CN109004659A - A kind of distribution transforming active load imbalance judgment method based on metering centralized meter reading terminal data - Google Patents
A kind of distribution transforming active load imbalance judgment method based on metering centralized meter reading terminal data Download PDFInfo
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- CN109004659A CN109004659A CN201710425638.3A CN201710425638A CN109004659A CN 109004659 A CN109004659 A CN 109004659A CN 201710425638 A CN201710425638 A CN 201710425638A CN 109004659 A CN109004659 A CN 109004659A
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- active load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The present invention provides a kind of distribution transforming active load imbalance judgment method based on metering centralized meter reading terminal data, this method calculates the three-phase active load degree of unbalancedness of each data break of the distribution transforming according to the calculation method of three-phase active load degree of unbalancedness in certain time length；Judge whether each phase active load situation of each data break has reached the threshold values of judgement；When each phase active load situation has reached the threshold values of judgement, judge whether the three-phase active load degree of unbalancedness of each data break has reached the threshold values of judgement；When each phase active load situation has reached the threshold values of judgement and three-phase active load degree of unbalancedness has reached the threshold values of judgement, which is denoted as active load imbalance；The unbalanced number of active load in the time span is counted, then divided by the data break sum in the time span, obtains the unbalanced duration accounting of active load, if the duration accounting is greater than decision threshold, which is judged as active load imbalance.
Description
Technical field
The present invention relates to field of power systems, have more particularly, to a kind of distribution transforming based on metering centralized meter reading terminal data
Function laod unbalance judgment method.
Background technique
The intelligent centralized meter reading terminal of metering automation system has been realized substantially acquires three distant data of distribution transformer, former
The balance movement situation for capableing of three-phase active load to distribution transformer in reason is analyzed.But it is copied currently based on metering collection
The example that terminal data analyzes the operating status of distribution transformer three-phase active load is few, and reason mainly has following:
1) the case where sending data to rely on wireless network in terminal, loss of data had due to signal problem；
2) terminal itself quality problems cause to lack data or data inaccuracy；
3) data memory gap is not short enough, and most of only 15 minutes finenesses cannot achieve real time monitoring.
Summary of the invention
The present invention provides a kind of distribution transforming active load imbalance judgment method based on metering centralized meter reading terminal data, this method
Can the three-phase active load situation to distribution transformer assess, judge its unbalanced state and degree.
In order to reach above-mentioned technical effect, technical scheme is as follows:
A kind of distribution transforming active load imbalance judgment method based on metering centralized meter reading terminal data, comprising the following steps:
S1: calculating distribution transforming every 15 minutes three-phase active load degree of unbalancedness S, and calculation formula is as follows:
S2: judging whether every 15 minutes S are greater than threshold values Ss, if more than then judging that the distribution transforming threephase load in 15 minutes is uneven
Weighing apparatus, otherwise it is assumed that its three-phase active load is uneven；
S3: judge every 15 minutes it is each it is mutually active whether be greater than Ps, any mutually active Ps that is greater than is according to condition 3. to judge, no
Then think this 15 minutes distribution transforming three-phase active load balances；
S4: counting the Sc in this month, by formula:
Computational load three-phase imbalance time accounting T；
S5: judging whether T is greater than Ts, if more than this month active load imbalance of the distribution transforming then being judged, otherwise it is assumed that should
This month active load balance of distribution transforming；
Wherein, Ps is the active threshold values of individual event, and Ss is degree of unbalancedness threshold values, and Ts is duration accounting threshold values, and T is duration accounting,
Sc is uneven number, and St is 15 minutes numbers in statistical time length.
Compared with prior art, the beneficial effect of technical solution of the present invention is:
The method of the present invention calculates this according to the calculation method of three-phase active load degree of unbalancedness and matches in certain time length
Become the three-phase active load degree of unbalancedness of each data break；Judge each data break each phase active load situation whether
Have reached the threshold values of judgement；When each phase active load situation has reached the threshold values of judgement, the three-phase of each data break is judged
Whether active load degree of unbalancedness has reached the threshold values of judgement；When each phase active load situation has reached the threshold values and three-phase of judgement
When active load degree of unbalancedness has reached the threshold values of judgement, which is denoted as active load imbalance；Count the time
The unbalanced number of active load in length, then divided by the data break sum in the time span, obtain active load injustice
The distribution transforming is judged as active load imbalance if the duration accounting is greater than decision threshold by the duration accounting of weighing apparatus.This method energy
Enough utilize the data of the general measuring terminal of quality；Using the data of regular period, the interference of data fluctuations can be removed from；Using
The data of long-term can be derived that statistical law, not engrave when single and go into seriously accuracy.
Detailed description of the invention
Fig. 1 is the method for the present invention flow chart.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
In order to better illustrate this embodiment, the certain components of attached drawing have omission, zoom in or out, and do not represent actual product
Size；
To those skilled in the art, it is to be understood that certain known features and its explanation, which may be omitted, in attached drawing
's.
The following further describes the technical solution of the present invention with reference to the accompanying drawings and examples.
Embodiment 1
As shown in Figure 1, a kind of distribution transforming active load imbalance judgment method based on metering centralized meter reading terminal data, including with
Lower step:
S1: calculating distribution transforming every 15 minutes three-phase active load degree of unbalancedness S, and calculation formula is as follows:
S2: judging whether every 15 minutes S are greater than threshold values Ss, if more than then judging that the distribution transforming threephase load in 15 minutes is uneven
Weighing apparatus, otherwise it is assumed that its three-phase active load is uneven；
S3: judge every 15 minutes it is each it is mutually active whether be greater than Ps, any mutually active Ps that is greater than is according to condition 3. to judge, no
Then think this 15 minutes distribution transforming three-phase active load balances；
S4: counting the Sc in this month, by formula:
Computational load three-phase imbalance time accounting T；
S5: judging whether T is greater than Ts, if more than this month active load imbalance of the distribution transforming then being judged, otherwise it is assumed that should
This month active load balance of distribution transforming；
Wherein, Ps is the active threshold values of individual event, and Ss is degree of unbalancedness threshold values, and Ts is duration accounting threshold values, and T is duration accounting,
Sc is uneven number, and St is 15 minutes numbers in statistical time length.
It is every that this method calculates the distribution transforming in certain time length, according to the calculation method of three-phase active load degree of unbalancedness
The three-phase active load degree of unbalancedness of one data break；Judge whether each phase active load situation of each data break has reached
To the threshold values of judgement；When each phase active load situation has reached the threshold values of judgement, judge that the three-phase of each data break is active
Whether laod unbalance degree has reached the threshold values of judgement；When each phase active load situation has reached the threshold values of judgement and three-phase is active
When laod unbalance degree has reached the threshold values of judgement, which is denoted as active load imbalance；Count the time span
The interior unbalanced number of active load, then divided by the data break sum in the time span, show that active load is unbalanced
The distribution transforming is judged as active load imbalance if the duration accounting is greater than decision threshold by duration accounting.This method being capable of benefit
With the data of the general measuring terminal of quality；Using the data of regular period, the interference of data fluctuations can be removed from；Using it is long when
The data of phase can be derived that statistical law, not engrave when single and go into seriously accuracy.
The same or similar label correspond to the same or similar components；
Described in attached drawing positional relationship for only for illustration, should not be understood as the limitation to this patent；
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (1)
1. it is a kind of based on metering centralized meter reading terminal data distribution transforming active load imbalance judgment method, which is characterized in that including with
Lower step:
S1: calculating distribution transforming every 15 minutes three-phase active load degree of unbalancedness S, and calculation formula is as follows:
S2: judging whether every 15 minutes S are greater than threshold values Ss, if more than then judging that the distribution transforming threephase load in 15 minutes is uneven,
Otherwise it is assumed that its three-phase active load is uneven；
S3: judge every 15 minutes it is each it is mutually active whether be greater than Ps, any mutually active Ps that is greater than is according to condition 3. to judge, is otherwise recognized
For this 15 minutes, the distribution transforming three-phase active load was balanced；
S4: counting the Sc in this month, by formula:
Computational load three-phase imbalance time accounting T；
S5: judging whether T is greater than Ts, if more than this month active load imbalance of the distribution transforming then being judged, otherwise it is assumed that the distribution transforming
This month active load balance；
Wherein, Ps is the active threshold values of individual event, and Ss is degree of unbalancedness threshold values, and Ts is duration accounting threshold values, and T is duration accounting, and Sc is
Uneven number, St are 15 minutes numbers in statistical time length.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112436530A (en) * | 2020-12-01 | 2021-03-02 | 广东电网有限责任公司佛山供电局 | Method for judging three-phase imbalance of feeder load at tail end of power distribution network |
| CN112467763A (en) * | 2020-12-01 | 2021-03-09 | 广东电网有限责任公司佛山供电局 | Evaluation method for three-phase unbalance state of distribution transformer load |
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Application publication date: 20181214 |