CN202033442U - Zero-sequence current on-line monitoring device for meter box - Google Patents

Zero-sequence current on-line monitoring device for meter box Download PDF

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Publication number
CN202033442U
CN202033442U CN2011200793363U CN201120079336U CN202033442U CN 202033442 U CN202033442 U CN 202033442U CN 2011200793363 U CN2011200793363 U CN 2011200793363U CN 201120079336 U CN201120079336 U CN 201120079336U CN 202033442 U CN202033442 U CN 202033442U
Authority
CN
China
Prior art keywords
zero
sequence current
carrier wave
circuit
concentrator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2011200793363U
Other languages
Chinese (zh)
Inventor
吴跃斌
乐开诚
颜铮
刘志刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
State Grid Fujian Electric Power Co Ltd
Original Assignee
吴跃斌
乐开诚
颜铮
刘志刚
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 吴跃斌, 乐开诚, 颜铮, 刘志刚 filed Critical 吴跃斌
Priority to CN2011200793363U priority Critical patent/CN202033442U/en
Application granted granted Critical
Publication of CN202033442U publication Critical patent/CN202033442U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a zero-sequence current on-line monitoring device for a meter box. The zero-sequence current on-line monitoring device comprises a main singlechip connected with a memory and is characterized in that the main singlechip is connected with a zero-sequence current detection module, the output serial port of the main singlechip is connected with a carrier wave communication module, a power line carrier communication module carries out data transmission with a concentrator by a power line, and the concentrator transmits reading data to a remote master station through a wired or wireless network. In the utility model, the zero-sequence current detection module is arranged in a low-voltage resident electricity meter box to acquire the current output by a zero-sequence current mutual inductor. When the zero-sequence current reaches an electricity leakage range, an electricity leakage alarm is given out; and when the zero-sequence current reaches an electricity stealing range, an electricity stealing alarm is given out. An alarm signal is actively transmitted to the concentrator through low-voltage power line carrier and is uploaded to a system master station through the concentrator so as to realize on-line real-time monitoring of the electricity leakage and stealing of the box and improve the safe electricity usage level.

Description

Table case zero-sequence current on-Line Monitor Device
Technical field
The utility model relates to a kind of table case zero-sequence current on-Line Monitor Device.
Background technology
Electricity is people's requisite energy of living, and stealing is a kind of illegal activities, can cause huge injury to himself and the safety of society simultaneously.Electric power enterprise is through survey, most electricity filching behaviors be by: private start to exchange fire line, put upside down house lead in fire-zero line and use fire-omnifarious methods such as ground wire electricity consumption, these methods all can cause table case point of incoming cables zero-sequence current imbalance; In addition, because equipment and electric wire is aging, reaches the consumer electronics fault and cause electric leakage phenomenons such as (being the zero-sequence current imbalance), resident living and device security in serious threat, in time finding this type of incident, accomplish to leak electricity, the on-line monitoring of stealing, is problem demanding prompt solution.
Summary of the invention
The purpose of this utility model provides a kind of table case zero-sequence current on-Line Monitor Device, realizes the on-line real time monitoring of the electric leakage of table case, stealing, the purpose of raising safety utilization of electric power level.
Table case zero-sequence current on-Line Monitor Device of the present utility model comprises the host scm that is connected with storer, it is characterized in that: described host scm is connected with a zero-sequence current detection module; The output serial ports of described host scm is connected with a carrier communication module, and described Power Line Carrier Communication Module is carried out data transmission through a line of electric force and a concentrator, and described concentrator is sent to distant place main website by wired or wireless network with meter reading data.
In the utility model one embodiment, described zero-sequence current detection module comprises the zero sequence current mutual inductor that is used for detection table case zero-sequence current.
In the utility model one embodiment, described carrier communication module comprises: a carrier wave coupled circuit is connected with low-voltage power line; One carrier wave transtation mission circuit is connected with the input end of described carrier wave coupled circuit; One carrier wave receiving circuit is connected with the output terminal of described carrier wave coupled circuit; One live road ripple signal synchronization circuit electrically connects with described carrier wave transtation mission circuit, carrier wave receiving circuit and carrier wave coupled circuit; And a communication port that is connected with the host scm serial ports, described communication port is connected with the carrier wave receiving circuit with described carrier wave transtation mission circuit.
The utility model is gathered the electric current of zero sequence current mutual inductor output by at low pressure resident ammeter box the zero-sequence current detection module being installed.When zero-sequence current reaches the electric leakage scope, send leakage-current alarm; When zero-sequence current reaches the stealing scope, send stealing and report to the police.Alerting signal initiatively is sent to concentrator by low-voltage power carrier, and by arriving the main website of system on the concentrator.Realize the on-line real time monitoring of the electric leakage of table case, stealing, the purpose of raising safety utilization of electric power level.The utility model is simple in structure, has good practical values.
Description of drawings
Fig. 1 is an architecture principle block diagram of the present utility model.
Fig. 2 is the circuit theory synoptic diagram of the carrier communication module of the utility model embodiment.
Fig. 3 is the zero-sequence current detection module of the utility model embodiment and the interface circuit synoptic diagram of host scm.
Fig. 4 is the carrier wave transtation mission circuit synoptic diagram of the utility model embodiment.
Fig. 5 is the carrier wave receiving circuit synoptic diagram of the utility model embodiment.
Fig. 6 is the carrier wave coupled circuit synoptic diagram of the utility model embodiment.
Fig. 7 is the carrier signal synchronizing circuit synoptic diagram of the utility model embodiment.
Fig. 8 is the system program schematic flow sheet of the host scm of the utility model embodiment.
Fig. 9 is the program circuit synoptic diagram of the 78F9234 single-chip microcomputer of the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples the utility model is described further.
As shown in Figure 1, the utility model provides table case zero-sequence current on-Line Monitor Device, comprises the host scm that is connected with storer, and it is characterized in that: described host scm is connected with a zero-sequence current detection module; The output serial ports of described host scm is connected with a carrier communication module, and described Power Line Carrier Communication Module is carried out data transmission through a line of electric force and a concentrator, and described concentrator is sent to distant place main website by wired or wireless network with meter reading data.
Please refer to Fig. 2, the carrier communication module described in the present embodiment comprises: a carrier wave coupled circuit is connected with low-voltage power line;
One carrier wave transtation mission circuit is connected with the input end of described carrier wave coupled circuit; One carrier wave receiving circuit is connected with the output terminal of described carrier wave coupled circuit; One live road ripple signal synchronization circuit electrically connects with described carrier wave transtation mission circuit, carrier wave receiving circuit and carrier wave coupled circuit; And a communication port that is connected with microcontroller serial port, described communication port is connected with the carrier wave receiving circuit with described carrier wave transtation mission circuit.
In order to allow those skilled in the art better understand the utility model, below our bound fraction circuit module carry out simple declaration, please refer to Fig. 3, Fig. 3 is the interface circuit synoptic diagram of the utility model zero-sequence current detection module and host scm, connector P1 external impressed current mutual inductor among the figure (this mutual inductor is used for the sampling of line of electric force zero-sequence current), be input as the 50HZ ac current signal, be converted to ac voltage signal through sampling resistor R2, through forming the smooth dc voltage signal behind VD1, the C1 rectifying and wave-filtering, insert the A/D sample port ANI0 of single-chip microcomputer 78F0526 again.Single-chip microcomputer compares with the threshold values that sets in advance the result of this sampling, thereby realizes the sampling to zero-sequence current, and as the foundation of judging electric leakage and stealing.Send the frame of registering by serial port UART6 to single-chip microcomputer 78F9234 then, send carrier signal via 78F9234 to power circuit again.
Carrier transmitting-receiving circuit of the present utility model by single-chip microcomputer 78F9234 with and peripheral circuit realize.Single-chip microcomputer 78F0526 sends the warning frame by serial port UART6 to single-chip microcomputer 78F9234 after detecting electric leakage or stealing signal by A/D sample port ANI0, sends carrier signal via 78F9234 to power circuit then.Please refer to Fig. 4, Fig. 4 is a carrier wave transtation mission circuit synoptic diagram, among the figure, constitutes a power amplification circuit by Q3, Q4, Q6, Q7, and its effect is that the square-wave signal FSK_OUT that single-chip microcomputer 78F9234 sends is amplified.C17 and L1 constitute a bandpass filter, and signal is carried out shaping and filtering.Signal finally outputs to the line of electric force coupled circuit.D2, D3 are holding circuit, prevent that overvoltage from causing damage to circuit.
Please refer to Fig. 5, Fig. 5 is a carrier wave receiving circuit synoptic diagram; Among the figure, CF1 and U4(MC3361) constitute a bandwidth-limited circuit, the undesired signal that coupling is come on the filtering line of electric force.Q5, Q6 constitute signal amplification circuit filtered signal are amplified, carry out integration via C18 again after, the A/D sample port that outputs to single-chip microcomputer 78F9234 is carried out data parsing.
Please refer to Fig. 6, Fig. 6 is a carrier wave coupled circuit synoptic diagram, and T2 is a pickup coil (turn ratio is 10:40) among the figure, constitutes coupled circuit with high-voltage capacitance CO2.TVS2 restricting signal voltage prevents from that the instantaneous high pressure signal is coupled on the line of electric force circuit is caused damage.
Please refer to Fig. 7, Fig. 7 is a carrier signal synchronizing circuit synoptic diagram, the utility model utilize AC power Vsys near zero-crossing point O1, O2 by the judgement that realizes the line of electric force zero crossing, and as the synchronous foundation of carrier signal.
Fig. 8 is the system program schematic flow sheet of the host scm of the utility model embodiment.Fig. 9 is the program circuit synoptic diagram of the 78F9234 single-chip microcomputer of the utility model embodiment.
The above only is preferred embodiment of the present utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.

Claims (3)

1. a table case zero-sequence current on-Line Monitor Device comprises the host scm that is connected with storer, and it is characterized in that: described host scm is connected with a zero-sequence current detection module; The output serial ports of described host scm is connected with a carrier communication module, described Power Line Carrier Communication Module is connected with a concentrator through line of electric force carries out data transmission, and described concentrator is sent to distant place main website by wired or wireless network with meter reading data.
2. table case zero-sequence current on-Line Monitor Device according to claim 1, it is characterized in that: described zero-sequence current detection module comprises the zero sequence current mutual inductor that is used for detection table case zero-sequence current.
3. table case zero-sequence current on-Line Monitor Device according to claim 1 is characterized in that described carrier communication module comprises:
One carrier wave coupled circuit is connected with low-voltage power line;
One carrier wave transtation mission circuit is connected with the input end of described carrier wave coupled circuit;
One carrier wave receiving circuit is connected with the output terminal of described carrier wave coupled circuit;
One live road ripple signal synchronization circuit electrically connects with described carrier wave transtation mission circuit, carrier wave receiving circuit and carrier wave coupled circuit; And a communication port that is connected with the host scm serial ports, described communication port is connected with the carrier wave receiving circuit with described carrier wave transtation mission circuit.
CN2011200793363U 2011-03-24 2011-03-24 Zero-sequence current on-line monitoring device for meter box Expired - Fee Related CN202033442U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011200793363U CN202033442U (en) 2011-03-24 2011-03-24 Zero-sequence current on-line monitoring device for meter box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011200793363U CN202033442U (en) 2011-03-24 2011-03-24 Zero-sequence current on-line monitoring device for meter box

Publications (1)

Publication Number Publication Date
CN202033442U true CN202033442U (en) 2011-11-09

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Application Number Title Priority Date Filing Date
CN2011200793363U Expired - Fee Related CN202033442U (en) 2011-03-24 2011-03-24 Zero-sequence current on-line monitoring device for meter box

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104833893A (en) * 2015-04-14 2015-08-12 国网浙江杭州市萧山区供电公司 Electric leakage detecting terminal, system, and method
CN105510796A (en) * 2014-12-29 2016-04-20 李银龙 Automatic tester applied to smart electric meter production line
CN106405181A (en) * 2016-10-31 2017-02-15 国网山东省电力公司济南供电公司 Electric energy meter with anti-electricity stealing monitoring function

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105510796A (en) * 2014-12-29 2016-04-20 李银龙 Automatic tester applied to smart electric meter production line
CN104833893A (en) * 2015-04-14 2015-08-12 国网浙江杭州市萧山区供电公司 Electric leakage detecting terminal, system, and method
CN106405181A (en) * 2016-10-31 2017-02-15 国网山东省电力公司济南供电公司 Electric energy meter with anti-electricity stealing monitoring function
CN106405181B (en) * 2016-10-31 2018-08-07 国网山东省电力公司济南供电公司 A kind of electric energy meter with anti-electricity-theft monitoring function

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: STATE ELECTRIC NET CROP.

Free format text: FORMER OWNER: WU YUEBIN

Effective date: 20131204

Owner name: STATE GRID FUJIAN ELECTRIC POWER CO., LTD. WU YUEB

Free format text: FORMER OWNER: LE KAICHENG YAN ZHENG LIU ZHIGANG

Effective date: 20131204

COR Change of bibliographic data

Free format text: CORRECT: ADDRESS; FROM: 350003 FUZHOU, FUJIAN PROVINCE TO: 100031 XICHENG, BEIJING

C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20131204

Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing

Patentee after: State Grid Corporation of China

Patentee after: State Grid Fujian Electric Power Co., Ltd.

Patentee after: Wu Yuebin

Patentee after: Le Kaicheng

Patentee after: Yan Zheng

Patentee after: Liu Zhigang

Address before: 350003 No. 45, Qian Tang lane, Gulou District, Fujian, Fuzhou 202

Patentee before: Wu Yuebin

Patentee before: Le Kaicheng

Patentee before: Yan Zheng

Patentee before: Liu Zhigang

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: 20111109

Termination date: 20180324