CN103018707A - Error propagation method for digital electric energy meter - Google Patents
Error propagation method for digital electric energy meter Download PDFInfo
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- CN103018707A CN103018707A CN2012105281464A CN201210528146A CN103018707A CN 103018707 A CN103018707 A CN 103018707A CN 2012105281464 A CN2012105281464 A CN 2012105281464A CN 201210528146 A CN201210528146 A CN 201210528146A CN 103018707 A CN103018707 A CN 103018707A
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Abstract
The invention discloses an error propagation method for a digital electric energy meter, and belongs to the field of digital electric energy meter error metering. A propagation device is composed of a three-phase alternating current verification power supply, an electric pulse error comparator and a standard electric energy meter. The standard electric energy meter is composed of a microcomputer and a signal acquisition module, an analogue/digital conversion block, an interface circuit and the like which are managed and controlled by a software system. The propagation device and the transmitted digital electric energy meter form an error downward propagation system to complete or achieve the error propagation method of the digital electric energy meter. By means of the technical scheme, the design philosophy is complete, the design theory is rigorous, the device structure is reasonable, the operation is convenient, and the digital electric energy meter is simple and practical; and the error propagation method for the digital electric energy meter is an independent innovation in the digital electric energy metering, develops and contributes to the improvement of the accuracy degree and the modernization level and the establishment of a novel system of digital electric energy metering, and is worth using and popularizing.
Description
One. technical field
The propagation of error method of digital electric energy meter disclosed by the invention belongs to the electric energy meter error field of measuring techniques, is specifically related to a kind of technology contents of propagation of error method of digital electric energy meter.
Two. background technology
The needs that be to adapt to the electric power digital development have obtained increasing application based on the digitalized electrical system of the communication protocols such as IEC61850.Corresponding totally digitilized electric energy metered system also arises at the historic moment therewith.The core of total digitalization electric energy metered system is the electric energy meter of total digitalization.The maximum difference of this electric energy meter and traditional mechanical type or electronic electric energy meter is that its measurement input signal no longer is traditional aanalogvoltage and analog current, but the data stream of total digitalization.Because this novel digital electric energy meter inside does not have the analog to digital conversion error, thereby has improved the electric energy metrical precision.But China there is no electric energy meter calibration standard and the propagation of error system of ripe total digitalization at present.And since electric energy metrical accurately whether, be directly connected to send out, for, electricity consumption three parts's economic interests and social equity, just.Therefore, the error magnitude transmission method of inventing a kind of new digital electric energy meter is very urgent and necessary.
Three. summary of the invention
The object of the invention is to: the propagation of error method that can include the digital electric energy meter in the national existing electric energy metering error transport system in is provided to society.This is for the order of accuarcy and the modernization level that promote China's electric energy metrical, innovation research and universalness for the metering of the digitalized electric energy of China advance, to send out, for economic interests and social equity, just that, electricity consumption three parts's electric energy supply and demand are brought, all significant.
The propagation of error method and technology scheme of digital electric energy meter of the present invention is as follows: the propagation of error method of this digital electric energy meter, the propagation of error system of employing digital electric energy meter finishes or realizes, also namely adopt the standard electric energy meter of propagation of error device of digital electric energy meter and the digital electric energy meter that is passed to finish or realize, the propagation of error device of described digital electric energy meter is by traditional output three-phase alternating voltage and the electric energy meter calibration power supply of three-phase alternating current, traditional electrical energy pulse error comparator, not only formed with traditional three-phase alternating voltage and three-phase alternating current input interface but also with standard electric energy meter three parts of the digital stream output interface that comprises voltage and current information that meets the communications standard-specific stipulations, technical characterstic is: described standard electric energy meter is by the signal acquisition module of microcomputer or micro computer and software system management control thereof, the A/D modular converter, interface circuit forms, wherein signal acquisition module is with three-phase alternating voltage Ua, Ub, Uc and three-phase alternating current Ia, Ib, the input interface circuit of Ic, signal acquisition module output connects with the input of A/D modular converter, the output of A/D modular converter connects with microcomputer or micro computer, the three-phase alternating voltage that gathers and three-phase alternating current signal are through the signal acquisition module collection, the conversion of A/D modular converter and process microcomputer or micro computer calculate, finish dealing with to the metering of energy information, microcomputer or micro computer are with interface circuit and from the electrical energy pulse that this interface circuit is exported and power input strictly is directly proportional, and also output meets the digital stream that comprises voltage and current information of communications standard-specific stipulations.As seen, because microcomputer or micro computer are finished in the analog to digital conversion rear end by the data stream of interface circuit output, thus the information such as the three-phase voltage that comprises in the data stream and electric current to be used for pulse output calculating used three-phase voltage and current information with standard electric energy meter be identical.Usually, pulse output error is very little, can ignore, and the three-phase voltage that then comprises in the electrical energy pulse output accuracy of standard electric energy meter and its digital stream and the precision of electric current equate.Described traditional output three-phase alternating voltage and the electric energy meter calibration power supply of three-phase alternating current, signal of its output three-phase alternating voltage and three-phase alternating current is analog quantity, three-phase alternating-current supply in this way: 1. the electric energy meter calibration power supply of traditional exportable three-phase alternating voltage and three-phase alternating current; 2. the lower-powered three-phase alternating-current supply of exportable three-phase alternating voltage and three-phase alternating current is as long as the output power of this power supply can drive standard electric energy meter.Described traditional electrical energy pulse comparer, the signal of this electrical energy pulse comparer is digit pulse.Described communications standard-specific stipulations include but not limited to as follows: 1.IEC61850-9-1; 2.IEC61850-9-2; 3.SERCOSIII; 4.MODBUS/TCP; 5.MODBUS; Etc..The described digital stream that comprises voltage and current information refers to: meet the communications standard-specific stipulations, comprise the digital information flow of voltage and current again.Described signal acquisition module is in this way: 1. resitstance voltage divider, current diverter; 2. instrument voltage transformer, instrument current transformer; 3. resitstance voltage divider, instrument current transformer etc.Described A/D modular converter model is in this way: 1.AD1674; 2.ADS7813; 3.AD7663 etc.Described microcomputer or micro computer be in this way: 1. single-chip microcomputer: model such as 80C51, LPC2458 etc.; 2.DSP: model such as TMS320C32, TMS320C6712 etc.; 3.FPGA: model such as XC3S250E, AGL250FGG144I etc.; The described digital electric energy meter concrete structure that is passed is in this way: 1. satisfy the digital electricity meter of IEC61850-9-1 communication protocol, 2. satisfy the digital electricity meter of IEC61850-9-2 communication protocol, 3. satisfy the digital electricity meter of SERCOSIII communication protocol, 4. satisfy the digital electricity meter etc. of MODBUS/TCP communication protocol.The described implication that meets the digital stream communications standard-specific stipulations, that comprise voltage and current information all no longer repeats as already pointed out.
The technical scheme advantage of the propagation of error method of digital electric energy meter of the present invention has: 1. the propagation of error method of technical scheme digital electric energy meter of the present invention more intactly provides a kind of propagation of error method of including the digital electric energy meter in the national existing electric energy metering error transport system in.This realizes as early as possible for China or universal electric energy metrical numeral has turned place mat, preparation and contribution into; 2. the technical scheme of the propagation of error method of digital electric energy meter of the present invention, China realize as early as possible or the digitized demand of universal electric energy metrical under digitalized electric energy metering system arise at the historic moment, this digitalized electric energy metering system is the autonomous innovation achievement of China's electric energy metrical digital area, for promoting order of accuarcy and the modernization level of China's electric energy metrical, innovation research and universalness for the metering of the digitalized electric energy of China advance, to send out, for economic interests and social equity, just that, electricity consumption three parts's electric energy supply and demand are brought, all significant; 3. the Technical Design theory of the propagation of error method of digital electric energy meter of the present invention is completely attained, design theory is rigorous, device structure is reasonable, practicality convenient and simple for operation.The propagation of error method of digital electric energy meter of the present invention is worth adopting and promoting.
Figure of description of the present invention has 3 width of cloth:
Fig. 1 is the propagation of error apparatus structure schematic diagram of digital electric energy meter;
Fig. 2 is the standard electric energy meter block diagram;
Fig. 3 is the propagation of error system architecture schematic diagram that the propagation of error method of digital electric energy meter adopts.
Adopted unified label in each figure, namely same object is used same label in each figure.In each figure: 1. the propagation of error device of digital electric energy meter; 2. the electric energy meter calibration power supply of three-phase; 3. modulus type standard electric energy meter; 4. electrical energy pulse error comparator; 5. signal acquisition module; 6.A/D modular converter; 7. microcomputer or micro computer; 8. the digital electric energy meter that is passed.
Four. description of drawings
Five. embodiment
The propagation of error method non-limiting examples of digital electric energy meter of the present invention is as follows:
Embodiment one. the propagation of error method of digital electric energy meter
The propagation of error device 1 of the propagation of error method employing digital electric energy meter of the digital electric energy meter that this is routine is finished or is realized, namely adopt the standard electric energy meter 3 of the propagation of error device 1 of digital electric energy meter to go to finish or realize with the digital electric energy meter 8 that is passed, also namely adopt the propagation of error system of digital electric energy meter to go to finish or realize.The propagation of error system concrete structure of the digital electric energy meter that this is routine is united by Fig. 1～Fig. 3 and is illustrated, shown in Figure 3 is the propagation of error system architecture schematic diagram of this example digital electric energy meter, as shown in Figure 3, this routine digital electric energy meter propagation of error system is comprised of with the digital electric energy meter 8 that is passed the propagation of error device 1 of digital electric energy meter, and above-mentioned both consist of the error going down system of a digital electric energy meter.The propagation of error device 1 of the digital electric energy meter that this is routine is illustrated by Fig. 1, this transfer device 1 is by the electric energy meter calibration power supply 2 of traditional output three-phase alternating voltage and three-phase alternating current, traditional electrical energy pulse error comparator 4, not only with traditional three-phase alternating voltage and three-phase alternating current input interface but also with standard electric energy meter 3 three parts and the system software of the digital stream output interface that comprises voltage and current information that meets the communications standard-specific stipulations, or also has housing to form.The output three-phase alternating voltage that this example is traditional and the electric energy meter calibration power supply 2 of three-phase alternating current, signal of its output three-phase alternating voltage and three-phase alternating current is analog quantity, and this three-phase alternating-current supply 2 is traditional exportable three-phase alternating voltage and the electric energy meter calibration power supply of three-phase alternating current in this way.The signal of the electrical energy pulse comparer 4 that this example is traditional is digit pulses.These routine communications standard-specific stipulations include but not limited to as follows: 1.IEC61850-9-1; 2.IEC61850-9-2; 3.SERCOSIII; 4.MODBUS/TCP; 5.MODBUS; Etc..The standard digital stream that comprises voltage and current information of this example refers to: meet the communications standard-specific stipulations, comprise the digital information flow of voltage and current information again.The accredited digital electric energy meter 8 of this example satisfies the digital electricity meter of IEC61850-9-1 communication protocol etc. in this way.The propagation of error method of the digital electric energy meter that this is routine: according to the three-phase alternating voltage of electric energy meter calibration power supply 2 outputs and the electric energy of three-phase alternating current signal measurement standard electric energy meter 3, measure the electric energy of the digital electric energy meter 8 that is passed according to the digital stream that comprises voltage and current information that meets the communications standard-specific stipulations of standard electric energy meter 3 outputs, and in the electrical energy pulse input electrical energy pulse error comparator 4 with each self-measuring, two electrical energy pulses to input compare, draw digital electricity meter 8 electric energy metering errors that are passed, realize being passed the error going down of digital electric energy meter 8.The standard electric energy meter 3 of the propagation of error device 1 of the digital electric energy meter of described employing is by three-phase alternating voltage and the three-phase alternating current signal of its interface circuit input electric energy meter calibration power supply 2 outputs, calculate through self, process, output meets the digital stream that comprises voltage and current information of communications standard-specific stipulations and the fully equal electrical energy pulse of precision with it, and meet the digital stream that comprises voltage and current information of communications standard-specific stipulations to the digital electricity meter 8 that is passed by the output of its digital interface circuit, export electrical energy pulse to electrical energy pulse error comparator 4 by its pulse interface circuit simultaneously, the digital electric energy meter that is passed 8 of described employing receives the standard electric energy meter 3 defeated next digital streams that comprise voltage and current information that meet the communications standard-specific stipulations and calculates through self, process, export accredited electrical energy pulse to electrical energy pulse error comparator 4, through 4 pairs of two electrical energy pulses of electrical energy pulse error comparator relatively, draw the difference of the electric energy that the electric energy that the standard electric energy meter 3 of the propagation of error device 1 of digital electric energy meter measures and the digital electric energy meter 8 that is passed measure, draw the error magnitude of the digital electric energy meter 8 that is passed, realize or finish the error magnitude going down of 3 pairs of digital electric energy meters that are passed 8 of standard electric energy meter of the propagation of error device 1 of digital electric energy meter.Shown in Figure 2 is standard electric energy meter 3 block diagram, and this routine standard electric energy meter 3 is comprised of signal acquisition module 5, A/D modular converter 6, interface circuit, Instrument shell and the panel etc. of microcomputer or micro computer 7 and software system management control thereof.Wherein signal acquisition module 5 is with three-phase alternating voltage Ua, Ub, Uc and three-phase alternating current Ia, Ib, the input interface circuit of Ic, signal acquisition module 5 outputs connect with the input of A/D modular converter 6, the output of A/D modular converter 6 connects with microcomputer or micro computer 7, the three-phase alternating voltage that gathers and three-phase alternating current signal gather through signal acquisition module 5,6 conversions of A/D modular converter and process microcomputer or micro computer 7 calculate, finish dealing with to the metering of energy information, microcomputer or micro computer 7 are with interface circuit and from the electrical energy pulse that this interface circuit is exported and power input strictly is directly proportional, and also output meets the digital stream that comprises voltage and current information of communications standard-specific stipulations.Microcomputer or micro computer 7 are also exported the digital stream that comprises voltage and current information that meets the communications standard-specific stipulations with the electrical energy pulse interface circuit and from the electrical energy pulse that this interface circuit is exported and power input strictly is directly proportional with digital interface circuit and from this interface circuit.As seen, owing to finish in the analog to digital conversion rear end by the digital stream of interface output, thereby the information such as the three-phase voltage that comprises in the digital stream and electric current are identical with three-phase voltage and the current information that standard electric energy meter 3 is used for pulse output calculating usefulness.Usually, pulse output error is very little, can ignore, and the three-phase voltage that then comprises in the pulse output accuracy of standard electric energy meter 3 and its normal data stream and the precision of electric current equate.This routine signal acquisition module 5 is resitstance voltage divider or current diverter etc. in this way.These routine A/D modular converter 6 models are AD1674 etc. in this way.The microcomputer that this is routine or micro computer 7 be single-chip microcomputer in this way: model such as 80C51, LPC2458 etc.The propagation of error method of this digital electric energy meter is to adopt the propagation of error device 1 of digital electric energy meter and standard electric energy meter 3 to go to finish or realize calibrating for error or going down to the digital electric energy meter 8 that is passed.
Embodiment two. the propagation of error method of digital electric energy meter
The propagation of error method of this digital electric energy meter of this example adopts the propagation of error system of digital electric energy meter to finish or realizes, the propagation of error system concrete structure of the digital electric energy meter that this is routine is united by Fig. 1～Fig. 3 and illustrated.The propagation of error method difference of the propagation of error method of the digital electric energy meter that this is routine and the digital electric energy meter of embodiment one has: 1. electric energy meter calibration power supply 2 that should example is lower-powered three-phase alternating-current supply in this way, as long as the output power of this power supply can drive standard electric energy meter.2. the digital electric energy meter that is passed 8 that should example satisfies digital electricity meter of IEC61850-9-2 communication protocol etc. in this way.3. signal acquisition module 5 that should example is instrument voltage transformer or instrument current transformer etc. in this way.4. A/D modular converter 6 models that should example are ADS7813 etc. in this way.5. microcomputer that should example or micro computer 7 be DSP in this way: model such as TMS320C32, TMS320C6712 etc.The content that meets the communications standard-specific stipulations of this example and comprise voltage and current information digital stream implication as already pointed out, no longer repeat.All the other do not state the propagation of error method of the digital electric energy meter that this is routine, entirely are same as described in the embodiment one, no longer repeat.
Embodiment three. the propagation of error method of digital electric energy meter
The propagation of error method of the digital electric energy meter that this is routine adopts the propagation of error system of digital electric energy meter to finish or realizes, the propagation of error system concrete structure of the digital electric energy meter that this is routine is united by Fig. 1～Fig. 3 and illustrated.The propagation of error method difference of the digital electric energy meter of the propagation of error method of the digital electric energy meter that this is routine and embodiment one, embodiment two has: 1. the digital electric energy meter that is passed 8 that should example satisfies digital electricity meter of SERCOSIII communication protocol etc. in this way.2. signal acquisition module 5 that should example is resitstance voltage divider or instrument current transformer etc. in this way.3. A/D modular converter 6 models that should example are AD7663 etc. in this way.4. microcomputer that should example or micro computer 7 be FPGA in this way: model such as XC3S250E, AGL250FGG144I etc.All the other do not state the propagation of error method of the digital electric energy meter that this is routine, entirely are same as described in embodiment one, the embodiment two, no longer repeat.
Embodiment four. the propagation of error method of digital electric energy meter
The propagation of error method of the digital electric energy meter that this is routine adopts the propagation of error system of digital electric energy meter to finish or realizes, the propagation of error system concrete structure of the digital electric energy meter that this is routine is united by Fig. 1～Fig. 3 and illustrated.The propagation of error method difference of the propagation of error method of the digital electric energy meter that this is routine and the digital electric energy meter of embodiment one～embodiment three has: 1. the digital electric energy meter that is passed 8 that should example satisfies digital electricity meter of MODBUS/TCP communication protocol etc. in this way.All the other do not state the propagation of error method of the digital electric energy meter that this is routine, entirely are same as described in embodiment one～embodiment three, no longer repeat.
Claims (1)
1. the propagation of error method of a digital electric energy meter, the propagation of error device of employing digital electric energy meter is finished or is realized, namely adopt the standard electric energy meter of propagation of error device of digital electric energy meter and the digital electric energy meter that is passed to finish or realize, the propagation of error device of described digital electric energy meter is by traditional output three-phase alternating voltage and the electric energy meter calibration power supply of three-phase alternating current, traditional electrical energy pulse error comparator, standard electric energy meter three parts form, be characterised in that: described standard electric energy meter is by the signal acquisition module of microcomputer or micro computer and software system management control thereof, the A/D modular converter, interface circuit forms, wherein signal acquisition module is with three-phase alternating voltage Ua, Ub, Uc and three-phase alternating current Ia, Ib, the input interface circuit of Ic, signal acquisition module output connects with the input of A/D modular converter, the output of A/D modular converter connects with microcomputer or micro computer, the three-phase alternating voltage that gathers and three-phase alternating current signal are through the signal acquisition module collection, the conversion of A/D modular converter and process microcomputer or micro computer calculate, finish dealing with to the metering of energy information, microcomputer or micro computer meet the digital stream that comprises voltage and current information of communications standard-specific stipulations and the fully equal electrical energy pulse of precision with it by the output of its interface circuit, export electrical energy pulse to the electrical energy pulse error comparator by its interface circuit, meet the digital stream that comprises voltage and current information of communications standard-specific stipulations to the digital electric energy meter that is passed by its interface circuit output simultaneously, the described digital electric energy meter that is passed receives the defeated next digital stream that comprises voltage and current information that meets the communications standard-specific stipulations of standard electric energy meter and calculates through self, process, output is passed electrical energy pulse to the electrical energy pulse error comparator, through the electrical energy pulse error comparator to two electrical energy pulses relatively, draw the difference of the electric energy that the electric energy that the standard electric energy meter of the propagation of error device of digital electric energy meter measures and the digital electric energy meter that is passed measure, draw the digital electric energy meter error amount that is passed, realize or the standard electric energy meter of propagation of error device of finishing digital electric energy meter to the error going down of the digital electric energy meter that is passed.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103499807A (en) * | 2013-10-10 | 2014-01-08 | 国家电网公司 | Checking device and method for eliminating truncation errors of digital electric energy meter |
| CN103809152A (en) * | 2014-02-20 | 2014-05-21 | 国家电网公司 | Error transferring method of digital electric energy meter |
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Application publication date: 20130403 |