CN100424965C - The communication method of the distributed PC bus protection without the main station - Google Patents
The communication method of the distributed PC bus protection without the main station Download PDFInfo
- Publication number
- CN100424965C CN100424965C CNB2006100979012A CN200610097901A CN100424965C CN 100424965 C CN100424965 C CN 100424965C CN B2006100979012 A CNB2006100979012 A CN B2006100979012A CN 200610097901 A CN200610097901 A CN 200610097901A CN 100424965 C CN100424965 C CN 100424965C
- Authority
- CN
- China
- Prior art keywords
- bus protection
- protection unit
- bus
- sampling
- sampled data
- 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.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
This invention relates to micro computer bus wire communication method without host station, wherein, each protection unit sample data are sent by one fix direction recycle within T,Tat; the protection unit Pi receives last protection unit sent n-1 protection units at sample time and the orderly sample time data message; the protection unit Pi sends n-1 protection unit without protection unit to next protection unit at sample time for different sample time data message.
Description
Technical field
The present invention relates to a kind of means of communication of electric power system PC bus protection, particularly a kind of means of communication of not having the main website distributed PC bus protection.
Background technology
Bus is the important component part of power plant and electric substation, is element very important in the electric power system, is the hinge of sending out, failing, become, power.Equipment such as the generator in power plant, the transformer station, transformer, transmission line, supply line all play a role by bus.The reliability of bus work can influence the safe and stable operation of electric power system.
The self-checking function of microcomputer type relay protection is strong, operation maintenance convenient, therefore is subjected to the welcome of applying unit deeply, has obtained applying rapidly.PC bus protection is compared with analog protection and is had many good qualities: the general public spill current loop that need not be made of hardware; And utilize software compensation to solve the inconsistent problem of current transformer (TA) no-load voltage ratio; Be convenient to adopt the digital quantity computing to realize more complicated, reliable criterion etc.Referring to Li Ying, Yang Qixun. the discussion of distributed PC bus protection [J]. Automation of Electric Systems, 1999.23 (21): 45-47.
The microcomputer type bus protection of on-the-spot operation mostly is centralized bus protection at present.Centralized PC bus protection generally requires the current circuit of each bus Connection Element all will introduce protected location; by the microcomputer type bus protection digital quantity is handled and be converted to electric current, voltage and switching value, so that calculate, judge and handle according to certain algorithm.
In recent years; along with the appearance of unwatched transformer station and the development of automation of transformation substations technology; more and more stronger to the requirement that protection is transferred, along with the rapid raising of computer, communication technology level, relaying protection is transferred to the mode of switch yard and is implemented and obtain gradually approval.Referring to Cheng Lijun, Cai Min, Tang Tao, Que Lianyuan, Siemens's PC bus protection and development thereof [J]. Automation of Electric Systems, 2004.28 (10): 91-96.The factory station that voltage levvl is high more, floor space is big more, and it is also many more to consume cable, and the economic benefit that relaying protection is transferred is obvious more.Simultaneously, the appearance of the Fast Ethernet communication technology becomes a reality the microcomputer bus differential protecting of realizing dispersed placement.
The design philosophy of distributed bus protection is that bus protection is divided into a plurality of protected locations, and the unit number is identical with Connection Element number on the bus.Each bus protection unit independently is installed in respectively on the corresponding link circuit, has communication network to be connected between each unit.Each unit can be gathered electric current, the voltage in this loop.Receive the protection action situation of current data, on off state and other unit in other loop of sending here by communication network simultaneously.Can independent detection and the fault of judging bus after the unit calculates relatively to all loop data.In case certain protected location is judged as the bus troubles inside the sample space, only this loop is disconnected from bus, thereby can not influence other loop.Referring to Luo Shanshan, He Jiali, Li Yongli etc. the research of new distribution type PC bus protection [J]. Power System and its Automation journal, 1995,7 (4): 9-18.
Compare with centralized bus differential protecting, the dispersed placement scheme has more advantages:
(1) because the internal fault external fault of bus is taked to disperse the mode calculating, judge and handles, can not cause bus all to have a power failure owing to electromagnetic interference makes the hardware or software error judgement.
(2) will not focus on the differential relaying panel by all TA secondary cables, reduced the TA secondary circuit cable, make the TA secondary circuit obtain simplifying, reduced the expense of cable yet.
(3) unit is installed cable on the spot and is shortened greatly, has reduced the electric current secondary loop impedance, and the saturated of TA delayed.
(4) main protection easy and circuit or transformer is made up, and is standby mutually with backup protection.
(5) can cancel main website, reduce investment.
State, inside and outside research for the distributing bus differential protecting have for many years; the bus protection of microcomputer dispersed placement current differential principle is compared with centralized microcomputer bus differential protecting, and the subject matter that needs to solve is exactly real-time Transmission mass data and each distribution unit stationary problem.Data traffic is big, and it is complicated to cause communication network to constitute, even the complexity of communication network device might surpass relay protection device itself.Each distribution unit can not synchronized sampling, and protection just can not correct operation.Be limited to communication technology level at that time, the communication of microcomputer current differential bus protection is difficult to reach requirement, and this also is the main cause that the PC bus protection of dispersed placement is difficult to through engineering approaches.
The PC bus protection of dispersed placement in the past communicates to connect mode generally can be divided into two kinds: bus-type connected mode and ring-like connected mode.
1), bus-type connected mode
As shown in Figure 1, the order wire of all protected locations all is connected on the bus, and the data that each protected location sends send to other protected locations and supervisory control comuter in the broadcast data mode.In a sampling period; at first sent the data such as electric current, switching value of this unit in-site collecting by first protected location, other protected locations and supervisory control comuter receive data, wait after each protected location finishes receiving; second protected location sent the data of in-site collecting, and the rest may be inferred.Whether the data that all unit all must distribute self-collected data and receive other protected locations before each sampling period finishes trip according to the data decision of gathering and receiving then separately.Referring to Luo Shanshan, He Jiali, all filial piety etc. the application [J] of real time communication in superhigh pressure multiloop bus protection, Proceedings of the CSEE, 1999,19 (4): 1-3.This data transfer mode real-time is good, and protection can be moved rapidly during fault.But, owing in a sampling period, will send tens packets, consider light transmission time and each protected location processing time again, required communication rate is very high.For example, if when 24 protected locations are arranged on the bus, the speed of communicating requirement is at least 30～40Mbps, is difficult in stable under this speed, safety, long distance ground transmission data with present communication condition, influences the reliability of bus protection.In addition, form also more complicated of this bus-type connected mode with fiber optic network, it is all cumbersome to increase and decrease a circuit, is unfavorable for dilatation.
2), ring-like connected mode
As shown in Figure 2, all protected locations are interconnected to the dicyclo type, a main communication loop, and another is standby.Protected location is finished the respectively exchange of the image data between the protection with accumulate mode, and in conjunction with the sampled data transmission.The sample-synchronous monitoring also is responsible in the first unit that defines in all protected locations on the looped network except that the data collection and transmitting; middle each unit participates in scene data acquisition on the spot, accumulation calculating and transmission; fault judgement also is responsible in the unit, end except that the data collection, trip signal transmits realization on the net.Referring to Li Ying, Yang Qixun. the research of distributed PC bus protection (doctorate paper) [D]. Baoding: North China Electric Power University, 1999.
It is low that the advantage of this method is that traffic rate requires than series system; Shortcoming is that fault is judged and to be judged by last unit, the action that determines each unit again according to the result who judges whether, real-time is poor, its essence still is a kind of bus protection mode that main website is arranged, and can't realize not having the advantage of main website distribution bus protection.
More than the distributed bus protection communications of two kinds of no main websites form modes its weak point all arranged, still under test, be difficult to be applied in the actual engineering.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, and a kind of means of communication to the no main website distributed PC bus protection that the network transmission speed requirement is low, real-time, reliability is high are provided.
The technical solution adopted for the present invention to solve the technical problems is as follows: the means of communication of no main website distributed PC bus protection; for the continuous successively closed looped network of being formed in n PC bus protection unit greater than 1 that keeps synchronized sampling; the means of communication of its real-time distribution sampled data are: sampled data between the PC bus protection unit along a fixed-direction circulating transfer; if i is for more than or equal to 1 and be less than or equal to the integer of n, P
i TBe i PC bus protection unit P
iThe sampled data that obtains at sampling instant T, the sampling period [T, T+t) in, PC bus protection unit P
iReceive a last PC bus protection unit P
I-1What transmit does not contain PC bus protection unit P
iN-1 PC bus protection unit respectively at sampling instant T and trace back the sampled data message of different sampling instants: P successively
I-1 T, P
I-2 T-t..., P
2 T-(i-3) t, P
1 T-(i-2) t, P
n T-(i-1) t, P
N-1 T-(i) t..., P
I+2 T-(n-3) t, P
I+1 T-(n-2) t, these messages are by PC bus protection unit P
I-1At a last sampling period [T-t, T) the last PC bus protection unit P of interior reception
I-2Message in, remove and PC bus protection unit P through selecting
iRelevant data P
i T-(n-1) tAfter, with PC bus protection unit P
I-1Sampled data P in sampling instant T acquisition
I-1 TCombine; The sampling period [T, T+t) in, PC bus protection unit P
iTo next PC bus protection unit P
I+1Send and do not contain PC bus protection unit P
I+1N-1 PC bus protection unit respectively at sampling instant T and trace back the sampled data message of different sampling instants: P successively
i T, P
I-1 T-t, P
I-2 T-2t..., P
2 T-(i-2) t, P
1 T-(i-1) t, P
n T-(i) t, P
N-1 T-(i+1) t..., P
I+2 T-(n-2) t, these messages are by PC bus protection unit P
iAt a last sampling period [T-t, T) the last PC bus protection unit P of interior reception
I-1Message in, remove and PC bus protection unit P through selecting
I+1Relevant data P
I+1 T-(n-1) tAfter, with PC bus protection unit P
iSampled data P in sampling instant T acquisition
i TCombine.
Beneficial effect of the present invention is as follows: the real-time sampling data of PC bus protection unit are carried out unidirectional circulating transfer according to the above-mentioned means of communication; through n-1 sampling period; any one protected location in the closed looped network can obtain other protected locations in T sampled data constantly from network; together with this unit in T sampled data constantly; thereby the complete sampled data of having formed differential protection; through differential operational and logic determines, whether each protected location just can carry out fault judgement independently and move with decision.There is not master slave relation in closed hoop between online each PC bus protection unit, all is in the status of equality.Therefore; the present invention had both overcome the decline machine bus protection means of communication of substation that bus-type connects network transmission speed had been required height, shortcoming that reliability is low; the substation that the has overcome ring-like connection again machine bus protection means of communication that decline have only that last unit just can be judged, the shortcoming of real-time difference; thereby can reduce investment, satisfy the requirement of no main website distributed PC bus protection real-time communication well protected location hardware.
Description of drawings
Fig. 1 is the bus-type connected mode schematic diagram of existing distributed PC bus protection.
Fig. 2 is the ring-like connected mode schematic diagram of existing distributed PC bus protection.
Fig. 3 does not have the schematic diagram of the distributed PC bus protection means of communication embodiment of main website 1 for the present invention.
Fig. 4 does not have the schematic diagram of the distributed PC bus protection means of communication embodiment of main website 2 for the present invention.
Embodiment
With reference to the accompanying drawings and in conjunction with the embodiments the present invention is described in further detail.But the invention is not restricted to given example.
As shown in Figure 3; among the embodiment 1; with n=4 is example; the continuous successively closed looped network of being formed in 4 PC bus protection unit that keeps synchronized sampling; the means of communication of its real-time distribution sampled data are: along a fixed-direction circulating transfer, the tentation data direction of transfer passes to p2 by p1 to sampled data between protected location, and p2 passes to p3; p3 passes to p4; p4 passes to p1, is counterclockwise to transmit, and establishing t is the sampling period; when sample frequency is 1200Hz; get sampling period t=833 μ s as calculated, when sample frequency is 2400Hz, get sampling period t=417 μ s as calculated; T can be sampling instant arbitrarily, such as 8 o'clock sharps of Beijing time.
At arbitrary sampling period [T; T+t) in, all bus protection unit constantly begin sampling (front has sampled value) with regard to local bus at T, and the sampled data of acquisition comprises digital quantities such as the electric current of local bus and switching value; and with the unit code name and constantly subscript represent P for example
1T sampled value constantly in unit is expressed as P
1 TAfter sampling is finished; each protected location receives protected location transmits on it other 3 protected locations respectively at sampling instant T and trace back the sampled data message of different sampling instants successively; simultaneously, each protected location to next protected location send do not contain next protected location 3 protected locations respectively at sampling instant T and trace back the sampled data message of different sampling instants successively.Below be the description of concrete data transfer procedure:
In the T data that have of each protected location constantly:
P
1：P
1 T，P
4 T-t，P
3 T-2t，
P
2：P
2 T，P
1 T-t，P
4 T-2t，
P
3：P
3 T，P
2 T-t，P
1 T-2t，
P
4：P
4 T，P
3 T-t，P
2 T-2t，
The cycle [T, T+t) in the sampled data message that sends of each unit:
P
1To P
2Send: P
1 T, P
4 T-t, P
3 T-2t,
P
2To P
3Send: P
2 T, P
1 T-t, P
4 T-2t,
P
3To P
4Send: P
3 T, P
2 T-t, P
1 T-2t,
P
4To P
1Send: P
4 T, P
3 T-t, P
2 T-2t,
The cycle [T+t, T+2t) in the sampled data message that sends of each unit:
P
1To P
2Send: P
1 T+t, P
4 T, P
3 T-t
P
2To P
3Send: P
2 T+t, P
1 T, P
4 T-t
P
3To P
4Send: P
3 T+t, P
2 T, P
1 T-t
P
4To P
1Send P
4 T+t, P
3 T, P
2 T-t
The cycle [T+3t, T+4t) in the sampled data message that sends of each unit:
P
1To P
2Send: P
1 T+2t, P
4 T+t, P
3 T
P
2To P
3Send: P
2 T+2t, P
1 T+t, P
4 T
P
3To P
4Send: P
3 T+2t, P
2 T+t, P
1 T
P
4To P
1Send: P
4 T+2t, P
3 T+t, P
2 T
The data of transmitting from above each unit as can be seen; through 3 sampling periods; each protected location just can receive other 3 data that protected location is gathered constantly at T; the data of gathering constantly at T together with this unit; thereby the complete sampled data of having formed differential protection just can judge according to these data whether protection moves.For example, the sampling period [T, T+t), [T+t, T+2t), [T+2t, T+3t) in protected location P
1Just can receive P respectively
4 T, P
3 T, P
2 T, add P
1From the P that gathers constantly in T
1 TJust can determine protected location P
1Whether move, same, protected location P
2Also can receive P respectively
1 T, P
4 T, P
3 T, add the P that himself is gathered constantly at T
2 T, formed the T complete sampled data of differential protection constantly, just can determine protected location P
2Whether move P
3, P
4Similar with it.If the situation of n protected location then needs the time through n-1 sampling period, could judge T moment sampled data.
In order to reduce the time-delay of data processing; further improve the real-time that sampled data is transmitted; further aspect of the present invention is: sampled data along a fixed-direction and opposite direction circulating transfer thereof, is just carried out the bi-directional data transmission with the same means of communication in closed looped network between protected location.
As shown in Figure 4, embodiment 2 is an example with the closed looped network that 4 bus protection unit are formed still, and first direction is p
1Pass to p
2, p
2Pass to p
3, p
3Pass to p
4, p
4Pass to p
1, being the counter clockwise direction transmission of embodiment 1, transmission method is with embodiment 1; Second direction is p
1Pass to p
4, p
4Pass to p
3, p
3Pass to p
2, p
2Pass to p
1, be the clockwise direction transmission.The data transfer of second direction is: after sampling is finished; each protected location receives other 3 protected locations that its next protected location transmits respectively at sampling instant T and trace back the sampled data message of different sampling instants successively; simultaneously, each protected location upwards a protected location send 3 protected locations that do not contain a protected location and reach at sampling instant T respectively and trace back the sampled data message of different sampling instants successively.If t is the sampling period, when sample frequency is 1200Hz, get sampling period t=833 μ s as calculated, when sample frequency is 2400Hz, get sampling period t=417 μ s as calculated, T can be sampling instant arbitrarily, such as 8 o'clock sharps of Beijing time.Below be the description of second concrete data transfer procedure of direction:
In the T data that have of each protected location constantly:
P
1：P
1 T，P
2 T-t，P
3 T-2t
P
2：P
2 T，P
3 T-t，P
4 T-2t
P
3：P
3 T，P
4 T-t，P
1 T-2t
P
4：P
4 T，P
1 T-t，P
2 T-2t
The cycle [T, T+t) in the sampled data message that sends of each unit:
P
1To P
4Send: P
1 T, P
2 T-t, P
3 T-2t
P
2To P
1Send: P
2 T, P
3 T-t, P
4 T-2t
P
3To P
2Send: P
3 T, P
4 T-t, P
1 T-2t
P
4To P
3Send: P
4 T, P
1 T-t, P
2 T-2t
The cycle [T+t, T+2t) in the sampled data message that sends of each unit:
P
1To P
4Send: P
1 T+t, P
2 T, P
3 T-t
P
2To P
1Send: P
2 T+t, P
3 T, P
4 T-t
P
3To P
2Send: P
3 T+t, P
4 T, P
1 T-t
P
4To P
3Send: P
4 T+t, P
1 T, P
2 T-t
The cycle [T+2t, T+3t) in the sampled data message that sends of each unit:
P
1To P
4Send: P
1 T+2t, P
2 T+t, P
3 T
P
2To P
1Send: P
2 T+2t, P
3 T+t, P
4 T
P
3To P
2Send: P
3 T+2t, P
4 T+t, P
1 T
P
4To P
3Send: P
4 T+2t, P
1 T+t, P
2 T
In conjunction with above two examples as can be seen; in closed looped network, carry out the bi-directional data transmission; as long as through 2 sampling periods; each protected location just can receive other 3 data that protected location is gathered constantly at T; the data of gathering constantly at T together with this unit; thereby the complete sampled data of having formed differential protection just can judge according to these data whether protection moves.For example, the sampling period [T, T+t), [T+t, T+2t) in protected location P
1Just can on counterclockwise data passes direction, receive P respectively
4 t, P
3 t, on clockwise data passes direction, receive P respectively
2 t, P
3 t, as seen, in two cycles, received P
4 t, P
3 t, P
2 t, add P
1From the P that gathers constantly in T
1 t, formed the T complete sampled data of differential protection constantly, just can determine protected location P
1Whether move, same, protected location P
2Also can in two cycles, receive P
1 t, P
4 t, P
3 t, add the P that himself is gathered constantly at T
2 t. just can determine protected location P
2Whether move P
3, P
4Similar with it.If the situation of n protected location then needs the time through [n/2] the individual sampling period, just can judge T moment sampling quantity, wherein, the integer part of " [n/2] " expression n/2.
At present; the sampling of bus protection unit synchronously; can realize by hardware setting; in order further to improve the time precision of synchronized sampling; present embodiment by gps clock to the time realize the sampling of each bus protection units synchronization; GPS in 1 μ s, can satisfy the requirement of dispersed placement bus protection to the time error scope fully.Have a GPS interface on each bus protection unit, and dock with gps clock by data wire; Also can in each bus protection unit, settle a gps clock to realize.
With 24 bus protection unit is example; adopt optical fiber as transmission medium; sample frequency is 1200Hz; be to be 833 μ s in the sampling interval, the transmission time on online data road is 5 μ s, and the processing time of CPU is got 10 μ s; every troubleshooting, sampling time are got 100 μ s; the time that residue is handled communication is 718 μ s, if adopt the data one-way transmission, then Bao Hu communication delay is 19.159ms.If adopt the sample frequency of 2400Hz, and the mode that adopts data double-way to transmit, other conditions are constant, and then Bao Hu communication delay only is 5ms.
Suppose transformer, the inlet wire that articulates on the bus and go out line loop to be no more than 24; The data that need in bus protection are the three-phase electricity flow valuve, and each current value accounts for two bytes.Each data message comprises (24-1) * 3*2=138 byte.Therefore, when using ethernet frame, lead code comprises 8 bytes, destination address, each 6 byte of source address.Type field comprises 2 bytes, minimum 138 bytes that comprise of data field, and Frame Check Sequence comprises 4 bytes.Be totally 1312 of 164 bytes of each message.The sample rate of supposing protection is 1200Hz, and promptly the sampling interval is 833 μ s.The transmission time on online data road is 5 μ s, and the processing time of CPU is got 10 μ s, 100 μ s such as every troubleshooting, sampling.Then the time of residue processing communication is 833-5-10-100=718 μ s.Having message to be processed altogether is 1312bit.Realize the needed channel data transfer rate of this method as long as just passable greater than 1.83Mbps.
It is simple and reliable that this communication mode network is formed mode, and required communication rate is not high, can satisfy the communicating requirement of distributed bus protection fully, and this mode is also very convenient in programming.
Claims (5)
1. the means of communication of not having the main website distributed PC bus protection; for the continuous successively closed looped network of being formed in n PC bus protection unit greater than 1 that keeps synchronized sampling; the means of communication of its real-time distribution sampled data are: sampled data between the PC bus protection unit along a fixed-direction circulating transfer; if i is for more than or equal to 1 and be less than or equal to the integer of n, P
i TBe i PC bus protection unit P
iThe sampled data that obtains at sampling instant T, the sampling period [T, T+t) in, PC bus protection unit P
iReceive a last PC bus protection unit P
I-1What transmit does not contain PC bus protection unit P
iN-1 PC bus protection unit respectively at sampling instant T and trace back the sampled data message of different sampling instants: P successively
I-1 T, P
I-2 T-t..., P
2 T-(i-3) t, P
1 T-(i-2) t, P
n T-(i-1) t, P
N-i T-(i) t..., P
I+2 T-(n-3) t, P
I+1 T-(n-2) t, these messages are by PC bus protection unit P
I-1At a last sampling period [T-t, T) the last PC bus protection unit P of interior reception
I-2Message in, remove and PC bus protection unit P through selecting
iRelevant data P
i T-(n-1) tAfter, with PC bus protection unit P
I-1Sampled data P in sampling instant T acquisition
I-1 TCombine; The sampling period [T, T+t) in, PC bus protection unit P
iTo next PC bus protection unit P
I+1Send and do not contain PC bus protection unit P
I+1N-1 PC bus protection unit respectively at sampling instant T and trace back the sampled data message of different sampling instants: P successively
i T, P
I-1 T-t, P
I-2 T-2t..., P
2 T-(i-2) t, P
1 T-(i-1) t, P
n T-(i) t, P
N-1 T-(i+1) t..., P
I+2 T-(n-2) t, these messages are by PC bus protection unit P
iAt a last sampling period [T-t, T) the last PC bus protection unit P of interior reception
I-1Message in, remove and PC bus protection unit P through selecting
I+1Relevant data P
I+1 T-(n-1) tAfter, with PC bus protection unit P
iSampled data P in sampling instant T acquisition
i TCombine.
2. the means of communication of no main website according to claim 1 distributed PC bus protection is characterized in that: sampled data between the PC bus protection unit along a fixed-direction and circulating transfer in the other direction thereof.
3. the means of communication of no main website according to claim 1 and 2 distributed PC bus protection is characterized in that: online each the bus PC bus protection unit of closed hoop by gps clock to the time realize each bus PC bus protection units synchronization sampling.
4. the means of communication of no main website according to claim 1 and 2 distributed PC bus protection is characterized in that: the sample frequency of described microcomputer bus PC bus protection unit is 1200Hz.
5. the means of communication of no main website according to claim 1 and 2 distributed PC bus protection is characterized in that: the sample frequency of described microcomputer bus PC bus protection unit is 2400Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100979012A CN100424965C (en) | 2006-11-21 | 2006-11-21 | The communication method of the distributed PC bus protection without the main station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100979012A CN100424965C (en) | 2006-11-21 | 2006-11-21 | The communication method of the distributed PC bus protection without the main station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1996710A CN1996710A (en) | 2007-07-11 |
| CN100424965C true CN100424965C (en) | 2008-10-08 |
Family
ID=38251684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100979012A Active CN100424965C (en) | 2006-11-21 | 2006-11-21 | The communication method of the distributed PC bus protection without the main station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100424965C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103715766B (en) * | 2013-12-18 | 2015-12-30 | 南京国电南自电网自动化有限公司 | A kind of looped network decentralized bus protection synchronous method |
| CN105977925B (en) * | 2016-06-20 | 2018-03-27 | 南京国电南自电网自动化有限公司 | A kind of adaptive bus protection implementation method that should have main frame and off host pattern |
| CN107681639B (en) * | 2017-09-26 | 2019-11-12 | 南京国电南自电网自动化有限公司 | A kind of site bus protection relay system and its guard method |
| CN110176974B (en) * | 2019-05-30 | 2021-04-06 | 郑州轨道交通信息技术研究院 | Data sampling synchronization method, device and unit for wide-area relay protection |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4237550A (en) * | 1979-06-08 | 1980-12-02 | International Telephone And Telegraph Corporation | Multiuser protected optical data bus distribution systems |
| CN1256539A (en) * | 1999-11-25 | 2000-06-14 | 李元龙 | Microcomputer bus protection using the integration of multiple element current variables as main parameter of criterion |
| CN2453593Y (en) * | 2000-08-02 | 2001-10-10 | 南京南瑞集团公司 | Networked low voltage bus protector |
| CN1320993A (en) * | 2001-04-17 | 2001-11-07 | 北京四方同创保护与控制设备有限公司 | Distributed bus protection method without central unit and its device |
| JP2002254996A (en) * | 2001-03-02 | 2002-09-11 | Yazaki Corp | Node protecting system and node protecting device |
| US20030235152A1 (en) * | 2002-06-21 | 2003-12-25 | Nec Corporation | Network system incorporating protection paths in the transmission bandwidth of a virtual concatenation signal |
| JP2004015868A (en) * | 2002-06-04 | 2004-01-15 | Toshiba Corp | Protection control system and differential protection relay of electric station |
| US20040078620A1 (en) * | 2002-08-02 | 2004-04-22 | Corrigent Systems Ltd. | Equipment protection using a partial star architecture |
| US20040153870A1 (en) * | 2001-04-26 | 2004-08-05 | Konz Daniel W. | System and method for maintaining proper termination and error free communication in a network bus |
-
2006
- 2006-11-21 CN CNB2006100979012A patent/CN100424965C/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4237550A (en) * | 1979-06-08 | 1980-12-02 | International Telephone And Telegraph Corporation | Multiuser protected optical data bus distribution systems |
| CN1256539A (en) * | 1999-11-25 | 2000-06-14 | 李元龙 | Microcomputer bus protection using the integration of multiple element current variables as main parameter of criterion |
| CN2453593Y (en) * | 2000-08-02 | 2001-10-10 | 南京南瑞集团公司 | Networked low voltage bus protector |
| JP2002254996A (en) * | 2001-03-02 | 2002-09-11 | Yazaki Corp | Node protecting system and node protecting device |
| CN1320993A (en) * | 2001-04-17 | 2001-11-07 | 北京四方同创保护与控制设备有限公司 | Distributed bus protection method without central unit and its device |
| US20040153870A1 (en) * | 2001-04-26 | 2004-08-05 | Konz Daniel W. | System and method for maintaining proper termination and error free communication in a network bus |
| JP2004015868A (en) * | 2002-06-04 | 2004-01-15 | Toshiba Corp | Protection control system and differential protection relay of electric station |
| US20030235152A1 (en) * | 2002-06-21 | 2003-12-25 | Nec Corporation | Network system incorporating protection paths in the transmission bandwidth of a virtual concatenation signal |
| US20040078620A1 (en) * | 2002-08-02 | 2004-04-22 | Corrigent Systems Ltd. | Equipment protection using a partial star architecture |
Non-Patent Citations (6)
| Title |
|---|
| 分布式微机母线保护的探讨. 李营，杨奇逊.电力系统自动化，第23卷第21期. 1999 |
| 分布式微机母线保护的探讨. 李营，杨奇逊.电力系统自动化，第23卷第21期. 1999 * |
| 分布式母线保护新型通讯方案的研究. 王风光.华北电力大学硕士学位论文. 2005 |
| 分布式母线保护新型通讯方案的研究. 王风光.华北电力大学硕士学位论文. 2005 * |
| 分布式母线保护通讯系统的研究. 彭谦.华北电力大学硕士学位论文. 2004 |
| 分布式母线保护通讯系统的研究. 彭谦.华北电力大学硕士学位论文. 2004 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1996710A (en) | 2007-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101841446B (en) | Pilot channel transmission device, optical fiber differential protective device and method | |
| CN110048507B (en) | Automatic inspection method and system for power distribution automation system | |
| CN202103478U (en) | Comprehensive intelligent distribution box | |
| CN104020374A (en) | Intelligent substation secondary equipment site-wide simulation test system | |
| CN211296946U (en) | Railway electric power comprehensive operation and maintenance management system | |
| CN101576743A (en) | Distributed ring main unit monitor terminal | |
| CN103200280B (en) | Transformer station process layer interface equipment | |
| CN104993596A (en) | A distribution network automation remote terminal unit based on embedded multiple ARM processors | |
| CN104701991B (en) | The repair method of relay protection device of intelligent substation | |
| CN100424965C (en) | The communication method of the distributed PC bus protection without the main station | |
| CN102983627B (en) | Transition method of intellectualized monitoring system modification process of conventional transformer substation | |
| CN202649381U (en) | GOOSE-based small-current grounding route selection system of intelligent transformer substation | |
| KR101048496B1 (en) | Remote Power Control System Using Distributed Network Protocol | |
| CN101741145B (en) | Traditional switch intelligent interface device for digitized transformer substation | |
| CN104730397A (en) | Interoperation test system and method between distribution automation terminals | |
| CN206756967U (en) | A kind of distributed intelligence substation relay protection test device | |
| CN102832708A (en) | Intelligent transformer substation based on integrated multi-stage server framework | |
| CN203502802U (en) | Converter module control system | |
| CN112350869A (en) | Method and system for detecting point-to-point time response performance of substation automation system | |
| CN103389421A (en) | Island detection method and device based on GOOSE communication | |
| CN108233990B (en) | Dual-channel broadband carrier collector based on dual-active architecture | |
| CN209545252U (en) | A kind of intelligent substation management system | |
| CN204046656U (en) | Be applied to the medium-voltage carrier system of rural power grids Ji Chaopingtai | |
| CN102946109A (en) | Wide area damping control system of electric system based on event trigger | |
| CN210201394U (en) | Signal monitoring lightning protection junction box |
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 | ||
| ASS | Succession or assignment of patent right |
Owner name: GUODIAN NANNUI TECH CO., LTD. Free format text: FORMER OWNER: NANJING AUTOMATION RESEARCH INSTITUTE Effective date: 20091127 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20091127 Address after: High road high tech Development Zone of Nanjing city of Jiangsu Province, No. 20 zip code: 210061 Patentee after: NARI Technology Development Co., Ltd. Address before: Nanjing City, Jiangsu Province, South ruilu No. 8 zip code: 210003 Co-patentee before: Nanjing Nari Co., Ltd. Patentee before: Nanjing Automation Research Institute of national network |
|
| ASS | Succession or assignment of patent right |
Owner name: NARI NANJING CONTROL SYSTEM LTD. Effective date: 20141205 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20141205 Address after: High road high tech Development Zone Nanjing city Jiangsu province 210061 No. 20 Patentee after: NARI Technology Development Co., Ltd. Patentee after: SGCC NARI Nanjing Control System Co., Ltd. Address before: High road high tech Development Zone Nanjing city Jiangsu province 210061 No. 20 Patentee before: NARI Technology Development Co., Ltd. |