A standard capacitance voltage divider for measuring a wide range of voltages and a method of measurement

Abstract

The application discloses a standard capacitance voltage divider for measuring wide-range voltage and a measuring method. The standard capacitance voltage divider for measuring wide-range voltage comprises an insulating outer cylinder, an electrode module arranged at the upper end inside the insulating outer cylinder and a low-voltage arm module arranged at the bottom outside of the insulating outer cylinder. The electrode module comprises a high-voltage electrode, a low-voltage electrode and a shielding electrode. The high-voltage electrode, the low-voltage electrode and the shielding electrode are coaxially combined. The lower end of the shielding electrode is connected with a lower flange arranged at the bottom of the insulating outer cylinder through a supporting rod. The low-voltage arm module comprises a low-voltage arm external box and a low-voltage arm. The low-voltage arm external box is fixed at the lower end of the lower flange. The low-voltage arm is arranged in the low-voltage arm external box. The wide dynamic voltage can be reliably and accurately measured.

Description

Technical Field

[0001] This invention relates to the field of high voltage divider technology, and more specifically, to a standard capacitive voltage divider and a measurement method for measuring a wide range of voltages. Background Technology

[0002] Developing new technologies to support the construction of a new power system with a high proportion of new energy sources such as photovoltaics and wind power. In recent years, my country's new energy power generation has developed rapidly. Solar and wind power generation differs from traditional fossil fuel power generation in that they are significantly affected by environmental and climatic characteristics, exhibiting obvious randomness, volatility, and intermittency. The integration of a high proportion of new energy sources into the grid will have a profound impact on the safe and stable operation of the grid. This will impact the accuracy of traditional electricity metering equipment (including voltage and current transformers), electricity metering algorithms, electricity meter calibration, and traceability, affecting the fairness of electricity trading.

[0003] In high-proportion renewable energy power systems, the voltage and current fluctuations generated by renewable energy sources such as wind and solar power have a wider frequency band and faster time-domain changes compared to traditional power grid fluctuations. Traditional voltage transformers are mainly made based on the principle of electromagnetic induction, which can accurately measure power frequency and harmonic (<2.5kHz) voltages within a certain range, but cannot accurately respond to and measure wide dynamic range signals (DC-100kHz full frequency band). Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a standard capacitive voltage divider and measurement method for measuring a wide range of voltages, which can reliably and accurately measure wide dynamic voltages.

[0005] According to one aspect of the present invention, a standard capacitive voltage divider for measuring a wide range of voltages is provided, comprising: an insulating outer cylinder, an electrode module disposed at the upper end inside the insulating outer cylinder, and a low-voltage arm module disposed at the outer side of the bottom of the insulating outer cylinder, wherein...

[0006] The electrode module includes a high-voltage electrode, two low-voltage electrodes of different lengths, and a shielding electrode. The high-voltage electrode, low-voltage electrode, and shielding electrode are coaxially combined, and the lower end of the shielding electrode is connected to the lower flange located at the bottom of the insulating outer cylinder via a support rod.

[0007] The low-pressure arm module includes a low-pressure arm external box and a low-pressure arm, wherein the low-pressure arm external box is fixed to the lower end of the lower flange, and the low-pressure arm is set inside the low-pressure arm external box.

[0008] Optionally, the radius of the high-voltage electrode is larger than the radius of the low-voltage electrode and the shielding electrode, and the shielding electrode and the low-voltage electrode are located at the coaxial center. The high-voltage electrode and two low-voltage electrodes of different lengths form two different coaxial capacitors.

[0009] Optionally, the shielding electrode is connected to the low-voltage electrode in three sections (upper, middle, and lower), and the shielding electrode and the low-voltage electrode are connected by an electrode insulating plate, wherein the projected area of ​​the shielding electrode covers the projected area of ​​the low-voltage electrode.

[0010] Optionally, the lower end of the shielding electrode is connected to the support rod via an insulating support member, wherein the lead wires of the low-voltage electrode and the shielding electrode are led out from the inside of the support rod, and the support rod is connected to the ground potential.

[0011] Optionally, it also includes: an electrode core, wherein

[0012] The lower flange is provided with a lead-out hole. One end of the electrode core is connected to the lead-out wires of the low-voltage electrode and the shielding electrode. The electrode core passes through the insulating lead-out bushing and is led out from the lead-out hole with the help of the sealing ring.

[0013] Optionally, the electrode core corresponding to the low-voltage electrode is connected to the first end of the low-voltage arm, the end of the low-voltage arm is connected to the first output port and the second output port of the low-voltage arm external box, and the electrode core corresponding to the shielding electrode is connected to the third output port of the low-voltage arm external box.

[0014] Optionally, sulfur hexafluoride gas is provided inside the insulating outer cylinder.

[0015] According to another aspect of the present invention, a method for wide-range voltage measurement using the above-described standard capacitive voltage divider is provided, comprising:

[0016] Connect the wide dynamic range voltage signal source to be measured to the high voltage electrode of the standard capacitive voltage divider via a wire;

[0017] Connect the standard capacitive voltage divider to the measurement circuit, which is used to receive the measurement voltage signal from the standard capacitive voltage divider.

[0018] The measurement circuit amplifies the measured voltage signal to its initial value according to the preset voltage division ratio of the standard capacitor voltage divider, thereby determining the voltage waveform of the wide dynamic range voltage signal to be measured.

[0019] Optionally, the operation of connecting the wide dynamic range voltage signal source to be measured to the high-voltage electrode of a standard capacitive voltage divider via wires includes:

[0020] Connect the wide dynamic range voltage signal source to be measured to the damping resistor via a wire, and connect the other end of the damping resistor to the high voltage electrode of a standard capacitive voltage divider.

[0021] Optionally, it also includes connecting the lead of the shielding electrode of a standard capacitive voltage divider to the shielding potential.

[0022] Optionally, the operation of connecting a standard capacitive voltage divider to the measurement circuit includes:

[0023] Connect the first and third output ports of the standard capacitor voltage divider to ground, and connect the second output port of the standard capacitor voltage divider to the data acquisition unit of the measurement circuit via a cable.

[0024] Optionally, the operation of connecting the standard capacitive voltage divider to the measurement circuit also includes:

[0025] Connect the second and third output ports of the standard capacitor voltage divider to ground, and connect the first output port of the standard capacitor voltage divider to the data acquisition unit of the measurement circuit via a cable.

[0026] Optionally, the measurement circuit amplifies the measured voltage signal to its initial value according to the preset voltage division ratio of the standard capacitor voltage divider, and determines the voltage waveform of the wide dynamic range voltage signal to be measured, including:

[0027] The measurement software of the measurement circuit receives the measurement voltage signal from the data acquisition unit and amplifies the measurement voltage signal to the initial value according to the preset voltage division ratio to determine the voltage waveform of the wide range voltage signal to be measured.

[0028] According to another aspect of the present invention, a computer-readable storage medium is provided, the storage medium storing a computer program for performing a measurement method of the measurement loop described in any of the preceding aspects of the present invention.

[0029] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising: a processor; a memory for storing executable instructions of the processor; the processor being configured to read the executable instructions from the memory and execute the instructions to implement the measurement method of the measurement loop according to any of the preceding aspects of the present invention.

[0030] Therefore, the standard capacitive voltage divider for measuring a wide range of voltages provided in this application, through a coaxial voltage divider with dual voltage-ratio capacitors in the electrode module, an externally mounted low-voltage arm, and fully shielded low-voltage electrodes and measurement leads, can accurately measure wide dynamic range voltage signals. By adjusting the required voltage division ratio, wide dynamic range voltage waveform signals can be measured at different voltage division ratios. This enables accurate measurement of wide dynamic range voltages, filling the gap in current wide dynamic range voltage measurement devices and methods for applications with high proportions of renewable energy access. Furthermore, the measurement method provided by this invention, utilizing this standard capacitive voltage divider and conventional laboratory measurement equipment, can effectively and accurately measure wide dynamic range voltage signals at two different voltage division ratio parameters. Attached Figure Description

[0031] Exemplary embodiments of the present invention can be more fully understood by referring to the following figures:

[0032] Figure 1This is a schematic diagram of a standard capacitive voltage divider for measuring a wide range of voltages provided in an exemplary embodiment of the present invention;

[0033] Figure 2 This is a schematic flowchart of a method for measuring a wide range of voltages provided in an exemplary embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of a standard capacitive voltage divider for measuring voltage, provided in an exemplary embodiment of the present invention.

[0035] Figure 4 This is the structure of an electronic device provided in an exemplary embodiment of the present invention. Detailed Implementation

[0036] Hereinafter, exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments of the present invention. It should be understood that the present invention is not limited to the exemplary embodiments described herein.

[0037] It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention.

[0038] Those skilled in the art will understand that the terms "first," "second," etc., in the embodiments of the present invention are only used to distinguish different steps, devices, or modules, and do not represent any specific technical meaning, nor do they indicate a necessary logical order between them.

[0039] It should also be understood that in the embodiments of the present invention, "multiple" can refer to two or more, and "at least one" can refer to one, two or more.

[0040] It should also be understood that any component, data or structure mentioned in the embodiments of the present invention can generally be understood as one or more unless explicitly defined or given contrary instructions in the context.

[0041] Furthermore, the term "and / or" in this invention is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this invention generally indicates that the preceding and following related objects have an "or" relationship.

[0042] It should also be understood that the description of the various embodiments in this invention emphasizes the differences between the various embodiments, and the similarities or similarities can be referred to each other. For the sake of brevity, they will not be described in detail.

[0043] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0044] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0045] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0046] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0047] The embodiments of this invention can be applied to electronic devices such as terminal devices, computer systems, and servers, and can operate together with a wide range of other general-purpose or special-purpose computing system environments or configurations. Well-known examples of terminal devices, computing systems, environments, and / or configurations suitable for use with electronic devices such as terminal devices, computer systems, and servers include, but are not limited to: personal computer systems, server computer systems, thin clients, thick clients, handheld or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputer systems, mainframe computer systems, and distributed cloud computing environments including any of the above systems, etc.

[0048] Electronic devices such as terminal devices, computer systems, and servers can be described in the general context of computer system executable instructions (such as program modules) executed by a computer system. Typically, program modules can include routines, programs, object programs, components, logic, data structures, etc., which perform specific tasks or implement specific abstract data types. Computer systems / servers can be implemented in distributed cloud computing environments, where tasks are executed by remote processing devices linked through communication networks. In distributed cloud computing environments, program modules can reside on local or remote computing system storage media, including storage devices.

[0049] Example 1

[0050] Figure 1 This is a schematic diagram of a standard capacitive voltage divider for measuring a wide range of voltages provided in an exemplary embodiment of the present invention. Figure 1 As shown, a standard capacitive voltage divider for measuring a wide voltage range includes: an insulating outer cylinder 10, an electrode module 20 disposed inside the upper part of the insulating outer cylinder 10, and a low-voltage arm module 30 disposed on the outer side of the bottom of the insulating outer cylinder 10.

[0051] The electrode module 20 includes a high-voltage electrode 210, two low-voltage electrodes 220 of different lengths, and a shielding electrode 230. The high-voltage electrode 210, the low-voltage electrode 220, and the shielding electrode 230 are coaxially combined. The lower end of the shielding electrode 230 is connected to the lower flange 50 located at the bottom of the insulating outer cylinder 10 via a support rod 40.

[0052] The low-pressure arm module 30 includes a low-pressure arm external box 310 and a low-pressure arm 320, wherein the low-pressure arm external box 310 is fixed to the lower end of the lower flange 50, and the low-pressure arm 320 is disposed inside the low-pressure arm external box 310.

[0053] As described in the background section, in high-proportion renewable energy power systems, the voltage and current fluctuations generated by renewable energy sources such as wind and solar power have a wider frequency band and faster time-domain changes compared to traditional power grid fluctuations. Traditional voltage transformers are mainly made based on the principle of electromagnetic induction, which can accurately measure power frequency and harmonic (<2.5kHz) voltages within a certain range, but cannot accurately respond to and measure wide dynamic range signals (DC-100kHz full frequency band).

[0054] In view of this, the standard capacitive voltage divider for measuring a wide range of voltages provided in this application, through a coaxial voltage divider with dual voltage-dividing ratio capacitors in the electrode module, with the low-voltage arm externally mounted and the low-voltage electrode fully shielded from the measurement leads, can accurately measure wide dynamic range voltage signals. By adjusting the required voltage division ratio, it enables the measurement of wide dynamic range voltage waveform signals at different voltage division ratios.

[0055] Optionally, the radius of the high-voltage electrode 210 is larger than the radius of the low-voltage electrode 220 and the shielding electrode 230, and the shielding electrode 230 and the low-voltage electrode 220 are located at the coaxial center. The high-voltage electrode 210 and the two low-voltage electrodes 220 with different lengths form two different coaxial capacitors.

[0056] Specifically, refer to Figure 1 As shown, the high-voltage electrode, low-voltage electrode, and shielding electrode in the electrode module are coaxially combined. The high-voltage electrode has the largest radius and completely encloses the low-voltage electrode and shielding electrode. The shielding electrode and low-voltage electrode are located at the coaxial center. The high-voltage electrode and two low-voltage electrodes of different lengths form two coaxial capacitors with different capacitances. These two coaxial capacitors can be used individually or in parallel, thereby achieving different voltage division ratios for voltage measurement.

[0057] In addition, standard capacitor dividers use Figure 1The structure shown has high-voltage capacitors of 10pF and 20pF respectively. Preferably, when a 20pF high-voltage capacitor is selected, the low-voltage arm capacitor is 10nF, and the corresponding standard capacitor voltage division ratio is 500. The output port of the 10pF high-voltage capacitor is grounded, the low-voltage arm shell is grounded, and the shielding electrode lead is connected to the shielding potential. The output port of the 20pF high-voltage capacitor is led out through a cable.

[0058] Optionally, the shielding electrode 230 is connected to the low-voltage electrode 220 in three sections (upper, middle, and lower), and the shielding electrode 230 and the low-voltage electrode 220 are connected by an electrode insulating plate 610, wherein the projected area of ​​the shielding electrode 230 covers the projected area of ​​the low-voltage electrode 220.

[0059] Specifically, refer to Figure 1 As shown, the projected area of ​​the shielding electrode located at the center of the axis can completely cover the projected area of ​​the low-voltage electrode. It is connected to the low-voltage electrode in an insulated manner through three sections (upper, middle, and lower), so that the two low-voltage electrodes of different sizes are completely covered within the shielding range. This reduces the non-uniform electric field under high voltage and improves the stability of the standard capacitor.

[0060] Optionally, the lower end of the shielding electrode 230 is connected to the support rod 40 via an insulating support member 620, wherein the lead wires of the low-voltage electrode 220 and the shielding electrode 230 are led out from the inside of the support rod 40, and the support rod 40 is connected to the ground potential.

[0061] Specifically, refer to Figure 1 As shown, the lower end of the shielding electrode is connected to the support rod 40 via an insulating support 620. There is no metal connection between the shielding electrode and the support rod 40. The support rod is connected to ground potential independently. The leads of the low-voltage electrode and the shielding electrode are led out from inside the support rod. This ensures that the signal is effectively shielded during transmission and is not affected by environmental electromagnetic fields. At the same time, the support rod is made of stainless steel. The high hardness of stainless steel greatly reduces the impact of eccentricity on the low-voltage electrode.

[0062] Optionally, it also includes an electrode core 70, wherein a lead-out hole 510 is provided on the lower flange 50, one end of the electrode core 70 is connected to the lead-out wires of the low-voltage electrode 220 and the shielding electrode 230, and the electrode core 70 passes through the insulating lead-out bushing 630 and is led out from the lead-out hole 510 in conjunction with the sealing ring.

[0063] Specifically, refer to Figure 1 As shown, the support rod is fixed on the lower flange, which is provided with lead-out holes. The lead-out wires of the low-voltage electrode and the shielded electrode are connected to the electrode core. The electrode core passes through the insulating lead-out bushing and is led out from the lower flange with the help of the sealing ring. This ensures the airtightness of the entire device while ensuring non-metallic contact between the lead-out wire and the lower flange.

[0064] Optionally, the electrode core 70 corresponding to the low-voltage electrode 220 is connected to the first end of the low-voltage arm 320, the end of the low-voltage arm 320 is connected to the first output port 311 and the second output port 312 of the low-voltage arm external box 310, and the electrode core 70 corresponding to the shielding electrode 230 is connected to the third output port 313 of the low-voltage arm external box 310.

[0065] Specifically, refer to Figure 1 As shown, the low-voltage arm external box is fixed at the lower end of the lower flange, the low-voltage arm is placed in the low-voltage arm external box, the electrode core corresponding to the low-voltage electrode is connected to the first end of the low-voltage arm, the end of the low-voltage arm is connected to the external box, and the electrode core corresponding to the shield electrode is grounded to the third output port through a lead wire and directly led out to the outside.

[0066] Optionally, the insulating outer cylinder 10 is filled with sulfur hexafluoride gas. The medium inside the voltage divider is SF6 gas, so the capacitance does not change with the amplitude and frequency of the applied voltage.

[0067] Example 2

[0068] Combination Figure 2 This embodiment describes a method for wide-range voltage measurement using the standard capacitive voltage divider of the present invention, including:

[0069] Step S201: Connect the wide dynamic range voltage signal source to be measured to the high voltage electrode 210 of the standard capacitor divider via a wire.

[0070] Optionally, the operation of connecting the wide dynamic range voltage signal source to be measured to the high voltage electrode 210 of the standard capacitive voltage divider via a wire includes: connecting the wide dynamic range voltage signal source to be measured to a damping resistor via a wire, and connecting the other end of the damping resistor to the high voltage electrode 210 of the standard capacitive voltage divider.

[0071] Specifically, Figure 3 A schematic diagram of voltage measurement is shown for reference. Figure 2 and Figure 3 As shown, a wire is run from the wide dynamic range voltage signal source to be measured and connected to a damping resistor. The damping resistor is used to reduce the oscillation caused by the high-voltage lead. The other end of the damping resistor is connected to the high-voltage electrode of a standard capacitive voltage divider. Furthermore, the user can choose whether or not to use the damping resistor, meaning the wide dynamic range signal source can be directly connected to the standard capacitive voltage divider.

[0072] S202: Connect the standard capacitive voltage divider to the measurement circuit, which is used to receive the measurement voltage signal from the standard capacitive voltage divider.

[0073] Optionally, refer to Figure 3As shown, it also includes connecting the lead of the shielding electrode 230 of the standard capacitive voltage divider to the shielding potential. Connecting the lead of the shielding electrode of the standard capacitive voltage divider to the shielding potential creates a shielding effect inside the standard capacitive voltage divider.

[0074] Optionally, the operation of connecting the standard capacitive voltage divider to the measurement circuit includes: connecting the first output port 311 and the third output port 313 of the standard capacitive voltage divider to ground, and connecting the second output port 312 of the standard capacitive voltage divider to the data acquisition unit of the measurement circuit via a cable.

[0075] Optionally, the operation of connecting the standard capacitive voltage divider to the measurement circuit further includes: connecting the second output port 311 and the third output port 313 of the standard capacitive voltage divider to ground, and connecting the first output port 312 of the standard capacitive voltage divider to the data acquisition unit of the measurement circuit via a cable.

[0076] Specifically, the third output port is connected to ground, ensuring the casing is grounded. Depending on the required voltage division ratio, the corresponding low-voltage electrode output port (first output port and second output port) is selected, and the other low-voltage electrode output port is grounded. Thus, by switching the grounding of the first and second output ports, different voltage division ratios can be switched, allowing for the measurement of different voltage values.

[0077] In addition, according to Figure 3 A measurement system is constructed, comprising a wide dynamic range (WVR) signal source, a standard capacitive voltage divider, and a measurement circuit. The WVR voltage signal source generates a voltage signal, which can be a power grid transmission line with a high proportion of renewable energy integration, or a harmonic power source and a superimposed signal power source. The voltage signal is transmitted to the high-voltage electrode of the standard capacitive voltage divider via a high-voltage lead. The output port of a 20pF high-voltage capacitor is connected to the input port of the acquisition unit in the measurement circuit via a cable. The acquisition unit is connected to the measurement software in the measurement circuit on a computer via a data cable. The WVR voltage waveform is displayed by the calculation software on the computer.

[0078] S203: The measurement circuit amplifies the measured voltage signal to its initial value according to the preset voltage division ratio of the standard capacitor voltage divider, and determines the voltage waveform of the wide dynamic range voltage signal to be measured.

[0079] Optionally, the measurement circuit amplifies the measured voltage signal to its initial value according to the preset voltage division ratio of the standard capacitor voltage divider, and determines the voltage waveform of the wide dynamic range voltage signal to be measured, including:

[0080] The measurement software of the measurement circuit receives the measurement voltage signal from the data acquisition unit and amplifies the measurement voltage signal to the initial value according to the preset voltage division ratio to determine the voltage waveform of the wide range voltage signal to be measured.

[0081] Specifically, the output port of the corresponding low-voltage electrode is connected to the measurement circuit via a cable. The measurement circuit includes a high-speed data acquisition device (including an acquisition unit) and supporting measurement software. The measurement software amplifies the signal to the initial value according to a preset voltage division ratio. The original voltage waveform presented on the standard capacitive voltage divider is then read.

[0082] Therefore, this invention enables accurate measurement of wide dynamic voltage, filling the gap in current wide dynamic voltage measurement devices and methods for applications with high proportions of renewable energy access. The measurement method provided by this invention utilizes a standard capacitive voltage divider and conventional laboratory measurement equipment to effectively and accurately measure wide dynamic voltage signals under two different voltage division ratio parameters.

[0083] Therefore, this invention discloses a capacitive voltage divider for measuring wide dynamic range voltage signals and its usage method. The specific method is as follows: First, a coaxial voltage divider with dual voltage divider ratio capacitors is proposed. The low-voltage arm is externally mounted, and the low-voltage electrode and measurement leads are fully shielded, enabling accurate measurement of wide dynamic range voltage signals. Second, based on the required voltage division ratio, the output port corresponding to the working electrode is selected, and the output port of the other low-voltage arm is grounded, while the output port of the shielded electrode is connected to the shielded electrode. Further, after setting parameters such as the voltage division ratio and sampling rate on the measuring instrument, a wide dynamic range voltage signal source generates a wide dynamic range voltage signal, and the voltage waveform displayed on the measuring instrument is read. Further, if it is necessary to change the working electrode of the capacitive voltage divider, the output port of the low-voltage arm is switched. The output port of the used low-voltage arm is grounded, and the output port of the other low-voltage arm is connected to the measurement cable, allowing measurement of wide dynamic range voltage waveform signals at different voltage division ratios.

[0084] Example 3

[0085] Figure 4 This is the structure of an electronic device provided in an exemplary embodiment of the present invention. The electronic device 400 includes one or more processors 401 and a memory 402.

[0086] The processor 401 may be a central processing unit (CPU) or other form of processing unit with data processing and / or instruction execution capabilities, and may control other components in the electronic device to perform desired functions.

[0087] The memory 402 may include one or more computer program products, which may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 401 may execute the program instructions to implement the measurement steps of the measurement loop in the wide-range voltage measurement method using the standard capacitive voltage divider described in Embodiment 2 of the present invention above. In one example, the electronic device may also include an input device 403 and an output device 404, which are interconnected via a bus system and / or other forms of connection mechanisms (not shown).

[0088] In addition, the input device 403 may also include, for example, a keyboard, a mouse, etc.

[0089] The output device 404 can output various information to the outside. The output device 404 may include, for example, a display, a speaker, a printer, and a communication network and its connected remote output devices, etc.

[0090] Of course, for the sake of simplicity, Figure 4 Only some of the components of the electronic device relevant to the present invention are shown, omitting components such as buses, input / output interfaces, etc. In addition, the electronic device may include any other suitable components depending on the specific application.

[0091] Example 4

[0092] Exemplary computer program products and computer-readable storage media

[0093] In addition to the methods and devices described above, embodiments of the present invention may also be computer program products, which include computer program instructions that, when executed by a processor, cause the processor to perform the measurement steps of the measurement circuit in the wide-range voltage measurement method using the standard capacitive voltage divider of the present invention described in Part 2 of the above-described embodiment.

[0094] The computer program product can be written in any combination of one or more programming languages ​​to perform the operations of the embodiments of the present invention. The programming languages ​​include object-oriented programming languages ​​such as Java and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computing device, partially on the user's computing device, as a standalone software package, partially on the user's computing device and partially on a remote computing device, or entirely on a remote computing device or server.

[0095] Furthermore, embodiments of the present invention may also be computer-readable storage media storing computer program instructions thereon, which, when executed by a processor, cause the processor to perform the steps of the methods for information mining of historical change records according to various embodiments of the present invention as described in the "Exemplary Methods" section above.

[0096] The computer-readable storage medium may be any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: an electrical connection having one or more wires, a portable disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof.

[0097] The basic principles of the present invention have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in the present invention are merely examples and not limitations, and should not be considered as essential features of each embodiment of the present invention. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the present invention to the necessity of employing the aforementioned specific details.

[0098] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For system embodiments, since they largely correspond to method embodiments, the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0099] The block diagrams of devices, systems, devices, and systems involved in this invention are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, systems, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0100] The methods and systems of the present invention may be implemented in many ways. For example, they may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order of steps for the methods is for illustrative purposes only, and the steps of the methods of the present invention are not limited to the order specifically described above unless otherwise specifically stated. Furthermore, in some embodiments, the present invention may also be implemented as a program recorded on a recording medium, the program comprising machine-readable instructions for implementing the methods according to the present invention. Thus, the present invention also covers recording media storing programs for performing the methods according to the present invention.

[0101] It should also be noted that in the systems, apparatus, and methods of the present invention, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered equivalents of the present invention. The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the invention. Therefore, the invention is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features disclosed herein.

[0102] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the invention to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations therein.

Claims

1. A standard capacitance voltage divider for measuring a wide range of voltages, characterized in that, The application relates to a high-voltage capacitor, which comprises an insulating outer cylinder (10), an electrode module (20) arranged at the upper end inside the insulating outer cylinder (10), a low-voltage arm module (30) arranged at the bottom outside of the insulating outer cylinder (10) and an electrode core (70), wherein the electrode module (20) comprises a high-voltage electrode (210), two low-voltage electrodes (220) with different lengths and a shielding electrode (230), the high-voltage electrode (210), the low-voltage electrodes (220) and the shielding electrode (230) are coaxially combined, the lower end of the shielding electrode (230) is connected with a lower flange (50) arranged at the bottom of the insulating outer cylinder (10) through a support rod (40); the low-voltage arm module (30) comprises a low-voltage arm external box (310) and a low-voltage arm (320), the low-voltage arm external box (310) is fixed at the lower end of the lower flange (50), and the low-voltage arm (320) is arranged in the low-voltage arm external box (310); the radius of the high-voltage electrode (210) is larger than the radius of the low-voltage electrodes (220) and the shielding electrode (230), the low-voltage electrodes (220) and the shielding electrode (230) are coaxially arranged, the high-voltage electrode (210) and the two low-voltage electrodes (220) with different lengths form two coaxial capacitors; the shielding electrode (230) is connected with the low-voltage electrodes (220) through an upper-middle-lower three-section type, the shielding electrode (230) and the low-voltage electrodes (220) are connected through an electrode insulating plate (610), the projection area of the shielding electrode (230) covers the projection area of the low-voltage electrodes (220), the lower end of the shielding electrode (230) is connected with the support rod (40) through an insulating support (620), the lead-out wires of the low-voltage electrodes (220) and the shielding electrode (230) are led out from the inside of the support rod (40), and the support rod (40) is connected with the ground potential; a lead-out hole (510) is arranged on the lower flange (50), one end of the electrode core (70) is connected with the lead-out wires of the low-voltage electrodes (220) and the shielding electrode (230), and the electrode core (70) passes through an insulating lead-out bushing (630) and cooperates with a sealing ring to be led out from the lead-out hole (510). the electrode core (70) corresponding to the low-voltage electrodes (220) is connected with the first end of the low-voltage arm (320), the last end of the low-voltage arm (320) is connected with the first output port (311) and the second output port (312) of the low-voltage arm external box (310), and the electrode core (70) corresponding to the shielding electrode (230) is connected with the third output port (313) of the low-voltage arm external box (310).

2. The standard capacitance divider of claim 1, wherein, sulfur hexafluoride gas is arranged in the insulating outer cylinder (10).

3. The standard capacitance divider of claim 1, wherein, The application further relates to a method for measuring a wide dynamic voltage signal source, which comprises the following steps:

4. A method for wide range voltage measurement using any one of the standard capacitance voltage dividers of claims 1-3, characterized in that, connecting the wide dynamic voltage signal source to be measured with the high-voltage electrode (210) of a standard capacitor divider through a wire; ​ The standard capacitance voltage divider is connected with a measurement circuit, and the measurement circuit is used for receiving a measurement voltage signal from the standard capacitance voltage divider; The measurement circuit amplifies the measurement voltage signal to an initial value according to a preset voltage division ratio of the standard capacitance voltage divider, and determines a voltage waveform of the wide dynamic voltage signal to be measured.

5. The method of claim 4, wherein, The operation of connecting the wide dynamic voltage signal source to be measured to the high-voltage electrode (210) of the standard capacitance voltage divider through a wire includes: The wide dynamic voltage signal source to be measured is connected to a damping resistor through a wire, and the other end of the damping resistor is connected to the high-voltage electrode (210) of the standard capacitance voltage divider.

6. The method of claim 4, wherein, Further comprising: The lead-out wire of the shielding electrode (230) of the standard capacitance voltage divider is connected to a shielding potential.

7. The method of claim 4, wherein, The operation of connecting the standard capacitance voltage divider with the measurement circuit includes: The first output port (311) and the third output port (313) of the standard capacitance voltage divider are connected with the ground, and the second output port (312) of the standard capacitance voltage divider is connected with a data acquisition unit of the measurement circuit through a cable.

8. The method of claim 4, wherein, The operation of connecting the standard capacitance voltage divider with the measurement circuit further includes: The first output port (311) and the third output port (313) of the standard capacitance voltage divider are connected with the ground, and the second output port (312) of the standard capacitance voltage divider is connected with a data acquisition unit of the measurement circuit through a cable.

9. The method of any of claims 7 or 8, wherein, The operation of the measurement circuit amplifying the measurement voltage signal to an initial value according to a preset voltage division ratio of the standard capacitance voltage divider, and determining a voltage waveform of the wide dynamic voltage signal to be measured includes: The measurement software of the measurement circuit receives the measurement voltage signal from the data acquisition unit, and amplifies the measurement voltage signal to the initial value according to the preset voltage division ratio, to determine the voltage waveform of the wide dynamic voltage signal to be measured.

10. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, and the computer program is used to execute the measurement method of the measurement circuit in any one of claims 4-9.

11. An electronic device, comprising: The electronic device includes: a processor; a memory for storing executable instructions of the processor; The processor is used to read the executable instructions from the memory and execute the instructions to implement the measurement method of the measurement circuit in any one of claims 4-9.

Images