A method and system for detecting comprehensive errors in metering devices at the settlement checkpoint of power generation enterprises

Abstract

This invention discloses a method and system for comprehensive error detection of metering devices at the settlement gateway of power generation enterprises. The invention includes determining the value ranges of the power loss factor and the line loss factor over the previous n periods T; determining constraints on the actual power consumption of the upstream gateway metering point based on the actual self-consumption, actual power generation, and the value ranges of the power loss factor; and determining a first closed region based on the constraints on the actual power consumption of the upstream gateway metering point and both. If the first closed region is partially or entirely outside a preset second closed region, it is determined that the metering device at the settlement gateway of the power generation enterprise has an out-of-tolerance risk. This invention has the advantages of high detection accuracy and rapid, efficient detection, and can be used to prioritize on-site inspections of metering points at high-risk levels, reducing the frequency of on-site inspections of low-risk metering points.

Description

Technical Field

[0001] This invention relates to error detection technology for electricity metering devices, specifically to a comprehensive error detection method and system for metering devices at the settlement point of power generation enterprises. Background Technology

[0002] Electricity meters are crucial electrical devices for electricity trading and settlement. Power generation companies and grid companies conduct electricity transactions and settlements through intermediary electricity meters, typically involving large sums of money. According to DLT / 448-2016, "Technical Management Regulations for Electricity Metering Devices," Class I metering devices must be inspected on-site every 6 months, Class II metering devices every 12 months, and Class III metering devices every 24 months. In recent years, domestic electricity demand has continued to grow, and the government has also strongly supported the development of new energy sources such as photovoltaic and wind power. Therefore, the number of Class I, II, and III metering devices has maintained a rapid growth trend.

[0003] Metering devices at the settlement gateway of power generation enterprises are typically located within the power generation enterprise or adjacent substations. On-site inspection requires professionals to carry equipment back and forth between the power generation enterprises and substations, which is inefficient and consumes significant manpower and resources. In recent years, with the continuous development of information and communication technologies, it has become possible to remotely collect electricity meter information and store it at the system master station. This makes it possible to monitor the error status of the metering devices at the settlement gateway of power generation enterprises using information from various metering points within the power generation enterprise and metering points in the opposite substation. However, how to achieve accurate comprehensive error detection of metering devices at the settlement gateway of power generation enterprises remains a key technical problem that urgently needs to be solved. Summary of the Invention

[0004] The technical problem to be solved by this invention is to provide a method and system for detecting the comprehensive error of metering devices at the settlement point of a power generation enterprise, in view of the above-mentioned problems of the prior art. This invention aims to comprehensively evaluate the comprehensive error of each metering point by monitoring the changes in the comprehensive error of the metering devices at the settlement point and the metering point on the opposite side of the line through historical data of the electricity meter. It has the advantages of high detection accuracy, fast and efficient detection, and can be used to prioritize on-site inspection work for metering points with high risk level, and reduce the frequency of on-site inspection for low risk level metering points.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A method for detecting the comprehensive error of metering devices at the settlement checkpoint of power generation enterprises, comprising: S101, determine the power loss factor for the previous n cycles T respectively. The range of values and line loss factor The range of values ,in, Power loss factor The minimum value, Power loss factor The maximum value, Line loss factor The minimum value, Line loss factor The maximum value; S102, based on the actual self-consumption of electricity in this period T. Actual power generation Combined with power loss factor The range of values Determine the actual electricity consumption at the upstream gateway metering point The constraints, and based on the actual electricity consumption at the upstream gateway metering point. The constraints are in , Draw a graph perpendicular to the coordinate system formed by the two. Two parallel lines L1 and L2 of the axis, where The actual electricity consumption at the substation metering point opposite the power generation company's metering point, and based on... , Both and the line loss factor The range of values The constraints are in , In the coordinate system formed by the two, draw two straight lines L3 and L4 passing through the origin, and obtain the first closed region formed by the intersection of straight lines L1, L2, L3 and L4; S103, determine whether the first closed area is partially or entirely outside the second closed area. If it is, determine that the metering device at the power generation enterprise's gateway has an out-of-tolerance risk, where the second closed area is the actual electricity generated at the upstream gateway metering point. The limit error range, the actual electricity consumption of the substation metering point opposite the power generation enterprise metering point in this period T The limit error range is within , The region formed by the intersection of the two coordinate systems.

[0006] Optionally, in step S101, the power loss factor for the previous n cycles T is determined. The range of values and line loss factor The range of values At any given period T, the power loss factor The expression for the computation function is: , In the above formula, This represents the actual amount of electricity consumed. This represents the actual amount of electricity generated. This represents the actual electricity consumption at the upstream gateway metering point.

[0007] Optionally, in step S101, the power loss factor for the previous n cycles T is determined. The range of values and line loss factor The range of values At that time, the line loss factor within any period T The expression for the computation function is: , In the above formula, The actual electricity consumption at the upstream gateway metering point. This represents the actual electricity consumption at the substation metering point opposite the power generation enterprise's metering point for this period T.

[0008] Optionally, in step S102, the actual electricity consumption at the upstream gateway metering point is determined. The functional expression for the constraint condition is: , In the above formula, Power loss factor The minimum value, Power loss factor The maximum value, This represents the actual amount of electricity consumed. This represents the actual amount of electricity generated. This represents the actual electricity consumption at the upstream gateway metering point.

[0009] Optionally, in step S102 , Both and the line loss factor The range of values The functional expression for the constraint condition is: , In the above formula, Line loss factor The minimum value, Line loss factor The maximum value, The actual electricity consumption at the upstream gateway metering point. This refers to the actual electricity generated at the substation metering point opposite the metering point of the power generation company.

[0010] Optionally, in step S103, the actual electricity consumption at the upstream gateway metering point... The limit of error is the actual electricity consumption at the upstream gateway metering point. The intersection of the limit error ranges of the two electricity meters at the metering point, where the limit error range of the first electricity meter is: , The limit of error for the second electricity meter is: , in, This represents the actual electricity consumption of the first electricity meter. This represents the actual electricity consumption of the second electricity meter.

[0011] Optionally, in step S103, the actual electricity generated at the substation metering point opposite the power generation enterprise's metering point... The limit of error is the actual electricity generated at the substation metering point opposite the metering point of the power generation enterprise. The intersection of the limit error ranges of the two electricity meters at the metering point, where the limit error range of the first electricity meter is: , The limit of error for the second electricity meter is: , in, This represents the actual electricity consumption at the metering point of the substation opposite the first electricity meter. This represents the actual electricity consumption at the substation metering point opposite the second electricity meter.

[0012] Optionally, after determining in step S103 that there is a risk of out-of-tolerance in the metering device at the gateway of the power generation enterprise, the method further includes determining that the first closed area exceeds the boundary line of the second closed area, and outputting the energy meter corresponding to the boundary line as the out-of-tolerance determination result. The second closed area is rectangular, and each boundary line corresponds to the actual electricity consumption of the gateway metering point. Or the actual electricity consumption at the substation metering point opposite the power generation company's metering point. The electricity meter.

[0013] In addition, the present invention also provides a comprehensive error detection system for metering devices at the settlement point of a power generation enterprise, including a microprocessor and a memory connected to each other, wherein the microprocessor is programmed or configured to execute the comprehensive error detection method for metering devices at the settlement point of a power generation enterprise.

[0014] Furthermore, the present invention also provides a computer-readable storage medium storing a computer program, the computer program being programmed or configured by a microprocessor to execute the comprehensive error detection method for the metering device at the settlement point of the power generation enterprise.

[0015] Compared with the prior art, the present invention has the following main advantages: The present invention includes determining the power loss factor for the previous n periods T. The range of values and line loss factor The range of values Based on the actual self-consumption of electricity in this period T Actual power generation Combined with power loss factor The range of values Determine the actual electricity consumption at the upstream gateway metering point The constraints, and based on the actual electricity consumption at the upstream gateway metering point. The constraints are in , Draw a graph perpendicular to the coordinate system formed by the two. Two parallel lines L1 and L2 of the axis, where The actual electricity consumption at the substation metering point opposite the power generation company's metering point, and based on... , Both and the line loss factor The range of values The constraints are in , Two straight lines, L3 and L4, passing through the origin are drawn in the coordinate system formed by the two. The first closed region formed by the intersection of lines L1, L2, L3, and L4 is obtained. It is determined whether the first closed region is partially or entirely outside the second closed region. If it is, it is determined that the metering device at the power generation enterprise has an out-of-tolerance risk. This invention uses historical data from the electricity meter to monitor the changes in the comprehensive error of the metering devices at the settlement point and the metering point on the opposite side of the line, and comprehensively evaluates the comprehensive error of each metering point. It has the advantages of high detection accuracy and fast and efficient detection. It can be used to prioritize on-site inspection work for metering points with high risk levels and reduce the frequency of on-site inspection for low-risk metering points. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the basic process of the method in an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the power grid topology of a power generation company in an embodiment of the present invention.

[0018] Figure 3 This is an example of the first enclosed region in an embodiment of the present invention.

[0019] Figure 4 This is an example of the second enclosed region in an embodiment of the present invention.

[0020] Figure 5 This is an example of a combination of the first closed region and the second closed region in an embodiment of the present invention. Detailed Implementation

[0021] like Figure 1 As shown in this embodiment, the comprehensive error detection method for metering devices at the settlement checkpoint of power generation enterprises includes: S101, determine the power loss factor for the previous n cycles T respectively. The range of values and line loss factor The range of values ,in, Power loss factor The minimum value, Power loss factor The maximum value, Line loss factor The minimum value, Line loss factor The maximum value; S102, based on the actual self-consumption of electricity in this period T. Actual power generation Combined with power loss factor The range of values Determine the actual electricity consumption at the upstream gateway metering point The constraints, and based on the actual electricity consumption at the upstream gateway metering point. The constraints are in , Draw a graph perpendicular to the coordinate system formed by the two. Two parallel lines L1 and L2 of the axis, where The actual electricity consumption at the substation metering point opposite the power generation company's metering point, and based on... , Both and the line loss factor The range of values The constraints are in , In the coordinate system formed by the two, draw two straight lines L3 and L4 passing through the origin, and obtain the first closed region formed by the intersection of straight lines L1, L2, L3 and L4; S103, determine whether the first closed area is partially or entirely outside the second closed area. If it is, determine that the metering device at the power generation enterprise's gateway has an out-of-tolerance risk, where the second closed area is the actual electricity generated at the upstream gateway metering point. The limit error range, the actual electricity consumption of the substation metering point opposite the power generation enterprise metering point in this period T The limit error range is within , The region formed by the intersection of the two coordinate systems.

[0022] Figure 2This is a schematic diagram of the power grid topology of the power generation company in this embodiment. The power generation company is connected to the substation via a step-up substation and transmission lines. The metering device at the power generation company's settlement gateway is installed between the power generation company and the substation. When the power generation company consumes electricity, in addition to internal power consumption (mains power), it also consumes internal losses and line losses. The comprehensive error detection method for the metering device at the power generation company's settlement gateway in this embodiment requires obtaining the actual self-consumed electricity separately. Actual power generation Actual electricity consumption at the gateway metering point and the actual electricity consumption at the substation metering point opposite the power generation company's metering point. Because different power generation companies have varying unit capacities, voltage levels of metering devices at key metering points, transformer ratios, and effective digits of energy meters, a longer time interval generally results in more accurate electricity calculations. Therefore, the statistical time interval for electricity consumption is typically monthly, denoted as T. In this embodiment, actual self-consumption electricity... This only represents the electricity used by power generation companies from the generated electricity produced by their generating units, excluding electricity used by power generation companies from other grid power lines. Additionally, for Power generation companies typically consume less electricity internally, resulting in a lower overall multiplier. This is because the error arising from the product of the metering device error and the overall multiplier is also smaller. and Compared to [the previous one], it is almost negligible, therefore [the following is a direct translation of the original text]. This is considered as actual self-consumption of electricity. Similarly, This typically refers to the total power generation of multiple generating units. In reality, it usually involves multiple units, especially with the rapid development of wind and solar power in recent years. The number of units is even greater, and the error resulting from the product of the metering error of a single unit and the overall multiplier will be smaller. and Compared to [the previous one], it is almost negligible, therefore [the following is a direct translation of the original text]. This is considered as actual power generation.

[0023] In this embodiment, the internal power loss of the power generation enterprise is recorded as... , , This includes other losses within the enterprise, such as line losses and transformer losses. As the power loss factor, step S101 determines the power loss factor for the previous n periods T. The range of values and line loss factor The range of values At any given period T, the power loss factor The expression for the computation function is: , In the above formula, This represents the actual amount of electricity consumed. This represents the actual amount of electricity generated. This represents the actual electricity consumption at the upstream gateway metering point.

[0024] In this embodiment, the line loss between the metering point of the power generation enterprise and the metering point of the opposite substation is denoted as... , The line loss factor; in step S101, the power loss factor within the previous n cycles T is determined. The range of values and line loss factor The range of values At that time, the line loss factor within any period T The expression for the computation function is: , In the above formula, The actual electricity consumption at the upstream gateway metering point. This represents the actual electricity consumption at the substation metering point opposite the power generation enterprise's metering point for this period T.

[0025] Starting from the current time point, trace back n periods T and calculate respectively. and The value of , and get and The range of values ​​for is denoted as . and Power loss factor of power generation enterprises Line loss factor between the metering point at the power generation company and the metering point at the opposite substation. The power loss factor is related to the condition of the power generation company's equipment and lines, and the condition of equipment and lines generally changes slowly over time. and line loss factor Within several adjacent time intervals T, it will remain within a very small range of variation, as shown below. and Inequalities: , .

[0026] To ensure low-loss long-distance power transmission, high-voltage power lines are typically used; therefore, metering points are crucial. and High-voltage current transformers with large transformation ratios are typically used, with the combined ratio often reaching hundreds of thousands or even millions. and The metering device at the checkpoint is malfunctioning. Multiplying this error by the overall multiplier results in a significant discrepancy in the electricity consumption. Therefore, the State Grid Corporation has set a high accuracy rating for the checkpoint metering device. Strict requirements were imposed, and it was required that... and Configure two tables, and also... and The measuring devices shall undergo regular on-site inspections. (Record) The electricity consumption of the two electricity meters at the metering point is as follows: and , The electricity consumption of the two electricity meters at the metering point is as follows: and .

[0027] For measuring devices at different levels of checkpoints, the accuracy class... The requirements are as follows: , , , , Combining the above inequalities, for and The solution process is as follows: , , Based on the above formula, the actual electricity consumption at the upstream gateway metering point can be used as a reference. The constraints are in , Draw a graph perpendicular to the coordinate system formed by the two. Two parallel lines L1 and L2 of the axis, where The actual electricity consumption at the substation metering point opposite the power generation company's metering point, and based on... , Both and the line loss factor The range of values The constraints are in , In the coordinate system formed by the two, draw two straight lines L3 and L4 passing through the origin, and obtain the first closed region formed by the intersection of lines L1, L2, L3 and L4, as shown below. Figure 3 As shown.

[0028] In this embodiment, step S102 determines the actual electricity consumption at the upstream gateway metering point. The functional expression for the constraint condition is: , In the above formula, Power loss factor The minimum value, Power loss factor The maximum value, This represents the actual amount of electricity consumed. This represents the actual amount of electricity generated. This represents the actual electricity consumption at the upstream gateway metering point.

[0029] In this embodiment, in step S102 , Both and the line loss factor The range of values The functional expression for the constraint condition is: , In the above formula, Line loss factor The minimum value, Line loss factor The maximum value, The actual electricity consumption at the upstream gateway metering point. This refers to the actual electricity generated at the substation metering point opposite the metering point of the power generation company.

[0030] In this embodiment, the actual power consumption at the upstream gateway metering point in step S103... The limit of error is the actual electricity consumption at the upstream gateway metering point. The intersection of the limit error ranges of the two electricity meters at the metering point, where the limit error range of the first electricity meter is: , The limit of error for the second electricity meter is: , in, This represents the actual electricity consumption of the first electricity meter. This represents the actual electricity consumption of the second electricity meter.

[0031] In this embodiment, the actual electricity consumption at the substation metering point opposite the power generation enterprise's metering point in step S103... The limit of error is the actual electricity generated at the substation metering point opposite the metering point of the power generation enterprise. The intersection of the limit error ranges of the two electricity meters at the metering point, where the limit error range of the first electricity meter is: , The limit of error for the second electricity meter is: , in, This represents the actual electricity consumption at the metering point of the substation opposite the first electricity meter. This represents the actual electricity consumption at the substation metering point opposite the second electricity meter.

[0032] In this embodiment, the second enclosed area represents the actual electricity consumption at the upstream gateway metering point. The limit error range, the actual electricity consumption of the substation metering point opposite the power generation enterprise metering point in this period T The limit error range is within , The region formed by the intersection of the two coordinate systems. Its determination method is as follows: right Deformation occurs because and All belong to the interval Therefore, we can conclude that: , Similarly, for , as well as The transformation yields: , , , Assumption , And the second enclosed area is like Figure 4 The shaded area is shown in the image. Figure 5 The box shown represents the second closed region, and the shaded area represents the first closed region. Because... Figure 5 In the example, the first closed area is entirely outside the second closed area, indicating that the metering device at the power generation enterprise is at risk of exceeding tolerance.

[0033] if Figure 5If the shaded area (first closed area) extends beyond part or all of the box (second closed area), it is determined that the metering point of this power generation enterprise has an out-of-tolerance risk. This can be compared and analyzed using historical data and graphs to identify which boundary line has changed significantly, causing the shaded area (first closed area) to extend beyond the box (second closed area). The specific metering device involved in this boundary line is located, and the data is verified. If the data is correct, an on-site inspection is conducted to see if the metering device is out of tolerance. If it is, the metering device is replaced; if it is not, other metering devices are inspected on-site to find the root cause of the problem. Therefore, as an optional implementation, after determining that the metering device of this power generation enterprise has an out-of-tolerance risk in step S103 of this embodiment, it also includes determining the boundary line of the first closed area extending beyond the second closed area, and outputting the energy meter corresponding to this boundary line as the out-of-tolerance determination result. The second closed area is rectangular, and each boundary line corresponds to the actual electricity consumption of the upstream gate metering point. Or the actual electricity consumption at the substation metering point opposite the power generation company's metering point. The electricity meter.

[0034] In summary, the comprehensive error detection method for metering devices at the settlement gateway of power generation enterprises in this embodiment can monitor the changes in the comprehensive error of metering devices at the settlement gateway metering point and the metering point on the opposite side of the line through historical data of the electricity meter. It comprehensively evaluates the comprehensive error of each metering point, prioritizing on-site inspections of metering points at high-risk levels while reducing the frequency of on-site inspections for low-risk metering points. This method utilizes historical data from the electricity meter to construct an error monitoring system for the metering points at the power generation enterprise's settlement gateway. It identifies and locates metering points with errors through graphical changes, and is easy to operate. This method effectively reduces the number of on-site inspections of the metering devices at the settlement gateway, saving significant material and human resources costs.

[0035] Furthermore, this embodiment also provides a comprehensive error detection system for metering devices at the settlement point of a power generation enterprise, including a microprocessor and a memory interconnected thereto. The microprocessor is programmed or configured to execute the comprehensive error detection method for metering devices at the settlement point of a power generation enterprise. Additionally, this embodiment also provides a computer-readable storage medium storing a computer program for being programmed or configured by the microprocessor to execute the comprehensive error detection method for metering devices at the settlement point of a power generation enterprise.

[0036] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-readable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create an implementation for the process. Figure 1 One or more processes and / or boxes Figure 1 The computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process. Figure 1 One or more processes and / or boxes Figure 1 The functions specified in one or more boxes. These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable apparatus for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0037] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for detecting the comprehensive error of metering devices at the settlement checkpoint of power generation enterprises, characterized in that, include: S101, determine the power loss factor for the previous n cycles T respectively. The range of values and line loss factor The range of values ,in, Power loss factor The minimum value, Power loss factor The maximum value, Line loss factor The minimum value, Line loss factor The maximum value; S102, based on the actual self-consumption of electricity in this period T. Actual power generation Combined with power loss factor The range of values Determine the actual electricity consumption at the upstream gateway metering point The constraints, and based on the actual electricity consumption at the upstream gateway metering point. The constraints are in , Draw a graph perpendicular to the coordinate system formed by the two. Two parallel lines L1 and L2 lie on the axis, among which... The actual electricity consumption at the substation metering point opposite the power generation company's metering point, and based on... , Both and the line loss factor The range of values The constraints are in , In the coordinate system formed by the two, draw two straight lines L3 and L4 passing through the origin, and obtain the first closed region formed by the intersection of straight lines L1, L2, L3 and L4; S103, determine whether the first closed area is partially or entirely outside the second closed area. If it is, determine that the metering device at the power generation enterprise's gateway has an out-of-tolerance risk, where the second closed area is the actual electricity generated at the upstream gateway metering point. The limit error range, the actual electricity consumption of the substation metering point opposite the power generation enterprise metering point in this period T The limit error range is within , The region formed by the intersection of the two coordinate systems; In step S101, the power loss factor within the previous n cycles T is determined. The range of values and line loss factor The range of values At any given period T, the power loss factor The expression for the computation function is: ， In the above formula, This represents the actual amount of electricity consumed. This represents the actual amount of electricity generated. This refers to the actual electricity consumption at the upstream gateway metering point. In step S101, the power loss factor within the previous n cycles T is determined. The range of values and line loss factor The range of values At that time, the line loss factor within any period T The expression for the computation function is: ， In the above formula, The actual electricity consumption at the upstream gateway metering point. This represents the actual electricity consumption at the substation metering point opposite the power generation enterprise's metering point for this period T. In step S102, the actual electricity consumption at the upstream gateway metering point is determined. The functional expression for the constraint condition is: ， In the above formula, Power loss factor The minimum value, Power loss factor The maximum value, This represents the actual amount of electricity consumed. This represents the actual amount of electricity generated. This represents the actual electricity consumption at the upstream gateway metering point.

2. The method for detecting the comprehensive error of the metering device at the settlement point of a power generation enterprise according to claim 1, characterized in that, In step S102 , Both and the line loss factor The range of values The functional expression for the constraint condition is: ， In the above formula, Line loss factor The minimum value, Line loss factor The maximum value, The actual electricity consumption at the upstream gateway metering point. This represents the actual electricity consumption at the substation metering point opposite the power generation enterprise's metering point for this period T.

3. The method for detecting the comprehensive error of the metering device at the settlement point of a power generation enterprise according to claim 1, characterized in that, In step S103, the actual electricity consumption at the upstream gateway metering point The limit of error is the actual electricity consumption at the upstream gateway metering point. The intersection of the limit error ranges of the two electricity meters at the metering point, where the limit error range of the first electricity meter is: ， The limit of error for the second electricity meter is: ， in, This represents the actual electricity consumption of the first electricity meter. This represents the actual electricity consumption of the second electricity meter. The accuracy class of the metering device at the checkpoint.

4. The method for detecting the comprehensive error of the metering device at the settlement point of a power generation enterprise according to claim 1, characterized in that, In step S103, the actual electricity consumption at the substation metering point opposite the power generation enterprise's metering point... The limit of error is the actual electricity generated at the substation metering point opposite the metering point of the power generation enterprise. The intersection of the limit error ranges of the two electricity meters at the metering point, where the limit error range of the first electricity meter is: ， The limit of error for the second electricity meter is: ， in, This represents the actual electricity consumption at the metering point of the substation opposite the first electricity meter. This represents the actual electricity consumption at the metering point of the substation opposite the second electricity meter. The accuracy class of the metering device at the checkpoint.

5. The method for detecting the comprehensive error of the metering device at the settlement point of a power generation enterprise according to claim 1, characterized in that, After determining in step S103 that there is an out-of-tolerance risk in the metering device at the gateway of this power generation enterprise, the method further includes determining the boundary line of the first closed area beyond the boundary line of the second closed area, and outputting the energy meter corresponding to the boundary line as the out-of-tolerance determination result. The second closed area is rectangular and each boundary line corresponds to the actual electricity consumption of the gateway metering point. Or the actual electricity consumption at the substation metering point opposite the power generation company's metering point. The electricity meter.

6. A comprehensive error detection system for metering devices at the settlement checkpoint of a power generation enterprise, comprising a microprocessor and a memory interconnected, characterized in that, The microprocessor is programmed or configured to execute the comprehensive error detection method for the metering device at the settlement point of a power generation enterprise as described in any one of claims 1 to 5.

7. A computer-readable storage medium storing a computer program, characterized in that, The computer program is used to be programmed or configured by a microprocessor to execute the comprehensive error detection method for metering devices at the settlement checkpoint of a power generation enterprise as described in any one of claims 1 to 5.

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