CN112014668A - Method for managing line loss of medium-voltage line and low-voltage transformer area of distribution network - Google Patents
Method for managing line loss of medium-voltage line and low-voltage transformer area of distribution network Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
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Abstract
The invention discloses a method for managing line loss of a medium-voltage line and a low-voltage transformer area of a distribution network, which comprises the following steps of S1, detecting a summary table: monitoring the electric quantity of the general meter, and monitoring the line loss change condition when the fluctuation is abnormal; step S2, collecting the user electricity quantity in time: the timeliness of user electric quantity collection is judged whether to influence the line loss of the low-voltage transformer area; step S3, calculating a line bundling rate: the bundling rate has influence on line loss, and is defined to be 15%; step S4, analyzing the relation between the power supply quantity and the power selling quantity: generating a daily line loss, a contour line loss and a monthly line loss report according to the relation between the power supply quantity and the power selling quantity, remarkably reflecting the sudden change of the line loss of the qualified distribution area or the line for a long time, and carrying out analysis processing and improvement in time; step S5, control principle: the line loss threshold value of the low-voltage transformer area is 0-6%, and the line loss of the line is controlled to be 0-10%. According to the invention, through data tracking, whether the total table metering is normal can be judged; by analyzing and tracking the system, the abnormal line loss fluctuation is found in time, the problem is found out, and the problem is avoided.
Description
Technical Field
The invention relates to the technical field of distribution network medium-voltage line and low-voltage transformer area line loss treatment, in particular to a method for treating the line loss of a distribution network medium-voltage line and a distribution network low-voltage transformer area.
Background
The loss reduction work is a core content of the current electric power marketing work, the loss reduction of the low-voltage distribution room, particularly, adverse factors of large radius of a power supply line, more branches, aging of a metering device, few and backward anti-electricity-theft measures and abnormal difficulty in loss reduction and control exist in vast rural areas, and the line loss rate of the low-voltage distribution room is always a difficult problem facing the electric power marketing work.
The existing low-voltage line loss analysis and search mainly depends on manual work and the whole transformer area is subjected to on-site actual meter reading and search in a general survey mode, a large amount of manual work is needed, the period is long, the meter reading and line loss analysis of one transformer area only needs five people for one week, and under the condition, the defects exist in the aspects of manpower, material resources, time period and personal safety.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for managing the line loss of a medium-voltage line and a low-voltage transformer area of a distribution network, which solves the problems that the prior low-voltage line loss analysis and search mainly depends on manual work and the actual meter reading and search of the whole transformer area on site in a general survey mode, not only a large amount of manual work is needed, but also the period is long, only one transformer area needs to be copied and analyzed by the line loss, five persons are needed for one week, and no matter in the situation, the defects exist in the aspects of manpower, material resources, time period and personal safety.
In order to achieve the purpose, the invention is realized by the following technical scheme: a method for managing line loss of a medium-voltage line and a low-voltage transformer area of a distribution network comprises the following steps:
step S1, detection summary table: monitoring the electric quantity of the general meter, and monitoring the line loss change condition when the fluctuation is abnormal;
step S2, collecting the user electricity quantity in time: the timeliness of user electric quantity collection is judged whether to influence the line loss of the low-voltage transformer area;
step S3, calculating a line bundling rate: the bundling rate has influence on line loss, and is defined to be 15%;
step S4, analyzing the relation between the power supply quantity and the power selling quantity: generating a daily line loss, a contour line loss and a monthly line loss report according to the relation between the power supply quantity and the power selling quantity, remarkably reflecting the sudden change of the line loss of the qualified distribution area or the line for a long time, and carrying out analysis processing and improvement in time;
step S5, control principle: the line loss threshold value of the low-voltage transformer area is 0-6%, and the line loss of the line is controlled to be 0-10%.
Optionally, in the step S1, in the detecting of the summary table, the time-interval electric quantity of the summary table is detected, the time-interval electric quantity of the summary table is sequentially recorded, a table is drawn according to time and the summary table electric quantity, the change condition of the summary table electric quantity in the adjacent time interval is analyzed and judged, the difference of the summary table electric quantity in the adjacent time interval is drawn into a secondary table, the power consumption condition in each time interval is analyzed according to the line segment trend, the power consumption trend in each time interval in the last year is compared with the line segment trend of the drawn table, the power consumption condition in the same time interval is analyzed, the abnormal condition of the power consumption in the time interval is judged, the power consumption condition in the time interval is contrasted and predicted, the three are contrasted and analyzed, whether the abnormal change of the power consumption occurs in the time interval.
Optionally, step S2, in collecting the user' S electric quantity in time, detect that the multifunctional electric meter has no damage, and zero calibration or maintenance processing to damaging the multifunctional electric meter, guarantee that the multifunctional electric meter is in normal operating condition, the electric quantity that this multifunctional electric meter consumed in each period of time of in time recording, and summarize each multifunctional electric meter power consumption in this period of time, produce the form with period nature and power consumption, the total table electric quantity change situation of contrast, judge the total table and the branch table power consumption change situation of while, and circuit transmission distance nature, will produce the period deviation, judge adjacent period power consumption situation, judge whether timeliness of electric quantity collection causes the influence to low-voltage table district line loss, and the range of change, thereby judge under the same period, the circuit loss situation and the time of consumption, ensure the accuracy of electric quantity data collection.
Optionally, in the step S3, in calculating the line bundling rate, the look-up table and the summary table are checked, the number of each line, the bundling number and the bundling distance of the corresponding line are recorded, the bundling number of each line is summarized, the total length of the bundling distance of the line is calculated, the resistance of the bundling distance under the same voltage is calculated according to the total length of the line bundling distance, the resistance of the original line is compared, the power loss generated by the line is calculated, the bundling rate of each line is analyzed, and the power loss of the circuit passing through each line is analyzed.
Optionally, in the step S4, analyzing the relationship between the power supply amount and the power selling amount, comparing the total table power supply amount data recorded in the step S1 and the step S2 with the sub-table power selling amount, respectively making daily line loss, weekly line loss and monthly line loss reports, sequentially comparing the data difference between the total table power supply amount and the sub-table power supply amount in the same time period of the daily line loss, weekly line loss and monthly line loss reports, and analyzing the sudden change of the long-term qualified station area or line loss, thereby timely overhauling the sub-table and the corresponding line.
Optionally, in the step S5 and the control principle, the daily line loss, the cycle line loss and the monthly line loss report in the step S4 are counted, the bundling rate and the electric energy loss generated by the line in the step S3 are compared, the line loss threshold of the low-voltage distribution room, the line loss data and the variation condition of the line are calculated, the line loss threshold of the low-voltage distribution room and the line loss of the line are controlled at the same time, the line loss threshold of the low-voltage distribution room and the line loss of the line are compared with the standard value in the same time period, the standard value range is 0-6% of the line loss threshold of the low-voltage distribution room, and the line loss of the line is controlled at.
The invention provides a method for managing line loss of a medium-voltage line and a low-voltage transformer area of a distribution network, which has the following beneficial effects: .
Whether the total meter metering is normal can be judged through data tracking; by analyzing and tracking the system, the abnormal line loss fluctuation is found in time, the problem is found out, and the problem is avoided; the line loss fluctuation trend can be visually seen, and macroscopic control is facilitated.
Drawings
Fig. 1 is a flowchart of a method for managing line loss of a medium-voltage line and a low-voltage transformer area in a distribution network according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, the present invention provides a technical solution: a method for managing line loss of a medium-voltage line and a low-voltage transformer area of a distribution network comprises the following steps:
step S1, detection summary table: monitoring the electric quantity of the general meter, and monitoring the line loss change condition when the fluctuation is abnormal;
step S2, collecting the user electricity quantity in time: the timeliness of user electric quantity collection is judged whether to influence the line loss of the low-voltage transformer area;
step S3, calculating a line bundling rate: the bundling rate has influence on line loss, and is defined to be 15%;
step S4, analyzing the relation between the power supply quantity and the power selling quantity: generating a daily line loss, a contour line loss and a monthly line loss report according to the relation between the power supply quantity and the power selling quantity, remarkably reflecting the sudden change of the line loss of the qualified distribution area or the line for a long time, and carrying out analysis processing and improvement in time;
step S5, control principle: the line loss threshold value of the low-voltage transformer area is 0-6%, and the line loss of the line is controlled to be 0-10%.
In the invention: step S1, in the detecting summary table, detecting the time-interval electric quantity of the summary table, recording the electric quantity of the summary table in each time interval in sequence, drawing a table according to the time and the electric quantity of the summary table, analyzing and judging the electric quantity change condition of the summary table in the adjacent time interval, drawing a secondary table according to the difference of the summary table in the adjacent time interval, analyzing the electric consumption condition of each time interval according to the line segment trend, comparing the electric consumption trend of each time interval in the last year with the line segment trend of the drawing table, analyzing the electric consumption condition in the same time interval, judging the abnormal condition of the electric consumption in the time interval, comparing and predicting the electric consumption condition in the time interval, comparing and analyzing the three, judging whether the abnormal change of the electric consumption occurs in the time interval, the change amplitude of the electric consumption, and analyzing.
In the invention: step S2, in collecting user electric quantity in time, detecting whether the multifunctional electric meter is damaged, zero calibration or maintenance treatment is carried out on the damaged multifunctional electric meter, the multifunctional electric meter is ensured to be in a normal operation state, the electric quantity consumed by the multifunctional electric meter in each time interval is recorded in time, the electric quantity consumed by each multifunctional electric meter in each time interval is summarized, tables are made according to the time intervals and the electric quantity consumed, the change condition of the electric quantity of the total table is compared, the change condition of the electric quantity of the total table and the electric quantity consumed by the branch table in the same time interval is judged, circuit transmission distance is obtained, time interval deviation is generated, the condition of the electric quantity consumed in adjacent time intervals is judged, whether the timeliness of electric quantity collection influences line loss of a low-voltage station area or not is judged, and the change range.
In the invention: and step S3, in the step of calculating the line bundling rate, checking the lines used by the branch table and the summary table, recording the mark number of each line, the bundling number and the bundling distance of the corresponding marked line, summarizing the bundling number of each marked line, calculating the total length of the bundling distance of the marked line, calculating the resistance of the bundling distance under the same voltage according to the total length of the line bundling distance, comparing the resistance of the original marked line, calculating the electric energy loss generated by the marked line, and further analyzing the bundling rate of each marked line and the electric energy loss of the circuit passing through each marked line.
In the invention: and step S4, in the analysis of the relation between the power supply quantity and the power selling quantity, comparing the total meter power supply quantity data recorded in the step S1 and the step S2 with the sub-meter power selling quantity, respectively making daily line loss, weekly line loss and monthly line loss reports, sequentially comparing the data difference of the total meter power and the sub-meter power in the same time period of the daily line loss, the weekly line loss and the monthly line loss reports, and analyzing the sudden change of the long-term qualified transformer area or line loss, thereby timely overhauling the sub-meter and the corresponding line.
In the invention: step S5, in a control principle, daily line loss, contour line loss and monthly line loss reports in the step S4 are counted, the bundling rate and the electric energy loss generated by the line in the step S3 are compared, a low-voltage transformer area line loss threshold value, line loss data and change conditions are calculated, the low-voltage transformer area line loss threshold value and line loss are controlled at the same time, the low-voltage transformer area line loss threshold value and the line loss are compared with a standard value in the same time period, the standard value range is 0-6% of the low-voltage transformer area line loss threshold value, and the line loss is controlled at 0-10%.
In conclusion, the method for managing the line loss of the medium-voltage line and the low-voltage transformer area of the distribution network comprises the following steps: step one, detecting the periodic electric quantity of a master meter, sequentially recording the electric quantity of the master meter of each period, drawing a table according to time and the electric quantity of the master meter, analyzing and judging the change condition of the electric quantity of the master meter of adjacent periods, drawing a secondary table according to the difference of the electric quantity of the master meter of adjacent periods, analyzing the power consumption condition of each period according to the line segment trend, comparing the power consumption trend of each period of the last year with the line segment trend of the drawn table, analyzing the power consumption condition of the same period, judging the abnormal condition of the power consumption of the period, comparing and predicting the power consumption condition of the period, and analyzing the three to judge whether the abnormal change of the power consumption occurs in the period and the change amplitude of the power consumption and simultaneously analyze the line loss change condition when the fluctuation is abnormal; step two, detecting whether the multifunctional ammeter is damaged or not, performing zero calibration or maintenance treatment on the damaged multifunctional ammeter to ensure that the multifunctional ammeter is in a normal operation state, recording the electric quantity consumed by the multifunctional ammeter in each time period in time, summarizing the electric consumption of the multifunctional ammeter in the time period, making a table according to the time period and the electric consumption, comparing the change condition of the electric quantity of the total table, judging the change condition of the electric consumption of the total table and the sub-table in the same time period, generating time period deviation, judging the electric consumption condition of adjacent time periods, judging whether the timeliness of electric quantity collection influences line loss of a low-voltage station area or not, and judging the change amplitude, thereby judging the line circuit loss condition and the consumed time in the same time period, and ensuring the accuracy of electric quantity data collection; checking the lines used by the branch table and the summary table, recording the number of each line, the bundling number and the bundling distance of the corresponding marked line, summarizing the bundling number of each marked line, calculating the total length of the bundling distance of the marked line, calculating the resistance of the bundling distance under the same voltage according to the total length of the bundling distance of the line, comparing the resistance of the original marked line, calculating the electric energy loss generated by the marked line, and further analyzing the bundling rate of each marked line and the electric energy loss of the circuit passing each marked line; comparing the total meter power supply quantity data recorded in the first step and the second step with the sub-meter sold power quantity, respectively making daily line loss, contour line loss and monthly line loss reports, sequentially comparing the data difference of the total meter power quantity and the sub-meter power quantity and the circuit loss and consumed time in the same time period of the daily line loss, contour line loss and monthly line loss reports, and analyzing the sudden change of the long-term qualified transformer area or the line loss of the circuit, thereby timely overhauling the sub-meters and the corresponding circuits; step five, in the control principle of the step S5, daily line loss, contour line loss and monthly line loss reports in the step S4 are counted, the bundling rate and the electric energy loss generated by the line in the step S3 are compared, a low-voltage transformer area line loss threshold value, line loss data and the change condition are calculated, the low-voltage transformer area line loss threshold value and the line loss are controlled at the same time, the low-voltage transformer area line loss threshold value and the line loss are compared with the standard value in the same time period, the standard value range is 0-6% of the low-voltage transformer area line loss threshold value, and the line loss is controlled at 0-10%.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (6)
1. A method for managing line loss of a medium-voltage line and a low-voltage transformer area of a distribution network is characterized by comprising the following steps:
step S1, detection summary table: monitoring the electric quantity of the general meter, and monitoring the line loss change condition when the fluctuation is abnormal;
step S2, collecting the user electricity quantity in time: the timeliness of user electric quantity collection is judged whether to influence the line loss of the low-voltage transformer area;
step S3, calculating a line bundling rate: the bundling rate has influence on line loss, and is defined to be 15%;
step S4, analyzing the relation between the power supply quantity and the power selling quantity: generating a daily line loss, a contour line loss and a monthly line loss report according to the relation between the power supply quantity and the power selling quantity, remarkably reflecting the sudden change of the line loss of the qualified distribution area or the line for a long time, and carrying out analysis processing and improvement in time;
step S5, control principle: the line loss threshold value of the low-voltage transformer area is 0-6%, and the line loss of the line is controlled to be 0-10%.
2. The method for managing the line loss of the medium-voltage line and the low-voltage transformer area of the distribution network according to claim 1, is characterized in that: and step S1, detecting the periodic electric quantity of the summary table, sequentially recording the electric quantity of the summary table in each period, drawing a table according to time and the electric quantity of the summary table, analyzing and judging the variation of the electric quantity of the summary table in adjacent periods, drawing a secondary table according to the difference of the total electric quantity of the summary table in adjacent periods, analyzing the electric consumption of each period according to the line segment trend, comparing the electric consumption trend of each period in the last year with the line segment trend of the drawn table, analyzing the electric consumption of the same period, judging the abnormal situation of the electric consumption of the period, comparing and predicting the electric consumption of the period, comparing and analyzing the three, judging whether the abnormal variation of the electric consumption occurs in the period, the variation amplitude of the electric consumption, and analyzing the variation of the line loss when the fluctuation is abnormal.
3. The method of claim 1, wherein: step S2, in timely collecting user' S electric quantity, it has not been damaged to detect the multifunctional electric meter, and zero calibration or maintenance processing to damaging the multifunctional electric meter, guarantee that the multifunctional electric meter is in normal operating condition, in time record the electric quantity that this multifunctional electric meter consumed in each period, and summarize each multifunctional electric meter power consumption in this period, produce the form with period nature and power consumption, contrast total table electric quantity variation, judge the total table and branch table power consumption variation of while period, and circuit transmission distance nature, will produce the period deviation, judge adjacent period power consumption condition, judge whether the timeliness of electric quantity collection causes the influence to low-voltage station district line loss, and the range of variation, thereby judge under the same period, line circuit loss condition and time of consumption, ensure the accuracy of electric quantity data collection.
4. The method of claim 1, wherein: in the step S3, in calculating the line bundling rate, the look-up table and the summary table are checked, the number of each line, the bundling number and the bundling distance corresponding to the line to be labeled are recorded, the bundling number of each line to be labeled is summarized, the total length of the bundling distance of the line to be labeled is calculated, the resistance of the bundling distance under the same voltage is calculated according to the total length of the bundling distance of the line to be labeled, the resistance of the original line to be labeled is compared, the electric energy loss generated by the line to be labeled is calculated, and then the bundling rate of each line to be labeled and the electric energy loss of the circuit passing through each line to be labeled are analyzed.
5. The method of claim 1, wherein: in the step S4, analyzing the relationship between the power supply amount and the power selling amount, comparing the total meter power supply amount data recorded in the step S1 and the sub-meter power selling amount data recorded in the step S2, respectively making daily line loss, weekly line loss and monthly line loss reports, sequentially comparing the data difference of the total meter power and the sub-meter power in the same time period of the daily line loss, the weekly line loss and the monthly line loss reports, and analyzing the sudden change of the long-term qualified transformer area or the line loss, thereby timely overhauling the sub-meter and the corresponding line.
6. The method of claim 1, wherein: in the step S5 and the control principle, statistics is performed on daily line loss, cycle line loss and monthly line loss reports in the step S4, the bundling rate and the electric energy loss generated by the line in the step S3 are compared, a low-voltage distribution room line loss threshold value, line loss data and change conditions are calculated, the low-voltage distribution room line loss threshold value and line loss are controlled simultaneously, the low-voltage distribution room line loss threshold value and the line loss are compared with a standard value in the same comparison time period, the standard value range is 0-6% of the low-voltage distribution room line loss threshold value, and the line loss is controlled at 0-10%.
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Application publication date: 20201201 |