CN102122140A - Demarcation switch system - Google Patents
Demarcation switch system Download PDFInfo
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- CN102122140A CN102122140A CN2010106037158A CN201010603715A CN102122140A CN 102122140 A CN102122140 A CN 102122140A CN 2010106037158 A CN2010106037158 A CN 2010106037158A CN 201010603715 A CN201010603715 A CN 201010603715A CN 102122140 A CN102122140 A CN 102122140A
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Abstract
The invention relates to a demarcation switch system belonging to the technical field of high-voltage switch protection and comprising a switch body, a controller and a background management machine. The switch body comprises a three-phase voltage transformer, a three-phase current transformer, a zero-sequence current transformer and an operation loop, wherein the controller comprises a transmitter, an A/D (Analog/Digital) conversion circuit, a singlechip system and a first communication module; the three-phase voltage transformer, the three-phase current transformer and the zero-sequence current transformer are respectively connected to the input end of the transmitter, the output end of the transmitter is connected to the input end of the A/D conversion circuit, the output end of the A/D conversion circuit is connected to the singlechip system which is connected to the operation loop, the first communication module is connected to the singlechip system, and the background management machine is internally provided with a second communication module matched with the first communication module. The invention can rapidly judge line failure positions and isolate failure lines, reduces a power failure range, is reliable to operate and is preferred equipment for networking automation in a smart grid.
Description
Technical field
The present invention relates to a kind of high-voltage switch gear route survey equipment, belong to high-voltage switch gear resist technology field.
Background technology
Usually rely on electric substation's feeder protection equipment in the prior art; it judges the operation conditions of circuit by technical parameters such as predefined electric current and voltages; if faults such as circuit generation overcurrent, short circuits, the rapid disengagement failure feeder of the protective device of electric substation is guaranteed the safety that system powers.Because the high pressure feeder line generally adopts overhead transmission line, one or two branch line of user's special line band that has, the circuit that has are that T connects many branch lines or many transformers are radial; The circuit that has is short to tens meters, and the circuit that has reaches tens kms; The overhead transmission line that has is crossed over mountain after mountain, and all fronts that have are built on stilts, have plenty of the cable aerial mixed line; Some overhead transmission line has cable user temporarily, has interim case change.In a single day overhead transmission line breaks down and searches difficulty, particularly when circuit generation single-phase earthing, owing to the trouble spot is difficult to determine, has often incured loss through delay accident treatment, causes fault to enlarge, and is further development of phase fault.At present a lot of electric companies still use backguy method failure judgement to go out line position.Therefore, the position that prior art can not the failure judgement circuit, isolated fault point, the power failure scope of dwindling circuit.
Summary of the invention
The objective of the invention is: provide a kind of and can judge line fault position and isolated fault circuit rapidly, dwindle the high-voltage switch gear line fault detection system of power failure scope.
The object of the present invention is achieved like this: a kind of demarcation switch system, be made up of Switch main body, controller, back-stage management machine; Described Switch main body comprises threephase potential transformer, threephase current transformer, zero sequence current mutual inductor, operation circuit; Described controller comprises transmitter, analog to digital conversion circuit, Single Chip Microcomputer (SCM) system, first communication module; Threephase potential transformer, threephase current transformer, zero sequence current mutual inductor connect the input end of transmitter respectively, the output terminal of transmitter connects the input end of analog to digital conversion circuit, the output terminal of analog to digital conversion circuit connects Single Chip Microcomputer (SCM) system, operation circuit is connected with Single Chip Microcomputer (SCM) system, and first communication module is connected with Single Chip Microcomputer (SCM) system; The second communication module that cooperates with described first communication module is set in the described back-stage management machine.
As a kind of improvement of the present invention, the output terminal of the Single Chip Microcomputer (SCM) system in the described controller connects display module.
As a kind of improvement of the present invention, described first communication module and second communication module are respectively the GPRS communication module.
As a kind of improvement of the present invention, described first communication module and second communication module are respectively the optical fiber communication module.
The present invention is made up of demarcation switch body, controller, back-stage management machine, and the demarcation switch body transfers to controller with line current, voltage and zero sequence current signal in real time.Controller is made up of transmitter, analog to digital conversion circuit, Single Chip Microcomputer (SCM) system, display module, communication module, the effect of transmitter be voltage and current value transform that the transmission line of electricity mutual inductor is sent here by the treatable voltage and current value of Single Chip Microcomputer (SCM) system, realize real-time Monitoring Line.Single Chip Microcomputer (SCM) system is a core, except finishing data sampling, range finding computing, also is responsible for data transmission.
Thereby Single Chip Microcomputer (SCM) system of the present invention is utilized false voltage and electric current to calculate the fault loop reactance value and is calibrated the trouble spot distance, when circuit is short-circuited fault, by measuring the computational scheme head end is the line reactance of demarcation switch body to the trouble spot, according to the line reactance value of the transmission line principle that is directly proportional with length, distance that can the localization of faults.
Out of order type can be judged by measured voltage, current value,, the distance of trouble spot can be accurately calculated by the reactance value that converses.For the measurement of all kinds of faults such as single-phase earthing of three-phase shortcircuit, line to line fault and isolated neutral system, its principle is the same, difference only be required measurement parameter by voltage between phases and the electric current in the formation loop.
Single Chip Microcomputer (SCM) system is analyzed computing with the operation conditions of circuit, except finishing data sampling, range finding computing, also is responsible for data transmission.Control demarcation switch automatic brake separating when circuit generation singlephase earth fault; Control demarcation switch automatic trip when circuit is short-circuited fault, and control demarcation switch according to the line fault situation and carry out reclosing or automatic blocking faulty line; Accurately measure the trouble spot simultaneously, real-time and back-stage management machine data conversion.
The back-stage management machine is responsible for the centralized management of data, carry out the parameter setting of each demarcation switch according to line conditions, the operation of long-range branch, combined floodgate is carried out in the demonstration of the electronic chart of trouble spot to demarcation switch, the operation conditions of monitoring switch and circuit operation conditions, the storage of the line data of going forward side by side.
Each Switch main body and controller in the circuit can calculate the trouble spot, send to the back-stage management machine of electric substation by GPRS communication module or optical fiber communication module, simultaneously can be notify the maintainer during automatically with the correlation technique parameter of location of fault and fault with short message mode, inlet wire overhauls fast, and the abort situation that the back-stage management machine is beamed back the demarcation switch body accurately is reflected on the electronic chart.Through having carried out simulation test on the Electrical Power System Dynamic simulation test device, various measured datas show that systematic measurement error is less than 0.3%, and reliable operation.
The present invention can judge line fault position and isolated fault circuit rapidly, dwindles the power failure scope, and Switch main body and controller adopt integrated design, and is outdoor easy for installation, reliable, is the preferred unit of distribution automation in the intelligent grid.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention.
Embodiment
As shown in Figure 1, a kind of demarcation switch system is made up of Switch main body 1, controller 2, back-stage management machine 3; Switch main body 1 comprises threephase potential transformer 101, threephase current transformer 103, zero sequence current mutual inductor 102, operation circuit 104; Controller 2 comprises transmitter 201, analog to digital conversion circuit 202, Single Chip Microcomputer (SCM) system 203, first communication module 205; Threephase potential transformer 101, threephase current transformer 103, zero sequence current mutual inductor 102 connect the input end of transmitter 201 respectively, the output terminal of transmitter 201 connects the input end of analog to digital conversion circuit 202, the output terminal of analog to digital conversion circuit 202 connects Single Chip Microcomputer (SCM) system 203, operation circuit 104 is connected with Single Chip Microcomputer (SCM) system 203, and first communication module 205 is connected with Single Chip Microcomputer (SCM) system 203; The second communication module 301 that cooperates with first communication module 203 is set in the back-stage management machine 3.The output terminal of the Single Chip Microcomputer (SCM) system 203 in the controller 2 also connects a display module 204.First communication module 205 and second communication module 301 are respectively the GPRS communication module or are respectively the optical fiber communication module.
Claims (4)
1. a demarcation switch system is characterized in that: be made up of Switch main body, controller, back-stage management machine; Described Switch main body comprises threephase potential transformer, threephase current transformer, zero sequence current mutual inductor, operation circuit; Described controller comprises transmitter, analog to digital conversion circuit, Single Chip Microcomputer (SCM) system, first communication module; Threephase potential transformer, threephase current transformer, zero sequence current mutual inductor connect the input end of transmitter respectively, the output terminal of transmitter connects the input end of analog to digital conversion circuit, the output terminal of analog to digital conversion circuit connects Single Chip Microcomputer (SCM) system, operation circuit is connected with Single Chip Microcomputer (SCM) system, and first communication module is connected with Single Chip Microcomputer (SCM) system; The second communication module that cooperates with described first communication module is set in the described back-stage management machine.
2. demarcation switch according to claim 1 system is characterized in that: the output terminal of the Single Chip Microcomputer (SCM) system in the described controller connects display module.
3. demarcation switch according to claim 1 and 2 system, it is characterized in that: described first communication module and second communication module are respectively the GPRS communication module.
4. demarcation switch according to claim 1 and 2 system, it is characterized in that: described first communication module and second communication module are respectively the optical fiber communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106037158A CN102122140A (en) | 2010-12-24 | 2010-12-24 | Demarcation switch system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106037158A CN102122140A (en) | 2010-12-24 | 2010-12-24 | Demarcation switch system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102122140A true CN102122140A (en) | 2011-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106037158A Pending CN102122140A (en) | 2010-12-24 | 2010-12-24 | Demarcation switch system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683232A (en) * | 2013-12-26 | 2014-03-26 | 杭州国电电气设备有限公司 | GPRS (General Packet Radio Service) monitoring method, device and system for demarcation load switch |
| CN104410156A (en) * | 2014-11-12 | 2015-03-11 | 江苏东源电器集团股份有限公司 | Intelligent outdoor separator |
| CN109212375A (en) * | 2018-09-27 | 2019-01-15 | 能电气有限公司 | Detector is defined in a kind of low-voltage electric energy metering case line fault wisdom electricity consumption |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345156A (en) * | 2007-05-24 | 2009-01-14 | 郑文秀 | Demarcation switch |
| CN201466799U (en) * | 2009-08-25 | 2010-05-12 | 姬云东 | Monitoring system for safe production signals |
-
2010
- 2010-12-24 CN CN2010106037158A patent/CN102122140A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345156A (en) * | 2007-05-24 | 2009-01-14 | 郑文秀 | Demarcation switch |
| CN201466799U (en) * | 2009-08-25 | 2010-05-12 | 姬云东 | Monitoring system for safe production signals |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683232A (en) * | 2013-12-26 | 2014-03-26 | 杭州国电电气设备有限公司 | GPRS (General Packet Radio Service) monitoring method, device and system for demarcation load switch |
| CN103683232B (en) * | 2013-12-26 | 2017-02-22 | 杭州国电电气设备有限公司 | GPRS (General Packet Radio Service) monitoring method, device and system for demarcation load switch |
| CN104410156A (en) * | 2014-11-12 | 2015-03-11 | 江苏东源电器集团股份有限公司 | Intelligent outdoor separator |
| CN109212375A (en) * | 2018-09-27 | 2019-01-15 | 能电气有限公司 | Detector is defined in a kind of low-voltage electric energy metering case line fault wisdom electricity consumption |
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Application publication date: 20110713 |