CN201637770U - Three-phase electronic type carrier multi-rate valve-controlled electric energy meter - Google Patents
Three-phase electronic type carrier multi-rate valve-controlled electric energy meter Download PDFInfo
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- CN201637770U CN201637770U CN2009201010734U CN200920101073U CN201637770U CN 201637770 U CN201637770 U CN 201637770U CN 2009201010734 U CN2009201010734 U CN 2009201010734U CN 200920101073 U CN200920101073 U CN 200920101073U CN 201637770 U CN201637770 U CN 201637770U
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Abstract
The utility model relates to a three-phase electronic type carrier multi-rate valve-controlled electric energy meter which comprises a multi-rate metering unit, a remote control circuit, current sampling amplification circuits U5 and U6, a voltage sampling circuit, a central processing unit CPU and a communication interface circuit, wherein each current sampling amplification circuit in the electric energy meter further comprises a current transformer; the output of the current transformer is connected to a sampling resistor R35 and becomes a voltage signal which is connected into operational amplifiers U5 and U6 for amplification, the amplification factor is selected by the program, the amplified signal is connected into the input end of the central processing unit CPU by a resistor R40 and a capacitor C16 in a filter circuit; and the voltage sampling circuit in the electric energy meter comprises potential-divider network resistors R11-R17, and an external high-voltage signal becomes a weak current signal which is connected into the central processing unit CPU after passing a filter circuit R18, a C8 and an overvoltage protection circuit D7. The three-phase electronic type carrier multi-rate valve-controlled electric energy meter has the advantages of high precision, good stability, reasonable distribution, advanced process, and capability of accurately and fast carrying out measurement and calculation on various electric parameters.
Description
Technical field
The utility model relates to a kind of electronic device, especially relates to a kind of operation of power networks charging, Long-distance Control, harvester.
Background technology
At present, electric system is at load during the peak, often power cuts to limit consumption; When load valley, then waste seriously, cause the hydroelectric power plant to abandon water in a large number, the long-time underrun of thermal power plant.Simultaneously Utilities Electric Co. exists that difficulty is collected in the electricity charge, arrearage is serious with electrical phenomena.Develop a kind of many rates of three-phase electronic carrier wave valve control electric energy meter at my company of this kind situation, multiple rate writes down power consumption respectively by the peak and low valley time exactly, so that collect the electricity charge by different prices, encourage the user initiatively to take the measure of avoiding apex filling vale, be beneficial to supply and demand electricity both sides.Valve control function is reminded brownout when arrearage when electricity consumption enterprise exactly when the electricity charge are not enough.
Summary of the invention
The purpose of this utility model is to overcome the weak point that exists in the above-mentioned technology, provides a kind of simple in structure, reasonable in design, many rates of three-phase electronic carrier wave valve control electric energy meter of stable and reliable operation.
In order to achieve the above object; the technical solution adopted in the utility model is: comprise central processing unit CPU; programmable operational amplifier; also comprise multiple rate metering units; circuit for remotely controlling; current sample amplifying circuit U5; U6; voltage sampling circuit; central processing unit CPU and communication interface circuit; the current sample amplifying circuit also comprises current transformer in the described electric energy meter; the output of current transformer is received on the sampling resistor R35 and is become voltage signal; voltage signal inserts operational amplifier U5; U6 amplifies; by the procedure Selection enlargement factor; signal after the amplification is the resistance R 40 in the wave circuit after filtration; capacitor C 16 inserts the central processing unit CPU input end; voltage sampling circuit comprises resistance pressure-dividing network resistance R 11 in the described electric energy meter; R12; R13; R14; R15; R16; R17; the external high voltage signal is become weak electric signal, and this weak electric signal is wave circuit R18 after filtration; insert central processing unit CPU behind C8 and the overvoltage crowbar D7.
The utility model has the advantages that:
The novel intelligent electric energy meter of many rates of three-phase electronic carrier wave valve control electric energy meter sophistication design, have precision height, good stability, rationally distributed, technology is advanced, characteristics such as practical, powerful, easy to operate, can measure calculating to all kinds of electrical quantitys accurately and quickly, charge according to the predefined period, but the user of distant place prompting simultaneously pays dues, the function that limited subscriber uses during arrearage.
Description of drawings
Fig. 1 is the utility model block diagram;
Fig. 2 is the utility model circuit for remotely controlling schematic diagram;
Fig. 3 is the utility model current sample amplifying circuit schematic diagram;
Fig. 4 is the utility model voltage sampling circuit schematic diagram;
Fig. 5 is the utility model interface microcontroller circuit theory diagrams;
Fig. 6 is the utility model communication interface circuit schematic diagram;
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
By Fig. 1-Fig. 6 as can be known; the utility model comprises central processing unit CPU; programmable operational amplifier; also comprise multiple rate metering units; circuit for remotely controlling; current sample amplifying circuit U5; U6; voltage sampling circuit; central processing unit CPU and communication interface circuit; the current sample amplifying circuit also comprises current transformer in the described electric energy meter; the output of current transformer is received on the sampling resistor R35 and is become voltage signal; voltage signal inserts operational amplifier U5; U6 amplifies; by the procedure Selection enlargement factor; signal after the amplification is the resistance R 40 in the wave circuit after filtration; capacitor C 16 inserts the central processing unit CPU input end; voltage sampling circuit comprises resistance pressure-dividing network resistance R 11 in the described electric energy meter; R12; R13; R14; R15; R16; R17; the external high voltage signal is become weak electric signal, and this weak electric signal is wave circuit R18 after filtration; insert central processing unit CPU behind C8 and the overvoltage crowbar D7.
Communication interface circuit in the described electric energy meter comprises that infrared communication interface, RS485 interface and carrier communication interface and electric energy meter central processing unit CPU set up the bi-directional exchanges of information passage.
The utility model adopts current transformer in current detecting, on-the-spot 3 road current signals are become the current signal of 0-7.5mA, the process sampling resistor becomes the voltage signal of 0-3V, sends into Chip Microcomputer A/D transducer by high-frequency filter circuit and programmable operational amplifier and converts digital signal to.Voltage detecting adopts the resistor network dividing potential drop, and 3 road 220V forceful electric power conversion of signals are become the weak electric signal of 0-3V, and other 3 road A/D transducers that this signal is sent into single-chip microcomputer after by high-frequency filter circuit and programmable operational amplifier convert digital signal to.Single-chip microcomputer is obtained the electric current and voltage digital signal of discretize by the A/D circuit, by software filtering filtering clutter and interference, sending into computing unit calculates, can obtain instantaneous values such as required voltage, electric current, power, power factor, frequency after the calculating, accumulative total by the time can obtain active energy, have hardware clock circuit in the electric energy meter, can write down the electric energy data of point, peak, flat, paddy at record in total electric energy respectively, as the foundation of charge.
Claims (2)
1. many rates of three-phase electronic carrier wave valve control electric energy meter; comprise central processing unit CPU; programmable operational amplifier; it is characterized in that: also comprise multiple rate metering units; circuit for remotely controlling; current sample amplifying circuit U5; U6; voltage sampling circuit; central processing unit CPU and communication interface circuit; the current sample amplifying circuit also comprises current transformer in the described electric energy meter; the output of current transformer is received on the sampling resistor R35 and is become voltage signal; voltage signal inserts operational amplifier U5; U6 amplifies; by the procedure Selection enlargement factor; signal after the amplification is the resistance R 40 in the wave circuit after filtration; capacitor C 16 inserts the central processing unit CPU input end; voltage sampling circuit comprises resistance pressure-dividing network resistance R 11 in the described electric energy meter; R12; R13; R14; R15; R16; R17; the external high voltage signal is become weak electric signal, and this weak electric signal is wave circuit R18 after filtration; insert central processing unit CPU behind C8 and the overvoltage crowbar D7.
2. many rates of three-phase electronic carrier wave valve control electric energy meter according to claim 1 is characterized in that: the communication interface circuit in the described electric energy meter comprises that infrared communication interface, RS485 interface and carrier communication interface and electric energy meter central processing unit CPU set up the bi-directional exchanges of information passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201010734U CN201637770U (en) | 2009-10-15 | 2009-10-15 | Three-phase electronic type carrier multi-rate valve-controlled electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201010734U CN201637770U (en) | 2009-10-15 | 2009-10-15 | Three-phase electronic type carrier multi-rate valve-controlled electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201637770U true CN201637770U (en) | 2010-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201010734U Expired - Fee Related CN201637770U (en) | 2009-10-15 | 2009-10-15 | Three-phase electronic type carrier multi-rate valve-controlled electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201637770U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707138A (en) * | 2012-05-23 | 2012-10-03 | 福建顺昌虹润精密仪器有限公司 | Panel-mounted three-phase integrated coulombmeter based on DSC (dynamic stability control) technology |
| CN103956714A (en) * | 2014-04-24 | 2014-07-30 | 合肥沃华电气技术有限公司 | High-sensitivity multifunctional CT open circuit protection device |
| CN104348508A (en) * | 2013-08-02 | 2015-02-11 | 活点信息技术有限公司 | Communication circuit based on current modulation |
| CN106953333A (en) * | 2017-05-13 | 2017-07-14 | 深圳国电粤能节能科技有限公司 | A kind of intelligence relaying supply unit and a kind of closed-loop feed-back type voltage control method |
-
2009
- 2009-10-15 CN CN2009201010734U patent/CN201637770U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707138A (en) * | 2012-05-23 | 2012-10-03 | 福建顺昌虹润精密仪器有限公司 | Panel-mounted three-phase integrated coulombmeter based on DSC (dynamic stability control) technology |
| CN102707138B (en) * | 2012-05-23 | 2015-01-21 | 福建顺昌虹润精密仪器有限公司 | Panel-mounted three-phase integrated coulombmeter based on DSC (dynamic stability control) technology |
| CN104348508A (en) * | 2013-08-02 | 2015-02-11 | 活点信息技术有限公司 | Communication circuit based on current modulation |
| CN103956714A (en) * | 2014-04-24 | 2014-07-30 | 合肥沃华电气技术有限公司 | High-sensitivity multifunctional CT open circuit protection device |
| CN103956714B (en) * | 2014-04-24 | 2016-09-07 | 合肥沃华电气技术有限公司 | A kind of high sensitivity multi-functional CT open-circuit protecting device |
| CN106953333A (en) * | 2017-05-13 | 2017-07-14 | 深圳国电粤能节能科技有限公司 | A kind of intelligence relaying supply unit and a kind of closed-loop feed-back type voltage control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101117 Termination date: 20171015 |