CN115561699A - Operation error estimation method and device - Google Patents
Operation error estimation method and device Download PDFInfo
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- CN115561699A CN115561699A CN202211546166.4A CN202211546166A CN115561699A CN 115561699 A CN115561699 A CN 115561699A CN 202211546166 A CN202211546166 A CN 202211546166A CN 115561699 A CN115561699 A CN 115561699A
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Abstract
The invention relates to the technical field of data analysis, and provides a method and a device for estimating running errors, wherein the method comprises the following steps: determining a plurality of energy conservation units in a topological relation based on the topological relation of the electric energy meters in the transformer area; the energy conservation relation is satisfied among the plurality of electric energy meters in each energy conservation unit; establishing an energy conservation equation set based on the energy conservation relations corresponding to the energy conservation units respectively; and determining the operation error of the electric energy meter in the transformer area based on the energy conservation equation set. The invention realizes the effective utilization of topological information of the electric energy meters in different levels, improves the accuracy of error estimation and enlarges the supervision range of the electric energy meters in the transformer area.
Description
Technical Field
The invention relates to the technical field of data analysis, in particular to a method and a device for estimating running errors.
Background
With the development of data analysis technology, an online misalignment error monitoring model of an intelligent electric energy meter becomes a new means for evaluating and monitoring the operation quality of the intelligent electric energy meter, the model obtains an error coefficient of electric meter measurement by calibrating the energy conservation relation between a total meter and a sub meter, and estimates the operation error of the electric energy meter according to the error coefficient, so that the intelligent electric energy meter is remotely monitored in real time.
However, when there is a problem in some meters themselves or in meter collection, the energy conservation relationship between the general meter and the sub-meters is destroyed. At this time, the energy conservation relation between the general table and the sub-table is still adopted for error estimation, so that the accuracy of error estimation is greatly reduced.
Disclosure of Invention
The invention provides a method and a device for estimating running errors, which are used for overcoming the defect of low accuracy of error estimation in the prior art, realizing effective utilization of topological information of electric energy meters in different levels and improving the accuracy of error estimation.
The invention provides an operation error estimation method, which comprises the following steps:
determining a plurality of energy conservation units in a topological relation based on the topological relation of the electric energy meters in the transformer area; the energy conservation relation is satisfied among the plurality of electric energy meters in each energy conservation unit;
establishing an energy conservation equation set based on the energy conservation relations corresponding to the energy conservation units respectively;
and determining the operation error of the electric energy meter in the transformer area based on the energy conservation equation set.
According to an operation error estimation method provided by the invention, the plurality of electric energy meters comprise a first electric energy meter and at least one second electric energy meter which are deployed at two adjacent levels in the topological relation, and the level of the first electric energy meter is higher than that of the second electric energy meter;
wherein the first electric energy meter at a higher hierarchy level and the at least one second electric energy meter at a lower hierarchy level satisfy an energy conservation relationship.
According to the operation error estimation method provided by the invention, the establishing of the energy conservation equation set based on the energy conservation relations corresponding to the energy conservation units respectively comprises the following steps:
according to the energy conservation relations corresponding to the energy conservation units, eliminating the energy conservation units which do not meet preset conditions from the energy conservation units to obtain a plurality of target energy conservation units; the preset conditions comprise that the acquisition success rate of the electric energy meter is greater than a first numerical value and/or the line loss rate of the electric energy meter is less than a second numerical value;
and establishing the energy conservation equation set based on the energy conservation relations corresponding to the target energy conservation units respectively.
According to the operation error estimation method provided by the invention, the establishing of the energy conservation equation set based on the energy conservation relation corresponding to each of the target energy conservation units comprises the following steps:
determining electric quantity data corresponding to the target energy conservation units respectively based on the energy conservation relations corresponding to the target energy conservation units respectively; the electric quantity data comprises electric quantity, a line loss item, a solid loss item and an operation error item;
establishing energy conservation equations corresponding to the target energy conservation units on the basis of the electric quantity data corresponding to the target energy conservation units;
and establishing the energy conservation equation set based on the energy conservation equations respectively corresponding to the target energy conservation units.
According to the operation error estimation method provided by the invention, the operation error of the electric energy meter in the transformer area is determined based on the energy conservation equation set, and the method comprises the following steps:
determining operation error terms corresponding to the energy conservation units as fitting targets;
solving the energy conservation equation set based on the fitting target to obtain an error coefficient of the electric energy meter in the distribution room;
and determining the operation error of the electric energy meter in the transformer area based on the error coefficient of the electric energy meter in the transformer area.
According to the operation error estimation method provided by the invention, solving the energy conservation equation set based on the fitting target to obtain the error coefficient of the electric energy meter in the distribution room comprises the following steps:
and solving the energy conservation equation set by adopting a linear regression method based on the fitting target to obtain an error coefficient of the electric energy meter in the distribution room.
The present invention also provides an operation error estimating apparatus, including:
the unit dividing module is used for determining a plurality of energy conservation units in the topological relation based on the topological relation of the electric energy meters in the transformer area; the energy conservation relation is satisfied among the plurality of electric energy meters in each energy conservation unit;
the equation building module is used for building an energy conservation equation set based on the energy conservation relations corresponding to the energy conservation units respectively;
and the output module is used for determining the operation error of the electric energy meter in the distribution room based on the energy conservation equation set.
According to the operation error estimation apparatus provided by the present invention, the equation building block establishes an energy conservation equation set based on the energy conservation relations corresponding to the plurality of energy conservation units, and the method includes:
according to the energy conservation relations corresponding to the energy conservation units, eliminating the energy conservation units which do not meet preset conditions from the energy conservation units to obtain a plurality of target energy conservation units; the preset conditions comprise that the acquisition success rate of the electric energy meter is greater than a first numerical value and/or the line loss rate of the electric energy meter is less than a second numerical value;
and establishing the energy conservation equation set based on the energy conservation relations corresponding to the target energy conservation units respectively.
The present invention also provides an operation error estimating apparatus, including:
the input module is used for determining the electricity consumption of electric energy meters in different levels in the distribution room;
the unit dividing module is used for determining a plurality of energy conservation units in the distribution area based on the energy conservation relation between the electricity consumption of the electric energy meters in adjacent levels in the distribution area;
the system of equations building module is used for building an energy conservation equation based on each energy conservation unit in the transformer area and determining an energy conservation equation set in the transformer area;
and the output module is used for solving the energy conservation equation set and determining the operation error of the electric energy meter in the transformer area.
According to the running error estimation device provided by the invention, the equation building module further comprises a screening module;
the screening module is used for removing the energy conservation units which do not meet the preset conditions from the plurality of energy conservation units according to the energy conservation relations corresponding to the plurality of energy conservation units respectively to obtain a plurality of target energy conservation units; the preset conditions comprise that the acquisition success rate of the electric energy meter is greater than a first numerical value and/or the line loss rate of the electric energy meter is less than a second numerical value;
the equation building module is further used for building the energy conservation equation set based on the energy conservation relations corresponding to the target energy conservation units respectively.
The present invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method for estimating the operation error as described in any of the above methods when executing the program.
The present invention also provides a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method of operating error estimation as described in any of the above.
The present invention also provides a computer program product comprising a computer program which, when executed by a processor, implements a method of operating error estimation as described in any one of the above.
According to the operation error estimation method and device provided by the invention, a plurality of energy conservation units in the distribution area are determined by effectively utilizing the topological relation of the electric energy meters in the distribution area, then an energy conservation equation is constructed based on the energy conservation relation among the electric energy meters in different topological levels, and an augmented energy conservation equation is constructed by sharing error coefficients among different units for the same electric energy meter. Then, the equation set is solved through the same method, so that the operation errors of all the electric energy meters in the distribution area can be obtained, and the convenience degree of operation error solving is effectively improved. Because the transformer area is divided into the plurality of small energy conservation units, the energy conservation units of certain meters can be influenced only when the meters are abnormal, and the influence on the energy conservation units of other normal meters can be ensured. The operation errors of most electric meters belong to an estimable state, which is very remarkable in improvement of the supervision range and stability of the online monitoring model of the misalignment errors of the intelligent electric meter.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for estimating an operating error of an electric energy meter according to the present invention;
FIG. 2 is a second schematic flow chart of the method for estimating the operating error of the electric energy meter according to the present invention;
FIG. 3 is a schematic structural diagram of an apparatus for estimating an operating error of an electric energy meter according to the present invention;
fig. 4 is a schematic structural diagram of an electronic device provided in the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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.
In the online monitoring model for the misalignment error of the intelligent ammeter in the traditional method, the error coefficient of the metering of the ammeter is obtained by calibrating the energy conservation relation between the master meter and the sub-meters, so that the operation error of the electric energy meter is obtained. The model finely expresses the line loss item of the transformer area, so that the running error of the electric energy meter is more accurately estimated.
It should be noted that, in the embodiment of the present invention, based on the law of conservation of energy, the finally established online monitoring model for misalignment error of the smart meter is shown in formula 1:
wherein the content of the first and second substances,
an electricity matrix for a summary table representing the power supply area is in the shape of
，
The number of the time points is measured and corresponds to the total number of the equation, and each point is the electricity consumption in the measurement interval.
The power matrix for all users (sub-tables) in the station area is represented in the shape of
Each row measures the electricity consumption of each user in the interval,
is the number of the user table.
The error coefficient of each sub-table under the table area is represented in the shape of
。
Represents a line loss term matrix constructed in an energy conservation equation and has the shape of
，
The number of line loss terms added to construct the equation.
The line loss coefficient corresponding to each line loss term is expressed in the shape of
The physical meaning is equivalent resistance.
The loss constant is represented, and the sum of the losses under the transformer area is represented, wherein the losses generally come from the losses of the intelligent electric meter.
In the current online misalignment error monitoring model of the intelligent electric meter, the model is solved only based on the primary energy conservation relation of the general table and the sub table, when a part of electric meters have data problems, the energy conservation relation of the general table and the sub table is damaged, and under the existing scheme, other electric meters can be in an unsupervised state. However, the conservation relationships between other meters are still true, removing the meter in question. Therefore, if the energy conservation relation among other electric meters can be obtained by effectively utilizing the topological relation of the platform area, the operation errors of most electric meters can still be ensured to be in an estimable state, and the supervision range and the stability of the misalignment model are certainly greatly improved. How to reasonably and effectively utilize the topological relation of the transformer area to realize the supervision of the electric energy meter in a wider range is an important aim of the invention.
The guide rail meter is a metering device additionally arranged in a node of a platform area topology, is generally arranged in a meter box and a metering cabinet and is used for dividing a platform area into units and metering the sub-meter power consumption of the units below the platform area. Therefore, the guide rail table can serve as an energy conservation unit for dividing the station area into different areas, when the guide rail table is additionally arranged in the station area, the existing method usually ignores rich information brought by the additionally arranged guide rail table, and still carries out error estimation according to the original method, so that the accuracy of model estimation is greatly reduced. For the zones where the guideway tables are present, the current methods are clearly inadequate to utilize the information, and discarding this additional information results in room for improvement that generally loses a portion of the accuracy of the model.
An operation error estimation method according to an embodiment of the present invention is described below with reference to fig. 1-2, where the method shown in fig. 1 at least includes the following steps:
102, establishing an energy conservation equation set based on energy conservation relations corresponding to the energy conservation units respectively;
and 103, determining the operation error of the electric energy meter in the transformer area based on the energy conservation equation set.
In step 101, it should be noted that the topological relation of the electric energy meters in the distribution room is a basic link and a key part of intelligent electric meters, power consumption information acquisition and distribution room electric energy fine management. In the embodiment of the invention, the topological relation specifically refers to the connection and attribution relation between the total table of the electric energy meters in the transformer area and the sub-tables of the electric energy meters of the users; the connection and affiliation relationship between the station electric energy meter master meter and the electric energy meter sub-meters of each company in the industrial park can also be adopted; the connection and affiliation relationship between the main electric energy meter of the transformer area and each sub-electric energy meter of each user and each sub-electric energy meter of the company in the business and residential dual-purpose park can be realized; and the connection and affiliation relationship between the electric energy meter general meters and the electric energy meter sub-meters of each household in each building in the community and the like can be realized. On the basis of the technical description of this scenario, those skilled in the art can use corresponding technical means in the similar scenario of the above example without creative work, and further description is omitted here.
Because the guide rail table is added in the platform area under the application scene, the guide rail table and the lower branch table thereof, the platform area summary table and the guide rail table, and the upper level guide rail table and the lower level guide rail table form a multi-level energy conservation relation in the embodiment of the invention. Theoretically, in a specific application scenario of a transformer area, the electric energy data satisfy an energy conservation relation that the input electric energy of the transformer area (an electric energy meter master meter) is equal to the sum of all user electric energy data (electric energy meter branch meters). In an actual scene, line loss and errors of the electric energy metering device certainly exist, so that the electric energy conservation relation is a relative relation and is not an absolute strict equivalent relation in a data meaning. One necessary and sufficient condition for the topological relation of the electric energy meters in the transformer area to be correct is as follows: a unique set of electric energy data can be found, and the relative station area electric energy conservation relation can be met at each time point. The guide rail meter is used for dividing the platform area into units and metering the sub-meter electricity consumption of the units below the platform area. Therefore, the table area can be divided into a plurality of energy conservation units by the guide rail table, wherein the summary table can be used as the guide rail table at the uppermost layer.
For step 102, it should be noted that, in the embodiment of the present invention, a multi-topology-level energy conservation equation set is constructed, and the multi-topology-level energy conservation equation set includes a summary table-a guide rail table, a higher-level guide rail table-a lower-level guide rail table, a guide rail table-a sub-table, and other levels. Because the same electric energy meters contained in different equation sets can share the error coefficient, the obtained augmented energy conservation equation set can effectively solve the problem that the operation error of a normal electric meter is difficult to estimate when the energy conservation relation between a general meter and a branch meter is not met after a part of electric meters have problems.
For step 103, it should be noted that the energy conservation equation set may be solved by a conventional method, such as a linear regression method, to obtain error coefficients of all the electric meters including the rail meter under the distribution area, and then substituted back into the misalignment error online monitoring model of the smart electric meter according to the error coefficients, so as to obtain statistical line loss fluctuation, i.e. operation error, which cannot be fitted.
The operation error estimation method of the invention determines a plurality of energy conservation units in the transformer area by effectively utilizing the topological relation of the electric energy meters in the transformer area. Then, an energy conservation equation is constructed based on the energy conservation units, and error coefficients are shared among different units for the same ammeter to obtain an augmented energy conservation equation. And then solving the equation set through a linear regression method to obtain the operation errors of all the electric energy meters in the distribution room, thereby effectively improving the convenience degree of operation error solving. Because the transformer area is divided into a plurality of small energy conservation units, the energy conservation units of certain meters can be influenced when the meters are abnormal, the energy conservation units of other normal meters can still be ensured not to be influenced, and the error estimation precision is ensured.
It can be understood that, based on the topological relation of the electric energy meters in the block, determining the energy conservation relation between the electric energy meters in different levels in the block includes:
determining connection and affiliation relations among the general meter, the guide rail meter and the sub-meters based on the topological relation of the electric energy meters in the transformer area;
and determining the energy conservation relation among the electric energy meters of different levels in the transformer area according to the connection and attribution relations among the general meter, the guide rail meter and the sub-meters.
For convenience of consistency, the following summary does not use the formula 1 for power consumption
For indicating, the same as for all sub-tables, track-tables
Expressed in the equation constructed by the conventional method
Table arrangement in the distribution area
In this embodiment, the energy conservation relation between the electric energy meters at different levels in the distribution area is represented by the corresponding relation of the electric meter indexes.
Specifically, the representation of the corresponding relationship of the ammeter index is given by the tuple set corresponding as shown in formula 2:
wherein the content of the first and second substances,
is a summary table and a guide rail table index set,
as an index
And the index list of the adjacent subordinate ammeter of the corresponding ammeter.
It is understood that the plurality of electric energy meters comprises one first electric energy meter and at least one second electric energy meter deployed in two adjacent levels in a topological relationship;
the first electric energy meter at a higher level and the at least one second electric energy meter at a lower level satisfy an energy conservation relation.
It should be noted that the first electric energy meter is a rail meter for each energy conservation unit, and the second electric energy meter is all sub-meters in adjacent levels of the rail meter under the unit. Because the cross-level energy conservation relations (the general table-the sub table) can be obtained by combining the energy conservation relations of the adjacent levels (the general table-the guide rail table, the guide rail table-the sub table), the energy conservation units created in the embodiment of the invention are all minimum units, only the corresponding relations of the two adjacent levels are reserved, the cross-level corresponding relations are not required to be added repeatedly, redundant repeated energy conservation units are reduced, and the pressure of model calculation is reduced.
It can be understood that, based on the energy conservation relation corresponding to each of the plurality of energy conservation units, a system of energy conservation equations is established, including:
according to the energy conservation relations corresponding to the energy conservation units, eliminating the energy conservation units which do not meet preset conditions from the energy conservation units to obtain a plurality of target energy conservation units; the preset conditions comprise that the electric energy meter acquisition success rate is greater than a first numerical value and/or the electric energy meter line loss rate is less than a second numerical value;
and establishing an energy conservation equation set based on the energy conservation relations corresponding to the target energy conservation units respectively.
It should be noted that the preset condition is used for filtering the electric energy meter with abnormal data of the electric energy consumption of the energy conservation unit. The abnormal electricity consumption data may have two reasons, on one hand, the problem may be caused by the electricity meter itself, and on the other hand, the problem may also occur in the process of collecting the electricity consumption by the electricity meter, and both of the two reasons may cause that the electricity consumption data cannot be normally collected, that is, the electricity consumption data is abnormal.
Specifically, the energy conservation unit with the data exception filtered may be configured according to a plurality of preset conditions, for example, by querying whether a normal working duration of the electric meter in the energy conservation unit reaches a threshold or manually performing patrol check on the state of the electric meter. The preset conditions set in the embodiment of the invention are as follows: (1) The acquisition success rate of all the electric meters in the energy conservation unit is more than 80 percent. And (2) the absolute value of the line loss rate of the energy conservation unit is less than 5%. For the energy conservation unit which does not satisfy either of the conditions (1) or (2), the energy conservation unit is controlled to be started
Removing to obtain filtered platform area unit tuple set
。
Specifically, the acquisition success rate of the electric meter refers to the success rate of the electric meter acquiring the metering points within a certain time, for example, data of one metering point is acquired within 15 minutes in a day, and data of 96 metering points are acquired in total, wherein the acquisition success rate is obtained by dividing the number of the successfully acquired metering points by the total number of the metering points. For example, the index is
The absolute value of the line loss rate of the energy conservation unit corresponding to the guide rail table is shown as formula 3:
wherein the content of the first and second substances,
the representation index is
The sum of the power consumptions of the energy conservation units corresponding to the rail tables,
is expressed as an index
The sum of the electricity consumption of all sub-meters under the guide rail meter.
According to the operation error estimation method, the problematic units are removed before the energy conservation equation is established for each energy conservation unit, so that the calculation solution of other units is not influenced, the electric meters in the unaffected calculation units can still be normally monitored by the model on the platform area with the data problems, and the monitoring range of the misalignment model and the robustness to data abnormity are expanded.
It can be understood that, based on the energy conservation relation corresponding to each of the plurality of target energy conservation units, an energy conservation equation set is established, which includes:
determining electric quantity data corresponding to the target energy conservation units based on the energy conservation relations corresponding to the target energy conservation units; the electric quantity data comprises electricity consumption, a line loss item, a solid loss item and an operation error item;
establishing energy conservation equations corresponding to the target energy conservation units respectively based on the electric quantity data corresponding to the target energy conservation units respectively;
and establishing an energy conservation equation set based on the energy conservation equations corresponding to the target energy conservation units respectively.
It should be noted that, the embodiment of the present invention may set according to the filtered table region unit tuples
Constructing a multi-topology-level energy conservation equation system, and the sameIn the case of no abnormal table, all energy conservation units can be directly used according to the platform area
And directly constructing a multi-topology level energy conservation equation set. The electricity consumption can be directly obtained by calculation according to the reading of the metering points of the electric energy meter in the transformer area, the line loss item is a line loss item matrix constructed in an energy conservation equation, the fixed loss item mainly comes from the consumption of the running of the electric energy meter, and the running error item is the statistical line loss of each unit.
According to the operation error estimation method, extra data information is included by adding the energy conservation equations of different levels corresponding to the multi-energy conservation units in the misalignment model, and meanwhile, the number of equation sets is increased. Furthermore, the accuracy and stability of model calculation are improved by increasing the data volume.
It can be understood that, based on the energy conservation equation set, the operation error of the electric energy meter in the platform area is determined, and the operation error comprises the following steps:
determining operation error terms corresponding to the energy conservation units as fitting targets;
solving an energy conservation equation set based on the fitting target to obtain an error coefficient of the electric energy meter in the transformer area;
and determining the operation error of the electric energy meter in the transformer area based on the error coefficient of the electric energy meter in the transformer area.
It should be noted that the fitting target is equivalent to a label of the data when being solved, and the error parameter is the result obtained by the solving. And solving an energy conservation equation set based on the fitting target to obtain an error coefficient of the electric energy meter in the distribution room, so that the sharing of the error coefficient can be realized. Since a table may appear in multiple cells, they are in the same column of equations in the system of equations, so that the same error coefficients are actually used in the conservation equations for the different cells, achieving shared coefficients.
Here based on units
Method for constructing energy conservation equation set, pair
And filling corresponding parts in the equations respectively according to the following modes to obtain the final multi-topology-level energy conservation equation set to be solved. Constructing a multi-topology-level energy conservation equation set according to all the energy conservation units left after filtering, wherein the multi-topology-level energy conservation equation set comprises the following steps:
。
in particular, the method comprises the following steps of,
is a unit
The objective of equation solution, i.e. the statistical line loss, corresponds to a unit
The statistical line loss of (d) is as shown in equation 4:
wherein the content of the first and second substances,
is a unit
The matrix of the amount of power used in (c),
，
the table number of all non-summary tables in the distribution area is the distribution area.
For
Is provided withThe following conditions are provided:
it can be understood that, solving the energy conservation equation system based on the fitting target to obtain the error coefficient of the electric energy meter in the distribution room includes:
and solving an energy conservation equation set by adopting a linear regression method based on the fitting target to obtain an error coefficient of the electric energy meter in the transformer area.
It should be noted that in the current method, the energy conservation equation can be solved by a linear regression method, such as ridge regression algorithm or Lasso regression algorithm. After the operation error of the electric energy meter in the transformer area is determined, the electric energy meter with the operation error reaching the standard of the over-tolerance meter can be used as the finally screened over-tolerance meter based on the preset standard of the over-tolerance meter, and the screening of the over-tolerance meter is realized.
It should be noted that, as shown in fig. 2, an embodiment of the present invention further discloses an operation error estimation method, which includes the following steps:
204, constructing a multi-topology-level energy conservation equation set based on each energy conservation unit in the filtered transformer area;
and 205, solving an energy conservation equation set, and determining the operation error of the electric energy meter in the transformer area.
According to the operation error estimation method, the basic computing unit is selected according to the topological corresponding relation, the energy conservation unit with data abnormity is set according to the preset condition, the problematic unit is removed, the computing solution of other units is not influenced, the electric meters in the unaffected computing units can still be normally monitored by the model on the platform area with the data problem, and therefore the monitoring range of the misalignment model and the robustness to the data abnormity are expanded. The energy conservation equation set of multiple topological layers is constructed, and the topological information in the transformer area is fully utilized by a method of combining the multiple topological layers by sharing error coefficients, so that the accuracy and the stability of model calculation are improved.
The following describes the operation error estimation apparatus provided by the present invention, and the operation error estimation apparatus described below and the operation error estimation method described above may be referred to in correspondence with each other. As shown in fig. 3, includes:
the unit dividing module 301 is configured to determine multiple energy conservation units in a topological relation based on the topological relation of the electric energy meters in the transformer substation; the energy conservation relation is satisfied among the plurality of electric energy meters in the energy conservation unit;
the equation building module 302 is configured to build an energy conservation equation set based on energy conservation relations corresponding to the plurality of energy conservation units respectively;
and the output module 303 is configured to determine an operation error of the electric energy meter in the transformer area based on the energy conservation equation set.
According to the operation error estimation device, the unit dividing module effectively utilizes the topological relation of the electric energy meters in the transformer area, and can divide a plurality of energy conservation units in the transformer area by determining the energy conservation relation among the electric energy meters at different levels in the transformer area. Then, the equation configuration modeling block constructs an energy conservation equation based on the energy conservation units, and the error coefficients are shared among different units for the same electric meter to obtain an augmented energy conservation equation. And finally, the output module solves the equation set through a regression method to obtain the operation errors of all the electric energy meters in the distribution room, and the convenience degree of operation error solution is effectively improved.
The device comprises a unit dividing module, a screening module and an equation set constructing module, wherein the screening module is used for screening a plurality of energy conservation units in the transformer area obtained by the unit dividing module based on preset conditions, and transmitting the energy conservation units meeting the preset conditions to the equation set constructing module.
It can be understood that the equation building module further comprises a screening module;
the screening module is used for eliminating the energy conservation units which do not meet the preset conditions from the multiple energy conservation units according to the energy conservation relations corresponding to the multiple energy conservation units respectively to obtain multiple target energy conservation units; the preset conditions comprise that the electric energy meter acquisition success rate is greater than a first numerical value and/or the electric energy meter line loss rate is less than a second numerical value;
the equation building module is also used for building an energy conservation equation set based on the energy conservation relations corresponding to the target energy conservation units respectively.
It is understood that the plurality of electric energy meters comprises one first electric energy meter and at least one second electric energy meter deployed in two adjacent levels in a topological relationship;
the first electric energy meter at a higher level and the at least one second electric energy meter at a lower level satisfy an energy conservation relation.
It is understood that, based on the energy conservation relation corresponding to each of the plurality of energy conservation units, an energy conservation equation set is established, which includes:
according to the energy conservation relations corresponding to the energy conservation units, eliminating the energy conservation units which do not meet preset conditions from the energy conservation units to obtain a plurality of target energy conservation units; the preset conditions comprise that the electric energy meter acquisition success rate is greater than a first numerical value and/or the electric energy meter line loss rate is less than a second numerical value;
and establishing an energy conservation equation set based on the energy conservation relations corresponding to the target energy conservation units respectively.
It can be understood that, based on the energy conservation relation corresponding to each of the plurality of target energy conservation units, an energy conservation equation set is established, which includes:
determining electric quantity data corresponding to the target energy conservation units based on the energy conservation relations corresponding to the target energy conservation units; the electric quantity data comprises electricity consumption, a line loss item, a solid loss item and an operation error item;
establishing energy conservation equations corresponding to the target energy conservation units on the basis of the electric quantity data corresponding to the target energy conservation units;
and establishing an energy conservation equation set based on the energy conservation equations corresponding to the target energy conservation units respectively.
It can be understood that, based on the energy conservation equation set, the operation error of the electric energy meter in the platform area is determined, and the operation error comprises the following steps:
determining operation error terms corresponding to the energy conservation units as fitting targets;
solving an energy conservation equation set based on the fitting target to obtain an error coefficient of the electric energy meter in the transformer area;
and determining the operation error of the electric energy meter in the distribution area based on the error coefficient of the electric energy meter in the distribution area.
It can be understood that solving the energy conservation equation system based on the fitting target obtains the error coefficient of the electric energy meter in the platform area, including:
and solving an energy conservation equation set by adopting a linear regression method based on the fitting target to obtain an error coefficient of the electric energy meter in the transformer area.
Fig. 4 illustrates a physical structure diagram of an electronic device, which may include, as shown in fig. 4: a processor (processor) 410, a communication Interface 420, a memory (memory) 430 and a communication bus 440, wherein the processor 410, the communication Interface 420 and the memory 430 are communicated with each other via the communication bus 440. Processor 410 may invoke logic instructions in memory 430 to perform a method of operating error estimation, the method comprising:
determining a plurality of energy conservation units in the topological relation based on the topological relation of the electric energy meters in the transformer area; the energy conservation relation is satisfied among the plurality of electric energy meters in each energy conservation unit;
establishing an energy conservation equation set based on the energy conservation relations corresponding to the energy conservation units respectively;
and determining the operation error of the electric energy meter in the platform area based on the energy conservation equation set.
In addition, the logic instructions in the memory 430 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention or a part thereof which substantially contributes to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, the computer program product including a computer program, the computer program being stored on a non-transitory computer-readable storage medium, and when the computer program is executed by a processor, the computer being capable of executing the operation error estimation method provided by the above methods, the method including:
determining a plurality of energy conservation units in the topological relation based on the topological relation of the electric energy meters in the transformer area; the energy conservation relation is satisfied among the plurality of electric energy meters in each energy conservation unit;
establishing an energy conservation equation set based on the energy conservation relations corresponding to the energy conservation units respectively;
and determining the operation error of the electric energy meter in the platform area based on the energy conservation equation set.
In yet another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored, the computer program being implemented by a processor to perform the method for estimating the operation error provided by the above methods, the method comprising:
determining a plurality of energy conservation units in the topological relation based on the topological relation of the electric energy meters in the transformer area; the energy conservation relation is satisfied among the plurality of electric energy meters in each energy conservation unit;
establishing an energy conservation equation set based on the energy conservation relations corresponding to the energy conservation units respectively;
and determining the operation error of the electric energy meter in the platform area based on the energy conservation equation set.
The above-described embodiments of the apparatus are merely illustrative, and units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment may be implemented by software plus a necessary general hardware platform, and may also be implemented by hardware. Based on the understanding, the above technical solutions substantially or otherwise contributing to the prior art may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method of various embodiments or some parts of embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. An operational error estimation method, comprising:
determining a plurality of energy conservation units in a topological relation based on the topological relation of the electric energy meters in the transformer area; the energy conservation units are arranged in the power supply unit, wherein a plurality of electric energy meters in each energy conservation unit satisfy an energy conservation relation;
establishing an energy conservation equation set based on the energy conservation relations corresponding to the energy conservation units respectively;
and determining the operation error of the electric energy meter in the transformer area based on the energy conservation equation set.
2. The method according to claim 1, wherein the plurality of electric energy meters includes one first electric energy meter and at least one second electric energy meter disposed at two adjacent levels in the topological relationship, the first electric energy meter having a higher level than the second electric energy meter;
wherein the first electric energy meter at a higher hierarchy level and the at least one second electric energy meter at a lower hierarchy level satisfy an energy conservation relationship.
3. The operating error estimation method according to claim 1 or 2, wherein the establishing an energy conservation equation system based on the energy conservation relation corresponding to each of the plurality of energy conservation units comprises:
according to the energy conservation relations corresponding to the energy conservation units, eliminating the energy conservation units which do not meet preset conditions from the energy conservation units to obtain a plurality of target energy conservation units; the preset conditions comprise that the acquisition success rate of the electric energy meter is greater than a first numerical value and/or the line loss rate of the electric energy meter is less than a second numerical value;
and establishing the energy conservation equation set based on the energy conservation relations corresponding to the target energy conservation units respectively.
4. The operating error estimation method according to claim 3, wherein the establishing the energy conservation equation system based on the energy conservation relation corresponding to each of the target energy conservation units comprises:
determining electric quantity data corresponding to the target energy conservation units on the basis of energy conservation relations corresponding to the target energy conservation units; the electric quantity data comprise electric quantity, line loss items, solid loss items and operation error items;
establishing energy conservation equations corresponding to the target energy conservation units respectively based on the electric quantity data corresponding to the target energy conservation units respectively;
and establishing the energy conservation equation set based on the energy conservation equations respectively corresponding to the target energy conservation units.
5. The method according to claim 1 or 2, wherein the determining the operation error of the electric energy meter in the area based on the energy conservation equation comprises:
determining operation error terms corresponding to the energy conservation units as fitting targets;
solving the energy conservation equation set based on the fitting target to obtain an error coefficient of the electric energy meter in the distribution room;
and determining the operation error of the electric energy meter in the distribution area based on the error coefficient of the electric energy meter in the distribution area.
6. The method according to claim 5, wherein the solving the energy conservation equations based on the fit objective to obtain error coefficients of the electric energy meter in the distribution room comprises:
and solving the energy conservation equation set by adopting a linear regression method based on the fitting target to obtain an error coefficient of the electric energy meter in the distribution room.
7. An operation error estimation device, comprising:
the unit dividing module is used for determining a plurality of energy conservation units in the topological relation based on the topological relation of the electric energy meters in the transformer area; the energy conservation relation is satisfied among the plurality of electric energy meters in each energy conservation unit;
the equation building module is used for building an energy conservation equation set based on the energy conservation relations corresponding to the energy conservation units respectively;
and the output module is used for determining the operation error of the electric energy meter in the transformer area based on the energy conservation equation set.
8. The operation error estimation device according to claim 7, wherein the equation construction module further includes a filtering module;
the screening module is used for removing the energy conservation units which do not meet the preset conditions from the plurality of energy conservation units according to the energy conservation relations corresponding to the plurality of energy conservation units respectively to obtain a plurality of target energy conservation units; the preset conditions comprise that the acquisition success rate of the electric energy meter is greater than a first numerical value and/or the line loss rate of the electric energy meter is less than a second numerical value;
the equation building module is further used for building the energy conservation equation set based on the energy conservation relations corresponding to the target energy conservation units respectively.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of operating error estimation as claimed in any one of claims 1 to 6 when executing the program.
10. A non-transitory computer-readable storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the operational error estimation method according to any one of claims 1 to 6.
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