CN116596348A - Platform area line loss analysis method based on minute-level acquisition - Google Patents
Platform area line loss analysis method based on minute-level acquisition Download PDFInfo
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Abstract
The invention belongs to the technical field of power system district line loss analysis, and particularly relates to a district line loss analysis method based on minute-level acquisition, which comprises the steps that a data platform substitutes calculated district loss rate into a district line loss analysis module to correct, and then the data platform sorts the corrected district loss rate; compared with the prior art, the invention has the beneficial effects that: (1) Substituting the loss rate of the area into the area line loss analysis module by the data platform for correction; the correction of the area loss rate by the area line loss analysis module comprises the correction of the area loss rate according to the service life of the area wire, the area position and the management standard degree; (2) The technical reasons and management reasons affecting the line loss rate of the transformer area are comprehensively considered by the transformer area line loss analysis module for correcting the transformer area loss rate, so that the correction of the transformer area loss rate is quite reasonable, and a power supply company can comb the transformer area with illegal power consumption and illegal power stealing.
Description
Technical Field
The invention belongs to the technical field of power system transformer area line loss analysis, and particularly relates to a transformer area line loss analysis method based on minute-level acquisition.
Background
The illegal electricity consumption and the electricity stealing phenomenon occur in the power supply process of the power supply company, so that the normal power supply order is disturbed, and the power grid operation and the personal safety of users are seriously threatened. In order to maintain normal power supply order and ensure legal rights and interests of power supply enterprises, the power supply enterprises need to comb and attack and manage high-line-loss areas. Factors affecting the line loss rate of the transformer area mainly have two aspects, namely technical reasons and management reasons.
The technical reasons include that (1) a power supply is not positioned in a load center, a line erection position is not matched with a power supply area, the power supply radius is too large, and the power supply is too long, so that the damaged electric quantity is increased; (2) The electricity consumption requirement is continuously increased, the section of the line wire erected in the earlier stage can not meet the requirement, and larger electric quantity loss is caused; (3) the transformer in the transformer area is a backward transformer with high energy consumption; (4) The rural area electricity consumption customers are scattered, the power supply line is long, the line diameter is small, the customer load is light, and the line loss of the transformer area is high.
Common factors for managing line loss include (1) archive factors, non-correspondence of user-transformer relationship, inconsistent information of basic archive of a marketing business system and inconsistent multiplying power of an electric energy meter in the marketing business system and inconsistent multiplying power of a total transformer at a gateway and error multiplying power; (2) The statistical factors, although the current user meter is fully covered, due to the influence of various reasons such as line maintenance, power failure and the like, the total table still exists in different periods with the electric quantity of the user electric energy meter, and the electric energy meter is super-capacity; (3) Metering factors, failure of acquisition equipment, failure of a user transformer, failure of a user electric energy meter, unreasonable configuration of the transformer and wiring error of the electric energy meter; (4) Collecting factors, namely collecting and identifying a user electric energy meter, wherein parameters of a platform region collecting device are set incorrectly, and the electricity consumption of a photovoltaic power generation user is collected incorrectly; (5) factor of stealing electricity, illegal electricity consumption of users, electricity stealing and the like; (6) Other factors, because the staff cannot manage and maintain the system in place in daily life, the line contradiction exists, so that the line in the transformer area is leaked; the flow of the reporting user is not filed timely, so that errors occur in electric quantity statistics.
As described above, in the prior art, there are many factors that affect line loss analysis and management, and affect the power supply company to comb the areas where illegal power consumption and illegal power consumption occur, so a method for analyzing sectional line loss is urgently needed, which is convenient for the power supply company to accurately locate the illegal power consumption user, and improves the anti-electricity-stealing striking efficiency.
Disclosure of Invention
Aiming at the problems, the invention provides a method for analyzing the line loss of a platform area based on minute-level acquisition.
In order to achieve the above purpose, the invention adopts the following technical scheme: a method for analyzing line loss of a platform area based on minute-level acquisition comprises the following steps:
firstly, respectively installing sensing terminals in a plurality of metering boxes of a platform area, wherein the sensing terminals support minute-level electric quantity reporting; a concentrator is also installed in the platform area, and the concentrator supports the freezing of minute-level electric quantity data;
step two, automatically reporting minute-level frozen electric quantity data to a data platform by a concentrator in the platform area, wherein the data platform comprises a database, and automatically storing the power supply quantity and the sales electric quantity of each meter per minute into the database by the data platform; the database also stores the position of each station area, the start or reconstruction date of the station area, the station area manager numbers corresponding to the station area and the theoretical values of the aluminum wire loss of different service years;
step three, the data platform calculates the line loss of the platform area in a segmented manner to obtain the loss rate of the platform area;
the data platform comprises a platform area line loss analysis module which is in communication connection with the database, and the data platform substitutes the platform area loss rate calculated in the third step into the platform area line loss analysis module for correction; the correction of the area loss rate by the area line loss analysis module comprises the correction of the area loss rate according to the service life of the area wire, the area position and the management standard degree;
and fifthly, sorting the corrected area loss rate by the data platform, carding out the sections of the areas possibly with illegal power utilization or electricity stealing phenomena, and further carding out the areas possibly with illegal power utilization or electricity stealing phenomena.
Preferably, the step three is a calculation process of the area loss rate of the station, which is as follows: sum of power supply amounts of each section of the station area minus sum of sales amounts = loss amounts, sum of loss amounts/power supply amounts = station area loss rate.
Preferably, the service life of the district conductor is in the range of 0 to 30 years; the location of the district includes mountain villages, rural areas, suburbs and cities; the standard of the management specification degree is that each zone manager manages three zones.
Preferably, the transformer area line loss analysis module takes the line loss of the transformer area transformer at the middle position of the line as a line loss reference value, and firstly obtains the actual position of the transformer area transformer in the line through a database; then calculating the ratio of the line loss to the reference value of the line loss when the transformer is in the actual position of the transformer area; and then correcting the line loss data according to the proportion.
Preferably, in the calculation process of the theoretical values of the aluminum wire losses in different service years, the thickness of the oxide film on the surface of the aluminum wire which is just used is set to be 1 micron, the thickness of the oxide film on the surface of the aluminum wire which is used for 30 years is set to be 30 microns, and the growth speed of the oxide film on the surface of the aluminum wire is in direct proportion to the service years; and then calculating the actual conductive areas and the resistances of the aluminum wires with different service ages, and finally obtaining the theoretical values of the wire losses of the aluminum wires with different service ages.
Preferably, in the process of correcting the area loss rate by the area line loss analysis module, the actual service life of the area wire is obtained through a database by taking the line loss theoretical value of the aluminum wire which is used for 15 years as a reference, and if the actual service life of the aluminum wire is less than 15 years, the area loss rate is adjusted upwards according to the difference proportion of the aluminum wire line loss theoretical value; if the actual service life of the aluminum wire is longer than 15 years, the zone loss rate is adjusted downwards according to the gap proportion of the theoretical value of the aluminum wire loss.
Preferably, the stage area in the third step includes a total table-branch, a branch-table box, a table box-household table and a total table-household table.
Preferably, when the location of the transformer area is mountain village, the actual location of the transformer area in the line deviates most from the middle location; when the transformer area position is city, the actual position of transformer in the line deviates the middle position to the minimum; and when the position of the station area is mountain village, the station area line loss analysis module adjusts the station area loss rate obtained by calculation in the step three to the maximum.
Preferably, when the management standard degree is lower than the standard, the station area line loss analysis module adjusts the station area loss rate calculated in the third step by a certain proportion.
Preferably, the sensing terminal is an intelligent sensing terminal with a carrier module, and the concentrator is an I-type concentrator.
Compared with the prior art, the invention has the advantages and positive effects that:
(1) Substituting the calculated area loss rate into an area line loss analysis module by the data platform for correction; the correction of the area loss rate by the area line loss analysis module comprises the correction of the area loss rate according to the service life of the area wire, the area position and the management standard degree;
(2) The district line loss analysis module comprehensively considers the technical reasons and management reasons affecting the district line loss rate, and is quite reasonable for correcting the district loss rate, so that a power supply company can comb the illegal power utilization and power stealing current district conveniently;
(3) The database of the data platform stores the position of each platform region, the start or reconstruction date of the platform region, the manager number of the platform region corresponding to the platform region, the theoretical value of the aluminum line loss of different service years and the like, and is convenient for the platform region line loss analysis module to call;
(4) The data platform sorts the corrected loss rate of the areas, and further combs out the sections of the areas which may have illegal electricity use or electricity theft.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the following description of the embodiments will briefly describe the drawings that are required to be used in the description:
fig. 1 is a schematic diagram of a method for analyzing line loss of a platform based on minute-level acquisition according to embodiment 1.
Detailed Description
In order that the above objects, features and advantages of the invention will be more clearly understood, a further description of the invention will be rendered by reference to the appended drawings and examples.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as described herein, and therefore the present invention is not limited to the specific embodiments of the disclosure that follow.
Example 1
The invention is further described below with reference to fig. 1, and a method for analyzing line loss of a platform area based on minute-level acquisition, as shown in fig. 1, includes the following steps:
firstly, respectively installing sensing terminals in a plurality of metering boxes of a station area, wherein the sensing terminals support minute-level electric quantity reporting; a concentrator is also arranged in the station area and supports the freezing of minute-level electric quantity data;
step two, automatically reporting minute-level frozen electric quantity data to a data platform by a concentrator in a platform area, wherein the data platform comprises a database, and automatically storing the power supply quantity and the sales electric quantity of each meter per minute into the database by the data platform; the database also stores the position of each station area, the date when the station area starts to be put into operation or rebuild, the station area manager numbers corresponding to the station area and the theoretical values of the aluminum wire loss of different service years (the aluminum wire is the aluminum wire in the steel-cored aluminum stranded wire);
step three, the data platform calculates the line loss of the platform area in a segmented manner to obtain the loss rate of the platform area;
the fourth data platform comprises a platform area line loss analysis module which is in communication connection with the database, and the data platform substitutes the calculated platform area loss rate in the third step into the platform area line loss analysis module for correction; the correction of the area loss rate by the area line loss analysis module comprises the correction of the area loss rate according to the service life of the area wire, the area position and the management standard degree;
and step five, the data platform sorts the corrected loss rate of the areas, and further combs out the areas which may have illegal electricity consumption or electricity stealing phenomena.
The sensing terminal is an intelligent sensing terminal with a carrier module, and the concentrator is an I-type concentrator. The intelligent sensing terminal is in the prior art, is arranged at the sides of the meter box and the branch box, is used for monitoring the three-phase branch box or the three-phase meter box, measures the total electricity consumption of the branch box or the meter box, measures the electric parameters such as voltage, current, power and the like, and monitors the closing and tripping states of the switch.
The calculating process of the area loss rate of the station in the third step is as follows: sum of power supply amounts of each section of the station area minus sum of sales amounts = loss amounts, sum of loss amounts/power supply amounts = station area loss rate.
The service life of the lead wire of the transformer area is in the range of 0 to 30 years (the lead wire of the transformer area needs to be replaced after being used for 30 years because of insulation problems); the location of the areas includes mountain villages, rural areas, suburban areas and cities; the standard for managing the degree of specification is that each zone manager manages three zones.
The line loss analysis module of the transformer area takes the line loss of the transformer area when the transformer area is positioned at the middle position of the line as a line loss reference value, and firstly obtains the actual position of the transformer area in the line through a database; then calculating the ratio of the line loss to the reference value of the line loss when the transformer is in the actual position of the transformer area; and then correcting the line loss data according to the proportion.
In the calculation process of the theoretical values of the aluminum wire loss of different service ages, the thickness of the surface oxide film of the aluminum wire which is just used is set to be 1 micron, the thickness of the surface oxide film of the aluminum wire which is used for 30 years is set to be 30 microns, and the growth speed of the surface oxide film of the aluminum wire is in direct proportion to the service life; and then calculating the actual conductive areas and the resistances of the aluminum wires with different service ages, and finally obtaining the theoretical values of the wire losses of the aluminum wires with different service ages.
In the correction process of the area line loss analysis module to the area loss rate, the actual service life of the area wire is obtained through a database by taking the line loss theoretical value of the aluminum line which is used for 15 years as a reference, and if the actual service life of the aluminum line is smaller than 15 years, the area loss rate is adjusted according to the difference ratio of the aluminum line loss theoretical value (the difference value of the aluminum line loss theoretical values respectively corresponding to the actual service life of the aluminum line and the service life of 15 years is divided by the reference line loss theoretical value); if the actual service life of the aluminum wire is longer than 15 years, the zone loss rate is adjusted downwards according to the gap proportion of the theoretical value of the aluminum wire loss.
The station area in the third step comprises a total table-branch, a branch-table box, a table box-household table and a total table-household table.
The location of the platform area is divided into suburbs, villages, cities and villages, and the distribution network structures are different due to different locations of the platform areas. The smaller the line loss value, the larger the transformer position in the transformer area is at the load center.
When the transformer supplies power to unidirectional load in a concentrated manner, the transformer is positioned at the end far away from the load, the load is concentrated at the end of the whole line, and the total active line loss of the whole line is P1=3I 2 R is R; when the transformer is in the middle position of the line, the transformer is changed from unidirectional power supply to bidirectional power supply, and the total active line loss of the whole line is P2=3/4I in the case of bidirectional power supply 2 R, that is to say the total active line loss of the bi-directional power supply line, is one quarter of that of the unidirectional power supply.
The transformer area line loss analysis module takes line loss (the situation that the transformer area line loss is the smallest and the transformer area in the city mostly belongs to) when the transformer is positioned at the middle position of the line or the load as a line loss reference value, and firstly, the actual position of the transformer in the transformer area in the line is obtained through a database; then calculating the ratio of the line loss to the reference value of the line loss when the transformer is in the actual position of the transformer area; and then correcting the line loss data according to the proportion.
The 'bamboo joint method' is used in the 'analysis of comprehensive loss reduction and influence of changing power supply position on the line loss of the transformer area' to calculate the bus loss of the transformer at different nodes. When the transformer is at the middle position of the line or the load, the bus loss is minimum, but the actual transformer position is not at the middle position of the line or the load, the transformer area line loss analysis module calculates the bus loss of the transformer at the actual power supply node, and then calculates the proportion that the line loss is higher than the line loss reference value when the transformer is at the actual position of the transformer area. According to the invention, line loss data correction is carried out according to the transformer position of the transformer area, so that the practical situation of the deployment of the transformer area is met, and the reasonability of the evaluation of the transformer area is ensured.
When the position of the transformer area is mountain village, the actual position of the transformer area in the line deviates from the middle position to the maximum; when the transformer area position is city, the actual position of transformer in the line deviates the middle position to the minimum; and when the station area position is mountain village, the station area line loss analysis module adjusts the station area loss rate obtained by calculation in the step three to the maximum.
And when the management standard degree is lower than the standard, the station area line loss analysis module downwards regulates the station area loss rate calculated in the step three by a certain proportion. Because of the imbalance of regional development, management differences exist in each region, personnel allocation in developed regions is complete, and the developed regions have multiple functions. And when the management standard degree is lower than the standard, the area line loss analysis module downwards regulates the area loss rate calculated in the step three by a certain proportion, wherein the downwards regulated proportion is 0.2 percent x (the number of the areas is actually managed by one area manager per 3), and the difference of line loss data caused by different management standard degrees is considered in the area line loss analysis, so that the rationality of the area evaluation is ensured.
The station area line loss analysis module reasonably corrects the station area loss rate in the third step, so that the line loss data calculated by the stations in different areas tend to be reasonable, and the fairness of the station area line loss analysis is ensured.
In this embodiment, the service life of the wire in a suburban area is 25 years, and the corresponding area manager manages three areas, and the area loss rate calculated in the step three is 9%, so that the area line loss analysis module corrects the area loss rate. Because the station area is in suburb, the loss rate of the station area is adjusted down by 0.5%, namely the down-adjustment value is 0.045%; the service life is longer than 15 years, and the line loss data is reduced by 2% through calculation, namely, the down-regulating value is 0.18%; the area loss rate after the area correction is combined is 9% -0.045% -0.18% = 8.775%.
The present invention is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification and equivalent changes to the above-mentioned embodiments according to the technical substance of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (10)
1. The method for analyzing the line loss of the platform area based on the minute-level acquisition is characterized by comprising the following steps of:
firstly, respectively installing sensing terminals in a plurality of metering boxes of a platform area, wherein the sensing terminals support minute-level electric quantity reporting; a concentrator is also installed in the platform area, and the concentrator supports the freezing of minute-level electric quantity data;
step two, automatically reporting minute-level frozen electric quantity data to a data platform by a concentrator in the platform area, wherein the data platform comprises a database, and automatically storing the power supply quantity and the sales electric quantity of each meter per minute into the database by the data platform; the database also stores the position of each station area, the start or reconstruction date of the station area, the station area manager numbers corresponding to the station area and the theoretical values of the aluminum wire loss of different service years;
step three, the data platform calculates the line loss of the platform area in a segmented manner to obtain the loss rate of the platform area;
the data platform comprises a platform area line loss analysis module which is in communication connection with the database, and the data platform substitutes the platform area loss rate calculated in the third step into the platform area line loss analysis module for correction; the correction of the area loss rate by the area line loss analysis module comprises the correction of the area loss rate according to the service life of the area wire, the area position and the management standard degree;
and fifthly, sorting the corrected area loss rate by the data platform, carding out the sections of the areas possibly with illegal power utilization or electricity stealing phenomena, and further carding out the areas possibly with illegal power utilization or electricity stealing phenomena.
2. The method for analyzing the line loss of the station area based on the minute-level acquisition according to claim 1, wherein the calculating process of the loss rate of the station area in the third step is as follows: sum of power supply amounts of each section of the station area minus sum of sales amounts = loss amounts, sum of loss amounts/power supply amounts = station area loss rate.
3. The method for analyzing the line loss of the transformer area based on the minute-scale collection according to claim 2, wherein the service life of the transformer area wire is in the range of 0 to 30 years; the location of the district includes mountain villages, rural areas, suburbs and cities; the standard of the management specification degree is that each zone manager manages three zones.
4. The method for analyzing the line loss of the transformer area based on the minute-scale collection according to claim 3, wherein the line loss analysis module takes the line loss of the transformer area when the transformer area is positioned at the middle position of the line as a line loss reference value, and firstly obtains the actual position of the transformer area in the line through a database; then calculating the ratio of the line loss to the reference value of the line loss when the transformer is in the actual position of the transformer area; and then correcting the line loss data according to the proportion.
5. The method for analyzing the line loss of the platform area based on the minute-scale collection according to claim 3, wherein in the calculation process of the theoretical values of the line loss of the aluminum lines in different service years, the thickness of the oxide film on the surface of the aluminum line which is just used is set to be 1 micrometer, the thickness of the oxide film on the surface of the aluminum line after 30 years of use is set to be 30 micrometers, and the growth speed of the oxide film on the surface of the aluminum line is in direct proportion to the service years; and then calculating the actual conductive areas and the resistances of the aluminum wires with different service ages, and finally obtaining the theoretical values of the wire losses of the aluminum wires with different service ages.
6. The method for analyzing the line loss of the transformer area based on the minute-scale collection according to claim 5, wherein in the process of correcting the line loss rate of the transformer area by the line loss analysis module, the actual service life of the transformer area wire is obtained through a database by taking the line loss theoretical value of the aluminum wire which is used for 15 years as a reference, and if the actual service life of the aluminum wire is less than 15 years, the line loss rate of the transformer area is adjusted upwards according to the difference proportion of the line loss theoretical value of the aluminum wire; if the actual service life of the aluminum wire is longer than 15 years, the zone loss rate is adjusted downwards according to the gap proportion of the theoretical value of the aluminum wire loss.
7. The method for analyzing line loss of a station based on minute-level acquisition according to claim 2, wherein the station sections in the third step include a total table-branch, a branch-table box, a table box-household table, and a total table-household table.
8. The method for analyzing the line loss of the transformer area based on the minute-scale collection according to claim 4, wherein when the position of the transformer area is mountain village, the actual position of the transformer in the transformer area in the line deviates from the middle position to the maximum; when the transformer area position is city, the actual position of transformer in the line deviates the middle position to the minimum; and when the position of the station area is mountain village, the station area line loss analysis module adjusts the station area loss rate obtained by calculation in the step three to the maximum.
9. The method for analyzing line loss of a platform area based on minute-level collection according to claim 3, wherein when the management standard is lower than the standard, the analysis module of line loss of a platform area is used for adjusting the loss rate of the platform area calculated in the third step by a certain proportion.
10. The method for analyzing the line loss of the station area based on the minute-level acquisition according to claim 1, wherein the sensing terminal is an intelligent sensing terminal with a carrier module, and the concentrator is an I-type concentrator.
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