CN104377820A - Method for increasing state estimation data percent of pass of substation collection end under IEC103 communication - Google Patents
Method for increasing state estimation data percent of pass of substation collection end under IEC103 communication Download PDFInfo
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- CN104377820A CN104377820A CN201410650600.2A CN201410650600A CN104377820A CN 104377820 A CN104377820 A CN 104377820A CN 201410650600 A CN201410650600 A CN 201410650600A CN 104377820 A CN104377820 A CN 104377820A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
Abstract
The invention discloses a method for increasing the state estimation data percent of pass of a substation collection end under IEC103 communication. The method is characterized by including the following steps that first, data are acquired, wherein a measuring and control device performs calculation and storage according to round-hundred milliseconds having been subjected to accurate time hack after acquisition is completed, and in other words, the measuring and control device performs calculation and storage on 0ms, 100ms, 200ms, 300ms...900ms; second, data are transmitted, wherein when the measuring and control device sends telemetering and telecommand information, current time information is increased through standby bytes in stipulated messages, and the following rules include the content that when codes are transmitted on Am Bs Cms data, standard information occupies 16 Bit data, wherein A is set as data from 10th Bit to 15th Bit, B is set as data from 4th Bit to 9th Bit, and B/100 is set as data from 0Bit to 3rd Bit. The method has the advantages that the time sections of measured data of a substation are unified on a data acquisition source, and the time fracture surfaces at a data receiving end are unified in the data transmission process.
Description
Technical field
The present invention relates to a kind of method improving transformer station's collection terminal Data of State Estimation qualification rate under IEC103 communication, belong to electrical technology field.
Background technology
State estimation is the basic software in power grid control in EMS, and it is the real-time computer program and the algorithm that available redundant information are changed into electric power system current state estimated value.State estimation result carries out follow-up work (as quiet stable state safety analysis, Dispatcher Power Flow and optimal load flow etc.) requisite basis accurately, simultaneously can Timeliness coverage electrical network real-time measurement, passage, topology, parameter exception.State estimation qualification rate effectively can assess the accuracy of factory station data, for automation operator on duty Detection and identification bad data, supplementary measuring point in shortage provide important evidence, can improve automation operator on duty operating efficiency.And end Data of State Estimation qualification rate situation of standing at present allows of no optimist, State Grid Corporation of China's demand of technical standard can not be met completely.
Wherein during remote action data, the different problem of discontinuity surface is one of major reason causing qualification rate not meet the demands, at present each harvester carries out according to each self-clock collections and calculates, send simultaneously communication manager be also according to calling order moment or measuring amount change moment at random on give.Data in current real-time data storehouse are only forwarded to scheduling according to transmitting upper sending during dispatching patcher by communication manager, do not carry out correcting data error and markers alignment, cause non-same time discontinuity surface good bad data all send to scheduling station, have a strong impact on Data of State Estimation qualification rate.Just because of the inconsistency of discontinuity surface time this, cause single measure and control device certainty of measurement in transformer station all can reach requirement, but full station data error can not meet the demands.
Current wall measure and control device adopts the mode of carrying out filtering sampling calculating according to the interrupt interval of self flush bonding processor mostly, after data are converted to effective value, be transferred to communication manager.Mainly contain two kinds of modes at present:
(1) the related data poll that communication manager carries out single measure and control device according to interval of fixing time always is called, and measure and control device replys related data one by one.This pattern is mainly used in and adopts IEC103 or enterprises bus as the transformer station of the station level communication protocols such as CAN, MODBUS, or in the first connection procedure of IEC61850 communication protocol.
(2) measure and control device monitor change data time initiatively on send associated change data, communication manager is passive accepts measurement data, and this pattern is mainly used in the transformer station of the station level communication protocol adopting IEC61850 and part IEC103 stipulations.
In above-mentioned two situations, when even if full station is furnished with GPS couple system or other accurate pair time system, remote measure and communication data are not with markers substantially, and in IEC61850, markers is also only device delivery time communication processing unit self markers, and non-measured collection calculates moment markers.
The subject matter of current collection forward mode
According to above-mentioned station end data acquisition process send mode, although on the one hand measure and control device can real-time data collection, due to data transfer mode, send to the data of communication manager cannot realize all intervals and send the same time profile data of data acquisition.In addition on the one hand, do not comprise sampling instant information due in the data message that sends at measure and control device, communication manager cannot carry out synchronization data to markers process to data, also just causes delivering to data dispatching and cannot realize same time section process.
In this case, following problem is mainly contained:
1. when Substation Station control layer network occurs unstable; part measure and control device Refresh Data is often there will be frequent at communication management pusher side; indivedual measure and control device data do not refresh for a long time or exceed the data of level second cannot refresh phenomenon; communication manager which data cannot be distinguished do not refresh for a long time in this case; can only send according on available data database data, the defective phenomenon of Data of State Estimation instantaneity can be caused.
Even if 2. when Substation Station control layer network is all right, due to all measure and control devices and the same time profile data of unrealized transmission, cause the data sampling time difference sending to communication manager can from about 20ms-1s, when measured interval heavy load, there will be larger Data of State Estimation error when there is load fluctuation, telemetry is defective even there is the load unbalanced phenomenon in long-term whole station.
In document " delay inequality of measurement amount is on the impact of state estimation and countermeasure thereof " (Automation of Electric Systems, 28th volume the 21st phase in 2004 the 12nd page) in due to time the discontinuity surface inconsistent state estimation error caused propose the method for carrying out software compensation, because each transformer station's communication state differs greatly and the problem of real-time change, cause its practicality not high.Also be adopt the different compensation method of separate sources data acquisition in document " metric data time difference compensation state estimation method " (Automation of Electric Systems, 2009 the 33rd volume the 8th phase the 44th page), realize difficulty equally larger.
Summary of the invention
For solving the deficiencies in the prior art, the object of the present invention is to provide a kind of method improving transformer station's collection terminal Data of State Estimation qualification rate under IEC103 communication, can when the source of data acquisition realizes transformer station's measurement data discontinuity surface sameization and time discontinuity surface sameization that realize in data transmission procedure at data receiver.
In order to realize above-mentioned target, the present invention adopts following technical scheme:
Under IEC103 communication, improve the method for transformer station's collection terminal Data of State Estimation qualification rate, it is characterized in that, comprise the steps:
1) data acquisition: measure and control device gather after according to accurate pair time after whole hundred milliseconds calculate and store, namely carry out calculating and storing at every 0ms, 100ms, 200ms, 300ms ..., 900ms.
2) data transmission procedure: measure and control device is when sending remote measure and communication information, spare bytes in stipulations message is utilized to increase current time information, the rule followed is as follows: in Am Bs Cms data, send coding time scale information to take 16 Bit data, wherein A is set to the 15th-10 bit data, B is set to the 9th-4 bit data, and C/100 is set to the 3rd-0 bit data.
The aforesaid method improving transformer station's collection terminal Data of State Estimation qualification rate under IEC103 communication, it is characterized in that, described step 2) in each on send and only need remote measurement length byte VQS in former message to add 1, after original remote measurement measured value, increase 2 Byte time scale informations simultaneously; When sending change remote measurement or displacement remote signalling, same processing time scales information in upper literary composition of delivering newspaper.
The beneficial effect that the present invention reaches: discontinuity surface sameization when the source of data acquisition realizes transformer station's measurement data, and in data transmission procedure, realize time discontinuity surface sameization at data receiver.
Embodiment
The invention will be further described below.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
A kind of method improving transformer station's collection terminal Data of State Estimation qualification rate under IEC103 communication that the present invention relates to, solves data time section consistency problem from data acquisition root, comprises the steps:
1) data acquisition: measure and control device gather after according to accurate pair time after whole hundred milliseconds calculate and store, namely carry out calculating and storing at every 0ms, 100ms, 200ms, 300ms ..., 900ms.
2) data transmission procedure: in IEC103 communication protocol, communication manager always call together or device initiatively in carry information situation, measure and control device is when sending remote measure and communication information, spare bytes in stipulations message is utilized to increase current time information, the rule followed is as follows: in Am Bs Cms data, send coding time scale information to take one 16 Bi t data, wherein A is set to the 15th-10 bit data, and B is set to the 9th-4 bit data, and C/100 is set to the 3rd-0 bit data.Such as 4h 10s 300ms time scale information is encoded to 16 ary codes 0X10A3, give tacit consent to each interval time error when current transformer station has had accurate pair substantially or pulse per second (PPS) pair time technical conditions under can not be greater than 1 hour, therefore do not increase hour data in time scale information.Send on this processing scheme is each and only need remote measurement length byte VQS in former message to add 1, after original remote measurement measured value, increase by 2 Byte time scale informations simultaneously; When sending change remote measurement or displacement remote signalling, same processing time scales information in upper literary composition of delivering newspaper.
Like this at the upper time profile data sent in data when comprising through accurate pair, even if can ensure that diverse location interval measuring and control data transmitting time is variant, the data of discontinuity surface time same also can be ensured to send to communication manager.
Next IEC103 to send remote measurement message simply illustrate:
Table 1 IEC103 stipulations amendment mode example
| Original message | Message after amendment | |
| ASDU type identification | 50 | 50 |
| Remote measurement amount number (VSQ) | 10 | 11 |
| COT | 2 | 2 |
| ASDU_ADDR | 4 | 4 |
| FUN | 90 | 90 |
| INF | 1 | 1 |
| Measured value 1 | 0x0123 | 0x0123 |
| Measured value 2 | 0x0121 | 0x0121 |
| ... | ... | ... |
| Measured value 10 | 0x0134 | 0x0134 |
| Increase markers byte | Nothing | 0x10A3 |
Original message utilizes ASDU50 to carry out sequential delivery remote measurement value, originally transmits according to upper table secondary series data format, and transmits after amendment according to the 3rd column data form.Like this at the upper time profile data sent in data when comprising through accurate pair, even if can ensure that diverse location interval measuring and control data transmitting time is variant, the data of discontinuity surface time same also can be ensured to send to communication manager.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (2)
1. under IEC103 communication, improve the method for transformer station's collection terminal Data of State Estimation qualification rate, it is characterized in that, comprise the steps:
1) data acquisition: measure and control device gather after according to accurate pair time after whole hundred milliseconds calculate and store, namely carry out calculating and storing at every 0ms, 100ms, 200ms, 300ms ..., 900ms.
2) data transmission procedure: measure and control device is when sending remote measure and communication information, spare bytes in stipulations message is utilized to increase current time information, the rule followed is as follows: in Am Bs Cms data, send coding time scale information to take one 16 Bi t data, wherein A is set to the 15th-10 bit data, B is set to the 9th-4 bit data, and C/100 is set to the 3rd-0 bit data.
2. the method improving transformer station's collection terminal Data of State Estimation qualification rate under IEC103 communication according to claim 1, it is characterized in that, described step 2) in each on send and only need remote measurement length byte VQS in former message to add 1, after original remote measurement measured value, increase 2 Byte time scale informations simultaneously; When sending change remote measurement or displacement remote signalling, same processing time scales information in upper literary composition of delivering newspaper.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111680037A (en) * | 2020-05-14 | 2020-09-18 | 许继集团有限公司 | Dynamic data time scale obtaining method and device |
| CN115986944A (en) * | 2023-03-10 | 2023-04-18 | 广东正超电气有限公司 | Method for transmitting on-line monitoring and environment monitoring data of distribution ring network cabinet through DTU |
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| CN201345663Y (en) * | 2008-10-07 | 2009-11-11 | 上海思南电力通信有限公司 | Operation and management information system for relay protection |
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| CN111680037B (en) * | 2020-05-14 | 2023-08-08 | 许继集团有限公司 | Dynamic data time scale acquisition method and device |
| CN115986944A (en) * | 2023-03-10 | 2023-04-18 | 广东正超电气有限公司 | Method for transmitting on-line monitoring and environment monitoring data of distribution ring network cabinet through DTU |
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