CN110703009B - Abnormal analysis and processing method for line loss rate of transformer area - Google Patents

Abnormal analysis and processing method for line loss rate of transformer area Download PDF

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Publication number
CN110703009B
CN110703009B CN201910898758.4A CN201910898758A CN110703009B CN 110703009 B CN110703009 B CN 110703009B CN 201910898758 A CN201910898758 A CN 201910898758A CN 110703009 B CN110703009 B CN 110703009B
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line loss
loss
line
model
transformer area
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CN110703009A (en
Inventor
何立强
何立刚
赵允
葛运清
梅礼行
曹传忠
曹沐新
张振华
罗汉文
孙延栋
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State Grid Corp of China SGCC
State Grid Liaoning Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Liaoning Electric Power Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere

Abstract

The abnormal analysis and processing method for the line loss rate of the transformer area comprises the following steps: step 1, a data acquisition equipment terminal is installed at the lower end of a low-voltage side concentrator of a public transformer area based on a power line carrier principle; step 2, the electricity consumption monitoring terminal freezes various data of all single-phase and three-phase intelligent electric meters in the meter reading period and transmits the data to a server; and 3, the background analysis software analyzes the line loss of the transformer area by reading the data of the server side and constructing a line loss analysis model, automatically screens all abnormal users in the transformer area and provides a processing basis for field investigators. The method quantifies the loss electric quantity of the transformer area, defines the time period of electric quantity loss in the meter reading period, and defines whether the technical loss or the management loss is technical loss or metering failure or manual electricity stealing. The inspection range of the staff of the line loss worker is reduced, the workload is greatly reduced, and the working efficiency and the synchronous line loss treatment level are improved.

Description

Abnormal analysis and processing method for line loss rate of transformer area
Technical Field
The invention belongs to the technical field of electric power information, and particularly relates to a method for analyzing and processing line loss rate abnormity of a transformer area.
Background
When the line loss abnormality of a low-voltage transformer area is processed, the existing method judges that the line loss rate is abnormal in a meter reading period, the conditions are single, namely, the percentage of the loss electric quantity in the meter reading period to the power supply quantity is listed, the loss electric quantity is not quantitatively analyzed, the specific time period of the electric quantity loss cannot be determined, the technical loss or the management loss cannot be determined, the metering failure or the manual electricity stealing cannot be determined, and the line loss worker has high difficulty and low efficiency in the synchronous line loss abnormality processing work of the low-voltage transformer area.
Disclosure of Invention
In order to solve the problems, the method for analyzing and processing the abnormal reason of the line loss rate of the transformer area by using a big data analysis means comprises the following steps of acquiring the peak, valley and flat electric quantity of an examination and check meter and a sub meter under the transformer area by using an electric energy acquisition device under an internet + line loss mode, counting the line loss rate of the peak, valley and flat three periods in a transformer area meter reading period, and analyzing and processing the abnormal reason of the line loss rate of the transformer area by using a big data analysis means, wherein the technical scheme is as follows:
the method is carried out on the basis of filtering the non-computable region, excluding the acquisition of the uncovered region and excluding the non-monitorable region, and comprises the following operation steps:
step 1, a data acquisition equipment terminal is installed at the lower end of a low-voltage side concentrator of a public transformer area based on a power line carrier principle;
step 2, the electricity consumption monitoring terminal freezes various data of all single-phase and three-phase intelligent electric meters in the meter reading period and transmits the data to a server;
and 3, the background analysis software analyzes the line loss of the transformer area by reading the data of the server side and constructing a line loss analysis model, automatically screens all abnormal users in the transformer area and provides a processing basis for field investigators.
And 2, recording various data of the intelligent electric meter in the step 2, wherein the data comprise positive and negative active meter characters of the electric energy meter, meter characters of peak, valley and flat three-phase time periods, and further comprise current, voltage, power factor, zero line current, phase angle and uncapping record information.
And 3, the line loss analysis model is divided into 9 items, namely a peak-valley time-sharing line loss analysis model, a voltage-current remote measurement model, a platform area line loss longitudinal analysis model, a platform area line loss transverse model, a platform area subsection line loss assessment model, a zero-crossing inspection model, a zero-fire simultaneous measurement model, a three-phase load balance model and a voltage-current in-phase model.
Compared with the prior art, the invention has the advantages and effects that: the method quantifies the loss electric quantity of the transformer area, defines the time period of electric quantity loss in the meter reading period, and defines whether the technical loss or the management loss is technical loss or metering failure or manual electricity stealing. The inspection range of the staff of the line loss worker is reduced, the workload is greatly reduced, and the working efficiency and the synchronous line loss treatment level are improved.
Drawings
FIG. 1 is a block diagram of a power usage monitoring system provided by the present invention;
FIG. 2 is a peak-to-valley time-sharing line loss model provided by the present invention;
FIG. 3 is a voltage-current remote recall model provided by the present invention;
FIG. 4 is a longitudinal analysis model of line loss of a distribution room provided by the present invention;
FIG. 5 is a table area line loss voltage level analysis model provided by the present invention;
FIG. 6 is a power consumption classification analysis model for the line loss of the transformer area provided by the present invention;
FIG. 7 is a cross-sectional line loss model of a distribution room provided by the present invention;
FIG. 8 is a sectional line loss assessment model of a transformer area provided by the present invention;
FIG. 9 is a zero-user review model provided by the present invention;
FIG. 10 is a zero fire simultaneous measurement model provided by the present invention;
FIG. 11 is a three-phase load balancing model provided by the present invention;
FIG. 12 is a voltage-current in-phase model provided by 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, each item of data of all single-phase and three-phase intelligent electric meters in the area in the meter reading period is frozen by the electricity monitoring terminal and transmitted to the server. And the background analysis software analyzes the line loss of the transformer area by reading the data of the server side and constructing a line loss analysis model, automatically screens all abnormal users in the transformer area and provides a processing basis for field investigators.
The line loss analysis model is divided into 9 items, namely a peak-valley time-sharing line loss analysis model, a voltage and current remote measurement model, a platform area line loss longitudinal analysis model, a platform area line loss transverse model, a platform area subsection line loss assessment model, a zero-crossing inspection model, a zero-fire simultaneous measurement model, a three-phase load balance model and a voltage and current in-phase model.
Example 2
Fig. 2 is a peak-valley time-sharing line loss analysis model provided by the present invention, which is created by using a line loss rate calculation method for active representation numbers of peaks, valleys and levels of all electric energy meters in a station area recalled by a data acquisition device terminal shown in fig. 2, and analyzes a line loss rate fluctuation condition of each time period of the station area according to calculated loss electric quantity and loss rate conditions of each time period to determine electric quantity loss time;
example 3
Fig. 3 is a voltage-current remote recall model provided by the present invention, and as shown in fig. 3, abnormal data is analyzed for records of user voltage, current, etc. recalled and collected by a data collection device terminal.
The analysis is as follows: if the calling voltage value is 380-400V, the zero line and the live line are reversely connected, and if the calling voltage value is 0V, the electric energy meter loses voltage; if the calling current is negative, the incoming and outgoing lines are reversely connected, and if the zero line current is larger than the live line current, the zero live line is reversely connected or the electricity is stolen.
Example 4
Fig. 4 is a table area line loss longitudinal analysis model provided by the present invention, and as shown in fig. 4, according to the fluctuation situation of the table area loss rate, the table area daily line loss data is queried, the query result is longitudinally analyzed, data sampling analysis is performed through the dates with the same power supply amount and large loss rate fluctuation, the users with large power fluctuation are subjected to field inspection, and the table area loss problem is found through inspection.
Example 5
As shown in fig. 5, the station area daily line loss data is queried, the query result is analyzed according to the voltage level, and the inspection range is narrowed through data sampling analysis;
example 6
As shown in fig. 6, the station area daily line loss data is queried, the query results are analyzed by power consumption classification, and the inspection range is narrowed through data sampling analysis.
Example 7
Fig. 7 is a table area line loss transverse model provided by the present invention, which is implemented by querying a table area daily line loss by using background data as shown in fig. 7, performing transverse analysis on a query result, performing transverse analysis when table area loss rates with the same power supply amount and the same power supply radius are passed, and then finding a table area loss problem by system or field inspection.
Example 8
Fig. 8 is a sectional line loss assessment model for a transformer area, as shown in fig. 8, an open type current transformer, a concentrator and an examination table are connected to a low-voltage transformer area branch to assess the line loss of a branch line, and the assessment result is used for continuously examining the site, so that the examination range is reduced, and the effect on a large transformer area is particularly obvious.
Example 9
Fig. 9 is a zero-crossing user inspection model provided by the present invention, and as shown in fig. 9, a work order is distributed to a user with a daily electric quantity of 0 according to background data, and a dispatcher inspects a user site.
Example 10
Fig. 10 is a zero-fire simultaneous measurement model provided by the present invention, as shown in fig. 10, a secondary cable or a user load line of a transformer station is measured by a multimeter (A, B, C, zero is simultaneously placed in a jaw of the multimeter), if the measurement result is 0, it indicates that no fault such as grounding, discharging and the like exists under a low-voltage line, and if there is a numerical value, it indicates that a fault point exists and further troubleshooting is required.
Example 11
Fig. 11 is a three-phase load balancing model provided by the present invention, and as shown in fig. 11, a system is used to perform three-phase balance calculation on background summoned current data, and perform field debugging on a three-phase unbalanced distribution room.
Example 12
Fig. 12 shows a voltage-current in-phase model provided by the invention, the combined current transformer has directivity, and a constructor cannot correctly wire in the installation process, so that the voltage and the current of the transformer area check meter are not synchronous, and the metering of the transformer area check meter is abnormal. In the process of abnormal investigation and treatment, the phase relation between the transformer and the current transformer needs to be checked, and the color codes of the secondary wiring terminal of the transformer and the voltage three-phase voltage line of the checking table are faded due to the influence of sunlight, climate and the like for a long time, so that the judgment can not be directly carried out by naked eyes. Power failure is required to be applied for testing and troubleshooting, and due to the large time span, abnormal problems cannot be processed in time, so that statistics and analysis of station area loss are affected; as shown in fig. 12, the system performs voltage test on the station area with a negative line loss rate and a power supply amount of 0, generates a test order, and corrects the station area connection according to the test result.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (1)

1. The abnormal analysis and processing method for the line loss rate of the transformer area is characterized by comprising the following steps:
step 1, a data acquisition equipment terminal is installed at the lower end of a low-voltage side concentrator of a public transformer area based on a power line carrier principle;
step 2, the electricity consumption monitoring terminal freezes various data of all single-phase and three-phase intelligent electric meters in the meter reading period and transmits the data to a server;
step 3, the background analysis software analyzes the line loss of the transformer area by reading the data of the server side and constructing a line loss analysis model, automatically screens all abnormal users in the transformer area and provides a processing basis for field investigators;
each item of data of the intelligent ammeter in the step 2 comprises positive and negative active table characters of the electric energy meter, table characters of peak, valley and flat three-phase time periods, and also comprises current, voltage, power factor, zero line current, phase angle and uncapping recording information;
the line loss analysis model in the step 3 is divided into 9 items, namely a peak-valley time-sharing line loss analysis model, a voltage-current remote measurement model, a platform area line loss longitudinal analysis model, a platform area line loss transverse model, a platform area subsection line loss assessment model, a zero-user marking inspection model, a zero-fire simultaneous measurement model, a three-phase load balance model and a voltage-current in-phase model;
the peak-valley time-sharing line loss analysis model is characterized in that active power expression numbers of all electric energy meters in three periods of peak, valley and average in a distribution area recalled by a data acquisition equipment terminal are used for creating the peak-valley time-sharing line loss analysis model by using a line loss rate calculation method, and analyzing the line loss rate fluctuation condition of each period of the distribution area according to the calculated loss electric quantity and loss rate condition of each period of time to determine the electric quantity loss time;
the voltage and current remote recall model is used for analyzing abnormal data by recording user voltage and current recalled and collected by a data acquisition equipment terminal;
the analysis is as follows: if the calling voltage value is 380-400V, the zero line and the live line are reversely connected, and if the calling voltage value is 0V, the electric energy meter loses voltage; if the calling current is a negative value, the incoming and outgoing lines are reversely connected, and if the zero line current is larger than the live line current, the zero line and the live line are reversely connected or electricity is stolen;
the transformer area line loss longitudinal analysis model is used for inquiring transformer area daily line loss data according to the fluctuation condition of the transformer area loss rate, longitudinally analyzing the inquiry result, performing data sampling analysis through the date with the same power supply quantity and large loss rate fluctuation, performing field inspection on users with large power quantity fluctuation, and finding out transformer area loss problems through inspection;
the platform area line loss transverse model is characterized in that the platform area daily line loss is inquired by utilizing background data, the inquiry result is transversely analyzed, the platform area loss problem is found through system or field inspection when the platform area loss rate with the same power supply quantity and the same power supply radius is used for transverse analysis;
the transformer area subsection line loss assessment model is characterized in that an open type current transformer, a concentrator and an examination table are hung on a low-voltage transformer area branch to conduct line loss assessment on branch lines, and the assessment results are used for conducting continuous field examination;
the zero-marking user inspection model is that a work order is distributed to users with daily electricity quantity of 0 according to background data, and a dispatcher inspects the user site;
the zero-fire simultaneous measurement model is characterized in that a transformer secondary cable or a user load line is measured by using a universal meter, if the measurement result is 0, no grounding and discharging fault exists under a low-voltage line, and if a numerical value exists, a fault point needs to be further checked;
the three-phase load balance model is that a system is utilized to carry out three-phase balance calculation on background calling current data and carry out field debugging on a three-phase unbalanced platform area;
the voltage and current in-phase model is that the system performs voltage test on the transformer area with negative line loss rate and 0 power supply amount, generates a test work order and corrects the transformer area wiring according to the test result.
CN201910898758.4A 2019-09-23 2019-09-23 Abnormal analysis and processing method for line loss rate of transformer area Active CN110703009B (en)

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CN111711192B (en) * 2020-06-22 2022-03-11 国网湖南省电力有限公司 Real-time line loss analysis method and system for lean management of line loss of support station area
CN112685885A (en) * 2020-12-25 2021-04-20 青岛鼎信通讯股份有限公司 Transformer area line loss analysis method for comprehensive big data analysis
CN113346612A (en) * 2021-04-30 2021-09-03 贵州电网有限责任公司 Low-voltage distribution room three-phase load unbalance simulation adjustment method and system based on broadband power line carrier communication technology
CN114298863A (en) * 2022-03-11 2022-04-08 浙江万胜智能科技股份有限公司 Data acquisition method and system of intelligent meter reading terminal
CN114638554A (en) * 2022-05-18 2022-06-17 国网浙江省电力有限公司 Marketing business health index evaluation joint control method and system

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