CN100499308C - Method for selective leakage protection of electric feeding switch protector - Google Patents
Method for selective leakage protection of electric feeding switch protector Download PDFInfo
- Publication number
- CN100499308C CN100499308C CNB2006100410815A CN200610041081A CN100499308C CN 100499308 C CN100499308 C CN 100499308C CN B2006100410815 A CNB2006100410815 A CN B2006100410815A CN 200610041081 A CN200610041081 A CN 200610041081A CN 100499308 C CN100499308 C CN 100499308C
- Authority
- CN
- China
- Prior art keywords
- protective device
- feeding switch
- switch protective
- branch
- leak current
- 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
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
This invention relates to a selective leakage protection method for feed switch protection devices characterizing in utilizing CAN bus to communicate and endue the CAN bus ID of different priorities based on the level of the feed switch protection device places including setting the ID priority of the main feed switch protection device the lowest and the ID priorities of the branch devices higher in file, when leakage happens to the load side of any branch device, the branch and the main feed protection devices test it at the same time, the branch wins the bus arbitration in terms of its ID and transmits the information, the main and the branch feed switch protection devices without errors keep normal.
Description
Technical field:
The present invention relates to a kind of method that is applied in selective earth leakage protection in the 380～1140V electrical network of colliery.
Background technology:
Coal production is mainly carried out in the down-hole, and major part is a cable power supply, and environment is abominable, and fault is many, and single-phase electric leakage or single phase ground fault often take place cable line.Perfect selective earth leakage protection is set, takes practicable earth leakage protective measure, can dwindle the power failure scope, improve the fail safe and the reliability of coal production greatly.Low-voltage power supply system under the coal mine as shown in drawings.Wherein, the M1 place is total feeding switch, and S2, S3 and S4 place are branch's feeding switch, and T is a step-down transformer.
In system shown in the accompanying drawing, the earth leakage protective device branch is located at total feeding switch and branch's feeding switch two places, that is adopts two-stage selective earth leakage protection system.For guaranteeing its selectivity, existingly between the two-stage earth leakage protective device, generally can only realize the selectivity of moving by time-delay, should promptly follow differential principle of time limit the operate time of higher level's earth leakage protective device than long stage in time limit of next stage; Laterally selectivity then adopts zero-sequence current directional power protection principle to realize, the earth leakage protective device at total feeding switch protective device place adopts the protection philosophy of additional dc power supply.Differential 200～the 500ms that is about of operation time limit between the upper and lower two-stage selective leakage protection device.
Selective earth leakage protection malfunction in the use of China's underground low-tension network at present, tripping phenomenon happen occasionally, and have a strong impact on the safety in production of coal.Have time-delay because higher level's selective leakage protection device moves simultaneously, make the operate time long (when leaking electricity as circuit 1) near the selective leakage protection device of power supply, the danger that the person gets an electric shock in this protection range is just bigger.Thereby the selectivity of earth leakage protective device action and the contradiction between the personal fail safe of getting an electric shock have occurred, sacrificed certain fail safe in other words and just brought selectivity.
Summary of the invention:
The present invention is for avoiding above-mentioned existing in prior technology weak point, providing a kind of CAN bus of utilizing quick, stepless difference to realize the method for selective leakage protection of electric feeding switch protector.
The technical scheme that technical solution problem of the present invention is adopted is:
The characteristics of the method for selective leakage protection of electric feeding switch protector of the present invention are to utilize the CAN bus to carry out communication; give the identifier of the different priority of CAN bus according to the residing level of feeding switch protective device; comprise: the identifier priority that total feeding switch protective device is set is minimum; the identifier priority of first branch's feeding switch protective device is higher than the identifier priority that second branch's feeding switch protective device identifier priority, second branch's feeding switch protective device identifier priority are higher than the 3rd branch's feeding switch protective device, then has:
A, the 3rd feeding switch protective device S4 of branch load-side generation leak current fault, the 3rd feeding switch protective device S4 of branch and total feeding switch protective device M1 detect this fault simultaneously, the 3rd feeding switch protective device S4 of branch protects separating brake immediately, and faulty line is cut off; The 3rd feeding switch protective device S4 of branch and total feeding switch protective device M1 all attempt sending leak current fault information to the CAN bus, after the 3rd higher feeding switch protective device S4 of branch of identifier priority wins bus arbitration leak current fault information is sent, total feeding switch protective device M1 detects the leak current fault eliminating and recovers normal condition and cancel the trial that sends leak current fault information behind this branch's feeding switch protective device separating brake, write down the leak current fault information of described from the beginning the 3rd feeding switch protective device S4 of branch by host computer;
Leak current fault takes place in b, the first feeding switch protective device S2 of branch and the 3rd branch's feeding switch protective device S4 load-side simultaneously, the first feeding switch protective device S2 of branch, the 3rd feeding switch protective device S4 of branch and total feeding switch protective device M1 detect this fault simultaneously, the first feeding switch protective device S2 of branch and the 3rd feeding switch protective device S4 of branch protect separating brake immediately, and faulty line is cut off; The first feeding switch protective device S2 of branch, the 3rd feeding switch protective device S4 of branch and total feeding switch protective device M1 all attempt sending leak current fault information to the CAN bus, after the first feeding switch protective device S2 of branch that the identifier priority is the highest wins bus arbitration leak current fault information is sent, the 3rd higher feeding switch protective device S4 of branch of identifier priority still attempts sending fault message after losing bus arbitration, the 3rd feeding switch protective device S4 of branch successfully sends leak current fault information after treating the CAN bus recovery free time, total feeding switch protective device M1 detects leak current fault and gets rid of and recover the trial that normal condition and cancellation send leak current fault information behind the first feeding switch protective device S2 of branch and the 3rd feeding switch protective device S4 of branch separating brake, write down leak current fault information from the first feeding switch protective device S2 of branch and the 3rd feeding switch protective device S4 of branch successively by host computer;
Total circuit generation leak current fault between c, branch's feeding switch protective device and the total feeding switch protective device, only there is total feeding switch protective device M1 to detect this fault, total feeding switch protective device M1 attempts sending leak current fault information to the CAN bus, and described leak current fault information is successfully sent, total feeding switch protective device M1 protection separating brake, total circuit of electric leakage and afterwards first branched line, second branched line and the 3rd branched line by each branch's feeding switch protective device protection all are cut off; By the leak current fault information of host computer record from total feeding switch protective device M1;
D, certain moment, leak current fault takes place in total circuit (1), first branched line (2) and the 3rd branched line (4) simultaneously; The first feeding switch protective device S2 of branch, the 3rd feeding switch protective device S4 of branch and total feeding switch protective device M1 detect this fault simultaneously, the first feeding switch protective device S2 of branch and the 3rd feeding switch protective device S4 of branch protect separating brake immediately, the first feeding switch protective device S2 of branch, the 3rd feeding switch protective device S4 of branch and total feeding switch protective device M1 all attempt sending leak current fault information to the CAN bus, after the first feeding switch protective device S2 of branch that the identifier priority is the highest wins bus arbitration leak current fault information is sent, the 3rd higher feeding switch protective device S4 of branch of identifier priority still attempts sending leak current fault information after losing bus arbitration, the 3rd feeding switch protective device S4 of branch successfully sends leak current fault information after treating the CAN bus recovery free time, total feeding switch protective device M1 still detects leak current fault behind the first feeding switch protective device S2 of branch and the 3rd feeding switch protective device S4 of branch separating brake, total feeding switch protective device M1 attempts sending leak current fault information to the CAN bus, and described leak current fault information is successfully sent, total feeding switch protective device M1 protection separating brake, total circuit of electric leakage and first branched line afterwards by each branch's feeding switch protective device protection, second branched line and the 3rd branched line all are cut off; Write down leak current fault information successively by host computer from the first feeding switch protective device S2 of branch, the 3rd feeding switch protective device S4 of branch and the feeding switch protective device M1 of general branch;
E, circuit generation leak current fault, and each branch's feeding switch protective device tripping, then total feeding switch protective device M1 do not have behind the preset time of having delayed time selectively protects separating brake.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the present invention and external communication adopt CAN field bus control system mode, and the CAN bus is the many main machine structures bus with peak transfer rate 1 megabit per second.Node on the CAN bus is broadcasted data in network, any node that message is interested in can both receive these data, and knows that this information is to send wherefrom.The CAN agreement provides the method for multiple error detection and correction, if message destroyed it can detect and also network in all nodes can ignore this message, till this message can be sent to always and accurately be received, so the CAN bus still can be transmitted data exactly in the very big environment of electrical noise.Compare with traditional RS485 communication modes, the CAN bus mode is except obtaining higher communication speed and reliability, more advanced part is that the CAN bus protocol supports the bus arbitration of many main frames, that is to say, when bus is idle, any unit can begin to transmit message, and the unit with higher-priority message can obtain bus access power.If there are two or more unit to begin to transmit message simultaneously, then can solve this bus access conflict by the position form arbitration of using identifier, the higher node of identifier priority can win bus control right.The mechanism of arbitration guarantees that information and time all can not lose.
2, physical connection aspect, CAN bus and RS485 use the band Shielded Twisted Pair equally, and cabling requirement does not improve.If before had the RS485 network, then can directly utilize basically and need not other wiring.
Description of drawings:
Accompanying drawing is underground low voltage power system figure.
Among the figure: M1 is total feeding switch protective device, and S2 is that circuit 2 branch's feeding switch protective devices, S3 are that circuit 3 branch's feeding switch protective devices, S4 are circuit 4 branch's feeding switch protective devices.
Below by embodiment the present invention is further described:
Embodiment:
Present embodiment is to utilize the CAN bus to carry out communication; give the identifier of the different priority of CAN bus according to the residing level of feeding switch protective device; for low-voltage power supply system; the identifier priority that total feeding switch protective device M1 is set is minimum; the identifier priority order of each the feeding switch protective device S2 of circuit top set, S3 and S4 is higher, i.e. P
S2P
S3P
S4P
M1Earth leakage protecting method is: during arbitrary branch feeding switch protective device load-side generation leak current fault; branch's feeding switch protective device and total feeding switch protective device detect this fault simultaneously; this branch's feeding switch protective device wins bus arbitration according to the priority of its identifier; and information sent; host computer writes down this warning message, and total feeding switch protective device and the branch's feeding switch protective device that does not break down keep operate as normal.
As follows for the concrete protected mode of circuit shown in the drawings:
A, arbitrary branch feeding switch protective device load-side generation leak current fault, with circuit 4 is example, the feeding switch protective device S4 of branch and total feeding switch protective device M1 detect this fault simultaneously, and the feeding switch protective device S4 of branch protects separating brake immediately, and faulty line is cut off; The feeding switch protective device S4 of branch and total feeding switch protective device M1 all attempt sending electric leakage information to the CAN bus; after the higher feeding switch protective device S4 of branch of identifier priority wins bus arbitration information is sent; total feeding switch protective device M1 detects the leak current fault eliminating and recovers normal condition and cancel the trial that sends leak current fault information behind this branch's feeding switch protective device separating brake, host computer writes down the warning message of the feeding switch protective device S4 of branch.
Leak current fault takes place in a plurality of load-side simultaneously in b, each branch's feeding switch protective device; with circuit 2 and circuit 4 places is example; the feeding switch protective device S2 of branch, S4 and total feeding switch protective device M1 detect this fault simultaneously; feeding switch protective device S2 of branch and S4 protect separating brake immediately, and faulty line is cut off.The feeding switch protective device S2 of branch; S4 and total feeding switch protective device M1 all attempt sending electric leakage information to the CAN bus; after the feeding switch protective device S2 of branch that the identifier priority is the highest wins bus arbitration information is sent; the higher feeding switch protective device S4 of branch of identifier priority still attempts sending fault message after losing bus arbitration; S4 successfully sends information after treating the CAN bus recovery free time; total feeding switch protective device M1 detects the leak current fault eliminating and recovers normal condition and cancel the trial that sends leak current fault information behind feeding switch protective device S2 of branch and S4 separating brake, host computer has write down the warning message of S2 and S4 successively.
Circuit generation leak current fault between c, hypothesis branch feeding switch protective device and the total feeding switch protective device; it in this figure circuit 1 place; only there is total feeding switch protective device M1 to detect this fault; total feeding switch protective device M1 attempts successfully sending after the CAN bus sends electric leakage information; total feeding switch protective device M1 protection separating brake, electric leakage circuit 1 and circuit are afterwards all cut off from main line.Host computer can record the warning message of total feeding switch protective device M1.
D; suppose that leak current fault takes place certain moment many places circuit simultaneously; with circuit 1; 2 and 4 places are example; the feeding switch protective device S2 of branch; S4 and total feeding switch protective device M1 detect this fault simultaneously; feeding switch protective device S2 of branch and S4 protect separating brake immediately; the feeding switch protective device S2 of branch; S4 and total feeding switch protective device M1 all attempt sending electric leakage information to the CAN bus; after the feeding switch protective device S2 of branch that the identifier priority is the highest wins bus arbitration information is sent; the higher feeding switch protective device S4 of branch of identifier priority still attempts sending fault message after losing bus arbitration; S4 successfully sends information after treating the CAN bus recovery free time; total feeding switch protective device M1 still detects leak current fault behind feeding switch protective device S2 of branch and S4 separating brake; total feeding switch protective device M1 attempts successfully sending after the CAN bus sends electric leakage information; total feeding switch protective device M1 protection separating brake, electric leakage circuit 1 and circuit are afterwards all cut off from main line.Host computer can record the warning message of S2, S4 and M1 successively.
E, if circuit generation leak current fault, and branch's feeding switch tripping, then total feeding switch device does not have in the preset time of having delayed time (200ms) back selectively protects separating brake.
More than the protection process of several electric leakage situations be equally applicable to install on the same branch road situation of the feeder protection equipment of greater number.
Claims (1)
1; the method of selective leakage protection of electric feeding switch protector; it is characterized in that utilizing the CAN bus to carry out communication; give the identifier of the different priority of CAN bus according to the residing level of feeding switch protective device; comprise: the identifier priority that total feeding switch protective device (M1) is set is minimum; the identifier priority of first branch's feeding switch protective device (S2) is higher than second branch's feeding switch protective device (S3) identifier priority; second branch's feeding switch protective device (S3) identifier priority is higher than the identifier priority of the 3rd branch's feeding switch protective device (S4), then has:
A, the 3rd branch's feeding switch protective device (S4) load-side generation leak current fault, the 3rd branch's feeding switch protective device (S4) and total feeding switch protective device (M1) detect this fault simultaneously, the 3rd branch feeding switch protective device (S4) protects separating brake immediately, and faulty line is cut off; The 3rd branch's feeding switch protective device (S4) and total feeding switch protective device (M1) are all attempted sending leak current fault information to the CAN bus, after the 3rd higher branch feeding switch protective device (S4) of identifier priority wins bus arbitration leak current fault information is sent, total feeding switch protective device (M1) detects the leak current fault eliminating and recovers normal condition and cancel the trial that sends leak current fault information behind this branch's feeding switch protective device separating brake, write down the leak current fault information of described from the beginning the 3rd branch's feeding switch protective device (S4) by host computer;
Leak current fault takes place in b, first branch's feeding switch protective device (S2) and the 3rd branch's feeding switch protective device (S4) load-side simultaneously, first branch's feeding switch protective device (S2), the 3rd branch's feeding switch protective device (S4) and total feeding switch protective device (M1) detect this fault simultaneously, first branch's feeding switch protective device (S2) and the 3rd branch feeding switch protective device (S4) protect separating brake immediately, and faulty line is cut off; First branch's feeding switch protective device (S2), the 3rd branch's feeding switch protective device (S4) and total feeding switch protective device (M1) are all attempted sending leak current fault information to the CAN bus, after first branch feeding switch protective device (S2) that the identifier priority is the highest wins bus arbitration leak current fault information is sent, the 3rd higher branch feeding switch protective device (S4) of identifier priority still attempts sending fault message after losing bus arbitration, the 3rd branch feeding switch protective device (S4) successfully sends leak current fault information after treating the CAN bus recovery free time, total feeding switch protective device (M1) detects the trial that normal condition and cancellation transmission leak current fault information are got rid of and recovered to leak current fault behind first branch's feeding switch protective device (S2) and the 3rd branch's feeding switch protective device (S4) separating brake, write down leak current fault information from first branch's feeding switch protective device (S2) and the 3rd branch's feeding switch protective device (S4) successively by host computer;
Leak current fault takes place in the total circuit (1) between c, branch's feeding switch protective device and the total feeding switch protective device, only there is total feeding switch protective device (M1) to detect this fault, total feeding switch protective device (M1) is attempted sending leak current fault information to the CAN bus, and described leak current fault information is successfully sent, total feeding switch protective device (M1) protection separating brake, total circuit (1) of electric leakage and afterwards first branched line (2), second branched line (3) and the 3rd branched line (4) by each branch's feeding switch protective device protection all are cut off; By the leak current fault information of host computer record from total feeding switch protective device (M1);
D, certain moment, leak current fault takes place in total circuit (1), first branched line (2) and the 3rd branched line (4) simultaneously; First branch's feeding switch protective device (S2), the 3rd branch's feeding switch protective device (S4) and total feeding switch protective device (M1) detect this fault simultaneously, first branch's feeding switch protective device (S2) and the 3rd branch feeding switch protective device (S4) protect separating brake immediately, first branch's feeding switch protective device (S2), the 3rd branch's feeding switch protective device (S4) and total feeding switch protective device (M1) are all attempted sending leak current fault information to the CAN bus, after first branch feeding switch protective device (S2) that the identifier priority is the highest wins bus arbitration leak current fault information is sent, the 3rd higher branch feeding switch protective device (S4) of identifier priority still attempts sending leak current fault information after losing bus arbitration, the 3rd branch feeding switch protective device (S4) successfully sends leak current fault information after treating the CAN bus recovery free time, total feeding switch protective device (M1) still detects leak current fault behind first branch's feeding switch protective device (S2) and the 3rd branch's feeding switch protective device (S4) separating brake, total feeding switch protective device (M1) is attempted sending leak current fault information to the CAN bus, and described leak current fault information is successfully sent, total feeding switch protective device (M1) protection separating brake, total circuit (1) of electric leakage and first branched line (2) afterwards by each branch's feeding switch protective device protection, second branched line (3) and the 3rd branched line (4) all are cut off; Write down leak current fault information successively by host computer from first branch's feeding switch protective device (S2), the 3rd branch's feeding switch protective device (S4) and general branch's feeding switch protective device (M1);
E, circuit generation leak current fault, and each branch's feeding switch protective device tripping, then total feeding switch protective device (M1) does not have behind the preset time of having delayed time selectively protects separating brake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100410815A CN100499308C (en) | 2006-07-21 | 2006-07-21 | Method for selective leakage protection of electric feeding switch protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100410815A CN100499308C (en) | 2006-07-21 | 2006-07-21 | Method for selective leakage protection of electric feeding switch protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1901313A CN1901313A (en) | 2007-01-24 |
| CN100499308C true CN100499308C (en) | 2009-06-10 |
Family
ID=37657098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100410815A Expired - Fee Related CN100499308C (en) | 2006-07-21 | 2006-07-21 | Method for selective leakage protection of electric feeding switch protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100499308C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101582581B (en) * | 2008-08-14 | 2012-05-02 | 韩俊 | Electricity leakage-prevention and overcurrent protection device |
| CN101860007B (en) * | 2010-04-20 | 2012-08-15 | 山东卓尔电气有限公司 | Remote intelligent residual current monitoring and protection system |
| CN101834464A (en) * | 2010-05-11 | 2010-09-15 | 梅勒电气(武汉)有限公司 | Charging pile for electric vehicle |
-
2006
- 2006-07-21 CN CNB2006100410815A patent/CN100499308C/en not_active Expired - Fee Related
Non-Patent Citations (8)
| Title |
|---|
| 可通信式智能选择性漏电保护***的研究. 牟龙华，孟庆海，***.电工技术学报，第18卷第1期. 2003 |
| 可通信式智能选择性漏电保护***的研究. 牟龙华，孟庆海，***.电工技术学报，第18卷第1期. 2003 * |
| 基于CAN的漏电报警网络***. 夏继强，于书生，邢春香，李文奇.工矿自动化，第2期. 2006 |
| 基于CAN的漏电报警网络***. 夏继强，于书生，邢春香，李文奇.工矿自动化，第2期. 2006 * |
| 控制器局域网用于矿井漏电保护***的研究. 孟祥忠，曹娜，于群.煤矿自动化，第2期. 1999 |
| 控制器局域网用于矿井漏电保护***的研究. 孟祥忠，曹娜，于群.煤矿自动化，第2期. 1999 * |
| 矿井低压电网漏电保护的现状及发展趋势. 张长森，柯熙政.煤矿机电，第5期. 2005 |
| 矿井低压电网漏电保护的现状及发展趋势. 张长森，柯熙政.煤矿机电，第5期. 2005 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1901313A (en) | 2007-01-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104113048B (en) | A kind of power distribution network intelligent protection system | |
| US6008971A (en) | Fault protection arrangement for electric power distribution systems | |
| CN103354355B (en) | A kind of micro-capacitance sensor networking guard method and device | |
| JP2017537847A (en) | Decentralized protection system for section feeding of electric railway traction network | |
| CN110416979A (en) | AT subregion institute bus bar protecting method in one's power under all-parallel AT traction system mode | |
| CN103412239A (en) | Detecting and positioning method of bus coupler flashover fault in subway alternating current power system | |
| CN202142845U (en) | Short circuit override tripping locking device | |
| CN104242274A (en) | State variable differential protection method for power distribution network accessing to distributed power supply | |
| CN102185298B (en) | Relay protection method for power supply circuit based on communication network | |
| CN100499308C (en) | Method for selective leakage protection of electric feeding switch protector | |
| CN107732881A (en) | A kind of direct current network dc circuit breaker failure protection method and apparatus | |
| CN101162839B (en) | Circuit relay protection information exchange method and device thereof | |
| CN109412125A (en) | A kind of anti-leapfrog guard method of adaptation entirely suitable for Complicated Distribution Network | |
| CN108777476A (en) | A kind of locality protection method of the access of distributed generation resource containing inverter type power distribution network | |
| CN107946937A (en) | A kind of quick acting switching-off switchgear | |
| CN104924922B (en) | Bilateral combination jump protection system of direct-current traction power supply system based on digital communications | |
| CN104242343B (en) | A kind of quick off-the-line system and method for distributed power source | |
| CN205921371U (en) | Disconnected zero lacks looks protection device and power system fault positioner | |
| CN203660659U (en) | GOOSE (generic object oriented substation event) trip locking device | |
| CN109888728A (en) | A kind of stratification guard method | |
| CN101051581B (en) | Error identification method of digital transformer differential protection for preventing TA secondary loop fault | |
| CN107147090A (en) | Interlock tripper and two-sided anti-interference protection system based on fiber optic communication | |
| Kostin et al. | Protective and control relays as coal-mine power-supply ACS subsystem | |
| CN102279338A (en) | Method for monitoring two-phase grounding fault of magnetic levitation stator coil | |
| CN110932244A (en) | Relay protection method for no-switching of all-station protection outlet pressure plates of transformer substation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090610 Termination date: 20180721 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |