CN101471557A - Digital current differential protection relay - Google Patents
Digital current differential protection relay Download PDFInfo
- Publication number
- CN101471557A CN101471557A CNA2008100958918A CN200810095891A CN101471557A CN 101471557 A CN101471557 A CN 101471557A CN A2008100958918 A CNA2008100958918 A CN A2008100958918A CN 200810095891 A CN200810095891 A CN 200810095891A CN 101471557 A CN101471557 A CN 101471557A
- Authority
- CN
- China
- Prior art keywords
- data
- transmission
- end data
- cycle
- control part
- 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.)
- Granted
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention provides a digital current differential protective relay which can shorten the fixed time of protection function in recovering even a transmission bit error occurs. In a transmission format which is used in the transmission path between the two ends, a transmission format which can transmit the high-speed communication of a plurality of data in one transmission period is used, such as a transmission format in the transmission path with the transmission speed of 2048kbps. A transmission control part 9 transmits all end data necessary for the differential operation of the operating part 11 of the other end in one transmission period. Therefore, when the data of present transmission period is normal, namely when the transmission bit mirror occurs in front other transmission periods, the differential operation can be executed only with the data of present transmission period at the state without waiting for the restoring time of data.
Description
Technical field
The present invention relates to employed digital current differential protection relay in a kind of power transmission line protection of guard interval of electric power system.
Background technology
In the protection of power transmission line; adopt following method; each digital current differential protection relay that promptly is disposed at each end of guard interval was sampled to the power line current of local side with certain cycle; (Pulse Code Modulation: pulse code modulation) data of resulting local side are transmitted in communication mutually between two ends to use PCM; perhaps use these data and data that computing obtains; thereby adopt local side and to the differential operational of each end data of square end; under the situation of the transmission line fault in detecting guard interval; distolateral circuit breaker is exported cut-off signal so that circuit breaker moves to this locality, thereby cuts off the power transmission line of this guard interval from electric power system.
Because using PCM to communicate by letter like this, digital current differential protection relay carries out the interval protection, thus be also referred to as the PCM current differential relay, but transmission speed adopts the situation of 54kbps or 64kbps many.In addition, transformat is shown in Fig. 2 .16 (b) of non-patent literature 1, and 1 transmission cycle i.e. time width of 1 frame is for example electrical degree 30 degree (if system frequency is 50Hz, then being 1.667ms) of system frequency.
No. the 641st, [non-patent literature 1] electric association technical report " protection relay system basic fundamental system ", in July, 1997 is compiled by protection relay system basic fundamental investigation special commission
But, in PCM current differential relay in the past, because in 1 transmission cycle and to square end between send to receive the data of 1 execution cycle, so at local side, must in memory, store received data, and from memory, read the data in needed a plurality of cycles of computing once more and carry out computing square end.Therefore the problem that exists is; if in the transmission data of 1 transmission cycle, take place under the situation of bit error; transmission data in this transmission cycle are carried out invalidation; then before the storage with needed a plurality of cycles of differential operational finishes during; can not carry out differential operational, the blocked time of defencive function is elongated.
For example, when in the effective value computing, adopting the formula (1) of the data between electrical degree 90 degree used system frequency, can not carry out differential operational during till after the transmitted bit error is recovered, spending to the electrical degree 90 of system frequency.In addition, in formula (1), I (t) is present data constantly.In addition, T is and 30 ° of moment corresponding of electrical degree, and I (t-3T) is the data in the moment before 90 ° of the electrical degrees.
[mathematical expression 1]
In addition, when in the effective value computing, adopting the formula (2) of the data between electrical degree 120 degree used system frequency, can not carry out differential operational during till after the transmitted bit error is recovered, spending to the electrical degree 120 of system frequency.In addition, in formula (2), I (t-T) is the data in the moment before 30 ° of the electrical degrees, and I (t-4T) is the data in the moment before 120 ° of the electrical degrees.
[mathematical expression 2]
In addition, as mentioned above, in the transmitted bit error takes place, because it is invalid that the current data (Wave data) of square end is become, even so when having preserved fault data, if the transmitted bit error takes place, thereby the current data that then also exists square end becomes the problem of not knowing to become discrete date in data are preserved.
Summary of the invention
The present invention is in view of the above problems and design, even purpose is to obtain a kind of generation transmitted bit error, also can seeks to shorten the digital current differential protection relay of blocked time of defencive function when recovering.
In order to reach above-mentioned purpose, digital current differential protection relay of the present invention, it is characterized in that having: be disposed at each end of guard interval and transmit mutually respectively and reach the resulting end of square end data to obtain transmission control part to the end data of square end at local side by being arranged at transmission path between two ends; And adopted at the obtained differential operational of above-mentioned local side resulting end data and above-mentioned transmission control part to the end data of square end, thereby the transmission line in the above-mentioned guard interval is carried out the operational part of fault detect, in this digital current differential protection relay, above-mentioned transmission control part comprises: the current data that will obtain after will sampling to the transmission line choke on the local end with some cycles, perhaps above-mentioned operational part carries out the data that obtain after the computing as above-mentioned end data and be stored in function in the memory to this current data with some cycles; And in 1 transmission cycle of above-mentioned transmission path, adopt the transformat to carry the 1.5Mbps of a plurality of data or the high-speed communications more than the 2048kbps, and in above-mentioned 1 transmission cycle, send above-mentioned end data and be stored in the function of the end data of a plurality of execution cycles in the above-mentioned memory, above-mentioned operational part adopts above-mentioned end data and the end data that are stored in a plurality of execution cycles in the above-mentioned memory at local side, and above-mentioned transmission control part receive handled from end data to a plurality of execution cycles that in 1 transmission cycle, sent of square end, thereby carry out above-mentioned differential operational.
If employing the present invention is even then because the transmitted bit error takes place, also can seek to shorten the blocked time of defencive function, so play the effect of the reliability that improves defencive function when recovering.
Description of drawings
Fig. 1 is the block diagram of expression according to the formation of the digital current differential protection relay of an example of the present invention.
Fig. 2 is the G.704 schematic diagram of the transformat of the 2048kbps of middle defined of ITU-T.
The schematic diagram of Fig. 3 transformat (one of them) that to be expression generated when the data of a plurality of different execution cycles of transmission in 1 transmission cycle.
The schematic diagram of Fig. 4 transformat that to be expression generated when the data of a plurality of different execution cycles of transmission in 1 transmission cycle (wherein two).
The schematic diagram of Fig. 5 be expression when a plurality of data of the same execution cycle of transmission in 1 transmission cycle transformat of being generated.
Fig. 6 is illustrated in 1 transmission cycle the data that send the same execution cycle of many groups and the schematic diagram of the transformat that generated during with its data that obtain after oppositely.
Fig. 7 is the schematic diagram that the expression transmission error is collected the data of losing because of the transmission error transformat when recovering when recovering.
Label declaration
1 power transmission line
2 system side current transformers (CT)
3 circuit breakers
4 relay side current transformers (CT)
5 filters (FIL)
6 sampling hold circuits (S/H)
The 7AD converter
8 memories (Mem)
9 transmission control parts
10 optical interfaces
11 operational parts
12 control signals
13 data/address buss
14 data output section (DO)
15 data input part (DI)
16 photoelectric transformers (O/E)
17 electrical optical converters (E/O)
18 have the communicator of the communication function of 2048kbps
20 microwave transmission paths
21,22 light transmission paths
25 digital current differential protection relays (PCM current differential relay)
Embodiment
Explain the best example of the relevant digital current differential protection relay of the present invention with reference to the accompanying drawings.
Example
Fig. 1 is the block diagram of expression according to the structure of the digital current differential protection relay of an example of the present invention.In addition, in Fig. 1, only expression is disposed at the part of an end of guard interval.On the other end, also dispose identical structure.
As shown in Figure 1, on the corresponding end of the power transmission line 1 of guard interval, be equipped with: the system side current transformer (CT) 2 that takes out the electric current of power transmission line 1; And carry out the circuit breaker 3 that power transmission line 1 separates with system, to this, disposed digital current differential protection relay (PCM current differential relay) 25 and communicator 18.In addition, in this example, owing to the PCM communication of carrying out with the transmission speed of for example 2048kbps between the guard interval two ends, so in order to show this point, to " 2M " of communicator 18 titled with the transmission speed of expression 2048kbps.
PCM current differential relay 25 comprises: the relay side CT4 that is connected with system side CT2; Remove the filter (FIL) 5 of the noise contribution that is comprised in the output of relay side CT4; The sampling hold circuit (S/H) 6 of the output of filter 5 being sampled and keep with the moment of the specified some cycles of control signal 12; Carry out digitized AD converter 7 with the sampled value that the resolution of stipulating is kept sampling hold circuit 6; Carry out the memory (Mem) 8 of end storage; Except sending the control that receives, add the affirmation of the correctness that receives data and the transmission control part 9 of Synchronization Control; Interface between transmission control part 9 and the light transmission path 22 is an optical interface 10; Carry out the operational part 11 of differential operational; And digital efferent (DO) 14 that is connected with operational part 11 and digital input part (DI) 15 etc.
The above-mentioned control signal 12 of transmission control part 9 output, thus make it possible to sampling hold circuit 6 is satisfied and to the sampling action of the synchronism of square end.In addition, memory 8 is connected with AD converter 7, transmission control part 9 and operational part 11 respectively by data/address bus 13.
In the above-described configuration, the system power of the local side that system side CT2 is taken out from power transmission line 1 is taken in this PCM digital current differential relay 25 with relay side CT4.Then, be input in the AD converter 7 by filter operational part 5, sampling hold circuit 6, and be transformed to current data.The current data that AD converter 7 will be exported one by one is as above-mentioned end data, and by data/address bus 13 it write and stores in the address of the specified memory 8 of transmission control part 9.
The converting optical signals that will output to the 2048kbps in the light transmission path 22 with photoelectric transformer (O/E) 16 becomes ITU-TG.703 to reach the G.704 bipolar signal of telecommunication of middle defined, and is taken in the 2M communication system 18.2M communication system 18 will receive the bipolar signal of telecommunication from 16 of photoelectric transformers (O/E) by microwave transmission path 20 or light transmission path 21 and be transferred to the 2M communicator to square end.
In addition, 2M communicator 18 will be the bipolar signal of telecommunication from the received signal transformation of 2M communicator to square end by microwave transmission path 20 or light transmission path 21.The bipolar signal of telecommunication after the conversion is transformed into light signal with electrical optical converter (E/O) 17, and is input in the transmission control part 9 by light transmission path 22, optical interface 10.
On the other hand, for the end data that can not normally receive, the moment of these end data of transmission control part 9 record be execution cycle (promptly, the address of memory 8), becoming under the situation that can normally receive, to square end require being sent these end data that can not normally receive, obtaining data, and it is stored in this moment position of memory 8.In addition, receive from the other side's termination when transmission control part 9 to send when requiring, from memory 8, take out of the processing of corresponding data to carry out sending to square end.
Then, the transmission control relevant with this example that transmission control part 9 is carried out is described.At first, Fig. 2 is the schematic diagram of the transformat of the 2048kbps of defined among the expression ITU-TG.704.As shown in Figure 2,1 frame of the transformat of the 2048kbps of defined among the ITU-TG.704 (1 transmission cycle) is the formation of time width 125 μ ms and 256 bits, and is divided into 30 channels (ch1～ch30).
Like this, owing to (for example be arranged at transformat that employed transformat in the transmission path between both ends uses the high-speed communications that can carry a plurality of data in 1 transmission cycle, in transmission speed is employed transformat in the transmission path of 2048kbps), so in 1 transmission cycle, can send square end is carried out necessary all data of differential operational.Therefore, if the data of current transmission cycle are normal, even the transmitted bit error then takes place in other transmission cycle of its front, also can only use the data of current transmission cycle to carry out differential operational under the situation of the memory time again of not waiting pending data.Various control forms shown in the result can be achieved as follows.
The transmission digital coding that transmission control part 9 will send to square end becomes transmission control (following (1)～(4)) corresponding Fig. 3～shown in Figure 7 transformat relevant with this example, and it is stated from the transformat shown in Figure 2, output to light transmission path 22 by optical interface 10.The reception data that are taken into from light transmission path 22 also are the forms of transformat shown in Figure 2.
In addition, as Fig. 3～shown in Figure 7, the transformat that transmission control part 9 is generated is made of each data of " synchronization frame " " A phase current data " " B phase current data " " C phase current data " " control data " " control data " " CRC " " CRC ".Comprise the on off state of circuit breaker or switch in the control data, from the information of the control signal of outside input, the validity of data etc., be used to obtain the data of frame synchronization etc.
(1) schematic diagram of Fig. 3 and Fig. 4 transformat that to be expression generated when the data of a plurality of different execution cycles of transmission in 1 transmission cycle (one of them, wherein two).Transmission control part 9 is when the data of the end of a plurality of execution cycles of transmission in 1 transmission cycle, which of formula (3) and formula (4) below using according to operational part 11, and adopt the end data of up-to-date execution cycle and be stored in the end data of a plurality of execution cycles in the memory 8, use the end data of transformat in 1 transmission cycle, to send shown in Figure 2 thereby generate.
Promptly, under operational part 11 uses following formula (3) as the arithmetic expression of the effective value of finding the solution difference between current situation, because in the computing of this effective value, need the data " currency data I d (t) " and the data in the moment before electrical degree 90 degree " data I d (t-3T) before 90 degree " of current time, so transmission control part 9 is prepared those end data as mentioned above, and to its additional CRC etc., as shown in Figure 3, generate the transformat 32 of the currency data among the ch1 that inserts transformat shown in Figure 2 respectively, and the transformat 33 that inserts data before electrical degree 90 degree among the ch2, and be stated from and give optical interface 10 on the transformat shown in Figure 2.In this case, the ch3～ch30 in the transformat shown in Figure 2 becomes obsolete zone.
[mathematical expression 3]
In addition, under operational part 11 uses following formula (4) as the arithmetic expression of the effective value of finding the solution difference between current situation, because in the computing of this effective value, need currency data " Id (t) ", the data in the moment before electrical degree 30 degree " data I d (t-T) before 30 degree ", the data " data I d (t-4T) before 120 degree " in the moment before data in the moment before electrical degree 90 degree " data I d (t-3T) before 90 degree " and electrical degree 120 degree, so transmission control part 9 is prepared those end data as mentioned above, and to its additional CRC etc., as shown in Figure 4, generate the output format 35 of the currency data among the ch1 that inserts transformat shown in Figure 2 respectively, insert the transformat 36 of the preceding data of electrical degree 30 degree among the ch2, insert the transformat 37 of the preceding data of electrical degree 90 degree among the ch3, and the transformat 38 that inserts data before electrical degree 120 degree among the ch4, and be stated from and give optical interface 10 on the transformat shown in Figure 2.In this case, the ch5～ch30 in the transformat shown in Figure 2 becomes obsolete zone.
By like this; owing to can in 1 transmission cycle, send necessary all data of differential operational in the other side end; so in the other side end; if the reception data in this transmission cycle are normal; even then the transmission error from the past resets; also can under the situation of not waiting for time data memory, carry out differential operational, shorten the blocked time of defencive function.
(2) schematic diagram of Fig. 5 transformat that to be expression generated when a plurality of ends data of the same execution cycle of transmission in 1 transmission cycle.Transmission control part 9 is when sending the end data of a plurality of same execution cycles with 1 transmission cycle, in the end of up-to-date execution cycle data be stored in the end data of using a plurality of identical operation cycle in the end data of a plurality of execution cycles in the memory 8, use transformat shown in Figure 2 with 1 data that transmission cycle was sent thereby generate.
Promptly, transmission control part 9 as shown in Figure 5, prepare 3 currency data as mentioned above, and to its additional CRC etc., thereby generate to insert respectively the currency data among the ch1 of transformat shown in Figure 2 transformat 42, insert the transformat 43 of the currency data among the ch2 and the transformat 44 that inserts the currency data among the ch3, and be stated from and give optical interface 10 on the transformat shown in Figure 2.In this case, the ch4～ch30 in the transformat shown in Figure 2 becomes obsolete zone.
To square end, usually the CRC of the data of inspection ch1 and ch2 and data is consistent inconsistent, if OK, then use the data of ch1 to carry out differential operational, but,, then compare ch1 and the data of ch2 and the data of ch3 if the CRC of the side of ch1 and ch2 or both sides' data is incorrect or data are inconsistent, have CRC correct and with the data conditions of the data consistent of ch3 under, the data of the ch that this is consistent are used as valid data.
By like this,,, and improved the reliability of protecting so the probability of locking protection reduces even,, then can proceed differential operational as long as other the data more than 2 be effectively because bit error etc. occurs and become when invalid at certain ch.In addition, owing to checked the homogeneity of the data more than 2, so also can improve the reliability of data.
(3) Fig. 6 be illustrated in 1 transmission cycle the data that send the same execution cycle of many groups (on the occasion of) and the schematic diagram of the transformat that generated during with its data (reverse value) that obtain after oppositely.Transmission control part 9 the end data that send the same execution cycle of many groups with 1 transmission cycle (on the occasion of) and during with its data (reverse value) that obtain after oppositely, in the end of up-to-date execution cycle data and be stored in the end data that adopt many groups identical operation cycle in the end data of a plurality of execution cycles in the above-mentioned memory on the occasion of and reverse value, use transformat shown in Figure 2 and the data that in 1 transmission cycle, sent thereby generate.
Promptly, transmission control part 9 as shown in Figure 6, prepare 2 currency data as mentioned above, and to its additional CRC etc., thereby generate to insert respectively among the ch1 of transformat shown in Figure 2 the currency data on the occasion of transformat 52, insert the currency data reversal value among the ch2 transformat 53, insert among the ch3 the currency data on the occasion of transformat 54 and the transformat 55 that inserts the currency data reversal value among the ch4, and be stated from and give optical interface 10 on the transformat shown in Figure 2.In this case, the ch5～ch30 in the transformat shown in Figure 2 becomes obsolete zone.
On to square end, owing to utilize CRC to detect, detect the integrality of data on the occasion of the paired detection of reverse value, so improved the reliability of data.In addition; even because become under the invalid situation because of bit error etc. in which group data; as long as the CRC of other group in data, be normal on the occasion of reverse value; just can use this paired data to continue differential operational; so reduced the probability of locking defencive function, and improved the reliability of protection.
(4) Fig. 7 is the schematic diagram that the expression transmission error is collected the data of losing because of the transmission error transformat when recovering when recovering.Transmission control part 9 is in above-mentioned (1), and the data that collection is lost because of transmission error when transmission error is recovered are to recover.In addition, in Fig. 7, transmission error takes place when using and the transformat of use when it is recovered in the shown in Figure 3 transformat of expression use formula when (3).
In Fig. 7, transmission control part 9 generates the transformat 63 of data before 90 ° of the transformat 62 of the currency data among the ch1 that inserts transformat shown in Figure 2 and the electrical degrees among the insertion ch2 respectively, and it is stated from gives optical interface 10 on the transformat shown in Figure 2 repeatedly.As mentioned above, the ch3～ch30 in the transformat shown in Figure 2 becomes obsolete zone.
On to square end, if transmission control part 9 detects the generation transmission error, the end storage that transmission abnormality then will not take place is in memory 8 and carry out invalidation, write down the end operation of data cycle (being the address of memory 8) of this generation transmission abnormality simultaneously, when in the period of residual a plurality of ends data that 1 transmission cycle that comprises the end data that above-mentioned transmission abnormality takes place arranged in the memory 8 at two ends above-mentioned transmission abnormality being recovered, generate data and send the transformat 64 that requires, it is rectified not using in the zone of a plurality of ends data in 1 transmission cycle of normal transmitting-receiving not being loaded with the other side of transformat shown in Figure 2, in example shown in Figure 7, insert among the ch3 and give optical interface 10.
Send in the transformat 64 that requires in this data, be loaded with each data of " have data send require " " data number (N-M+1) " moment (before the N execution cycle) of legacy data " " " moment of latest data (before the M execution cycle) ".
The transmission control part 9 to square end that receives the transformat 64 of this data transmission requirement takes out desired operational data from memory 8, and to its additional CRC etc., as shown in Figure 7, generate to insert transformat 66 respectively, and it is stated from gives optical interface 10 on the transformat shown in Figure 2 as data before the 30 ° * M of transformat 65～electrical degree of data before the 30 ° * N of electrical degree among the ch4～ch (4+N-M) that does not use the zone of transformat shown in Figure 2.
Carry out transmission control part 9 that data send the local side that requires with the 30 ° * N of electrical degree that receives before before the 30 ° * M of data～electrical degree storage in this address of memory 8, thereby the state storage that a succession of end data that nothing can be lost are reproduced with the form of arranging on the time series is in memory 8.
Like this, in end on one side, because the discontinuous end data that cause can reproduce because of the generation systems fault time, during transmission error etc., so the Fault analytical etc. that can strive for simplification.In addition, in Fig. 7, be the situation (Fig. 3) of use formula (3) under expression above-mentioned (1) situation, but be applicable to the situation (Fig. 4) of use formula (4) certainly too.
In addition, in Fig. 1, as the communication system between two ends, though expression is to transmitting with light signal near the communicator and it being transformed to the formation of the signal of telecommunication with the input communication device near communicator from the PCM current differential relay, but the present invention is not limited only to this, also can application examples as connecting the formation between PCM current differential relay and the communicator with metallic cable or optical cable or directly not being connected communication system arbitrarily such as formation between the PCM current differential relay with metallic cable or optical cable by communicator.
Industrial practicality
As mentioned above, though the relevant digital current differential protection relay of the present invention for transmitted bit takes place Error can shorten the blocked time of defencive function when recovering be useful with the situation that improves defencive function .
Claims (4)
1. a digital current differential protection relay is characterized in that,
Digital current differential protection relay has: be disposed at power transmission line guard interval each end and by be arranged at that transmission path between two ends is transmitted in local side mutually and end data that square end is obtained separately to obtain transmission control part to the end data of square end; And use and carry out differential operational in described guard interval, to carry out the operational part of the fault detect of power transmission line in end data and the obtained end data of described transmission control part that described local side obtains to square end; in this digital current differential protection relay
Described transmission control part has:
To carry out computing resulting data as described end storage function in memory in some cycles to this current data to sample resulting current data or described operational part of the power line current in the local side with some cycles; And
Thereby use can be carried the 1.5Mbps of a plurality of data or the high-speed communications more than the 2048kbps in 1 transmission cycle of described transmission path transformat sends described end data and is stored in the function of the end data of a plurality of execution cycles in the described memory at described 1 transmission cycle
Described operational part use the described end data of local side and be stored in a plurality of execution cycles in the described memory the end data and by described transmission control part receive processing from end data to a plurality of execution cycles that in 1 transmission cycle, send of square end, thereby carry out described differential operational.
2. the digital current differential protection relay described in claim 1 is characterized in that,
Described transmission control part has:
When detecting the transmission abnormality data the many groups end data in 1 transmission cycle receiving from the other side's termination, end storage that this transmission abnormality will not take place is in described memory and carry out invalidation, the function in the end operation of data cycle of this transmission abnormality takes place record simultaneously;
When the described memory at two ends residual have many groups end data in 1 transmission cycle that comprises the end data that described transmission abnormality takes place during in not the using in the zone of many groups end data when recovering described transmission abnormality, in 1 transmission cycle that normally receive and dispatch not being loaded with of described transformat and the other side end, the transmission of end data that is loaded with the execution cycle of described record requires to notify the function to square end;
From the described memory of local side, extract from square end is used and describedly do not use the end data of the execution cycle shown in the requiring that the zone sends and it is stated from the described zone of not using to send to the function to square end by described transmission; And
According to described transmission requirement will from square end is used described do not use end storage that the zone sends in the described memory of local side thereby to because of the function that end data that described transmission abnormality loses are regenerated takes place.
3. a digital current differential protection relay is characterized in that,
Digital current differential protection relay has: be disposed at power transmission line guard interval each end and by be arranged at that transmission path between two ends is transmitted in local side mutually and end data that square end is obtained separately to obtain transmission control part to the end data of square end; And use and carry out differential operational in described guard interval, to carry out the operational part of the fault detect of power transmission line in end data and the obtained end data of described transmission control part that described local side obtains to square end; in this digital current differential protection relay
Described transmission control part has:
To carry out computing resulting data as described end storage function in memory in some cycles to this current data to sample resulting current data or described operational part of the power line current in the local side with some cycles;
Thereby use can be carried the function of many groups end data that execution cycle is identical in the end data of a plurality of execution cycles of transformat in described 1 transmission cycle is sent in described end data and is stored in described memory of the 1.5Mbps of a plurality of data or the high-speed communications more than the 2048kbps in 1 transmission cycle of described transmission path; And
To in handling from reception that the many groups end data in 1 transmission cycle of square end are carried out, the homogeneity inspection of carrying out the integrity checking of each end data and the many groups end data in 1 transmission cycle to be extracting the function of whole end data,
The end data that described operational part uses described transmission control part to be extracted are carried out described differential operational with the end data at the local side place of correspondence.
4. a digital current differential protection relay is characterized in that,
Digital current differential protection relay has: be disposed at power transmission line guard interval each end and by be arranged at that transmission path between two ends is transmitted in local side mutually and end data that square end is obtained separately to obtain transmission control part to the end data of square end; And use and carry out differential operational in described guard interval, to carry out the operational part of the fault detect of power transmission line in end data and the obtained end data of described transmission control part that described local side obtains to square end; in this digital current differential protection relay
Described transmission control part has:
To carry out computing resulting data as described end storage function in memory in some cycles to this current data to sample resulting current data or described operational part of the power line current in the local side with some cycles;
Thereby use in 1 transmission cycle of described transmission path, can carry execution cycle is identical in the end data of a plurality of execution cycles of transformat in described 1 transmission cycle is sent in described end data and is stored in described memory of the 1.5Mbps of a plurality of data or the high-speed communications more than the 2048kbps many groups end data on the occasion of and the function of reverse value; And
To in handling from reception that the many groups end data in 1 transmission cycle of square end are carried out, carry out the integrity checking of each end data and respectively organize the end data on the occasion of with reverse value concern inspection extracting the function of whole end data,
The end data that described operational part uses described transmission control part to be extracted are carried out described differential operational with the end data at the local side place of correspondence.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007341040 | 2007-12-28 | ||
| JP2007-341040 | 2007-12-28 | ||
| JP2007341040A JP5258286B2 (en) | 2007-12-28 | 2007-12-28 | Digital current differential protection relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101471557A true CN101471557A (en) | 2009-07-01 |
| CN101471557B CN101471557B (en) | 2012-10-03 |
Family
ID=40828757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100958918A Expired - Fee Related CN101471557B (en) | 2007-12-28 | 2008-05-07 | Digital current differential protection relay |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5258286B2 (en) |
| CN (1) | CN101471557B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103311911A (en) * | 2013-07-11 | 2013-09-18 | 中国船舶重工集团公司第七0四研究所 | Network type differential protection device for boat and differential protection output determining method |
| CN103947064A (en) * | 2011-11-25 | 2014-07-23 | 株式会社东芝 | Transmission line protective relay device |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5508921B2 (en) * | 2010-04-05 | 2014-06-04 | 株式会社日立製作所 | Distributed digital protection relay |
| JP5542027B2 (en) * | 2010-10-28 | 2014-07-09 | 三菱電機株式会社 | Digital protection control device |
| JP5734668B2 (en) * | 2011-01-06 | 2015-06-17 | 株式会社東芝 | Protection control measuring device |
| JP2013090445A (en) * | 2011-10-18 | 2013-05-13 | Toshiba Corp | Power system protection system |
| JP6034059B2 (en) * | 2012-05-31 | 2016-11-30 | 株式会社東芝 | Current differential protection relay |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0618458B2 (en) * | 1986-08-20 | 1994-03-09 | 株式会社日立製作所 | Data transmission method in current differential relay |
| JP2922418B2 (en) * | 1994-04-13 | 1999-07-26 | 中部電力株式会社 | Signal transmission method for system stabilization |
| JP3930394B2 (en) * | 2002-08-06 | 2007-06-13 | 株式会社東芝 | Digital protection control device |
-
2007
- 2007-12-28 JP JP2007341040A patent/JP5258286B2/en not_active Expired - Fee Related
-
2008
- 2008-05-07 CN CN2008100958918A patent/CN101471557B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103947064A (en) * | 2011-11-25 | 2014-07-23 | 株式会社东芝 | Transmission line protective relay device |
| CN103311911A (en) * | 2013-07-11 | 2013-09-18 | 中国船舶重工集团公司第七0四研究所 | Network type differential protection device for boat and differential protection output determining method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101471557B (en) | 2012-10-03 |
| JP2009165235A (en) | 2009-07-23 |
| JP5258286B2 (en) | 2013-08-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101471557B (en) | Digital current differential protection relay | |
| KR100465944B1 (en) | Digital protective relay | |
| CA1139415A (en) | Multi-terminal protective relay system | |
| JP5399592B1 (en) | Merging unit that collects power system information | |
| KR101322753B1 (en) | Digital protection relay device and data transmission device for digital protection relay device | |
| CN107493120B (en) | Integrated device integrating power line carrier communication and fault detection and positioning functions | |
| CN102714406A (en) | Control system, transformer, security control device, and bitstream memory unit | |
| CN103019141B (en) | Control module, control method and electric power dynamic recording device and implementation method thereof | |
| CA1312362C (en) | Fault detection signal transmission system | |
| CN107276053B (en) | A kind of equipment for protecting optical fibre longitudinal difference and method of data synchronization | |
| CN101207278A (en) | Feed line automatization terminal | |
| JP5508921B2 (en) | Distributed digital protection relay | |
| CN103116564A (en) | Time slot multiplexing single two-way backplane bus and redundancy protective method thereof | |
| CN201868863U (en) | Multifunctional relay protection signal remote transmission channel switch apparatus | |
| JPH09200947A (en) | Current differential protective relay and its processing method | |
| WO1982001094A1 (en) | Error monitoring in digital transmission systems | |
| JP2680507B2 (en) | Digital protection relay | |
| CN105652756A (en) | Safe multichannel data collection system | |
| JPH09289535A (en) | Information communication device | |
| JP2693831B2 (en) | Auxiliary signal transmission method | |
| Yan et al. | Research on the sampling reliability of process layer device in smart substation | |
| JPH0446056B2 (en) | ||
| JP2796094B2 (en) | Transmission line failure detection method | |
| KR0174669B1 (en) | Failure Detection Device in Sept Transmission Equipment | |
| JPH0618458B2 (en) | Data transmission method in current differential relay |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121003 Termination date: 20190507 |