CN112766636B - Distribution transformer power failure judgment method based on electric quantity information acquired by power consumption information acquisition terminal - Google Patents
Distribution transformer power failure judgment method based on electric quantity information acquired by power consumption information acquisition terminal Download PDFInfo
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Abstract
The application discloses distribution transformer power failure judgment method based on electric quantity information collected by power consumption information collection terminal, comprising the following steps: acquiring equipment ledger data, a corresponding relation between a line and an offline distribution transformer and power grid topology information; identifying suspected power failure events of the distribution transformer according to the interruption information of the distribution transformer electrical quantity; collecting the current drop condition of the line to which the suspected power-cut distribution transformer belongs, the suspected power-cut proportion condition of all distribution transformers under the line, the power-cut information and the electric energy indicating value of the suspected power-cut distribution transformer; according to the collected information, the suspected power failure events of the distribution transformer are confirmed and classified; and calculating a power failure index according to the power failure information of the distribution transformer, and carrying out targeted management work of the distribution transformer. The invention is based on big data analysis, adopts computer informatization means, improves the accuracy of distribution transformer power failure monitoring, is beneficial to pertinently developing the management work of frequent power failure distribution transformer and overtime power failure distribution transformer, reduces frequent power failure complaints and improves the power supply reliability.
Description
Technical Field
The invention belongs to the technical field of power distribution systems, and relates to a power distribution and transformation outage judgment method based on electric quantity information collected by a power utilization information collection terminal.
Background
In recent years, the power operator environment is gradually optimized to improve the reliability of power supply for users. Power outages are a major factor affecting the reliability of the user's power supply and are therefore of great interest. Distribution transformer is as the direct source of user's power consumption, and distribution transformer power failure will directly lead to the unable power consumption of user, consequently need to carry out effective monitoring and initiative operation and maintenance to distribution transformer power failure urgently.
Currently, there are several approaches to reliably monitor distribution transformer blackouts:
the method has the advantages that reliable monitoring of distribution automation equipment such as intelligent distribution transformer terminals is relied on, and although the monitoring accuracy is high, the problems that the intelligent distribution transformer terminals are not covered by large-range distribution transformers, the coverage rate is low, and the construction cost is high exist;
and secondly, the power failure and recovery alarm information of the power utilization information acquisition terminal is relied on, although the coverage rate of the power utilization information acquisition terminal is high, the influence of problems such as acquisition, transmission channel and clock calibration exists, a large amount of data abnormity and missing acquisition conditions exist, and the accuracy rate is not high.
Disclosure of Invention
In order to solve the defects in the prior art, the power failure judgment method for the distribution transformer based on the power consumption information acquisition terminal is reliable and considers data quality processing, and the power failure judgment method is used for solving the problem of low power failure judgment accuracy caused by low coverage rate of the intelligent distribution transformer terminal and poor power failure alarm information data quality of the power consumption information acquisition terminal during power failure of the distribution transformer.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a distribution transformer power failure judgment method based on electric quantity information collected by an electricity utilization information collection terminal comprises the following steps:
step 1: acquiring equipment ledger data, line and offline distribution transformation corresponding relation and power grid topology information;
and 2, step: collecting distribution and transformation electric quantity interruption information;
and step 3: performing suspected power failure event identification on the distribution transformer according to the distribution transformer electric quantity interruption information;
and 4, step 4: collecting the current drop condition of the line to which the suspected power failure distribution transformer belongs, the suspected power failure proportion conditions of all distribution transformers under the line, the power failure information and the electric energy indicating value of the suspected power failure distribution transformer;
and 5: according to the information collected in the step 4, confirming distribution transformer power failure and judging classification of suspected distribution transformer power failure events;
step 6: and (5) calculating a power failure index according to the power failure information of the distribution transformer obtained in the step (5), wherein the power failure index is used for carrying out the targeted management work of the distribution transformer.
The invention further comprises the following preferred embodiments:
preferably, the acquiring device ledger data, line-to-offline distribution transformation corresponding relations, and power grid topology information in step 1 specifically includes:
the method comprises the steps that public equipment ledger data and the corresponding relation between lines and public distribution transformers are obtained from an electric power production management system, power grid topology information is obtained from a GIS system, and special equipment ledger data and the corresponding relation between lines and special distribution transformers are obtained from a marketing business application system;
the equipment standing book data comprises line standing book data and distribution transformer standing book data;
the line ledger data comprises information such as ID, name, local city, substation and operation and maintenance unit of the line;
the distribution transformer ledger data comprises information such as a distribution transformer name, a distribution transformer ID, a belonging line and an operation and maintenance unit;
the power grid topology information comprises power grid topology information of lines, distribution transformers, switches, towers and the like.
Preferably, in the step 2, the distribution and transformation electric quantity interruption information is acquired through an electricity information acquisition system;
and the interruption of the distribution transformer electric quantity means that the three-phase current, the three-phase voltage, the active power and the reactive power of the distribution transformer are all null or zero.
Preferably, in step 3, if the distribution and transformation electric quantity interruption duration exceeds 30 minutes, that is, the duration of all of the distribution and transformation three-phase voltage, three-phase current, active power and reactive power is empty or zero exceeds 30 minutes, it is determined that a suspected power failure occurs in the distribution and transformation.
Preferably, in the step 4, the current drop condition of the line to which the suspected power failure distribution transformer belongs is collected through a power grid dispatching automation D5000 system;
acquiring suspected power failure proportion conditions of all distribution transformers under the lines in the suspected power failure time period of the distribution transformers by using a power utilization information acquisition system;
collecting line reporting and power failure information of a line to which the distribution transformer belongs through a national network 95598 business support system;
and the suspected power failure distribution transformer electric energy indication value information is acquired through the power utilization information acquisition system.
Preferably, in step 5, in the suspected power failure time period of the distribution transformer, when the current of the line to which the distribution transformer belongs falls from 10A or more to 2A or less and the suspected power failure proportion of all the distribution transformers under the line to which the distribution transformer belongs exceeds 50%, it is determined that the distribution transformer has confirmed power failure and belongs to power failure of the distribution transformer caused by the line full-line stop;
in the suspected power failure time period of the distribution transformer, when reporting power failure information exists in the line to which the distribution transformer belongs at the same time, and the suspected power failure proportion of all the distribution transformers under the line to which the distribution transformer belongs exceeds 20%, judging that the distribution transformer confirms power failure and belongs to power failure of the distribution transformer caused by the line full-line stop;
preferably, in step 5, the suspected power failure information of the remaining distribution transformers, in addition to the distribution transformer power failure caused by the line full-line shutdown, is subjected to the following steps to determine the distribution transformer power failure caused by the actual line non-full-line shutdown:
specifically, the difference value of the electric energy indication values before and after the suspected power failure of the distribution transformer is smaller than the minimum non-zero value of the difference value of the electric energy indication values before and after the same time of the first two weeks, and the distribution transformer is judged to be power failure caused by non-full line stop of the actual line;
the difference value of the electric energy indication values before and after the suspected power failure of the distribution transformer is larger than or equal to the minimum non-zero value of the difference value of the electric energy indication values before and after the same time of the previous two weeks, and the distribution transformer is judged not to be in power failure of the real distribution transformer;
if the electric energy indication value exists after the time is changed, the judgment is carried out according to the changed time; if the electric energy indication value still does not exist after the change time, judging that the power failure of the real distribution transformer does not exist;
preferably, for distribution transformer power failure caused by incomplete line stop of an actual line, if a suspected power failure occurs at the same time when 3 or more distribution transformers exist in the distribution transformer belonging line at the same time, the distribution transformer power failure caused by partial power failure of the line is judged, and otherwise, the single distribution transformer power failure is judged.
Preferably, in step 6, the power failure indicators include power failure duration of distribution transformer, power failure distribution variable exceeding 100 hours, frequent power failure distribution transformer, and power failure rate of distribution transformer;
the power failure duration of the distribution transformer is the power restoration time minus the power failure time of the distribution transformer;
the distribution variable exceeding 100 hours after power failure is the distribution variable quantity exceeding 100 hours accumulated in the power failure duration within the statistical period;
the frequent power failure distribution changes are power failure distribution changes for 3 times or more in a statistical period in two months;
the power distribution and transformation outage rate satisfies the following relational expression:
the distribution transformer power failure rate is the frequency of power failure of each hundred distribution transformers in a certain area, and the unit is station frequency/hundred stations.
The beneficial effect that this application reached:
based on big data analysis, a computer informatization means is adopted, the accuracy of power failure monitoring of the power distribution transformer is improved, the management work of frequent power failure distribution transformer and overtime power failure distribution transformer is favorably developed in a targeted manner, frequent power failure complaints are reduced, and the power supply reliability is improved.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a flow chart of an embodiment of the method of the present invention.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
As shown in fig. 1 to 2, the method for determining power failure of a distribution transformer based on electrical quantity information collected by an electricity information collection terminal of the present invention includes the following steps:
step 1: the method comprises the following steps of obtaining equipment ledger data, line and offline distribution transformation corresponding relations and power grid topology information, specifically:
acquiring public equipment ledger data and a corresponding relation between a line and a public distribution transformer from an electric power production management system (pms 2.0 system), acquiring power grid topology information from a GIS system, and acquiring special equipment ledger data and a corresponding relation between the line and the special distribution transformer from a marketing service application system;
the GIS System is a Geographic Information System, namely a Geographic Information System or Geo-Information System, which is called GIS for short;
the equipment standing book data comprises line standing book data and distribution transformer standing book data;
the line ledger data comprises information such as ID, name, local city, substation and operation and maintenance unit of the line;
the distribution transformer ledger data comprises information such as a distribution transformer name, a distribution transformer ID, a belonging line and an operation and maintenance unit;
the power grid topology information comprises power grid topology information of equipment such as lines, distribution transformers, switches and towers.
In particular, a particular line, such as a 10 kv line, may be selected.
And 2, step: and collecting the interruption information of the distribution and transformation electrical quantity.
Collecting distribution and transformation electric quantity interruption information through an electricity information collection system;
and the interruption of the distribution transformer electric quantity means that the three-phase current, the three-phase voltage, the active power and the reactive power of the distribution transformer are all null or zero.
And 3, step 3: and identifying suspected power failure events of the distribution transformer according to the interruption information of the distribution transformer electrical quantity.
If the interruption duration of the distribution and transformation electric quantity exceeds 30 minutes, namely the duration of the distribution and transformation three-phase voltage, three-phase current, active power and reactive power all being null or zero exceeds 30 minutes, the suspected power failure of the distribution and transformation is judged.
And 4, step 4: the method comprises the following steps of collecting information such as current drop conditions of lines to which suspected power failure distribution transformers belong, suspected power failure proportion conditions of all distribution transformers under the lines, power failure information and electric energy indicating values of the suspected power failure distribution transformers, and specifically:
collecting the current drop condition of a line to which a suspected power failure distribution transformer belongs through a power grid dispatching automation D5000 system;
acquiring suspected power failure proportion conditions of all distribution transformers under the lines in the suspected power failure time period of the distribution transformers by using a power utilization information acquisition system;
acquiring line reporting power failure information of a line to which the distribution transformer belongs through a national network 95598 business support system;
and the suspected power failure distribution transformer electric energy indication value information is acquired through the power utilization information acquisition system.
And 5: and (5) according to the information collected in the step (4), performing power failure confirmation and classification judgment on suspected power failure events of the distribution transformer.
Specifically, in the suspected power failure time period of the distribution transformer, when the current of the line to which the distribution transformer belongs falls from 10A or more to 2A or less and the suspected power failure ratio of all the distribution transformers under the line to which the distribution transformer belongs exceeds 50%, the distribution transformer is judged to confirm power failure and belong to power failure of the distribution transformer caused by line stop.
Specifically, in the suspected power failure time period of the distribution transformer, when the reporting power failure information exists in the line to which the distribution transformer belongs at the same time, and the suspected power failure proportion of all the distribution transformers under the line to which the distribution transformer belongs exceeds 20%, the distribution transformer is judged to confirm power failure and belong to power failure of the distribution transformer caused by the line full stop.
And (4) carrying out the following steps on the suspected power failure information of the other distribution transformers to judge the power failure of the distribution transformers caused by the non-full line stop of the actual line.
Specifically, the difference value of the electric energy indication values before and after the suspected power failure of the distribution transformer is smaller than the minimum non-zero value of the difference value of the electric energy indication values before and after the same time of the first two weeks, and the distribution transformer is judged to be power failure caused by non-full line stop of the actual line;
the difference value of the electric energy indication values before and after the suspected power failure of the distribution transformer is larger than or equal to the minimum non-zero value of the difference value of the electric energy indication values before and after the same time of the previous two weeks, and the distribution transformer is judged not to be in power failure of the real distribution transformer;
for the condition that the electric energy indication value does not exist at the moment before and after the suspected power failure of the distribution transformer, the method can be pushed forwards or backwards for at most 30 minutes (the electric energy information acquisition system acquires the electric energy indication value once in 15 minutes, namely at most two points), and if the electric energy indication value exists after the time is changed, the judgment is carried out according to the time after the time is changed; and if the electric energy indication value still does not exist after the change time, judging that the power failure is not the actual distribution power failure.
And for distribution transformer power failure caused by incomplete line stop of the actual line, if the suspected power failure occurs at the same time of 3 or more distribution transformers in the line to which the distribution transformer belongs, the distribution transformer power failure caused by partial power failure of the line is judged, and otherwise, the single distribution transformer power failure is judged.
And 6: and (5) calculating a power failure index according to the power failure information of the distribution transformer obtained in the step (5), namely the power failure information of the distribution transformer comprises power failure of the distribution transformer caused by the stop of the whole line of the line, power failure of the distribution transformer caused by the stop of the part of the line and power failure information of the single distribution transformer, wherein the power failure index is used for carrying out the targeted management work of the distribution transformer.
Specifically, the distribution transformer power failure information includes distribution transformer power failure caused by line full line stop, distribution transformer power failure caused by line partial stop, and single distribution transformer power failure.
The power failure indexes comprise the power failure duration of the distribution transformer, the distribution variables when the power failure exceeds 100 hours, the frequent power failure distribution transformer and the power failure rate of the distribution transformer;
the power failure time of the distribution transformer is the power restoration time minus the power failure time of the distribution transformer;
the distribution variable exceeding 100 hours after power failure is the distribution variable quantity exceeding 100 hours accumulated in the power failure duration within the statistical period;
the frequent power-off distribution change is a distribution change which is powered off for 3 times or more in a statistical period in two months;
the distribution transformer outage rate satisfies the following relational expression:
the distribution transformer power failure rate is the frequency of power failure of each hundred distribution transformers in a certain area, and the unit is station frequency/hundred stations.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are merely preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for limiting the scope of the present invention, and on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.
Claims (9)
1. Distribution transformer power failure judgment method based on electric quantity information collected by power consumption information collection terminal is characterized in that:
the method comprises the following steps:
step 1: acquiring equipment ledger data, a corresponding relation between a line and an offline distribution transformer and power grid topology information;
step 2: acquiring interruption information of distribution and transformation electric quantities, wherein the electric quantities comprise three-phase current, three-phase voltage, active power and reactive power;
and step 3: performing suspected power failure event identification on the distribution transformer according to the distribution transformer electrical quantity interruption information, and if the distribution transformer electrical quantity interruption duration time exceeds 30 minutes, judging that suspected power failure occurs in the distribution transformer;
and 4, step 4: collecting the current drop condition of the line to which the suspected power-cut distribution transformer belongs, the suspected power-cut proportion condition of all distribution transformers under the line, the power-cut information and the electric energy indicating value of the suspected power-cut distribution transformer;
and 5: according to the information collected in the step 4, the suspected power failure event of the distribution transformer is subjected to distribution transformer power failure confirmation and classification judgment, and the method comprises the following steps:
firstly, in a suspected power failure time period of the distribution transformer, power failure confirmation and judgment of power failure of the distribution transformer caused by line full-line stop are carried out according to the current drop condition and the suspected power failure proportion condition or according to reported power failure information and the suspected power failure proportion condition;
secondly, judging distribution transformer power failure and non-actual distribution transformer power failure caused by non-full line stop of an actual line according to the electric energy indication value of the suspected power failure distribution transformer and historical data thereof;
finally, for the distribution transformer power failure caused by the incomplete line stop of the actual line, and the distribution transformer quantity of suspected power failure at the same time of the line to which the distribution transformer belongs, the distribution transformer power failure caused by the partial power failure of the line and the single distribution transformer power failure are judged;
and 6: and 5, calculating a power failure index according to the power failure information of the distribution transformer obtained in the step 5, wherein the power failure index is used for carrying out the targeted management work of the distribution transformer.
2. The power distribution and transformation outage judgment method based on the electrical quantity information collected by the power utilization information collection terminal according to claim 1, characterized by comprising the following steps:
step 1, acquiring equipment ledger data, line-to-offline distribution transformation corresponding relations and power grid topology information, specifically comprising:
the method comprises the steps that public equipment ledger data and the corresponding relation between lines and public distribution transformers are obtained from an electric power production management system, power grid topology information is obtained from a GIS system, and special equipment ledger data and the corresponding relation between lines and special distribution transformers are obtained from a marketing business application system;
the equipment standing book data comprises line standing book data and distribution transformer standing book data;
the line ledger data comprises ID, name, local city, substation and operation and maintenance unit information of the line;
the distribution transformer ledger data comprises a distribution transformer name, a distribution transformer ID, a belonging line and operation and maintenance unit information;
the power grid topology information comprises power grid topology information of lines, distribution transformers, switches and towers.
3. The power distribution and transformation outage judgment method based on electric quantity information collected by the power utilization information collection terminal according to claim 1 or 2, and is characterized in that:
in step 2, the power distribution and transformation electric quantity interruption information is collected through a power utilization information collection system;
and the interruption of the distribution transformer electric quantity means that the three-phase current, the three-phase voltage, the active power and the reactive power of the distribution transformer are all null or zero.
4. The power failure judgment method for distribution transformer based on electric quantity information collected by the power utilization information collection terminal according to claim 3, characterized in that:
in the step 3, if the interruption duration of the distribution transformer electric quantity exceeds 30 minutes, namely the duration of the distribution transformer three-phase voltage, three-phase current, active power and reactive power which are all null or zero exceeds 30 minutes, it is judged that the distribution transformer is suspected to have power failure.
5. The power distribution and transformation outage judgment method based on electric quantity information collected by the power utilization information collection terminal according to claim 1 or 4, and is characterized in that:
step 4, collecting the current drop condition of the line to which the suspected power failure distribution transformer belongs through a power grid dispatching automation D5000 system;
acquiring suspected power failure proportion conditions of all distribution transformers under the lines in the suspected power failure time period of the distribution transformers by using a power utilization information acquisition system;
acquiring line reporting power failure information of a line to which the distribution transformer belongs through a national network 95598 business support system;
and the suspected power failure distribution transformer electric energy indication value information is acquired through the power utilization information acquisition system.
6. The power failure judgment method for distribution transformer based on electric quantity information collected by power utilization information collection terminal according to claim 5, characterized by comprising the following steps:
step 5, in the suspected power failure time period of the distribution transformer, when the current of the line to which the distribution transformer belongs falls from 10A to 2A and below, and the suspected power failure ratio of all the distribution transformers under the line to which the distribution transformer belongs exceeds 50%, determining that the distribution transformer confirms power failure and belongs to power failure of the distribution transformer caused by line stop;
and in the suspected power failure time period of the distribution transformer, when the reported power failure information exists in the line to which the distribution transformer belongs at the same time, and the suspected power failure proportion of all the distribution transformers under the line to which the distribution transformer belongs exceeds 20%, judging that the distribution transformer confirms the power failure and belongs to the power failure of the distribution transformer caused by the line full-line stop.
7. The power failure judgment method for distribution transformer based on electric quantity information collected by the power utilization information collection terminal according to claim 6, characterized in that:
in step 5, the suspected power failure information of the other distribution transformers except the distribution transformer power failure caused by the line full line stop is subjected to the following steps to judge the distribution transformer power failure caused by the actual line non-full line stop:
the difference value of the electric energy indication values before and after the suspected power failure of the distribution transformer is smaller than the minimum non-zero value of the difference value of the electric energy indication values before and after the same time of the previous two weeks, and the distribution transformer is judged to be power failure caused by the non-full line stop of the actual line;
the difference value of the electric energy indication values before and after the suspected power failure of the distribution transformer is larger than or equal to the minimum nonzero value of the difference value of the electric energy indication values before and after the same time of the previous two weeks, and the distribution transformer is judged not to belong to the actual power failure of the distribution transformer;
if the electric energy indication value exists after the time is changed, the judgment is carried out according to the changed time; and if the electric energy indication value still does not exist after the change time, judging that the power failure is not the actual distribution power failure.
8. The power distribution and transformation outage judgment method based on the electrical quantity information collected by the power utilization information collection terminal according to claim 7, wherein the power distribution and transformation outage judgment method comprises the following steps:
and for distribution transformer power failure caused by incomplete line stop of the actual line, if the suspected power failure occurs at the same time of 3 or more distribution transformers in the line to which the distribution transformer belongs, the distribution transformer power failure caused by partial power failure of the line is judged, and otherwise, the single distribution transformer power failure is judged.
9. The power failure judgment method for distribution transformer based on electric quantity information collected by the power utilization information collection terminal according to claim 1 or 8, characterized by comprising the following steps:
step 6, the power failure indexes comprise power failure duration of the distribution transformer, distribution variables when power failure exceeds 100 hours, frequent power failure distribution transformers and power failure rate of the distribution transformer;
the power failure duration of the distribution transformer is the power restoration time minus the power failure time of the distribution transformer;
the distribution variable exceeding 100 hours after power failure is the distribution variable quantity exceeding 100 hours accumulated in the power failure duration within the statistical period;
the frequent power failure distribution changes are power failure distribution changes for 3 times or more in a statistical period in two months;
the power distribution and transformation outage rate satisfies the following relational expression:
the distribution transformer power failure rate is the frequency of power failure of each hundred distribution transformers in a certain area, and the unit is station frequency/hundred stations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011546784.XA CN112766636B (en) | 2020-12-23 | 2020-12-23 | Distribution transformer power failure judgment method based on electric quantity information acquired by power consumption information acquisition terminal |
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| CN113872200B (en) * | 2021-10-13 | 2023-11-24 | 国网江苏省电力有限公司电力科学研究院 | Medium-voltage distribution network power failure event diagnosis and identification method, system and storage medium |
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