CN204613349U - There is the Little Current Ground Connection System of malfunction branch location function - Google Patents
There is the Little Current Ground Connection System of malfunction branch location function Download PDFInfo
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- CN204613349U CN204613349U CN201520295665.XU CN201520295665U CN204613349U CN 204613349 U CN204613349 U CN 204613349U CN 201520295665 U CN201520295665 U CN 201520295665U CN 204613349 U CN204613349 U CN 204613349U
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Abstract
A kind of Little Current Ground Connection System with malfunction branch location function, it comprises route selection main frame, several main line data acquisition units, several secondary line data acquisition units, route selection main frame is connected by RS-485 connection with described main line data acquisition unit, and described route selection main frame is also provided with branch's wireless communicator, described secondary line data acquisition unit comprises a radio communication transmitter be communicated with described branch's wireless communicator.The utility model provides the Little Current Ground Connection System with malfunction branch location function that a kind of structure is simple, can find out faulty line rapidly, exactly, cannot realize the pinpoint defect of fault to solve existing Little Current Ground Connection System.
Description
Technical field
The utility model belongs to small current line selection locating device, is specifically related to a kind of Little Current Ground Connection System with malfunction branch location function.
Background technology
In electric system, isolated neutral, neutral by arc extinction coil grounding and neutral point are called " small current neutral grounding system " through high resistance grounding.Isolated neutral system single-phase earth fault line selection is the still unsolved a great problem paid close attention to both at home and abroad for a long time.Propose multiple selection method for this problem, but be all difficult to adapt to various electric network composition and complicated fault state completely.More than totally eight hundred, Hubei grid 35kV transformer station, wherein Small Electric Current Earthing And Routing Device has been installed by many transformer stations, have employed and form a complete data acquisition by a main frame and the data collection processor adapted with outlet data number and zero sequence current mutual inductor, process, analytic system, as shown in Figure 1, main frame is arranged in master-control room by mat, and data collection processor and zero sequence current mutual inductor are arranged in high-voltage board, on the signal connection data Acquisition Processor of zero sequence current mutual inductor, and data are sent to route selection main line analyzing and processing by RS-485 connection by useful information by data collection processor after certain pre-service, show on main frame screen after determining faulty line, also by communication modes route selection result is sent to simultaneously and combines from backstage and be sent to dispatching center by electric power special line, as shown in Figure 1.
Although, above-mentioned structure can adapt to complicated electric network composition and the method for operation preferably, on the impact of route selection effect, there is adaptability widely, the effect of centering point isolated neutral system faulty line selection rate of accuracy reached to more than 98% can be realized, but because electrical network is laid complicated, only at transformer station's installing Small Electric Current Earthing And Routing Device, user can only know that line failure of transformer station according to line selection apparatus, and can not break down by Obtaining Accurate that branched line concrete, namely can not break down a little by Obtaining Accurate, this just causes current wire selection system result of use undesirable.Therefore, the accurate location how being grounded fault is then user's problem more in the urgent need to address.
Utility model content
For solving the problems of the technologies described above, the purpose of this utility model is to provide the Little Current Ground Connection System with malfunction branch location function that a kind of structure is simple, can find out faulty line rapidly, exactly, cannot realize to solve existing Little Current Ground Connection System the defect that fault accurately locates.
For achieving the above object, a kind of Little Current Ground Connection System with malfunction branch location function of the utility model, it comprises route selection main frame, several main line data acquisition units, several secondary line data acquisition units, it is characterized in that, described route selection main frame is connected by RS-485 connection with described main line data acquisition unit, and described route selection main frame is also provided with branch's wireless communicator, described secondary line data acquisition unit comprises a radio communication transmitter be communicated with described branch's wireless communicator.
On the basis of such scheme preferably, described main line data acquisition unit comprise main line data processor and have obtain current signal on circuit zero sequence current mutual inductor, described zero sequence current mutual inductor is connected with described route selection main frame by described main line data processor.
On the basis of such scheme preferably, described secondary line data acquisition unit comprises and being installed on branched line for obtaining auxiliary zero sequence current mutual inductor and the branch data processor of the current signal on branched line, described branch data processor and described auxiliary zero sequence current mutual inductor are electrical connected, data message for being obtained by described auxiliary zero sequence current mutual inductor carries out preliminary pre-service, and the output terminal of described branch data processor and described radio communication transmitter are electrical connected, so that pretreated data are sent to described route selection main frame by described radio communication transmitter.
On the basis of such scheme preferably, described route selection main frame comprises MCU processor, the LCD display be connected with described MCU processor output terminal and the communication interface be communicated with RS-485 connection, described communication interface is connected with described MCU processor, and described branch's wireless communicator and described MCU processor are interconnected.
On the basis of such scheme preferably, the input end of described MCU processor is also connected to a change-over circuit.
On the basis of such scheme preferably, described route selection main frame also comprises the keyboard be connected with described MCU processor and a storer.
The utility model compared with prior art, its beneficial effect is: a kind of Little Current Ground Connection System with malfunction branch location function of the present utility model, it is by arranging branch's wireless communicator on route selection main frame, and coordinate secondary line data acquisition unit, current information branched line obtaining branched line is installed in by this track data collector, and the information of acquisition is sent to route selection main frame by radio communication transmitter, accurately can know that current that branched line concrete breaks down, thus the accurate location realized branched line fault, line fault is investigated more simple and convenient, time saving and energy saving.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing Little Current Ground Connection System;
Fig. 2 is the structured flowchart with the Little Current Ground Connection System of malfunction branch location function of the present utility model;
Fig. 3 is the detailed block diagram with the Little Current Ground Connection System of malfunction branch location function of the present utility model;
Fig. 4 is the structured flowchart of the second embodiment of the present utility model;
Fig. 5 is the structured flowchart of route selection main frame of the present utility model.
Embodiment
By describe in detail the utility model technology contents, structural attitude, reached object and effect, hereby exemplify embodiment below and coordinate accompanying drawing to be explained in detail.
Refer to shown in Fig. 2, and shown in composition graphs 3 to Fig. 5, the utility model provides a kind of Little Current Ground Connection System with malfunction branch location function, it comprises route selection main frame, several main line data acquisition units, several secondary line data acquisition units, route selection main frame is connected by RS-485 connection with main line data acquisition unit, and route selection main frame is also provided with branch's wireless communicator, secondary line data acquisition unit comprises a radio communication transmitter be communicated with branch wireless communicator, wherein, main line data acquisition unit comprise main line data processor and have obtain current signal on circuit zero sequence current mutual inductor, and zero sequence current mutual inductor is connected with route selection main frame by main line data processor.Secondary line data acquisition unit comprises and being installed on branched line for obtaining auxiliary zero sequence current mutual inductor and the branch data processor of the current signal on branched line, branch data processor and auxiliary zero sequence current mutual inductor are electrical connected, data message for being obtained by auxiliary zero sequence current mutual inductor carries out preliminary pre-service, and the output terminal of branch data processor and radio communication transmitter are electrical connected, so that pretreated data are sent to described route selection main frame by described radio communication transmitter.
During use, main line data acquisition unit is installed on transformer station's high-voltage board, and zero sequence current mutual inductor is installed in the outlet of transformer station, to obtain the zero-sequence current value in outlet, and by the zero-sequence current value of acquisition through the pre-service of main line data acquisition unit, pretreated information is sent to main frame by RS-485; Simultaneously, secondary line data acquisition unit is installed in respectively on the branched line of each transformer station output, and the auxiliary zero sequence current mutual inductor of this track data collector is installed on branched line, to obtain the zero-sequence current value in branch wire, and the branched line zero-sequence current value of acquisition is carried out, after preliminary pre-service, being sent to route selection main frame by radio communication transmitter through branch data processor.In use procedure, once line failure, route selection main frame just accurately can know that line failure concrete according to the zero-sequence current value that different circuit sends, thus avoid traditional Little Current Ground Connection System and can only obtain general trouble spot, and can not know that branched line concrete breaks down, institute's causing trouble gets rid of the large problem of workload.
Certainly, secondary line data acquisition unit of the present utility model can arrange secondary branch or three grades of branches according to actual conditions, as shown in Figure 4, for the structured flowchart of secondary branch data collector of the present utility model, route selection main frame coordinates by branch's wireless communicator and secondary data collector, accurately knows that transformer station subordinate secondary branched line produces position of failure point.
In order to further describe technical solutions of the utility model, shown in Fig. 5, route selection main frame of the present utility model comprises MCU processor, the LCD display be connected with MCU processor output terminal, and the communication interface to be communicated with RS-485 connection, communication interface is connected with MCU processor, for obtaining the zero sequence current signal of the circuit outlet of main line data acquisition unit, and this branch's wireless communicator and MCU processor are interconnected, to obtain the zero sequence current signal of secondary line, thus judge which branch road concrete breaks down by MCU processor, and the information of judgement is sent to LCD display identifies for user.
Further, the utility model is also connected to a change-over circuit at the input end of MCU processor.
Preferably, route selection main frame of the present utility model also comprises a printer be connected with MCU processor, keyboard and storer.
In sum, be only the preferred embodiment of the utility model, do not limit protection domain of the present utility model with this, all equivalence changes done according to the utility model the scope of the claims and description with modify, be all within scope that the utility model patent contains.
Claims (6)
1. there is the Little Current Ground Connection System of malfunction branch location function, it comprises route selection main frame, several main line data acquisition units, several secondary line data acquisition units, it is characterized in that, described route selection main frame is connected by RS-485 connection with described main line data acquisition unit, and described route selection main frame is also provided with branch's wireless communicator, described secondary line data acquisition unit comprises a radio communication transmitter be communicated with described branch's wireless communicator.
2. there is the Little Current Ground Connection System of malfunction branch location function as claimed in claim 1, it is characterized in that: described main line data acquisition unit comprise main line data processor and have obtain current signal on circuit zero sequence current mutual inductor, described zero sequence current mutual inductor is connected with described route selection main frame by described main line data processor.
3. there is the Little Current Ground Connection System of malfunction branch location function as claimed in claim 2, it is characterized in that: described secondary line data acquisition unit comprises and being installed on branched line for obtaining auxiliary zero sequence current mutual inductor and the branch data processor of the current signal on branched line, described branch data processor and described auxiliary zero sequence current mutual inductor are electrical connected, data message for being obtained by described auxiliary zero sequence current mutual inductor carries out preliminary pre-service, and the output terminal of described branch data processor and described radio communication transmitter are electrical connected, so that pretreated data are sent to described route selection main frame by described radio communication transmitter.
4. there is the Little Current Ground Connection System of malfunction branch location function as claimed in claim 1, it is characterized in that: described route selection main frame comprises MCU processor, the LCD display be connected with described MCU processor output terminal and the communication interface be communicated with RS-485 connection, described communication interface is connected with described MCU processor, and described branch's wireless communicator and described MCU processor are interconnected.
5. there is the Little Current Ground Connection System of malfunction branch location function as claimed in claim 4, it is characterized in that: the input end of described MCU processor is also connected to a change-over circuit.
6. there is the Little Current Ground Connection System of malfunction branch location function as claimed in claim 4, it is characterized in that: described route selection main frame also comprises the keyboard be connected with described MCU processor and a storer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520295665.XU CN204613349U (en) | 2015-05-08 | 2015-05-08 | There is the Little Current Ground Connection System of malfunction branch location function |
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| CN201520295665.XU CN204613349U (en) | 2015-05-08 | 2015-05-08 | There is the Little Current Ground Connection System of malfunction branch location function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239529A (en) * | 2018-09-30 | 2019-01-18 | 北京霍远科技有限公司 | The prevention of power circuit hidden danger and information warning system and method |
| CN113805095A (en) * | 2021-08-24 | 2021-12-17 | 安徽广聚电力自动化技术有限公司 | Ultrahigh frequency intelligent inspection system |
| CN114062963A (en) * | 2021-10-19 | 2022-02-18 | 广西电网有限责任公司防城港供电局 | Direct current system insulation monitoring device capable of finding specific grounding point |
-
2015
- 2015-05-08 CN CN201520295665.XU patent/CN204613349U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239529A (en) * | 2018-09-30 | 2019-01-18 | 北京霍远科技有限公司 | The prevention of power circuit hidden danger and information warning system and method |
| CN113805095A (en) * | 2021-08-24 | 2021-12-17 | 安徽广聚电力自动化技术有限公司 | Ultrahigh frequency intelligent inspection system |
| CN114062963A (en) * | 2021-10-19 | 2022-02-18 | 广西电网有限责任公司防城港供电局 | Direct current system insulation monitoring device capable of finding specific grounding point |
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