CN103559379A - Data source validity judging method and double-data-source selecting method - Google Patents
Data source validity judging method and double-data-source selecting method Download PDFInfo
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Abstract
The invention relates to a data source validity judging method and a double-data-source selecting method and belongs to the technical field of data processing of an intelligent substation. By integrating health status of a double-data-source device and communication status and validity of data sources as credibility of the data sources, the data source with higher credibility is selected as a main data source, and when the main data source is in fault and communication is interrupted, the other data source can be switched on during overhauling of the main data source. When invalid data are transmitted to the main data source, the data source with normal data can be switched on in time, rate in invalid data transmission is decreased, and data accuracy is improved.
Description
Technical field
The present invention relates to a kind of data source validity determination methods and dual data source system of selection, belong to intelligent substation technical field of data processing.
Background technology
For the reliable and stable operation of electrical network, the interior data collector from process layer of intelligent substation is all dual configuration to the protection observing and controlling of wall, has so just occurred the concept of dual data source.Dual data source refers to for same measuring point and has 2 independently Data Sources.For example; the double measurement and control in the situation that of voltage levels protection, measurement and control integration device; telemechanical apparatus is communicated by letter with 2 measure and control devices simultaneously; access the data that two measure and control devices gather; the value that enters the unified measuring point of telemechanical apparatus at synchronization so just has two, has just occurred in this case the problem that data source is selected.
Current data source selection scheme is: when two table apparatus all normally move, select one of them device for data source, device because break down, communication disruption or when maintenance be switched to another device with regard to integral body, whether selection scheme gives no thought to the data of sending on device effective.The problem that such data source selection method exists is: because process layer data acquisition equipment fault, basic automatization equipment such as the reasons such as transmitter is aging cause, deliver to the data of wall measuring equipment when invalid from process from, wall measuring equipment is still in normal operation, do not meet data source switching condition, so just will in invalid data, deliver to scheduling.Namely when two data source apparatus are all healthy, and when communication is all normal, and primary data source is invalid because other factors cause, now, according to available data source selection scheme, system can be given tacit consent on primary data source is carried out and send, thereby cause uploaded data, is invalid data, may cause scheduling to make erroneous judgement according to receiving invalid data, affect the normal operation of system.
Summary of the invention
The object of this invention is to provide a kind of data source validity determination methods and dual data source system of selection,, to solve the validity of not considering data source when current dual data source is selected, causing selected data source to be the problem in invalid data source.
The present invention provides a kind of data source validity determination methods for solving the problems of the technologies described above, and the step of this determination methods is as follows;
1) in 61850 messages that adopt according to data source, the validity of data is being transmitted in the judgement of the validity bit-identify of quality factor;
2) invalid if the data of sending in a data source are judged as continuously, and the lasting time of setting, think that this data source is in disarmed state;
3) if the data of sending in a data source from the invalid data that become, and lasting setting-up time, thinks that data source reverts to effective status.
When in described step 1), in 61850 messages, the bit-identify of the validity of quality factor is invalid, these data are invalid.
The present invention also provides a kind of dual data source system of selection for solving the problems of the technologies described above, and the step of this system of selection is as follows:
A. in 61850 messages that adopt according to dual data source, the validity of data is being transmitted in the judgement of the validity bit-identify of quality factor;
If it is invalid that the data of B. sending in a data source are judged as continuously, and continue the time of setting, think that this data source is in disarmed state, if the data of sending in a data source are from the invalid data that become, and lasting setting-up time, thinks that data source reverts to effective status;
C. determine the health status of dual data source device and the communications status of dual data source, and according to the confidence level in the validity computational data source of data source;
D. according to the confidence level of data source, select, if the confidence levels of two data sources is the same, so optional one is primary data source, otherwise selects data source with a high credibility as primary data source.
The computing formula of described data source confidence level is:
Data source confidence level=data source validity+data source communications status+data source device health status
Wherein data source effective status is 1, data source disarmed state is 0; Data source interruption status is 0, and data source connected state is 1; Data source plant failure or maintenance are 0, device is normally 1.
When in described steps A, in 61850 messages, the bit-identify of the validity of quality factor is invalid, these data are invalid.
The invention has the beneficial effects as follows: the present invention by the health status of comprehensive dual data source device, the communications status of data source and data validity far away as the confidence level of data source, select data source with a high credibility as primary data source, the present invention is in primary data source plant failure, communication disruption, during turnaround of unit, can be switched to another data source, and while sending invalid data in primary data source, also can be switched in time the normal data source of data, reduce the probability that above send invalid data, improved the accuracy rate of data.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of dual data source system of selection of the present invention;
Fig. 2 is data source communication conditions and data source device health status processing logic realization flow figure;
Fig. 3 is the invalid decision logic realization flow of data source figure;
Fig. 4 is that data source is selected logic realization process flow diagram.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described.
The embodiment of a kind of data source validity of the present invention determination methods
Data source of the present invention adopts 61850 messages at transport process, the validity of the data that wherein 61850 messages are transmitting at the validity of quality factor bit-identify: the good data of good(), reserved(is predetermined), questionable(is suspicious), invalid(invalid data), according to this quality position, can judge that whether the data of receiving are credible, be invalid if send the validity of quality factor on device, thinks that these data are invalid; Invalid and data source is effective according to above-mentioned principle definition data source, if a data source is sent invalid data on continuously, and the lasting regular hour, think that this data source is in disarmed state; If the data of sending in data source are from the invalid data that become, and certain time, think that data source reverts to effective status.As shown in Figure 3, detailed process is the validity deterministic process of data source: recording the current time is designated as T0; Receive next data; The validity of judgement data; If data are effective, be judged to be data source effective, if remain invalid data, judge whether to meet threshold value condition, Tn is the current time, t is the threshold value of configuration, meets: during Tn-T0>=t, judged that data source is invalid.
The embodiment of a kind of dual data source system of selection of the present invention
Dual data source of the present invention refers to for same measuring point and has 2 independently Data Sources; the interior data collector from process layer of intelligent substation is all dual configuration to the protection observing and controlling of wall; in same interval, two measuring equipments are active and standby each other; the state of all data sources of initialization is normal operation; the primary data source that installation configuration arranges acquiescence is primary data source; when primary data source generation data source device health status changes or starts to carry out data selection when the effective type of data source changes, its concrete selection course is as follows:
1. receive the data of sending from wall data source, interval ID is the sign at interval under data source, data source 1 and data source 2 are two active and standby each other data sources, the primary data source of giving tacit consent to when default data source is system initialization, under certain interval, which two active and standby data source be each other, when system brings into operation, which the primary data source of acquiescence is, to the data of sending in receive two data sources, according to the concrete meaning of 61850 messages and model analyzing data, thereby judge the validity of health status, data source communications status and the data source of two data source apparatus.
The validity of the data that wherein 61850 messages are transmitting at the validity of quality factor bit-identify: the good data of good(), reserved(is predetermined), questionable(is suspicious), invalid(invalid data), according to this quality position, can judge that whether the data of receiving are credible, be invalid if send the validity of quality factor on device, thinks that these data are invalid; Invalid and data source is effective according to above-mentioned principle definition data source, if a data source is sent invalid data on continuously, and the lasting regular hour, think that this data source is in disarmed state; If the data of sending in data source are from the invalid data that become, and certain time, think that data source reverts to effective status.As shown in Figure 3, detailed process is the validity deterministic process of data source: recording the current time is designated as T0; Receive next data; The validity of judgement data; If data are effective, be judged to be data source effective, if remain invalid data, judge whether to meet threshold value condition.Tn is the current time, and t is the threshold value of configuration, meets: during Tn-T0>=t, judged that data source is invalid.
The health status of data source device comprises plant failure or maintenance, installs normally, data source communications status comprises data source interruption status and data source connected state, and the judgement of its concrete state can be determined according to the concrete meaning of 61850 messages and model analyzing data.
2. consider validity, communication conditions, the device health status of data source, definition data source confidence level computing formula is:
Data source confidence level=data source validity+data source communications status+data source device health status.
Wherein data source effective status is 1, data source disarmed state is 0; Data source interruption status is 0, and data source connected state is 1; Data source plant failure or maintenance are 0, device is normally 1.
3. judge the relation between above-mentioned two data source confidence levels, as shown in Figure 4, if the confidence levels of two data sources is the same, so optional one is primary data source, otherwise select data source with a high credibility as primary data source, telemechanical apparatus only will be delivered to scheduling in the data of primary data source.
Claims (5)
1. a data source validity determination methods, is characterized in that, the step of this determination methods is as follows;
1) in 61850 messages that adopt according to data source, the validity of data is being transmitted in the judgement of the validity bit-identify of quality factor;
2) invalid if the data of sending in a data source are judged as continuously, and the lasting time of setting, think that this data source is in disarmed state;
3) if the data of sending in a data source from the invalid data that become, and lasting setting-up time, thinks that data source reverts to effective status.
2. data source validity determination methods according to claim 1, is characterized in that, when in described step 1), in 61850 messages, the bit-identify of the validity of quality factor is invalid, these data are invalid.
3. a dual data source system of selection, is characterized in that, the step of this system of selection is as follows:
A. in 61850 messages that adopt according to dual data source, the validity of data is being transmitted in the judgement of the validity bit-identify of quality factor;
If it is invalid that the data of B. sending in a data source are judged as continuously, and continue the time of setting, think that this data source is in disarmed state, if the data of sending in a data source are from the invalid data that become, and lasting setting-up time, thinks that data source reverts to effective status;
C. determine the health status of dual data source device and the communications status of dual data source, and according to the confidence level in the validity computational data source of data source;
D. according to the confidence level of data source, select, if the confidence levels of two data sources is the same, so optional one is primary data source, otherwise selects data source with a high credibility as primary data source.
4. dual data source system of selection according to claim 3, is characterized in that, the computing formula of described data source confidence level is:
Data source confidence level=data source validity+data source communications status+data source device health status
Wherein data source effective status is 1, data source disarmed state is 0; Data source interruption status is 0, and data source connected state is 1; Data source plant failure or maintenance are 0, device is normally 1.
5. dual data source system of selection according to claim 3, is characterized in that, when in described steps A, in 61850 messages, the bit-identify of the validity of quality factor is invalid, these data are invalid.
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| CN103887884A (en) * | 2014-04-04 | 2014-06-25 | 山东电力工程咨询院有限公司 | Achieving method of transformer substation functional redundancy |
| CN109100691A (en) * | 2018-08-20 | 2018-12-28 | 上海机电工程研究所 | One kind being directed to jamproof data source application method and system |
| CN109491830A (en) * | 2017-09-12 | 2019-03-19 | 北京京东尚科信息技术有限公司 | The method and system in switch data source |
| CN109582617A (en) * | 2018-11-05 | 2019-04-05 | 中国航空工业集团公司西安飞机设计研究所 | A kind of data selecting method in multi-level bus data transmission |
| CN110824961A (en) * | 2019-10-31 | 2020-02-21 | 航宇救生装备有限公司 | Method for selecting multiple data sources of main control device of ejection lifesaving system |
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| CN110824961A (en) * | 2019-10-31 | 2020-02-21 | 航宇救生装备有限公司 | Method for selecting multiple data sources of main control device of ejection lifesaving system |
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