Automatic parameter compensation device for electric energy meter

Abstract

The application discloses an automatic parameter compensation device for an electric energy meter. The automatic parameter compensation device comprises a parameter acquisition module, a function fitting module, a compensation judgment module, a first compensation module and a second compensation module. The parameter acquisition module is used for applying a plurality of corresponding standard currents and / or standard voltages to a primary side of a current transformer and / or a voltage transformer of the electric energy meter, and acquiring corresponding measured currents and / or measured voltages on a secondary side to obtain a plurality of data groups. The function fitting module is used for fitting the data groups to obtain a first fitting function relationship between the electric parameters on the secondary side and the electric parameters on the primary side. The compensation judgment module is used for comparing the first fitting function relationship with a standard function relationship to judge whether the load resistance and / or the magnetic permeability of the transformer needs to be compensated. The first compensation module is used for performing resistance deviation parameter compensation on the load resistance. The second compensation module is used for performing magnetic permeability deviation parameter compensation on the magnetic permeability. The application can automatically compensate the parameters of the electric energy meter and improve the measurement accuracy.

Description

Technical Field

[0001] This invention relates to the field of electricity meter compensation, and in particular to an automatic parameter compensation device for electricity meters. Background Technology

[0002] An electricity meter is an instrument used to measure electrical energy. Also known as a kilowatt-hour meter, it measures various electrical quantities. Electricity meters play a crucial role in power systems, serving not only for metering energy consumption and billing, but also for power management, energy auditing, distributed energy system monitoring, smart grid construction, and environmental protection and sustainable development.

[0003] During the manufacturing process of electricity meters, slight deviations in the manufacturing process may lead to insufficient accuracy. Specifically, variations in load resistance and permeability of the transformers (current transformers and voltage transformers) can cause inconsistencies in small and large current responses, thus affecting the accuracy of electricity meter measurements at the time of manufacture. Summary of the Invention

[0004] In view of the aforementioned deficiencies of the prior art, the technical problem to be solved by the present invention is to provide an automatic parameter compensation device for electricity meters, which aims to automatically compensate the parameters of electricity meters and improve their measurement accuracy.

[0005] To achieve the above objectives, the present invention provides an automatic parameter compensation device for an electricity meter, the automatic parameter compensation device for an electricity meter comprising: a parameter acquisition module, a function fitting module, a compensation judgment module, a first compensation module, and a second compensation module;

[0006] The parameter acquisition module is used to apply multiple corresponding standard currents and / or standard voltages to the primary side of the current transformer and / or voltage transformer of the energy meter, and to acquire the corresponding measurement current and / or measurement voltage on the secondary side to obtain multiple data sets; wherein, the data set includes a pair of corresponding standard currents and measurement currents, or a pair of corresponding standard voltages and measurement voltages;

[0007] The function fitting module is used to fit the data set to obtain a first fitting function relationship in which the secondary side electrical parameters follow the changes of the primary side electrical parameters; wherein, the electrical parameters include current and voltage, and the first fitting function relationship includes a head nonlinear region, a middle linear region, and a tail nonlinear region;

[0008] The compensation judgment module is used to compare the first fitted function relationship with the standard function relationship. If the first fitted function and the standard function relationship match perfectly, it is determined that the energy meter does not require parameter compensation. If the middle linear region does not match the standard function relationship, it is determined that the load resistance of the current transformer has deviated, and the first compensation module is activated. If the head nonlinear region and the tail nonlinear region do not match the standard function relationship, it is determined that the permeability of the current transformer has deviated, and the second compensation module is activated.

[0009] The first compensation module is used to compensate the load resistor for resistance deviation parameters based on the relationship between the central linear region and the standard function.

[0010] The second compensation module is used to compensate for the permeability deviation parameter based on the head nonlinear region and / or tail nonlinear region.

[0011] Optionally, the compensation determination module is specifically used for:

[0012] The first fitted function relationship is compared with the standard function relationship; wherein the standard function relationship includes a head standard nonlinear region, a middle standard linear region, and a tail standard nonlinear region;

[0013] If the first fitted function and the standard function are perfectly matched, it is determined that the energy meter does not require parameter compensation.

[0014] In response to the difference between the central linear region and the central standard linear region, the relationship between the central linear region and the standard function is mismatched, it is determined that the load resistance of the current transformer has deviated, and the first compensation module is activated.

[0015] If the range of the first region corresponding to the head nonlinear region and the tail nonlinear region is different from the range of the standard region corresponding to the head standard nonlinear region and the tail standard nonlinear region, then the head nonlinear region and the tail nonlinear region do not match the standard function relationship, and it is determined that the permeability of the mutual inductor has deviated, so that the second compensation module is activated.

[0016] Optionally, the first compensation module is specifically used for:

[0017] The standard load resistance is obtained based on the standard functional relationship; the actual load resistance is obtained based on the central linear region.

[0018] Based on the standard load resistance and the actual load resistance, the load resistance is compensated for resistance deviation parameters.

[0019] Optionally, the second compensation module includes a magnetoresistive acquisition submodule and a permeability compensation submodule;

[0020] The magnetoresistive acquisition submodule is used to obtain the magnetoresistive force of the mutual inductor based on the specific values ​​of the data group corresponding to the head nonlinear region and / or the tail nonlinear region.

[0021] The permeability compensation submodule is used to obtain the actual permeability of the current transformer based on the magnetic reluctance; and to compensate for the permeability deviation parameter based on the actual permeability.

[0022] Optionally, the magnetoresistive acquisition submodule is specifically used for:

[0023] When the transformer is a current transformer, according to

[0024]

[0025] The magnetoresistive reluctance is obtained; wherein, The standard current, For the corresponding measured current, The number of turns on the first side, The number of secondary side turns, For the magnetoresistive, The current transformer is a resistive load. The angular frequency of the power supply. The imaginary unit of the angular frequency of the power supply;

[0026] When the transformer is the voltage transformer, according to

[0027]

[0028] The magnetoresistive reluctance is obtained; wherein, The standard voltage is... For the corresponding measured voltage, The number of turns on the first side, The number of secondary side turns, For the magnetoresistive, The voltage transformer is a resistive load. The angular frequency of the power supply. The imaginary unit of the angular frequency of the power supply is... The magnetizing inductance is described above.

[0029] Optionally, the permeability compensation submodule is specifically used for:

[0030] according to

[0031]

[0032] The actual permeability of the mutual inductor is obtained; wherein, For the magnetoresistive, The magnetic circuit length of the current transformer is given. Let be the cross-sectional area of ​​the magnetic core of the current transformer. The actual permeability is...

[0033] Based on the actual permeability, permeability deviation parameter compensation is performed on the permeability.

[0034] Optionally, the parameter acquisition module is specifically used for:

[0035] Apply the standard current or standard voltage corresponding to the middle range to the current transformer or voltage transformer, and collect the corresponding measurement current or measurement voltage; take two points on both sides of the middle range, apply the corresponding standard current or standard voltage, and collect the corresponding measurement current or measurement voltage, so that these three data form a first linear relationship;

[0036] Next, two more points are selected outwards, and the corresponding standard current or standard voltage is applied. The corresponding measurement current or measurement voltage is collected, and it is determined whether the corresponding data group is in the first linear relationship. If not, the area between the point and the nearest point is determined as a high-frequency sampling area for sampling at the first frequency, and the area corresponding to the first linear relationship is determined as a low-frequency sampling area for sampling at the second frequency. If yes, the operation is repeated until the newly added data group is not in the first linear relationship. Wherein, the first frequency is greater than the second frequency.

[0037] Optionally, the automatic parameter compensation device for the electricity meter further includes: a verification module;

[0038] The testing module is used to apply a testing current and / or testing voltage to the primary side of the current transformer and / or voltage transformer of the compensated energy meter, and to collect the corresponding first current and / or first voltage on the secondary side; in response to the first current and / or first voltage satisfying the standard function relationship, it is determined that the energy meter compensation is complete.

[0039] The beneficial effects of this invention are as follows: 1. This invention collects electrical parameter data from the primary and secondary sides of the current transformer in an energy meter, fits the corresponding functional relationship, and compares it with a standard functional relationship to identify the parameters of the current transformer that need compensation, and then performs corresponding automatic compensation. Based on this, this invention can effectively distinguish the causes of energy meter errors and make targeted compensations for load resistance and permeability, making the compensation more accurate, thereby improving the measurement accuracy of the compensated energy meter. 2. Since the linear region is regular, an accurate linear relationship can be easily obtained with just a few data points. However, the nonlinear region is irregular and requires more data collection to make the fitted function closer to the actual function. Therefore, the acquisition module of this invention performs low-frequency acquisition in the linear region and high-frequency acquisition in the nonlinear region. This reduces the acquisition frequency and workload while ensuring the accuracy of the fitted function.

[0040] In summary, this invention provides differentiated compensation based on the differences in the measurement circuits of each main board in the energy meter. This allows for personalized adaptation of the compensation value for each main board during mass production, thereby improving the measurement accuracy of each energy meter at the time of manufacture. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the structure of an automatic parameter compensation device for an electricity meter provided in a specific embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram illustrating the first fitting function relationship provided in a specific embodiment of the present invention. Detailed Implementation

[0043] This invention discloses an automatic parameter compensation device for electricity meters. Those skilled in the art can refer to the content of this document and appropriately modify the technical details to implement it. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and are considered to be included in this invention. The methods and applications of this invention have been described through preferred embodiments. Those skilled in the art can obviously make modifications or appropriate changes and combinations to the methods and applications described herein without departing from the content, spirit, and scope of this invention to implement and apply the technology of this invention.

[0044] The applicant's research revealed that slight deviations in the manufacturing process of electricity meters can lead to inaccuracies. Specifically, variations in load resistance and permeability of the instrument transformers (current and voltage transformers) can cause inconsistencies in their small and large current responses, affecting the accuracy of electricity meter measurements at the time of manufacture. The primary and secondary electrical parameters of the instrument transformers are not always linear; a non-linear relationship exists between them. When the current is small, the magnetic core operates in a low magnetic field region, and the permeability dispersion leads to insufficient induced potential, resulting in a non-linear relationship between the primary and secondary electrical parameters when the current is below a certain value. Conversely, when the current is large, the magnetic core approaches saturation, causing the secondary current to also increase non-linearly. The size of the region corresponding to this non-linear relationship is related to the permeability. Appropriate resistance and permeability compensation for the instrument transformers can effectively improve the accuracy of the electricity meter.

[0045] Therefore, embodiments of the present invention provide an automatic parameter compensation device for electricity meters, such as... Figure 1 As shown, the automatic parameter compensation device for the electricity meter includes: a parameter acquisition module 101, a function fitting module 102, a compensation judgment module 103, a first compensation module 104, and a second compensation module 105.

[0046] The parameter acquisition module 101 is used to apply multiple corresponding standard currents and / or standard voltages to the primary side of the current transformer and / or voltage transformer of the energy meter, and to acquire the corresponding measurement current and / or measurement voltage on the secondary side to obtain multiple data sets; wherein, the data set includes a pair of corresponding standard currents and measurement currents, or a pair of corresponding standard voltages and measurement voltages;

[0047] The function fitting module 102 is used to fit the data set to obtain a first fitting function relationship between the secondary side electrical parameters and the primary side electrical parameters; wherein the electrical parameters include current and voltage, and the first fitting function relationship includes a head nonlinear region, a middle linear region and a tail nonlinear region.

[0048] The compensation judgment module 103 is used to compare the first fitted function relationship with the standard function relationship. If the first fitted function and the standard function relationship match perfectly, it is determined that the energy meter does not require parameter compensation. If the middle linear region does not match the standard function relationship, it is determined that the load resistance of the current transformer has deviated, and the first compensation module 104 is activated. If the head nonlinear region and the tail nonlinear region do not match the standard function relationship, it is determined that the permeability of the current transformer has deviated, and the second compensation module 105 is activated.

[0049] The first compensation module is used to compensate the load resistance for resistance deviation parameters based on the relationship between the central linear region and the standard function.

[0050] The second compensation module is used to compensate for the permeability deviation parameter based on the nonlinear region at the head and / or the nonlinear region at the tail.

[0051] It should be noted that the nonlinearity error of the current transformer is caused by the inconsistency in small-current / large-current response due to the difference in the permeability of its magnetic core. Specifically, when the current is small, the magnetic core operates in a low magnetic field region, and the dispersion of permeability leads to insufficient induced electromotive force, resulting in a nonlinear relationship between the primary and secondary electrical parameters. Conversely, when the current is large, the magnetic core approaches saturation, causing the secondary current to also increase nonlinearly. Therefore, due to the influence of permeability, the primary-side electrical parameters cannot be directly converted to secondary-side electrical parameters using a linear relationship at small and large currents; a specific functional relationship is required for the conversion. The range of these small and large currents is determined by the permeability. The range of small and large currents can be obtained based on the permeability.

[0052] In this specific embodiment, the first fitting function relationship corresponding to the current transformer can be as follows: Figure 2 As shown. Figure 2 This is merely for illustrative purposes to indicate that the first fitted function relationship has two nonlinear regions at the beginning and end, and a linear region in the middle. The actual graph is related to the specific values ​​of the turns ratio and permeability. Similar to the first fitted function relationship, current transformers also have linear and nonlinear regions due to the influence of their permeability, except that the size of the nonlinear region is related to the permeability.

[0053] Therefore, in the actual use of electricity meters, if the measured value is in the nonlinear region, the corresponding function for the nonlinear region needs to be calculated. However, if the measured value is in the linear region, the specific value can be obtained directly based on the linear relationship.

[0054] In this specific embodiment, the compensation determination module 103 is specifically used for:

[0055] The first fitted function relationship is compared with the standard function relationship; the standard function relationship includes the head standard nonlinear region, the middle standard linear region, and the tail standard nonlinear region.

[0056] If the first fitted function and the standard function are perfectly matched, then it is determined that the energy meter does not require parameter compensation.

[0057] If there is a difference between the middle linear region and the middle standard linear region, then the relationship between the middle linear region and the standard function is mismatched. It is determined that the load resistance of the transformer has deviated, and the first compensation module 104 is activated.

[0058] If the range of the first region corresponding to the head nonlinear region and the tail nonlinear region is different from the range of the standard region corresponding to the head standard nonlinear region and the tail standard nonlinear region, then the head nonlinear region and the tail nonlinear region do not match the standard function relationship, and it is determined that the permeability of the transformer has deviated, so that the second compensation module 105 is activated.

[0059] It should be noted that by comparing functions, it can be determined whether the inaccuracy of the current transformer is caused by a deviation in resistive load, a deviation in permeability, or both. If there is a deviation in resistive load, the linear region will inevitably show a deviation; if there is a deviation in permeability, the coverage of the nonlinear region will also show a deviation. This embodiment of the invention uses this principle to determine whether the inaccuracy of the current transformer is caused by a deviation in resistive load, a deviation in permeability, or both.

[0060] In this specific embodiment, the first compensation module is specifically used for:

[0061] The standard load resistance is obtained based on the standard function relationship; the actual load resistance is obtained based on the middle linear region.

[0062] Based on the standard load resistance and the actual load resistance, the load resistance is compensated for the resistance deviation parameter.

[0063] In this specific embodiment, compensation can be achieved by adjusting the linear relationship corresponding to the linear region of the standard function.

[0064] In another specific embodiment, compensation can be achieved by directly compensating for the resistance difference, making the standard load resistance the same as the actual load resistance.

[0065] In this specific embodiment, the second compensation module includes a magnetoresistive acquisition submodule and a permeability compensation submodule;

[0066] The reluctance acquisition submodule is used to obtain the reluctance of the current transformer based on the specific values ​​of the data sets corresponding to the head nonlinear region and / or the tail nonlinear region.

[0067] The permeability compensation submodule is used to obtain the actual permeability of the current transformer based on the magnetic reluctance; and to compensate for the permeability deviation parameter based on the actual permeability.

[0068] Furthermore, the magnetoresistive acquisition submodule is specifically used for:

[0069] When the transformer is a current transformer, according to

[0070]

[0071] Obtain magnetic reluctance; where, For standard current, For the corresponding measured current, The number of turns per side. For secondary side turns, For magnetic reluctance, For a current transformer, a resistive load. The angular frequency of the power supply. It is the imaginary unit of the power supply angular frequency;

[0072] When the transformer is a voltage transformer, according to

[0073]

[0074] Obtain magnetic reluctance; where, Standard voltage, For the corresponding measured voltage, The number of turns per side. For secondary side turns, For magnetic reluctance, The voltage transformer is a resistive load. The angular frequency of the power supply. The imaginary unit of the power supply angular frequency. It is the magnetizing inductor.

[0075] Furthermore, the permeability compensation submodule is specifically used for:

[0076] according to

[0077]

[0078] To obtain the actual permeability of the mutual inductor; where, For magnetic reluctance, The magnetic circuit length of the mutual inductor. Let be the cross-sectional area of ​​the magnetic core of the current transformer. This is the actual permeability.

[0079] Based on the actual permeability, permeability deviation parameters are compensated.

[0080] In this specific embodiment, by obtaining the permeability, the range of the nonlinear region and its functional relationship are obtained based on the permeability, and the linear region of the standard function is adjusted using the range of the nonlinear region and its functional relationship to achieve compensation.

[0081] In this specific embodiment, the parameter acquisition module 101 is specifically used for:

[0082] Apply a standard current or standard voltage corresponding to the middle range to the current transformer or voltage transformer, and collect the corresponding measured current or measured voltage; take two points on both sides of the middle range, apply the corresponding standard current or standard voltage, and collect the corresponding measured current or measured voltage, so that these three data form the first linear relationship;

[0083] Next, take two more points outwards, apply the corresponding standard current or standard voltage, collect the corresponding measurement current or measurement voltage, and determine whether the corresponding data set is in the first linear relationship. If not, the area between the point and the nearest point is determined as the high-frequency sampling area for sampling at the first frequency, and the area corresponding to the first linear relationship is determined as the low-frequency sampling area for sampling at the second frequency. If yes, repeat the operation until the newly added data set is not in the first linear relationship. The first frequency is greater than the second frequency.

[0084] It should be noted that the amount of data required to achieve the same fitting effect in linear and nonlinear regions differs. Linear regions require only a small amount of data to achieve a high-precision fitting effect, while nonlinear regions require significantly more data to achieve the same fitting effect. Therefore, this embodiment of the invention employs the above method to reduce the amount of data collected in linear regions while maintaining the fitting effect, thereby reducing the workload. Simultaneously, it increases the amount of data collected in nonlinear regions to improve the fitting effect in those regions.

[0085] In this specific embodiment, the automatic parameter compensation device for the electricity meter further includes: a verification module;

[0086] The testing module is used to apply a testing current and / or testing voltage to the primary side of the current transformer and / or voltage transformer of the compensated energy meter, and to collect the corresponding first current and / or first voltage on the secondary side; in response to the first current and / or first voltage satisfying the standard function relationship, the energy meter compensation is determined to be complete.

[0087] It should be noted that the verification module can prevent inaccurate compensation.

[0088] This invention collects electrical parameter data from the primary and secondary sides of the current transformer in an energy meter, fits the corresponding functional relationship, and compares it with a standard functional relationship to identify the parameters of the current transformer that require compensation. Then, it performs the corresponding automatic compensation. Based on this, this invention can effectively distinguish the causes of energy meter errors and make targeted compensations for load resistance and permeability, making the compensation more accurate and thus improving the measurement accuracy of the compensated energy meter.

[0089] Because linear regions are regular, a precise linear relationship can be easily obtained with just a few data points. Nonlinear regions, however, are irregular and require more data collection to make the fitted function more closely approximate the actual function. Therefore, the data acquisition module in this embodiment performs low-frequency data acquisition in linear regions and high-frequency data acquisition in nonlinear regions. This reduces the acquisition frequency and workload while ensuring the accuracy of the fitted function.

[0090] In summary, the embodiments of the present invention provide differentiated compensation based on the differences in the measurement circuits of each motherboard in the electricity meter. This allows for personalized adaptation of the compensation value for each motherboard during mass production, thereby improving the measurement accuracy of the electricity meter at the time of manufacture.

[0091] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0092] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0093] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. An automatic parameter compensation device for an electricity meter, characterized in that, The automatic parameter compensation device for the electricity meter includes: a parameter acquisition module, a function fitting module, a compensation judgment module, a first compensation module, and a second compensation module; The parameter acquisition module is used to apply multiple corresponding standard currents and / or standard voltages to the primary side of the current transformer and / or voltage transformer of the energy meter, and to acquire the corresponding measurement current and / or measurement voltage on the secondary side to obtain multiple data sets; wherein, the data set includes a pair of corresponding standard currents and measurement currents, or a pair of corresponding standard voltages and measurement voltages; The function fitting module is used to fit the data set to obtain a first fitting function relationship between the secondary side electrical parameters and the primary side electrical parameters; wherein the electrical parameters include current and voltage, and the first fitting function relationship includes a head nonlinear region, a middle linear region, and a tail nonlinear region. The compensation judgment module is used to compare the first fitted function relationship with the standard function relationship. If the first fitted function and the standard function relationship match perfectly, it is determined that the energy meter does not require parameter compensation. If the middle linear region does not match the standard function relationship, it is determined that the load resistance of the current transformer has deviated, and the first compensation module is activated. If the head nonlinear region and the tail nonlinear region do not match the standard function relationship, it is determined that the permeability of the current transformer has deviated, and the second compensation module is activated. The first compensation module is used to compensate the load resistor for resistance deviation parameters based on the relationship between the central linear region and the standard function. The second compensation module is used to compensate the permeability deviation parameter based on the head nonlinear region and / or tail nonlinear region; The parameter acquisition module is specifically used for: Apply the standard current or standard voltage corresponding to the middle range to the current transformer or voltage transformer, and collect the corresponding measurement current or measurement voltage; take two points on both sides of the middle range, apply the corresponding standard current or standard voltage, and collect the corresponding measurement current or measurement voltage, so that these three data form a first linear relationship; Next, two more points are selected outwards, and the corresponding standard current or standard voltage is applied. The corresponding measurement current or measurement voltage is collected, and it is determined whether the corresponding data group is in the first linear relationship. If not, the area between the point and the nearest point is determined as a high-frequency sampling area for sampling at the first frequency, and the area corresponding to the first linear relationship is determined as a low-frequency sampling area for sampling at the second frequency. If yes, the operation is repeated until the newly added data group is not in the first linear relationship. Wherein, the first frequency is greater than the second frequency.

2. The automatic parameter compensation device for an electricity meter according to claim 1, characterized in that, The compensation judgment module is specifically used for: The first fitted function relationship is compared with the standard function relationship; wherein the standard function relationship includes a head standard nonlinear region, a middle standard linear region, and a tail standard nonlinear region; If the first fitted function and the standard function are perfectly matched, it is determined that the energy meter does not require parameter compensation. In response to the difference between the central linear region and the central standard linear region, the relationship between the central linear region and the standard function is mismatched, it is determined that the load resistance of the current transformer has deviated, and the first compensation module is activated. If the range of the first region corresponding to the head nonlinear region and the tail nonlinear region is different from the range of the standard region corresponding to the head standard nonlinear region and the tail standard nonlinear region, then the head nonlinear region and the tail nonlinear region do not match the standard function relationship, and it is determined that the permeability of the mutual inductor has deviated, so that the second compensation module is activated.

3. The automatic parameter compensation device for an electricity meter according to claim 1, characterized in that, The first compensation module is specifically used for: The standard load resistance is obtained based on the standard functional relationship; the actual load resistance is obtained based on the central linear region. Based on the standard load resistance and the actual load resistance, the load resistance is compensated for resistance deviation parameters.

4. The automatic parameter compensation device for an electricity meter according to claim 1, characterized in that, The second compensation module includes a magnetoresistive acquisition submodule and a permeability compensation submodule; The magnetoresistive acquisition submodule is used to obtain the magnetoresistive force of the mutual inductor based on the specific values ​​of the data group corresponding to the head nonlinear region and / or the tail nonlinear region. The permeability compensation submodule is used to obtain the actual permeability of the current transformer based on the magnetic reluctance; and to compensate for the permeability deviation parameter based on the actual permeability.

5. The automatic parameter compensation device for an electricity meter according to claim 4, characterized in that, The magnetoresistive acquisition submodule is specifically used for: When the transformer is a current transformer, according to The magnetoresistive reluctance is obtained; wherein, The standard current, For the corresponding measured current, The number of turns per side. For secondary side turns, For the magnetoresistive, The current transformer is a resistive load. The angular frequency of the power supply. The imaginary unit of the angular frequency of the power supply; When the transformer is the voltage transformer, according to The magnetoresistive reluctance is obtained; wherein, The standard voltage is... For the corresponding measured voltage, The number of turns on the first side, The number of secondary side turns, For the magnetoresistive, The voltage transformer is a resistive load. The angular frequency of the power supply. The imaginary unit of the angular frequency of the power supply is... It is the magnetizing inductor.

6. The automatic parameter compensation device for an electricity meter according to claim 4, characterized in that, The permeability compensation submodule is specifically used for: according to The actual permeability of the mutual inductor is obtained; wherein, For the magnetoresistive, The magnetic circuit length of the current transformer is given. Let be the cross-sectional area of ​​the magnetic core of the current transformer. The actual permeability is... Based on the actual permeability, permeability deviation parameter compensation is performed on the permeability.

7. The automatic parameter compensation device for an electricity meter according to claim 1, characterized in that, The automatic parameter compensation device for the electricity meter also includes: a testing module; The testing module is used to apply a testing current and / or testing voltage to the primary side of the current transformer and / or voltage transformer of the compensated energy meter, and to collect the corresponding first current and / or first voltage on the secondary side; in response to the first current and / or first voltage satisfying the standard function relationship, it is determined that the energy meter compensation is complete.

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