CN102412567A - Synthetical protector for controller area network (CAN) power system and using method thereof - Google Patents
Synthetical protector for controller area network (CAN) power system and using method thereof Download PDFInfo
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- CN102412567A CN102412567A CN2011103209994A CN201110320999A CN102412567A CN 102412567 A CN102412567 A CN 102412567A CN 2011103209994 A CN2011103209994 A CN 2011103209994A CN 201110320999 A CN201110320999 A CN 201110320999A CN 102412567 A CN102412567 A CN 102412567A
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Abstract
The invention relates to the field of power supply protection, in particular to a synthetical protector for a controller area network (CAN) power system and a using method thereof. The protector comprises a core processor, a voltage signal processing circuit, a current signal processing circuit, a zero-sequence signal processing circuit, a leakage signal processing circuit, a digital signal input circuit, a power management module, a display module, an outward communication module, a data storage and a tripping/switching signal output circuit. The synthetical protector has the beneficial effects that: real-time protection for the power system without delay substantially can be realized in low cost and in a way that the system is simply formed, grade skipping and switch skipping of the power system can be well prevented at the same time, and the problems in the prior art are solved.
Description
Technical field
The present invention relates to the power supply protection field, relate in particular to a kind of pair of CAN electric power system comprehensive protection device and method for using thereof.
Background technology
Present electric power system protection at different levels is for preventing to bypass the immediate leadership the tripping operation of skipping a grade, and adopted two kinds of methods: a kind of is the way that delay time differences at different levels are set the time; Another kind is that all equipment utilization CAN bus or optical fiber links together, and carries out unified management with a server or Centralized Controller then.
First method is the maximum of present actual usefulness, because each equipment sends the complete disjunction that breaking signal arrives mechanical mechanism detecting fault, is arranged the regular hour, supposes that this time is 50 milliseconds; The last level, it can realize real-time disjunction, its upper level; Will delay time 50 milliseconds, and declare subordinate and whether break off, just determine oneself whether disjunction; If do not add the disjunction of time-delay, just possibly become overstep tripping, enlarge the loss that fault causes.And its last upper level adds 50 milliseconds again again on the basis of upper level, declares whether disjunction of upper level, and like this, every many one-levels will increase by 50 milliseconds between time-delay.More than the progression one, this time will become very big, just can not realize the real-time protected, just lets fault result in greater loss probably.And if increase the real-time of protection system, reduced the time of time-delays at different levels, this just may cause overstep tripping, the loss of expansion fault.So under the many situation of power supply unit progression, be difficult to reach a balance.
Second method is a kind of solution that also is not used widely that occurs recently.It utilizes CAN bus or network, links together each equipment with optical fiber or twisted-pair feeder, carries out unified management with a server then.When fault takes place, send data-signal by detected protector and give server, differentiate the fault point by server, and then send breaking signal for the equipment of fault origination point, thereby realize more real-time disjunction by server.This method has solved the problem that first punching method exists; But, increased many extra costs, and owing to the equipment of each layer connects together with network owing to will increase a server; Can cause the communication time-delay can influence the real-time of protection owing to the obstruction of mass data during fault; Each equipment all needs independently not repeat to address (RA) in the network, has also increased the complexity of management, thereby increases management cost.If the grid line of certain is disconnected owing to fault or other reason, possibly influences the normal judgement of server, thereby influence the normal operation of whole system.
Summary of the invention
The present invention overcomes the weak point that exists in the prior art; Purpose is to provide a kind of pair of CAN electric power system comprehensive protection device; This protector can be low-cost, system constitutes succinct mode and realizes that electric power system do not have the real-time guard of time-delay basically; Also well prevent simultaneously the electric power system lock of bypassing the immediate leadership, solved the problem that exists in the prior art.
Another object of the present invention is to; A kind of pair of CAN electric power system comprehensive protection device method for using is provided; This method effectively prevents the short-circuit protection overstep tripping, and system is simple and clear, and working service is convenient; Can solve the vertical selectivity tripping operation of earth leakage protective and the leading circuit-breaker problem of uncapping, solve the problem that exists in the prior art.
The present invention achieves the above object through following technical scheme: a kind of pair of CAN electric power system comprehensive protection device; Comprise core microprocessors, voltage signal processing circuit, current signal treatment circuit, zero sequence signal treatment circuit, electric leakage signal treatment circuit, digital signal input circuit, power management module, display module, external communication module, data storage, divide-shut brake signal output apparatus; Core microprocessors is respectively with voltage signal processing circuit, current signal treatment circuit, zero sequence signal treatment circuit, electric leakage signal treatment circuit, digital signal input circuit, power management module, display module, externally communication module, data storage, divide-shut brake signal output apparatus link to each other; Described pair of CAN electric power system comprehensive protection device also comprises two CAN bus interface module CANI and CANII, CAN transceiver I and CAN transceiver II, and CANI links to each other with CAN transceiver I; CANII links to each other with CAN transceiver II.
As preferably, core microprocessors adopts the embedded high-speed microprocessor chip of built-in pair of CAN module.
A kind of pair of CAN electric power system comprehensive protection device method for using comprises the steps:
1) as claimed in claim 1 pair of CAN electric power system comprehensive protection device is installed on each grade power supply unit of electric power system; Its CAN transceiver I is connected through the CAN transceiver II of CAN bus with the two CAN electric power system comprehensive protection devices of higher level of electric power system, and CAN transceiver II is connected through the CAN transceiver I of CAN bus with the two CAN electric power system comprehensive protection devices of subordinate of electric power system;
2) if this pair CAN electric power system comprehensive protection device is the bottom of electric power system, the connection that then the CAN transceiver II in this protector need not be any; If this pair CAN electric power system comprehensive protection device is the superiors of electric power system, the connection that then the CAN transceiver I in this protector need not be any;
3) power-up initializing, the connection situation of detection CAN bus, and through providing prompting on the display module;
4) the arbitrary pair of CAN electric power system comprehensive protection device is after detecting electric power system the circuit abnormality that need open circuit is arranged; If CANI normally connects; Send signal from CANI to the two CAN electric power system comprehensive protection devices of higher level immediately, begin to get into the time-delay wait state simultaneously;
5) if do not receive the signal that the two CAN electric power system comprehensive protection devices of subordinate send during this, then send breaking signal, cut-off breaker immediately from CANII;
6) if receive the signal that the two CAN electric power system comprehensive protection devices of subordinate send from CANII during this, know that fault is that subordinate's electric power system takes place, then do not carry out breaking operation, finish time-delay and wait for, protection in support gets into the definite time protection state;
7) can't disjunction if carry out reasons such as the two CAN electric power system comprehensive protection devices of open-circuit operation stick together; Then send signal through CANI to the two CAN electric power system comprehensive protection devices of the higher level who gets into the definite time protection state immediately; Higher level's protector sends breaking signal immediately, cut-off breaker or contactor.
As preferably, the delay time of the described time-delay wait state of step 4) is less than 10 milliseconds.
Beneficial effect of the present invention: the present invention compares with the protective device that uses to electric power system at present; On the real-time of protection; Integral body is greatly improved; At aspects such as anti-overstep tripping, the vertical selectivity tripping operation of earth leakage protective, the leading circuit-breakers of uncapping remarkable advantages is arranged; It is many to have solved the power supply unit level, and subordinate equipment is short-circuited or major accident such as electric leakage needs under the situation of shortest time response disjunction, and higher level's power supply unit need be spent and wait for the situation whether subordinate responds between a lot of time-delays; And realize that cost is very low and easy to use, and do not use other equipment such as centralized manager or server and terminal etc., on original protector, only increased the little hardware cost; Also very convenient in the use operation in addition, the structure of dual CAN bus layer distributed makes equipment not need to be provided with in addition the address with the automatic characteristic that detects the free time, does not also need the short circuit delay times of establishing again at different levels.
Description of drawings
Fig. 1 is two CAN electric power system comprehensive protection device structure charts;
Fig. 2 is two CAN electric power system comprehensive protection device method for using structured flowcharts;
1---two CAN electric power system comprehensive protection device I;
2---two CAN electric power system comprehensive protection device II;
3---two CAN electric power system comprehensive protection device III;
4---two CAN electric power system comprehensive protection device IV;
Embodiment
Below in conjunction with specific embodiment the present invention is described further, but protection scope of the present invention is not limited in this:
As shown in Figure 1; A kind of pair of CAN electric power system comprehensive protection device; Comprise core microprocessors, voltage signal processing circuit, current signal treatment circuit, zero sequence signal treatment circuit, electric leakage signal treatment circuit, digital signal input circuit, power management module, display module, external communication module, data storage, divide-shut brake signal output apparatus; Core microprocessors is respectively with voltage signal processing circuit, current signal treatment circuit, zero sequence signal treatment circuit, electric leakage signal treatment circuit, digital signal input circuit, power management module, display module, externally communication module, data storage, divide-shut brake signal output apparatus link to each other; Described pair of CAN electric power system comprehensive protection device also comprises two CAN bus interface module CANI and CANII, CAN transceiver I and CAN transceiver II, and CANI links to each other with CAN transceiver I; CANII links to each other with CAN transceiver II, and CAN transceiver I links to each other with core microprocessors respectively with CAN transceiver II.Core microprocessors adopts the ARM embedded high-speed microprocessor chip of built-in pair of CAN module.
Two CAN electric power system comprehensive protection device methods for using are as shown in Figure 2:
As claimed in claim 1 pair of CAN electric power system comprehensive protection device is installed on each grade power supply unit of electric power system; Its CAN transceiver I is connected through the CAN transceiver II of CAN bus with the two CAN electric power system comprehensive protection devices of higher level of electric power system, and CAN transceiver II is connected through the CAN transceiver I of CAN bus with the two CAN electric power system comprehensive protection devices of subordinate of electric power system.If this pair CAN electric power system comprehensive protection device is the bottom of electric power system, the connection that then the CAN transceiver II in this protector need not be any; If this pair CAN electric power system comprehensive protection device is the superiors of electric power system, the connection that then the CAN transceiver I in this protector need not be any,
Power-up initializing, the connection situation of detection CAN bus, and through providing prompting on the display module.Fault point A point as between two CAN electric power system comprehensive protection device III3 and two CAN electric power system comprehensive protection device IV4 is short-circuited; The two CAN electric power system comprehensive protection device I1 of top layer, two CAN electric power system comprehensive protection device II2, two CAN electric power system comprehensive protection device III3 detect short circuit simultaneously; Two CAN electric power system comprehensive protection device II2, two CAN electric power system comprehensive protection device III3 send short-circuit signal through CANI to the two CAN electric power system comprehensive protection device I1 of top layer and two CAN electric power system comprehensive protection device II2 immediately; The two CAN electric power system comprehensive protection device I1 of top layer do not send because do not connect CANI; These three two CAN electric power system comprehensive protection devices get into 5 milliseconds time-delay waiting for the two CAN electric power system comprehensive protection device signals of subordinate simultaneously; The two CAN electric power system comprehensive protection device I1 of top layer and two CAN electric power system comprehensive protection device II2 receive the short circuit generation signals of the two CAN electric power system comprehensive protection device transmission of subordinate; The normal signal transmission time has known that less than 1 millisecond short circuit is that the two CAN electric power system comprehensive protection devices of subordinate take place down, just finishes time-delay; Protection in support gets into the definite time protection state.Two CAN electric power system comprehensive protection device III3 finish not receive the short-circuit signal that subordinate's feed sends from CANII when 5 millisecond time-delay, send breaking signal, cut-off breaker or contactor.If at this moment two CAN electric power system comprehensive protection device III3 are owing to other reasons such as adhesion can't disjunction the time; To the backup protection signal that two CAN electric power system comprehensive protection device II2 send the request disjunction, carry out disjunction through the CANI mouth by two CAN electric power system comprehensive protection device II2.Thus; The real-time guard of fault point, backup protection, also have the definite time protection of sizing of equipment, realized reliable triple protection, also effectively prevented overstep tripping; And protection delay time at different levels narrowed down to the shortest, well solved the contradiction between protection real-time and overstep tripping.
Above said be specific embodiment of the present invention and the know-why used, if the change of doing according to conception of the present invention, when the function that it produced does not exceed spiritual that specification and accompanying drawing contain yet, must belong to protection scope of the present invention.
Claims (4)
1. two CAN electric power system comprehensive protection device; Comprise core microprocessors, voltage signal processing circuit, current signal treatment circuit, zero sequence signal treatment circuit, electric leakage signal treatment circuit, digital signal input circuit, power management module, display module, external communication module, data storage, divide-shut brake signal output apparatus; Core microprocessors is respectively with voltage signal processing circuit, current signal treatment circuit, zero sequence signal treatment circuit, electric leakage signal treatment circuit, digital signal input circuit, power management module, display module, externally communication module, data storage, divide-shut brake signal output apparatus link to each other; It is characterized in that; Described pair of CAN electric power system comprehensive protection device also comprises two CAN bus interface module CANI and CANII, CAN transceiver I and CAN transceiver II, and CANI links to each other with CAN transceiver I; CANII links to each other with CAN transceiver II, and CAN transceiver I links to each other with core microprocessors respectively with CAN transceiver II.
2. a kind of pair of CAN electric power system comprehensive protection device according to claim 1 is characterized in that, core microprocessors adopts the embedded high-speed microprocessor chip of built-in pair of CAN module.
3. a two CAN electric power system comprehensive protection device method for using is characterized in that comprising the steps:
1) as claimed in claim 1 pair of CAN electric power system comprehensive protection device is installed on each grade power supply unit of electric power system; Its CAN transceiver I is connected through the CAN transceiver II of CAN bus with the two CAN electric power system comprehensive protection devices of higher level of electric power system, and CAN transceiver II is connected through the CAN transceiver I of CAN bus with the two CAN electric power system comprehensive protection devices of subordinate of electric power system;
2) if this pair CAN electric power system comprehensive protection device is the bottom of electric power system, the connection that then the CAN transceiver II in this protector need not be any; If this pair CAN electric power system comprehensive protection device is the superiors of electric power system, the connection that then the CAN transceiver I in this protector need not be any;
3) power-up initializing, the connection situation of detection CAN bus, and through providing prompting on the display module;
4) the arbitrary pair of CAN electric power system comprehensive protection device is after detecting electric power system the circuit abnormality that need open circuit is arranged; If CANI normally connects; Send signal from CANI to the two CAN electric power system comprehensive protection devices of higher level immediately, begin to get into the time-delay wait state simultaneously;
5) if do not receive the signal that the two CAN electric power system comprehensive protection devices of subordinate send during this, then send breaking signal immediately, cut-off breaker or contactor from CANII;
6) if receive the signal that the two CAN electric power system comprehensive protection devices of subordinate send from CANII during this, know that fault is that subordinate's electric power system takes place, then do not carry out breaking operation, finish time-delay and wait for, protection in support gets into the definite time protection state;
7) can't disjunction if carry out reasons such as the two CAN electric power system comprehensive protection devices of open-circuit operation stick together; Then send signal through CANI to the two CAN electric power system comprehensive protection devices of the higher level who gets into the definite time protection state immediately; The two CAN electric power system comprehensive protection devices of higher level send breaking signal, cut-off breaker immediately.
4. according to right 3 described a kind of pair of CAN electric power system comprehensive protection device methods for using, it is characterized in that the delay time of the described time-delay wait state of step 4) is less than 10 milliseconds.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110320999.4A CN102412567B (en) | 2011-10-17 | 2011-10-17 | Synthetical protector for controller area network (CAN) power system and using method thereof |
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| CN201110320999.4A CN102412567B (en) | 2011-10-17 | 2011-10-17 | Synthetical protector for controller area network (CAN) power system and using method thereof |
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| CN102412567A true CN102412567A (en) | 2012-04-11 |
| CN102412567B CN102412567B (en) | 2014-04-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329502A (en) * | 2016-11-11 | 2017-01-11 | 东华大学 | Relay protection method based on PLC and CAN bus technology |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201553473U (en) * | 2009-07-30 | 2010-08-18 | 合肥翔飞电子有限公司 | Integrated protection device of mine double bus belt conveyor |
| CN102157982A (en) * | 2011-03-31 | 2011-08-17 | 国电南瑞科技股份有限公司 | Intelligent terminal for power transformer |
| CN202495756U (en) * | 2011-10-17 | 2012-10-17 | 费江海 | Dual CAN power supply system comprehensive protector |
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2011
- 2011-10-17 CN CN201110320999.4A patent/CN102412567B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201553473U (en) * | 2009-07-30 | 2010-08-18 | 合肥翔飞电子有限公司 | Integrated protection device of mine double bus belt conveyor |
| CN102157982A (en) * | 2011-03-31 | 2011-08-17 | 国电南瑞科技股份有限公司 | Intelligent terminal for power transformer |
| CN202495756U (en) * | 2011-10-17 | 2012-10-17 | 费江海 | Dual CAN power supply system comprehensive protector |
Non-Patent Citations (1)
| Title |
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| 于庆广 等: "DS80C390双CAN总线分层分布式监控系统的设计及实现", 《仪器仪表学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106329502A (en) * | 2016-11-11 | 2017-01-11 | 东华大学 | Relay protection method based on PLC and CAN bus technology |
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