CN101296062B - Double-channel data transmission method in optical fiber longitudinal differential protection - Google Patents

Double-channel data transmission method in optical fiber longitudinal differential protection Download PDF

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Publication number
CN101296062B
CN101296062B CN2007100543224A CN200710054322A CN101296062B CN 101296062 B CN101296062 B CN 101296062B CN 2007100543224 A CN2007100543224 A CN 2007100543224A CN 200710054322 A CN200710054322 A CN 200710054322A CN 101296062 B CN101296062 B CN 101296062B
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channel
data
passage
binary channels
double
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CN2007100543224A
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Chinese (zh)
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CN101296062A (en
Inventor
路光辉
刘军
商建华
封晓东
贺要锋
桑仲庆
吴双惠
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许继集团有限公司
许继电气股份有限公司
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Publication of CN101296062A publication Critical patent/CN101296062A/en
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Abstract

The invention relates to a double-channel data transmitting method in optical fiber differential protection. The method is characterized in that: when only one channel is functioning, a protection device carries out synchronous adjustment at the time of sampling according to the data of the functioning channel; when two channels are functioning and power is on, the channel (confirmed for 3 times) with less time delay is preferably chosen as the synchronous adjustment channel; when the two channels are functioning and the time delay of the two channels only differs a little (less than 0.6ms), the channel A is chosen as the synchronous adjustment channel; when the synchronous adjustment channel is disabled, the other normal functioning channel is chosen as the synchronous adjustment channel. When the time delay of the synchronous channel is larger than the time delay of the other channel (the difference is lager than 0.3ms) and the difference continues for 10s, the other channel is chosen as the synchronous adjustment channel.

Description

Double-channel data transmission method in the optical-fiber longitudinal difference protection

Technical field

The present invention relates to electricity field, relate in particular to and in the high-voltage fence optical fiber differential protective, pass through the method that binary channels increases the reliability of longitudinal difference protection.

Background technology

The transmission line current differential protection need pass mass data information to opposite side from circuit one side, when error of transmission takes place, because the protection real-time requires and the restriction of channel capacity, is difficult to the reconstruction of the information that realizes.This just means at a frame length and reaches in hundreds of the information if 1 or above error code occur that whole frame information will be dropped.If the error code occurrence frequency is not high, little to the protective value influence, but if the frequency of makeing mistakes is very high, will Blocking Differential Protection.It all is out of use that one bit-errors or multi-bit error this frame concerning protecting is arranged in one frame information, and reason is the protection real-time is required very high, both not free information frame repeating transmission to makeing mistakes, and ability also useless is carried out the data recovery, have to abandon Frame.

The reliability of high voltage power transmisson system protective relaying device is the assurance of power system safety and stability operation.The reliability of equipment for protecting optical fibre longitudinal difference depends on the reliability of protecting passage largely, and the passage redundancy is to improve the effective means of channel reliability, and therefore, the more and more binary channels modes that adopt of longitudinal difference protection improve the protection reliability.

The binary channels mode of differential protection is a master channel with a passage often at present, and another passage is an alternate channel, and master channel sends protected data, alternate channel sendaisle monitoring data.When master channel is unusual, alternate channel just often switches to alternate channel transmission data, thereby guarantees that the differential protection passage is normal.

There is following shortcoming with upper type: the one, switching time is long, and utilizing alternate channel to set up the new data connection from the master channel malfunction and failure to protection needs the long period, thereby passage switching main protection is longer disengaging time.The 2nd, the quality of data of channel transfer does not have too big raising, and reason is not reach when switching threshold when the reduction of master channel communication quality, still utilizes master channel to carry out data communication, and it is bigger that protected data is influenced by intermittent error code.

Summary of the invention

To the deficiency of above-mentioned prior art, task of the present invention is to provide the double-channel data transmission method in a kind of optical-fiber longitudinal difference protection, improves communication reliability and channel quality.

For accomplishing above-mentioned task; Technical scheme of the present invention is: the double-channel data transmission method in a kind of optical-fiber longitudinal difference protection; This method is between binary channels data communication module and protection computing module, binary channels data selection function module to be set; Binary channels data selection function module is independent of the protection computing module, for the protection computing module provides reliable communication data, wherein

Two passages work alone, receive and dispatch simultaneously protected data, and each passage has independently channel quality monitoring function, and two passages are regardless of the principal and subordinate, and the status is identical, with parallel mode work;

Two channel datas of binary channels data selection function module select to have adaptation function; Be adaptive to single, double passage mode of operation; And the binary channels data select to adopt seamless data to switch; Certain frame data in the reception data field of a passage lose or verification is staggered the time, and data select module to get the corresponding frame data in the reception data field of another passage automatically, guarantee to protect the real-time of calculating;

Simultaneously, binary channels data selection function module:

The short channel data of automatic selector channel time-delay when differential calculating;

When detecting a channel data error code, select another channel data automatically;

, channel data selects another channel data when losing automatically.

When having only a passage job, protective device carries out the synchronous adjustment of sampling instant based on the service aisle data of operation.

Under the situation of binary channels work, the passage of preferential selector channel short time delay is as adjusting passage synchronously when powering on.

Under the situation of binary channels work, if two channel time delay less than 0.6ms, binary channels data selection function module is given tacit consent to one of them passage A all the time and is synchronous adjustment passage.

After passage A lost efficacy, select another channel B in proper working order as adjusting passage synchronously.

When the synchronous adjustment passage A time delay of this acquiescence greater than another channel B time delay, difference is greater than 0.3ms and lasting 1s when above, selects another channel B as adjustment passage synchronously.

The present invention adopts the binary channels data to select module, accomplishes the binary channels data automatically through this functional module and selects, and realizes the seamless handover function of protected data.This binary channels data selection algorithm has following characteristics: the short channel data of automatic selector channel time-delay during differential calculating; Automatically select another channel data when detecting a channel data error code; When losing, channel data selects another channel data automatically; Two channel data status are identical.

The reliability of circuit longitudinal differential protection depends on the reliability of optical-fibre channel, and along with enriching of channel resource, binary channels inserts the protective device technology becomes the effective measure that improves the protection reliability.The present invention just is being based on the binary channels data and select is proposing one conscientiously, binary channels inserts the protective device design efficiently.These binary channels data select module can be independent of the protection calculation procedure; And the information transparency that can adaptively offside be protected is mapped in this side protective device; This mapping method biggest advantage is the protected data of seamless preferred two passages, greatly improves the protection reliability.

Binary channels data selection function module is independent of the protection calculation procedure, and it is between binary channels data communication module and protection computing module, for the protection computing module provides reliable communication data.

Binary channels data selection function module is fully transparent as far as the protection computing module, and what the protection calculation procedure was seen is merely through preferred offside data field.

What binary channels data selection function module was accomplished is the seamless selections of binary channels data, if i.e. two equal operate as normal of passage, binary channels data selection function module selects to be beneficial to the short data of communication channel delay that protection is calculated automatically; When a passage error code occurred and causes certain frame data to lose efficacy, binary channels data selection function module can be taken out corresponding Frame from another passage and supplied protection to calculate to use, and channel quality greatly improves.

Description of drawings

Fig. 1 is a binary channels data selection logic flow chart of the present invention;

Fig. 2 is a service system pie graph of the present invention.

Embodiment

Following mask body is narrated detailed content of the present invention:

Double-channel data transmission method in the optical-fiber longitudinal difference protection of the present invention; This method is between binary channels data communication module and protection computing module, binary channels data selection function module to be set, and binary channels data selection function module is independent of the protection computing module, for the protection computing module provides reliable communication data; Wherein, Two passages work alone, receive and dispatch simultaneously protected data, and each passage has independently channel quality monitoring function, and two passages are regardless of the principal and subordinate; The status is identical, with parallel mode work; Two channel datas of binary channels data selection function module select to have adaptation function; Be adaptive to single, double passage mode of operation; And the binary channels data select to adopt seamless data to switch; Certain frame data in the reception data field of a passage lose or verification is staggered the time, and data select module to get the corresponding frame data in the reception data field of another passage automatically, guarantee to protect the real-time of calculating; Simultaneously, binary channels data selection function module: the short channel data of automatic selector channel time-delay when differential calculating; When detecting a channel data error code, select another channel data automatically; , channel data selects another channel data when losing automatically.When having only a passage job, protective device carries out the synchronous adjustment of sampling instant based on the service aisle data of operation.Under the situation of binary channels work, the passage of preferential selector channel short time delay is as adjusting passage synchronously when powering on.Under the situation of binary channels work, if two channel time delay less than 0.6ms (preferred 0.5ms), binary channels data selection function module is given tacit consent to one of them passage A all the time and is adjustment passage synchronously.When the synchronous adjustment passage A time delay of this acquiescence greater than another channel B time delay, difference is during greater than 0.3ms (preferred 0.5ms) and lasting 1s above (preferred 10ms), selects another channel B as adjustment passage synchronously.

Among the present invention, designated lane refers to directly connect through the special optic fibre fibre core, because without intermediate equipment, so propagation delay time is little, the high communication quality, shortcoming is to take the fibre core resource.Under the situation that binary channels all inserts,, adjust passage synchronously as acquiescence with designated lane if any designated lane.After designated lane interrupts or lost efficacy, just select for use another passage as adjusting passage synchronously.Designated lane refers to return to normal condition when the designated lane communication function by interruption or failure state.

Under the situation that on-the-spot binary channels inserts, possible two passages (1) be designated lane, also possibly be (2) multiplex channel, also possible (3) A channel designated lane, B channel multiplexing passage, (4) A channel multiplex channel, B passage designated lane.After powering on, protective device in the initialization procedure, under (1), (2) situation, can be the adjustment passage by automatic default channel A; Under (3) situation, passage A under (4) situation, though passage A is the acquiescence synchronizing channel, can time-delay short B passage in selector channel be that designated lane is a synchronizing channel for the acquiescence synchronizing channel.

Claims (6)

1. the double-channel data transmission method in the optical-fiber longitudinal difference protection; It is characterized in that: this method is that binary channels data communication module and the protection in protective device is provided with binary channels data selection function module between the computing module; Binary channels data selection function module is independent of the protection computing module; For the protection computing module provides reliable communication data, wherein
Two passages work alone, receive and dispatch simultaneously protected data, and each passage has independently channel quality monitoring function, and two passages are regardless of the principal and subordinate, and the status is identical, with parallel mode work;
Two channel datas of binary channels data selection function module select to have adaptation function; Be adaptive to single, double passage mode of operation; And the binary channels data select to adopt seamless data to switch; Certain frame data in the reception data field of a passage lose or verification is staggered the time, and data select module to get the corresponding frame data in the reception data field of another passage automatically, guarantee to protect the real-time of calculating;
Simultaneously, binary channels data selection function module:
The short channel data of automatic selector channel time-delay when differential calculating;
When detecting a channel data error code, select another channel data automatically;
, channel data selects another channel data when losing automatically.
2. double-channel data transmission method according to claim 1 is characterized in that: when having only a passage job, protective device carries out the synchronous adjustment of sampling instant according to the service aisle data of operation.
3. double-channel data transmission method according to claim 1 is characterized in that: under the situation of binary channels work, the passage of preferential selector channel short time delay is as adjusting passage synchronously when powering on.
4. according to claim 1 or 3 described double-channel data transmission methods, it is characterized in that: under the situation of binary channels work, if two channel time delay less than 0.6ms, binary channels data selection function module is given tacit consent to one of them passage A all the time and is synchronous adjustment passage.
5. double-channel data transmission method according to claim 4 is characterized in that: after passage A lost efficacy, select another channel B in proper working order as adjusting passage synchronously.
6. according to claim 1 or 3 described double-channel data transmission methods, it is characterized in that: when the synchronous adjustment passage A time delay of this acquiescence greater than another channel B time delay, difference is greater than 0.3ms and lasting 1s when above, selects another channel B as adjustment passage synchronously.
CN2007100543224A 2007-04-28 2007-04-28 Double-channel data transmission method in optical fiber longitudinal differential protection CN101296062B (en)

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CN101825668B (en) * 2009-03-06 2012-10-10 华北电力科学研究院有限责任公司 Fault detection device and method of relay protection channel
CN101825667B (en) * 2009-03-06 2013-06-26 华北电力科学研究院有限责任公司 Failure detecting equipment of power communication transmission channel, failure detecting system and method
CN102158306B (en) * 2010-12-23 2013-09-18 国网电力科学研究院 Method for carrying out seamless handover between longitudinal differential protection and pilot protection under single channel
CN102694682A (en) * 2012-05-18 2012-09-26 邢台供电公司 Method for guaranteeing reliability in user data transmission
CN102724289B (en) * 2012-05-22 2014-04-23 许继电气股份有限公司 Data synchronization method of remote control channel
RU2528089C2 (en) * 2012-11-15 2014-09-10 Открытое акционерное общество "Головное системное конструкторское бюро Концерна ПВО "Алмаз-Антей" имени академика А.А. Расплетина" (ОАО "ГСКБ "Алмаз-Антей") Device for synchronous reception of binary information over backup communication channels
CN104393914B (en) * 2014-11-10 2017-01-25 国家电网公司 A multiplex route recovering method for an optical fiber differential protection device
CN104538942A (en) * 2014-12-23 2015-04-22 国电南瑞科技股份有限公司 Dual-optical-fiber under-channel longitudinal differential protection and pilot protection integrating method
CN105680427B (en) * 2016-03-16 2019-02-22 华中电网有限公司 The transmission line of electricity optical fibre differential protection method more adapted to
CN106452668B (en) * 2016-08-31 2020-08-11 许继集团有限公司 FPGA-based IED dual-channel data transmission and dual-logic verification system and method
CN107331185B (en) * 2017-08-16 2019-12-06 青岛海信网络科技股份有限公司 Abnormal state processing method of traffic signal lamp machine, host and slave
CN109638792B (en) * 2018-11-20 2020-06-09 四川电力设计咨询有限责任公司 Circuit pilot protection device

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