CN114296023A - Low-voltage transformer area metering device operation error diagnosis and analysis method and system - Google Patents
Low-voltage transformer area metering device operation error diagnosis and analysis method and system Download PDFInfo
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Abstract
The invention discloses a method and a system for diagnosing and analyzing operation errors of a metering device in a low-voltage transformer area, wherein the method comprises the following steps: s1) carrying out operation error diagnosis on the ammeter in the distribution box along with the box metering device operation error diagnosis analysis equipment, and sending a diagnosis result and data for diagnosis to a control center; s2) the control center compares the diagnosis results of the error diagnosis analysis equipment operated by the adjacent box-following metering devices in the geographical position, compares the abnormal diagnosis result data with the normal diagnosis result data, confirms whether the abnormal result is not misjudged, and sends a detection maintenance task to the maintenance personnel client if the abnormal result is not misjudged. The method utilizes the diagnosis and analysis of the operation error of the metering device in the electric energy meter to eliminate the operation error of the electric energy meter caused by the self problem of the electric energy meter so as to timely process the electric energy meter with problems, and simultaneously utilizes the operation error judgment of the metering device in the electric energy meter to judge whether the electricity stealing behavior exists in a user.
Description
Technical Field
The invention relates to the technical field of power grids. In particular to a method and a system for diagnosing and analyzing the operation error of a metering device in a low-voltage transformer area.
Background
When the electric energy meter access circuit measures the electricity consumption, the electricity consumption is generally measured by a measuring device in the electric energy meter. The metering device comprises a current converter, a voltage converter and a multiplier, and the operation errors of the current converter, the voltage converter and the multiplier have certain influence on the operation errors of the electric energy meter, so that when the operation errors of the electric energy meter are monitored, the operation errors of the metering device in the electric energy meter are considered in addition to the problems of a power supply line. The electric energy meters are checked one by one, so that the workload is large, the repeatability is high, and the change is easily caused by the change of the use environment.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to provide a method and a system for diagnosing and analyzing the operation error of the metering device in the low voltage transformer area, which utilizes the diagnostic analysis of the operation error of the metering device in the electric energy meter to eliminate the operation error of the electric energy meter caused by the problem of the electric energy meter, so as to process the electric energy meter with the problem in time, and utilizes the operation error judgment of the metering device in the electric energy meter to judge whether the electricity stealing behavior exists in the user.
In order to solve the technical problems, the invention provides the following technical scheme:
the method for diagnosing and analyzing the operation error of the metering device in the low-voltage transformer area comprises the following steps of:
s1) carrying out operation error diagnosis on the ammeter in the distribution box along with the box metering device operation error diagnosis analysis equipment, and sending a diagnosis result and data for diagnosis to a control center, wherein the method specifically comprises the following steps:
s1-1) collecting data related to the electric energy metering device in each electric meter in the distribution box, and carrying out corresponding operation error diagnosis on each electric meter according to the collected data;
s1-2) packing the diagnosis result and the data for diagnosis and sending the data to a control center;
s2) the control center compares the diagnosis results of the error diagnosis analysis equipment operated by the adjacent box-following metering devices in the geographical position, compares the abnormal diagnosis result data with the normal diagnosis result data, confirms whether the abnormal result is not misjudged, and sends a detection maintenance task to the maintenance personnel client if the abnormal result is not misjudged.
In step S1-1), the control center sets a policy for diagnosing operation errors of the electric meters in the distribution box along with the box metering device operation error diagnostic analysis equipment according to daily electricity consumption data of the user, where the policy is to randomly perform n times of operation error diagnosis and m times of operation error diagnosis at regular time for the electric meters in the distribution box during the peak period of electricity consumption, and randomly perform j times of operation error diagnosis and k times of operation error diagnosis for the electric meters in the distribution box during the valley period of electricity consumption, where n, m, j, and k are natural numbers greater than or equal to 5 and less than or equal to 10.
According to the method for diagnosing and analyzing the operation errors of the metering device in the low-voltage transformer area, the interval time between two adjacent random operation error diagnoses is 15-30 min.
According to the method for diagnosing and analyzing the operation errors of the metering device in the low-voltage transformer area, the interval between the adjacent two times of operation error diagnosis performed regularly is 20-40 min.
In the method for diagnosing and analyzing the operation errors of the metering device in the low-voltage transformer area, in step S1), the equipment for diagnosing and analyzing the operation errors of the metering device along with the box also diagnoses the total operation errors of all the electric meters in the whole distribution box.
According to the method for diagnosing and analyzing the operation errors of the metering device in the low-voltage transformer area, the equipment for diagnosing and analyzing the operation errors of the metering device along with the box at least comprises a data acquisition unit, a data analysis unit, a data storage unit and a communication unit, wherein the data acquisition unit is in communication connection with the data storage unit, the data storage unit is in communication connection with the data analysis unit, and the data analysis unit is in communication connection with the control center through the communication unit.
In step S1), the electric energy metering device in the electric meter includes a current converter, a voltage converter and a multiplier, when acquiring data related to the electric energy metering device in each electric meter in the distribution box, the data related to the current converter, the voltage converter and the multiplier are not acquired simultaneously when acquiring data related to the current converter, the voltage converter and the multiplier, and at most one data acquisition is performed between two data acquisitions of any one device among the current converter, the voltage converter and the multiplier as a data set acquisition not including the device; in step S2), before the control center compares the diagnosis results of the operation error diagnosis analysis equipment of the metering devices with boxes in adjacent geographical positions, the control center compares the diagnosis results with the standard operation errors of the electric meters, and if the diagnosis results are within the threshold range, the diagnosis results are considered to be normal, otherwise, the diagnosis results are considered to be abnormal.
The standard operation error of the electric meter is xi0，ξ0＝(k1ξ1+k2ξ2+k3ξ3) /3 wherein k1For the current converter operating error correction factor, ξ1For the operating error of the current transformer, k2Operating error correction factor, xi, for voltage converters2For voltage converter operating errors, k3Running error correction coefficients, ξ, for multipliers3The error is run for the multiplier. Standard running error xi0The humidity is measured and calculated when the equipment is at normal temperature and normal humidity, the normal temperature is 20 ℃, and the normal humidity is 30% of relative humidity. k is a radical of1、k2And k3Is based on the standard running error xi after the related data of each metering device are changed0The specific values of the influence of the environmental factors are influenced by the climate environment of each region.
The system for diagnosing and analyzing the operation error of the low-voltage transformer area metering device by using the method for diagnosing and analyzing the operation error of the low-voltage transformer area metering device comprises the following steps:
the box following metering device operation error diagnosis and analysis equipment is used for diagnosing operation errors of the electric meter in the distribution box; the box-following metering device operation error diagnosis and analysis equipment at least comprises a data acquisition unit, a data analysis unit, a data storage unit and a communication unit;
the control center is used for analyzing the diagnosis result;
the data acquisition unit is in communication connection with the data storage unit, the data storage unit is in communication connection with the data analysis unit, and the data analysis unit is in communication connection with the control center through the communication unit.
In the system, two adjacent box-following metering devices are in running error diagnosis and analysis equipment and are in communication connection through the communication unit.
The technical scheme of the invention achieves the following beneficial technical effects:
1. the operation error diagnosis and analysis equipment of the metering device along with the box is used for sharing the operation error diagnosis and analysis work of the metering device in the electric meter, which is originally carried out in the control center, so that the operation pressure of the control center is reduced.
2. The different metering devices are used for separately acquiring data, so that the method is favorable for determining which metering equipment has faults, and is also favorable for determining which metering equipment is greatly interfered by external factors.
3. Different data acquisition strategies are adopted at the peak and the valley of the power utilization, which is beneficial to finding out the possible problems of the metering device in different time periods, such as the problem of stealing power at the peak of the power utilization.
Drawings
FIG. 1 is a schematic view of the operation principle of a low-voltage area metering device operation error diagnosis and analysis system;
FIG. 2 is a flow chart of a method for diagnosing and analyzing operation errors of a metering device of a low-pressure area.
Detailed Description
As shown in fig. 1, the system for diagnosing and analyzing the operation error of the metering device in the low-pressure area of the invention comprises:
the box following metering device operation error diagnosis and analysis equipment is used for diagnosing operation errors of the electric meter in the distribution box; the box-following metering device operation error diagnosis and analysis equipment at least comprises a data acquisition unit, a data analysis unit, a data storage unit and a communication unit;
the control center is used for analyzing the diagnosis result;
the data acquisition unit is in communication connection with the data storage unit, the data storage unit is in communication connection with the data analysis unit, the data analysis unit is in communication connection with the control center through the communication unit, and the two adjacent box-following metering devices operation error diagnosis analysis equipment are in communication connection through the communication unit.
The system is used for diagnosing and analyzing the operation error of the metering device of the low-voltage transformer area, the specific flow is shown in figure 2, and the method comprises the following steps:
s1) carrying out operation error diagnosis on the ammeter in the distribution box along with the box metering device operation error diagnosis analysis equipment, and sending a diagnosis result and data for diagnosis to a control center, wherein the method specifically comprises the following steps:
s1-1) collecting data related to the electric energy metering device in each electric meter in the distribution box, and carrying out corresponding operation error diagnosis on each electric meter according to the collected data;
s1-2) packing the diagnosis result and the data for diagnosis and sending the data to a control center;
s2) the control center compares the diagnosis results of the error diagnosis analysis equipment operated by the adjacent box-following metering devices in the geographical position, compares the abnormal diagnosis result data with the normal diagnosis result data, confirms whether the abnormal result is not misjudged, and sends a detection maintenance task to the maintenance personnel client if the abnormal result is not misjudged.
In the embodiment, in step S1-1), the control center sets a strategy for diagnosing the operation error of the electricity meter in the distribution box by the operation error diagnostic analysis equipment of the box metering device according to the daily electricity consumption data of the user, the strategy is to randomly carry out n times of operation error diagnosis and m times of operation error diagnosis on the electric meter in the distribution box at regular time in the peak period of electricity consumption, and the electricity meter in the distribution box is randomly subjected to j times of operation error diagnosis and k times of operation error diagnosis at regular time in the electricity consumption valley period, wherein n, m, j and k are natural numbers which are more than or equal to 5 and less than or equal to 10, the interval time between two adjacent random operation error diagnoses is 15-30 min, the interval time between two adjacent timing operation error diagnoses is 20-40 min, and the specific interval time is adjusted correspondingly according to actual operation. Wherein, by utilizing the operation error diagnosis strategy of combining random operation error diagnosis and timing operation error diagnosis,
in step S1), the running error diagnosis analyzing apparatus also performs a total running error diagnosis on all the electricity meters in the entire distribution box along with the box metering device.
In this embodiment, in step S1), the electric energy metering device in the electric meter includes a current converter, a voltage converter, and a multiplier, when data related to the electric energy metering device in each electric meter in the distribution box is collected, the data related to the current converter, the voltage converter, and the multiplier are not collected at the same time when the data related to the current converter, the voltage converter, and the multiplier are collected, and at most one data collection between two data collections of any one device among the current converter, the voltage converter, and the multiplier is a data set collection not including the device; in step S2), before the control center compares the diagnosis results of the operation error diagnosis analysis equipment of the metering devices with boxes in adjacent geographical positions, the control center compares the diagnosis results with the standard operation errors of the electric meters, and if the diagnosis results are within the threshold range, the diagnosis results are considered to be normal, otherwise, the diagnosis results are considered to be abnormal. Wherein the standard operation error of the electric meter is ξ0，ξ0＝(k1ξ1+k2ξ2+k3ξ3) /3 wherein k1For the current converter operating error correction factor, ξ1For the operating error of the current transformer, k2Operating error correction factor, xi, for voltage converters2For voltage converter operating errors, k3Running error correction coefficients, ξ, for multipliers3The error is run for the multiplier. Standard running error xi0The humidity is measured and calculated when the equipment is at normal temperature and normal humidity, the normal temperature is 20 ℃, and the normal humidity is 30% of relative humidity. k is a radical of1、k2And k3Is based on the standard running error xi after the related data of each metering device are changed0The specific values of the influence of the environmental factors are influenced by the climate environment of each region.
When the diagnosis results of the operation error diagnosis and analysis equipment of the adjacent box-following metering devices in the geographic position are compared, the influence of environmental factors (temperature, humidity and the like) on the operation error of the metering devices can be reduced or ignored, and the equipment with abnormal operation can be judged more accurately. Meanwhile, when the operation error diagnosis of the metering device is carried out, a data acquisition strategy that data related to the current converter, the voltage converter and the multiplier are not acquired simultaneously when data related to the current converter, the voltage converter and the multiplier are selected to be acquired, and data acquisition is carried out at most once between two times of data acquisition of any one device of the current converter, the voltage converter and the multiplier as data set acquisition without the device is selected, so that a specific problem in the current converter, the voltage converter and the multiplier can be quickly confirmed, and the method can be used for judging whether a power stealing behavior exists by a user.
After the error diagnosis and analysis method for the operation error of the metering device in the low-voltage transformer area is adopted to carry out error diagnosis and analysis on the metering device in the electric energy meter in the low-voltage transformer area, the fault diagnosis accuracy of the metering device in the electric energy meter is improved to 97% from the original 84%, the replacement rate of the electric energy meter is reduced to 87% from the original 93%, wherein only one of a current converter, a voltage converter or a multiplier needs to be replaced for a plurality of electric energy meters, the actual service life of the electric energy meters is prolonged, and meanwhile, the cost for replacing the electric energy meters by a user is saved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are possible which remain within the scope of the appended claims.
Claims (10)
1. The method for diagnosing and analyzing the operation errors of the metering device in the low-voltage transformer area is characterized by comprising the following steps of:
s1) carrying out operation error diagnosis on the ammeter in the distribution box along with the box metering device operation error diagnosis analysis equipment, and sending a diagnosis result and data for diagnosis to a control center, wherein the method specifically comprises the following steps:
s1-1) collecting data related to the electric energy metering device in each electric meter in the distribution box, and carrying out corresponding operation error diagnosis on each electric meter according to the collected data;
s1-2) packing the diagnosis result and the data for diagnosis and sending the data to a control center;
s2) the control center compares the diagnosis results of the error diagnosis analysis equipment operated by the adjacent box-following metering devices in the geographical position, compares the abnormal diagnosis result data with the normal diagnosis result data, confirms whether the abnormal result is not misjudged, and sends a detection maintenance task to the maintenance personnel client if the abnormal result is not misjudged.
2. The method for diagnosing and analyzing the operation errors of the metering devices of the low-voltage transformer area according to claim 1, wherein in step S1-1), the control center sets a strategy for diagnosing the operation errors of the electric meters in the distribution box along with the box metering device operation error diagnosis and analysis equipment according to the daily electricity consumption data of the user, the strategy is to randomly perform n times of operation error diagnosis and m times of operation error diagnosis at regular time on the electric meters in the distribution box in the peak electricity consumption period, and randomly perform j times of operation error diagnosis and k times of operation error diagnosis on the electric meters in the distribution box in the valley electricity consumption period, wherein n, m, j and k are natural numbers which are greater than or equal to 5 and less than or equal to 10.
3. The method for diagnosing and analyzing the operation errors of the metering device of the low-pressure transformer area as claimed in claim 2, wherein the interval between two adjacent random operation error diagnoses is 15-30 min.
4. The method for diagnosing and analyzing the operation error of the metering device of the low-pressure transformer area as claimed in claim 2, wherein the interval between the operation error diagnoses conducted at two adjacent times is 20-40 min.
5. The method for diagnosing and analyzing the operation errors of the metering device of the low voltage transformer area as claimed in claim 1, wherein in step S1), the equipment for diagnosing and analyzing the operation errors of the metering device of the low voltage transformer area also diagnoses the total operation errors of all the electric meters in the whole distribution box.
6. The method for diagnosing and analyzing the operation errors of the metering device of the low-voltage transformer area according to any one of claims 1 to 5, wherein the equipment for diagnosing and analyzing the operation errors of the metering device along with the box at least comprises a data acquisition unit, a data analysis unit, a data storage unit and a communication unit, wherein the data acquisition unit is in communication connection with the data storage unit, the data storage unit is in communication connection with the data analysis unit, and the data analysis unit is in communication connection with the control center through the communication unit.
7. The method for diagnosing and analyzing the operation error of the metering device in the low-voltage transformer area according to any one of claims 1 to 5, wherein in the step S1), the electric energy metering device in each electric meter comprises a current converter, a voltage converter and a multiplier, when data related to the electric energy metering device in each electric meter in the distribution box is collected, the data related to the current converter, the voltage converter and the multiplier are not collected at the same time when the data related to the current converter, the voltage converter and the multiplier are collected, and at most one data collection is adopted as a data set collection without any device between two data collections of any one device in the current converter, the voltage converter and the multiplier; in step S2), before the control center compares the diagnosis results of the operation error diagnosis analysis equipment of the metering devices with boxes in adjacent geographical positions, the control center compares the diagnosis results with the standard operation errors of the electric meters, and if the diagnosis results are within the threshold range, the diagnosis results are considered to be normal, otherwise, the diagnosis results are considered to be abnormal.
8. The method of claim 7, wherein the standard operating error of the electric meter is ξ0，ξ0＝(k1ξ1+k2ξ2+k3ξ3) /3 wherein k1For the current converter operating error correction factor, ξ1For the operating error of the current transformer, k2Operating error correction factor, xi, for voltage converters2For voltage converter operating errors, k3Running error correction coefficients, ξ, for multipliers3The error is run for the multiplier.
9. The system for diagnosing and analyzing the operation error of the low-voltage transformer area metering device by using the method for diagnosing and analyzing the operation error of the low-voltage transformer area metering device as claimed in any one of claims 1 to 8 is characterized by comprising the following steps of:
the box following metering device operation error diagnosis and analysis equipment is used for diagnosing operation errors of the electric meter in the distribution box; the box-following metering device operation error diagnosis and analysis equipment at least comprises a data acquisition unit, a data analysis unit, a data storage unit and a communication unit;
the control center is used for analyzing the diagnosis result;
the data acquisition unit is in communication connection with the data storage unit, the data storage unit is in communication connection with the data analysis unit, and the data analysis unit is in communication connection with the control center through the communication unit.
10. The system of claim 9, wherein two adjacent tank-following metering device operation error diagnosis and analysis apparatuses are communicatively connected through a communication unit.
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Cited By (1)
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