CN102833119B - Method for synchronously receiving and processing real-time data under dual-network redundancy mechanism - Google Patents
Method for synchronously receiving and processing real-time data under dual-network redundancy mechanism Download PDFInfo
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Abstract
The invention relates to a method for synchronously receiving and processing real-time data under a dual-network redundancy mechanism. According to the real-time data transmission requirements and characteristics of dual-network redundancy mechanism of an automatic system of a transformer substation, a network segment inter-zone time limit dynamic priority selection strategy, a network segment automatic handoff trigger active summoning strategy and an event list cache comparing strategy to realize screening and synchronization of the dual-network real-time uploaded data to guarantee the receiving and processing of the station level and ensure that the station level can timely acquire the effective data without losing, and effectively screen and separate the redundant, repeated and even abnormal uploaded data.
Description
Technical field
The invention belongs to power system automation technology field, under relating to a kind of double-network redundant mechanism, real time data receives the synchronous method processed.
Background technology
The transmission protocol of current transformer station routine is as IEC 60870-5-103 stipulations, its device end (substation) is supported to send variable condition data and event class data initiatively, timing cycle send whole status data and supports that station level (main website) always calls the functions such as whole status datas together; When double-network redundant communication configures, device end (substation) is usually all set up TCP with station level (main website) respectively and is connected on two network segments, send data also to be connected by above-mentioned two TCP respectively on all to send and (main website), namely communication reliability is ensured by communication link redundancy, data redundancy, to prevent from extremely causing loss of data because a certain network segment connects, controlling to lose efficacy.And on the other hand, above-mentioned mode of operation is received process also to the real time data of station level and brings following problem: 1, under nominal situation, send redundant data owing to have received in double, if do not add screening, follow-up data process and the unnecessary double increase of transport overhead can be caused, 2, as excessive in postponed between device self transmission task under some extreme unusual service condition, there is fierce access conflict in the shared communication network segment (as Ethernet) of conventional bus and rollback re-transmission causes transmission lag excessive, network switch forward delay when big data quantity is excessive etc., send data markers asynchronous by likely making station level from the same device that two network segments receive, even there is front-back staggered phenomenon, this depends on for station level and send the Processing tasks of data sequencing (conjugating information accurately as generated according to real time status information) will produce very large interference, even cause its dysfunction.
Summary of the invention
The object of the invention is the problem receiving process in order to solve above electric substation automation system pair net real time data, under proposing a kind of novel double-network redundant mechanism, real time data receives the synchronous method processed.
Technical scheme of the present invention is:
A, for real-time status data such as remote signalling, remote measurement, distant arteries and veins, adopt between the network segment and choose to realize choosing of valid data with time limit dynamic priority, under nominal situation, station level can receive from two normal communication network segments the real-time status data that device send simultaneously, now a normal communication network segment first can be set to limit priority in the starting stage by receiving processing module at random, only to this network segment sending real-time status data process, and to other network segments giving real-time status data put aside, directly ignore; There is TCP disconnecting when the reception process network segment being in limit priority or countlessly in presetting time limit T1 to send on successfully, then can be judged as that this network segment communicating is abnormal, reducing its priority transfers to for subsequent use, another normal communication network segment be promoted to limit priority simultaneously and process the real-time status data that it send, thus realizing choosing band time limit dynamic priority device sending real-time status data between the network segment;
B, trigger initiatively calling when the process of real-time status data receiver being automatically switched when between the network segment with the ageing and integrality of assurance device real-time status data.When there is communication abnormality in the reception process network segment being in limit priority, because the device real-time status data that other network segments send are left in the basket, to cause station level cannot the real-time status data of refreshing apparatus in time, this state is duration T more than 1 probably, thus automatically switched at the new network segment and should carry out data in the very first time to device after limit priority takes over real-time status data processing and always call, to ensure the ageing and integrality of current real-time status data;
C, send data in the event class such as alarm event, action report of device, station level receiving processing module maintains one according to the event information buffer queue sorted before and after markers to each device, do not need to consider priority to each communication network segment of same device, when receiving the event class data that device send, first in event information buffer queue, comparison is performed from back to front by markers, determine same event whether record, have, illustrate and be successfully processed, directly ignore; Then data processing is not performed to it, and added to event information buffer queue and use for follow-up comparison, by said process, achieve the ordered process and the Effective selection that device are sent to event class data in real time.
The further prioritization scheme of the present invention is, station level receiving processing module utilizes existing event information buffer queue, retransmits report, case mechanism in conjunction with powering on of possessing of cell device, also can implement device power-down rebooting and function that event, report record are not lost.
The invention has the beneficial effects as follows: the inventive method is for the technical characterstic of transformer station's double-network redundant communication and data characteristics, take optimization process strategy targetedly, processing logic is succinct, efficiently, operation expense is little, the communication server in electric substation automation system double-network redundant allocation plan can be directly applied to, the real time data of communication processor and local monitoring background system receives the realization of process, the optimization receiving process for station level double-network redundant communication data provides a kind of efficient, practical method, can ensure that useful data obtains in time, do not lose and can effectively screen out, it is unnecessary to isolate, repeat even abnormal data, therefore this technical method at station level as the communication server, be with a wide range of applications in the product developments such as communication processor and monitoring background system.
Accompanying drawing explanation
Fig. 1 is with time limit dynamic priority to choose treatment state figure between the network segment of the present invention.
Fig. 2 is event queue buffer memory comparison process chart of the present invention.
Embodiment
1, for real-time status data such as remote signalling, remote measurement, distant arteries and veins, adopt between the network segment and choose to realize choosing of valid data with time limit dynamic priority.With reference to accompanying drawing 1, under nominal situation, station level can receive from two normal communication network segments the real-time status data that device send simultaneously, now a normal communication network segment first can be set to limit priority in the starting stage by receiving processing module at random, only to this network segment sending real-time status data process, and to other network segments giving real-time status data put aside, directly ignore; When the reception process network segment being in limit priority occurs TCP disconnecting or countless in presetting time limit T1 (presetting time limit T1 can determine according to the real time data refresh interval T2 in actual device normal communication situation according to sending on successfully, T1=n* T2, n gets 1.5 ~ 3), then can be judged as that this network segment communicating is abnormal, reducing its priority transfers to for subsequent use, another normal communication network segment be promoted to limit priority simultaneously and process the real-time status data that it send, thus realizing choosing band time limit dynamic priority device sending real-time status data between the network segment.
Initiatively calling is triggered with the ageing and integrality of assurance device real-time status data when 2, the process of real-time status data receiver being automatically switched when between the network segment.When there is communication abnormality in the reception process network segment being in limit priority, because the device real-time status data that other network segments send are left in the basket, to cause station level cannot the real-time status data of refreshing apparatus in time, this state is duration T more than 1 probably, thus automatically switched at the new network segment and should carry out data in the very first time to device after limit priority takes over real-time status data processing and always call, to ensure the ageing and integrality of current real-time status data.
3, send data in the event class such as alarm event, action report of device, station level receiving processing module maintains one according to the event information buffer queue sorted before and after markers (the maximum event information number of this buffer queue can be determined according to the maximum holding time of presetting or memory capacity size) to each device.With reference to accompanying drawing 2, do not need to consider priority to each communication network segment of same device, when receiving the event class data that device send, first in event information buffer queue, performing comparison from back to front by markers, determining same event whether record.Have, illustrate and be successfully processed, directly ignore; Then data processing is not performed to it, and added to event information buffer queue and use for follow-up comparison.By said process, achieve the ordered process and the Effective selection that device are sent to event class data in real time.In addition, station level receiving processing module utilizes existing event information buffer queue, retransmits report, case mechanism in conjunction with powering on of possessing of cell device, also can implement device power-down rebooting and function that event, report record are not lost.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should be appreciated that, the present invention is not restricted to the described embodiments, and all technical schemes taking the scheme of equivalent replacement or equivalent transformation to obtain, all drop in protection scope of the present invention.What describe in above-described embodiment and specification just illustrates principle of the present invention simultaneously; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and application claims protection range is defined by its equivalent of appending claims.
Claims (2)
1. under double-network redundant mechanism, real time data receives a method for synchronous process, it is characterized in that:
Steps A, for remote signalling, remote measurement, distant arteries and veins real-time status data, adopt between the network segment and choose to realize choosing of valid data with time limit dynamic priority, under nominal situation, station level can receive from two normal communication network segments the real-time status data that device send simultaneously, now a normal communication network segment first can be set to limit priority in the starting stage by receiving processing module at random, only to this network segment sending real-time status data process, and to other network segments giving real-time status data put aside, directly ignore; There is TCP disconnecting when the reception process network segment being in limit priority or countlessly in presetting time limit T1 to send on successfully, then can be judged as that this network segment communicating is abnormal, reducing its priority transfers to for subsequent use, another normal communication network segment be promoted to limit priority simultaneously and process the real-time status data that it send, thus realizing choosing band time limit dynamic priority device sending real-time status data between the network segment;
Step B, initiatively calling is triggered with the ageing and integrality of assurance device real-time status data: when communication abnormality appears in the reception process network segment being in limit priority when the process of real-time status data receiver being automatically switched when between the network segment, because the device real-time status data that other network segments send are left in the basket, to cause station level cannot the real-time status data of refreshing apparatus in time, this more than state duration T1, thus automatically switched at the new network segment and should carry out data in the very first time to device after limit priority takes over real-time status data processing and always call, to ensure the ageing and integrality of current real-time status data,
Step C, send data in the alarm event of device, action report event class, station level receiving processing module maintains one according to the event information buffer queue sorted before and after markers to each device, do not need to consider priority to each communication network segment of same device, when receiving the event class data that device send, first in event information buffer queue, comparison is performed from back to front by markers, determine same event whether record, have, illustrate and be successfully processed, directly ignore; Then data processing is not performed to it, and added to event information buffer queue and use for follow-up comparison, by said process, achieve the ordered process and the Effective selection that device are sent to event class data in real time.
2. under double-network redundant mechanism according to claim 1, real time data receives the method for synchronous process, it is characterized in that: in step C, station level receiving processing module utilizes existing event information buffer queue, report, case mechanism is retransmitted in conjunction with powering on of possessing of cell device, also can implement device power-down rebooting and function that event, report record are not lost.
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| CN103414694B (en) * | 2013-07-21 | 2016-05-18 | 华北电力大学（保定） | The communication service mapping of monitoring system of electric substation and method for packing |
| CN103944787B (en) * | 2014-04-30 | 2015-09-30 | 国家电网公司 | The two net pattern handoff testing method of intelligent substation station level |
| CN104617664B (en) * | 2014-06-24 | 2017-01-11 | 许继电气股份有限公司 | Method for switching double intelligent terminal device remote communication quantity in intelligent substation |
| CN104269935B (en) * | 2014-10-23 | 2016-07-27 | 南京国电南自轨道交通工程有限公司 | Pressure looped network protection system interval layer network-building method in a kind of novel subway |
| CN105449855B (en) * | 2015-11-25 | 2018-01-09 | 国网浙江省电力公司绍兴供电公司 | A kind of intelligent grid allotment automated system real time data insertion method |
| CN109995423A (en) * | 2019-03-12 | 2019-07-09 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of FC-AE-ASM parallel redundant system and its data processing method |
| CN111355648B (en) * | 2020-02-18 | 2022-02-08 | 南京国电南自轨道交通工程有限公司 | RTU dual-computer redundancy acquisition system based on synchronous time window |
| CN112099769B (en) * | 2020-09-15 | 2022-05-03 | 电子科技大学 | Software radar device with unified data transmission interface |
| CN114124672B (en) * | 2021-10-12 | 2024-01-23 | 南方电网数字电网研究院有限公司 | Process layer double-network sampling data processing method and protection device for intelligent substation |
| CN116340432B (en) * | 2023-05-29 | 2023-08-04 | 武汉华瑞测智能技术有限公司 | Database synchronization method, equipment and medium based on power data |
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