CN201191317Y - Global error in-situ detection apparatus for electric metering cabinet - Google Patents
Global error in-situ detection apparatus for electric metering cabinet Download PDFInfo
- Publication number
- CN201191317Y CN201191317Y CNU2008200082995U CN200820008299U CN201191317Y CN 201191317 Y CN201191317 Y CN 201191317Y CN U2008200082995 U CNU2008200082995 U CN U2008200082995U CN 200820008299 U CN200820008299 U CN 200820008299U CN 201191317 Y CN201191317 Y CN 201191317Y
- Authority
- CN
- China
- Prior art keywords
- voltage
- group
- electric
- standard
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model relates to a global error on-site verifying unit of an electric power measurement cabinet, which comprises a power supply signal generating unit, a standard high-pressure current transformator group, a standard high-pressure voltage transformator group, a standard electric energy meter and a comparison indicator, wherein the output end of the power supply signal generating unit is respectively connected with a three-phase voltage booster and a current booster group, the standard high-pressure current transformator and the standard high-pressure voltage transformator are arranged on a three-phase power line, and are located among the electric power measurement cabinet to be tested, the voltage booster group and the current booster group, the standard electric energy meter is respectively connected with the standard high-pressure current transformator group and the standard high-pressure voltage transformator group to measure a standard electric energy value, the output end of the standard electric energy meter and output ends of the standard high-pressure current transformator group and the standard high-pressure voltage transformator group are respectively connected with the power supply signal generating unit, the comparison indicator is respectively connected with the standard electric energy meter and the electric power measurement cabinet, and receives signals of characterization electric energy values of the standard electric energy meter and the electric power measurement cabinet to display verifying results.
Description
Technical field
The utility model relates to a kind of power equipment calibration equipment, particularly be a kind of on-the-spot device that the electric-power metering cabinet is carried out the global error verification that can be used for.
Background technology
The electric energy metrical cabinet is most important electric energy measuring equipment, network interface electric energy measuring equipment particularly, it mainly comprises voltage transformer (VT), current transformer and low-voltage electric energy table, and for a long time, the subject matter that it exists is to carry out whole measurement verification and calibration.Customary at present mode is to use the method for error synthesis to come the accuracy of this metering outfit of standard, also can only adopt the various piece of voltage transformer (VT) on-site calibrator, current mutual inductor on site tester, electric energy meter on-site calibrator and secondary voltage drop tester verification metering cabinet respectively for the field-checking of electric-power metering cabinet, obtain the error of voltage transformer (VT), current transformer and electric energy meter each several part and the amount of influence of voltage transformer secondary voltage drop, calculate the overall precision of calculating metering cabinet by composition error then.For example highest ranking is that 1 grade electric energy metrical cabinet uses 0.2 grade current transformer, and the accuracy of the electric energy metrical cabinet that the electric energy meter of 0.2 grade voltage transformer (VT) and 0.2 grade is formed is a composition error 0.7%.According to the cardinal rule of International Electrotechnical Commission (IEC) about electric energy and calibrator for watt-hour meter regulation: " error of all instrument and measurement mechanism all must be carried out actual measurement; without measurement; only be calculate in measuring with other or quote the error of voltage, electric current and power factor combination; can not be as the foundation of evaluating apparatus fundamental error ", so 0.7% composition error of above-mentioned electric energy metrical cabinet can not be used to estimate the accuracy of electric energy metrical cabinet.
Because technical reason does not also have a kind of equipment can realize the integral body of electric energy metrical cabinet is examined and determine and calibrated so far, according to a kind of measurement instrument that does not have accuracy index or its accuracy index not to have maybe can not implement objective measurement verification of the measurement Law of China, its metering result can not be as the foundation to user's charge, so electric energy metrical cabinet verifying attachment becomes the important blank that the electric energy metrical field exists for a long time.On the other hand, used the induction type electric energy meter in more than 100 year, realize be electric current (typical ratings is 5A) and voltage (typical ratings is 220V, the 100V) ratio that obtains that multiplies each other in the power of its aluminium dish rotating speed, aluminium dish revolution carried out totally just can obtain electric energy meter degree.The expansion of its range then relies on current transformer CT and voltage transformer pt, and having formed one thus is core with the induction type electric energy meter, electric energy metrical that current transformer CT and voltage transformer pt are supporting with it and electric network measuring and controlling technical system.To the eighties in last century, because the high speed development of scientific-technical progress and IT industry, digital electronic electric energy meter based on the A/D technology has appearred, and the very fast trend that replaces induction type electric energy meter that formed, it is at the high-end induction type table that replaced fully at present, it is also very fast that the product low side replaces induction type watch progress, and oneself surpasses the induction type table electronic watch of new production at present.What electronic electric energy meter was realized is multiplying each other of voltage and voltage, the corresponding techniques system should be that current/voltage (I/V) transducer and voltage/voltage (V/V) transducer are the voltage signal of A/D level match with input current and voltage transitions, and typical ratings is 1V, 2V.If but continue to continue to use original voltage transformer pt, current transformer CT system, on the basis of 5A, 100V, obtain the voltage of A/D level again by sampling resistor and voltage divider, not only increase the complicacy of technology, increased cost, and influenced the accuracy of measuring and technical progress.
Applicant is the high-voltage electric energy meter calibration equipment in the patent No. of on August 31st, 2006 application for the ZL200620098741.9 exercise question, and it comprises low voltage voltage current signal generation device, stepup transformer, current lifting device, standard electric energy meter, by school high-voltage electric energy meter test product platform, high-tension current inductor, high voltage potential transformer and twin check display device; The output terminal of low voltage voltage current signal generation device connects stepup transformer and current lifting device, the output terminal of stepup transformer and current lifting device is connected by school high-voltage electric energy meter, high-tension current inductor and high voltage potential transformer, high-tension current inductor, high voltage potential transformer are exported to standard electric energy meter, are all linked to each other with the twin check display device with standard electric energy meter by the school high-voltage electric energy meter.
Above-mentioned patent is that the technical scheme that overcomes the global error verification of electric-power metering cabinet provides the foundation.Yet for the field-checking of electric-power metering cabinet, also need the convenience of operating at the scene with quick, and for the characteristics of electric-power metering cabinet more targetedly design aspect improve.
Summary of the invention
The purpose of this utility model is, provides a kind of electric-power metering cabinet global error on-site calibration device, in order to overcome above-mentioned defective.
For achieving the above object, the technical solution adopted in the utility model is, a kind of electric-power metering cabinet global error on-site calibration device is provided, and it comprises:
One power supply signal generation unit, it is in order to produce low-tension current, voltage signal;
Its output terminal is connected with three-phase voltage increasing device and current lifting device group respectively, and forms three-phase power line output;
Standard high-voltage current transformer group and standard high-voltage voltage transformer (VT) group are arranged on the described three-phase power line, between tested electric-power metering cabinet and described stepup transformer and current lifting device group;
One standard electric energy meter is connected with described standard high-voltage current transformer group and standard high-voltage voltage transformer (VT) group respectively, in order to the measurement of benchmark energy value;
The output terminal of described standard electric energy meter, standard high-voltage current transformer group and standard high-voltage voltage transformer (VT) group output terminal are connected with described power supply signal generation unit respectively;
One relatively display instrument links to each other with described standard electric energy meter and electric-power metering cabinet respectively, receive the signal of the sign energy value that both calculate separately, in order to the demonstration check results;
Preferable, described power supply signal generation unit is a low voltage voltage current signal generation device;
Preferable, the group number of described current lifting device group is two groups;
Preferable, the group number of described standard high-voltage current transformer group and standard high-voltage voltage transformer (VT) group is respectively two groups;
Preferable, the signal of described sign energy value is a pulse signal;
Preferable, also comprise: a supervisory keyboard is connected with described power supply signal generation unit.
The beneficial effects of the utility model are compared with the prior art, at first, it has realized the whole verification of electric-power metering cabinet, make high-voltage metering cubicle have whole measuring accuracy, avoided detecting the complicated processes of electric energy meter, mutual inductor, secondary circuit under the traditional approach respectively, thereby improved the verification work efficiency greatly;
Secondly, because the reduction of actual loading, described low voltage voltage current signal generating means has significantly reduced power attenuation, thereby all reducing to some extent on the volume of this device and on the weight, has satisfied the requirement of field-checking convenience;
At last, characteristics at phase three-wire three electric-power metering cabinet, adopt current lifting device, high voltage potential transformer, high-tension current inductor to adopt two groups of the carrying out that just can guarantee field-checking respectively, and adopt the three-phase voltage increasing device, thereby further reduce the volume and the weight of device.
Description of drawings
Fig. 1 is the utility model electric-power metering cabinet global error on-site calibration device illustrative view of functional configuration.
Embodiment
Below in conjunction with accompanying drawing, to this novel above-mentionedly is described in more detail with other technical characterictic and advantage.
See also shown in Figure 1, it is the utility model electric-power metering cabinet global error on-site calibration device illustrative view of functional configuration, electric-power metering cabinet global error on-site calibration device of the present utility model is applicable to the field-checking of electric-power metering cabinet 7, what adopt as the described electric-power metering cabinet 7 of verification object is the metering cabinet of phase three-wire three two elements method metering, and it comprises:
One power supply signal generation unit, it is in order to the signal source as the generation of low-tension current, voltage; What adopt here is low voltage voltage current signal generation device 2, its output terminal joins with three-phase voltage increasing device 3 and current lifting device group 4 (adopting two groups here) respectively, and formation three-phase power line output, the function of finishing in fact be with low voltage voltage current signal generation device 2 by boost, after up-flow handles, for electric-power metering cabinet 7 provides the simulated conditions-high pressure of work, big current input signal;
The input end of described electric-power metering cabinet 7 directly is connected with three-phase voltage increasing device 3 and current lifting device group 4 by the mode of phase three-wire three two elements method, and metering output obtains to characterize the signal of energy value;
Standard high-voltage current transformer group 5 and standard high-voltage voltage transformer (VT) group 6 are arranged on the described three-phase power line, and be two groups of settings simultaneously, it lays respectively at the equivalent position of working with described electric-power metering cabinet 7 between described electric-power metering cabinet 7 and described stepup transformer 3 and the current lifting device group 4;
One standard electric energy meter 8 is connected with described standard high-voltage current transformer group 6 and standard high-voltage voltage transformer (VT) group 5 respectively, in order to calculate energy value;
The output terminal of described standard electric energy meter 8, standard high-voltage current transformer group 6 and standard high-voltage voltage transformer (VT) group 5 output terminals are connected with described low voltage voltage current signal generation device 2 respectively, in order to the transmission feedback signal;
Also comprise: one compares display instrument 9 is connected with described standard electric energy meter 8 and electric-power metering cabinet 7 respectively, receive both and characterize the signal of energy value, in order to show check results, the signal of wherein said sign energy value is the electrical energy pulse signal, promptly all sent to and describedly must compare display instrument 9, show the number percent of the electric energy metering error that described comparison display instrument 8 calculates simultaneously by the high frequency verification pulse of the electrical energy pulse signal of verification object electric-power metering cabinet 7 output and standard electric energy meter 8.
The control section of the utility model electric-power metering cabinet global error on-site calibration device is realized by supervisory keyboard 1, in order to the magnitude of voltage and the current value of 2 outputs of described low voltage voltage current signal generation device to be set, thereby regulate the generation of control low voltage voltage, electric current.
In use described detected object electric-power metering cabinet 7 is separated from electric system, and directly be connected with three-phase voltage increasing device 3 and current lifting device group 4 with the mode of described phase three-wire three two elements method, when calibration equipment work begins, by described supervisory keyboard 1 input voltage, basic parameters such as electric current, control described low voltage voltage current signal generation device 2 and produce three-phase voltage signal and biphase current signal, phase angle can be provided with in advance between each phase current voltage, certainly voltage and current signal output effective value also can be set respectively, the harmonic wave that can superpose respectively on voltage and current signal, output frequency can be set in 40～60 hertz of scopes.The foundation of error calibrating is a relative method, and according to the output recurrent interval of described electric-power metering cabinet 7, the umber of pulse of statistical standard electric energy meter output by calculating error, and relatively shows on the display instrument 9 described;
Need to prove, the output terminal of described standard electric energy meter 8, standard high-voltage current transformer group 5 and standard high-voltage voltage transformer (VT) group 6 output terminals are connected with described low voltage voltage current signal generation device 2 feedback ends respectively, in order to the transmission feedback signal, its objective is low-tension current for control stabilization, the generation of voltage, by the electric current that feedbacks, voltage signal and predefined comparing, thereby adjust accordingly, described on the other hand low voltage voltage current signal generation device 2 itself also has Presentation Function, can demonstration work export situation, and the parameters that feeds back.
More than explanation is novel just illustrative for this; and it is nonrestrictive; those of ordinary skills understand; under the situation of the spirit and scope that do not break away from following claims and limited; can make many modifications; change, or equivalence, but all will fall in the protection domain of the present utility model.
Claims (6)
1, a kind of electric-power metering cabinet global error on-site calibration device, it is characterized in that: it comprises:
One power supply signal generation unit, it is in order to produce low-tension current, voltage signal;
Its output terminal is connected with three-phase voltage increasing device and current lifting device group respectively, and forms three-phase power line output;
Standard high-voltage current transformer group and standard high-voltage voltage transformer (VT) group are arranged on the described three-phase power line, between tested electric-power metering cabinet and described stepup transformer and current lifting device group;
One standard electric energy meter is connected with described standard high-voltage current transformer group and standard high-voltage voltage transformer (VT) group respectively, in order to the measurement of benchmark energy value;
The output terminal of described standard electric energy meter, standard high-voltage current transformer group and standard high-voltage voltage transformer (VT) group output terminal are connected with described power supply signal generation unit respectively;
One relatively display instrument links to each other with described standard electric energy meter and electric-power metering cabinet respectively, receive the signal of the sign energy value that both calculate separately, in order to the demonstration check results.
2, electric-power metering cabinet global error on-site calibration device according to claim 1, it is characterized in that: described power supply signal generation unit is a low voltage voltage current signal generation device.
3, electric-power metering cabinet global error on-site calibration device according to claim 1, it is characterized in that: the group number of described current lifting device group is two groups.
4, electric-power metering cabinet global error on-site calibration device according to claim 1, it is characterized in that: the group number of described standard high-voltage current transformer group and standard high-voltage voltage transformer (VT) group is respectively two groups.
5, electric-power metering cabinet global error on-site calibration device according to claim 1, it is characterized in that: the signal of described sign energy value is a pulse signal.
6, according to each described electric-power metering cabinet global error on-site calibration device of claim 1-5, it is characterized in that: also comprise: a supervisory keyboard is connected with described power supply signal generation unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200082995U CN201191317Y (en) | 2008-03-14 | 2008-03-14 | Global error in-situ detection apparatus for electric metering cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200082995U CN201191317Y (en) | 2008-03-14 | 2008-03-14 | Global error in-situ detection apparatus for electric metering cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201191317Y true CN201191317Y (en) | 2009-02-04 |
Family
ID=40335480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200082995U Expired - Fee Related CN201191317Y (en) | 2008-03-14 | 2008-03-14 | Global error in-situ detection apparatus for electric metering cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201191317Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102156274A (en) * | 2011-04-22 | 2011-08-17 | 四川电力科学研究院 | Field integral detecting system of three-phase electric energy measuring system of electric distribution network |
| CN101498777B (en) * | 2009-03-19 | 2012-05-02 | 重庆电力科学试验研究院 | Detection apparatus for carrier wave electric energy meter |
| CN102901945A (en) * | 2012-09-27 | 2013-01-30 | 陕西富集电力科技股份有限公司 | Integrated error checking system of electric energy meter |
| CN103592507A (en) * | 2013-11-29 | 2014-02-19 | 国网安徽省电力公司淮南供电公司 | Voltage loop alarm for metering devices of transformer station |
| CN105738850A (en) * | 2014-12-10 | 2016-07-06 | 云南电网公司电力科学研究院 | High-voltage voltage and current signal generation control device |
| CN106597358A (en) * | 2017-01-03 | 2017-04-26 | 深圳供电局有限公司 | Traceability verification method for networked electric energy meter |
| CN107192974A (en) * | 2017-07-19 | 2017-09-22 | 云南电网有限责任公司电力科学研究院 | Integration voltage current standard transformer |
| CN107219492A (en) * | 2017-04-24 | 2017-09-29 | 国网浙江省电力公司电力科学研究院 | Medium voltage network electric energy metrical high pressure integration semi-physical simulation device |
| CN107356895A (en) * | 2017-08-29 | 2017-11-17 | 南方电网科学研究院有限责任公司 | Error measuring system of high-voltage current transformer |
| CN107490779A (en) * | 2017-09-22 | 2017-12-19 | 苏州华电电气股份有限公司 | The calibration system and calibration platform and instruction carriage of 220KV high-voltage electric energy measurement equipment |
-
2008
- 2008-03-14 CN CNU2008200082995U patent/CN201191317Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498777B (en) * | 2009-03-19 | 2012-05-02 | 重庆电力科学试验研究院 | Detection apparatus for carrier wave electric energy meter |
| CN102156274A (en) * | 2011-04-22 | 2011-08-17 | 四川电力科学研究院 | Field integral detecting system of three-phase electric energy measuring system of electric distribution network |
| CN102156274B (en) * | 2011-04-22 | 2012-10-03 | 四川电力科学研究院 | Field integral detecting system of three-phase electric energy measuring system of electric distribution network |
| CN102901945A (en) * | 2012-09-27 | 2013-01-30 | 陕西富集电力科技股份有限公司 | Integrated error checking system of electric energy meter |
| CN103592507A (en) * | 2013-11-29 | 2014-02-19 | 国网安徽省电力公司淮南供电公司 | Voltage loop alarm for metering devices of transformer station |
| CN105738850A (en) * | 2014-12-10 | 2016-07-06 | 云南电网公司电力科学研究院 | High-voltage voltage and current signal generation control device |
| CN106597358A (en) * | 2017-01-03 | 2017-04-26 | 深圳供电局有限公司 | Traceability verification method for networked electric energy meter |
| CN107219492A (en) * | 2017-04-24 | 2017-09-29 | 国网浙江省电力公司电力科学研究院 | Medium voltage network electric energy metrical high pressure integration semi-physical simulation device |
| CN107192974A (en) * | 2017-07-19 | 2017-09-22 | 云南电网有限责任公司电力科学研究院 | Integration voltage current standard transformer |
| CN107192974B (en) * | 2017-07-19 | 2023-06-09 | 云南电网有限责任公司电力科学研究院 | Integrated voltage and current standard transformer |
| CN107356895A (en) * | 2017-08-29 | 2017-11-17 | 南方电网科学研究院有限责任公司 | Error measuring system of high-voltage current transformer |
| CN107356895B (en) * | 2017-08-29 | 2023-09-15 | 南方电网科学研究院有限责任公司 | Error measurement system of high-voltage current transformer |
| CN107490779A (en) * | 2017-09-22 | 2017-12-19 | 苏州华电电气股份有限公司 | The calibration system and calibration platform and instruction carriage of 220KV high-voltage electric energy measurement equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201191317Y (en) | Global error in-situ detection apparatus for electric metering cabinet | |
| CN101865986B (en) | System and method for checking error of high-voltage electric energy measurement device | |
| CN201444193U (en) | Comprehensive error detection device used for digital electric energy measuring device | |
| Cataliotti et al. | A novel approach to current transformer characterization in the presence of harmonic distortion | |
| CN201425621Y (en) | Error checking system of high-voltage electric energy metering device | |
| CN201514473U (en) | Error positioning device of high-voltage electric power metering device | |
| CN203658570U (en) | Portable calibrating device for digital electric energy metering device | |
| CN102162842A (en) | Online check meter of high-voltage electric energy metering device | |
| CN102435858A (en) | Method and system for online measurement of short-circuit loss and open-circuit loss of transformer | |
| CN101251585A (en) | Method and apparatus for checking global error of high voltage energy metering installation | |
| Bucci et al. | Embedded power and energy measurement system based on an analog multiplier | |
| Artale et al. | Measurement of simplified single-and three-phase parameters for harmonic emission assessment based on IEEE 1459-2010 | |
| CN107748348A (en) | The high-voltage electric energy meter calibrating installation that can integrally trace to the source | |
| CN202486269U (en) | State tester of electrical equipment | |
| CN202075405U (en) | Onsite overall detection system of three-phase electric energy metering system of distribution network | |
| CN2916652Y (en) | Electric power measuring cabinet testing device | |
| CN204129201U (en) | A kind of high-voltage electric energy measurement equipment error pick-up unit | |
| CN103941216B (en) | Voltage transformer scene Automatic Check-out And Readiness Equipment | |
| CN202886585U (en) | On-line test device for voltage/current transformer | |
| CN102096033A (en) | Test device for sudden short circuit of voltage transformer | |
| CN203870240U (en) | Voltage transformer on-site detector | |
| CN107144758B (en) | Method for testing influence of thermal effect on short-circuit resistance of transformer | |
| CN109581265A (en) | A kind of anti-DC performance detection method of current transformer based on power error | |
| Marcus et al. | The influence of the network impedance on the nonsinusoidal (harmonic) network current and flicker measurements | |
| Arseneau | Application of IEEE standard 1459-2000 for revenue meters |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WUHAN GUOCE HENGTONG INTELLIGENT INSTRUMENT CO., L Free format text: FORMER OWNER: WUHAN GUOCE SCI-TECH CO., LTD. Effective date: 20120905 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120905 Address after: 430223, Wuhan Road, East Lake Development Zone, Hubei, Hubei Province, No. 38 Patentee after: Wuhan Guoce Hengtong Intelligent Instrument Co., Ltd. Address before: 430223 Hubei city of Wuhan province Miao Shan Development Zone Jiangxia Jiangxia Avenue Road No. 1 guoce guoce Industrial Park Patentee before: Wuhan Guoce Science & Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090204 Termination date: 20160314 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |