CN204631186U - A kind of phase three-wire three supply line decompression calculagraph - Google Patents
A kind of phase three-wire three supply line decompression calculagraph Download PDFInfo
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- CN204631186U CN204631186U CN201520171280.2U CN201520171280U CN204631186U CN 204631186 U CN204631186 U CN 204631186U CN 201520171280 U CN201520171280 U CN 201520171280U CN 204631186 U CN204631186 U CN 204631186U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
The utility model discloses a kind of phase three-wire three supply line decompression calculagraph, it comprises for providing the power circuit of working power, the MCU microprocessor connecting the data output end of described ic for energy metering for ic for energy metering, the data input pin using electric energy to measure to user, communication interface circuit, for controlling the control relay circuit of external alert circuit, communication interface circuit comprises infra red communication port circuits and networks communication interface circuit, is also provided with isolation protective circuit in communication interface circuit; The utility model can realize line fault detection, accurate measurement, automatic data logging and circuit protection; data can networking transmitted in both directions; thus realize the detection of line voltage event of failure, warning, record; and electricity is lost in metering; being power supply unit examination power supply quality and the important technical lowering the line loss that stealing causes, is a kind of decompression calculagraph of the phase three-wire three supply line being applicable to wideling popularize.
Description
Technical field
The utility model relates to electric instrument technical field, particularly relates to a kind of phase three-wire three supply line decompression calculagraph.
Background technology
The design proposal of the decompression calculagraph of existing record phase three-wire three supply line both domestic and external no-voltage fault generally has following two kinds:
1, electromechanical integration scheme, by independently voltage, current detection circuit, clock circuit, message register form.The advantage of this scheme is that the simple cost of circuit is low, and shortcoming is that clock accuracy is low, and function is few, electric energy cannot be used and loses electric energy by metering user, poor reliability, does not reach the technical requirement of decompression calculagraph national standard, can only be used for designing easy data monitoring instrument.
2, full-electronic scheme, selects special-purpose multifunctional signals collecting and electric energy computation chip, external hardware clock chip and single-chip microcomputer, memory circuit, display circuit, communicating circuit etc.The data such as relevant voltage, electric current, the power factor of being sampled by special-purpose multifunctional signals collecting and electric energy computation chip, the meritorious forward and reverse electricity of metering.By single-chip microcomputer by reading in real time the data of signals collecting and electric energy computation chip, realizing the measure voltage & current of each phase of three-phase circuit, recording pressure loss, defluidization event of failure, accumulative fault-time and user and use electric energy and lose electric energy, realize the calculating of data, display, communication, storage and controlling alarm.Advantage is that function is many, metering and clock accuracy high, reliability is high, can meet the technical requirement of State Grid Corporation of China to decompression calculagraph national standard; Shortcoming is that circuit is slightly complicated, and cost is slightly high, is applicable to the senior instrument of design.
On the communication modes of decompression calculagraph, for being applicable to the different application scenarios such as rural area, city, factory, there is the technical scheme of the decompression calculagraph comprising the meter reading methods such as infrared communication, RS485 serial communication, power communication.But above-mentioned decompression calculagraph lacks anti-lightning strike and forceful electric power misconnection design, when thunderbolt and forceful electric power misconnection, easily causes communicating circuit to damage, affects electric energy metrical.
Summary of the invention
For overcoming the deficiencies in the prior art, the utility model provide a kind of there is defencive function, accurately can record phase three-wire three supply line decompression, the phase three-wire three supply line decompression calculagraph of defluidization time parameter.
The utility model for the technical scheme reaching above-mentioned technical purpose and adopt is: a kind of phase three-wire three supply line decompression calculagraph, comprising:
For providing the power circuit of working power;
For detecting phase three-wire three supply line decompression, defluidization fault, and electric energy is used to user and loses the ic for energy metering that electric energy measured, gathered electric network data;
MCU microprocessor, its data input pin connects the data output end of described ic for energy metering;
Communication interface circuit, comprises infra red communication port circuits and networks communication interface circuit, and infra red communication port circuit connects the infrared input/output terminal of described MCU microprocessor, and network communication interface circuit connects the network input/output terminal of described MCU microprocessor;
For controlling the control relay circuit of external alert circuit, with described MCU microprocessor-based control output terminal.
Described network communication interface circuit is also provided with protection circuit, and described protection circuit comprises:
For realizing the first photoelectrical coupler of electrical isolation, its output terminal is connected with the network input of described MCU microprocessor;
For realizing the second photoelectrical coupler of electrical isolation, its input end is connected with the network output of described MCU microprocessor;
Network transceivers, its receiver output terminal connects the input end of described first photoelectrical coupler, and its driver input end connects the output terminal of described second photoelectrical coupler;
TVS diode, is connected between the homophase input/output terminal of described network transceivers and reverse input/output terminal;
First thermistor, its one end connects the homophase input/output terminal of described network transceivers;
Second thermistor, its one end connects the anti-phase input output terminal of described network transceivers;
Network communication interface connector, connects the other end of described first thermistor and described second thermistor.
Described ic for energy metering comprises the current sampling circuit of sampling to input phase three-wire three supply line electric current, the voltage sampling circuit of sampling to input phase three-wire three supply line voltage and is connected the electric energy computation chip of signal output part of described current sampling circuit and voltage sampling circuit.
Described three-phase electrical energy computation chip is ATT7022E chip.
Described MCU microprocessor chip is PIC18F67J11 chip.
Described power circuit is provided with phase three-wire three 3*220V alternating current input end and two-way DC series linear power supply output terminal.
Described series connection linear power supply comprises one and secondaryly has power transformer that two-way exports and one and the 3rd thermistor of described power transformer primary series, one with the first voltage dependent resistor (VDR) of described power transformer primary parallel, a power transformer wherein road exports and provides independent current source to described network communication interface circuit.
Described control relay circuit comprises the relay drive circuit be connected with described MCU microprocessor-based control output terminal for receiving alarm control signal; The relay for being switched on or switched off external alert circuit power is connected with the output terminal of described relay drive circuit; Utilize relay output alarm signal, user can external warning circuit or o-volt protection circuit.
Also comprise in decompression calculagraph for providing the clock circuit of signal source of clock for phase three-wire three supply line decompression, defluidization fault cumulative time record, described clock circuit adopts the hardware clock chip RX8025SA with temperature compensation function.
The beneficial effects of the utility model are:
1, be provided with the protection circuit be made up of TVS diode, the first thermistor and the second thermistor in network communication interface circuit of the present utility model, protection circuit can prevent from being struck by lightning or forceful electric power misconnection time infringement to circuit;
2, network communication interface circuit of the present utility model adopts independent current source to power, signal between its with MCU microprocessor is connected employing first photoelectrical coupler and the second photoelectrical coupler realizes electrical isolation, effectively prevent when network communication interface damages the electric quantity metering of whole electric energy meter and the impact of timework;
3, decompression calculagraph of the present utility model has the function that metering user makes power consumption and loses electricity;
4, MCU microprocessor of the present utility model is by connecting control relay circuit, makes the function of the external warning circuit of decompression calculagraph.
In sum; the utility model decompression calculagraph realizes line fault detection, accurate measurement, automatic data logging and circuit protection; data can networking transmitted in both directions; thus realize the detection of line voltage event of failure, warning, record; and electricity is lost in metering; being power supply unit examination power supply quality and the important technical lowering the line loss that stealing causes, is a kind of decompression calculagraph of the phase three-wire three supply line being applicable to wideling popularize.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.Wherein:
Fig. 1 is the system architecture schematic diagram of the utility model phase three-wire three supply line decompression calculagraph;
Fig. 2 is the circuit diagram of the utility model MCU microprocessor;
Fig. 3 is the circuit diagram of the utility model electric energy computation chip;
Fig. 4 is the utility model three-phase three-line voltage sample circuit figure;
Fig. 5 is the utility model phase three-wire three current sampling circuit figure;
Fig. 6 is the structural representation of the utility model communication interface circuit;
Fig. 7 is the circuit diagram of the utility model communication interface circuit;
Fig. 8 a is the circuit diagram of the utility model infrared receiving circuit;
Fig. 8 b is the circuit diagram of the utility model infrared transmitting circuit;
Fig. 9 is the circuit diagram of the utility model power circuit;
Figure 10 is the circuit diagram of the utility model control relay circuit;
Figure 11 is the circuit diagram of the utility model clock circuit.
Embodiment
By describing technology contents of the present utility model, structural attitude in detail, realized object and effect, accompanying drawing is coordinated to describe in detail below in conjunction with embodiment.
Refer to shown in Fig. 1 to Fig. 5, the utility model phase three-wire three supply line decompression calculagraph comprises for providing the power circuit 1 of working power, the MCU microprocessor 3 connecting the data output end of described ic for energy metering 2 for ic for energy metering 2, the data input pin using electric energy to measure to user, communication interface circuit 4, for controlling the control relay circuit 5 of external alert circuit;
Ic for energy metering 2 realizes the voltage and current signal sampling of wide frequency domain, ic for energy metering 2 adopts special-purpose multifunctional electric energy computation chip, the data such as voltage, electric current, power factor relevant with electric energy metrical by the sampling of special-purpose multifunctional electric energy computation chip, the meritorious forward and reverse electricity of metering, processes for MCU microprocessor 3;
Described ic for energy metering 2 comprises the voltage sampling circuit of sampling to input voltage, to the current sampling circuit that input current is sampled, connect the electric energy computation chip of signal output part of described voltage sampling circuit, current sampling circuit, ic for energy metering selects high precision electric energy metrical special chip ATT7022E, and it can ensure measuring accuracy and the linearity under complex environment condition.
Described MCU microprocessor 3 adopts PIC18F86J90 chip, described PIC18F86J90 chip carries out digital communication by spi bus and electric energy computation chip ATT7022E, read the electric quantity data on computation chip and electrical network analog parameter, and it analyzed, process, store, communication, display to be to realize the intellectuality of ammeter.
Refer to shown in Fig. 6 and Fig. 7, communication interface circuit 4 comprises two tunnels independently infra red communication port circuit and RS485 communicating circuit, infra red communication port circuit is used for scene and checks meter, infra red communication port circuit connects the infrared input/output terminal of described MCU microprocessor, RS485 network communication interface circuit is used for remote meter reading, and RS485 network communication interface circuit connects the network input/output terminal of described MCU microprocessor.
Described infra red communication port circuit and RS485 communicating circuit are as the basic communication function of decompression calculagraph, electric power carrier communication function, WI-FI wireless communication function or other communication modes (as ZIGBEE wireless communication function, optical-fibre communications, GPRS communication) can also be further expanded, the communicating circuit of these expansions can be designed to external independent remote communication module, can by user's choice for use.
Be provided with anti-lightning strike and protection circuit that is overcurrent proof misconnection in RS485 communication interface circuit, described protection circuit comprises:
Photoelectrical coupler TP4, output terminal connects MCU microprocessor 3;
Photoelectrical coupler TP6, input end connects MCU microprocessor 3;
Transceiver ic 7 adopts chip HM3085EESA, and its receiver output pin 1 connects the input of TP4, and its receiver output enable pin 2 is connected the output of TP6 with driver output enable pin 3;
TVS diode D12, it is connected between the homophase input and output pin 6 of HM3085EESA and anti-phase input output pin 7;
Thermistor RVT1, its one end connects the anti-phase input output pin 7 of HM3085EESA, and the other end connects RS485 lead-out terminal A;
TVS diode DV1, it is connected between RS485 lead-out terminal A and B;
The homophase input and output pin 6 of HM3085EESA connects RS485 lead-out terminal B;
RS485 communication interface circuit adopts independent current source to power, and is connected and adopts TP4 and TP6 to realize electrical isolation, avoid the damage because of communication interface to affect the gage work of integrated circuit with the signal between main circuit.
During thunderbolt, energy is absorbed by the TVS diode D12 in protection circuit, DV1, and thermistor RVT1 carries out open circuit protection in the moment that line current increases, thus prevents thunderbolt and forceful electric power misconnection to the infringement of circuit.
Refer to shown in Fig. 8 a and Fig. 8 b, described infra red communication port circuit comprises infrared receiving circuit and infrared transmitting circuit, infrared receiving circuit comprises infrared remote receiver US, adopt chip FM-9038LM, its output pin connects MCU microprocessor, infrared transmitting circuit comprises triode T2, T3, T3 base stage connects MCU microprocessor 3 by resistance R54, infrared transmitting tube L1, its negative electrode connects the emitter of T3, anode connects 3.3V voltage, triode T2, its base stage connects MCU microprocessor 3 by resistance R51, launch collection ground connection, collector is by resistance R53, R531 connects the collector of described T3.
In the present embodiment, PIC18F86J90 chip pin 5(RXD1) with pin 4(TXD1) be connected with RS485 network communication interface circuit, its pin 58(TXDH) with pin 60(RXDH) be connected infra red communication port circuit, pin 53(DIN1), pin 54(DOUT1), pin 49(CS1), pin 52(SCLK1) be connected with ATT7022E AU.
Refer to shown in Fig. 9, described power circuit comprise there is two-way and export high reliability, electromagnetism interference, low-power consumption series connection linear power supply, comprise secondary there is power transformer TBX1, TBX3 and described TBX1, TBX3 primary series that two-way exports thermistor RVT1, RVT3, and pressure-sensitive RVA, RVC of described TBX1, TBX3 primary parallel and rectifier bridge, three-terminal voltage-stabilizing circuit, filtering circuit.
Described power circuit has superpotential defencive function; by elementary RVT1, the RVT3 of first connecting at power transformer TBX1, TBX3; the electrical resistance voltage of voltage dependent resistor (VDR) RVA in parallel, RVC increases and reduces again; the shunt of a low-resistance is formed at overvoltage moment RVA, RVC; at this moment thermistor be rapidly heated because of overcurrent resistance become finally form open circuit greatly; protection transformer TBX1, TBX3 both end voltage can not rise further, and then protection subsequent conditioning circuit.
Power transformer TBX1, TBX3 level have two-way to export, one tunnel supply primary power uses, another road is specialized in and is used to network communication interface circuit, such design can ensure the collapse that can not cause whole power supply when RS485 communication interface circuit is attacked by forceful electric power, ensures that metering circuit can also normally work.
Refer to shown in Figure 10, control relay circuit comprise be connected with the control output end of described MCU microprocessor 3 for receiving the relay drive circuit forfeiting electric control signal; The relay for being switched on or switched off input power be connected with the output terminal of described relay drive circuit.
The pin 44 that mouth (i.e. one end JD of resistance R41) connects MCU microprocessor is transmitted in the electric control " ON/OFF " of forfeiting of relay drive circuit.
Refer to shown in Figure 11, also comprise in decompression calculagraph for providing the clock circuit of signal source of clock for phase three-wire three supply line decompression, defluidization fault cumulative time record, described clock circuit adopts the hardware clock chip RX8025SA with temperature compensation function.
Except foregoing circuit, the utility model also comprises the circuit commons such as LCD display circuit, LED indicating circuit, data storage circuitry, output of pulse signal circuit.
The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalent structure transformation utilizing the utility model instructions and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (9)
1. a phase three-wire three supply line decompression calculagraph, is characterized in that: comprising:
For providing the power circuit of working power;
For detecting phase three-wire three supply line decompression, defluidization fault, and electric energy is used to user and loses the ic for energy metering that electric energy measured, gathered electric network data;
MCU microprocessor, its data input pin connects the data output end of described ic for energy metering;
Communication interface circuit, comprises infra red communication port circuits and networks communication interface circuit, and infra red communication port circuit connects the infrared input/output terminal of described MCU microprocessor, and network communication interface circuit connects the network input/output terminal of described MCU microprocessor;
For controlling the control relay circuit of external alert circuit, with described MCU microprocessor-based control output terminal.
2. a kind of phase three-wire three supply line according to claim 1 decompression calculagraph, is characterized in that: described network communication interface circuit is also provided with protection circuit, and described protection circuit comprises:
For realizing the first photoelectrical coupler of electrical isolation, its output terminal is connected with the network input of described MCU microprocessor;
For realizing the second photoelectrical coupler of electrical isolation, its input end is connected with the network output of described MCU microprocessor;
Network transceivers, its receiver output terminal connects the input end of described first photoelectrical coupler, and its driver input end connects the output terminal of described second photoelectrical coupler;
TVS diode, is connected between the homophase input/output terminal of described network transceivers and reverse input/output terminal;
First thermistor, its one end connects the homophase input/output terminal of described network transceivers;
Second thermistor, its one end connects the anti-phase input output terminal of described network transceivers;
Network communication interface connector, connects the other end of described first thermistor and described second thermistor.
3. a kind of phase three-wire three supply line according to claim 1 decompression calculagraph, is characterized in that: described ic for energy metering comprises the current sampling circuit of sampling to input phase three-wire three supply line electric current, the voltage sampling circuit of sampling to input phase three-wire three supply line voltage and is connected the electric energy computation chip of signal output part of described current sampling circuit and voltage sampling circuit.
4. a kind of phase three-wire three supply line according to claim 3 decompression calculagraph, is characterized in that: described three-phase electrical energy computation chip is ATT7022E chip.
5. a kind of phase three-wire three supply line according to claim 1 decompression calculagraph, is characterized in that: described MCU microprocessor chip is PIC18F67J11 chip.
6. a kind of phase three-wire three supply line according to claim 1 decompression calculagraph, is characterized in that: described power circuit is provided with phase three-wire three 3*220V alternating current input end and two-way DC series linear power supply output terminal.
7. a kind of phase three-wire three supply line according to claim 6 decompression calculagraph, it is characterized in that: described series connection linear power supply comprises one and secondaryly has power transformer that two-way exports and one and the 3rd thermistor of described power transformer primary series, one with the first voltage dependent resistor (VDR) of described power transformer primary parallel, a power transformer wherein road exports and provides independent current source to described network communication interface circuit.
8. a kind of phase three-wire three supply line according to claim 1 decompression calculagraph, is characterized in that: described control relay circuit comprises the relay drive circuit be connected with described MCU microprocessor-based control output terminal for receiving alarm control signal; The relay for being switched on or switched off external alert circuit power is connected with the output terminal of described relay drive circuit.
9. a kind of phase three-wire three supply line according to claim 1 decompression calculagraph, it is characterized in that: also comprise for providing the clock circuit of signal source of clock for phase three-wire three supply line decompression, defluidization fault cumulative time record, described clock circuit adopts the hardware clock chip RX8025SA with temperature compensation function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520171280.2U CN204631186U (en) | 2015-03-25 | 2015-03-25 | A kind of phase three-wire three supply line decompression calculagraph |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520171280.2U CN204631186U (en) | 2015-03-25 | 2015-03-25 | A kind of phase three-wire three supply line decompression calculagraph |
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| CN204631186U true CN204631186U (en) | 2015-09-09 |
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| CN201520171280.2U Expired - Fee Related CN204631186U (en) | 2015-03-25 | 2015-03-25 | A kind of phase three-wire three supply line decompression calculagraph |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109375145A (en) * | 2018-09-26 | 2019-02-22 | 深圳供电局有限公司 | No-voltage fault monitoring method and device based on phase three-wire three meter equipment |
-
2015
- 2015-03-25 CN CN201520171280.2U patent/CN204631186U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109375145A (en) * | 2018-09-26 | 2019-02-22 | 深圳供电局有限公司 | No-voltage fault monitoring method and device based on phase three-wire three meter equipment |
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| 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: 20150909 Termination date: 20170325 |