Phase shifting method and device, medium and equipment

Abstract

The invention discloses a phase shifting method, a phase shifting device, a medium and equipment, the phase shifting device comprises three voltage regulators, the three voltage regulators can regulate two non-reference signals and output corrected phase shifting signals in combination with reference phase signals, and therefore fine tuning of signal phases is achieved. According to the phase shifting method, on the basis of the phase shifting device, by obtaining the phase deviation of a reference signal and a bus voltage signal and combining a preset phase proportion mapping function, the voltage regulating proportions of different voltage regulators are adjusted, and therefore phase correction of the voltage signal is achieved. According to the design, the requirement of expensive equipment in the traditional GIS same-frequency and same-phase technology is avoided, the process is simplified, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution network, and in particular to a phase shifting method, device, medium and equipment. Background Art

[0002] During the power outage inspection and testing of Gas Insulated Substation (GIS), some operations in the power system (such as switching power supply lines, adjusting voltage, etc.) may cause changes in the load in the bus, which will further cause an offset between the phase of the bus voltage signal and the phase of the test three-phase voltage signal.

[0003] In order to deal with this situation, the commonly used technology is GIS same frequency and same phase AC withstand voltage technology. However, this technology requires expensive same frequency and same phase power supply equipment, excitation transformer, resonance device and other equipment, and has problems such as high cost, complex process and cumbersome operation. Summary of the invention

[0004] Based on this, it is necessary to provide a phase shifting method, device, medium and equipment to solve the problems of high cost, complicated process and cumbersome operation in the existing GIS same-frequency and same-phase AC withstand voltage technology.

[0005] A phase shifting device, the phase shifting device uses a test three-phase voltage signal as a signal source, the test three-phase voltage signal includes a reference phase signal, a first non-reference phase signal and a second non-reference phase signal, and the phase shifting device includes a first voltage regulator, a second voltage regulator and a third voltage regulator;

[0006] The input end of the second voltage regulator is connected to the first non-reference phase signal, the ground end of the second voltage regulator is grounded, and the voltage regulation output end of the second voltage regulator is connected to the input end of the first voltage regulator;

[0007] The input end of the third voltage regulator is connected to the second non-reference phase signal, the ground end of the third voltage regulator is grounded, and the voltage regulation output end of the third voltage regulator is connected to the input end of the first voltage regulator;

[0008] The negative electrode of the output end of the first voltage regulator is connected to the reference phase signal before phase shifting, and the positive electrode of the output end of the first voltage regulator outputs the corrected phase shifted signal.

[0009] A phase shifting method, applied to the above phase shifting device, comprises:

[0010] Obtaining a phase deviation between the reference phase signal and the bus voltage signal;

[0011] In combination with a preset phase ratio mapping function, determining a first voltage regulation ratio of the first voltage regulator, a second voltage regulation ratio of the second voltage regulator, and a third voltage regulation ratio of the third voltage regulator according to the phase deviation;

[0012] The first voltage regulator is adjusted to the first voltage regulation ratio, the second voltage regulator is adjusted to the second voltage regulation ratio, and the third voltage regulator is adjusted to the third voltage regulation ratio.

[0013] In one embodiment, the preset phase ratio mapping function is expressed as:

[0014]

[0015] In the above formula, β represents the phase deviation; K 1 Indicates the first voltage regulation ratio; K 1 Indicates the second voltage regulation ratio; K 3 represents the third voltage regulation ratio.

[0016] In one embodiment, determining a first voltage regulation ratio of the first voltage regulator, a second voltage regulation ratio of the second voltage regulator, and a third voltage regulation ratio of the third voltage regulator according to the phase deviation includes:

[0017] The first voltage regulation ratio is set to 1, and the second voltage regulation ratio is set to be the same as the third voltage regulation ratio, and the first voltage regulation ratio, the second voltage regulation ratio and the third voltage regulation ratio are solved according to the phase ratio mapping function.

[0018] A computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the processor executes the steps of the above-mentioned phase shifting method.

[0019] A terminal device, characterized in that it comprises a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the above-mentioned phase shifting method.

[0020] The present invention provides a phase shifting method, device, medium and equipment, wherein the phase shifting device includes three voltage regulators, which can adjust two non-reference signals and output a corrected phase shifted signal in combination with a reference phase signal, thereby achieving fine adjustment of the signal phase. The phase shifting method obtains the phase deviation between the reference signal and the bus voltage signal on the basis of the phase shifting device, and adjusts the voltage regulation ratio of different voltage regulators in combination with a preset phase ratio mapping function, thereby achieving phase correction of the voltage signal. This design avoids the need for expensive equipment in the traditional GIS co-frequency and co-phase technology, simplifies the process and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] in:

[0023] Figure 1 is a schematic structural diagram of a phase shifting device in one embodiment;

[0024] Figure 2 is a schematic flow chart of a phase shifting method in one embodiment;

[0025] Figure 3 It is a schematic diagram of the possible range of the phase shift signal under the premise of setting the first voltage regulation ratio to 1 and setting the second voltage regulation ratio to be the same as the third voltage regulation ratio;

[0026] Figure 4 This is a structural block diagram of the terminal equipment. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0029] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] like Figure 1 As shown, Figure 1 The diagram is a schematic diagram of the structure of a phase shift device in an embodiment. In this embodiment, the phase shift device uses a test three-phase voltage signal as a signal source. The test three-phase voltage signal includes a reference phase signal, a first non-reference phase signal, and a second non-reference phase signal. Among them, the reference phase signal refers to the reference signal in the test three-phase voltage signal, and the phase shift device adjusts the output phase shift signal relative to it. The non-reference signal refers to the remaining two signals relative to the reference phase signal. Of course, the reference phase signal defined here can be set according to needs, for example, in Figure 1 In the above, when the A phase signal is used as the reference phase signal, the B phase signal and the C phase signal are the first non-reference phase signal and the second non-reference phase signal; similarly, when the B phase signal is used as the reference phase signal, the A phase signal and the C phase signal are the first non-reference phase signal and the second non-reference phase signal; when the C phase signal is used as the reference phase signal, the B phase signal and the C phase signal are the first non-reference phase signal and the second non-reference phase signal.

[0031] The phase shifting device includes a first voltage regulator T1, a second voltage regulator T2 and a third voltage regulator T3, which respectively superimpose input signals according to different voltage regulation ratios to achieve phase shift adjustment. The specific adjustment principle will be described in detail later.

[0032] The input end of the second voltage regulator is connected to the first non-reference phase signal, the ground end of the second voltage regulator is grounded, and the voltage regulation output end of the second voltage regulator is connected to the input end of the first voltage regulator; this means that the second voltage regulator changes the phase of the first non-reference phase signal by adjusting the voltage thereof. The voltage-regulated signal is transmitted to the input end of the first voltage regulator through the output end of the second voltage regulator.

[0033] The input end of the third voltage regulator is connected to the second non-reference phase signal, the ground end of the third voltage regulator is grounded, and the voltage regulation output end of the third voltage regulator is connected to the input end of the first voltage regulator; similarly, the third voltage regulator changes the phase of the second non-reference phase signal by adjusting the voltage thereof. The voltage-regulated signal is transmitted to the input end of the first voltage regulator through the output end of the third voltage regulator.

[0034] The negative pole of the output terminal of the first voltage regulator is connected to the reference phase signal before phase shifting, and the positive pole of the output terminal of the first voltage regulator outputs the corrected phase shift signal. This means that the task of the first voltage regulator is to compare the signals transmitted from the second and third voltage regulators with the reference phase signal and adjust the signal phase as needed. Through comparison and adjustment, the output signal phase is corrected to the desired value.

[0035] The above phase shifting device adjusts the two non-reference signals through three voltage regulators, and outputs a corrected phase shifting signal in combination with the reference phase signal, thereby achieving fine adjustment of the signal phase. This design avoids the need for expensive equipment in traditional GIS co-frequency and co-phase technology, simplifies the process and reduces costs.

[0036] like Figure 2 As shown, Figure 2 : is a flow chart of a phase shifting method in an embodiment, which is applied to the above-mentioned phase shifting device. The steps provided by the phase shifting method in this embodiment include:

[0037] S201, obtaining a phase deviation between a reference phase signal and a bus voltage signal.

[0038] Among them, the reference phase signal is the reference signal in the test three-phase voltage, while the bus voltage signal reflects the voltage of the actual power system. The system can measure their phase difference as the basis for subsequent correction.

[0039] S202, determining a first voltage regulation ratio of the first voltage regulator, a second voltage regulation ratio of the second voltage regulator, and a third voltage regulation ratio of the third voltage regulator according to the phase deviation in combination with a preset phase ratio mapping function.

[0040] This step introduces a preset phase ratio mapping function, which is used to convert the phase deviation into the voltage regulation ratio required by each voltage regulator. Through this mapping function, the system determines the voltage regulation ratio of the first voltage regulator, the voltage regulation ratio of the second voltage regulator, and the voltage regulation ratio of the third voltage regulator, respectively, so as to accurately correct the phase of the voltage signal.

[0041] S203, adjusting the first voltage regulator to a first voltage regulation ratio, adjusting the second voltage regulator to a second voltage regulation ratio, and adjusting the third voltage regulator to a third voltage regulation ratio.

[0042] The above phase shift method obtains the phase deviation between the reference signal and the bus voltage signal, and adjusts the voltage regulation ratio of different voltage regulators in combination with a preset phase ratio mapping function, thereby achieving phase correction of the voltage signal. Compared with traditional technologies, this method is more flexible and can be adjusted automatically, reducing the complexity of manual operation.

[0043] In a specific embodiment, the preset phase ratio mapping function is expressed as:

[0044]

[0045] In the above formula, β represents the phase deviation; K 1 Indicates the first voltage regulation ratio; K 2 Indicates the second voltage regulation ratio; K 3Indicates the third voltage regulation ratio. The following verifies the phase ratio mapping function:

[0046] For example, we use the A phase signal as the reference phase signal, the B phase signal as the first non-reference phase signal, and the C phase signal as the second non-reference phase signal, then set:

[0047]

[0048] Then the output voltage of the first voltage regulator T2 is expressed as:

[0049]

[0050] The expanded form of is:

[0051]

[0052] Then the output voltage of the second voltage regulator T3 is expressed as:

[0053]

[0054] →

[0055] U 3 The expanded form of is:

[0056]

[0057] Then the input voltage of the voltage regulator T1 is expressed as:

[0058]

[0059] Substitution The expanded form of is:

[0060]

[0061] After combining similar terms, it is expressed as:

[0062]

[0063] The output voltage U1 of the first voltage regulator T1 is expressed as:

[0064]

[0065] Bring it in again The expansion and arrangement of is expressed as:

[0066]

[0067] The auxiliary angle formula is used to calculate:

[0068]

[0069] Among them, using the auxiliary angle formula, it can be seen that the phase ratio mapping function is expressed as:

[0070]

[0071] In a specific embodiment, in order to simply calculate the sizes of the first voltage regulation ratio, the second voltage regulation ratio, and the third voltage regulation ratio, in step S2, the first voltage regulation ratio of the first voltage regulator, the second voltage regulation ratio of the second voltage regulator, and the third voltage regulation ratio of the third voltage regulator are determined according to the phase deviation, including: setting the first voltage regulation ratio to 1, and setting the second voltage regulation ratio to be the same as the third voltage regulation ratio, both to K, and solving the first voltage regulation ratio, the second voltage regulation ratio, and the third voltage regulation ratio according to the phase ratio mapping function.

[0072] like Figure 3 As shown in FIG. 1 , under the premise that the first voltage regulation ratio is set to 1, and the second voltage regulation ratio is set to be the same as the third voltage regulation ratio, both of which are K, the diamond closed area is the possible range of the phase shift signal. Its voltage can be The phase can be adjusted within the range of 0 to 60° lagging behind phase A.

[0073] Furthermore, in order to quickly adjust the second voltage regulator and the third voltage regulator, we can also calculate and count the K values ​​corresponding to the conventional phase deviations, and draw a corresponding table, which is shown in Table 1 below:

[0074]

[0075] Table 1

[0076] Figure 4 FIG. 2 shows an internal structure diagram of a terminal device in an embodiment. Figure 4 As shown, the terminal device includes a processor, a memory and a network interface connected via a system bus. The memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium of the terminal device stores an operating system and may also store a computer program. When the computer program is executed by the processor, the processor may implement the phase shift method. The internal memory may also store a computer program. When the computer program is executed by the processor, the processor may implement the phase shift method. Those skilled in the art will understand that Figure 4 The structure shown in the figure is only a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the terminal device to which the scheme of the present application is applied. The specific terminal device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0077] A computer-readable storage medium stores a computer program, which implements the following steps when executed by a processor: obtaining a phase deviation between a reference phase signal and a bus voltage signal; determining a first voltage regulation ratio of a first voltage regulator, a second voltage regulation ratio of a second voltage regulator, and a third voltage regulation ratio of a third voltage regulator according to the phase deviation in combination with a preset phase ratio mapping function; adjusting the first voltage regulator to the first voltage regulation ratio, adjusting the second voltage regulator to the second voltage regulation ratio, and adjusting the third voltage regulator to the third voltage regulation ratio.

[0078] A terminal device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the following steps when executing the computer program: obtaining a phase deviation between a reference phase signal and a bus voltage signal; determining a first voltage regulation ratio of a first voltage regulator, a second voltage regulation ratio of a second voltage regulator and a third voltage regulation ratio of a third voltage regulator according to the phase deviation in combination with a preset phase ratio mapping function; adjusting the first voltage regulator to the first voltage regulation ratio, adjusting the second voltage regulator to the second voltage regulation ratio and adjusting the third voltage regulator to the third voltage regulation ratio.

[0079] It should be noted that the above-mentioned phase shifting method, device, equipment and computer-readable storage medium belong to a general inventive concept, and the contents in the embodiments of the phase shifting method, device, equipment and computer-readable storage medium are applicable to each other.

[0080] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the program can be stored in a non-volatile computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory may include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0081] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A phase shifting device, characterized in that: The phase shift device uses a test three-phase voltage signal as a signal source, the test three-phase voltage signal includes a reference phase signal, a first non-reference phase signal and a second non-reference phase signal, and the phase shift device includes a first voltage regulator, a second voltage regulator and a third voltage regulator; The input end of the second voltage regulator is connected to the first non-reference phase signal, the ground end of the second voltage regulator is grounded, and the voltage regulation output end of the second voltage regulator is connected to the input end of the first voltage regulator; The input end of the third voltage regulator is connected to the second non-reference phase signal, the ground end of the third voltage regulator is grounded, and the voltage regulation output end of the third voltage regulator is connected to the input end of the first voltage regulator; The negative electrode of the output end of the first voltage regulator is connected to the reference phase signal before phase shifting, and the positive electrode of the output end of the first voltage regulator outputs the corrected phase shifting signal.

2. A phase shifting method, characterized in that: Applied to the phase shifting device as claimed in claim 1, the method comprises: Obtaining a phase deviation between the reference phase signal and the bus voltage signal; In combination with a preset phase ratio mapping function, determining a first voltage regulation ratio of the first voltage regulator, a second voltage regulation ratio of the second voltage regulator, and a third voltage regulation ratio of the third voltage regulator according to the phase deviation; The first voltage regulator is adjusted to the first voltage regulation ratio, the second voltage regulator is adjusted to the second voltage regulation ratio, and the third voltage regulator is adjusted to the third voltage regulation ratio.

3. The method according to claim 2, characterized in that The preset phase ratio mapping function is expressed as: In the above formula, β represents the phase deviation; K1 represents the first voltage regulation ratio; K2 represents the second voltage regulation ratio; K3 represents the third voltage regulation ratio.

4. The method according to claim 3, characterized in that The determining, according to the phase deviation, a first voltage regulation ratio of the first voltage regulator, a second voltage regulation ratio of the second voltage regulator, and a third voltage regulation ratio of the third voltage regulator comprises: The first voltage regulation ratio is set to 1, and the second voltage regulation ratio is set to be the same as the third voltage regulation ratio, and the first voltage regulation ratio, the second voltage regulation ratio and the third voltage regulation ratio are solved according to the phase ratio mapping function.

5. A computer-readable storage medium, characterized in that: A computer program is stored, and when the computer program is executed by a processor, the processor is caused to perform the steps of the method according to any one of claims 2 to 4.

6. A terminal device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the method according to any one of claims 2 to 4.

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