CN104122526A - High voltage electric energy meter with metering unit capable of being charged to replace - Google Patents
High voltage electric energy meter with metering unit capable of being charged to replace Download PDFInfo
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- CN104122526A CN104122526A CN201410286179.1A CN201410286179A CN104122526A CN 104122526 A CN104122526 A CN 104122526A CN 201410286179 A CN201410286179 A CN 201410286179A CN 104122526 A CN104122526 A CN 104122526A
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Abstract
The invention is applicable to the technical field of electric energy meters, and provides a high voltage electric energy meter with metering unit capable of being charged to replace. The high voltage electric energy meter with metering unit comprises a combined mutual inductor fixedly installed on a rack, wherein the A phase side of the combined mutual inductor is provided with an A phase connector, and the C phase side of the combined mutual inductor is provided with a C phase connector, and the output terminals of the combined mutual inductor are respectively led out to the A phase connector and the C phase connector; the high voltage electric energy meter also comprises an A phase metering unit inserted into the A phase connector and a C phase metering unit inserted into the C phase connector, when the A and C phase metering unit are inserted into the corresponding phase connectors, terminals on the metering units are correspondingly contacted with the output terminals of the combined mutual inductor, for receiving current and voltage output by the combined mutual inductor. The metering unit in the high voltage electric energy meter provided by the invention can be charged to replace, thus being beneficial to field inspection, comparison and replacement of maintainers and shortening field inspecting time.
Description
Technical field
The invention belongs to electric energy meter technical field, relate in particular to the high-voltage electric energy meter that a kind of metering units can charged for replacement.
Background technology
Although existing power distribution network direct access high-voltage electric energy meter have volume little, lightweight, save metal material, can check global error, effectively avoid the advantages such as stealing, also there are some problems, be to be mainly difficult to carry out field test and charged for replacement.
According to the country of electric energy metrical and industry standard, the electric power meter that charging is used (electric energy meter) will, according to the amount of capacity of load, regularly carry out field test, to prove that the error of electric energy meter is within the limits prescribed.The high-voltage electric-energy meter that independently current transformer, voltage transformer (VT) and low-voltage electric energy table form separately of use in the past has method and the rules of the charged check in scene of a set of maturation or the check that has a power failure, and electric energy meter is charged or the replacing that has a power failure is also very easy.
But disclosed integral type directly the high-voltage electric energy meter of metering because metering units is to be integrated in hot end, overall package, so be indoor or outdoor products is all difficult to carry out charged check, have a power failure to change also has inconvenience more.The high-voltage electric energy meter providing such as Chinese invention patent " high voltage electric energy direct metered system and method (publication number is CN101216510A) ", its current acquisition module, voltage acquisition module, electric energy metering module, communication module are just arranged on the hot end of A phase and C phase, be integrated in an insulator with current sensor, voltage sensor, can only have a power failure tests changes with integral body.
Summary of the invention
In view of the above problems, the object of the present invention is to provide the high-voltage electric energy meter that a kind of metering units can charged for replacement, being intended to solve existing high-voltage electric energy meter can only have a power failure and test and the whole technical matters of changing, this high-voltage electric energy meter can charged for replacement metering units, easy to maintenance, be applicable to 3-35kV rural area and urban power distribution network.
The present invention adopts following technical scheme:
A kind of metering units can charged for replacement high-voltage electric energy meter, described high-voltage electric energy meter comprises the combination transformer being fixedly mounted on stand, the A phase side of described combination transformer is provided with the A device that is connected, C phase side is provided with the C device that is connected, the lead-out terminal of described combination transformer leads to respectively the described A device device that is connected with C that is connected, described high-voltage electric energy meter also comprises for inserting the be connected A phase metering units of device of described A, for inserting the be connected C phase metering units of device of described C, work as A, when C phase metering units inserts corresponding connectors, the contact corresponding to the lead-out terminal of described combination transformer of terminal on metering units, for receiving electric current and the voltage of combination transformer output.
Preferably, described combination transformer comprise be arranged on AB phase voltage mutual inductor between mutually of A phase and B, be arranged on BC phase voltage mutual inductor between mutually of B phase and C, be arranged on A phase hot end A phase current mutual inductor, be arranged on the C phase current mutual inductor of C phase hot end.
Preferably, the primary winding of described A phase current mutual inductor and secondary coil are all arranged on A phase hot end, primary winding access A phase current wherein, and secondary coil leads to the A device that is connected as lead-out terminal; The primary winding of described C phase current mutual inductor and secondary coil are all arranged on C phase hot end, primary winding access C phase current wherein, and secondary coil leads to the C device that is connected as lead-out terminal.
Preferably, the primary winding of described AB phase voltage mutual inductor access AB phase voltage, secondary coil is arranged on A phase hot end, and secondary coil leads to the A device that is connected as lead-out terminal; The primary winding access BC phase voltage of described BC phase voltage mutual inductor, secondary coil is arranged on C phase hot end, and secondary coil leads to the C device that is connected as lead-out terminal.
Preferably, when A phase metering units, C phase metering units insert after corresponding connector, A phase metering units, C phase metering units connect by wired or wireless mode.
Preferably, the described A device that is connected is connected with C on device and is equipped with optic fibre connector, and both connect by optical fiber, and described A phase metering units, C phase metering units are also provided with the splicing ear corresponding with described optic fibre connector.
Preferably, described high-voltage electric energy meter also comprises the display terminal of being located at low-pressure side, when A phase metering units, C phase metering units insert after corresponding connector, and A phase metering units, C phase metering units and the communication connection of described display terminal.
Preferably, the connected mode of described A phase metering units, C phase metering units and display terminal is wireless connections or wired connection.
Preferably, the lead-out terminal of described combination transformer comprises current terminal and voltage terminal, when taking out metering units, and current terminal short circuit.
Preferably, the A phase metering units of described high-voltage electric energy meter and C phase metering units can be used that insulating tool is charged to be changed.
The invention has the beneficial effects as follows: the present invention by arranging the A device device that is connected with C that is connected on ABC three-phase solid fixed pattern electric current and voltage combination transformer, wherein A is connected in device and can inserts A phase metering units, C is connected in device can insert C phase metering units, metering units is also arranged on hot end simultaneously, and preferred, between metering units and between metering units and the display terminal of low-pressure side, by wireless mode or wired mode, communicate, in the present invention, metering units can be with and be electrically interposed in or shift out connector, more be conducive to maintainer's field test, comparison and replacing, shorten the on-the-spot inspection table time, in addition, the present invention adopts the combination transformer of phase three-wire three metering method, integrated small design, and its volume is little, lightweight, saving metal material, composition error is low, the whole accurate measurement of high pressure, than conventional high-tension batch meter volume and weight, all reduces more than 50%, the 3rd, connector and metering units, all in high-pressure side, without any secondary electric loop, are avoided wiring error, prevent wrong meter, leak quantity calculation, the generation of electricity theft prevention, the 4th, the three-phase voltage that high-pressure side is directly measured, electric current, power, electric flux and other electric parameters, all complete documentation is stored in high-pressure side, and data message is uploaded to acquiring electric energy information system.In a word, this product can charged for replacement formula design taken into account the requirement of measuring accuracy periodic calibration, can dismounting without just having a power failure during detection, facilitated carrying out of service work.
Accompanying drawing explanation
Fig. 1 is the structural drawing of the high-voltage electric energy meter that provides of the embodiment of the present invention;
Fig. 2 is the electrical schematic diagram of the high-voltage electric energy meter that provides of the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
For technical solutions according to the invention are described, below by specific embodiment, describe.
Fig. 1 is shown the structural drawing of the high-voltage electric energy meter that the embodiment of the present invention provides, and the electrical schematic diagram of the high-voltage electric energy meter that Fig. 2 provides for the embodiment of the present invention, only shows the part relevant to the embodiment of the present invention for convenience of explanation.
See figures.1.and.2, the metering units that the present embodiment provides can charged for replacement high-voltage electric energy meter comprise the combination transformer 1 being fixedly mounted on stand, the A phase side of described combination transformer 1 is provided with the A device 3 that is connected, C phase side is provided with the C device 7 that is connected, the lead-out terminal of described combination transformer 1 leads to respectively described A device 3 device 7 that is connected with C that is connected, described high-voltage electric energy meter also comprises for inserting the be connected A phase metering units 2 of device of described A, for inserting the be connected C phase metering units 6 of device of described C, work as A, when C phase metering units inserts corresponding connectors, on described metering units, correspondence is provided with the terminal that some contact with the lead-out terminal of described combination transformer, for receiving electric current and the voltage of combination transformer output.
A, C phase metering units are inserted after corresponding connectors, the contact corresponding to the lead-out terminal of combination transformer of terminal on metering units, lead-out terminal output current and the voltage of combination transformer, metering units can receive and detect electric current and voltage, and metering units can calculate electric energy and other electric parameters like this.In the present embodiment, increased A phase, the C device that is connected, metering units is absolute construction, can charged plug, replaceable, be more conducive to maintainer's field test, comparison, replacing, and shorten the on-the-spot inspection table time.Further preferred, the A phase metering units of described high-voltage electric energy meter and C phase metering units can be used that insulating tool is charged carries out plug and replacing, guarantee safety.
As a kind of concrete structure of combination transformer 1, described combination transformer 1 comprise be arranged on AB phase voltage mutual inductor 5 between mutually of A phase and B, be arranged on BC phase voltage mutual inductor 9 between mutually of B phase and C, be arranged on A phase hot end A phase current mutual inductor 4, be arranged on the C phase current mutual inductor 8 of C phase hot end; The primary winding of described A phase current mutual inductor 4 and secondary coil are all arranged on A phase hot end, primary winding access A phase current wherein, and secondary coil leads to the A device that is connected as lead-out terminal; The primary winding of described C phase current mutual inductor 8 and secondary coil are all arranged on C phase hot end, primary winding access C phase current wherein, and secondary coil leads to the C device that is connected as lead-out terminal; The primary winding access AB phase voltage of described AB phase voltage mutual inductor 5, secondary coil is arranged on A phase hot end, and secondary coil leads to the A device that is connected as lead-out terminal; The primary winding access BC phase voltage of described BC phase voltage mutual inductor 9, secondary coil is arranged on C phase hot end, and secondary coil leads to the C device that is connected as lead-out terminal.In the present embodiment, the lead-out terminal of combination transformer has two groups, every group has four terminals, one of them is current terminal, one be public terminal, another two for voltage terminal, when inserting metering units, four terminals and metering units connection, when extracting metering units, current terminal is with short circuit between public terminal.As shown in Figure 2, from top to bottom, be followed successively by current terminal, public terminal, below two be voltage terminal.On secondary coil one end sub-connection current terminal of A phase current mutual inductor, one end is connected on public terminal, the secondary coil of AB phase voltage mutual inductor has two, and one end is all connected on public terminal, another terminal is connected on two voltage terminals, on A phase line of electric force, is also connected on public terminal.In C phase side, be symmetrical structure with A phase side, repeat no more here.
In this preferred structure, the output of the secondary of electric current and voltage accesses metering units by connector, and wiring error, all in high-pressure side, without any secondary electric loop, is avoided in connector and electric energy metrical unit, prevents wrong meter, leaks quantity calculation, the generation of electricity theft prevention.
Further, in the present embodiment, when A phase metering units, C phase metering units insert after corresponding connector, A phase metering units, C phase metering units connect by wired or wireless mode.When connecting for wireless mode, in A phase metering units, C phase metering units, be provided with wireless module, can transmit data between the two; If during wired connection, such as optical fiber connects, the described A device that is connected is connected with C on device and is equipped with optic fibre connector, both connect by optical fiber, and described A phase metering units, C phase metering units are also provided with splicing ear, after inserting metering units, described splicing ear contacts with optic fibre connector, between A phase metering units and C phase metering units, having realized like this data optical fiber transmits, the noble potential of having realized electric current and voltage signal directly gathers, and carries out measurement and the metering of three-phase electric energy and other electric parameters.
In addition, preferably, described high-voltage electric energy meter also comprises the display terminal 11 of being located at low-pressure side, this display terminal is a part for power information acquisition management system, when A phase metering units, C phase metering units insert after corresponding connector, A phase metering units, C phase metering units and the communication connection of described display terminal, connected mode is wireless connections or wired connection; Same when for wireless connections, by wireless module to display terminal uploading data, when being wired connection, connector and metering units are provided with corresponding optic fibre connector, and display terminal is connected to the respective terminal of connector by optical fiber, the electric energy collecting and other electric parameter information signals are sent to display terminal 11 and show.In this optimal way, three-phase voltage, electric current, power, electric flux and other electric parameters directly measured, equal complete documentations and be stored in high-pressure side, full detail is directly uploaded power information acquisition management system, Real-Time Monitoring power information by built-in wireless or wired (preferred fiber communication mode).
Certainly the high-voltage electric energy meter embodiment of the present invention being provided, before dispatching from the factory and after using some cycles, all needs the calibrating of being correlated with.Concrete, thereby can carry out respectively error testing or calibration to each mutual inductor and metering units by classic method, obtain composition error numerical value, also can obtain its global error by the method for high-voltage electric energy meter piece calibration or calibrating.
Metering units can carry out error testing to its voltage transformer (VT), current transformer by charged for replacement formula high-voltage electric energy meter when dispatching from the factory, and also can by global error, carry out error testing or calibration to high-voltage electric energy meter.Global error calibrating is undertaken by special-purpose high-voltage electric energy meter checking table, and the path of the standard magnitude tracing of high-voltage electric energy meter correction platform is: standard high-voltage current transformer, standard high-voltage voltage transformer (VT) and the standard electric energy meter magnitude tracing to legal more pin-point accuracy grade by the current transformer in high-voltage electric energy meter correction platform, voltage transformer (VT) and standard electric energy meter respectively.High-voltage electric energy meter checking table is controlled each test point according to inspection procedure, the stable large electric current of high pressure three-phase for test is provided, thereby and carries out with standard metering system the global error verification that electric energy error comparing is realized tested high-voltage electric energy meter.
For the metering units of changing at the scene, according to the class of accuracy of its demarcation, carry out calibration or verification, by low pressure correction platform, carry out according to the conventional method error testing or calibration.A phase metering units and C phase metering units are combined to a set of low voltage three-phase electric energy meter of formation, according to the vertification regulation of low-voltage electric energy table, respectively the phase-splitting electric energy of A phase metering units and C phase metering units is carried out to calibration or verification, then the three-phase electric energy after synthetic is examined and determine.
The A phase metering units that adopts wireless mode communication and C measure unit mutually should match setting frequency, calibration, calibrating and use.
Can specify a metering units to close the calculating of phase electric energy, as master unit, with display terminal, communicate; Also can specify two metering units to close separately the calculating of phase electric energy simultaneously, and with display terminal, communicate respectively.
After reaching the calibration interval, at the scene with replacing operating metering units through the metering units being up to the standards in advance, thereby can realize the regular error-tested to high-voltage electric energy meter.By substitute the metering units getting off send back to laboratory calibrate for error check after, for the regular replacement of next round.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. the high-voltage electric energy meter that a metering units can charged for replacement, it is characterized in that, described high-voltage electric energy meter comprises the combination transformer being fixedly mounted on stand, the A phase side of described combination transformer is provided with the A device that is connected, C phase side is provided with the C device that is connected, the lead-out terminal of described combination transformer leads to respectively the described A device device that is connected with C that is connected, described high-voltage electric energy meter also comprises for inserting the be connected A phase metering units of device of described A, for inserting the be connected C phase metering units of device of described C, work as A, when C phase metering units inserts corresponding connectors, the contact corresponding to the lead-out terminal of described combination transformer of terminal on metering units, for receiving electric current and the voltage of combination transformer output.
2. high-voltage electric energy meter as claimed in claim 1, it is characterized in that, described combination transformer comprise be arranged on AB phase voltage mutual inductor between mutually of A phase and B, be arranged on BC phase voltage mutual inductor between mutually of B phase and C, be arranged on A phase hot end A phase current mutual inductor, be arranged on the C phase current mutual inductor of C phase hot end.
3. high-voltage electric energy meter as claimed in claim 2, is characterized in that, the primary winding of described A phase current mutual inductor and secondary coil are all arranged on A phase hot end, primary winding access A phase current wherein, and secondary coil leads to the A device that is connected as lead-out terminal; The primary winding of described C phase current mutual inductor and secondary coil are all arranged on C phase hot end, primary winding access C phase current wherein, and secondary coil leads to the C device that is connected as lead-out terminal.
4. high-voltage electric energy meter as claimed in claim 3, is characterized in that, the primary winding access AB phase voltage of described AB phase voltage mutual inductor, and secondary coil is arranged on A phase hot end, and secondary coil leads to the A device that is connected as lead-out terminal; The primary winding access BC phase voltage of described BC phase voltage mutual inductor, secondary coil is arranged on C phase hot end, and secondary coil leads to the C device that is connected as lead-out terminal.
5. high-voltage electric energy meter as claimed in claim 4, is characterized in that, when A phase metering units, C phase metering units insert after corresponding connector, A phase metering units, C phase metering units connect by wired or wireless mode.
6. high-voltage electric energy meter as claimed in claim 5, it is characterized in that, the described A device that is connected is connected with C on device and is equipped with optic fibre connector, and both connect by optical fiber, and described A phase metering units, C phase metering units are also provided with the splicing ear corresponding with described optic fibre connector.
7. high-voltage electric energy meter as claimed in claim 4, it is characterized in that, described high-voltage electric energy meter also comprises the display terminal of being located at low-pressure side, when A phase metering units, C phase metering units insert after corresponding connector, and A phase metering units, C phase metering units and the communication connection of described display terminal.
8. high-voltage electric energy meter as claimed in claim 7, is characterized in that, the connected mode of described A phase metering units, C phase metering units and display terminal is wireless connections or wired connection.
9. high-voltage electric energy meter as described in claim 1-8 any one, is characterized in that, the lead-out terminal of described combination transformer comprises current terminal and voltage terminal, when taking out metering units, and current terminal short circuit.
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| CN201410286179.1A CN104122526B (en) | 2014-06-24 | 2014-06-24 | High voltage electric energy meter with metering unit capable of being charged to replace |
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| CN201410286179.1A CN104122526B (en) | 2014-06-24 | 2014-06-24 | High voltage electric energy meter with metering unit capable of being charged to replace |
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| CN104122526A true CN104122526A (en) | 2014-10-29 |
| CN104122526B CN104122526B (en) | 2017-05-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109507462A (en) * | 2018-12-03 | 2019-03-22 | 广东电网有限责任公司 | A kind of replacement terminal auxiliary device of interlock protection |
| CN110441569A (en) * | 2019-08-30 | 2019-11-12 | 陈劲游 | It is a kind of can charged for replacement high-voltage electric energy meter and its application |
| CN110554224A (en) * | 2019-08-30 | 2019-12-10 | 陈劲游 | Light and small high-voltage electric energy meter capable of being replaced in electrified mode and application thereof |
| CN113466680A (en) * | 2021-05-26 | 2021-10-01 | 中国电力科学研究院有限公司 | Self-calibration method and system of metering module pluggable and interchangeable circuit breaker |
| CN113552524A (en) * | 2021-06-17 | 2021-10-26 | 中国电力科学研究院有限公司 | Measurement module for supporting hot plug and automatic calibration method |
Families Citing this family (1)
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| CN105044451B (en) * | 2015-06-24 | 2017-12-12 | 云南电网有限责任公司电力科学研究院 | Live replacement of electric energy meter electric quantity compensating optimization method based on least square curve fit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110554224A (en) * | 2019-08-30 | 2019-12-10 | 陈劲游 | Light and small high-voltage electric energy meter capable of being replaced in electrified mode and application thereof |
| CN113466680A (en) * | 2021-05-26 | 2021-10-01 | 中国电力科学研究院有限公司 | Self-calibration method and system of metering module pluggable and interchangeable circuit breaker |
| CN113466680B (en) * | 2021-05-26 | 2023-12-08 | 中国电力科学研究院有限公司 | Self-calibration method and system for circuit breaker with pluggable metering module |
| CN113552524A (en) * | 2021-06-17 | 2021-10-26 | 中国电力科学研究院有限公司 | Measurement module for supporting hot plug and automatic calibration method |
| CN113552524B (en) * | 2021-06-17 | 2024-02-09 | 中国电力科学研究院有限公司 | Measurement module for supporting hot plug and automatic calibration method |
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