Method for switching voltage regulator gears, control device, compensating transformer and medium

Abstract

The present invention provides a method for switching gears of a voltage regulator, a control device, a compensation transformer and a medium. First, when the voltage regulator needs to switch to a target gear, the current control unit is controlled to switch from the first state to the second state; wherein, the current of the compensation unit when the current control unit is in the first state is greater than the current of the compensation unit when the current control unit is in the second state; then, all the compensation thyristors are controlled to conduct, so as to short-circuit the primary winding of the compensation transformer; then, according to the on / off combination corresponding to the target gear, the conduction states of the plurality of compensation thyristors are controlled; finally, the current control unit is controlled to operate in the first state. By short-circuiting each primary winding of the compensation transformer before gear switching, the secondary winding cannot generate induced electromotive force in each primary winding, thereby avoiding the generation of floating coupling high voltage in the primary winding during the gear switching process.

Description

Technical Field

[0001] The present invention belongs to the technical field of circuit control, and particularly relates to a method for switching gears of a voltage regulator, a control device, a compensation transformer and a medium. Background Art

[0002] A compensation transformer is a device that can provide a compensation voltage to the devices or power systems connected thereto, thereby achieving the purpose of voltage regulation and stabilization. The principle of the compensation transformer is to automatically control the switching of different winding coils of its primary winding according to the level of the input voltage, and then use the turns ratio relationship between the primary side working winding and the secondary winding, or by adjusting the voltage applied to the primary winding, to provide bidirectional multi-stage voltage compensation.

[0003] In the prior art, when the compensation transformer switches between different gears, it usually directly turns on the thyristors corresponding to the gear to be switched after turning off some thyristors. However, during the process of turning off some thyristors, due to the electromagnetic induction between the secondary winding and the primary winding, a floating coupling high voltage is likely to be generated on the primary winding, which is likely to cause faults in the compensation transformer. Summary of the Invention

[0004] In view of this, the present invention provides a method for switching gears of a voltage regulator, a control device, a compensation transformer and a medium, aiming to solve the problem of generating a floating coupling high voltage on the primary winding during gear switching in the prior art.

[0005] The first aspect of the embodiment of the present invention provides a method for switching gears of a voltage regulator. The voltage regulator includes a compensation unit, a compensation transformer and a current control unit; the compensation unit includes a plurality of compensation thyristors; the primary winding of the compensation transformer is connected to the compensation unit, and the plurality of compensation thyristors form a plurality of compensation circuits with the primary winding of the compensation transformer through different on / off combinations; the plurality of compensation circuits are used to make the compensation transformer generate a plurality of compensation voltages at different gears; each gear corresponds to an on / off combination;

[0006] The current control unit is connected to the compensation unit; the current control unit is used to adjust the current passing through the compensation unit;

[0007] The method for switching gears of the voltage regulator includes:

[0008] When the voltage regulator needs to switch to the target gear, controlling the current control unit to switch from the first state to the second state; wherein, the current of the compensation unit when the current control unit is in the first state is greater than the current of the compensation unit when the current control unit is in the second state;

[0009] Controlling all the compensation thyristors to conduct to short-circuit the primary winding of the compensation transformer;

[0010] Control the conduction states of multiple compensation thyristors according to the conduction / turn-off combinations corresponding to the target gear positions;

[0011] Control the current control unit to operate in the first state.

[0012] A second aspect of the embodiments of the present invention provides a gear shifting device for a voltage regulator. The voltage regulator includes a compensation unit, a compensation transformer, and a current control unit; the compensation unit includes multiple compensation thyristors; the primary winding of the compensation transformer is connected to the compensation unit, and multiple compensation thyristors form multiple compensation circuits with the primary winding of the compensation transformer through different conduction / turn-off combinations; the multiple compensation circuits are used to cause the compensation transformer to generate multiple compensation voltages at different gear positions; each gear position corresponds to a conduction / turn-off combination;

[0013] The current control unit is connected to the compensation unit; the current control unit is used to adjust the current passing through the compensation unit;

[0014] The gear shifting device of the voltage regulator includes:

[0015] A first switching module, configured to control the current control unit to switch from the first state to the second state when the voltage regulator needs to switch to the target gear position; wherein, the current of the compensation unit when the current control unit is in the first state is greater than the current of the compensation unit when the current control unit is in the second state;

[0016] A winding short-circuit module, configured to control all the multiple compensation thyristors to conduct, so as to short-circuit the primary winding of the compensation transformer;

[0017] A compensation control module, configured to control the conduction states of the multiple compensation thyristors according to the conduction / turn-off combinations corresponding to the target gear positions;

[0018] A second switching module, configured to control the current control unit to operate in the first state.

[0019] A third aspect of the embodiments of the present invention provides a control device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the gear shifting method of the voltage regulator in the first aspect above are implemented.

[0020] A fourth aspect of the embodiments of the present invention provides a voltage regulator, a compensation unit, a compensation transformer, a current control unit, and the control device in the third aspect above;

[0021] The compensation unit includes a plurality of compensation thyristors; the control device is connected to the plurality of compensation thyristors and the current control unit; the primary winding of the compensation transformer is connected to the compensation unit, and the plurality of compensation thyristors form a plurality of compensation circuits with the primary winding of the compensation transformer through different conduction / turn-off combinations; the plurality of compensation circuits are used to enable the compensation transformer to generate compensation voltages at multiple different levels; each level corresponds to a conduction / turn-off combination;

[0022] The current control unit is connected to the compensation unit; the current control unit is used to adjust the current passing through the compensation unit.

[0023] A fifth aspect of the embodiments of the present invention provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps of the voltage regulator's gear switching method in the first aspect above are implemented.

[0024] For the voltage regulator's gear switching method, control device, compensation transformer and medium provided by the embodiments of the present invention, first, when the voltage regulator needs to switch to the target gear, control the current control unit to switch from the first state to the second state; wherein, the current of the compensation unit when the current control unit is in the first state is greater than the current of the compensation unit when the current control unit is in the second state; then control all the compensation thyristors to conduct to short-circuit the primary winding of the compensation transformer; then, according to the conduction / turn-off combination corresponding to the target gear, control the conduction states of the plurality of compensation thyristors; finally, control the current control unit to operate in the first state. By short-circuiting each primary winding of the compensation transformer before gear switching, the secondary winding cannot generate induced electromotive force in each primary winding, thus avoiding the generation of floating coupling high voltage in the primary winding during gear switching. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 is a schematic circuit structure diagram of the voltage regulator provided by the embodiments of the present invention;

[0027] Figure 2 is an implementation flowchart of the voltage regulator's gear switching method provided by the embodiments of the present invention;

[0028] Figure 3 is a timing diagram of the voltage regulator's input control provided by the embodiments of the present invention;

[0029] Figure 4It is a schematic structural diagram of the gear shifting device of the voltage regulator provided by an embodiment of the present invention;

[0030] Figure 5 It is a schematic structural diagram of the control device provided by an embodiment of the present invention. Detailed implementation manners

[0031] In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are presented to thoroughly understand the embodiments of the present invention. However, those skilled in the art should clearly understand that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present invention.

[0032] Figure 1 It is a schematic circuit diagram of the voltage regulator provided by an embodiment of the present invention. Figure 1 The structure of the compensation transformer shown in [the figure] is only an example of the present invention and is not used as a limitation. As Figure 1 shown, in some embodiments, the voltage regulator includes a compensation unit 11, a compensation transformer 12, a current control unit (i.e., SCR11) 13, and a control device 14;

[0033] The compensation unit 11 includes a plurality of compensation thyristors (i.e., SCR1 - SCR10); the control device 14 is connected to the plurality of compensation thyristors and the current control unit 13; the primary winding of the compensation transformer 12 is connected to the compensation unit 11, and the plurality of compensation thyristors form a plurality of compensation circuits with the primary winding of the compensation transformer 12 through different on / off combinations; the plurality of compensation circuits are used to make the compensation transformer 12 generate compensation voltages of multiple different gears; each gear corresponds to an on / off combination;

[0034] The current control unit 13 is connected to the compensation unit 11; the current control unit 13 is used to adjust the current passing through the compensation unit 11.

[0035] As Figure 4 shown, T2 and T3 are the compensation transformer 12. In addition to SCR11, the current control unit 13 can also be provided with a protective circuit breaker and a soft start resistor. The protective circuit breaker is respectively connected in series with SCR11 and the soft start resistor 12; SCR11 is connected in parallel with the soft start resistor 12.

[0036] Among them, for Figure 1 the compensation unit 11 shown in [the figure], the combination of SCR1 - SCR10 and the corresponding gear of the compensation transformer 12 are shown in Table 1.

[0037] Table 1

[0038]

[0039] Among them, the control device 16 has a total of 16 control bits Bit0-Bit15, Bit0-19 correspond to SCR1-SCR10 respectively, and the variable values corresponding to each gear position of 6 control bits are reserved for internal query of the program.

[0040] In the prior art, when the voltage regulator of the above structure is switched, the thyristor that is currently turned on and does not need to be turned on for the target gear is often turned off first, and then the thyristor that needs to be turned on for the target gear and is not currently turned on is turned on. In the process of gear switching using this method, when switching between two gears, the primary winding of a certain circuit may be suspended, causing the secondary winding to generate an induced electromotive force in each primary winding, resulting in suspended coupling high voltage.

[0041] In the face of the above problems, the inventor first proposed process solution 1, that is, directly connecting a loop with a controllable switch in parallel to each primary winding of the compensation transformer, closing the controllable switch when the gear is switched, thereby short-circuiting the primary winding, and closing the controllable switch after completing the conduction control of the corresponding SCR to release the short circuit of the compensation transformer. However, this method requires adding multiple controllable switches, which will increase the cost of the voltage stabilizer, and the control device of the voltage stabilizer also needs to set control positions for multiple controllable switches respectively, which makes the control complicated.

[0042] In order to solve the problem of the above-mentioned process solution 1 and reduce the cost, the inventor further proposed process solution 2, that is, using the existing SCR in the compensation unit to short-circuit the primary winding of the compensation transformer. Considering that the compensation transformer can be short-circuited by turning on only part of the SCR, for example, for T2, the compensation thyristors can be divided into multiple groups, and any group of compensation thyristors can achieve the short circuit of T2. Any group of compensation thyristors is a combination of any two thyristors on one side of T2 (for T2, part of the winding forms a closed loop to short-circuit the entire winding), for example, SCR1 and SCR3 on the left.

[0043] For example, when it is necessary to switch to gear position 1, the following steps can be performed:

[0044] The first step is to turn off SCR11.

[0045] The second step is to turn on SCR1 and SCR3, as well as SCR7 and SCR9 to short-circuit the primary windings of T2 and T3, and turn on SCR2 and SCR8.

[0046] In the third step, SCR1 and SCR7 are then turned off.

[0047] The fourth step is to activate SCR11.

[0048] For example, when it is necessary to switch to gear position 1, the following steps may be performed:

[0049] In the first step, turn off SCR11.

[0050] In the second step, turn on SCR1 and SCR3, as well as SCR7 and SCR9 to short-circuit the primary windings of T2 and T3, and turn on SCR2 and SCR8.

[0051] In the third step, then turn on SCR2 and SCR8, and turn off SCR1 and SCR7.

[0052] In the fourth step, turn on SCR11.

[0053] In the above method proposed by the present invention, the short-circuit of the primary winding can be achieved without adding a new circuit, effectively reducing the cost. However, this method requires the control device to classify the compensation thyristors, and since the control timings of the thyristors are different, the control process needs to identify the compensation thyristors, so as to perform different controls on each thyristor, and the control process is relatively complex.

[0054] Therefore, the inventor further improved the above process solution two to obtain Figure 2 the tap-changing method of the voltage regulator shown in Figure 2 is the implementation flowchart of the tap-changing method of the voltage regulator provided by the embodiment of the present invention. As Figure 2 shown, in some embodiments, the tap-changing method of the voltage regulator includes:

[0055] S210, when the voltage regulator needs to switch to the target tap, control the current control unit to switch from the first state to the second state; wherein, the current of the compensation unit when the current control unit is in the first state is greater than the current of the compensation unit when the current control unit is in the second state.

[0056] When the tap of the compensation transformer is switched, for example, the switch between the 15 taps described in Table 1 above, directly switching will generate a large inrush current, affecting the operation of the compensation transformer. Therefore, it is necessary to switch the state of the current control unit to reduce the current passing through the compensation transformer, so as to avoid generating a large inrush current during the tap-changing process.

[0057] S220, control all the compensation thyristors to conduct to short-circuit the primary winding of the compensation transformer.

[0058] In the embodiment of the present invention, after all the compensation thyristors are conducted, the compensation thyristors and each primary winding form a plurality of closed loops, resulting in the short-circuit of each primary winding of the compensation transformer.

[0059] S230, according to the on / off combination corresponding to the target tap, control the conduction state of the plurality of compensation thyristors.

[0060] In the embodiments of the present invention, the compensation thyristors to be turned on for each gear of the compensation transformer are preset. When it is necessary to switch to the target gear, it is only necessary to ensure that the thyristors corresponding to the target gear are turned on. Since all the compensation thyristors have been turned on in S220, only all the compensation thyristors except those corresponding to the target gear need to be turned off in S230.

[0061] S240, control the current control unit to work in the first state.

[0062] In the embodiments of the present invention, the control device only needs to send turn-on signals to all the compensation thyristors in S220, and indicate that the thyristors corresponding to the target gear remain on and turn off other thyristors in S230. Compared with the above complex control method, the control process of the present invention is simpler after further improvement, saving control costs. In addition, using this method is equivalent to combining the short-circuit step of the compensation transformer and the step of turning on the SCRs to be turned on under the target gear, avoiding the defect that some of the SCRs used for short-circuit in Process Solution 2 cannot be fully matched with the SCRs to be turned on under the target gear, resulting in the need for conventional turn-off and turn-on operations after the short-circuit step, and effectively improving the switching speed.

[0063] In the embodiments of the present invention, when only the thyristors corresponding to the target gear are turned on, the current control unit is switched back to the first state, so that the compensation transformer works under the normal working current again. At this time, the gear of the compensation transformer is switched to the target gear, and the gear switching is completed.

[0064] In the embodiments of the present invention, before the gear switching, each primary winding of the compensation transformer is short-circuited first, so that the secondary winding cannot generate induced electromotive force in each primary winding, thereby avoiding the generation of floating coupling high voltage in the primary winding during the gear switching process.

[0065] Figure 3 is the control timing diagram of the voltage regulator input provided by the embodiments of the present invention. As Figure 3 shown, in some embodiments, S220 may include: sending high-level signals to all the compensation thyristors to turn on multiple compensation thyristors to short-circuit the primary winding of the compensation transformer.

[0066] In the embodiments of the present invention, when performing this step, it is only necessary to send high-level signals to SCR1-SCR10, and the control process is simple.

[0067] In some embodiments, S230 may include: determining the compensation thyristors to be turned off required for the target gear according to the on / off combination corresponding to the target gear; sending low-level signals to the compensation thyristors to be turned off required for the target gear.

[0068] Exemplarily, when the target gear is gear 1 in Table 1 above, this step only needs to turn off the compensation thyristors except SCR2, 3, 7, and 8.

[0069] In some embodiments, the current control unit includes a soft-start resistor and a soft-start thyristor connected in parallel. Correspondingly, S210 may include: sending a low-level signal to the soft-start thyristor to turn off the soft-start thyristor.

[0070] In the embodiment of the present invention, after the soft-start thyristor is turned off, the compensation transformer is connected to the soft-start resistor. However, due to the large resistance value of the soft-start resistor, only a very small current will exist in the compensation transformer.

[0071] In some embodiments, after S210, the method for switching the gear of the voltage regulator further includes: waiting for a preset delay time and then performing S220.

[0072] In the embodiment of the present invention, in order to ensure reliable turn-off of the thyristor, after turning off one or more thyristors of the compensation transformer each time, it is necessary to wait for a preset delay time before performing the next step. Optionally, the preset delay time is 0.5 - 50 voltage cycles.

[0073] In some embodiments, after S240, the method for switching the gear of the voltage regulator further includes: waiting for a preset delay time, detecting the output voltage of the compensation transformer at a preset phase angle, and determining the zero point of the output voltage. The zero point is used to make the output voltage of the voltage regulator in phase with the connected external device.

[0074] In the embodiment of the present invention, after the gear switching is completed, it is necessary to detect the phase of the output voltage of the compensation transformer, so as to ensure that the voltage starts to move from the voltage zero point, and make the output voltage of the compensation transformer in phase with the connected external device. Optionally, the range of the preset phase angle is 0 - 90 degrees.

[0075] In summary, the beneficial effects of the present invention are as follows:

[0076] By short-circuiting each primary winding of the compensation transformer before gear switching, the secondary winding cannot generate induced electromotive force in each primary winding, thereby avoiding the generation of floating coupling high voltage in the primary winding during the gear switching process. In addition, this solution has significant advantages in terms of device cost, control complexity, and switching speed.

[0077] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

[0078] Figure 4 is a schematic structural diagram of the gear switching device of the voltage regulator provided by the embodiment of the present invention. AsFigure 4 As shown, in some embodiments, the voltage regulator includes a compensation unit, a compensation transformer, and a current control unit; the compensation unit includes a plurality of compensation thyristors; the primary winding of the compensation transformer is connected to the compensation unit, and the plurality of compensation thyristors form a plurality of compensation circuits with the primary winding of the compensation transformer through different on / off combinations; the plurality of compensation circuits are used to cause the compensation transformer to generate compensation voltages of multiple different levels; each level corresponds to an on / off combination.

[0079] The current control unit is connected to the compensation unit; the current control unit is used to adjust the current passing through the compensation unit.

[0080] The gear shifting device 4 of the voltage regulator includes:

[0081] A first switching module 410, configured to control the current control unit to switch from a first state to a second state when the voltage regulator needs to switch to a target gear; wherein, the current of the compensation unit when the current control unit is in the first state is greater than the current of the compensation unit when the current control unit is in the second state.

[0082] A winding short-circuit module 420, configured to control all the compensation thyristors to conduct, so as to short-circuit the primary winding of the compensation transformer.

[0083] A compensation control module 430, configured to control the on states of the plurality of compensation thyristors according to the on / off combination corresponding to the target gear.

[0084] A second switching module 440, configured to control the current control unit to operate in the first state.

[0085] Optionally, the winding short-circuit module 420 is specifically configured to send a high-level signal to all the compensation thyristors to cause all the compensation thyristors to conduct, so as to short-circuit the primary winding of the compensation transformer.

[0086] Optionally, the compensation control module 430 is specifically configured to determine the compensation thyristors that need to be turned off for the target gear according to the on / off combination corresponding to the target gear; and send a low-level signal to the compensation thyristors that need to be turned off for the target gear.

[0087] Optionally, the current control unit includes a soft-start resistor and a soft-start thyristor connected in parallel. The first switching module 410 is specifically configured to: send a low-level signal to the soft-start thyristor to turn off the soft-start thyristor.

[0088] Optionally, the gear shifting device of the voltage regulator further includes: a delay module, configured to wait for a preset delay time and then execute the steps of the short-circuit module 420.

[0089] Optionally, the gear shifting device of the voltage regulator further includes: a phase-locked module, configured to detect the output voltage of the compensation transformer at a preset phase angle after waiting for a preset delay time, and determine the zero point of the output voltage, where the zero point is used to make the output voltage of the compensation transformer in the same phase as the connected external device.

[0090] Optionally, the preset delay time is 0.5 - 50 voltage cycles.

[0091] The gear shifting device of the voltage regulator provided in this embodiment can be used to execute the above method embodiment, and its implementation principle and technical effects are similar, which will not be elaborated here.

[0092] Figure 5 It is a schematic structural diagram of the control device provided by an embodiment of the present invention. As Figure 5 shown, a control device 5 provided by an embodiment of the present invention, the control device 5 of this embodiment includes: a processor 50, a memory 51, and a computer program 52 stored in the memory 51 and executable on the processor 50. When the processor 50 executes the computer program 52, the steps in the above method embodiments of the gear shifting of each voltage regulator are implemented, such as Figure 2 the steps 210 to 220 shown. Or, when the processor 50 executes the computer program 52, the functions of each module / unit in the above system embodiments are implemented, such as Figure 4 the functions of the modules 410 to 420 shown.

[0093] Exemplarily, the computer program 52 can be divided into one or more modules / units, and one or more modules / units are stored in the memory 51 and executed by the processor 50 to complete the present invention. One or more modules / units can be a series of computer program instruction segments capable of performing specific functions, and the instruction segments are used to describe the execution process of the computer program 52 in the control device 5.

[0094] The control device 5 can be an MCU, an ECU, etc., which is not limited here. The terminal may include, but is not limited to, a processor 50 and a memory 51. Those skilled in the art can understand that Figure 5 this is only an example of the control device 5, and does not constitute a limitation on the control device 5. It may include more or fewer components than shown in the figure, or combine certain components, or different components. For example, the terminal may further include input / output devices, network access devices, buses, etc.

[0095] The so-called processor 50 may be a Central Processing Unit (CPU), or may also be other general-purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field-Programmable Gate Arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0096] The memory 51 may be an internal storage unit of the control device 5, such as the hard disk or memory of the control device 5. The memory 51 may also be an external storage device of the control device 5, such as a plug-in hard disk equipped on the control device 5, a Smart Media Card (SMC), a Secure Digital (SD) card, a Flash Card, etc. Further, the memory 51 may also include both the internal storage unit of the control device 5 and the external storage device. The memory 51 is used to store computer programs and other programs and data required by the terminal. The memory 51 may also be used to temporarily store data that has been output or is to be output.

[0097] An embodiment of the present invention provides a computer-readable storage medium storing a computer program, which when executed by a processor implements the steps in the embodiment of the method for switching the gear of the above voltage regulator.

[0098] The computer-readable storage medium stores a computer program 52, and the computer program 52 includes program instructions. When the program instructions are executed by the processor 50, all or part of the processes in the methods of the above embodiments are implemented. It can also be completed by instructing the relevant hardware through the computer program 52. The computer program 52 can be stored in a computer-readable storage medium. When the computer program 52 is executed by the processor 50, the steps of the above various method embodiments can be implemented. Among them, the computer program 52 includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disc, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice within the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0099] The computer-readable storage medium can be the internal storage unit of the terminal in any of the foregoing embodiments, such as the hard disk or memory of the terminal. The computer-readable storage medium can also be an external storage device of the terminal, such as a plug-in hard disk equipped on the terminal, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. Further, the computer-readable storage medium can also include both the internal storage unit and the external storage device of the terminal. The computer-readable storage medium is used to store the computer program and other programs and data required by the terminal. The computer-readable storage medium can also be used to temporarily store the data that has been output or will be output.

[0100] It should be understood that the magnitudes of the sequence numbers of the steps in the above embodiments do not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

[0101] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiments can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of this application. The specific working processes of the units and modules in the above system can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated here.

[0102] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not described in detail or recorded in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0103] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of the present invention.

[0104] In the embodiments provided by the present invention, it should be understood that the disclosed device / terminal and method can be implemented in other ways. For example, the device / terminal embodiments described above are merely illustrative. For example, the division of modules or units is only a logical functional division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in an electrical, mechanical or other form.

[0105] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0106] In addition, in each embodiment of the present invention, each functional unit can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0107] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, to implement all or part of the processes in the above method embodiments of the present invention, it can also be completed by instructing relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium, etc. It should be noted that the content included in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0108] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A method for switching gears of a voltage regulator, characterized in that, The voltage regulator includes a compensation unit, a compensation transformer, and a current control unit; the compensation unit includes a plurality of compensation thyristors; the primary winding of the compensation transformer is connected to the compensation unit, and the plurality of compensation thyristors form a plurality of compensation circuits with the primary winding of the compensation transformer through different conduction / turn-off combinations; the plurality of compensation circuits are used to cause the compensation transformer to generate compensation voltages of multiple different gears; each gear corresponds to a conduction / turn-off combination; The current control unit is connected to the compensation unit; The current control unit is used to adjust the current passing through the compensation unit; The gear switching method of the voltage regulator includes: When the voltage regulator needs to switch to a target gear, controlling the current control unit to switch from a first state to a second state; wherein, the current of the compensation unit when the current control unit is in the first state is greater than the current of the compensation unit when the current control unit is in the second state; Controlling all the compensation thyristors to conduct to short-circuit the primary winding of the compensation transformer; According to the conduction / turn-off combination corresponding to the target gear, controlling the conduction states of the plurality of compensation thyristors; Controlling the current control unit to operate in the first state.

2. The method for switching the gear of the voltage regulator according to claim 1, characterized in that, The controlling all the compensation thyristors to conduct to short-circuit the primary winding of the compensation transformer includes: Sending a high-level signal to all the compensation thyristors to cause all the compensation thyristors to conduct and short-circuit the primary winding of the compensation transformer.

3. The method for switching the gear of the voltage regulator according to claim 2, characterized in that, According to the conduction / turn-off combination corresponding to the target gear, controlling the conduction states of the plurality of compensation thyristors includes: Determining the compensation thyristors to be turned off for the target gear according to the conduction / turn-off combination corresponding to the target gear; Sending a low-level signal to the compensation thyristors to be turned off for the target gear.

4. The method for switching the gear of the voltage regulator according to claim 1, wherein The current control unit includes a soft-start resistor and a soft-start thyristor connected in parallel; The controlling the current control unit to switch from the first state to the second state includes: Sending a low-level signal to the soft-start thyristor to turn off the soft-start thyristor.

5. The method for switching the gear of the voltage regulator according to any one of claims 1-4, characterized in that, After controlling the current control unit to switch from the first state to the second state, the method further includes: Waiting for a preset delay time and then performing the step of controlling all the compensation thyristors to conduct.

6. The method for switching the gear of the voltage regulator according to claim 5, characterized in that, After controlling the current control unit to operate in the first state, the method further includes: Waiting for a preset delay time and detecting the output voltage of the compensation transformer at a preset phase angle to determine the zero point of the output voltage, and the zero point is used to make the output voltage of the compensation transformer in phase with the external device connected to the voltage regulator.

7. The method for switching the gear of the voltage regulator according to claim 5, characterized in that The preset delay time is 0.5 - 50 voltage cycles.

8. A control device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the gear switching method of the voltage regulator according to any one of claims 1 to 7 above.

9. A voltage regulator, characterized in that, Including a compensation unit, a compensation transformer, a current control unit, and a control device according to claim 8 above; The compensation unit includes a plurality of compensation thyristors; the control device is connected to the plurality of compensation thyristors and the current control unit; the primary winding of the compensation transformer is connected to the compensation unit, and the plurality of compensation thyristors form a plurality of compensation circuits with the primary winding of the compensation transformer through different conduction / shutdown combinations; the plurality of compensation circuits are used to cause the compensation transformer to generate compensation voltages of multiple different grades; each grade corresponds to a conduction / shutdown combination; The current control unit is connected to the compensation unit; the current control unit is used to adjust the current passing through the compensation unit.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for switching the grades of the voltage regulator according to any one of claims 1 to 7 above are implemented.

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