CN106646333A - Intelligent electric energy meter on-line monitoring and remote control system - Google Patents
Intelligent electric energy meter on-line monitoring and remote control system Download PDFInfo
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- CN106646333A CN106646333A CN201611186248.7A CN201611186248A CN106646333A CN 106646333 A CN106646333 A CN 106646333A CN 201611186248 A CN201611186248 A CN 201611186248A CN 106646333 A CN106646333 A CN 106646333A
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- 239000004973 liquid crystal related substance Substances 0.000 claims description 3
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
Abstract
The invention discloses an intelligent electric energy meter on-line monitoring and remote control system. An automatic monitoring detection system comprises an electric energy meter verification device, a network camera, an Ethernet switch, and a meter hanging rack. An automatic load control system comprises a network relay and a host computer control system. A protection system comprises an air switch. The electric energy meter verification device comprises a computer, a signal source, a programmed control power source, a standard electric energy meter, and an error processor. An RS-485 bus way is adopted by communication among various modules in the verification device, and a signal source is used for the unified control of the working of the various modules. An RS232 interface is adopted for the communication between the electric energy meter verification device and a host computer, and the host computer is used to control the meter calibration working of the verification device. Error acquisition operation, determining operation, rounding operation, storage operation, and printing operation are completed at the same time. The real-time on-line monitoring and the remote control of the intelligent electric energy meter are realized effectively and accurately.
Description
Technical field
The present invention relates to a kind of intelligent electric energy meter on-line monitoring and tele-control system.
Background technology
Used as the electric power enterprise of pillar industry in national economy, its productive prospecting is that power plant generates electricity, power supply department is powered, used
Family electricity consumption these links are linked to be a big system.In this process, electric energy is produced and sold and is made as a kind of commodity
With.Electric energy metrical is the sub- ＂ of ＂ weighing levers that electric energy is swapped as commodity, is electric power enterprise and Electricity customers, electrical network and generating
Examined between factory, electrical network and electrical network and economic balance foundation.The precision of electric energy metrical and power system both sides of supply and demand
Economic interests it is closely bound up.
Electronic electric energy meter is the important tool of electric energy metrical, is related to the interests of huge numbers of families.It has certainty of measurement
It is high, the features such as electric quantity data automatic data collection realization, remote meter reading and many rate time-sharing measurements can be carried out, therefore the series of products exist
Increase sharply in power system.The yield of China's electronic electric energy meter has leapt to the whole world first.But the overall electronic type electricity of China
The also larger gap compared with international famous brand name of the technology content of energy table, reliability level.Electric energy meter be " electricity " this
The measurement instrument of specialty goods is planted, while and be charge calculation foundation, need non-stop run per hour daily.And electronic type is electric
But because being made up of integrated circuit and too many electronic devices and components, the change of various factors loses may one of them to energy table
Effect, causes electric energy meter not measure or electricity mistake in computation, so as to cause electric energy metrical dispute.So, from safeguard power consumer and
The angle of power supply enterprise's interests is set out, and the quantification stability of electronic electric energy meter is extremely important.Ammeter producer and technical body grind
One piece of system meets in laboratory environments the electronic electric energy meter of elementary error requirement and multi-functional requirement with regard to current scientific and technological water
It is not difficult for flat.But to make the long-term normal work of electronic electric energy meter, accurately under rugged environment condition and electric condition
Metering, it is necessary to which in-depth study is made to many correlation techniques of electric energy meter.
Usually there is LCDs mess code, not loss of data, quantity calculation, program in the electronic electric energy meter installed at the scene
The phenomenons such as mistake.But when the table separates scene, sending some failures when standard laboratory is tested back to can disappear or no longer reappear.
Therefore, for the metering performance under electric energy meter at the scene actual operating mode is surveyed and analysis has great importance.
Abroad, reliability consideration starts from the U.S., and Japan is the up-and-coming youngster of Reliability Engineering.The reliability of product is ground
Study carefully and experienced abroad the budding stage（The 40's), establishing stage (the 50's), the all-round developing stage (the 60's), into
Ripe stage (the 70's) and goed deep into developing stage (since the 80's) so that reliability be related to various product it
In.In recent years, the focus of international reliability engineering research mainly has：Without maintenance validity period (MFOP), reliability index system and
The aspects such as its checking, reinforcement Design of Reliability, enforcement integrated structure design, enforcement network management.In electric energy metrical
With energy efficiency management field, the combustion gas of Britain and power industry regulator OFGEM (The Office of Gas and
Electricity Markets) according to Siemens SN29500 as national electric energy meter reliability evaluation standard.But
It is reliability that OFGEM only evaluates the electric energy meter through long period, batch production, i.e., using special dependable software point
Analysis instrument, it is contemplated that the Q-percentile life of analysis electric energy meter, by timing Based on Censored Data accelerating aging test electric energy meter is verified
Q-percentile life.At present IEEE is also discussing IEC62059 (electric power meter is credible) standards and is issuing in part
Hold, an important step has been stepped in terms of electric energy metrical reliability international standard.However, IEEE is with regard to electronic electric energy meter reliability
Property standard method be based on the indoor degradation to measuring equipment of experiment, this evaluation method environment is excessively simple, nothing
Method reappears electric energy meter actual motion environment at the scene comprehensively.
Mainly there is JJG596-2012 the country for the quality evaluation of electronic electric energy meter《Electronic electric energy meter calibrating rule
Journey》、Q/GDW1364-2013《Single-phase intelligent electric energy meter technical specification》、Q/GDW1827-2013《Three-phase intelligent electric-energy meter technology
Specification》Etc. a series of vertification regulations, specification.These Regulations are set up on the basis of the past mechanical power energy meter
, the selection of some of which detection project, especially error testing point can not fully meet the needs of calibrating.
Further, since electronic electric energy meter now typically all carries out data processing using single-chip microcomputer, so electronic type is electric
The reliability of energy table is mainly reflected in two aspects of software reliability and hardware reliability.Hardware reliability is mainly reflected in when outer
Portion's bad environments（Such as temperature, humidity are beyond normal range (NR), spread of voltage etc.）And long-term charging operation and in electric energy meter
The equal normal work of all kinds of electronic devices and components and do not fail.Software reliability is mainly manifested in when electric energy meter is in laboratory verification process
In due to examining and determine measure error that principle and calibration method imprecision cause when calibrating data result accurately and reliably.Therefore, having must
Under setting up actual environment, intelligent electric energy meter on-line monitoring system, so as to electronic electric energy meter actual motion environment at the scene
Under metering performance comprehensively analyzed.
The content of the invention
The technical problem to be solved is to provide a kind of intelligent electric energy meter on-line monitoring and tele-control system,
Realize and accurate real time on-line monitoring and remotely control more effective to intelligent electric energy meter.
Technical scheme is as follows：
Intelligent electric energy meter is monitored on-line and tele-control system, and it includes automatic monitor and detection system, automatic Load control system
And protection system, it is characterised in that：Automatically monitor and detection system is handed over comprising electric energy meter checking device, web camera, Ethernet
Change planes and meter hanging frame；Automatic Load control system includes network relay and upper computer control system；Protection system includes air
Switch；Electric energy meter checking device includes computer, signal source, program controled power source, standard electric energy meter and error processor, verification dress
Internal each intermodule is put using RS-485 bus forms, each module work is uniformly controlled by signal source；Electric energy meter checking device with
Communication between host computer adopts RS232 interfaces, calibration work is carried out by PC control calibration equipment, while completing error
Gather, judge, changing whole, storage and printing.
Described signal source includes programmable digital logic array CPLD chips, single-chip microprocessor MCU and D/A chips；MCU is pressed will
Ask carries out being stored in after Digital Discrete in RAM by sine wave fundamental wave or the harmonic value of superposition, and frequency reference generator is by calculating
The sine wave digital quantity that device will be stored in RAM is input into D/A converter, is respectively obtained and have with each other certain phase relation
Digit synthesis sinusoidal signal, then through active low-pass filter, become voltage and current signal of the distortion factor less than 0.2%, as electricity
The signal input of pressure and electric current is to power amplifier；The amplitude of signal source is adjusted and adopts 16 D/A converters, reaches fineness adjustment
To the full scale less than 0.01%.
The voltage and current standard sine signal that signal source is produced, is sent to respectively by respective feedback compensation adjustment circuit
Voltage power amplifier and current amplification carry out power amplification, and the sinusoidal signal of amplification is sent to calibrated meter Jing after voltage output transformer transformation
And standard electric energy meter, the sinusoidal current signal of amplification exported after rising current transformer up-flow by the current output terminal of device,
Current lifting device is returned to after concatenation standard scale and each calibrated meter current coil；Output voltage, current signal Jing electric currents, Voltage Feedback sampling
Mutual inductor sample, feeds back to the feedback compensation adjustment circuit of power amplifier prime；If device produces alarm signal feeds back to signal source, lead to
The output of signal source stop signal is crossed, and makees alarm.
Standard electric energy meter samples tested voltage and current Jing after respective A/D analog-digital converters, DSP is sent to respectively digital
Processing system, DSP does real-time U, I computing, obtains actual power P, angle, power factor etc., is produced by P control frequency generators
Ratio is exported with the high-frequency impulse of P, and the pulse is electric energy high impulse, and electric energy low-frequency pulse is obtained for standard verification table by frequency divider
When use, to interface, single-chip microcomputer and DSP carry out real-time communication to the output of high and low frequency electrical energy pulse, by liquid crystal display measured value.
In standard scale and tested table all in the case of continuous operation, the high-frequency pulse signal of standard scale sends into Error processing
Device, when calibrated meter has turned certain umber of pulse, error processor reads the high-frequency impulse number of the standard scale added up in this period
As actual measurement high-frequency impulse number m, then with preset high-frequency impulse number m0Compare.
The present invention economic effect be：
Firstth, each intermodule in calibration equipment inside adopts RS-485 bus forms, and by signal source each module work is uniformly controlled, this
Sample had both strengthened overall reliability, and the expandability of device is improve again.
Secondth, power amplifier employs advanced pulse modulation technology, big, defeated with high conversion efficiency, output capacity
Go out the features such as reliability is high, load capacity is strong, output is stable.And devise perfect abnormal protection, major loop overcurrent protection, device
Part overtemperature protection, output short-circuit overload, output open circuit protection etc., enable power amplifier long time stability to work.
3rd, standard electric energy meter adopts latest digital electronic technology, the intelligent many work(with DSP high speed processors as core
Can high accuracy power measuring instrument.
4th, error processor is controlled using single MCU, and data-handling capacity is strong, fast operation, and computer passes through
Signal source is communicated to Error Calculator, completes the measurement to error and the collection of error information.Error processor can be realized
The functions such as electric energy error calculating, test of having good luck, startup/false actuation test, period switching error test, the test of requirement circular error.
Specific embodiment
The present invention is further illustrated with reference to embodiment.
Embodiments of the invention include automatic monitor and detection system, automatic Load control system and protection system.Automatically supervise
Control detecting system includes electric energy meter checking device, web camera, Ethernet switch and meter hanging frame；Automatic Load control system
Comprising network relay and upper computer control system；Protection system includes air switch.
When using, meter hanging frame and web camera are placed on outdoor, electric energy meter checking device, network relay and Ethernet
Switch is placed indoors, often covers calibration equipment comprising at computer, signal source, program controled power source, standard electric energy meter and error
The units such as reason device, under control of the computer, signal source produces the voltage of setting, current signal and delivers to power source, and power source is carried
For the voltage and current signal needed for calibrated meter, standard electric energy meter, standard scale electric energy meter is converted into high frequency letter actual electric energy
Number export to error system, error processor receives high-frequency pulse signal, and compare with theoretical umber of pulse and draw electric energy error, electricity
Energy error information is locally displayed, it is also possible to read by communication.The running status of web camera monitor in real time electric energy meter, network
Relay can be with the on off operating mode of remotely control electric energy meter.Often cover calibration equipment and configure a temperature sensor, with communication interface,
It is connected with computer.
Often cover calibration equipment and include computer, signal source, program controled power source, standard electric energy meter and error processor, verification
The each intermodule in device inside adopts RS-485 bus forms, and by signal source each module work is uniformly controlled, and has so both strengthened whole
The reliability of body, improves the expandability of device again, and signal source is the data switching center of calibration equipment, is whole verification dress
The operation maincenter put, by it each module work is uniformly controlled.Communication between calibration equipment and host computer adopts RS232 interfaces,
Can control calibration equipment by host computer carries out all calibration work, at the same complete error gather, judge, change it is whole, storage and
The operation such as printing.Web camera is arranged on where 2 meters from outdoor pocket watch unit, can be with the operation shape of monitor in real time electric energy meter
State, and liquid crystal display.Network relay is arranged on behind Ethernet switch, performs the break-make order that host computer sends.
Signal source employs the digital synthesis signal technology of advanced frequency-shift keying, amplitude modulation, phase modulation, can by powerful
Programmed digital logic array CPLD chips, single-chip microprocessor MCU, D/A chips etc. are constituted.MCU is on request by sine wave fundamental wave or superposition
Harmonic value carry out being stored in after Digital Discrete in RAM, frequency reference generator will be stored in the sine in RAM by calculator
Ripple digital quantity is input into D/A converter, respectively obtains the digit synthesis sinusoidal signal with certain phase relation with each other.Jing again
Cross active low-pass filter, become the distortion factor less than 0.2% voltage and current signal, as voltage and current signal input extremely
Power amplifier.The amplitude of signal source is adjusted and adopts 16 D/A converters, makes fineness adjustment be less than 0.01% full scale.
It is as the principle of the power amplifier of power source：The voltage and current standard sine signal that signal source is produced, point
Not being sent to voltage power amplifier and current amplification by respective feedback compensation adjustment circuit carries out power amplification.The sinusoidal signal of amplification
Calibrated meter and standard electric energy meter are sent to Jing after voltage output transformer transformation.The sinusoidal current signal of amplification passes through rising current transformer
Exported by the current output terminal of device after up-flow, after concatenation standard scale and each calibrated meter current coil current lifting device is returned to.Output
Voltage, current signal Jing electric currents, Voltage Feedback sampling mutual inductor sample, feed back to the feedback compensation adjustment circuit of power amplifier prime.
If device produces alarm signal can rapidly feed back to signal source, exported by signal source stop signal, and make alarm.
Standard electric energy meter operation principle：Tested voltage and current is sampled Jing after respective A/D analog-digital converters, is sent respectively
To DSP digital processing systems, DSP does real-time U, I computing, obtains actual power P, angle, power factor etc., and by P frequency is controlled
Generator produces ratio and exports with the high-frequency impulse of P, and the pulse is electric energy high impulse, obtains electric energy low-frequency pulse by frequency divider and supplies
Use during standard verification table, the output of high and low frequency electrical energy pulse is to interface：Simultaneously single-chip microcomputer and DSP carry out real-time communication, by liquid
Crystalline substance shows measured value.
Error processor of the present invention is using " the preset method of the high-frequency impulse " inspection in the standard electric energy meter method of national Specification
Determine electric energy meter, calculate by relative error γ of school electric energy meter（%）.In standard scale and tested table all in the case of continuous operation,
The high-frequency pulse signal of standard scale sends into error processor, and when calibrated meter has turned certain umber of pulse, error processor reads this
Section the time in add up standard scale high-frequency impulse number as actual measurement high-frequency impulse number m, then with preset high-frequency impulse number m0Phase
Relatively.
Claims (5)
1. intelligent electric energy meter is monitored on-line and tele-control system, and it includes automatic monitor and detection system, automatic Load control system
System and protection system, it is characterised in that：Automatically monitor and detection system includes electric energy meter checking device, web camera, Ethernet
Switch and meter hanging frame；Automatic Load control system includes network relay and upper computer control system；Protection system includes sky
Air cock；Electric energy meter checking device includes computer, signal source, program controled power source, standard electric energy meter and error processor, verification
The each intermodule in device inside adopts RS-485 bus forms, and by signal source each module work is uniformly controlled；Electric energy meter checking device
Communication between host computer adopts RS232 interfaces, and by PC control calibration equipment calibration work is carried out, while completing to miss
Difference is gathered, judged, changing whole, storage and printing.
2. intelligent electric energy meter as claimed in claim 1 is monitored on-line and tele-control system, it is characterised in that：Described signal
Source includes programmable digital logic array CPLD chips, single-chip microprocessor MCU and D/A chips；MCU is on request by sine wave fundamental wave or folded
Plus harmonic value carry out being stored in after Digital Discrete in RAM, frequency reference generator will be stored in RAM just by calculator
String ripple digital quantity is input into D/A converter, respectively obtains the digit synthesis sinusoidal signal with certain phase relation with each other, then
Through active low-pass filter, become voltage and current signal of the distortion factor less than 0.2%, as the signal input of voltage and current
To power amplifier；The amplitude of signal source is adjusted and adopts 16 D/A converters, makes fineness adjustment be less than 0.01% full scale.
3. intelligent electric energy meter as claimed in claim 1 is monitored on-line and tele-control system, it is characterised in that：Signal source is produced
Voltage and current standard sine signal, respectively voltage power amplifier and current amplification are sent to by respective feedback compensation adjustment circuit
Power amplification is carried out, the sinusoidal signal of amplification is sent to calibrated meter and standard electric energy meter Jing after voltage output transformer transformation, amplified
Sinusoidal current signal exported by the current output terminal of device after rising current transformer up-flow, concatenation standard scale and each by school
Current lifting device is returned to after table current coil；Output voltage, current signal Jing electric currents, Voltage Feedback sampling mutual inductor sample, feed back to
The feedback compensation adjustment circuit of power amplifier prime；If device produces alarm signal feeds back to signal source, by signal source stop signal
Output, and make alarm.
4. intelligent electric energy meter as claimed in claim 1 is monitored on-line and tele-control system, it is characterised in that：Standard electric energy meter
Tested voltage and current is sampled Jing after respective A/D analog-digital converters, DSP digital processing systems are sent to respectively, DSP does in real time
U, I computing, obtains actual power P, angle, power factor etc., and by P the high-frequency impulse that frequency generator produces ratio and P is controlled
Output, the pulse is electric energy high impulse, is used when obtaining electric energy low-frequency pulse for standard verification table by frequency divider, high and low frequency electricity
Energy impulse output carries out real-time communication to interface, single-chip microcomputer and DSP, by liquid crystal display measured value.
5. intelligent electric energy meter as claimed in claim 1 is monitored on-line and tele-control system, it is characterised in that：In standard scale and
All in the case of continuous operation, the high-frequency pulse signal of standard scale sends into error processor to tested table, when calibrated meter has turned one
When determining umber of pulse, error processor reads the high-frequency impulse number of the standard scale added up in this period as actual measurement high-frequency impulse number
M, then with preset high-frequency impulse number m0Compare.
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| CN201611186248.7A CN106646333A (en) | 2016-12-21 | 2016-12-21 | Intelligent electric energy meter on-line monitoring and remote control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611186248.7A CN106646333A (en) | 2016-12-21 | 2016-12-21 | Intelligent electric energy meter on-line monitoring and remote control system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677982A (en) * | 2017-09-26 | 2018-02-09 | 国家电网公司 | A kind of digitalized electrical energy meter on-site calibrating method and device |
| CN108375748A (en) * | 2018-01-30 | 2018-08-07 | 电子科技大学 | A kind of gamma correction method based on sinusoidal excitation and DFT transform |
| CN109597580A (en) * | 2018-12-03 | 2019-04-09 | 烟台东方威思顿电气有限公司 | Flash operating method suitable for the storage of intelligent electric meter load curve |
| CN110531302A (en) * | 2019-08-27 | 2019-12-03 | 哈尔滨理工大学 | Intelligent electric energy meter failure mechanism and condition monitoring system and method |
| CN112230180A (en) * | 2020-09-27 | 2021-01-15 | 青岛鼎信通讯股份有限公司 | Signal source phase modulation method of electric energy meter calibrating device based on FPGA |
-
2016
- 2016-12-21 CN CN201611186248.7A patent/CN106646333A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677982A (en) * | 2017-09-26 | 2018-02-09 | 国家电网公司 | A kind of digitalized electrical energy meter on-site calibrating method and device |
| CN108375748A (en) * | 2018-01-30 | 2018-08-07 | 电子科技大学 | A kind of gamma correction method based on sinusoidal excitation and DFT transform |
| CN109597580A (en) * | 2018-12-03 | 2019-04-09 | 烟台东方威思顿电气有限公司 | Flash operating method suitable for the storage of intelligent electric meter load curve |
| CN109597580B (en) * | 2018-12-03 | 2021-10-29 | 烟台东方威思顿电气有限公司 | Flash operation method suitable for intelligent electric meter load curve storage |
| CN110531302A (en) * | 2019-08-27 | 2019-12-03 | 哈尔滨理工大学 | Intelligent electric energy meter failure mechanism and condition monitoring system and method |
| CN112230180A (en) * | 2020-09-27 | 2021-01-15 | 青岛鼎信通讯股份有限公司 | Signal source phase modulation method of electric energy meter calibrating device based on FPGA |
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Address after: 264003 Laishan City, Yantai province Venture Center, Shandong Applicant after: Yantai Dongfang Wisdom Electric Co., Ltd. Address before: 264003 Laishan City, Yantai province Venture Center, Shandong Applicant before: Yantai Dongfang Wisdom Electronic Co., Ltd. |
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Application publication date: 20170510 |