CN109919328B - Low-voltage branch line power failure research and judgment method based on multi-source power failure event - Google Patents
Low-voltage branch line power failure research and judgment method based on multi-source power failure event Download PDFInfo
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Abstract
The invention discloses a low-voltage branch line power failure research and judgment method based on a multi-source power failure event, and relates to the field of electric power operation and maintenance. The data source of the low-voltage branch line is complex, the power failure research and judgment is complex, and the accuracy is low. The invention comprises the following steps: receiving a terminal and a meter event, and starting to judge under the condition of power failure in a non-transformer area; judging whether more than 2 lower-level power failure data sources below the low-voltage branch line appear; if yes, studying and judging the concentrator and the meter; if not, performing subordinate level power failure research and judgment according to the subordinate relation between the concentrator and the meter; if the low-voltage branch is judged to be powered off through the study of the concentrator and the meter, if not, the study of the power off of the subordinate level is carried out according to the subordinate relationship between the concentrator and the meter; and confirming the power failure condition of the low-voltage branch line according to the power failure research and judgment condition. According to the technical scheme, multiple power failure data sources are combined and used, and power failure events and power failure calling and measuring results are actively carried out, so that the accuracy and the real-time performance of the low-voltage branch line power failure are improved.
Description
Technical Field
The invention relates to the field of electric power operation and maintenance, in particular to a low-voltage branch line power failure research and judgment method based on a multi-source power failure event.
Background
With the rapid development of electric power science and technology and the continuous acceleration of informatization process, a new revolution of optimizing an energy structure and realizing energy strategy transformation is deeply promoted in the world, and a smart grid becomes an important trend of international electric power development. The acquisition system provides a large amount of service and data support in the aspect of supporting distribution network operation management all the time, and plays an important role in power failure analysis service application.
At present, in the electricity utilization information acquisition scheme adopted by national grid companies, the power failure conditions of the distribution area and the meter can be judged afterwards through the power failure events of the acquisition terminal and the power failure records of the intelligent electric meter, the effectiveness of power failure of the private-public transformer is determined, and the power supply reliability is further managed. The low-voltage branch line is a line branch under the public transformer, the condition that the station area has no power failure but the low-voltage branch line has power failure appears on site for multiple times, the data source of the low-voltage branch line is complex, the study and judgment on the power failure are complex, and the accuracy is low.
Disclosure of Invention
The technical problem to be solved and the technical task are to perfect and improve the prior technical scheme, and provide a low-voltage branch line power failure studying and judging method based on a multi-source power failure event so as to achieve the purpose of accurately studying and judging the power failure of multi-source power failure data. Therefore, the invention adopts the following technical scheme.
A low-voltage branch line power failure research and judgment method based on a multi-source power failure event is characterized by comprising the following steps:
1) storing information of the low-voltage branch lines, combing and summarizing the distribution conditions of the low-voltage branch lines, the concentrator and the meter under each acquisition scheme, and confirming the subordination relation between the concentrator and the meter;
2) receiving a terminal and a meter event, and starting to judge whether the low-voltage branch line has power failure or not under the condition of confirming that the non-station area has power failure;
3) judging whether more than 2 lower-level power failure data sources below the low-voltage branch line appear; if yes, carrying out multi-type power failure data combination study and judgment on the concentrator and the meter; if not, performing subordinate level power failure research and judgment according to the subordinate relation between the concentrator and the meter; the subordinate level unit is a building or a meter box;
when the multi-type power failure data combination of the concentrator and the meter is researched and judged:
a) the method comprises the steps that a subordinate relation between a terminal and a meter is combined, existing power failure events of lower levels of a low-voltage branch line are researched and judged, active power failure events are preferentially used, and when a II-type concentrator and the meter which actively report the power failure events exist in a master station, the master station directly judges that power failure occurs, so that the number of times of calling the meter is reduced;
b) When the master station does not have the II-type concentrator to actively report the power failure event, all the II-type concentrators call for the A-phase voltage;
c) when the number of the II-type concentrators below the low-voltage branch line is less than 3, other n tables of the subordination relation of the II-type concentrators which are not powered off are called up and tested at random, wherein the number of n depends on the number of the II-type concentrators which are not powered off;
d) when more than three next-level reported power failure events exist below the low-voltage branch line, 3 different terminals or meters of the attribution level are needed to study and judge the power failure condition; if the number of the terminals is less than 3, all terminals or meters belonging to the hierarchy need to be powered off;
4) if the multi-type power failure data combination of the concentrator and the meter is researched and judged, the low-voltage branch power failure is confirmed, and if not, the subordinate level power failure is researched and judged according to the subordinate relation of the concentrator and the meter;
5) and confirming the power failure condition of the low-voltage branch line according to the power failure research and judgment condition.
According to the technical scheme, the power failure items of the transformer area are eliminated, the occurrence of misjudgment is prevented, and the power failure research and judgment speed is increased; meanwhile, after the power failure in the transformer area is researched and judged, whether more than 2 lower-level power failure data sources under the low-voltage branch line exist is judged; if yes, carrying out multi-type power failure data combination study and judgment on the concentrator and the meter; if not, performing subordinate level power failure research and judgment according to the subordinate relation between the concentrator and the meter; and the condition of missing judgment is prevented.
As a preferable technical means: in step 3), the study and judgment of the power failure event comprises the study and judgment of the power failure event of the terminal and the meter, and the study and judgment of the power failure event of the terminal comprises the following steps:
301) acquiring a power failure event reported by a terminal;
302) judging whether a simultaneous section power failure record exists or not; if yes, ending; if not, entering the next step;
303) judging whether a marketing in-transit replacement process is in progress; if yes, ending; if not, entering the next step;
304) judging the blacklist, namely judging that the terminal belongs to the blacklist, if so, only processing the first report of the terminal on the same day, and counting the reporting times;
305) judging and correcting time validity, and taking the current time of the system as the power failure time by aiming at the terminal with the alarm time being empty or the time lagging the system time or the alarm time 3 days before, and correcting the current time to be valid; the others are effective, and the time of reporting the event is taken as the standard;
306) calling and testing the phase voltage of the terminal A;
307) whether power failure carries out validity analysis, when satisfying: when the terminal voltage is called for and has no return person, the terminal voltage value is zero, or the terminal voltage value is not more than 132, the power failure is considered; when the power failure is effective, entering the next step, otherwise, ending;
308) and the terminal reports the power failure event.
As a preferable technical means: the power failure event study and judgment of the meter comprises the following steps:
311) acquiring a power failure event reported by a collector or a meter through a terminal;
312) judging whether a simultaneous section power failure record exists or not; if not, carrying out blacklist judgment, and if not, directly ending;
313) judging a blacklist, judging whether reporting equipment belongs to the blacklist, and if so, only processing the equipment to report for the first time on the same day;
314) judging and correcting time validity, and taking the current time of the system as the power failure time for the terminal with the alarm time being empty or the time lagging the system time; judging the alarm time before 3 days to be invalid, confirming false alarm, and eliminating power failure in the existing time period; others are effective;
315) whether power failure carries out validity analysis, when satisfying: when no return person exists in the terminal voltage calling, the terminal voltage value is zero, or the terminal voltage value is not more than 132, the power failure is considered to be effective; when the power failure is effective, entering the next step, otherwise ending;
316) when the power is effectively cut off, the power is marked to be cut off and is brought into the power failure analysis unit.
As a preferable technical means: before the low-voltage branch line power failure research and judgment, judging whether to research and judge the low-voltage branch line power failure or not, wherein the conditions for the power failure research and judgment are as follows: under the conditions that a non-transformer area is powered off, a non-public transformer terminal is powered off, and an I-type concentrator is powered off but the power failure of the transformer area is eliminated; and the power failure research and judgment of the low-voltage branch line is triggered only when terminals or meter active events exist in 2 levels below the low-voltage branch line.
As a preferable technical means: when the low-voltage branch line is researched and judged, distinguishing an I-type concentrator platform area and a II-type concentrator platform area; aiming at the II type concentrator platform area, a mode of calling and measuring all phase voltage A of the II type concentrator is adopted; taking the power failure event and the call event information as a basis for power failure research and judgment; when the number of the subordinate level units of the low-voltage branch line exceeds 3, three subordinate level unit devices are taken, for example, less than 3 devices which take all level units are taken.
As a preferable technical means: in step 3), the low-voltage branch line research and judgment comprises the following steps:
31) the master station has a II type concentrator and a meter which actively report events, and directly judges that power failure occurs;
32) judging an I type concentrator area or an II type concentrator area; step 37) if the type I concentrator area is the type II concentrator area, step 33) is performed;
33) calling a II-type concentrator which is not reported and powered off under the low-voltage branch line;
34) judging whether the II type concentrator has power failure;
when the phase voltage of the A phase of the II type concentrator is 0 or less than 132V, the power failure is detected; judging that the II type concentrator is powered off if the A phase voltage of the II type concentrator cannot be called;
35) when the II type concentrator is not powered off, judging whether the low-voltage branch line is powered off or not; when judging whether the low-voltage branch line has power failure, determining a subordinate level unit, wherein the subordinate level unit is a building, and if no building unit exists, the subordinate level unit can be a meter box; when more than 3 level units exist, 3 concentrators are needed or at least the concentrators belong to 3 next level units to judge power failure; if the number of the hierarchy units is less than 3, all the concentrators are required to judge power failure; if all concentrators are less than 2, the 1 table needs to be tested again for confirmation;
36) when the low-voltage branch line is powered off, confirming that the low-voltage branch line is powered off;
37) judging whether 3 or more subordinate level units exist; if not, judging all unit random notations of the next level; if yes, entering step 38) to judge 3 next-level unit random records;
38) studying and judging 3 next-level unit random notations; when the electric meter has an event priority event, if no active event exists, the voltage of the phase A needs to be called up and tested; when the voltage of the meter A phase is 0 or less than 132V, or the voltage of the meter A phase can not be called as power failure;
39) and confirming the power failure of the low-voltage branch line.
Has the advantages that:
according to the power supply relation of the low-voltage branch line, the distribution conditions of an I-type concentrator, an II-type concentrator and a meter of the low-voltage branch line, power failure events of relevant equipment and relevant data are combined, the failure judgment is reduced by researching the judgment basic trigger condition of the low-voltage branch line, the efficiency is improved, the display condition of the power failure information of a main station in different acquisition schemes in the low-voltage branch line is researched, and a practical, accurate and rapid comprehensive low-voltage branch line power failure research and judgment method is established.
Secondly, the technical scheme simultaneously solves the following problems
1. The problem of judging the power failure of the low-voltage branch line under different acquisition schemes is solved;
2. the method solves the problems of how to combine and use different power failure data sources, effectively utilizes the active power failure event and the power failure calling and measuring result, effectively utilizes the terminal and the meter active power failure event, and improves the accuracy and the real-time performance of the research and judgment of the power failure of the low-voltage branch line;
3. the problem that data sources under partial low-voltage branch lines are too few to lead to incapability of studying and judging is solved.
Drawings
FIG. 1 is a flow chart of the present invention.
Fig. 2 is a flow chart of the terminal power failure study and judgment of the present invention.
FIG. 3 is a flow chart of the power failure analysis of the meter of the present invention.
Fig. 4 is a second flow chart of the present invention.
Detailed Description
The technical scheme of the invention is further explained in detail by combining the drawings in the specification.
The first embodiment is as follows:
as shown in fig. 1, the present invention comprises the steps of:
1) storing information of the low-voltage branch lines, combing and summarizing the distribution conditions of the low-voltage branch lines, the concentrator and the meter under each acquisition scheme, and confirming the subordination relation between the concentrator and the meter;
2) receiving a terminal and a meter event, and starting to judge whether the low-voltage branch line has power failure or not under the condition of confirming that the non-station area has power failure;
3) judging whether more than 2 lower-level power failure data sources below the low-voltage branch line appear; if yes, carrying out multi-type power failure data combination study and judgment on the concentrator and the meter; if not, performing subordinate level power failure research and judgment according to the subordinate relation between the concentrator and the meter; the subordinate level unit is a building or a meter box;
when the multi-type power failure data combination of the concentrator and the meter is researched and judged:
a) the method comprises the steps that a subordinate relation between a terminal and a meter is combined, existing power failure events of lower levels of a low-voltage branch line are researched and judged, active power failure events are preferentially used, and when a II-type concentrator and the meter which actively report the power failure events exist in a master station, the master station directly judges that power failure occurs, so that the number of times of calling the meter is reduced;
b) When the master station does not have the II-type concentrator to actively report the power failure event, all the II-type concentrators call for the A-phase voltage;
c) when the number of the II-type concentrators below the low-voltage branch line is less than 3, other n tables of the subordination relation of the II-type concentrators which are not powered off are called up and tested at random, wherein the number of n depends on the number of the II-type concentrators which are not powered off;
d) when more than three next-level reported power failure events exist below the low-voltage branch line, 3 different terminals or meters of the attribution level are needed to study and judge the power failure condition; if the number of the terminals is less than 3, all terminals or meters belonging to the hierarchy need to be powered off;
4) if the multi-type power failure data combination of the concentrator and the meter is researched and judged, the low-voltage branch power failure is confirmed, and if not, the subordinate level power failure is researched and judged according to the subordinate relation of the concentrator and the meter;
5) and confirming the power failure condition of the low-voltage branch line according to the power failure research and judgment condition.
According to the technical scheme, the power failure items of the transformer area are eliminated, the occurrence of misjudgment is prevented, and the power failure research and judgment speed is increased; meanwhile, after the power failure in the transformer area is researched and judged, whether more than 2 lower-level power failure data sources under the low-voltage branch line exist is judged; if yes, carrying out multi-type power failure data combination study and judgment on the concentrator and the meter; if not, performing subordinate level power failure research and judgment according to the subordinate relation between the concentrator and the meter; and the condition of missing judgment is prevented.
The research and judgment of the power failure of the low-voltage branch line is carried out, the research and judgment should be carried out by combining the subordination relation between the terminal and the meter and the existing power failure events of the lower level of the low-voltage branch line, the active power failure events can be used as far as possible, and the times of calling the meter are reduced.
When more than three next levels (meter boxes or buildings) exist under the low-voltage branch line, 3 terminals or meter meters of different attributive levels are needed to study and judge power failure conditions (support events and summons and measurement results), and if the number of the terminals or meter meters is less than 3, the terminals or meter meters of all levels (1-2) are needed to study and judge power failure conditions. Effectively preventing the conditions of missed checking and wrong checking.
For the study and judgment of the power failure event, firstly, the confirmation and judgment of the terminal and the meter are divided, in the step 3), the study and judgment of the power failure event comprises the study and judgment of the power failure event of the terminal and the meter, as shown in fig. 2, the study and judgment of the power failure event of the terminal comprises the following steps:
301) acquiring a power failure event reported by a terminal;
302) judging whether a simultaneous section power failure record exists or not; if yes, ending; if not, entering the next step;
303) judging whether a marketing in-transit replacement process is in progress; if yes, ending; if not, entering the next step;
304) judging the blacklist, namely judging that the terminal belongs to the blacklist, if so, only processing the first report of the terminal on the same day, and counting the reporting times;
305) judging and correcting time validity, and taking the current time of the system as the power failure time by aiming at the terminal with the alarm time being empty or the time lagging the system time or the alarm time 3 days before, and correcting the current time to be valid; the others are effective, and the time of reporting the event is taken as the standard;
306) calling and testing the phase voltage of the terminal A;
307) whether power failure carries out validity analysis, when satisfying: when the terminal voltage is called for and has no return person, the terminal voltage value is zero, or the terminal voltage value is not more than 132, the power failure is considered; when the power failure is effective, entering the next step, otherwise, ending;
308) and the terminal reports the power failure event.
As shown in fig. 3, the power failure event analysis and determination of the meter includes the steps of:
311) acquiring a power failure event reported by a collector or a meter through a terminal;
312) judging whether a simultaneous section power failure record exists or not; if not, carrying out blacklist judgment, and if not, directly ending;
313) judging a blacklist, judging whether reporting equipment belongs to the blacklist, and if so, only processing the equipment to report for the first time on the same day;
314) judging and correcting time validity, and taking the current time of the system as the power failure time for the terminal with the alarm time being empty or the time lagging the system time; judging the alarm time before 3 days to be invalid, confirming false alarm, and eliminating power failure in the existing time period; others are effective;
315) whether power failure carries out validity analysis, when satisfying: when no return person exists in the terminal voltage calling, the terminal voltage value is zero, or the terminal voltage value is not more than 132, the power failure is considered to be effective; when the power failure is effective, entering the next step, otherwise, ending;
316) when the power is effectively cut off, the power is marked to be cut off and is brought into the power failure analysis unit.
Judging whether to research and judge whether to perform power failure of the low-voltage branch line or not, wherein the following conditions are adopted:
when power failure of the transformer area is eliminated, power failure of the non-public transformer terminal is eliminated, and power failure of the I-type concentrator is eliminated
The research and judgment are triggered only when terminals or meter active events exist at 2 levels below the low-voltage branch line.
Effectively improve the processing speed and reduce the memory expenditure.
Example two:
when the low-voltage branch line is researched and judged, distinguishing an I-type concentrator platform area and a II-type concentrator platform area; aiming at the II type concentrator platform area, a mode of calling and measuring all phase voltage A of the II type concentrator is adopted; taking the power failure event and the call event information as a basis for power failure research and judgment; when the number of the subordinate level units of the low-voltage branch line exceeds 3, three subordinate level unit devices are taken, for example, less than 3 devices which take all level units are taken. As shown in fig. 4, in step 3), the low voltage branch line evaluation includes the steps of:
31) the master station has a II type concentrator and a meter which actively report events, and directly judges that power failure occurs;
32) judging an I type concentrator area or an II type concentrator area; step 37) if the type I concentrator area is the type II concentrator area, step 33) is performed;
33) calling a II-type concentrator which is not reported and powered off under the low-voltage branch line;
34) judging whether the II type concentrator has power failure;
when the phase voltage of the A phase of the II type concentrator is 0 or less than 132V, the power failure is detected; judging that the II type concentrator is powered off if the A phase voltage of the II type concentrator cannot be called;
35) when the II type concentrator is not powered off, judging whether the low-voltage branch line is powered off or not; when judging whether the low-voltage branch line has power failure, determining a subordinate level unit, wherein the subordinate level unit is a building, and if no building unit exists, the subordinate level unit can be a meter box; when more than 3 level units exist, 3 concentrators are needed or at least the concentrators belong to 3 next level units to judge power failure; if the number of the hierarchy units is less than 3, all the concentrators are required to judge power failure; if all concentrators are less than 2, the 1 table needs to be tested again for confirmation;
36) when the low-voltage branch line is powered off, confirming that the low-voltage branch line is powered off;
37) judging whether 3 or more subordinate level units exist; if not, judging all unit random notations of the next level; if yes, entering step 38) to judge 3 next-level unit random records;
38) studying and judging 3 next-level unit random notations; when the electric meter has an event priority event, if no active event exists, the voltage of the phase A needs to be called up and tested; when the voltage of the A phase of the meter is 0 or less than 132V, or the voltage of the A phase of the meter is not called as power failure;
39) and confirming power failure of the low-voltage branch line.
The method for studying and judging the power failure of the low-voltage branch line based on the multi-source power failure event shown in fig. 1 to 4 is a specific embodiment of the present invention, already embodies the substantial features and the progress of the present invention, and can make equivalent modifications in the aspects of shape, structure and the like according to the practical use requirements and under the teaching of the present invention, and the method is within the protection scope of the present scheme.
Claims (6)
1. A low-voltage branch line power failure research and judgment method based on a multi-source power failure event is characterized by comprising the following steps:
1) storing information of the low-voltage branch lines, combing and summarizing the distribution conditions of the low-voltage branch lines, the concentrator and the meter under each acquisition scheme, and confirming the subordination relation between the concentrator and the meter;
2) receiving a terminal and a meter event, and starting to judge whether the low-voltage branch line has power failure or not under the condition of confirming that the non-station area has power failure;
3) judging whether more than 2 lower-level power failure data sources below the low-voltage branch line appear; if yes, carrying out multi-type power failure data combination study and judgment on the concentrator and the meter; if not, performing subordinate level power failure research and judgment according to the subordinate relation between the concentrator and the meter; the subordinate level unit is a building or a meter box;
when the multi-type power failure data combination of the concentrator and the meter is researched and judged:
a) the method comprises the steps that a subordinate relation between a concentrator and a meter is combined with an existing power failure event of a lower level of a low-voltage branch line for studying and judging, an active power failure event is used firstly, and when a II-type concentrator and a meter which actively report the power failure event exist in a master station, the power failure is directly judged to be power failure, so that the number of times of calling the meter is reduced;
b) When the master station does not have the II-type concentrator to actively report the power failure event, all the II-type concentrators call for the A-phase voltage;
c) when the number of the II-type concentrators below the low-voltage branch line is less than 3, other n tables of the subordination relation of the non-powered II-type concentrators need to be recalled and tested at random, wherein the number of n depends on the number of the non-powered II-type concentrators;
d) when more than three next-level reported power failure events exist below the low-voltage branch line, 3 different terminals or meters of the attribution level are needed to study and judge the power failure condition; if the number of the terminals is less than 3, all terminals or meters belonging to the hierarchy need to be powered off;
4) if the combined study and judgment conditions of the multi-type power failure data of the concentrator and the meter are met, determining that the low-voltage branch line has power failure, and if not, carrying out subordinate level power failure study and judgment according to the subordinate relation of the concentrator and the meter;
5) and confirming the power failure condition of the low-voltage branch line according to the power failure research and judgment condition.
2. The method for studying and judging the power failure of the low-voltage branch line based on the multi-source power failure event according to claim 1, characterized in that: in step 3), the study and judgment of the power failure event comprises the study and judgment of the power failure event of the terminal and the meter, and the study and judgment of the power failure event of the terminal comprises the following steps:
301) acquiring a power failure event reported by a terminal;
302) judging whether a simultaneous section power failure record exists or not; if yes, ending; if not, entering the next step;
303) judging whether a marketing in-transit replacement process is in progress; if yes, ending; if not, entering the next step;
304) judging the blacklist, judging whether the terminal belongs to the blacklist, if so, only processing the first report of the terminal on the same day, and counting the reporting times; if not, entering the next step;
305) judging and correcting time validity, and taking the current time of the system as the power failure time by aiming at the terminal with the alarm time being empty or the time lagging the system time or the alarm time 3 days before, and correcting the current time to be valid; the others are effective, and the time of reporting the event is taken as the standard;
306) calling and testing the phase voltage of the terminal A;
307) whether power failure carries out validity analysis, when satisfying: when the terminal voltage is recalled and tested without return, or the terminal voltage value is zero, or the terminal voltage value is not more than 132V, the power failure is considered to be effective; when the power failure is effective, entering the next step, otherwise, ending;
308) and the terminal reports the power failure event.
3. The method for studying and judging the power failure of the low-voltage branch line based on the multi-source power failure event according to claim 2, characterized in that: the power failure event study and judgment of the meter comprises the following steps:
311) acquiring a power failure event reported by a collector or a meter through a terminal;
312) judging whether a simultaneous section power failure record exists or not; if not, carrying out blacklist judgment, and if so, directly ending;
313) judging the blacklist, judging whether the reporting equipment belongs to the blacklist, if so, only processing the first reporting of the equipment on the same day; if not, entering the next step;
314) judging and correcting time validity, and taking the current time of the system as the power failure time for the terminal with the alarm time being empty or the time lagging the system time; judging the alarm time before 3 days to be invalid, confirming false alarm, and eliminating power failure in the existing time period; others are effective;
315) whether power failure carries out validity analysis, when satisfying: when the terminal voltage is recalled and tested without return, or the terminal voltage value is zero, or the terminal voltage value is not more than 132V, the power failure is considered to be effective; when the power failure is effective, entering the next step, otherwise, ending;
316) when the power is effectively cut off, the power is marked to be cut off and is brought into the power failure analysis unit.
4. The method for studying and judging the power failure of the low-voltage branch line based on the multi-source power failure event according to claim 1, characterized in that: before the low-voltage branch line power failure research and judgment, judging whether to research and judge the low-voltage branch line power failure or not, wherein the conditions for the power failure research and judgment are as follows: under the conditions that a non-transformer area is powered off, a non-public transformer terminal is powered off, and an I-type concentrator is powered off but the power failure of the transformer area is eliminated; and the power failure research and judgment of the low-voltage branch line is triggered only when terminals or meter active events exist in 2 levels below the low-voltage branch line.
5. The method for studying and judging the power failure of the low-voltage branch line based on the multi-source power failure event according to claim 1, characterized in that: when the low-voltage branch line is researched and judged, distinguishing an I-type concentrator platform area and a II-type concentrator platform area; aiming at the II type concentrator platform area, a mode of calling and measuring all phase voltage A of the II type concentrator is adopted; taking the power failure event and the call event information as a basis for power failure research and judgment; when the number of the subordinate level units of the low-voltage branch line exceeds 3, three subordinate level unit devices are taken, for example, less than 3 devices which take all level units are taken.
6. The method for studying and judging the power failure of the low-voltage branch line based on the multi-source power failure event according to claim 5, wherein the method comprises the following steps: in step 3), the low-voltage branch line research and judgment comprises the following steps:
31) the master station has a II type concentrator and a meter which actively report events, and directly judges that power failure occurs;
32) judging an I type concentrator area or an II type concentrator area; step 37) if the type I concentrator area is the type II concentrator area, step 33) is performed;
33) calling a II-type concentrator which is not reported and powered off under the low-voltage branch line;
34) judging whether the II type concentrator has power failure;
when the phase voltage of the A phase of the II type concentrator is 0 or less than 132V, the power failure is detected; judging that the II type concentrator is powered off if the A phase voltage of the II type concentrator cannot be called;
35) when the II type concentrator is not powered off, judging whether the low-voltage branch line is powered off or not; when the low-voltage branch line is judged to be powered off, determining subordinate level units, wherein the subordinate level units are buildings, and the meter boxes are meter boxes when no building unit exists; when more than 3 level units exist, 3 concentrators are needed, or at least 3 next level units are needed to judge power failure; if the number of the level units is less than 3, all the concentrators are required to judge power failure; if all concentrators are less than 2, 1 meter needs to be called again for confirmation;
36) when the low-voltage branch line is powered off, confirming that the low-voltage branch line is powered off;
37) judging whether 3 or more subordinate level units exist; if not, judging all unit random table meters of the next level; if yes, entering step 38) to judge 3 next-level unit random meters;
38) studying and judging 3 next-level unit random meters; when the electric meter has an event, the event is prioritized, if no active event exists, the A-phase voltage needs to be called and tested; when the voltage of the A phase of the meter is 0 or less than 132V, or the voltage of the A phase of the meter is not called as power failure;
39) and confirming the power failure of the low-voltage branch line.
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| CN112444687A (en) * | 2019-08-29 | 2021-03-05 | 北京科东电力控制***有限责任公司 | Effective power failure event studying and judging method and device |
| CN111142047B (en) * | 2019-12-31 | 2022-05-27 | 国网河北省电力有限公司 | Automatic studying and judging method based on power distribution internet of things power failure |
| CN111813824B (en) * | 2020-06-02 | 2022-09-02 | 国网江西省电力有限公司电力科学研究院 | Method and system for automatically detecting missing report of power failure event of 10kV line outgoing line |
| CN112505478A (en) * | 2020-11-17 | 2021-03-16 | 国网山东省电力公司青岛供电公司 | Non-contact type low-voltage transformer area power failure and recovery detection device and power failure and recovery detection method |
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