CN103809152A - Error transferring method of digital electric energy meter - Google Patents
Error transferring method of digital electric energy meter Download PDFInfo
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- CN103809152A CN103809152A CN201410057107.XA CN201410057107A CN103809152A CN 103809152 A CN103809152 A CN 103809152A CN 201410057107 A CN201410057107 A CN 201410057107A CN 103809152 A CN103809152 A CN 103809152A
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Abstract
The invention discloses an error transferring method of a digital electric energy meter. An error transferring device comprises an electric energy meter verification power supply which is used for outputting three-phase alternating current voltage and three-phase alternating current, a standard electric energy meter and an electric energy pulse error comparator and further comprises a signal acquisition module, an A/D conversion module and a personal computer or a microcomputer with an interface circuit. The error transferring device and the transmitted digital electric energy meter make up a downward error transferring system which is used for completing or realizing the error transferring method of the digital electric energy meter. The error transferring method of the digital electric energy meter is complete and rigorous in design concept, is reasonable in equipment structure, is convenient and easy to operate and is practical; the error transferring method is the independent innovation achievement of the digital electric energy measuring field, makes developments and contributions to improve the precision and the modernization level of the electric energy measurement of China and build a new digital electric energy measuring system, and is worthy of using and promotion.
Description
Technical field
A kind of propagation of error method that the present invention relates to digital electric energy meter, belongs to 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.
Background technology
For adapting to the needs of electric power digitalization development, the digitalized electrical system based on communication protocols such as IEC61850 has obtained increasing application.Corresponding totally digitilized electric energy metered system also arises at the historic moment therewith.The core of total digitalization electric energy metered system is totally digitilized electric energy meter.The maximum difference of this electric energy meter and mechanical type or electronic electric energy meter is that it measures analog voltage and analog current that input signal is no longer, but the data stream of total digitalization.Because this novel digital electric energy meter inside does not have analog to digital conversion error, thereby improve electric energy metrical precision.But China there is no ripe totally digitilized electric energy meter calibration standard and propagation of error system at present.And due to electric energy metrical accurately whether, be directly connected to send out, for, electricity consumption tripartite'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.
Summary of the invention
Object: in order to overcome the deficiencies in the prior art, the invention provides a kind of propagation of error method of digital electric energy meter.
Technical scheme: for solving the problems of the technologies described above, the technical solution used in the present invention is:
A kind of propagation of error method of digital electric energy meter, adopt the propagation of error device of digital electric energy meter to realize, described propagation of error device comprises electric energy meter calibration power supply, standard electric energy meter, the electrical energy pulse error comparator of output three-phase alternating voltage and three-phase alternating current, it is characterized in that, described standard electric energy meter comprises signal acquisition module, A/D modular converter, microcomputer or micro computer with interface circuit, 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 is connected with the input of A/D modular converter, the output of A/D modular converter is connected with microcomputer or micro computer, the three-phase alternating voltage gathering and three-phase alternating current signal are through signal acquisition module collection, A/D modular converter changes and pass through microcomputer or micro computer calculates, the metering of finishing dealing with to energy information, microcomputer or micro computer meet the digital stream that comprises voltage and current information of communications standard-specific stipulations and the electrical energy pulse that precision equates completely with it by its interface circuit output, export electrical energy pulse to electrical energy pulse error comparator by its interface circuit, the digital stream that comprises voltage and current information that simultaneously meets communications standard-specific stipulations by its interface circuit output is to the digital electric energy meter being passed, the digital electric energy meter being passed receives the defeated next digital stream that comprises voltage and current information that meets communications standard-specific stipulations of standard electric energy meter and calculates through self, process, output is passed electrical energy pulse to electrical energy pulse error comparator, through electrical energy pulse error comparator, two electrical energy pulses are compared, draw the difference of the electric energy that the electric energy that standard electric energy meter measures and the digital electric energy meter being passed measure, draw the digital electric energy meter error amount being passed, realize or complete the standard electric energy meter of propagation of error device to the error going down of the digital electric energy meter being passed.
The propagation of error method of described digital electric energy meter, is characterized in that: described communications standard-specific stipulations are: IEC61850-9-1; IEC61850-9-2; SERCOS III; MODBUS/TCP; One in MODBUS.
The propagation of error method of described digital electric energy meter, is characterized in that: described signal acquisition module is resitstance voltage divider, current diverter; Or, instrument voltage transformer, instrument current transformer; Or, resitstance voltage divider, instrument current transformer.
The propagation of error method of described digital electric energy meter, is characterized in that: described A/D modular converter is AD1674 or ADS7813 or AD7663.
The propagation of error method of described digital electric energy meter, is characterized in that: described microcomputer or micro computer are single-chip microcomputer, DSP, FPGA.
The propagation of error method of described digital electric energy meter, is characterized in that: the described digital electric energy meter being passed is: meet IEC61850-9-1 communication protocol digital electricity meter, meet IEC61850-9-2 communication protocol digital electricity meter, meet SERCOS III communication protocol digital electricity meter, one of meet in the digital electricity meter of MODBUS/TCP communication protocol.
Beneficial effect: the propagation of error method of digital electric energy meter provided by the invention, design concept is complete, design theory is rigorous, device structure is reasonable, practicality convenient and simple for operation, it is the autonomous innovation achievement of digitalized electric energy metering field, for promoting order of accuarcy, the modernization level of China electric energy metrical, the new system of setting up digitalized electric energy metering develops and contribute, be worth adopting and promoting; The propagation of error method that can include the digital electric energy meter in 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, the innovation research and the universalness that measure for the digitalized electric energy of China advance, to economic interests and the social equity, just sending out, bring for, electricity consumption tripartite's electric energy supply and demand, all significant.
Accompanying drawing explanation
Fig. 1 is the structural representation of the propagation of error device of digital electric energy meter in the present invention;
Fig. 2 is Plays electric energy meter structure block scheme of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
A kind of propagation of error method of digital electric energy meter, adopt the propagation of error device of digital electric energy meter to realize, as shown in Figure 1, described propagation of error device comprises electric energy meter calibration power supply, standard electric energy meter, the electrical energy pulse error comparator of output three-phase alternating voltage and three-phase alternating current; It is characterized in that, as shown in Figure 2.Described standard electric energy meter comprises signal acquisition module, A/D modular converter, microcomputer or micro computer with interface circuit, 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 is connected with the input of A/D modular converter, the output of A/D modular converter is connected with microcomputer or micro computer, the three-phase alternating voltage gathering and three-phase alternating current signal are through signal acquisition module collection, A/D modular converter changes and pass through microcomputer or micro computer calculates, the metering of finishing dealing with to energy information, microcomputer or micro computer meet the digital stream that comprises voltage and current information of communications standard-specific stipulations and the electrical energy pulse that precision equates completely with it by its interface circuit output, export electrical energy pulse to electrical energy pulse error comparator by its interface circuit, the digital stream that comprises voltage and current information that simultaneously meets communications standard-specific stipulations by its interface circuit output is to the digital electric energy meter being passed, the digital electric energy meter being passed receives the defeated next digital stream that comprises voltage and current information that meets communications standard-specific stipulations of standard electric energy meter and calculates through self, process, output is passed electrical energy pulse to electrical energy pulse error comparator, through electrical energy pulse error comparator, two electrical energy pulses are compared, draw the difference of the electric energy that the electric energy that standard electric energy meter measures and the digital electric energy meter being passed measure, draw the digital electric energy meter error amount being passed, realize or complete the standard electric energy meter of propagation of error device to the error going down of the digital electric energy meter being passed.
Microcomputer or micro computer are exported the electrical energy pulse being strictly directly proportional to power input with interface circuit and from this interface circuit, also output meets the digital stream that comprises voltage and current information of communications standard-specific stipulations.Visible, the data stream of exporting by interface circuit due to microcomputer or micro computer completes in analog to digital conversion rear end, thus the information such as three-phase voltage and electric current comprising in data stream and standard electric energy meter to calculate three-phase voltage and current information used for pulse output be identical.Conventionally, pulse output error is very little, can ignore, and the electrical energy pulse output accuracy of standard electric energy meter equates with the three-phase voltage comprising in its digital stream and the precision of electric current.Described 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. exportable three-phase alternating voltage and the electric energy meter calibration power supply of three-phase alternating current; 2. the lower-powered three-phase alternating-current supply of exportable three-phase alternating voltage and three-phase alternating current, as long as the output power of this power supply can drive standard electric energy meter.Described 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.SERCOS III; 4.MODBUS/TCP; 5.MODBUS; Etc..The described digital stream that comprises voltage and current information refers to: meet communications standard-specific stipulations, again comprise voltage and current digital information flow.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 is as 80C51, LPC2458 etc.; 2.DSP: model is as TMS320C32, TMS320C6712 etc.; 3.FPGA: model is as XC3S250E, AGL250FGG144I etc.; The described digital electric energy meter concrete structure being passed is in this way: 1. meet the digital electricity meter of IEC61850-9-1 communication protocol, 2. meet the digital electricity meter of IEC61850-9-2 communication protocol, 3. meet the digital electricity meter of SERCOS III communication protocol, 4. meet the digital electricity meter of MODBUS/TCP communication protocol etc.The described implication that meets digital stream communications standard-specific stipulations, that comprise voltage and current information as already pointed out, all no longer repeats.
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 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, the innovation research and the universalness that measure for the digitalized electric energy of China advance, to economic interests and the social equity, just sending out, bring for, electricity consumption tripartite's electric energy supply and demand, 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.
Embodiment mono-. the propagation of error method of digital electric energy meter
The propagation of error method of this routine digital electric energy meter adopts the propagation of error device 1 of digital electric energy meter to complete or realize, adopt the standard electric energy meter 3 of the propagation of error device 1 of digital electric energy meter to go or realized with the digital electric energy meter 8 being passed, also adopt the propagation of error system of digital electric energy meter to go or realized.The propagation of error system concrete structure of this routine digital electric energy meter is combined and is illustrated by Fig. 1～Fig. 2, shown in Fig. 1 is the propagation of error system architecture schematic diagram of this example digital electric energy meter, as shown in Figure 1, this routine digital electric energy meter propagation of error system is made up of the propagation of error device of digital electric energy meter and the digital electric energy meter being passed, and above-mentioned both form the error going down system of a digital electric energy meter.The propagation of error device 1 of this routine digital electric energy meter by output three-phase alternating voltage and the electric energy meter calibration power supply of three-phase alternating current, electrical energy pulse error comparator, not only with three-phase alternating voltage and three-phase alternating current input interface but also with standard electric energy meter three parts and the system software of the digital stream output interface that comprises voltage and current information that meets communications standard-specific stipulations, or also have housing composition.The output three-phase alternating voltage of this example and the electric energy meter calibration power supply of three-phase alternating current, the signal of its output three-phase alternating voltage and three-phase alternating current is analog quantity, and this three-phase alternating-current supply is as the electric energy meter calibration power supply of the exportable three-phase alternating voltage that is and three-phase alternating current.The signal of electrical energy pulse comparer 4 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.SERCOS III; 4.MODBUS/TCP; 5.MODBUS; Etc..The standard digital stream that comprises voltage and current information of this example refers to: meet communications standard-specific stipulations, again comprise voltage and current information digital information flow.The accredited digital electric energy meter 8 of this example meets the digital electricity meter of IEC61850-9-1 communication protocol etc. in this way.The propagation of error method of this routine digital electric energy meter: according to the three-phase alternating voltage of electric energy meter calibration power supply output and the electric energy of three-phase alternating current signal measurement standard electric energy meter, measure the electric energy of the digital electric energy meter being passed according to the digital stream that comprises voltage and current information that meets communications standard-specific stipulations of standard electric energy meter output, and by the electrical energy pulse input electrical energy pulse error comparator of each self-measuring, to two electrical energy pulse comparisons of input, draw the digital electricity meter electric energy metering error being passed, realize being passed the error going down of digital electric energy meter.The standard electric energy meter of the propagation of error device 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 output, calculate through self, process, output meets the digital stream that comprises voltage and current information of communications standard-specific stipulations and the electrical energy pulse that precision equates completely with it, and the digital stream that comprises voltage and current information that meets communications standard-specific stipulations by its digital interface circuit output is to the digital electricity meter being passed, export electrical energy pulse to electrical energy pulse error comparator by its pulse interface circuit simultaneously, the digital electric energy meter being passed 8 of described employing receives the defeated next digital stream that comprises voltage and current information that meets communications standard-specific stipulations of standard electric energy meter and calculates through self, process, export accredited electrical energy pulse to electrical energy pulse error comparator, process electrical energy pulse error comparator is to two electrical energy pulse comparisons, 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 being passed measure, draw the error magnitude of the digital electric energy meter being passed, the error magnitude going down of the standard electric energy meter of propagation of error device of realizing or complete digital electric energy meter to the digital electric energy meter 8 being passed.Shown in Fig. 2 is standard electric energy meter block diagram, and this routine standard electric energy meter 3 is made up of signal acquisition module, A/D modular converter, interface circuit, Instrument shell and the panel etc. of microcomputer or micro computer and software system management control thereof.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 gathering and three-phase alternating current signal are through signal acquisition module collection, A/D modular converter changes and pass through microcomputer or micro computer 7 calculates, the metering of finishing dealing with to energy information, microcomputer or micro computer are exported the electrical energy pulse being strictly directly proportional to power input with interface circuit and from this interface circuit, also output meets the digital stream that comprises voltage and current information of communications standard-specific stipulations.Microcomputer or micro computer are exported the electrical energy pulse being strictly directly proportional to power input with electrical energy pulse interface circuit and from this interface circuit, also export the digital stream that comprises voltage and current information that meets communications standard-specific stipulations with digital interface circuit and from this interface circuit.Visible, because the digital stream of exporting by interface completes in analog to digital conversion rear end, thereby three-phase voltage and current information that the information such as three-phase voltage and electric current comprising in digital stream and standard electric energy meter 3 calculate use for pulse output are identical.Conventionally, pulse output error is very little, can ignore, and the pulse output accuracy of standard electric energy meter equates with the three-phase voltage comprising in its normal data stream and the precision of electric current.Signal acquisition module 5 resitstance voltage divider or the current diverter etc. in this way that this is routine.This routine A/D modular converter model is AD1674 etc. in this way.The microcomputer that this is routine or micro computer single-chip microcomputer in this way: model is as 80C51, LPC2458 etc.The propagation of error method of this digital electric energy meter is adopt the propagation of error device of digital electric energy meter and standard electric energy meter to go or realize calibrating for error or going down of digital electric energy meter to being passed.
Embodiment bis-. 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 complete or realize, the propagation of error method difference of the propagation of error method of this routine digital electric energy meter and the digital electric energy meter of embodiment mono-has: 1. this routine electric energy meter calibration power supply 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 being passed of this example meets the digital electricity meter of IEC61850-9-2 communication protocol etc. in this way.3. this routine signal acquisition module instrument voltage transformer or instrument current transformer etc. in this way.4. this routine A/D modular converter model ADS7813 etc. in this way.5. this routine microcomputer or micro computer DSP in this way: model is as TMS320C32, TMS320C6712 etc.The implication of the content that meets communications standard-specific stipulations of this example and the digital stream that comprises voltage and current information as already pointed out, no longer repeats.All the other do not state the propagation of error method of this routine digital electric energy meter, are entirely same as described in embodiment mono-, no longer repeat.
Embodiment tri-. the propagation of error method of digital electric energy meter
The propagation of error method of this routine digital electric energy meter adopts the propagation of error system of digital electric energy meter to complete or realize, and the propagation of error system concrete structure of this routine digital electric energy meter is combined and illustrated by Fig. 1～Fig. 2.The propagation of error method difference of the digital electric energy meter of the propagation of error method of this routine digital electric energy meter and embodiment mono-, embodiment bis-has: 1. the digital electric energy meter being passed of this example meets the digital electricity meter of SERCOS III communication protocol etc. in this way.2. this routine signal acquisition module 5 resitstance voltage divider or instrument current transformer etc. in this way.3. this routine A/D modular converter model AD7663 etc. in this way.4. this routine microcomputer or micro computer FPGA in this way: model is as XC3S250E, AGL250FGG144I etc.All the other do not state the propagation of error method of this routine digital electric energy meter, are entirely same as described in embodiment mono-, embodiment bis-, no longer repeat.
Embodiment tetra-. the propagation of error method of digital electric energy meter
The propagation of error method of this routine digital electric energy meter adopts the propagation of error system of digital electric energy meter to complete or realize, and the propagation of error system concrete structure of this routine digital electric energy meter is combined and illustrated by Fig. 1～Fig. 2.The propagation of error method difference of the propagation of error method of this routine digital electric energy meter and the digital electric energy meter of embodiment mono-～embodiment tri-has: 1. the digital electric energy meter being passed of this example meets the digital electricity meter of MODBUS/TCP communication protocol etc. in this way.All the other do not state the propagation of error method of this routine digital electric energy meter, are entirely same as described in embodiment mono-～embodiment tri-, no longer repeat.
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 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, the innovation research and the universalness that measure for the digitalized electric energy of China advance, to economic interests and the social equity, just sending out, bring for, electricity consumption tripartite's electric energy supply and demand, 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.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. the propagation of error method of a digital electric energy meter, adopt the propagation of error device of digital electric energy meter to realize, described propagation of error device comprises electric energy meter calibration power supply, standard electric energy meter, the electrical energy pulse error comparator of output three-phase alternating voltage and three-phase alternating current, it is characterized in that, described standard electric energy meter comprises signal acquisition module, A/D modular converter, microcomputer or micro computer with interface circuit, 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 is connected with the input of A/D modular converter, the output of A/D modular converter is connected with microcomputer or micro computer, the three-phase alternating voltage gathering and three-phase alternating current signal are through signal acquisition module collection, A/D modular converter changes and pass through microcomputer or micro computer calculates, the metering of finishing dealing with to energy information, microcomputer or micro computer meet the digital stream that comprises voltage and current information of communications standard-specific stipulations and the electrical energy pulse that precision equates completely with it by its interface circuit output, export electrical energy pulse to electrical energy pulse error comparator by its interface circuit, the digital stream that comprises voltage and current information that simultaneously meets communications standard-specific stipulations by its interface circuit output is to the digital electric energy meter being passed, the digital electric energy meter being passed receives the defeated next digital stream that comprises voltage and current information that meets communications standard-specific stipulations of standard electric energy meter and calculates through self, process, output is passed electrical energy pulse to electrical energy pulse error comparator, through electrical energy pulse error comparator, two electrical energy pulses are compared, draw the difference of the electric energy that the electric energy that standard electric energy meter measures and the digital electric energy meter being passed measure, draw the digital electric energy meter error amount being passed, realize or complete the standard electric energy meter of propagation of error device to the error going down of the digital electric energy meter being passed.
2. the propagation of error method of digital electric energy meter according to claim 1, is characterized in that: described communications standard-specific stipulations are: IEC61850-9-1; IEC61850-9-2; SERCOS III; MODBUS/TCP; One in MODBUS.
3. the propagation of error method of digital electric energy meter according to claim 1, is characterized in that: described signal acquisition module is resitstance voltage divider, current diverter; Or, instrument voltage transformer, instrument current transformer; Or, resitstance voltage divider, instrument current transformer.
4. the propagation of error method of digital electric energy meter according to claim 1, is characterized in that: described A/D modular converter is AD1674 or ADS7813 or AD7663.
5. the propagation of error method of digital electric energy meter according to claim 1, is characterized in that: described microcomputer or micro computer are single-chip microcomputer, DSP, FPGA.
6. the propagation of error method of digital electric energy meter according to claim 1, is characterized in that: the described digital electric energy meter being passed is: meet IEC61850-9-1 communication protocol digital electricity meter, meet IEC61850-9-2 communication protocol digital electricity meter, meet SERCOS III communication protocol digital electricity meter, one of meet in the digital electricity meter of MODBUS/TCP communication protocol.
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| CN105093165A (en) * | 2015-09-08 | 2015-11-25 | 国家电网公司 | Comprehensive test method of pulse signals of digitization electric energy meter |
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Application publication date: 20140521 |