CN105487043A - Metering accuracy simulation test system of digital electric energy meter - Google Patents
Metering accuracy simulation test system of digital electric energy meter Download PDFInfo
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- CN105487043A CN105487043A CN201610058315.0A CN201610058315A CN105487043A CN 105487043 A CN105487043 A CN 105487043A CN 201610058315 A CN201610058315 A CN 201610058315A CN 105487043 A CN105487043 A CN 105487043A
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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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Abstract
The invention discloses a metering accuracy simulation test system of a digital electric energy meter. The power factor (a cosine value of an included angle between a current phase and a voltage phase) of the whole simulation test system can be regulated by utilizing a phase shifter, and also voltage regulators are utilized to regulate the magnitude of currents to simulate different load situations. In this way, the simulation test system can simulate the on-site operating condition of a digital electric energy meter of an intelligent transformer station, and is capable of testing measurement accuracy of the digital electric energy meter by comparing a metering result of a standard electronic electric energy meter in an electric energy metering entire loop with the on-site operating condition, thus becoming a fully new digital electric energy meter reliability evaluation system. Moreover, the system can simulate and test measurement accuracy of the digital electric energy meter that runs for a long period of time. Therefore, an accurate conclusion obtained by the above mode can be better reproduced in long-term actual use, compared with a conclusion obtained by a mode that only utilizes discrete signal codes to test the accuracy of the digital electric energy meter.
Description
Technical field
The present invention relates to electric energy metrical field, is more specifically a kind of intelligent substation digital electric energy meter metering accuracy emulation test system.
Background technology
Along with intelligent substation puts into operation in a large number, electronic mutual inductor is widely applied, and the digital electric energy meter matched with electronic mutual inductor have also been obtained widespread use.Compared with traditional multifunctional electric energy meter, digital electric energy meter fully achieves the digital metering of electric flux, itself and switch communication, receive digital voltage signal, the digital current signal of the time synchronized of reporting and submitting from electronic mutual inductor, process is carried out to the digital signal received and completes gage work.Compared with conventional metered dose mode, digitally abandon metering secondary, on the spot by more aobvious for the metering method of signal digital superior.In theory, digital electric energy meter should be the composition error that effectively can reduce electric energy metered system, improves the accuracy of transformer station's measuring system.
Carried out the technical research of the method for calibration to digital electric energy meter both at home and abroad in recent years successively, target is and makes as far as possible, after certain verification, to obtain one more accurate check digit formula electric energy meter, and namely the accuracy of digital electric energy meter metering is very high.But use after existing mode verifies the many years of experience of digital electric energy meter show, existing digital electric energy meter in long-time running, under different operating mode, as under different capacity factor, under different current loading time, accuracy leaves a question open really.
By this, need the verification for digital electric energy meter measurement accuracy to carry out comprehensively deep research, make verify conclusion more closing to reality transformer station measure demand.
Summary of the invention
The invention provides a kind of digital electric energy meter metering accuracy emulation test system, with the problem that the accuracy solving digital electric energy meter of the prior art is not high.
In order to solve the problems of the technologies described above, the invention discloses following technical scheme:
A kind of digital electric energy meter metering accuracy emulation test system, standard current transformer, load optical current mutual inductor and/or load electricity current transformer that this system comprises three-phase main-frequency electric current input source and is connected with described three-phase main-frequency electric current input source; The standard potential transformer also comprising three-phase main-frequency voltage input source and be connected with described three-phase main-frequency voltage input source and load electronic type voltage transformer; Also comprise the standard electric minor electric energy meter be connected with described standard current transformer and standard potential transformer; Each load mutual inductor described is connected with respective merge cells side, the tested digital electric energy meter that described respective merge cells opposite side is connected by the first switch.
Also comprise the phase shifter and stepup transformer that are connected with described three-phase main-frequency electric current input source; And the pressure regulator to be connected with described three-phase main-frequency voltage input source and current lifting device; Described tested digital electric energy meter is connected with accuracy test cell by the second switch with standard electric minor electric energy meter.
Preferably, in above-mentioned digital electric energy meter metering accuracy emulation test system, described phase shifter is 0-1 to the range of adjustment of power factor.
Preferably, in above-mentioned digital electric energy meter metering accuracy emulation test system, described pressure regulator regulate to the range of adjustment of load current be 0A to described tested digital electric energy meter rated current 120%.
Preferably, in above-mentioned digital electric energy meter metering accuracy emulation test system, after described standard electric minor electric energy meter is connected to protocol converter by 645 stipulations, then be connected to the second switch with 61850 protocol.
Preferably, in above-mentioned digital electric energy meter metering accuracy emulation test system, described tested digital electric energy meter is two, and one is connected with described load optical current mutual inductor, and another is connected with described load electricity current transformer.
Preferably, in above-mentioned digital electric energy meter metering accuracy emulation test system, described standard electric minor electric energy meter is high-precision analog table.
From above technical scheme, digital electric energy meter metering accuracy emulation test system provided by the invention, can, by the power factor cosine value of angle (namely between current/voltage phase place) utilizing phase shifter can regulate whole emulation test system simultaneously, pressure regulator be utilized to regulate size of current to simulate different loads situation.Like this, above-mentioned emulation test system just can be simulated and artificial intelligence transformer station digital electric energy meter operation condition in site, by the comparison with the standard electric minor electric energy meter metric results in electric energy metrical bulk loop, realize the test to digital electric energy meter measurement accuracy, it is a kind of brand-new digital electric energy meter confidence level assessment system, and the accuracy utilizing the present invention can measure under the long-time running of simulated digital formula electric energy meter, so compared with the existing mode only utilizing discrete signal code tester digital electric energy meter accuracy, the accuracy conclusion obtained more can be reproduced in the long-term actual use of reality.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, for those of ordinary skills, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of a kind of digital electric energy meter metering accuracy emulation test system that Fig. 1 provides for the embodiment of the present invention.
Wherein:
1-standard potential transformer, 2-standard current transformer, 3-load optical current mutual inductor, 4-load electricity current transformer, 5-load electronic type voltage transformer.
Embodiment
Embodiments provide a kind of digital electric energy meter metering accuracy emulation test system, solve the problem that the accuracy of digital electric energy meter of the prior art is not high.
Technical scheme in the present invention is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
See Fig. 1, this figure is the structural representation of a kind of digital electric energy meter metering accuracy emulation test system that the embodiment of the present invention provides, as shown in the figure, this system standard current transformer 2, load optical current mutual inductor 3 and/or load electricity current transformer 4 of comprising three-phase main-frequency electric current input source and being connected with described three-phase main-frequency electric current input source.The standard potential transformer 1 also comprising three-phase main-frequency voltage input source and be connected with described three-phase main-frequency voltage input source and load electronic type voltage transformer 4.Wherein all above-mentioned standard mutual inductors are all the virtual components in analogue system.Also comprise the standard electric minor electric energy meter be connected with described standard current transformer 2 and standard potential transformer 1.Each load mutual inductor described is connected with respective merge cells side, the tested digital electric energy meter that described respective merge cells opposite side is connected by the first switch.
Also comprise the phase shifter and stepup transformer that are connected with described three-phase main-frequency electric current input source; And the pressure regulator to be connected with described three-phase main-frequency voltage input source and current lifting device; Described tested digital electric energy meter is connected with accuracy test cell by the second switch with standard electric minor electric energy meter.Digital electric energy meter metering accuracy emulation test system provided by the invention, can, by the power factor cosine value of angle (namely between current/voltage phase place) utilizing phase shifter can regulate whole emulation test system simultaneously, pressure regulator be utilized to regulate size of current to simulate different loads situation.Like this, above-mentioned emulation test system just can be simulated and artificial intelligence transformer station digital electric energy meter operation condition in site, by the comparison with the standard electric minor electric energy meter metric results in electric energy metrical bulk loop, realize the test to digital electric energy meter measurement accuracy, it is a kind of brand-new digital electric energy meter confidence level assessment system, and the accuracy utilizing the present invention can measure under the long-time running of simulated digital formula electric energy meter, so compared with the existing mode only utilizing discrete signal code tester digital electric energy meter accuracy, the accuracy conclusion obtained more can be reproduced in the long-term actual use of reality.
In above-mentioned digital electric energy meter metering accuracy emulation test system, in order to reflect tested digitalized electrical energy meter really often by the various different operating states of real working condition used, described phase shifter is 0-1 to the range of adjustment of power factor.This is a wider range of adjustment, so can stand real inspection through the accuracy result of test like this.Meanwhile, then coordinate pressure regulator to the adjustment met in said system, when the power consumption in the actual use of simulation changes, digitalized electrical energy meter is to the sight of electric energy metrical.Described pressure regulator regulate to the range of adjustment of load current be 0A to described tested digital electric energy meter rated current 120%.
In above-mentioned digital electric energy meter metering accuracy emulation test system, after described standard electric minor electric energy meter is connected to protocol converter by 645 stipulations, then be connected to the second switch with 61850 protocol.
In order to comprehensive investigation, reflect the impact of various different electric energy input on digital electric energy meter metering accuracy, described tested digital electric energy meter is two, and one is connected with described load optical current mutual inductor, and another is connected with described load electricity current transformer.In above-mentioned digital electric energy meter metering accuracy emulation test system, described standard electric minor electric energy meter is high-precision analog table.
By the description of above embodiment of the method, those skilled in the art can be well understood to the mode that the present invention can add required general hardware platform by software and realize, hardware can certainly be passed through, but in a lot of situation, the former is better embodiment.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: ROM (read-only memory) (ROM), random access memory (RAM), magnetic disc or CD etc. various can be program code stored medium.
The present invention can describe in the general context of computer executable instructions, such as program module.Usually, program module comprises the routine, program, object, assembly, data structure etc. that perform particular task or realize particular abstract data type.Also can put into practice the present invention in a distributed computing environment, in these distributed computing environment, be executed the task by the remote processing devices be connected by communication network.In a distributed computing environment, program module can be arranged in the local and remote computer-readable storage medium comprising memory device.
It should be noted that, in this article, the such as relational terms of " first " and " second " etc. and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
The above is only the specific embodiment of the present invention; it should be pointed out 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. a digital electric energy meter metering accuracy emulation test system, standard current transformer, load optical current mutual inductor and/or load electricity current transformer that this system comprises three-phase main-frequency electric current input source and is connected with described three-phase main-frequency electric current input source; The standard potential transformer also comprising three-phase main-frequency voltage input source and be connected with described three-phase main-frequency voltage input source and load electronic type voltage transformer; Also comprise the standard electric minor electric energy meter be connected with described standard current transformer and standard potential transformer; Each load mutual inductor described is connected with respective merge cells side, the tested digital electric energy meter that described respective merge cells opposite side is connected by the first switch;
It is characterized in that, also comprise the phase shifter and stepup transformer that are connected with described three-phase main-frequency electric current input source; And the pressure regulator to be connected with described three-phase main-frequency voltage input source and current lifting device; Described tested digital electric energy meter is connected with accuracy test cell by the second switch with standard electric minor electric energy meter.
2. a kind of digital electric energy meter metering accuracy emulation test system according to claim 1, it is characterized in that, described phase shifter is 0-1 to the range of adjustment of power factor.
3. a kind of digital electric energy meter metering accuracy emulation test system according to claim 1, is characterized in that, described pressure regulator regulate to the range of adjustment of load current be 0A to described tested digital electric energy meter rated current 120%.
4. a kind of digital electric energy meter metering accuracy emulation test system according to claim 1, is characterized in that, after described standard electric minor electric energy meter is connected to protocol converter by 645 stipulations, then is connected to the second switch with 61850 protocol.
5. a kind of digital electric energy meter metering accuracy emulation test system according to claim 1, it is characterized in that, described tested digital electric energy meter is two, and one is connected with described load optical current mutual inductor, and another is connected with described load electricity current transformer.
6. a kind of digital electric energy meter metering accuracy emulation test system according to claim 1, is characterized in that, described standard electric minor electric energy meter is high-precision analog table.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106054113A (en) * | 2016-07-27 | 2016-10-26 | 国网山东省电力公司电力科学研究院 | Metering stability testing system for electric energy meter and testing method thereof |
| CN106526526A (en) * | 2016-12-08 | 2017-03-22 | 国网四川省电力公司电力科学研究院 | Test device for digital metering system |
| CN107402368A (en) * | 2017-09-19 | 2017-11-28 | 贵州电网有限责任公司电力科学研究院 | A kind of digitalized electrical energy meter actual load calibration device and method of calibration |
| CN111413661A (en) * | 2020-05-06 | 2020-07-14 | 郑州万特电气股份有限公司 | Detection method for instrument constant test by adopting standard meter method |
| CN112103951A (en) * | 2020-09-07 | 2020-12-18 | 青岛鼎信通讯股份有限公司 | Simulation low-voltage transformer area field power utilization system based on current booster multistage current control |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106054113A (en) * | 2016-07-27 | 2016-10-26 | 国网山东省电力公司电力科学研究院 | Metering stability testing system for electric energy meter and testing method thereof |
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| CN107402368A (en) * | 2017-09-19 | 2017-11-28 | 贵州电网有限责任公司电力科学研究院 | A kind of digitalized electrical energy meter actual load calibration device and method of calibration |
| CN111413661A (en) * | 2020-05-06 | 2020-07-14 | 郑州万特电气股份有限公司 | Detection method for instrument constant test by adopting standard meter method |
| CN111413661B (en) * | 2020-05-06 | 2022-03-29 | 郑州万特电气股份有限公司 | Detection method for instrument constant test by adopting standard meter method |
| CN112103951A (en) * | 2020-09-07 | 2020-12-18 | 青岛鼎信通讯股份有限公司 | Simulation low-voltage transformer area field power utilization system based on current booster multistage current control |
| CN112103951B (en) * | 2020-09-07 | 2024-03-19 | 青岛鼎信通讯股份有限公司 | On-site power utilization system for simulating low-voltage transformer area based on multistage current control of current booster |
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