CN107247214B - A kind of integrated line protection, travelling wave ranging method - Google Patents
A kind of integrated line protection, travelling wave ranging method Download PDFInfo
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- CN107247214B CN107247214B CN201710526162.2A CN201710526162A CN107247214B CN 107247214 B CN107247214 B CN 107247214B CN 201710526162 A CN201710526162 A CN 201710526162A CN 107247214 B CN107247214 B CN 107247214B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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Abstract
The invention discloses a kind of integrated line protections, travelling wave ranging method, it is combined by protection DSP unit start-up criterion with the starting of traveling wave DSP unit, effectively reduce the frequent error starting of travelling wave ranging, and by the way that cache element is divided into four caching subelement circulation storage traveling wave ranging datas, and each travelling wave ranging data are transferred to data storage in time, so that starting closely spaced multiple traveling wave fault location data will not be capped, solve the problems, such as that data caused by frequent starting are capped or lose, and the precision of protection DSP sampling is improved in such a way that two kinds of setting are extracted sampling unit, improving measuring distance of transmission line fault precision, resource in station is saved simultaneously, it has a good application prospect.
Description
Technical field
The present invention relates to line protection technical fields, and in particular to a kind of integrated line protection, travelling wave ranging
Method.
Background technique
For a long time, the fault localization of ultra-high-tension power transmission line is by most attention.The accurate of ultra-high-tension power transmission line failure is determined
Position can be shortened fault correction time, improve power supply reliability, reduce loss of outage.Currently, ultra-high-tension power transmission line protection based on
The algorithm of power frequency quantity ranging is influenced to cause range accuracy error big by many factors；Travelling wave ranging has not by system operation side
The influence characteristics such as formula and CT saturation, can be accurately positioned line fault point, and still, individual traveling wave ranging device occupies in substation
The resource of substation, and generally travelling wave rangings can only be carried out to several routes simultaneously.For this problem, existing solution party
Method is to increase individual traveling wave DSP plug-in unit newly on existing line protective devices, includes high speed acquisition unit and traveling wave in plug-in unit
DSP unit increases individual current transformer measurement current traveling wave, borrows original protection channel and is used to exchange the survey of two sides traveling wave
Away from data, traveling wave DSP plug-in unit is used to high speed acquisition traveling wave data and carries out fault localization calculating using both-end distance measuring algorithm.
Although the combination of the two improves line fault range accuracy to a certain extent and reduces travelling wave ranging money in station
The occupancy in source, still, the problem of traveling wave ranging device needs frequent starting, is not well solved still.In actual motion
In, traveling wave ranging device the problem of there is frequent error startings, real number of faults is often missed or is washed out in frequent starting
According to record, inconvenience is brought to operation and maintenance, although improving the starting threshold of traveling wave DSP unit in traveling wave DSP plug-in unit, energy
The problem of enough mitigating frequent starting, but to detect that traveling wave reaches and postpone constantly, will affect the precision of travelling wave ranging, how gram
Above-mentioned problem is taken, is current urgently to be solved.
Summary of the invention
The purpose of the present invention is overcoming the problems, such as that there is frequent error startings for traveling wave ranging device in the prior art, frequently
The problem of starting is often missed or is washed out real fault data recorder, brings inconvenience to operation and maintenance.The present invention
Integrated line protection, travelling wave ranging method, started by protection DSP unit start-up criterion and traveling wave DSP unit and combined,
The frequent error starting of travelling wave ranging is effectively reduced, efficiently solves that data caused by frequent starting are capped or that loses asks
Topic is improving measuring distance of transmission line fault precision, while saving resource in station, has a good application prospect.
In order to achieve the above object, the technical scheme adopted by the invention is that:
A kind of integrated line protection, travelling wave ranging method, it is characterised in that: include the following steps,
Step (A), when bringing into operation after device initialization, can linear transform transient current travelling waves and voltage traveling wave exchange
D.C mutual-inductor output signal in plug-in unit is sampled through high speed acquisition unit, and sends cache element to；
Step (B), cache element recycle storage, two pumpings of sample decimation unit in caching subelement A first
It takes unit synchronized sampling to work, first by the sampled result of the first extracting unit E, sends protection DSP unit to；
Step (C), if protecting starting after protection DSP unit operation, sample decimation unit receives protection location enabling signal,
The sampled result of second extracting unit F is transmitted to protection DSP unit and carries out fault logic operation；If protecting DSP unit inactive
Or after starting returns, sample decimation unit will transmit the sampled result of the first extracting unit E, and protection DSP unit is protected with this
Ship sth. under guard calculation；
Step (D), protection DSP unit pass through operation, obtain protecting whether start, in area positive direction element whether act and
The signal whether protection acts, if being then sent to traveling wave DSP unit；
Step (E), traveling wave DSP unit reads the data in cache element, and judges whether startup separator ranging, wraps
The condition that following two mode meets startup separator ranging is included, (E1) traveling wave DSP unit receives the protection act of protection DSP unit
Signal；(E2) traveling wave DSP unit starts and receives protection DSP unit enabling signal, and positive direction element movement signal in area；
Step (F), if traveling wave DSP unit startup separator ranging, traveling wave DSP unit records markers this moment, and starts timing
The data that high speed acquisition unit is transmitted are continued caching to caching subelement B and caching subelement C by device 1, and caching subelement B is slow
After the completion of depositing, traveling wave DSP unit caches data conversion storage in above-mentioned caching subelement A and caching subelement B to data storage
Subelement C continues cycling through memory buffers data, and executes step (C) and (H)；If preceding fault localization starting does not return, therefore
Barrier ranging is again started up, and is executed step (G)；
Step (G), if the starting of a preceding fault localization does not return, when fault localization is again started up, traveling wave DSP unit record
Markers this moment starts timer 2, and the data of high speed acquisition unit transmission are deposited simultaneously to caching subelement D and caching subelement A
In, cache unit D caching after the completion of, traveling wave DSP unit by it is above-mentioned be buffered in caching subelement C and cells D in data conversion storage extremely
Data storage, caching subelement A continues cycling through memory buffers data, and executes step (C) and (H)；If fault localization is again
Starting, return step (F)；
Step (H), markers when traveling wave DSP unit starts according to the fault localization of record are deposited from data storage reading
The traveling wave data of storage carry out fault localization calculating, obtain travelling wave ranging result.
A kind of integrated line protection above-mentioned, travelling wave ranging method, it is characterised in that: step (A), the high speed are slow
Memory cell includes four cachings subelement A, B, C, D, and each caching subelement storage address is continuous each other, and capacity is consistent.
A kind of integrated line protection above-mentioned, travelling wave ranging method, it is characterised in that: step (B), the sampling are taken out
Taking unit includes the first extracting unit E and the second extracting unit F.
A kind of integrated line protection above-mentioned, travelling wave ranging method, it is characterised in that: the first extracting unit E,
For by m sampled point averaged；The second extracting unit F extracts sampling according to m sampled point, between the two phase
Connection, synchronism output sampled value, wherein m be high-speed sampling unit sample frequency divided by protection DSP unit sample frequency after
Rounding value.
A kind of integrated line protection above-mentioned, travelling wave ranging method, it is characterised in that: step (H), traveling wave DSP are mono-
Member carries out fault localization calculating by double-end distance measurement method；When the optical-fibre channel of line protection is out of service or two sides
Sampled data is asynchronous, when being unsatisfactory for double-end distance measurement method condition, then carries out fault localization calculating by single end distance measurement method.
A kind of integrated line protection above-mentioned, travelling wave ranging method, it is characterised in that: step (H), the traveling wave
The traveling wave data that DSP unit reads data storage storage are voltage traveling wave data or current traveling wave data.
The beneficial effects of the present invention are: integrated line protection of the invention, travelling wave ranging method, by protecting DSP
The starting of unit starting criterion and traveling wave DSP unit is combined, and effectively reduces the frequent error starting of travelling wave ranging, and by will be high
Fast cache unit is divided into four caching subelement circulation storage traveling wave ranging datas, and each travelling wave ranging data are timely
It is transferred to data storage, so that starting closely spaced multiple traveling wave fault location data will not be capped, is efficiently solved
The problem of data caused by frequent starting are capped or lose, and guarantor is improved in such a way that two kinds of extraction sampling units are set
The precision for protecting DSP sampling is improving measuring distance of transmission line fault precision, while saving resource in station, before having good application
Scape.
Detailed description of the invention
Fig. 1 is the flow chart of integrated line protection of the invention, travelling wave ranging method；
Fig. 2 is the system block diagram of cache element of the invention；
Fig. 3 is the system block diagram of sample decimation unit of the invention；
Fig. 4 is the fault localization start-up criterion figure of integrated line protection of the invention, travelling wave ranging.
Specific embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
According to above-mentioned integrated line protection, the integrated line protection of the device of travelling wave ranging, travelling wave ranging
Method, as shown in Figure 1, include the following steps,
Step (A), when bringing into operation after device initialization, can linear transform transient current travelling waves and voltage traveling wave exchange
D.C mutual-inductor output signal in plug-in unit is sampled through high speed acquisition unit, and sends cache element to；Preferably, high speed
Cache unit includes four cachings subelement A, B, C, D, and each caching subelement storage address is continuous each other, and capacity is consistent, such as Fig. 2
It is shown；
Step (B), cache element recycle storage, two pumpings of sample decimation unit in caching subelement A first
It takes unit synchronized sampling to work, first by the sampled result of the first extracting unit E, protection DSP unit is sent to, as shown in figure 3, adopting
Sample extracting unit includes the first extracting unit E and the second extracting unit F, the first extracting unit E, is used for m sampled point
Averaged；The second extracting unit F extracts sampling according to m sampled point, is connected between the two, synchronism output is adopted
Sample value, wherein m is the sample frequency of high-speed sampling unit divided by the rounding value after the sample frequency of protection DSP unit, for example,
When the sample frequency of DSP unit being protected to be 1200Hz, the sample frequency of cache element is 2MHz；First extracting unit E will
1666 sampled points are sent after averaging to protection DSP unit；Second extracting unit F extracts sampling according to 1666 spaced points and send
To protection DSP unit；
Step (C), if protecting starting after protection DSP unit operation, sample decimation unit receives protection location enabling signal,
The sampled result of second extracting unit F is transmitted to protection DSP unit and carries out fault logic operation；If protecting DSP unit inactive
Or after starting returns, sample decimation unit will transmit the sampled result of the first extracting unit E, and protection DSP unit is protected with this
Ship sth. under guard calculation；
Step (D), protection DSP unit pass through operation, obtain protecting whether start, in area positive direction element whether act and
The signal whether protection acts, if being then sent to traveling wave DSP unit；
Step (E), traveling wave DSP unit reads the data in cache element, and judges whether startup separator ranging, wraps
The condition that following two mode meets startup separator ranging is included, as shown in figure 4, (E1) traveling wave DSP unit receives protection DSP unit
Protection signal；(E2) traveling wave DSP unit starts and receives protection DSP unit enabling signal, and positive direction element in area
Action signal；
Step (F), if traveling wave DSP unit startup separator ranging, traveling wave DSP unit records markers this moment, and starts timing
The data that high speed acquisition unit is transmitted are continued caching to caching subelement B and caching subelement C by device 1, and caching subelement B is slow
After the completion of depositing, traveling wave DSP unit caches data conversion storage in above-mentioned caching subelement A and caching subelement B to data storage
Subelement C continues cycling through memory buffers data, and executes step (C) and (H)；If preceding fault localization starting does not return, therefore
Barrier ranging is again started up, and is executed step (G)；
Step (G), if the starting of a preceding fault localization does not return, when fault localization is again started up, traveling wave DSP unit record
Markers this moment starts timer 2, and the data of high speed acquisition unit transmission are deposited simultaneously to caching subelement D and caching subelement A
In, cache unit D caching after the completion of, traveling wave DSP unit by it is above-mentioned be buffered in unit C and caching subelement D in data conversion storage extremely
Data storage, caching subelement A continues cycling through memory buffers data, and executes step (C) and (H)；If fault localization is again
Starting, return step (F) efficiently solve so that starting closely spaced multiple traveling wave fault location data will not be capped
The problem of data caused by frequent starting are capped or lose；
Step (H), markers when traveling wave DSP unit starts according to the fault localization of record are deposited from data storage reading
The traveling wave data of storage carry out fault localization calculating, obtain travelling wave ranging as a result, failure can be carried out by double-end distance measurement method here
Ranging calculates；When the optical-fibre channel of line protection is out of service or two sides sampled data is asynchronous, it is unsatisfactory for both-end
When telemetry condition, then fault localization calculating is carried out by single end distance measurement method, the preferred traveling wave DSP unit reads data and deposits
The traveling wave data of reservoir storage are voltage traveling wave data or current traveling wave data.
In conclusion integrated line protection of the invention, travelling wave ranging method, are sentenced by protection DSP unit starting
It is combined according to the starting of traveling wave DSP unit, effectively reduces the frequent error starting of travelling wave ranging, and by by cache element
It is divided into four caching subelement circulation storage traveling wave ranging datas, and each travelling wave ranging data is transferred to data in time
Memory efficiently solves frequent starting and makes so that starting closely spaced multiple traveling wave fault location data will not be capped
At data it is capped or the problem of lose, and improved in such a way that two kinds of extractions sampling units be sets and DSP protected to sample
Precision, improve measuring distance of transmission line fault precision, while save station in resource, have a good application prospect.
Basic principles and main features and advantage of the invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe originals of the invention
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (6)
1. a kind of integrated line protection, travelling wave ranging method, it is characterised in that: include the following steps,
Step (A), when bringing into operation after device initialization, can linear transform transient current travelling waves and voltage traveling wave exchange plug-in unit
Interior D.C mutual-inductor output signal is sampled through high speed acquisition unit, and sends cache element to；
Step (B), cache element recycle storage in caching subelement A first, and two extractions of sample decimation unit are single
First synchronized sampling work, first by the sampled result of the first extracting unit E, sends protection DSP unit to；
Step (C), if protecting starting after protection DSP unit operation, sample decimation unit receives protection DSP unit enabling signal,
The sampled result of second extracting unit F is transmitted to protection DSP unit and carries out fault logic operation；If protecting DSP unit inactive
Or after starting returns, sample decimation unit will transmit the sampled result of the first extracting unit E, and protection DSP unit is protected with this
Ship sth. under guard calculation；
Step (D), protection DSP unit pass through operation, obtain protecting whether start, whether positive direction element acts and protects in area
The signal whether acted, if being then sent to traveling wave DSP unit；
Step (E), traveling wave DSP unit reads the data in cache element, and judges whether startup separator ranging, including with
Lower two ways meets the condition of startup separator ranging, and (E1) traveling wave DSP unit receives the protection act letter of protection DSP unit
Number；(E2) traveling wave DSP unit starts and receives protection DSP unit enabling signal, and positive direction element movement signal in area；
Step (F), if traveling wave DSP unit startup separator ranging, traveling wave DSP unit records markers this moment, and starts timer 1,
The data that high speed acquisition unit is transmitted are continued caching to have cached to subelement B and caching subelement C, caching subelement B is cached
Data conversion storage in above-mentioned caching subelement A and caching subelement B it is single to be cached son to data storage by Cheng Hou, traveling wave DSP unit
First C continues cycling through memory buffers data, and executes step (C) and (H)；If preceding fault localization starting does not return, failure is surveyed
Away from being again started up, execute step (G)；
Step (G), if the starting of a preceding fault localization does not return, when fault localization is again started up, traveling wave DSP unit is recorded this moment
Markers starts timer 2, and the data of high speed acquisition unit transmission are deposited simultaneously into caching subelement D and caching subelement A,
After the completion of cache unit D caching, traveling wave DSP unit is by the above-mentioned data conversion storage that is buffered in caching subelement C and cells D to data
Memory, caching subelement A continues cycling through memory buffers data, and executes step (C) and (H)；If fault localization is again started up,
Return step (F)；
Step (H), markers when traveling wave DSP unit starts according to the fault localization of record read storage from data storage
Traveling wave data carry out fault localization calculating, obtain travelling wave ranging result.
2. a kind of integrated line protection according to claim 1, travelling wave ranging method, it is characterised in that: step
(A), the cache element includes four cachings subelement A, B, C, D, and each subelement storage address that caches is continuous each other, is held
Amount is consistent.
3. a kind of integrated line protection according to claim 1, travelling wave ranging method, it is characterised in that: step
(B), the sample decimation unit includes the first extracting unit E and the second extracting unit F.
4. a kind of integrated line protection according to claim 3, travelling wave ranging method, it is characterised in that: described
One extracting unit E is used for m sampled point averaged；The second extracting unit F is adopted according to m sampled point extraction
Sample is connected between the two, synchronism output sampled value, wherein m is that the sample frequency of high speed acquisition unit is mono- divided by protection DSP
Rounding value after the sample frequency of member.
5. a kind of integrated line protection according to claim 1, travelling wave ranging method, it is characterised in that: step
(H), traveling wave DSP unit carries out fault localization calculating by double-end distance measurement method；When the optical-fibre channel of line protection is moved back
Operation or two sides sampled data are asynchronous out, when being unsatisfactory for double-end distance measurement method condition, then carry out failure survey by single end distance measurement method
Away from calculating.
6. a kind of integrated line protection according to claim 1, travelling wave ranging method, it is characterised in that: step
(H), it is voltage traveling wave data or current traveling wave data that the traveling wave DSP unit, which reads the traveling wave data of data storage storage,.
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| CN110888016A (en) * | 2019-10-21 | 2020-03-17 | 贵州电网有限责任公司 | Power distribution network traveling wave fault data analysis and processing system based on DSP (digital Signal processor) |
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| US11424613B2 (en) | 2019-03-05 | 2022-08-23 | General Electric Technology Gmbh | Universal traveling-wave-based protection and fault location for power system |
| CN110888014B (en) * | 2019-10-15 | 2022-04-19 | 国电南瑞科技股份有限公司 | Line protection traveling wave distance measurement method and device |
| CN111965485B (en) * | 2020-08-04 | 2023-11-14 | 许继集团有限公司 | Data processing system and method for traveling wave ranging of power transmission line |
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