CN210090657U - Active detector of electric energy metering device - Google Patents
Active detector of electric energy metering device Download PDFInfo
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- CN210090657U CN210090657U CN201920756699.2U CN201920756699U CN210090657U CN 210090657 U CN210090657 U CN 210090657U CN 201920756699 U CN201920756699 U CN 201920756699U CN 210090657 U CN210090657 U CN 210090657U
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Abstract
The utility model discloses an active detector of an electric energy metering device, which comprises a test source and a tester, wherein the test source and the tester adopt a wireless Zigbee network communication mode to carry out data interaction and control; the testing method is simple and convenient, the testing result is accurate and reliable, and the checking efficiency of the metering device before operation can be greatly improved. The utility model can be checked under the condition that the electric energy metering device is not electrified, can check the on-site wiring of three-phase three-wire or three-phase four-wire electric energy meters, and can identify the conditions of wiring error, circuit open circuit and the like of the metering device; meanwhile, the transformer transformation ratio testing function is achieved, and whether the transformation ratios of the voltage transformer within 35kV and the current transformer within 2000A are qualified or not can be conveniently detected.
Description
Technical Field
The utility model relates to an active detector of electric energy metering device belongs to electric power metering equipment technical field.
Background
With the continuous growth of power consumers, metering errors caused by wiring errors of metering loops or disqualification of metering devices occur occasionally in the installation and construction process of power utilization projects, so that the electricity charge is low, and customer complaints are caused. At present, metering errors become an event with high occurrence frequency, meter installation and power connection are the last and most critical links before power transmission, the accuracy of power charge metering is determined, at present, an effective and simple detection method is not available after a metering device is installed on the site by a new high-voltage installation user, so that a wiring error or a metering device is not qualified after power transmission, a user cannot adjust a metering circuit wiring or replace the metering device in a power failure mode due to the restriction of production benefits after power transmission, a metering circuit wiring error or a metering device fault is found after power transmission, certain economic loss is caused, and the quality of power supply service and the benefits of both power supply and power consumption are directly influenced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an active detector of electric energy metering device for the inspection before the on-the-spot electric energy metering device is put into operation, measurement return circuit wiring inspection, voltage current transformer transformation ratio test before the power transmission, thereby the prevention with eliminate wrong wiring and the unqualified electric quantity measurement mistake that brings of metering device.
The purpose of the utility model is realized through the following technical scheme:
an active detector of an electric energy metering device comprises a test source 1 and a tester 2, wherein the test source 1 and the tester 2 adopt a wireless Zigbee network communication mode to carry out data interaction and control; the test source 1 comprises a battery pack 3, a power supply module 4, a power grid analog signal generator 5, a voltage power amplifier 6, a current power amplifier 7, a booster 8, a current booster 9, a DSP processing and communication module 10, a display module 11, an output interface 12, a voltage current sampling module 13, an A/D conversion module 14 and a wireless communication module 15; the battery pack 3 is connected with a power supply module 4, the power supply module 4 supplies power for the test source 1, the power grid analog signal generator 5 is connected with a voltage power amplifier 6, the voltage power amplifier 6 is connected with a booster 8, and the booster 8 is connected with an output interface 12; the power grid analog signal generator 5 is connected with a current power amplifier 7, the current power amplifier 7 is connected with a current booster 9, and the current booster 9 is connected with an output interface 12; the output interface 12 is connected with the voltage and current sampling module 13, the voltage and current sampling module 13 is connected with the A/D conversion module 14, the A/D conversion module 14 is connected with the DSP processing and communication module 10, the DSP processing and communication module 10 is respectively connected with the power grid analog signal generator 5 and the display module 11, and the wireless communication module 15 is connected with the DSP processing and communication module 10.
The purpose of the utility model can be further realized through the following technical measures:
in the active detector of the electric energy metering device, the tester 2 comprises a clamp interface 16, a voltage and current acquisition module 17, an a/D conversion module 18, a DSP processing and communication module 19, a display module 20 and a power supply module 21; the clamp interface 16 is connected with a voltage and current acquisition module 17, the voltage and current acquisition module 17 is connected with an A/D conversion module 18, the A/D conversion module 18 is connected with a DSP processing and communication module 19, the DSP processing and communication module 19 is connected with a display module 20, and the power supply module 21 supplies power to the voltage and current acquisition module 17, the A/D conversion module 18, the DSP processing and communication module 19 and the display module 20.
Compared with the prior art, the beneficial effects of the utility model are that: the testing method is simple and convenient, the testing result is accurate and reliable, and the checking efficiency of the metering device before operation can be greatly improved. The utility model can be checked under the condition that the electric energy metering device is not electrified, can check the on-site wiring of three-phase three-wire or three-phase four-wire electric energy meters, and can identify the conditions of wiring error, circuit open circuit and the like of the metering device; meanwhile, the transformer transformation ratio testing function is achieved, and whether the transformation ratios of a voltage Transformer (TV) within 35kV and a current Transformer (TA) within 2000A are qualified or not can be conveniently detected. The test source and the tester are matched for use, so that the wiring condition of the metering loop can be rapidly detected and analyzed, the vector diagram is displayed, the vector diagram is visual and vivid, the wrong wiring can be timely corrected, the power supply service quality is improved, and the benefit dispute is avoided; data interaction and control are carried out between a test source and a tester by utilizing wireless Zigbee network communication, and the transformation ratio of a voltage transformer and a current transformer can be directly calculated so as to judge whether the metering device is qualified or not; the device has the advantages of small volume, portability, simple structure, simple and convenient test method, accurate and reliable test result, and capability of greatly improving the inspection efficiency of the metering device before operation.
Drawings
FIG. 1 is a structural diagram of an active detector of the electric energy metering device of the present invention;
FIG. 2 is a diagram of a test source architecture;
FIG. 3 is a block diagram of the tester;
FIG. 4 is a test source operating panel diagram;
FIG. 5 is a display interface diagram of a high voltage three phase three wire test source;
FIG. 6 is a low voltage three phase four wire test source display interface diagram;
FIG. 7 is a diagram of the tester host operating keyboard;
FIG. 8 is a functional interface diagram of the tester display screen wiring;
FIG. 9 is a testing wiring diagram of the high-voltage three-phase three-wire electric energy metering device;
fig. 10 is a test wiring diagram of the low-voltage three-phase four-wire electric energy metering device.
Detailed Description
The invention will be further explained with reference to the drawings and the specific embodiments.
As shown in fig. 1, the utility model discloses active detector of electric energy metering device includes test source 1 and tester 2, adopts wireless Zigbee network communication mode to carry out data interaction and control between these two independent parts. All the components are provided with lithium batteries, and can be used under the condition of no direct power supply. As shown in fig. 2, the test source 1 includes a battery pack 3, a power supply module 4, a grid analog signal generator 5, a voltage power amplifier 6, a current power amplifier 7, a voltage booster 8, a current booster 9, a DSP processing and communication module 10, a display module 11, an output interface 12, a voltage and current sampling module 13, an a/D conversion module 14, and a wireless communication module 15; as shown in fig. 3, the tester 2 includes a clamp interface 16, a voltage and current acquisition module 17, an a/D conversion module 18, a DSP processing and communication module 19, a display module 20, and a power supply module 21.
The system has the following characteristics:
1. testing a source:
the method is characterized in that an imported high-speed digital microprocessor is taken as a core, and a novel specific pulse power device realizes a program-controlled full-electronic test power supply with high stability and high performance; the PWM modulation power amplifier is adopted, so that the output capacity is large, the size is small, the output efficiency is high (> 85%), the heating value is low, the load characteristic is good, the reliability is high, and the fault detection, protection and alarm functions are perfect; the liquid crystal display is matched with a Chinese character operation interface and Chinese character prompt information, so that the man-machine interaction is more convenient; the portable structure is adopted, so that the portable solar water heater is convenient to carry and use on site; the power is supplied by a built-in lithium battery, and the power supplied by the lithium battery can be continuously used for 4 hours.
2. The tester comprises:
the palm design has intuitive wiring and simple and convenient operation; the result is clear by adopting a large-screen dot matrix liquid crystal display; the current is measured by adopting a pincer-shaped current transformer mode, and the measurement operation is quick and convenient; the power is supplied by a built-in lithium battery, and the power supplied by the lithium battery can be continuously used for 4 hours; the common wiring errors of 48 three-phase three-wire and 96 three-phase four-wire types can be identified; the phasor hexagonal diagram is displayed in due time, so that the wiring is convenient to judge; with advanced microprocessors, simultaneous measurements can be made: electric parameters such as three-phase voltage, current, phase and the like; the portable case is matched, and the instrument host and all accessories are packaged in the whole case, so that the portable case is convenient to carry; the tester can be operated by one person, thereby avoiding the traditional line calibration method of two persons in talkback at the two ends of the cable and omitting a communication tool.
The technical indexes are as follows:
test source
And (3) voltage output: 3 × 36V, 3 × 1.5V; and (3) current output: 10A; phase angle: 15 degree
1. The operation panel is as shown in FIG. 4:
1) the 4 interfaces at U1, U2 and U3 are connected with a group of voltage output lines UA, UB, UC and UN (yellow, green, red and black).
2) The 6 interfaces at I1, I2, and I3 are connected to 3 sets of current output lines A, B, C (yellow, green, red).
3) The alarm indicator light is used for indicating whether the voltage and current source output is normal or not, and the light is on to indicate that the voltage and current source output is abnormal.
4) The battery indicator light is used for indicating the current state of the battery.
2. Description of the operation
High-voltage three-phase three-wire operation:
1) connecting a voltage output line: UA, UB and UC are connected with yellow, green and red binding posts corresponding to voltage output, and UN is not connected.
2) And a current output line is connected: IA. The IC is connected to the yellow and red binding posts corresponding to the current output, and the IB is in short circuit.
3) When the power switch is turned on, the liquid crystal display screen is on, and the output display is 0.
4) The voltage transformer selection button is in the "PT once" position.
5) Pressing a start button to output voltage and current; the I2 position light is a normal phenomenon; the phase fixed output is about 15 degrees. Fig. 5 is a display interface diagram of the high-voltage three-phase three-wire test source.
Low voltage three phase four wire operation:
1) connecting a voltage output line: UA, UB, UC and UN are connected to yellow, green, red and black terminals corresponding to voltage output.
2) And a current output line is connected: IA. IB and IC are connected to yellow, green and red binding posts corresponding to current output.
3) When the power switch is turned on, the liquid crystal display screen is on, and the output display is 0.
4) The voltage transformer selection button is in the "no PT" position.
5) Pressing a start button to output voltage and current; the phase-fixed output is 15 °. Fig. 6 is a display interface diagram of a low-voltage three-phase four-wire test source.
(II) electric energy meter wiring tester
Voltage measurement range: 0.5-1.5V; current measurement range: 10 mA-1.5A; phase measurement range: 0 to 360 DEG
1. An operation interface:
the operation keyboard is shown in fig. 7:
number keys: for numerical input at the time of parameter input.
Decimal bond: when the parameter is input, the method is used for decimal point input and can be used as a shortcut key.
An upper key and a lower key: for movement of the parameter setting cursor.
Left and right keys: for the selection of setting item parameters.
A confirmation key: for confirmation of parameter settings and execution of functions.
Power key: for on-off operation.
Cancel key: for the elimination of digits in parameter setting.
Exit key: for cancellation or fallback to the item menu of the test item.
After the tester is connected with the line, the power supply and the switch key are pressed for a long time, the detector is automatically started, and the screen display of the tester automatically enters an electrical testing interface after about 3 seconds. The tester has 4 functional items in total, which are respectively: electrical measurement, wiring, transformation ratio and test.
1) Electrical measurement
Under the function item, the output of the primary side wiring tester can be controlled in a wireless mode. The primary time is information of primary voltage and current input by the mutual inductor, and the secondary time is information of voltage, current and the like at the end of the electric energy meter. The upper right corner "wireless signal" is the connection signal indication between the two devices. During testing, firstly, the wiring mode of the field metering device is selected and set through a left key and a right key: three-phase four-wire low voltage, three-phase three-wire high voltage, and three-phase four-wire high voltage. After the setting is finished, the 'wiring test source' output voltage and current are controlled to be applied once according to the confirmation key. And the wiring tester simultaneously tests the voltage and current information of the secondary induction. And automatically judging the transformation ratio of the voltage transformer and the current transformer according to the primary and secondary voltage and current information. Meanwhile, the line-checking interface can be accessed by pressing the digital key. After the test is finished, the 'connection test source' is controlled to cut off the voltage and current output according to the confirmation key, and the test is finished.
2) Wiring
The function item is mainly used for analyzing the wiring conditions of voltage and current loops of the field metering device, is displayed through a vector diagram, is visual and vivid, and can judge common three-phase three-wire and three-phase four-wire wrong wiring forms. The wiring can be checked and the judgment result can be displayed only according to the load property of the line. The "wiring" item is selected in the item menu and the confirmation key is pressed to run the test module as shown. According to the power factor of the site, the load property is set to be inductive or capacitive through the left key and the right key, and then the line-checking result can be displayed.
3) Transformation ratio
And selecting a 'setting' item in a function item menu, and entering a transformation ratio measuring and calculating function module by pressing a confirmation key.
4) Is provided with
Selecting a 'setting' item in the item menu, pressing a confirmation key to enter a system setting function module: equipment numbering: the numbering of the instrument. Version number: software version of the instrument. The range of the clamp meter is as follows: and switching the internal range of the equipment. And (3) frequency calibration output: the frequency calibration output for setting the instrument is high frequency or low frequency, and the high frequency is 10000 times of the low frequency through left and right key selection. Record clearing: the device memory is cleared by entering the password "8888", the memory is formatted, the memory is reprogrammed, and all stored data is cleared. And (3) data correction: the instrument is debugged by inputting the password and used during maintenance. Setting time and date: for adjusting the internal clock time of the instrument.
And (3) field test operation:
1. three-phase three-wire metering loop wiring test, as shown in FIG. 9 (with high voltage transformer TV)
1) Three voltage output end test lines of a test source UA (yellow line yellow clamp), a test source UB (green line green clamp) and a test source UC (red line red clamp) are clamped on a terminal A, B, C corresponding to a primary side of a voltage Transformer (TV).
2) The test lines of the current IA and the IC output end of the test source are respectively clamped on the primary sides of A, C-phase current Transformers (TA), the IB output end is in short circuit, please note the polarity, the yellow line and the red line are clamped on the inlet end, and the yellow line and the red line are clamped on the outlet end.
3) The PT select button of the test source is selected in the "PT once" position.
4) The yellow and red current clamp type meter of the tester is clamped on the A, C phase current incoming line of the electric energy meter, and the polarity of the clamp meter is noted.
5) And respectively clamping voltage test wire clamps of the tester on corresponding voltage terminals of the electric energy meter, wherein the voltage test wire clamps are yellow, green and red in sequence.
6) And under the condition of ensuring that the test source and the tester are correctly wired, the test source and the tester power switch are turned on.
7) Selecting an electrical testing function module of the tester, selecting a wiring system as a high-voltage three-phase three-wire, pressing a confirming key, controlling the output of a test source by the tester, synchronizing the data of the test source to the tester, and simultaneously testing secondary voltage, current and phase parameters.
8) And entering a wiring function interface of the tester, wherein the interface can display a voltage and current vector diagram and judge the wiring form.
9) And entering a transformation ratio functional interface of the tester, wherein the interface can be used for measuring the transformation ratio of the voltage transformer and the current transformer and judging whether the metering device is qualified or not.
10) After the test is finished, the test source and the tester power supply are closed so as to save the power consumption of the battery and increase the use times.
2. Three-phase four-wire metering loop wiring test, as shown in FIG. 10 (No Voltage Transformer TV)
1) And clamping four voltage output end test lines of the test sources UA (yellow), UB (green), UC (red) and UN (black) on corresponding A, B, C, N copper bars of the low-voltage bus.
2) The test lines of the output ends of the currents IA, IB and IC of the test source are respectively clamped on the primary side of a A, B, C three-phase current transformer TA, please note that the polarity is that a yellow line yellow clamp, a green line green clamp and a red line red clamp are clamped on the wire inlet end, and a yellow line black clamp, a green line black clamp and a red line black clamp are clamped on the wire outlet end.
3) The PT selection button of the test source is selected in the "no PT" position.
4) The yellow, green and red current clamp meters of the tester are respectively clamped on A, B, C phase current incoming lines of a three-phase four-wire electric energy meter, and the polarity of the clamp meters is noticed.
5) And respectively clamping voltage test wire clamps of the tester on corresponding voltage terminals of the electric energy meter, wherein the voltage test wire clamps are yellow, green, red and black in sequence.
6) And under the condition of ensuring that the test source and the tester are correctly wired, the test source and the tester power switch are turned on.
7) Selecting an electrical testing function module of the tester, selecting a wiring system as a low-voltage three-phase four-wire, pressing a confirming key, controlling the output of a test source by the tester, synchronizing the data of the test source to the tester, and simultaneously testing secondary voltage, current and phase parameters.
8) And entering a wiring function interface of the tester, wherein the interface can display a voltage and current vector diagram and judge the wiring form.
9) And entering a transformation ratio functional interface of the tester, wherein the interface can be used for measuring the transformation ratio of the voltage transformer and the current transformer and judging whether the metering device is qualified or not.
10) After the test is finished, the test source and the tester power supply are closed so as to save the power consumption of the battery and increase the use times.
In addition to the above embodiments, the present invention can also have other embodiments, and all technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.
Claims (2)
1. An active detector of an electric energy metering device is characterized by comprising a test source and a tester, wherein the test source and the tester adopt a wireless Zigbee network communication mode to carry out data interaction and control; the test source comprises a battery pack, a power supply module, a power grid analog signal generator, a voltage power amplifier, a current power amplifier, a booster, a current booster, a DSP processing and communication module, a display module, an output interface, a voltage and current sampling module, an A/D conversion module and a wireless communication module; the battery pack is connected with a power supply module, the power supply module supplies power for a test source, the power grid analog signal generator is connected with a voltage power amplifier, the voltage power amplifier is connected with a booster, and the booster is connected with an output interface; the power grid analog signal generator is connected with a current power amplifier, the current power amplifier is connected with a current booster, and the current booster is connected with an output interface; the output interface is connected with the voltage and current sampling module, the voltage and current sampling module is connected with the A/D conversion module, the A/D conversion module is connected with the DSP processing and communication module, the DSP processing and communication module is respectively connected with the power grid analog signal generator and the display module, and the wireless communication module is connected with the DSP processing and communication module.
2. The active detector of claim 1, wherein the tester comprises a clamp interface, a voltage and current acquisition module, an a/D conversion module, a DSP processing and communication module, a display module, and a power module; the clamp interface is connected with the voltage and current acquisition module, the voltage and current acquisition module is connected with the A/D conversion module, the A/D conversion module is connected with the DSP processing and communication module, the DSP processing and communication module is connected with the display module, and the power supply module supplies power for the voltage and current acquisition module, the A/D conversion module, the DSP processing and communication module and the display module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920756699.2U CN210090657U (en) | 2019-05-24 | 2019-05-24 | Active detector of electric energy metering device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920756699.2U CN210090657U (en) | 2019-05-24 | 2019-05-24 | Active detector of electric energy metering device |
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| CN210090657U true CN210090657U (en) | 2020-02-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110058188A (en) * | 2019-05-24 | 2019-07-26 | 国网江苏省电力有限公司镇江供电分公司 | The active detector of electric energy metering device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110058188A (en) * | 2019-05-24 | 2019-07-26 | 国网江苏省电力有限公司镇江供电分公司 | The active detector of electric energy metering device |
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