CN117330864A - Intelligent measuring method and device for line loss of branch line - Google Patents
Intelligent measuring method and device for line loss of branch line Download PDFInfo
- Publication number
- CN117330864A CN117330864A CN202311254409.1A CN202311254409A CN117330864A CN 117330864 A CN117330864 A CN 117330864A CN 202311254409 A CN202311254409 A CN 202311254409A CN 117330864 A CN117330864 A CN 117330864A
- Authority
- CN
- China
- Prior art keywords
- meter reading
- data
- ammeter
- branch line
- receiving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000005611 electricity Effects 0.000 claims description 48
- 238000005259 measurement Methods 0.000 claims description 21
- 230000002159 abnormal effect Effects 0.000 claims description 6
- 238000013500 data storage Methods 0.000 claims description 5
- 238000000691 measurement method Methods 0.000 claims description 4
- 238000012795 verification Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000013518 transcription Methods 0.000 description 3
- 230000035897 transcription Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008571 general function Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/061—Details of electronic electricity meters
- G01R22/063—Details of electronic electricity meters related to remote communication
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses an intelligent measuring method and device for line loss of a branch line. The method comprises the steps of sending meter reading task signals and broadcast address meter reading signals to a plurality of electric meters on a branch line to be tested; receiving data returned by the ammeter through a first receiving point to obtain first meter reading data; receiving data returned by the ammeter through a second receiving point to obtain second meter reading data; judging an ammeter positioned at the second half section of the branch line to be tested according to the receiving time of the first meter reading data and the receiving time of the second meter reading data; the distance between the first receiving point and the main circuit is smaller than that between the second receiving point and the main circuit; and meter reading is carried out again on the ammeter at the second half section of the branch circuit to be tested to obtain third meter reading data, so that the purposes of automatically acquiring ammeter information at the second half section of the branch circuit and determining ammeter electric quantity at the rear end of the branch circuit according to time nodes are achieved, the situation of line loss of the branch circuit to be tested is determined by automatically counting and analyzing the electric quantity, and the workload of personnel is reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of line loss measurement, in particular to an intelligent measuring method and device for line loss of a branch line.
Background
In a power distribution network, line loss measurement of branch lines is an important link. Accurate line loss measurement is beneficial to evaluating the efficiency of the power distribution network, optimizing power distribution and reducing operation cost.
The branch line loss is counted by a method of adding a branch line checking table to determine which branch the line loss of the station area is caused by for the station area with a large number of users or a large number of low-voltage line branch lines.
However, in the actual process of counting the branch line loss, it is impossible to determine which electric meters are arranged at the rear end of the branch, and the information of the electric meters needs to be transcribed on site according to the line trend, so that the workload is large, the transcription is wrong, and the situation that the transcription leaks exists can occur. In addition, after the branch examination table has electric quantity data, manual statistical analysis is still needed, and the workload of statistical staff is increased.
Disclosure of Invention
The invention provides an intelligent measuring method and device for line loss of a branch line, which are used for automatically acquiring ammeter information at the back section of the branch line and analyzing the line loss condition, reducing the workload of personnel and realizing accurate loss reduction.
In a first aspect, an embodiment of the present invention provides a method for intelligently measuring a line loss of a branch line, including:
sending meter reading task signals and broadcast address meter reading signals to a plurality of electric meters on a branch line to be tested;
receiving data returned by the ammeter through a first receiving point to obtain first meter reading data; receiving data returned by the ammeter through a second receiving point to obtain second meter reading data; judging an ammeter positioned at the second half section of the branch line to be tested according to the receiving time of the first meter reading data and the receiving time of the second meter reading data; the distance between the first receiving point and the main circuit is smaller than the distance between the second receiving point and the main circuit;
re-reading the ammeter at the second half section of the branch line to be tested to obtain third meter reading data;
and acquiring the total electricity consumption of the branch circuit to be tested, and determining the line loss of the branch circuit to be tested according to the total electricity consumption, the first meter reading data, the second meter reading data and the third meter reading data.
Further, the first meter reading data comprises the receiving time of the first receiving point for receiving the data returned by the ammeter; the second meter reading data comprises the receiving time of the second receiving point for receiving the data returned by the ammeter.
Further, the method for judging the ammeter at the second half section of the branch line to be tested according to the receiving time of the first meter reading data and the receiving time of the second meter reading data comprises the following steps:
and when the receiving time of the same ammeter return data in the first meter reading data is greater than the receiving time of the same ammeter return data in the second meter reading data and the difference value of the receiving time of the first meter reading data and the receiving time of the first meter reading data is greater than a first time threshold value, judging that the ammeter is the ammeter positioned at the second half section of the branch line to be tested.
Further, the meter reading task signal contains corresponding meter address data on the branch line to be detected, and the meter returns meter data after receiving the meter reading task signal containing the meter address data;
the broadcast address meter reading signal can enable all the electric meters on the branch line to be tested to read and return electric meter data.
Further, after obtaining the first meter reading data and the second meter reading data, the method further includes:
if an ammeter which returns data according to the broadcasting address meter reading signal exists in the first meter reading data and the second meter reading data and does not return data according to the meter reading task signal, determining that the ammeter is an unlabeled ammeter; the unlabeled ammeter is an ammeter which does not have ammeter addresses.
Further, after the determining that the electric meter is an unlabeled electric meter, the method further includes:
reading and recording the ammeter addresses of the unlabeled ammeter, and reporting to a master station for verification; wherein the electricity meter address includes a measurement point and meter address data.
Further, determining the line loss of the branch line to be measured according to the total power consumption, the first meter reading data, the second meter reading data and the third meter reading data includes:
judging the electricity consumption of all the electric meters in the branch circuit to be tested according to the first meter reading data, the second meter reading data and the third meter reading data;
and subtracting the electricity consumption of all the electricity meters from the total electricity consumption of the branch circuit to be tested to obtain the line loss of the branch circuit to be tested.
In a second aspect, an embodiment of the present invention further provides an intelligent measurement device for a branch line loss, configured to perform the above-mentioned intelligent measurement method for a branch line loss, where the intelligent measurement device includes a concentrator, a main data processor, a signal transmitting unit, a first signal receiving unit, and a second signal receiving unit;
the concentrator is used for communicating with the main station, storing ammeter address data on the branch circuit to be tested and obtaining the total electricity consumption of the branch circuit to be tested; the concentrator is also used for receiving meter reading periods and meter reading tasks issued by the master station or locally set to the master data processor;
the main data processor is used for reading the ammeter address data stored in the concentrator and on the branch circuit to be tested, generating a meter reading task according to the ammeter address data, and sending the meter reading task to the signal transmitting unit;
the signal transmitting unit is used for transmitting meter reading task signals and broadcast address meter reading signals to a plurality of electric meters on the branch line to be tested according to the meter reading task;
the first signal receiving unit and the second signal receiving unit are positioned at different positions on the branch line, the distance between the first signal receiving unit and the main line is smaller than that between the second signal receiving unit and the main line, and the first signal receiving unit is used for receiving the ammeter return data, marking the received time point and sending the received time point to the main data processor as first meter reading data; the second signal receiving unit is used for receiving the ammeter return data, marking the received time point and sending the received time point as second meter reading data to the main data processor;
the main data processor is also used for judging an ammeter positioned at the second half section of the branch line to be tested according to the receiving time of the first meter reading data and the receiving time of the second meter reading data; the main data processor is also used for marking abnormal ammeter data of positive correlation, negative correlation, sudden increase, sudden decrease, voltage loss, current differential and illegal uncovering of the ammeter electric quantity and the total electricity consumption in the statistical period according to the line loss of the branch line to be detected, and sending the abnormal ammeter data to the concentrator.
Further, the device also comprises a current transformer and a voltage sampler, wherein the current transformer is used for acquiring real-time current information of the branch line to be tested and sending the real-time current information to the concentrator;
the voltage sampler is used for acquiring real-time voltage information of the branch circuit to be tested and sending the real-time voltage information to the concentrator.
Further, the device also comprises a data storage unit for storing data of the main data processor and the concentrator.
According to the intelligent measuring method for the line loss of the branch line, meter reading task signals and broadcast address meter reading signals are sent to a plurality of electric meters on the branch line to be measured, and data returned by the electric meters are received through a first receiving point, so that first meter reading data are obtained; receiving data returned by the ammeter through a second receiving point to obtain second meter reading data, judging the ammeter positioned at the second half section of the branch line to be tested according to the receiving time of the first meter reading data and the receiving time of the second meter reading data, and reading the ammeter at the second half section of the branch line to be tested again to obtain third meter reading data; the total electricity consumption of the branch circuit to be measured is obtained, and the line loss of the branch circuit to be measured is determined according to the total electricity consumption, the first meter reading data, the second meter reading data and the third meter reading data. Therefore, the method and the device can automatically acquire the ammeter information of the rear section of the branch line, determine the ammeter positioned at the rear end of the branch line according to the time node, automatically count the electric energy and determine the line loss condition of the branch line to be measured, reduce the workload of personnel and realize accurate measurement of the line loss condition of the branch line.
Drawings
Fig. 1 is a flowchart of a method for intelligently measuring line loss of a branch line according to an embodiment of the present invention.
Fig. 2 is a flowchart of a method for intelligently measuring line loss of a branch line according to a second embodiment of the present invention.
Fig. 3 is a flowchart of a method for determining an unlabeled electricity meter according to a second embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an intelligent measurement device for line loss of a branch line according to a third embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an intelligent measurement device for line loss of a branch line according to a fourth embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Example 1
Fig. 1 is a flowchart of a method for intelligently measuring line loss of a branch line, which is provided in an embodiment of the present invention, and the method may be executed by an intelligent measuring device for line loss of a branch line, as shown in fig. 1, and specifically includes the following steps:
step S110, sending meter reading task signals and broadcast address meter reading signals to a plurality of electric meters on a branch line to be tested;
the meter reading task signal may include a meter measuring point, a meter address and the like on the branch line, and the meter reading task signal may be sent only to the meters of the users who have been filed by the system, the broadcast address meter reading signal may be sent to the meters of all the users installed on the branch line, the unlabeled meters of the "black households" which are not filed by the system may not receive the meter reading task signal, and only the broadcast address meter reading signal may be received, and the data may be returned according to the broadcast address meter reading signal. After the plurality of electric meters on the branch line to be tested receive meter reading task signals or broadcast address meter reading signals, signals containing electricity consumption data of the electric meters can be returned to a meter reading data receiving end, and unlabeled electric meters which are positioned in black households and not filed by the system can be judged according to the data signals returned by the electric meters by sending the meter reading task signals and the broadcast address meter reading signals to the plurality of electric meters on the branch line to be tested.
Step S120, receiving data returned by the ammeter through a first receiving point to obtain first meter reading data; receiving data returned by the ammeter through a second receiving point to obtain second meter reading data; judging an ammeter positioned at the second half section of the branch line to be tested according to the receiving time of the first meter reading data and the receiving time of the second meter reading data; the distance between the first receiving point and the main circuit is smaller than that between the second receiving point and the main circuit;
specifically, the first receiving point and the second receiving point are located at different positions on the branch line to be measured, the first receiving point and the second receiving point can be close to the initial end of the main line at the branch line to be measured, and the distance between the first receiving point and the main line is smaller than the distance between the second receiving point and the main line, so that obvious differences exist between the time points of the return data of the ammeter received by the first receiving point and the second receiving point. And judging the ammeter in the second half section of the branch line to be tested according to the difference between the receiving time of the first meter reading data and the receiving time of the second meter reading data, wherein when the time point of the ammeter return data received by the first receiving point is larger than the time point of the ammeter return data received by the second receiving point by a certain time, the ammeter can be judged to be the ammeter in the second half section of the branch line to be tested. Accordingly, all the electric meters positioned at the second half section of the branch line to be tested are judged in sequence according to the receiving time of the first meter reading data and the receiving time of the second meter reading data, and the situation that in the prior art, the electric meters positioned at the second half section of the branch line are judged according to the information of the electric meters which are transcribed on site in the line trend, so that the workload is large and transcription errors exist is avoided.
Step S130, meter reading is performed again on the ammeter at the second half section of the branch line to be tested, and third meter reading data are obtained;
specifically, after the ammeter in the second half section of the branch line to be tested is judged, the meter reading task signal and the broadcast address meter reading signal are sent again to the ammeter in the second half section of the branch line to be tested, so that the ammeter in the second half section of the branch line to be tested returns meter reading data again, the meter reading data returned again by the ammeter in the second half section of the branch line to be tested is received through the first receiving point and the second receiving point and is used as third meter reading data, and the process of only meter reading of the ammeter in the second half section of the branch line to be tested is completed.
Step S140, obtaining the total electricity consumption of the branch circuit to be tested, and determining the line loss of the branch circuit to be tested according to the total electricity consumption, the first meter reading data, the second meter reading data and the third meter reading data.
Specifically, the line loss, i.e., line loss, refers to a phenomenon that electric energy is lost in the transmission process due to resistance heat loss, induced electromagnetic wave loss, capacitance current loss, and other reasons generated by current passing through a wire in a power transmission and distribution line. The line loss is an important index for measuring the operation quality of the power system, and the operation efficiency and the economy of the power system can be improved by reducing the line loss, so that the line loss of the branch line to be measured needs to be determined. Line loss may also refer to the difference between the power generated by an electric power plant or substation when it arrives at the hand of an electricity consumer and the power generated, i.e., line loss = generated power-arrived power. The total electricity consumption of the branch circuit to be measured can be determined according to real-time voltage and current information of the branch circuit to be measured, which is close to the initial end of the main circuit, the line loss of the branch circuit to be measured can be determined according to the total electricity consumption, the first meter reading data, the second meter reading data and the third meter reading data according to time nodes, and the electricity consumption data of each ammeter in the branch circuit to be measured, from last meter reading to the current meter reading, is determined according to the first meter reading data, the second meter reading data and the third meter reading data, and the line loss = total electricity consumption of the branch circuit to be measured in the last meter reading to the current meter reading period is exemplified as the electricity consumption of all the ammeter. After the line loss of the branch line to be measured is determined, the analysis result can be displayed and reported locally to the main station. The method has the advantages that the electric meter information of the rear section of the branch line is automatically acquired, the electric energy is automatically counted according to the time nodes, the line loss condition is analyzed, the workload of personnel is reduced, and the accurate loss reduction is realized.
According to the technical scheme, meter reading task signals and broadcast address meter reading signals are sent to a plurality of electric meters on a branch line to be detected, and data returned by the electric meters are received through a first receiving point, so that first meter reading data are obtained; receiving data returned by the ammeter through a second receiving point to obtain second meter reading data, judging the ammeter positioned at the second half section of the branch line to be tested according to the receiving time of the first meter reading data and the receiving time of the second meter reading data, and reading the ammeter at the second half section of the branch line to be tested again to obtain third meter reading data; the total electricity consumption of the branch circuit to be measured is obtained, and the line loss of the branch circuit to be measured is determined according to the total electricity consumption, the first meter reading data, the second meter reading data and the third meter reading data. Therefore, the method and the device can automatically acquire the ammeter information of the rear section of the branch line, determine the ammeter positioned at the rear end of the branch line according to the time node, automatically count the electric energy and determine the line loss condition of the branch line to be measured, reduce the workload of personnel and realize accurate measurement of the line loss condition of the branch line.
Example two
Fig. 2 is a flowchart of a method for intelligently measuring line loss of a branch line according to a second embodiment of the present invention, where the method in the embodiment is further supplemented on the basis of the method in the foregoing embodiment, as shown in fig. 2, and the method includes:
step S110, sending meter reading task signals and broadcast address meter reading signals to a plurality of electric meters on a branch line to be tested;
step S121, receiving data returned by an ammeter through a first receiving point to obtain first meter reading data; receiving data returned by the ammeter through a second receiving point to obtain second meter reading data; the first meter reading data comprises the receiving time of the data returned by the first receiving point receiving ammeter; the second meter reading data comprises the receiving time of the data returned by the second receiving point receiving ammeter;
specifically, when the first receiving point and the second receiving point receive the data returned by each ammeter on the branch line to be tested, the time point of returning the data by each ammeter is performed, and the ammeter corresponding to the time node information is associated, in the first meter reading data and the second meter reading data, the first meter reading data comprises the receiving time of the data returned by the ammeter received by the first receiving point, and the second meter reading data comprises the receiving time of the data returned by the ammeter received by the second receiving point, so that the ammeter positioned at the second half section of the branch line to be tested is determined according to the receiving time of the data returned by the ammeter received by the first receiving point and the receiving time of the data returned by the ammeter received by the second receiving point.
Step S122, when the receiving time of the same ammeter returning data in the first meter reading data is greater than the receiving time of the same ammeter returning data in the second meter reading data and the difference value of the receiving time is greater than a first time threshold value, judging that the ammeter is the ammeter in the second half section of the branch line to be tested; the distance between the first receiving point and the main circuit is smaller than that between the second receiving point and the main circuit;
specifically, the first time threshold may be a difference between the return data of the electric meter located in the middle of the branch line to be measured and the first receiving point and the second receiving point, so as to distinguish the electric meter located in the first half section and the second half section of the branch line to be measured. When the receiving time of the same ammeter return data in the first meter reading data is greater than the receiving time of the same ammeter return data in the second meter reading data and the difference value of the receiving time of the first meter reading data and the receiving time is greater than a first time threshold value, the ammeter is judged to be the ammeter positioned at the second half section of the branch line to be measured, and the address information of the ammeter positioned at the second half section of the branch line to be measured is stored, so that only the ammeter positioned at the second half section of the branch line to be measured can be subjected to meter reading.
Step S130, meter reading is performed again on the ammeter at the second half section of the branch line to be tested, and third meter reading data are obtained;
step S141, judging the electricity consumption of all the electric meters in the branch line to be tested according to the first meter reading data, the second meter reading data and the third meter reading data;
specifically, the first meter reading data, the second meter reading data and the third meter reading data comprise electricity consumption data in all electric meters in the branch circuit to be tested, and the electricity consumption data in all electric meters are stored.
And S142, subtracting the electricity consumption of all the electricity meters from the total electricity consumption of the branch circuit to be tested to obtain the line loss of the branch circuit to be tested.
Specifically, the total power consumption of the branch circuit to be measured can be determined according to real-time voltage and current information of the branch circuit to be measured near the initial end of the main circuit. And extracting the electricity consumption data and the total electricity consumption in all the electric meters according to the time node in the data storage unit for line loss analysis, and subtracting the electricity consumption of all the electric meters from the total electricity consumption to obtain the line loss data of the branch line to be detected, wherein the line loss is caused by resistance heat loss, induction electromagnetic wave loss and capacitance current loss generated by current passing through a wire in the branch line, thereby realizing the line loss analysis.
Optionally, the meter reading task signal includes corresponding meter address data on the branch line to be measured, and the meter returns the meter data after receiving the meter reading task signal including the meter address data;
broadcasting the address meter reading signal can enable all the electric meters on the branch line to be tested to read and return electric meter data.
Specifically, the meter reading task signal may include meter measuring points, meter address data and the like on the branch line, and the meter only sends to the meter of the user who has system archiving, and the meter returns the meter data after receiving the meter reading task signal including the meter address data. The broadcast address meter reading signal can be sent to all the electric meters of the users installed on the branch line, all the electric meters on the branch line to be tested are subjected to meter reading, the unlabeled electric meters of the 'black households' which are not archived by the system can not receive the meter reading task signal, only the broadcast address meter reading signal can be received, and data is returned according to the broadcast address meter reading signal.
Further, fig. 3 is a flowchart of a method for determining an unlabeled ammeter according to a second embodiment of the present invention, where the unlabeled ammeter at the back end of a branch line may be determined. As shown in fig. 3, the method includes:
step S150, in the first meter reading data and the second meter reading data, if an ammeter which returns data according to the broadcasting address meter reading signal exists and an ammeter which does not return data according to the meter reading task signal exists, determining that the ammeter is an unlabeled ammeter; the unlabeled ammeter is an ammeter which does not have ammeter addresses.
Specifically, the unlabeled meter is a meter that is already present in the branch line to be tested, but that is not addressed by the meter, i.e. "black house", and is typically located at the back end of the branch line. The first meter reading data and the second meter reading data comprise an ammeter which returns data according to the meter reading task signal and an ammeter which returns data according to the broadcast address meter reading signal, and unlabeled ammeter of a black household which is not filed by the system cannot receive the meter reading task signal, can only receive the broadcast address meter reading signal, and returns data according to the broadcast address meter reading signal. Accordingly, by analyzing the first meter reading data and the second meter reading data, if an ammeter which returns data according to the broadcasting address meter reading signal exists and an ammeter which does not return data according to the meter reading task signal exists, the ammeter is determined to be an unlabeled ammeter.
Step S160, reading and recording the ammeter addresses of the unlabeled ammeter, and reporting to the master station for verification; wherein the meter address includes a measurement point and meter address data.
Specifically, the unlabeled ammeter is read again, data such as the table address is reported to the concentrator for master station check, and after the unlabeled ammeter is determined, information such as the measuring point and the table address data of the ammeter is stored.
According to the technical scheme, meter reading task signals and broadcast address meter reading signals are sent to a plurality of electric meters on a branch line to be tested, data returned by the electric meters are received through a first receiving point and a second receiving point, first meter reading data and second meter reading data are obtained, the electric meters positioned in the latter half section of the branch line to be tested are judged according to the receiving time of the first meter reading data and the receiving time of the second meter reading data, meter reading is conducted again on the electric meters positioned in the latter half section of the branch line to be tested, third meter reading data are obtained, and the unmarked electric meters in the latter half section of the branch line to be tested are determined according to the first meter reading data and the second meter reading data; the total electricity consumption of the branch circuit to be measured is obtained, and the line loss of the branch circuit to be measured is determined according to the total electricity consumption, the first meter reading data, the second meter reading data and the third meter reading data. Therefore, the method and the device can automatically acquire the information of the ammeter at the rear section of the branch line, determine the ammeter at the rear end of the branch line according to the time node, automatically count the energy of the electricity to determine the line loss condition of the branch line to be measured, automatically read the ammeter address of the ammeter which is not marked at the rear end of the branch line, reduce the workload of statistics staff and accurately measure the line loss condition of the branch line.
Example III
Fig. 4 is a schematic structural diagram of an intelligent measurement device for line loss of a branch line according to a third embodiment of the present invention. The present embodiment may be based on the above embodiment, and is used to perform the branch line loss intelligent measurement method of the above embodiment, as shown in fig. 4, and includes a concentrator 101, a main data processor 102, a signal transmitting unit 103, a first signal receiving unit 104, and a second signal receiving unit 105;
the concentrator 101 is used for communicating with the main station, storing ammeter address data on the branch circuit to be tested, and acquiring the total electricity consumption of the branch circuit to be tested; the concentrator 101 is also used for receiving meter reading periods and meter reading tasks issued by the master station or locally set to the master data processor 102;
the main data processor 102 is configured to read the ammeter address data on the branch circuit to be tested stored in the concentrator 101, generate a meter reading task according to the ammeter address data, and send the meter reading task to the signal transmitting unit 103;
the signal transmitting unit 103 is used for transmitting meter reading task signals and broadcast address meter reading signals to a plurality of electric meters on the branch line to be tested according to the meter reading task;
the first signal receiving unit 104 and the second signal receiving unit 105 are located at different positions on the branch line, and the distance between the first signal receiving unit 104 and the main line is smaller than the distance between the second signal receiving unit 105 and the main line, and the first signal receiving unit 104 is used for receiving the return data of the ammeter, marking the received time point, and sending the marked time point as first meter reading data to the main data processor 102; the second signal receiving unit 105 is configured to receive the ammeter return data, mark a received time point, and send the received time point as second meter reading data to the main data processor 102;
the main data processor 102 is further configured to determine an ammeter located in a second half section of the branch line to be tested according to the receiving time of the first meter reading data and the receiving time of the second meter reading data; the main data processor 102 is further configured to mark abnormal ammeter data that shows positive correlation, negative correlation, sudden increase, sudden decrease, voltage loss, current differential and illegal opening of the ammeter in the statistical period according to the line loss through the branch line to be detected, and send the abnormal ammeter data to the concentrator.
Specifically, the concentrator 101 has a general function of an existing concentrator, is responsible for communicating with a master station, and is also responsible for sampling voltage and current of a branch line to be measured, and can measure total power consumption of the branch line to be measured. Concentrator 101 also stores meter address data, such as measurement points, meter addresses, etc., for the corresponding low voltage subscriber on the branch line under test. The concentrator 101 may communicate with the main data processor 102 via a power line carrier, RS485, or other communication channel.
The main data processor 102 generates a meter reading task according to the ammeter address data by reading the ammeter address data stored in the concentrator 101 and sends the meter reading task to the signal transmitting unit 103 to execute the meter reading task.
The signal transmitting unit 103 may perform a meter reading task transmitted from the main data processor 102, and transmit meter reading task signals and broadcast address meter reading signals to a plurality of electric meters on the branch line to be measured. The meter reading task signal comprises corresponding meter address data on a branch line to be measured, and the meter returns the meter data after receiving the meter reading task signal comprising the meter address data; broadcasting the address meter reading signal can enable all the electric meters on the branch line to be tested to read and return electric meter data.
The first signal receiving unit 104 and the second signal receiving unit 105 are located at different positions on the branch line, for example, the first signal receiving unit 104 is located at a first receiving point and the second signal receiving unit 105 is located at a second receiving point. The first signal receiving unit 104 and the second signal receiving unit 105 may be near the initial end of the main line at the branch line to be measured, and the distance between the first signal receiving unit 104 and the main line is smaller than the distance between the second signal receiving unit 105 and the main line, so that there is a significant difference between the time points of the return data of the electric meter received by the first signal receiving unit 104 and the second signal receiving unit 105. After the first signal receiving unit 104 and the second signal receiving unit 105 receive the first meter reading data and the second meter reading data including the reception time node, the first meter reading data and the second meter reading data are transmitted to the main data processor 102.
The main data processor 102 analyzes the first meter reading data and the second meter reading data, and when the receiving time of the same meter returning data in the first meter reading data is longer than the receiving time of the same meter returning data in the second meter reading data and the difference value of the receiving time is longer than the first time threshold, the meter is judged to be the meter in the second half section of the branch line to be tested. After judging all the electric meters in the second half of the branch line to be measured, the main data processor 102 sends the meter reading task to the signal transmitting unit 103 again according to the electric meter address of the electric meter in the second half of the branch line to be measured. The signal transmitting unit 103 transmits a meter reading task signal and a broadcast address meter reading signal to the electric meter at the second half section of the branch line to be tested according to the meter reading task transmitted by the main data processor 102, and the first signal receiving unit 104 and the second signal receiving unit 105 again receive data returned by the electric meter at the second half section of the branch line to be tested, and transmit the data to the main data processor 102 as third data meter reading. The main data processor 102 stores the data returned by the ammeter at the second half section of the branch line to be tested, analyzes the line loss of the branch line to be tested according to the total electricity consumption of the branch line to be tested stored in the concentrator 101 and the stored first meter reading data, second meter reading data and third meter reading data according to time nodes, and sends the analysis result to the main station for executing local display and reporting. The main data processor 102 can also determine the untagged ammeter in the branch line to be tested according to the first meter reading data and the second meter reading data, read the ammeter address of the untagged ammeter, and report to the main station for verification. In addition, after the main data processor 102 analyzes the line loss of the branch line to be tested, through the line loss of the branch line to be tested, the electric meter data of positive correlation, negative correlation, sudden increase, sudden decrease, voltage loss and current loss of the electric quantity and the total electric quantity in the statistical period are marked and sent to the concentrator, and the concentrator marks the electric meter data of positive correlation, negative correlation, sudden increase, sudden decrease, voltage loss and current loss of the electric quantity and the total electric quantity in the statistical period and uploads the electric meter data to the main station, so that the staff can know and judge the overall operation state of the branch line to be tested.
The technical scheme of the embodiment is that the intelligent measuring device for the line loss of the branch line comprises a concentrator, a main data processor, a signal transmitting unit, a first signal receiving unit and a second signal receiving unit, wherein the main data processor is used for reading ammeter address data on a branch line to be measured stored in the concentrator, generating a meter reading task according to the ammeter address data, transmitting the meter reading task to the signal transmitting unit, the signal transmitting unit is used for transmitting meter reading task signals and broadcasting address meter reading signals to a plurality of ammeter on the branch line to be measured according to the meter reading task, the first signal receiving unit and the second signal receiving unit are used for receiving data returned by the ammeter, obtaining first meter reading data and second meter reading data and transmitting the first meter reading data and the second meter reading data to the main data processor, the main data processor judges meter reading of the second half section of the branch line to be measured according to the receiving time of the first meter reading data and the receiving time of the second meter reading data, and meter reading again of the second half section of the branch line to be measured is used for obtaining third meter reading data, so that the main data processor can analyze the loss of the branch line to be measured according to the total electricity consumption of the branch line to be measured, the first meter reading data and the second meter reading data and the third meter reading data. Therefore, the method and the device can automatically acquire the ammeter information of the rear section of the branch line, determine the ammeter positioned at the rear end of the branch line according to the time node, automatically count the electric energy and determine the line loss condition of the branch line to be measured, and the main data processor can also automatically read the ammeter address of the ammeter which is not marked at the rear end of the branch line, thereby reducing the workload of statistics staff and realizing accurate measurement of the line loss condition of the branch line.
Example IV
Fig. 5 is a schematic structural diagram of an intelligent measurement device for line loss of a branch line according to a fourth embodiment of the present invention. The present embodiment may be based on the foregoing embodiment, and further perfects the intelligent measurement device for line loss of a branch line in the foregoing embodiment, as shown in fig. 5, where the intelligent measurement device for line loss of a branch line further includes: the current transformer 106 and the voltage sampler 107, the current transformer 106 is used for obtaining real-time current information of the branch line to be tested and sending the real-time current information to the concentrator 101;
the voltage sampler 107 is configured to obtain real-time voltage information of the branch line to be tested, and send the real-time voltage information to the concentrator 101.
Specifically, the current transformer 106 and the voltage sampler 107 are located at the junction of the branch line to be measured and the main line, and can measure real-time current and voltage information of the branch line to be measured, and send the real-time current and voltage information of the branch line to be measured to the concentrator 101, where the concentrator 101 stores the real-time current and voltage information of the branch line to be measured according to a time node, so that the concentrator 101 can measure total power consumption of the branch line to be measured within a certain time according to the real-time current and voltage information of the branch line to be measured.
Further, as shown in fig. 5, the branch line loss intelligent measurement apparatus further includes a data storage unit 108 for storing data of the main data processor 102 and the concentrator 101.
Specifically, the data storage unit 108 may be used as a data memory of the main data processor 102 and the concentrator 101 to store the electric energy data in the main data processor 102 and the concentrator 101, so that the main data processor 102 can determine the electric meter information of the rear section of the branch line to be tested, automatically count the electric energy according to the time node, and analyze the line loss condition of the branch line to be tested, thereby reducing the workload of the statistics personnel.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (10)
1. The intelligent measuring method for the line loss of the branch line is characterized by comprising the following steps of:
sending meter reading task signals and broadcast address meter reading signals to a plurality of electric meters on a branch line to be tested;
receiving data returned by the ammeter through a first receiving point to obtain first meter reading data; receiving data returned by the ammeter through a second receiving point to obtain second meter reading data; judging an ammeter positioned at the second half section of the branch line to be tested according to the receiving time of the first meter reading data and the receiving time of the second meter reading data; the distance between the first receiving point and the main circuit is smaller than the distance between the second receiving point and the main circuit;
re-reading the ammeter at the second half section of the branch line to be tested to obtain third meter reading data;
and acquiring the total electricity consumption of the branch circuit to be tested, and determining the line loss of the branch circuit to be tested according to the total electricity consumption, the first meter reading data, the second meter reading data and the third meter reading data.
2. The intelligent measuring method for branch line loss according to claim 1, wherein the first meter reading data includes a receiving time of the first receiving point for receiving data returned by the electric meter; the second meter reading data comprises the receiving time of the second receiving point for receiving the data returned by the ammeter.
3. The intelligent measuring method for branch line loss according to claim 2, wherein determining the electric meter in the second half of the branch line to be measured according to the receiving time of the first meter reading data and the receiving time of the second meter reading data comprises:
and when the receiving time of the same ammeter return data in the first meter reading data is greater than the receiving time of the same ammeter return data in the second meter reading data and the difference value of the receiving time of the first meter reading data and the receiving time of the first meter reading data is greater than a first time threshold value, judging that the ammeter is the ammeter positioned at the second half section of the branch line to be tested.
4. The intelligent measuring method for branch line loss according to claim 1, wherein the meter reading task signal includes corresponding meter address data on the branch line to be measured, and the meter returns meter data after receiving the meter reading task signal including the meter address data;
the broadcast address meter reading signal can enable all the electric meters on the branch line to be tested to read and return electric meter data.
5. The branch line loss intelligent measurement method according to claim 1, further comprising, after obtaining the first meter reading data and the second meter reading data:
if an ammeter which returns data according to the broadcasting address meter reading signal exists in the first meter reading data and the second meter reading data and does not return data according to the meter reading task signal, determining that the ammeter is an unlabeled ammeter; the unlabeled ammeter is an ammeter which does not have ammeter addresses.
6. The intelligent measurement method for branch line loss according to claim 5, further comprising, after said determining that the electric meter is an unlabeled electric meter:
reading and recording the ammeter addresses of the unlabeled ammeter, and reporting to a master station for verification; wherein the electricity meter address includes a measurement point and meter address data.
7. The method for intelligently measuring the line loss of the branch line according to claim 1, wherein determining the line loss of the branch line to be measured according to the total power consumption, the first meter reading data, the second meter reading data and the third meter reading data comprises:
judging the electricity consumption of all the electric meters in the branch circuit to be tested according to the first meter reading data, the second meter reading data and the third meter reading data;
and subtracting the electricity consumption of all the electricity meters from the total electricity consumption of the branch circuit to be tested to obtain the line loss of the branch circuit to be tested.
8. An intelligent measuring device for branch line loss, for executing the intelligent measuring method for branch line loss according to any one of claims 1 to 7, comprising a concentrator, a main data processor, a signal transmitting unit, a first signal receiving unit, and a second signal receiving unit;
the concentrator is used for communicating with the main station, storing ammeter address data on the branch circuit to be tested and obtaining the total electricity consumption of the branch circuit to be tested; the concentrator is also used for receiving meter reading periods and meter reading tasks issued by the master station or locally set to the master data processor;
the main data processor is used for reading the ammeter address data stored in the concentrator and on the branch circuit to be tested, generating a meter reading task according to the ammeter address data, and sending the meter reading task to the signal transmitting unit;
the signal transmitting unit is used for transmitting meter reading task signals and broadcast address meter reading signals to a plurality of electric meters on the branch line to be tested according to the meter reading task;
the first signal receiving unit and the second signal receiving unit are positioned at different positions on the branch line, the distance between the first signal receiving unit and the main line is smaller than that between the second signal receiving unit and the main line, and the first signal receiving unit is used for receiving the ammeter return data, marking the received time point and sending the received time point to the main data processor as first meter reading data; the second signal receiving unit is used for receiving the ammeter return data, marking the received time point and sending the received time point as second meter reading data to the main data processor;
the main data processor is also used for judging an ammeter positioned at the second half section of the branch line to be tested according to the receiving time of the first meter reading data and the receiving time of the second meter reading data; the main data processor is also used for marking abnormal ammeter data of positive correlation, negative correlation, sudden increase, sudden decrease, voltage loss, current differential and illegal uncovering of the ammeter electric quantity and the total electricity consumption in the statistical period according to the line loss of the branch line to be detected, and sending the abnormal ammeter data to the concentrator.
9. The intelligent branch line loss measurement device according to claim 8, further comprising a current transformer and a voltage sampler, wherein the current transformer is configured to obtain real-time current information of the branch line to be measured, and send the real-time current information to the concentrator;
the voltage sampler is used for acquiring real-time voltage information of the branch circuit to be tested and sending the real-time voltage information to the concentrator.
10. The branch line loss intelligent measurement device of claim 8, further comprising a data storage unit for storing data of the main data processor and the concentrator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311254409.1A CN117330864A (en) | 2023-09-25 | 2023-09-25 | Intelligent measuring method and device for line loss of branch line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311254409.1A CN117330864A (en) | 2023-09-25 | 2023-09-25 | Intelligent measuring method and device for line loss of branch line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117330864A true CN117330864A (en) | 2024-01-02 |
Family
ID=89289581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311254409.1A Pending CN117330864A (en) | 2023-09-25 | 2023-09-25 | Intelligent measuring method and device for line loss of branch line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117330864A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117761468A (en) * | 2024-02-22 | 2024-03-26 | 国网甘肃省电力公司张掖供电公司 | multi-parameter operation state monitoring method and system for new energy power station |
-
2023
- 2023-09-25 CN CN202311254409.1A patent/CN117330864A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117761468A (en) * | 2024-02-22 | 2024-03-26 | 国网甘肃省电力公司张掖供电公司 | multi-parameter operation state monitoring method and system for new energy power station |
| CN117761468B (en) * | 2024-02-22 | 2024-05-24 | 国网甘肃省电力公司张掖供电公司 | Multi-parameter operation state monitoring method and system for new energy power station |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110943450B (en) | Platform area automatic topology line loss analysis method based on Internet of things | |
| US7877218B2 (en) | Signal outage detection | |
| CN102866375B (en) | System and method for calibrating receiving performance of partial-discharge ultrahigh frequency detection device | |
| CN104076321B (en) | On-line monitoring and evaluating system and method for digital electric energy meter | |
| CN202383278U (en) | Merging unit sampling value time delay measuring system | |
| CN117330864A (en) | Intelligent measuring method and device for line loss of branch line | |
| CN202854315U (en) | System for calibrating receiving performance of partial-discharge ultrahigh frequency detection device | |
| CN107589391B (en) | Method, device and system for detecting integral error of electric energy metering device | |
| Xia et al. | GTHI: A heuristic algorithm to detect malicious users in smart grids | |
| CN105301552A (en) | Electric energy metering device online verification system | |
| CN106443562A (en) | Networked online inspection system for electric energy metering devices | |
| CN109636663B (en) | Method and device for identifying household transformer relationship of back-to-back distribution transformer | |
| CN109633327A (en) | A kind of area's intelligence line loss analytical equipment | |
| Music et al. | Integrated power quality monitoring system and the benefits of integrating smart meters | |
| CN201467137U (en) | On-line channel testing terminal | |
| CN112381467A (en) | Artificial intelligence line loss analysis system based on big data of distribution station district total collection | |
| CN104392603B (en) | A kind of live power information collecting device intelligent diagnosis system | |
| CN112269364A (en) | Fault positioning self-testing system and method | |
| CN113281609A (en) | Active traveling wave positioning method, system and storage medium for power distribution network fault based on multiple sampling points | |
| CN116799949A (en) | Method and device for monitoring electric power of low-voltage transformer area | |
| CN110077815A (en) | A kind of error testing system and method for current transformer test assembly line | |
| CN206074795U (en) | The online checking system of electric power meter networking | |
| CN112147409B (en) | Online impedance detection method and device for low-voltage distribution line | |
| CN115207909A (en) | Method, device, equipment and storage medium for identifying platform area topology | |
| CN110736609B (en) | Optical port power testing method based on automatic matching |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |