CN103217574B - A kind of electric energy data checks the metering outfit of instrument - Google Patents

A kind of electric energy data checks the metering outfit of instrument Download PDF

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Publication number
CN103217574B
CN103217574B CN201310090396.9A CN201310090396A CN103217574B CN 103217574 B CN103217574 B CN 103217574B CN 201310090396 A CN201310090396 A CN 201310090396A CN 103217574 B CN103217574 B CN 103217574B
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electric capacity
terminal
connects
resistance
circuit
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CN103217574A (en
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陆磊
袁晓明
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SHANGHAI RUNPOWER INFORMATION TECHNOLOGY Co Ltd
State Grid Corp of China SGCC
Shanghai Municipal Electric Power Co
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SHANGHAI RUNPOWER INFORMATION TECHNOLOGY Co Ltd
State Grid Corp of China SGCC
Shanghai Municipal Electric Power Co
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Abstract

The present invention relates to the metering outfit that a kind of electric energy data checks instrument, comprise voltage sampling circuit, current sampling circuit, computation chip, main control chip, storer and power circuit, described computation chip connects voltage sampling circuit and current sampling circuit respectively, and described main control chip connects computation chip, storer respectively.Compared with prior art, the present invention has the advantages such as measuring accuracy is high, good operation stability.

Description

A kind of electric energy data checks the metering outfit of instrument
Technical field
The present invention relates to a kind of electrical energy metering equipment, especially relate to a kind of metering outfit checking instrument for electric energy data.
Background technology
The Data Source become more meticulous when foreground partition line loss is mainly divided into supply side and sale of electricity side, and as a line loss unit, platform district line loss is because the relative complexity of platform district supply network and the diversity of electricity consumption are the difficult points of Controlling line loss always.In the Controlling line loss work of reality, for the platform district of line loss exception, often often there is controversial situation in a part of platform district, namely all do not see there is what problem for the method that sale of electricity side electricity is traditional, but line loss per unit calculates very large.Because supply side data source is more single, first the accuracy determining supply side data is needed for controversial district.Current have two kinds usually for this problem, and the first changes table, and the second is two pieces of table paired runnings.These two kinds of modes all need to have a power failure to user, reduce power supply reliability and energy data available rate, and after issue table tears table open, censorship needs the longer cycle, for the table of this no problem, are a kind of wastes.Need to be checked electricity energy data by a kind of instrument, analyze and determine the reason of line loss exception, therefore needing to design the high metering outfit of a kind of measuring accuracy.
Summary of the invention
Object of the present invention is exactly provide a kind of to overcome defect that above-mentioned prior art exists to check the high metering outfit of the measuring accuracy of instrument for electric energy data.
Object of the present invention can be achieved through the following technical solutions:
A kind of electric energy data checks the metering outfit of instrument, comprise voltage sampling circuit, current sampling circuit, computation chip, main control chip, storer and power circuit, described computation chip connects voltage sampling circuit and current sampling circuit respectively, and described main control chip connects computation chip, storer respectively.
Described voltage sampling circuit comprises three identical single-phase sampling electronic circuits of circuit structure, one end of three single-phase sampling electronic circuits connects N phase, the other end connects A phase, B phase and C phase respectively, each single-phase sampling electronic circuit comprises divider resistance, sampling resistor, the first electric capacity and the second electric capacity, described divider resistance and sampling resistor series connection, after the first described electric capacity and the second Capacitance parallel connection, one end connects the common point of divider resistance and sampling resistor, and one end leads to computation chip as voltage sample lead-out terminal.
Described current sampling circuit comprises the first current transformer, the second current transformer, the 3rd current transformer, the first resistance, the second resistance and the 3rd resistance, one of them terminal of the Secondary Winding of three current transformers is interconnected, another terminal leads to computation chip as current sample lead-out terminal, and the first described resistance, the second resistance and the 3rd resistance are connected between two terminals of the first current transformer, the second current transformer, the 3rd secondary winding in current transformer.
Described storer is EEPROM.
Described power circuit comprises adjustable resistance, transformer, full bridge inverter, 3rd electric capacity, 4th electric capacity, 5th electric capacity, 6th electric capacity, 7th electric capacity, three-terminal voltage-stabilizing chip, first diode, second diode and a direct supply, transformer inputs connects external communication source, adjustable resistance is connected between two input terminals of transformer inputs, the output terminal of transformer connects the input end of full bridge inverter, a lead-out terminal of full bridge inverter output terminal connects the input terminal of three-terminal voltage-stabilizing chip, another lead-out terminal ground connection of full bridge inverter output terminal, after 3rd electric capacity and the 4th Capacitance parallel connection, its one end connects the input terminal of three-terminal voltage-stabilizing chip, other end ground connection, the lead-out terminal of described three-terminal voltage-stabilizing chip connects the 5th electric capacity, one end of 6th electric capacity and the anode of the first diode, the other end ground connection of the 5th electric capacity and the 6th electric capacity, the negative electrode of the first diode connects one end of the 7th electric capacity and the negative electrode of the second diode, the other end ground connection of the 7th electric capacity, the minus earth of described direct supply, positive pole connects the anode of the second diode, the lead-out terminal of described three-terminal voltage-stabilizing chip is exported by the first via of drawing as power circuit, the negative electrode of the first diode is exported by second tunnel of drawing as power circuit.
The 3rd described electric capacity, the 5th electric capacity and the 7th electric capacity are electrochemical capacitor, and one end of its ground connection is negative pole.
Compared with prior art, the present invention is by voltage sampling circuit and current sampling circuit, respectively electric current and voltage sample are carried out to the A phase of mains supply side, B phase and C phase circuit, then added up by computation chip, very high measuring accuracy can be reached, for the analysis of follow-up line loss exception provides good data qualification, adopt rational power circuit to design in addition, improve the operation stability of metering outfit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the circuit diagram of voltage sampling circuit;
Fig. 3 is the circuit diagram of current sampling circuit;
Fig. 4 is the circuit diagram of power circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
As shown in Figure 1, a kind of electric energy data checks the metering outfit of instrument, comprise voltage sampling circuit 1, current sampling circuit 2, computation chip 3, main control chip 4, storer 5 and power circuit 6, computation chip 3 connects voltage sampling circuit 1 and current sampling circuit 2 respectively, main control chip 4 connects computation chip 3, storer 5 respectively, the all parts that power circuit 6 is metering outfit provides power supply, and storer 5 adopts EEPROM.
Wherein, the particular circuit configurations of voltage sampling circuit as shown in Figure 2, comprise three identical single-phase sampling electronic circuits of circuit structure, one end of three single-phase sampling electronic circuits connects N phase, the other end connects A phase respectively, B phase and C phase, each single-phase sampling electronic circuit comprises divider resistance R4, sampling resistor R5, first electric capacity C1 and the second electric capacity C2, described divider resistance R4 and sampling resistor R5 connects, after the first described electric capacity C1 and the second electric capacity C2 parallel connection, one end connects the common point of divider resistance R4 and sampling resistor R5, one end leads to computation chip 3 as voltage sample lead-out terminal.
The particular circuit configurations of current sampling circuit as shown in Figure 3, comprise the first Current Transmit 1, second Current Transmit 2, 3rd Current Transmit 3, first resistance R1, second resistance R2 and the 3rd resistance R3, one of them terminal of the Secondary Winding of three current transformers is interconnected, another terminal leads to computation chip 3 as current sample lead-out terminal, the first described resistance R1, second resistance R2 and the 3rd resistance R3 is connected to the first Current Transmit 1, second Current Transmit 2, between two terminals of the 3rd Current Transmit 3 Secondary Winding.
The particular circuit configurations of power circuit as shown in Figure 4, comprises adjustable resistance R6, transformer TC, full bridge inverter VD, the 3rd electric capacity C3, the 4th electric capacity C4, the 5th electric capacity C5, the 6th electric capacity C6, the 7th electric capacity C7, three-terminal voltage-stabilizing chip IC, the first diode D1, the second diode D2 and direct supply S.Transformer TC input end connects external communication source, adjustable resistance R6 is connected between two input terminals of transformer TC input end, the output terminal of transformer TC connects the input end of full bridge inverter VD, a lead-out terminal of full bridge inverter VD output terminal connects the input terminal of three-terminal voltage-stabilizing chip IC, another lead-out terminal ground connection of full bridge inverter VD output terminal, after 3rd electric capacity C3 and the 4th electric capacity C4 parallel connection, its one end connects the input terminal of three-terminal voltage-stabilizing chip IC, other end ground connection, the lead-out terminal of described three-terminal voltage-stabilizing chip IC connects the 5th electric capacity C5, one end of 6th electric capacity C6 and the anode of the first diode D1, the other end ground connection of the 5th electric capacity C5 and the 6th electric capacity C6, the negative electrode of the first diode D1 connects one end of the 7th electric capacity C7 and the negative electrode of the second diode D2, the other end ground connection of the 7th electric capacity C7, the minus earth of described direct supply S, positive pole connects the anode of the second diode D2, the lead-out terminal of described three-terminal voltage-stabilizing chip IC is exported 01 by the first via of drawing as power circuit 6, the negative electrode of the first diode D1 is exported 02 by second tunnel of drawing as power circuit 6.Wherein, the 3rd electric capacity C3, the 5th electric capacity C5 and the 7th electric capacity C7 are electrochemical capacitor, and one end of its ground connection is negative pole.
The present invention is by voltage sampling circuit and current sampling circuit, respectively electric current and voltage sample are carried out to the A phase of mains supply side, B phase and C phase circuit, then added up by computation chip, very high measuring accuracy can be reached, for the analysis of follow-up line loss exception provides good data qualification, in addition adopt rational power circuit to design, improve the operation stability of metering outfit.

Claims (4)

1. an electric energy data checks the metering outfit of instrument, it is characterized in that, comprise voltage sampling circuit, current sampling circuit, computation chip, main control chip, storer and power circuit, described computation chip connects voltage sampling circuit and current sampling circuit respectively, and described main control chip connects computation chip, storer respectively;
Described voltage sampling circuit comprises three identical single-phase sampling electronic circuits of circuit structure, one end of three single-phase sampling electronic circuits connects N phase, the other end connects A phase, B phase and C phase respectively, each single-phase sampling electronic circuit comprises divider resistance, sampling resistor, the first electric capacity and the second electric capacity, described divider resistance and sampling resistor series connection, after the first described electric capacity and the second Capacitance parallel connection, one end connects the common point of divider resistance and sampling resistor, and one end leads to computation chip as voltage sample lead-out terminal; Described current sampling circuit comprises the first current transformer, the second current transformer, the 3rd current transformer, the first resistance, the second resistance and the 3rd resistance, one of them terminal of the Secondary Winding of three current transformers is interconnected, another terminal leads to computation chip as current sample lead-out terminal, and the first described resistance, the second resistance and the 3rd resistance are connected between two terminals of the first current transformer, the second current transformer, the 3rd secondary winding in current transformer.
2. a kind of electric energy data according to claim 1 checks the metering outfit of instrument, it is characterized in that, described storer is EEPROM.
3. a kind of electric energy data according to claim 1 checks the metering outfit of instrument, it is characterized in that, described power circuit comprises adjustable resistance, transformer, full bridge inverter, 3rd electric capacity, 4th electric capacity, 5th electric capacity, 6th electric capacity, 7th electric capacity, three-terminal voltage-stabilizing chip, first diode, second diode and a direct supply, transformer inputs connects external communication source, adjustable resistance is connected between two input terminals of transformer inputs, the output terminal of transformer connects the input end of full bridge inverter, a lead-out terminal of full bridge inverter output terminal connects the input terminal of three-terminal voltage-stabilizing chip, another lead-out terminal ground connection of full bridge inverter output terminal, after 3rd electric capacity and the 4th Capacitance parallel connection, its one end connects the input terminal of three-terminal voltage-stabilizing chip, other end ground connection, the lead-out terminal of described three-terminal voltage-stabilizing chip connects the 5th electric capacity, one end of 6th electric capacity and the anode of the first diode, the other end ground connection of the 5th electric capacity and the 6th electric capacity, the negative electrode of the first diode connects one end of the 7th electric capacity and the negative electrode of the second diode, the other end ground connection of the 7th electric capacity, the minus earth of described direct supply, positive pole connects the anode of the second diode, the lead-out terminal of described three-terminal voltage-stabilizing chip is exported by the first via of drawing as power circuit, the negative electrode of the first diode is exported by second tunnel of drawing as power circuit.
4. a kind of electric energy data according to claim 3 checks the metering outfit of instrument, it is characterized in that, the 3rd described electric capacity, the 5th electric capacity and the 7th electric capacity are electrochemical capacitor, and one end of its ground connection is negative pole.
CN201310090396.9A 2013-03-20 2013-03-20 A kind of electric energy data checks the metering outfit of instrument Active CN103217574B (en)

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CN111650435B (en) * 2020-08-04 2020-12-29 南京衡瑞电子科技有限公司 Electric energy metering chip system

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CN202372570U (en) * 2011-12-07 2012-08-08 江苏盛德电子仪表有限公司 Three-phase four-wire multifunctional electric energy meter
CN203224565U (en) * 2013-03-20 2013-10-02 国家电网公司 A metering apparatus of an electric energy data verifying tool

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CN201352233Y (en) * 2009-05-18 2009-11-25 深圳市森晖电子有限公司 Three-phase multifunctional electric energy meter with power carrier communication
CN201514443U (en) * 2009-09-17 2010-06-23 青岛盘古电气有限公司 Novel multifunctional energy meter
CN201662593U (en) * 2009-10-15 2010-12-01 黑龙江龙电电气有限公司 Three-phase electronic GPRS multi-functional electric energy meter
CN102062814A (en) * 2009-11-16 2011-05-18 上海安科瑞电气股份有限公司 ZIGBEE technology-based three-phase guide rail-type installed electric energy meter
CN202305664U (en) * 2011-10-28 2012-07-04 国网电力科学研究院 Electric energy meter circuit
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