阅读说明：本技术 电容互感器温度补偿方法及设备 (Temperature compensation method and equipment for capacitor transformer ) 是由 李洪卫 李正红 王其林 谭波 许卫东 张斌 何维 何明 李思尧 黄煜伟 于 2020-12-22 设计创作，主要内容包括：本发明涉及一种电容互感器温度补偿方法及设备,通过检测电容互感器的一次电压幅值,并获取环境温度信息,然后采用预设温度补偿模型处理一次电压幅值和环境温度信息以获取电容互感器的二次电压幅值,从而在不用测量的情况下即可获取二次电压幅值,该二次电压幅值为通过对历史数据的学习得到的经验值,由于考虑了环境温度的影响,更接近于真实的二次电压幅值,因此按照该值进行检测设备的量程选择不容易损坏检测设备。(The invention relates to a temperature compensation method and equipment for a capacitor transformer, which are characterized in that a primary voltage amplitude of the capacitor transformer is detected, environment temperature information is obtained, and then a preset temperature compensation model is adopted to process the primary voltage amplitude and the environment temperature information to obtain a secondary voltage amplitude of the capacitor transformer, so that the secondary voltage amplitude can be obtained without measurement, the secondary voltage amplitude is an empirical value obtained by learning historical data, and the range selection of the detection equipment according to the value is not easy to damage the detection equipment because the influence of the environment temperature is considered and is closer to the real secondary voltage amplitude.)

1. A temperature compensation method for a capacitive transformer is characterized by comprising the following steps:

detecting a primary voltage amplitude of the capacitor transformer;

acquiring environmental temperature information and the transformation ratio of the capacitance transformer;

and processing the primary voltage amplitude, the environment temperature information and the transformation ratio by adopting a preset temperature compensation model to obtain a secondary voltage amplitude of the capacitor transformer.

2. The method for compensating the temperature of the capacitive transformer according to claim 1, wherein the processing the primary voltage amplitude, the ambient temperature information and the transformation ratio by using a preset temperature compensation model to obtain the secondary voltage amplitude of the capacitive transformer comprises:

acquiring a ratio difference value according to the environment temperature information based on the mapping relation between the environment temperature and the ratio difference in the preset temperature compensation model;

and processing the primary voltage amplitude, the ratio difference value and the transformation ratio by adopting the preset temperature compensation model to obtain the secondary voltage amplitude.

3. The method for temperature compensation of a capacitive transformer according to claim 1, further comprising:

detecting a primary voltage phase angle of the capacitor transformer;

and processing the primary voltage phase angle and the environment temperature information by adopting the preset temperature compensation model to obtain a secondary voltage phase angle of the capacitor transformer.

4. The method for compensating for the temperature of the capacitive transformer according to claim 3, wherein the processing the primary voltage phase angle and the ambient temperature information using the preset temperature compensation model to obtain the secondary voltage phase angle of the capacitive transformer comprises:

acquiring an angle difference value according to the environment temperature information based on the mapping relation between the environment temperature and the angle difference in the preset temperature compensation model;

and processing the primary voltage phase angle and the angle difference value by adopting the preset temperature compensation model to obtain the secondary voltage phase angle.

5. The method of claim 3, wherein before the processing the primary voltage amplitude, the ambient temperature information, and the transformation ratio using a preset temperature compensation model and the processing the primary voltage phase angle and the ambient temperature information using the preset temperature compensation model, the method further comprises:

detecting an input voltage of the capacitor transformer;

and acquiring the preset temperature compensation model from the model set according to the input voltage.

6. The method for temperature compensation of a capacitive transformer according to claim 1, further comprising:

acquiring a plurality of groups of sample input voltages, sample primary voltage amplitudes, sample primary voltage phase angles, sample secondary voltage amplitudes and sample secondary voltage phase angles which respectively correspond to the environmental temperatures;

generating a model set according to each set of the sample input voltage, the sample primary voltage amplitude, the sample primary voltage phase angle, the sample secondary voltage amplitude, the sample secondary voltage phase angle, and the transformation ratio, the model set including a plurality of the preset temperature compensation models corresponding to each of the sample input voltages.

7. The method of claim 6, wherein the generating a set of models from the sets of the sample input voltage, the sample primary voltage magnitude, the sample primary voltage phase angle, the sample secondary voltage magnitude, the sample secondary voltage phase angle, and the transformation ratio comprises:

obtaining a difference value of each sample ratio according to each group of the primary voltage amplitude of the sample, the secondary voltage amplitude of the sample and the transformation ratio;

obtaining each sample angle difference value according to each group of the sample primary voltage phase angle and the sample secondary voltage phase angle;

generating a plurality of preset temperature compensation models according to the sample ratio difference values and the sample angle difference values;

and generating the model set according to each sample input voltage and each preset temperature compensation model.

8. The method for temperature compensation of a capacitive transformer according to claim 1, further comprising:

acquiring a secondary voltage detection value of the capacitor transformer;

and correcting the capacitor transformer according to the secondary voltage detection value.

9. A capacitance transformer temperature compensation device, comprising:

the detection module is used for detecting the primary voltage amplitude of the capacitor transformer;

the acquisition module is used for acquiring environmental temperature information and the transformation ratio of the capacitance transformer;

and the processor is used for processing the primary voltage amplitude, the environment temperature information and the transformation ratio by adopting a preset temperature compensation model so as to obtain a secondary voltage amplitude of the capacitance transformer.

10. A capacitance transformer temperature compensation device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any one of claims 1 to 8.

Technical Field

The invention relates to the technical field of radio frequency identification, in particular to a temperature compensation method and equipment for a capacitive transformer.

Background

The voltage transformer is mainly used for voltage measurement and electric energy measurement in an electric power system, and has higher requirements on the performance of the voltage transformer in some application scenes along with the rapid development of an optical fiber sensing technology and an optical fiber communication technology.

Compared with the traditional electromagnetic voltage transformer, the capacitor voltage transformer (also called as capacitor transformer) can prevent ferromagnetic resonance caused by saturation of the iron core of the voltage transformer, and has many advantages in economy and safety. The capacitance voltage division type electronic voltage transformer gradually replaces the traditional voltage transformer due to the advantages of high precision, wide frequency band and small volume, and is applied to the voltage measurement of a power system. However, the measurement accuracy of the capacitance voltage-dividing electronic voltage transformer is easily affected by temperature, so that an error exists between an actual secondary voltage amplitude and a theoretical secondary voltage amplitude, and when a detection device is selected to actually measure the secondary voltage amplitude, the measuring range is easily over-range, so that the detection device is damaged.

Disclosure of Invention

Based on this, it is necessary to provide a temperature compensation method and apparatus for a capacitive transformer.

A temperature compensation method for a capacitive transformer comprises the following steps:

detecting a primary voltage amplitude of the capacitor transformer;

acquiring environmental temperature information and the transformation ratio of the capacitance transformer;

and processing the primary voltage amplitude, the environment temperature information and the transformation ratio by adopting a preset temperature compensation model to obtain a secondary voltage amplitude of the capacitor transformer.

In one embodiment, the processing the primary voltage amplitude, the environmental temperature information, and the transformation ratio by using a preset temperature compensation model to obtain the secondary voltage amplitude of the capacitive transformer includes:

acquiring a ratio difference value according to the environment temperature information based on the mapping relation between the environment temperature and the ratio difference in the preset temperature compensation model;

and processing the primary voltage amplitude, the ratio difference value and the transformation ratio by adopting the preset temperature compensation model to obtain the secondary voltage amplitude.

In one embodiment, the temperature compensation method for the capacitive transformer further includes:

detecting a primary voltage phase angle of the capacitor transformer;

and processing the primary voltage phase angle and the environment temperature information by adopting the preset temperature compensation model to obtain a secondary voltage phase angle of the capacitor transformer.

In one embodiment, the processing the primary voltage phase angle and the ambient temperature information by using the preset temperature compensation model to obtain the secondary voltage phase angle of the capacitive transformer includes:

acquiring an angle difference value according to the environment temperature information based on the mapping relation between the environment temperature and the angle difference in the preset temperature compensation model;

and processing the primary voltage phase angle and the angle difference value by adopting the preset temperature compensation model to obtain the secondary voltage phase angle.

In one embodiment, before the processing the primary voltage amplitude, the environmental temperature information, and the transformation ratio with the preset temperature compensation model and the processing the primary voltage phase angle and the environmental temperature information with the preset temperature compensation model, the method for compensating the temperature of the capacitive transformer further includes:

detecting an input voltage of the capacitor transformer;

and acquiring the preset temperature compensation model from the model set according to the input voltage.

In one embodiment, the temperature compensation method for the capacitive transformer further includes:

acquiring a plurality of groups of sample input voltages, sample primary voltage amplitudes, sample primary voltage phase angles, sample secondary voltage amplitudes and sample secondary voltage phase angles which respectively correspond to the environmental temperatures;

generating a model set according to each set of the sample input voltage, the sample primary voltage amplitude, the sample primary voltage phase angle, the sample secondary voltage amplitude, the sample secondary voltage phase angle, and the transformation ratio, the model set including a plurality of the preset temperature compensation models corresponding to each of the sample input voltages.

In one embodiment, the generating a model set according to the respective sets of the sample input voltage, the sample primary voltage magnitude, the sample primary voltage phase angle, the sample secondary voltage magnitude, the sample secondary voltage phase angle, and the transformation ratio comprises:

obtaining a difference value of each sample ratio according to each group of the primary voltage amplitude of the sample, the secondary voltage amplitude of the sample and the transformation ratio;

obtaining each sample angle difference value according to each group of the sample primary voltage phase angle and the sample secondary voltage phase angle;

generating a plurality of preset temperature compensation models according to the sample ratio difference values and the sample angle difference values;

and generating the model set according to each sample input voltage and each preset temperature compensation model.

In one embodiment, the temperature compensation method for the capacitive transformer further includes:

acquiring a secondary voltage detection value of the capacitor transformer;

and correcting the capacitor transformer according to the secondary voltage detection value.

A capacitance transformer temperature compensation device comprising:

the detection module is used for detecting the primary voltage amplitude of the capacitor transformer;

the acquisition module is used for acquiring environmental temperature information and the transformation ratio of the capacitance transformer;

and the processor is used for processing the primary voltage amplitude, the environment temperature information and the transformation ratio by adopting a preset temperature compensation model so as to obtain a secondary voltage amplitude of the capacitance transformer.

A temperature compensation device for a capacitive transformer, comprising a memory storing a computer program and a processor implementing the steps of any of the above methods when the computer program is executed by the processor.

According to the temperature compensation method and device for the capacitor transformer, the primary voltage amplitude of the capacitor transformer is detected, the environment temperature information is obtained, the primary voltage amplitude and the environment temperature information are processed by adopting the preset temperature compensation model to obtain the secondary voltage amplitude of the capacitor transformer, so that the secondary voltage amplitude can be obtained under the condition of no measurement, the secondary voltage amplitude is an empirical value obtained by learning historical data, and the influence of the environment temperature is considered and is closer to the real secondary voltage amplitude, so that the detection device is not easily damaged by range selection of the detection device according to the value.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic flow chart of a temperature compensation method for a capacitive transformer according to an embodiment;

FIG. 2 is a schematic circuit diagram of a capacitive voltage divider portion of the capacitive transformer;

FIG. 3 is a schematic flow chart illustrating a temperature compensation method for a capacitive transformer according to another embodiment;

FIG. 4 is a schematic flow chart illustrating a temperature compensation method for a capacitive transformer according to another embodiment;

FIG. 5 is a schematic flow chart illustrating a method for compensating temperature of a capacitive transformer in another embodiment;

FIG. 6 is a schematic flow chart illustrating a temperature compensation method for a capacitive transformer according to another embodiment;

FIG. 7 is a schematic flow chart illustrating a temperature compensation method for a capacitive transformer according to another embodiment;

fig. 8 is a schematic flowchart of a temperature compensation method for a capacitive transformer according to another embodiment.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, a first resistance may be referred to as a second resistance, and similarly, a second resistance may be referred to as a first resistance, without departing from the scope of the present application. The first resistance and the second resistance are both resistances, but they are not the same resistance.

It is to be understood that "connection" in the following embodiments is to be understood as "electrical connection", "communication connection", and the like if the connected circuits, modules, units, and the like have communication of electrical signals or data with each other.

As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.

The capacitance transformer comprises two parts, wherein one part is a capacitance voltage division part, namely a primary part, and is used for coupling and voltage division; the other part is the data processing part, i.e. the secondary part. The temperature coefficients of the capacitors of the capacitor voltage division parts are the same, so that the influence of the temperature on the voltage division can be ignored, and the influence of the temperature on the capacitor transformer mainly comes from the data processing part, namely the secondary part.

Fig. 1 is a schematic flowchart of a temperature compensation method for a capacitive transformer according to an embodiment, and as shown in fig. 1, the temperature compensation method for a capacitive transformer includes steps S110 to S130.

And step S110, detecting the primary voltage amplitude of the capacitor transformer.

FIG. 2 is a schematic circuit diagram of a capacitor voltage dividing portion of the capacitor transformer, as shown in FIG. 2, the primary voltage amplitude is the capacitor C₂Corresponding voltage U₂Voltage U₂Is the input voltage of the data processing section.

And step S120, acquiring environmental temperature information and the transformation ratio of the capacitance transformer.

Wherein, the environmental temperature information can be collected through a temperature sensor; the transformation ratio of the capacitance transformer can be obtained according to the product model.

And step S130, processing the primary voltage amplitude, the environment temperature information and the transformation ratio by adopting a preset temperature compensation model to obtain a secondary voltage amplitude of the capacitor transformer.

The preset temperature compensation model can store the primary voltage amplitude, the environmental temperature information and the mapping relation between the transformation ratio and the secondary voltage amplitude, for example, the mapping relation can be stored in the preset temperature compensation model in the form of a function, a corresponding table and a fitting curve, and the secondary voltage amplitude of the capacitive transformer can be obtained according to the primary voltage amplitude, the environmental temperature information and the transformation ratio which are obtained through measurement based on the preset temperature compensation model.

It can be understood that the capacitance transformer is generally used for reducing the input voltage, then the output end of the capacitance transformer can be connected with the detection device to detect the output voltage of the capacitance transformer, because the transformation ratio and the voltage-dividing capacitance parameters of the capacitance transformer are known, the secondary voltage amplitude can be calculated firstly according to the input voltage and each parameter when the detection device is used for detection, and then the range of the detection device is selected, when the environmental temperature changes, because the precision of the capacitance transformer can be influenced, the error can exist between the calculated secondary voltage amplitude and the true value according to the parameters of the capacitance transformer under the rated working environment, if the range of the detection device is still selected according to the calculated secondary voltage amplitude, the range of the range is possibly too large or too small, and the condition that the measurement is inaccurate or the range of the range is exceeded, and the detection. In the embodiment, the influence of temperature on the capacitor transformer is considered, the secondary voltage amplitude value can be obtained by using the preset temperature compensation model, is an empirical value obtained by learning historical data and is closer to a true value, so that the detection equipment is not easily damaged by selecting the range of the detection equipment according to the value, and the detected value is more accurate because the selected range is more fit with the numerical range of the true value.

According to the embodiment of the invention, the primary voltage amplitude of the capacitor transformer is detected, the environment temperature information and the transformation ratio of the capacitor transformer are acquired, and then the primary voltage amplitude, the transformation ratio and the environment temperature information are processed by adopting the preset temperature compensation model to acquire the true theoretical secondary voltage amplitude of the capacitor transformer, wherein the secondary voltage amplitude is an empirical value obtained by learning historical data, and the influence of the environment temperature is considered and is closer to the true secondary voltage amplitude, so that the detection equipment is not easily damaged by carrying out range selection on the detection equipment according to the value, and the detected value is more accurate as the selected range is more fit with the value range of the true value.

Fig. 3 is a schematic flow chart of a temperature compensation method for a capacitive transformer according to another embodiment, and the present embodiment differs from the embodiment of fig. 1 only in that the step of processing the primary voltage amplitude, the ambient temperature information, and the transformation ratio by using a preset temperature compensation model to obtain the secondary voltage amplitude of the capacitive transformer further includes step S131 and step S132.

Step S131, obtaining a ratio difference value according to the environmental temperature information based on the mapping relation between the environmental temperature and the ratio difference in the preset temperature compensation model.

The secondary voltage of the capacitor transformer can be influenced by the ambient temperature, the preset temperature compensation model stores the mapping relation between the specific difference of the capacitor transformer and the ambient temperature, and the mapping relation can be in the form of a function, a corresponding table, a fitting curve and the like.

And step S132, processing the primary voltage amplitude, the transformation ratio and the ratio difference value by adopting a preset temperature compensation model to obtain a secondary voltage amplitude.

It can be understood that the obtained ratio difference value is an error value influenced by the ambient temperature, the preset temperature compensation model can store the mapping relation between the primary voltage amplitude value, the transformation ratio and the ratio difference value and the secondary voltage amplitude value, and the secondary voltage amplitude value can be obtained according to the known primary voltage amplitude value, the transformation ratio and the ratio difference value. In one embodiment, the mapping relationship may be a function formula, specifically, the mapping relationship may be a primary voltage amplitude multiplied by a sum of a ratio difference and the primary voltage amplitude, and then a quotient is obtained for the transformation ratio, and finally a true theoretical secondary voltage amplitude may be obtained according to the function formula.

The embodiment of the invention is based on the mapping relation between the environmental temperature and the ratio difference in the preset temperature compensation model, obtains the ratio difference value according to the environmental temperature information, and further adopts the preset temperature compensation model to process the primary voltage amplitude value, the ratio difference value and the transformation ratio to obtain the secondary voltage amplitude value.

Fig. 4 is a schematic flow chart of a temperature compensation method for a capacitive transformer according to another embodiment, and compared with the embodiment of fig. 1, steps S410 to S420 are further added in this embodiment, as shown in fig. 4.

And step S410, detecting a primary voltage phase angle of the capacitor transformer.

Wherein, the primary voltage phase angle can be measured by adopting a voltage vector acquisition device.

And step S420, processing the primary voltage phase angle and the environment temperature information by adopting a preset temperature compensation model to obtain a secondary voltage phase angle of the capacitor transformer.

It can be understood that the preset temperature compensation model may store a mapping relationship between the primary voltage phase angle and the environmental temperature information and the secondary voltage phase angle, for example, the mapping relationship may be stored in the preset temperature compensation model in the form of a function, a correspondence table, or a fitting curve, and based on the preset temperature compensation model, the secondary voltage phase angle of the capacitive transformer may be obtained according to the measured primary voltage phase angle and the environmental temperature information.

It can be understood that, under the normal condition, the phase difference between the ideal secondary voltage and the primary voltage of the capacitor transformer is 180 °, and when the ambient temperature deviates from the ideal temperature of the capacitor transformer, the secondary voltage phase angle has an error, so that the primary voltage phase angle and the ambient temperature information can be processed by adopting a preset temperature compensation model, and the secondary voltage phase angle of the capacitor transformer can be directly obtained quickly and accurately. In one embodiment, after the secondary voltage phase angle is obtained by using the preset temperature compensation model, it may be further determined whether a difference between the primary voltage phase angle and the secondary voltage phase angle exceeds a threshold, and if the difference exceeds the threshold, the capacitance transformer may be adjusted to counteract the influence of the ambient temperature.

According to the embodiment of the invention, the primary voltage phase angle of the capacitor transformer is detected, and the primary voltage phase angle and the environmental temperature information are processed by adopting the preset temperature compensation model to obtain the secondary voltage phase angle of the capacitor transformer, so that the method is rapid and accurate. And after the secondary voltage phase angle is obtained by using the preset temperature compensation model, whether the difference between the primary voltage phase angle and the secondary voltage phase angle exceeds a threshold value or not can be judged, and if the difference exceeds the threshold value, the capacitance transformer can be adjusted to counteract the influence of the environmental temperature.

Fig. 5 is a schematic flow chart of a temperature compensation method for a capacitive transformer in another embodiment, which is different from the embodiment in fig. 4 only in that the step of processing the primary voltage phase angle and the ambient temperature information by using a preset temperature compensation model to obtain the secondary voltage phase angle of the capacitive transformer includes steps S421 to S422.

Step S421, based on the mapping relationship between the ambient temperature and the angular difference in the preset temperature compensation model, obtaining the angular difference according to the ambient temperature information.

The secondary voltage phase angle of the capacitor transformer can be influenced by the ambient temperature, the preset temperature compensation model stores the mapping relation between the angular difference of the capacitor transformer and the ambient temperature, the mapping relation can be in the form of a function, a corresponding table, a fitting curve and the like, and the angular difference value of the capacitor transformer can be obtained according to ambient temperature information based on the mapping relation.

Step S422, the primary voltage phase angle and the angle difference value are processed by adopting a preset temperature compensation model to obtain a secondary voltage phase angle.

It can be understood that the obtained angle difference value is an error value affected by the ambient temperature, the preset temperature compensation model may store a primary voltage phase angle and a mapping relationship between the angle difference value and a secondary voltage phase angle, and the secondary voltage phase angle may be obtained according to the known primary voltage phase angle and the known angle difference value. In one embodiment, the mapping relationship may be a functional formula, specifically, the sum of the primary voltage phase angle and the angle difference and the 180 ° angle, and the real theoretical secondary voltage phase angle can be finally obtained according to the functional formula.

According to the embodiment of the invention, based on the mapping relation between the environmental temperature and the angular difference in the preset temperature compensation model, the angular difference value is obtained according to the environmental temperature information, and then the preset temperature compensation model is adopted to process the primary voltage phase angle and the angular difference value to obtain the secondary voltage phase angle, so that the real theoretical secondary voltage phase angle is obtained.

Fig. 6 is a schematic flowchart of a temperature compensation method for a capacitive transformer according to another embodiment, which is different from the embodiment of fig. 4 only in that the temperature compensation method for a capacitive transformer further includes steps S610 to S620 before the voltage amplitude and the ambient temperature information are processed by using a preset temperature compensation model and the voltage phase angle and the ambient temperature information are processed by using a preset temperature compensation model.

Step S610, detecting an input voltage of the capacitive transformer.

It can be understood that the input voltage of the capacitor transformer is U in fig. 2₁For the same capacitor transformer, when the input voltages are different, the amplitude and the phase angle of the actually output secondary voltage can deviate from the amplitude and the phase angle of the theoretically output secondary voltage.

Step S620, acquiring a preset temperature compensation model from the model set according to the input voltage.

The model is centrally stored with a plurality of preset temperature compensation models, and because the input voltage can affect the secondary voltage amplitude and the secondary voltage phase angle, the ratio difference value and the angle difference value are different when the input voltage is different, so that the corresponding preset temperature compensation models can be selected from the model set according to the input voltage, and the accuracy of the obtained secondary voltage amplitude and the secondary voltage phase angle is higher.

Fig. 7 is a schematic flowchart of a temperature compensation method for a capacitive transformer according to another embodiment, where the temperature compensation method for a capacitive transformer in this embodiment further includes steps S710 to S720, as shown in fig. 7.

Step S710, a plurality of groups of sample input voltages, sample primary voltage amplitudes, sample primary voltage phase angles, sample secondary voltage amplitudes, and sample secondary voltage phase angles, which respectively correspond to the environmental temperatures, are obtained.

Step S720, generating a model set according to each group of sample input voltage, sample primary voltage amplitude, sample primary voltage phase angle, sample secondary voltage amplitude, sample secondary voltage phase angle and transformation ratio, wherein the model set comprises a plurality of preset temperature compensation models corresponding to each sample input voltage.

It can be understood that before obtaining the preset temperature compensation model from the model set according to the input voltage, the model set needs to be established according to each sample data. Specifically, each group of sample values under the same sample input voltage can be firstly put into one data set, then each sample value is modeled by taking the environmental temperature as a variable, so that a preset temperature compensation model corresponding to the sample input voltage is obtained, then the operation is repeated, finally a plurality of preset temperature compensation models corresponding to each sample input voltage are obtained, and one model set is generated. The preset temperature compensation model stores a mapping relation between a primary voltage amplitude, environmental temperature information and a transformation ratio and a secondary voltage amplitude, and also stores a mapping relation between a primary voltage phase angle and a secondary voltage phase angle and a mapping relation between the environmental temperature information and the secondary voltage phase angle.

Fig. 8 is a schematic flowchart of a temperature compensation method for a capacitive transformer according to another embodiment, which is different from the embodiment of fig. 7 only in that the step of generating a model set according to each set of sample input voltage, sample primary voltage amplitude, sample primary voltage phase angle, sample secondary voltage amplitude, sample secondary voltage phase angle, and transformation ratio includes steps S721 to S724.

And step S721, obtaining the difference value of each sample ratio according to the primary voltage amplitude of each group of samples, the secondary voltage amplitude of each group of samples and the transformation ratio.

Wherein the sample ratio difference is equal to the product of the sample secondary voltage amplitude and the transformation ratio minus the sample primary voltage amplitude, then divided by the sample primary voltage amplitude.

Step S722, obtaining each sample angle difference value according to each group of sample primary voltage phase angles and sample secondary voltage phase angles.

Wherein the sample angle difference is equal to the phase difference between the sample secondary voltage phase angle minus 180 ° and the primary voltage phase angle.

Step S723, generating a plurality of preset temperature compensation models according to the sample ratio difference values and the sample angle difference values.

It can be understood that each sample ratio difference value and each sample angle difference value respectively correspond to the ambient temperature one to one, and a plurality of preset temperature compensation models can be generated according to each sample ratio difference value and each sample angle difference value by taking the ambient temperature as a variable.

Step S724, generating a model set according to each sample input voltage and each preset temperature compensation model.

It can be understood that, since the input voltage may affect the amplitude of the secondary voltage and the phase angle of the secondary voltage, and thus the input voltage is different, the ratio difference and the angle difference are also different, and therefore, the model set may be generated according to the corresponding relationship between the input voltage and each preset temperature compensation model.

In one embodiment, the method for compensating the temperature of the capacitor transformer further comprises the steps of acquiring a secondary voltage detection value of the capacitor transformer, and then correcting the capacitor transformer according to the secondary voltage detection value.

It can be understood that after the secondary voltage amplitude of the capacitor transformer is obtained, detection equipment with a proper range can be selected to detect the capacitor transformer, so that an accurate secondary voltage detection value is obtained, and the capacitor transformer can be corrected. Specifically, the secondary voltage detection value can be compared with a theoretical secondary voltage amplitude value obtained by calculating according to the transformation ratio of the capacitor transformer, and if the error is too large, the capacitor transformer can be corrected.

It should be understood that although the various steps in the flowcharts of fig. 1, 3-8 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 1 and 3-8 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed alternately or alternately with other steps or at least some of the other steps.

The invention also provides temperature compensation equipment of the capacitor transformer, which comprises a detection module, an acquisition module and a processor, wherein the detection module is used for detecting the primary voltage amplitude of the capacitor transformer, the acquisition module is used for acquiring the environmental temperature information, and the processor is used for processing the primary voltage amplitude and the environmental temperature information by adopting a preset temperature compensation model to acquire the secondary voltage amplitude of the capacitor transformer.

In one embodiment, the processor is further configured to obtain a ratio difference value according to the ambient temperature information based on a mapping relationship between the ambient temperature and the ratio difference in the preset temperature compensation model; and then processing the primary voltage amplitude, the ratio difference value and the transformation ratio by adopting a preset temperature compensation model to obtain a secondary voltage amplitude.

In one embodiment, the detection module is further configured to detect a primary voltage phase angle of the capacitive transformer; the processor is further used for processing the primary voltage phase angle and the environment temperature information by adopting a preset temperature compensation model to obtain a secondary voltage phase angle of the capacitor transformer.

In one embodiment, the processor is further configured to obtain an angle difference value according to the ambient temperature information based on a mapping relationship between the ambient temperature and the angle difference in a preset temperature compensation model; and processing the primary voltage phase angle and the angle difference value by adopting a preset temperature compensation model to obtain a secondary voltage phase angle.

In one embodiment, the detection module is further configured to detect an input voltage of the capacitive transformer; the processor is further used for obtaining a preset temperature compensation model from the model set according to the input voltage.

In one embodiment, the obtaining module is further configured to obtain a plurality of groups of sample input voltages, sample primary voltage amplitudes, sample primary voltage phase angles, sample secondary voltage amplitudes, and sample secondary voltage phase angles, which respectively correspond to the environmental temperatures; the processor is further configured to generate a model set from each set of sample input voltages, sample primary voltage magnitudes, sample primary voltage phase angles, sample secondary voltage magnitudes, and sample secondary voltage phase angles and transformation ratios, the model set including a plurality of preset temperature compensation models corresponding to each sample input voltage.

In one embodiment, the processor is further configured to obtain each sample ratio difference value according to each group of sample primary voltage amplitudes, sample secondary voltage amplitudes, and the transformation ratio, obtain each sample angle difference value according to each group of sample primary voltage phase angles and sample secondary voltage phase angles, generate a plurality of preset temperature compensation models according to each sample ratio difference value and each sample angle difference value, and finally generate a model set according to each sample input voltage and each preset temperature compensation model.

In one embodiment, the obtaining module is further configured to obtain a secondary voltage detection value of the capacitor transformer; the temperature compensation equipment for the capacitor transformer further comprises a correction module used for correcting the capacitor transformer according to the secondary voltage detection value.

The embodiment of the present invention further provides a temperature compensation device for a capacitive transformer, which includes a memory and a processor, where the memory stores a computer program, and the processor implements the steps of the method in any of the above embodiments when executing the computer program.

Embodiments of the present invention further provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method of any of the above embodiments.

In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.