical field
The utility model relates to digitalized electrical energy meter agreement accordance and detects, and belongs to the electric-power metering technical field.
Background technology
Country is building intelligent grid, and the application of digitalized electrical energy meter will be more and more widely.Because what digitalized electrical energy meter received is the pure digi-tal signal, so the error that does not have transmission to cause, the digital value of electric energy meter is calculated can not bring additive error yet, and electric energy meter is not influenced by temperature and long term drift can yet, therefore digitalized electrical energy meter kinematic error under perfect condition is very little, need not detect.But, still can bring certain error to digitalized electrical energy meter in fact owing to following reason.
(1) influence of different mining number of samples to measuring: measure the influence that is subjected to sampling number because digital transformer substation, needs to consider to detect electric energy meter to cycle sampling number difference.
(2: the electric energy metrical harmonic wave is handled by fft analysis and is realized that different sampling numbers also influences the fft analysis result, therefore, needs to consider to detect the digitalized electrical energy meter metering and is subjected to influence of harmonic.
(3): the metering quantization parameter difference of various voltages, current specification correspondence, take out the mathematical model of quantization system, according to voltage, current rating, calculate quantization parameter, do not need according to different user specification update routines.Measure the influence that is subjected to rated voltage and need to consider to detect digitalized electrical energy meter.
(4): digitalized electrical energy meter is not being received the merge cells packet, or the data message of receiving is unreasonable, how to make corresponding fault-tolerant processing, therefore needs to consider to detect the fault-tolerant ability that the digitalized electrical energy meter metering is subjected to.
As from the foregoing, digitalized electrical energy meter is to need to detect, but owing to do not have corresponding calibrating installation at present, does not have corresponding testing equipment, method of testing and verifying attachment, so these digital electric energy meters just do not put into operation through complete test, accuracy and performance can not be guaranteed.For improving performance, technical indicator and the detection technique thereof of digitalized electrical energy meter, improve the quality of products, realize the full intelligence of transformer station, improve operation of power networks management controlling level, must solve the detection problem of digitalized electrical energy meter.
Summary of the invention
The purpose of this utility model is: disclose a kind of chamber and on-the-spot calibrating installation that detects of experimentizing to the digital electric energy meter of low pressure analog quantity interface, can simulate number of ports word formula electric energy meter to low pressure and detect; Can experimentize to the digital electric energy meter of digital interface chamber and the on-the-spot calibrating installation that detects are set up laboratory and on-the-spot digital electric energy meter detection platform.This device cycle sampling number can be provided with arbitrarily from 80-200, sample frequency is adjustable from 4-10k, can detect the influence of harmonic wave to the electric energy meter metering, the emulation merge cells of various on-site actual situations such as can simulation various packet losses, passage block up is used for the various performances of the digital electric energy meter of digital interface are tested.
The utility model digitalized electrical energy meter pick-up unit is made up of digital power signal source, standard scale, switch, Error processing equipment and control computer.The control computer of described pick-up unit links to each other with digital power signal source and Error processing equipment by the RS485 bus, unifies control figure signal power source and Error processing equipment by control computer; Main platform software by main control computer during the verifying attachment operate as normal passes through RS485 bus control figure signal source, digital standard table, error processor and other relevant device work.Main platform software adopts 645 agreements of standard to communicate by letter with tested table by the RS485 bus, is used to read continuous data and other parameters of tested table; Control computer is provided with after the parameter of power source, and shows the parameter value of Set For Current in real time, detects tested table and shows whether apparent value is consistent with setup parameter.Control computer is preserved detected error information, and can generate the form derivation, is convenient to carry out data analysis.
Described device can carry out the various communications protocols compliance test to digitalized electrical energy meter.
Described device can be simulated multiple field working conditions output data frame, can carry out agreement accordance tests such as admission control, state of data channel be unusual.
Described device can detect the influence of harmonic wave to the digitalized electrical energy meter metering.
The utility model beneficial effect compared with the prior art is, in traditional electric energy meter checking device, relate to and simulate signal source partly, power amplifier because of influences such as decay, drift, electromagnetic compatibility and the linearities, the signal of output need compensate, complex circuit designs, precision is restricted, and the device precision is subject to the influence of environment.And the utility model is applied to the detection device of electric energy meter of digital electric energy metered system, except that having kept standard scale module, error comparison loop, the synthetic D/A analog conversion module of the required numeral of tradition electric energy meter checking device, power amplifier module all no longer need, the also amount of needing limit handoff functionality no longer in the error comparison loop.The module that these remove, the root that traditional exactly electric energy meter checking device error produces.
In addition, the detection device of electric energy meter of digitizing metering system, metering system are numerical operation fully, and the error that algorithm and significance bit cause can be ignored in whole metering system.As digital equipment, be subjected to environment temperature or long-term work to cause the possibility of precision drift also not exist.The verification that pick-up unit carries out digital electricity meter is the check to transmission error rates and electric energy meter software design in essence.
The utility model is applicable to digitalized electrical energy meter test, verification use.
Description of drawings
Accompanying drawing is the utility model digitalized electrical energy meter pick-up unit structured flowchart.
Embodiment
The utility model embodiment is shown in figure numbers detection device of electric energy meter structured flowchart.
The present embodiment detection device of electric energy meter is made up of digital power signal source, standard scale, switch, Error processing equipment and control computer.The checking table control computer links to each other with power source and Error processing equipment by the RS485 bus, unifies power controlling source and Error processing equipment by control computer.Main platform software by main control computer during the verifying attachment operate as normal passes through RS485 bus control figure signal source, digital standard table, error processor and other relevant device work.Main platform software is operated under the pattern of parameter Control work signal source by signalization source parameter, and output meets the IEC60044-7/8 normal voltage signal of parameter request.In test process,, simulate various test conditions, tested table is done every test by regulating operational factor.The high-frequency impulse of main platform software control digital watch standard scale output test request is sent to error processor and does follow-up Error Calculation.Main platform software can pass through the RS485 bus interface, reads the charge value of certain section interior metering of time on the digital standard table, is used for comparing with the electric flux of tested table metering.Main platform software adopts 645 agreements of standard to communicate by letter with tested table by the RS485 bus, is used to read continuous data and other parameters of tested table.Control computer is provided with after the parameter of power source, and shows the parameter value of Set For Current in real time, detects tested table and shows whether apparent value is consistent with setup parameter.Control computer is preserved detected error information, and can generate the form derivation, is convenient to carry out data analysis.
(1) can carry out the various communications protocols compliance test to digitalized electrical energy meter
This digitizing detection device of electric energy meter is supported IEC61850-9-1/IEC61850-9-2, IEC60044-7/8 standard, can test the digital electric energy meter with non-traditional mutual inductor (electronic mutual inductor ECT/VT, low-power mutual inductor LPVCT) interface simultaneously.
But the various parameters of this digitizing detection device of electric energy meter flexible configuration IEC61850-9-1, IEC61850-9-2 standard comprise the form of ASDU number, sampling number, specified delay time, Frame etc., adapt to different testing requirements.The cycle sampling number can be provided with arbitrarily from 80-200, sample frequency is adjustable from 4-10k, the emulation of various on-site actual situations such as the various packet losses of energy simulation, passage block up, the experiment that can carry out comprises the fundamental error experiment, admission control experiment, passage are blocked up and are waited IEC61850-9-1, IEC61850-9-2 agreement accordance to test, and the state of data channel of Frame is tested unusually, the amount of the influence experiment of electric parameter, the experimental projects such as basic function experiment of table meter.
Detect the influence of harmonic wave to the digitalized electrical energy meter metering, the electric energy metrical harmonic wave is handled by fft analysis and is realized that different sampling numbers also influences the fft analysis result.
By the Frame of data relay unit, divide and produce multiple signals simultaneously for a plurality of tested tables uses with the output of digital signal source.Realize the multi-epitope verification simultaneously of digitalized electrical energy meter.
This signal source is based on three-phase electrical power system mathematical model structure, the parameter of the mathematical formulae that is adopted in the mathematical model can be set according to the actual needs, by the various situations of parameter simulation operation of power networks are set, carry out sample quantization according to certain sampling rate then under the signal of various parameter condition structures, the quantification manner of data meets the requirement that among IEC61850-9-1, the IEC61850-9-2 continuous data is quantized.Signal source can be constructed the sample data frames under the various parameter conditions of output.
Claims (1)
1. a digitalized electrical energy meter pick-up unit is characterized in that, described pick-up unit is made up of digital power signal source, standard scale, switch, Error processing equipment and control computer; The control computer of described pick-up unit links to each other with digital power signal source and Error processing equipment by the RS485 bus, unifies control figure signal power source and Error processing equipment by control computer; Main platform software by main control computer during the pick-up unit operate as normal passes through RS485 bus control figure signal source, digital standard table, error processor work; Main platform software adopts 645 agreements of standard to communicate by letter with tested table by the RS485 bus, is used to read the continuous data of tested table.
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| CN2011200455418U CN201993463U (en) | 2011-02-24 | 2011-02-24 | Testing device of digital electric energy meter |
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| CN2011200455418U CN201993463U (en) | 2011-02-24 | 2011-02-24 | Testing device of digital electric energy meter |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928805A (en) * | 2012-10-19 | 2013-02-13 | 国电南京自动化股份有限公司 | Multi-meter position instrument for calibrating digital energy meters |
| CN102928810A (en) * | 2012-11-12 | 2013-02-13 | 四川电力科学研究院 | System and method for evaluating accuracy of digital electric energy meter |
| CN102967841A (en) * | 2012-11-29 | 2013-03-13 | 辽宁省电力有限公司电力科学研究院 | Automatic digital multimeter verification system and method based on meter and source integration and application of system and method |
| CN103197276A (en) * | 2013-03-28 | 2013-07-10 | 国家电网公司 | Reliability automatic detecting device of intelligent energy meter |
| CN103809149A (en) * | 2012-11-14 | 2014-05-21 | 国家电网公司 | Checking equipment, device and method for digital electric energy meter |
| CN103954924A (en) * | 2014-05-04 | 2014-07-30 | 国家电网公司 | Measuring device and method for measurement errors of electric measurement meter in frequency fluctuation process |
| CN105259395A (en) * | 2015-11-13 | 2016-01-20 | 国网江西省电力科学研究院 | Metering condition characteristic detector |
| CN105548947A (en) * | 2016-01-28 | 2016-05-04 | 云南电网有限责任公司电力科学研究院 | Method and system of synchronization traceability of digitalization electric energy meter |
| CN105824001A (en) * | 2015-01-06 | 2016-08-03 | 国家电网公司 | Digital electric energy meter IEC61850 conformance testing method and system |
| CN109100678A (en) * | 2018-09-27 | 2018-12-28 | 深圳深宝电器仪表有限公司 | A kind of detection device and detection method for digitalized electrical energy meter |
| CN111562544A (en) * | 2020-07-14 | 2020-08-21 | 武汉格蓝若智能技术有限公司 | Parameter consistency diagnosis method and system for digital electric energy metering system |
| CN112881968A (en) * | 2021-01-12 | 2021-06-01 | 国网上海市电力公司 | Ammeter calibrating device and method |
| CN113640730A (en) * | 2021-07-08 | 2021-11-12 | 深圳市科陆精密仪器有限公司 | Intelligent Internet of things meter electric energy error verification system and method |
-
2011
- 2011-02-24 CN CN2011200455418U patent/CN201993463U/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928805B (en) * | 2012-10-19 | 2015-11-18 | 国电南京自动化股份有限公司 | Multi-epitope digitalized electrical energy meter tester |
| CN102928805A (en) * | 2012-10-19 | 2013-02-13 | 国电南京自动化股份有限公司 | Multi-meter position instrument for calibrating digital energy meters |
| CN102928810A (en) * | 2012-11-12 | 2013-02-13 | 四川电力科学研究院 | System and method for evaluating accuracy of digital electric energy meter |
| CN103809149A (en) * | 2012-11-14 | 2014-05-21 | 国家电网公司 | Checking equipment, device and method for digital electric energy meter |
| CN102967841A (en) * | 2012-11-29 | 2013-03-13 | 辽宁省电力有限公司电力科学研究院 | Automatic digital multimeter verification system and method based on meter and source integration and application of system and method |
| CN102967841B (en) * | 2012-11-29 | 2015-06-10 | 辽宁省电力有限公司电力科学研究院 | Automatic digital multimeter verification system and method based on meter and source integration |
| CN103197276A (en) * | 2013-03-28 | 2013-07-10 | 国家电网公司 | Reliability automatic detecting device of intelligent energy meter |
| CN103954924A (en) * | 2014-05-04 | 2014-07-30 | 国家电网公司 | Measuring device and method for measurement errors of electric measurement meter in frequency fluctuation process |
| CN105824001A (en) * | 2015-01-06 | 2016-08-03 | 国家电网公司 | Digital electric energy meter IEC61850 conformance testing method and system |
| CN105824001B (en) * | 2015-01-06 | 2020-08-28 | 国家电网公司 | Method and system for testing IEC61850 conformance of digital electric energy meter |
| CN105259395A (en) * | 2015-11-13 | 2016-01-20 | 国网江西省电力科学研究院 | Metering condition characteristic detector |
| CN105548947B (en) * | 2016-01-28 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of synchronous source tracing method of digitalized electrical energy meter and system |
| CN105548947A (en) * | 2016-01-28 | 2016-05-04 | 云南电网有限责任公司电力科学研究院 | Method and system of synchronization traceability of digitalization electric energy meter |
| CN109100678A (en) * | 2018-09-27 | 2018-12-28 | 深圳深宝电器仪表有限公司 | A kind of detection device and detection method for digitalized electrical energy meter |
| CN111562544A (en) * | 2020-07-14 | 2020-08-21 | 武汉格蓝若智能技术有限公司 | Parameter consistency diagnosis method and system for digital electric energy metering system |
| CN111562544B (en) * | 2020-07-14 | 2020-11-03 | 武汉格蓝若智能技术有限公司 | Parameter consistency diagnosis method and system for digital electric energy metering system |
| CN112881968A (en) * | 2021-01-12 | 2021-06-01 | 国网上海市电力公司 | Ammeter calibrating device and method |
| CN112881968B (en) * | 2021-01-12 | 2023-03-07 | 国网上海市电力公司 | Ammeter calibrating device and method |
| CN113640730A (en) * | 2021-07-08 | 2021-11-12 | 深圳市科陆精密仪器有限公司 | Intelligent Internet of things meter electric energy error verification system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Effective date: 20121206 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121206 Address after: 330096 Nanchang private science and Technology Park, Jiangxi Road, No. 88 Patentee after: Jiangxi Electric Power Science Academy Patentee after: State Grid Corporation of China Address before: 330096 Nanchang private science and Technology Park, Jiangxi Road, No. 88 Patentee before: Jiangxi Electric Power Science Academy |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20200224 |