Compensation transformer slow start input method, control device, compensation transformer and medium
By controlling the conduction angle change of the slow-start thyristor, the compensation circuit is gradually put into operation, which solves the problems of transformer damage and increased size caused by inrush current, and realizes stable operation and size optimization of the transformer.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- KEHUA DATA CO LTD
- Filing Date
- 2022-08-31
- Publication Date
- 2026-05-29
AI Technical Summary
In the existing technology, the inrush current problem at the moment of commissioning of the compensation transformer leads to transformer damage and power quality degradation. At the same time, increasing the slow-start resistance will lead to an increase in the size of the compensation transformer and an increase in power loss.
By controlling the conduction angle of the slow-start thyristor, the compensation circuit is gradually put into operation, reducing the amplitude of the inrush current and avoiding increasing the resistance of the slow-start resistor, thereby reducing the size of the compensation transformer.
It effectively reduces inrush current, avoids excessive power loss, and reduces the size of the compensation transformer and the capacity requirements of the protection circuit breaker.
Smart Images
Figure CN115441718B_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of power equipment control technology, and in particular relates to a method for slow-starting a compensation transformer, a control device, a compensation transformer, and a dielectric medium. Background Technology
[0002] At the moment a compensation transformer is switched on, an inrush current is typically generated. The maximum amplitude of this inrush current can exceed the transformer's rated current by several times or even tens of times, and its duration is relatively long, ranging from tens of power cycles to tens of seconds. This can easily damage the compensation transformer and reduce its service life. Furthermore, because the inrush current contains a large number of high-order harmonic components, it can easily degrade the quality of the transformer's output power.
[0003] Currently, the common approach to reduce inrush current is to increase the resistance value of the slow-start resistor in the compensation transformer. However, a larger slow-start resistor value results in greater power loss and requires a larger capacity for the protective circuit breaker in the compensation transformer, which in turn increases the size of the compensation transformer and affects its installation. Summary of the Invention
[0004] In view of this, the present invention provides a method for slow-starting a compensation transformer, a control device, a compensation transformer, and a dielectric medium, aiming to solve the problem that the size of the compensation transformer increases due to the existing technical means of reducing the excitation current.
[0005] The first aspect of the present invention provides a method for slow-starting the compensation transformer for a voltage regulator. The voltage regulator includes a compensation transformer, a compensation unit, and a slow-starting thyristor. The primary winding of the compensation transformer is connected to the compensation unit to form multiple compensation circuits. The slow-starting thyristor is connected to the compensation unit and is used to control the activation of the multiple compensation circuits.
[0006] Methods for slow-starting compensation transformers include:
[0007] When the target compensation circuit needs to be connected to the working circuit of the voltage regulator, the target conduction angle of the slow-start thyristor within the target voltage output cycle is determined according to the preset conduction angle change method for the target voltage output cycle of the compensation transformer.
[0008] During each target voltage output cycle, the slow-start thyristor is turned on according to the target conduction angle to complete the activation of the target compensation circuit;
[0009] The target voltage output cycle is any voltage output cycle during the process of the target compensation circuit being put into the working circuit of the voltage regulator; the preset conduction angle change method is: the target conduction angle of the slow-start thyristor in the target voltage output cycle is greater than the conduction angle in the previous voltage output cycle of the target voltage output cycle.
[0010] A second aspect of the present invention provides a compensation transformer slow-start connection device, comprising: a voltage regulator, the voltage regulator including a compensation transformer, a compensation unit and a slow-start thyristor; the primary winding of the compensation transformer is connected to the compensation unit to form multiple compensation circuits; the slow-start thyristor is connected to the compensation unit and is used to control the connection of the multiple compensation circuits.
[0011] The compensation transformer slow-start device includes:
[0012] The calculation module is used to determine the target conduction angle of the slow-start thyristor within the target voltage output cycle according to the preset conduction angle change method when the target compensation circuit needs to be connected to the working circuit of the voltage regulator.
[0013] The turn-on module is used to control the turn-on of the slow-start thyristor according to the target turn-on angle during each target voltage output cycle, so as to complete the activation of the target compensation circuit.
[0014] The target voltage output cycle is any voltage output cycle during the process of the target compensation circuit being put into the working circuit of the voltage regulator; the preset conduction angle change method is: the target conduction angle of the slow-start thyristor in the target voltage output cycle is greater than the conduction angle in the previous voltage output cycle of the target voltage output cycle.
[0015] A third aspect 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, it implements the steps of the compensation transformer slow-start method of the first aspect above.
[0016] A fourth aspect of the present invention provides a compensation transformer, including a slow-start thyristor, a compensation unit, a compensation transformer, and a control device as described in the third aspect above.
[0017] The primary winding of the compensation transformer is connected to the compensation unit to form multiple compensation circuits; the slow-start thyristor is connected to the compensation unit and is used to control the activation of multiple compensation circuits.
[0018] The control device is connected to the slow-start thyristor and the compensation unit.
[0019] A fifth aspect of the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the compensation transformer slow-start method of the first aspect above.
[0020] The invention provides a method, control device, compensation transformer, and dielectric for the slow-start operation of a compensation transformer. First, when the target compensation circuit needs to activate the voltage regulator's operating circuit, the target conduction angle of the slow-start thyristor within the target voltage output cycle is determined according to a preset conduction angle variation method. Then, within each target voltage output cycle, the slow-start thyristor is controlled to conduct according to the target conduction angle to complete the activation of the target compensation circuit. The preset conduction angle variation method is that the target conduction angle of the slow-start thyristor in the target voltage output cycle is greater than the conduction angle in the previous voltage output cycle. In this way, the compensation transformer can be gradually energized by gradually increasing the conduction angle during the duration of the inrush current, distributing the voltage changes before and after activation across multiple voltage output cycles, thereby effectively reducing the inrush current. Correspondingly, the reduction in inrush current means that the slow-start resistor does not need to bear excessive additional power loss, thus eliminating the need to increase the capacity of the protection circuit breaker in the compensation transformer, and effectively reducing the size of the compensation transformer. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 This is a flowchart illustrating the implementation of the compensation transformer slow-start method provided in this embodiment of the invention.
[0023] Figure 2 This is a schematic diagram of the structure of the slow-start thyristor provided in an embodiment of the present invention;
[0024] Figure 3 This is a schematic diagram of the conduction angle change of the slow-start thyristor provided in an embodiment of the present invention;
[0025] Figure 4 This is a schematic diagram of the voltage regulator provided in an embodiment of the present invention;
[0026] Figure 5 This is a schematic diagram of the structure of the compensation transformer slow-start connection device provided in an embodiment of the present invention;
[0027] Figure 6 This is a schematic diagram of the control device provided in an embodiment of the present invention. Detailed Implementation
[0028] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.
[0029] Figure 1 This is a flowchart illustrating the implementation of the slow-start method for the compensation transformer provided in this embodiment of the invention. Figure 1 As shown, in some embodiments, a method for slow-starting the compensation transformer is used in a voltage regulator. The voltage regulator includes a compensation transformer, a compensation unit, and a slow-start thyristor. The primary winding of the compensation transformer is connected to the compensation unit to form multiple compensation circuits. The slow-start thyristor is connected to the compensation unit and is used to control the activation of the multiple compensation circuits. The method includes:
[0030] S110, when the target compensation circuit needs to be connected to the working circuit of the voltage regulator, for the target voltage output cycle of the compensation transformer, the target conduction angle of the slow-start thyristor within the target voltage output cycle is determined according to the preset conduction angle change method.
[0031] In this embodiment of the invention, the compensation transformer can provide multiple different compensation voltages to the connected equipment by controlling the switching of multiple compensation circuits. When any compensation circuit of the compensation transformer is connected to the working circuit of the voltage regulator, that is, when the compensation transformer is connected to the working circuit of the voltage regulator, or when the voltage level of the compensation transformer is switched (for example, when the compensation voltage is switched from 5V to 10V), a certain inrush current will be generated due to the presence of a circuit connected to the working circuit, which will affect the operation of the compensation transformer.
[0032] Considering that inrush current generally decreases over time, and its maximum peak value often occurs near the time the compensation circuit is activated, a small conduction angle can be set at the activation point of the compensation circuit, i.e., the first voltage output cycle, and then gradually increased to reduce the generated inrush current. The target conduction angle within the target voltage output cycle can be pre-calculated and then used directly during activation. Alternatively, it can be calculated and used during activation; no limitation is made here.
[0033] S120 controls the turn-on of the slow-start thyristor according to the target conduction angle during each target voltage output cycle to complete the activation of the target compensation circuit.
[0034] The target voltage output cycle is any voltage output cycle during the process of the target compensation circuit being put into the working circuit of the voltage regulator; the preset conduction angle change method is: the target conduction angle of the slow-start thyristor in the target voltage output cycle is greater than the conduction angle in the previous voltage output cycle of the target voltage output cycle.
[0035] In this embodiment of the invention, within each target voltage output cycle, the target conduction angle can increase uniformly or non-uniformly in a certain step size until the slow-start thyristor is fully turned on, thus completing the activation of the target compensation circuit. The total number of target voltage output cycles experienced during the activation process can be determined according to actual needs and is not limited here. It should be noted that when the preset number of target voltage output cycles is larger, the actual excitation current generated in each target voltage output cycle is smaller, but the control time will be longer. The target conduction angle corresponding to each target voltage output cycle covers the voltage zero point of the compensation transformer's output voltage, thereby ensuring current freewheeling.
[0036] In this embodiment of the invention, after the compensation circuit is engaged, the conduction angle of the slow-start thyristor is gradually increased over multiple voltage output cycles. This allows the compensation circuit to be gradually engaged over multiple voltage output cycles, distributing the voltage changes before and after engagement across multiple voltage output cycles. This ensures that only a small inrush current is generated in each voltage output cycle, guaranteeing the operation of the compensation transformer. Consequently, the reduction in inrush current means that the slow-start resistor does not need to bear excessive additional power loss, thus eliminating the need to increase the capacity of the protection circuit breaker in the compensation transformer and effectively reducing the size of the compensation transformer.
[0037] Figure 2 This is a schematic diagram of the structure of the slow-start thyristor provided in an embodiment of the present invention. Figure 2 As shown, in some embodiments, the slow-start thyristor includes a positive transistor and a negative transistor. The preset conduction angle change method for both the positive and negative transistors can be uniformly increased, non-uniformly increased, or one can increase uniformly while the other increases non-uniformly. This is not limited here. When the conduction angle change method for both the positive and negative transistors is uniformly increased, their step sizes can be the same or different, which is also not limited here.
[0038] In some embodiments, the turn-off position of the slow-start thyristor remains unchanged. Accordingly, S120 may include: calculating the turn-on position of the slow-start thyristor within the target voltage output cycle based on a preset turn-on position, the current number of conduction cycles, and a first preset step size; wherein, the current number of conduction cycles is the number of target voltage output cycles that the slow-start thyristor has experienced at the current moment; the current number of conduction cycles is not greater than a preset number.
[0039] In this embodiment of the invention, the first preset step size can be 18 degrees, 20 degrees, etc., and is not limited here. The first preset step size is the change in the turn-on position between two adjacent target voltage output cycles. Multiplying the first preset step size by the current number of conduction cycles yields the change between the current turn-on position and the initial turn-on position. Combining this with the preset turn-on position, the turn-on position of the slow-start thyristor within the target voltage output cycle can be obtained.
[0040] Y + =a1*(bn) / b (1)
[0041] Y - =a2-a1*n / b (2)
[0042] Among them, Y + Y represents the open position of the positive pipe. - Let a1 be the preset turn-on position of the negative thyristor, a2 be the preset turn-on position of the positive thyristor, n be the current conduction cycle number, and b be the preset number. The conduction angle change between any two adjacent target voltage output cycles, i.e., the first preset step size, is 180° / b. When the conduction angle increases uniformly, there is a corresponding relationship between the first preset step size and the preset number; either one can be used to calculate the turn-on position of the slow-start thyristor.
[0043] In some embodiments, S120 may include: calculating the duration of the target conduction angle within the target voltage output cycle based on a preset duration width, the current number of conduction cycles, and a second preset step size.
[0044] In this embodiment of the invention, the second preset step size can be 10 degrees, 15 degrees, etc., and is not limited here. Multiplying the second preset step size by the current number of conduction cycles, and adding the preset duration width, yields the target conduction angle. That is:
[0045] W = a³ + n*l (1)
[0046] Where W is the continuous width of the target conduction angle, a3 is the preset continuous width, and l is the second preset step size.
[0047] In some embodiments, S120 may include: determining the inrush current signal of the compensation transformer based on the output voltage of the compensation transformer and a preset delay time; wherein the inrush current signal includes a peak region and a trough region; when the target voltage output cycle is in the peak region of the inrush current signal, calculating the target conduction angle within the target voltage output cycle based on a second preset step size and the conduction angle corresponding to the previous voltage output cycle of the target voltage output cycle; when the target voltage output cycle is in the trough region of the inrush current signal, calculating the target conduction angle within the target voltage output cycle based on a third preset step size and the conduction angle corresponding to the previous voltage output cycle of the target voltage output cycle; wherein the second preset step size is smaller than the third preset step size.
[0048] Magnetizing inrush current typically begins to occur 1 / 4 of a cycle after power is switched on. Its amplitude is generally related to the transformer capacity, and its duration is related to the transformer's secondary load. Therefore, in this embodiment of the invention, the waveform of the magnetizing inrush current signal of the compensation transformer can be roughly determined based on the change in the output voltage of the compensation transformer, the transformer's own parameters, and the 1 / 4-cycle delay time.
[0049] In this embodiment of the invention, the inrush current is a non-periodic oscillating change. Therefore, it can be divided into multiple peak regions and multiple trough regions according to a preset inrush current threshold. If most of the time of a target voltage output cycle is within the peak region, the conduction angle increases according to a second preset step size; otherwise, it increases according to a third preset step size.
[0050] In this embodiment of the invention, after dividing the inrush current, by setting a smaller step size in the region with a larger inrush current, the rate of increase of the conduction angle slows down, which can effectively reduce the excitation current and ensure stability. By setting a larger step size in the region with a smaller inrush current, the rate of increase of the conduction angle speeds up, which can ensure the rapid turn-on of the thyristor.
[0051] In some embodiments, the compensation transformer includes a plurality of second thyristors; the plurality of second thyristors are used to switch the compensation circuit of the compensation transformer. Accordingly, the method for slow-starting the compensation transformer further includes: determining a preset number based on the conduction state of the plurality of second thyristors.
[0052] In this embodiment of the invention, multiple second thyristors achieve various voltage compensations by engaging / disengaging different compensation circuits. Therefore, the engaged compensation circuit can be determined based on the conduction state of the multiple second thyristors, thereby selecting a preset number of compensation circuits. The larger the compensation voltage that the compensation circuit can provide, the larger the preset number.
[0053] It is worth noting that, since the input voltage varies with the operating state of the equipment connected to the compensation transformer, determining the preset number based on the conduction state of the second thyristor can only ensure that the preset number of compensation circuits with higher compensation voltages is higher than that of compensation circuits with lower compensation voltages when they are switched on, and cannot be adaptively adjusted according to changes in the input voltage. Therefore, in some embodiments, the method for slow-starting the compensation transformer further includes: obtaining the actual compensation voltage of the switched-on compensation circuit; and determining the preset number based on the actual compensation voltage.
[0054] In this embodiment of the invention, the actual input voltage is collected, and the actual output voltage is calculated based on the turns ratio of the compensation circuit. The difference is then used to obtain the actual compensation voltage, thereby determining the preset number. The preset number is not only related to the turns ratio of the compensation circuit but also changes adaptively with the input voltage. Therefore, calculating the actual compensation voltage is more effective in eliminating excitation current than monitoring the conduction state of multiple second thyristors.
[0055] In some embodiments, the method for slow-starting the compensation transformer further includes: for a voltage output cycle of the compensation transformer that is located after a preset number of voltage output cycles, controlling the slow-start thyristor to conduct according to the conduction angle of the last voltage output cycle in the preset number of voltage output cycles.
[0056] In this embodiment of the invention, after the slow-start thyristor completes the conduction of a preset number of preset voltage output cycles, the conduction angle at this time is recorded, and the thyristor conducts according to this conduction angle (set as the first conduction angle) in subsequent voltage output cycles.
[0057] It should be noted that if a new compensation circuit is put into operation at this time, the process will jump to S110 and the slow-start thyristor will be re-controlled according to the method provided by this invention.
[0058] This invention provides an embodiment to illustrate the change in the conduction angle of a slow-start thyristor, but it is not intended to be limiting. Figure 3 This is a schematic diagram illustrating the conduction angle change of the slow-start thyristor provided in an embodiment of the present invention. For example... Figure 3 As shown, in some implementation examples, the first preset step size of the slow-start thyristor SCR11 is 18°, the second preset step size is set to 15°, and the preset number is 10. a1 can be set to 180 degrees, a2 can be set to 360 degrees, and a3 can be set to 90 degrees. To ensure that the turn-on width covers the zero-crossing point each time (satisfying the current freewheeling), the turn-on width increases incrementally with each turn.
[0059] 1. For the SCR11 positive tube, the first opening position is at 162°; for the SCR11 negative tube, the first opening position is at 342°, and the width is consistently 90°+15°.
[0060] 2. For the SCR11 positive tube, the second opening position is at 144°; for the SCR11 negative tube, the second opening position is at 324°, and the width is consistently 90°+30°.
[0061] 3. For the SCR11 positive tube, the nth opening position is at 180°*(10-n) / 10; for the SCR11 negative tube, the nth opening position is at 360°-180°*n / 10, with the width remaining at 90°+n*15°.
[0062] The beneficial effects of this invention are as follows: After the compensation circuit is engaged, the slow-start thyristor is first turned on at a small conduction angle, and then the conduction angle is gradually increased in subsequent voltage output cycles. This allows the compensation circuit to be gradually engaged over multiple voltage output cycles, distributing the voltage changes before and after engagement across multiple voltage output cycles. This results in only a small inrush current in each voltage output cycle, ensuring the operation of the compensation transformer without increasing the resistance of the slow-start resistor. Correspondingly, the reduction in inrush current means the slow-start resistor does not need to bear excessive additional power loss, thus eliminating the need to increase the capacity of the protection circuit breaker in the compensation transformer, effectively reducing the size of the compensation transformer.
[0063] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
[0064] Figure 4 This is a schematic diagram of the voltage regulator provided in an embodiment of the present invention. Figure 4 As shown, in some embodiments, the voltage regulator includes a slow-start thyristor 41, a compensation unit 42, a compensation transformer 43, and a control device 44; the primary winding of the compensation transformer 43 is connected to the compensation unit 42 to form multiple compensation circuits; the slow-start thyristor 41 is connected to the compensation unit 42 and is used to control the activation of multiple compensation circuits; the control device 44 is connected to the slow-start thyristor 41 and the compensation unit 42.
[0065] By controlling the conduction angle of the slow-start thyristor SCR11, the excitation current can be controlled without reducing the slow-start resistance. SCR1-SCR10 form compensation unit 42, which, together with compensation transformers T2 and T3, forms multiple compensation circuits. The turns ratio of T2 is 132 / 88 / 6.2, and the turns ratio of T3 is 220 / 20. It should be noted that... Figure 4 The circuits and compensation loops shown are merely examples of the present invention and are not intended to be limiting.
[0066] Figure 5This is a schematic diagram of the structure of the compensation transformer slow-start connection device provided in an embodiment of the present invention. Figure 5 As shown, in some embodiments, a compensation transformer slow-start device is used for a voltage regulator. The voltage regulator includes a compensation transformer, a compensation unit, and a slow-start thyristor. The primary winding of the compensation transformer is connected to the compensation unit to form multiple compensation circuits. The slow-start thyristor is connected to the compensation unit and is used to control the activation of multiple compensation circuits.
[0067] The compensation transformer slow-start device includes:
[0068] The calculation module 510 is used to determine the target conduction angle of the slow-start thyristor within the target voltage output cycle according to the preset conduction angle change method when the target compensation circuit needs to be connected to the working circuit of the voltage regulator.
[0069] The conduction module 520 is used to control the turn-on of the slow-start thyristor according to the target conduction angle during each target voltage output cycle, so as to complete the activation of the target compensation circuit.
[0070] The target voltage output cycle is any voltage output cycle during the process of the target compensation circuit being put into the working circuit of the voltage regulator; the preset conduction angle change method is: the target conduction angle of the slow-start thyristor in the target voltage output cycle is greater than the conduction angle in the previous voltage output cycle of the target voltage output cycle.
[0071] Optionally, the calculation module 510 is specifically used to calculate the turn-on position of the slow-start thyristor within the target voltage output cycle based on the preset turn-on position, the current number of conduction cycles, and the first preset step size; wherein, the current number of conduction cycles is the number of target voltage output cycles that the slow-start thyristor has experienced at the current moment; the current number of conduction cycles is not greater than the preset number.
[0072] Optionally, the calculation module 510 is specifically used to calculate the duration of the target conduction angle within the target voltage output cycle based on the preset duration width, the current number of conduction cycles, and the second preset step size.
[0073] Optionally, the slow-start thyristor includes a positive thyristor and a negative thyristor; the preset turn-on positions include a preset turn-on position for the positive thyristor and a preset turn-on position for the negative thyristor; the continuous width of both the positive and negative thyristors covers the zero point of the output voltage of the compensation transformer. Correspondingly, the calculation module 510 is specifically used for:
[0074] Y + =a1*(bn) / b
[0075] Y - =a2-a1*n / b
[0076] W = a³ + n*l
[0077] Among them, Y + For the opening position of the main pipe, Y - a1 is the preset opening position of the positive tube, a2 is the preset opening position of the negative tube, n is the current number of conduction cycles, b is the preset number; W is the continuous width of the target conduction angle, a3 is the preset continuous width, and l is the second preset step size.
[0078] Optionally, the second conduction module 520 is specifically used to determine the inrush current signal of the compensation transformer based on the output voltage of the compensation transformer and a preset delay time; wherein the inrush current signal includes a peak region and a trough region; when the target voltage output cycle is in the peak region of the inrush current signal, the target conduction angle within the target voltage output cycle is calculated based on the second preset step size and the conduction angle corresponding to the previous voltage output cycle; when the target voltage output cycle is in the trough region of the inrush current signal, the target conduction angle within the target voltage output cycle is calculated based on the third preset step size and the conduction angle corresponding to the previous voltage output cycle; wherein the second preset step size is smaller than the third preset step size.
[0079] Optionally, the compensation transformer includes multiple second thyristors; these multiple second thyristors are used to switch the compensation circuit of the compensation transformer. The compensation transformer slow-start switching device further includes: a number determination module, used to determine a preset number based on the conduction state of the multiple second thyristors; or used to obtain the actual compensation voltage of the switched compensation circuit; and determine the preset number based on the actual compensation voltage.
[0080] Optionally, the compensation transformer slow-start device further includes: a third conduction module, used to control the slow-start thyristor to conduct according to the conduction angle of the last voltage output cycle in the preset number of voltage output cycles for the compensation transformer after a voltage output cycle that is located after a preset number of voltage output cycles.
[0081] Optionally, the slow-start thyristor includes a positive thyristor and a negative thyristor; the initial conduction angle covers the voltage zero point of the output voltage of the compensation transformer.
[0082] The compensation transformer slow-start device provided in this embodiment can be used to execute the above method embodiment. Its implementation principle and technical effect are similar, and will not be described again here.
[0083] Figure 6 This is a schematic diagram of the control device provided in an embodiment of the present invention. Figure 6As shown, an embodiment of the present invention provides a control device 6, which includes a processor 60, a memory 61, and a computer program 62 stored in the memory 61 and executable on the processor 60. When the processor 60 executes the computer program 62, it implements the steps in the various embodiments of the compensation transformer slow-start method described above, for example... Figure 2 Steps 210 to 220 are shown. Alternatively, when processor 60 executes computer program 62, it implements the functions of each module / unit in the above system embodiments, for example... Figure 5 The functions of modules 510 to 620 are shown.
[0084] For example, computer program 62 can be divided into one or more modules / units, one or more of which are stored in memory 61 and executed by processor 60 to complete the present invention. One or more modules / units can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of computer program 62 in control device 6.
[0085] The control device 6 may be an MCU, ECU, etc., and is not limited thereto. The terminal may include, but is not limited to, a processor 60 and a memory 61. Those skilled in the art will understand that... Figure 6 This is merely an example of control device 6 and does not constitute a limitation on control device 6. It may include more or fewer components than shown, or combine certain components, or different components. For example, the terminal may also include input / output devices, network access devices, buses, etc.
[0086] The processor 60 may be a Central Processing Unit (CPU), or 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. A general-purpose processor may be a microprocessor or any conventional processor.
[0087] The memory 61 can be an internal storage unit of the control device 6, such as a hard disk or RAM of the control device 6. The memory 61 can also be an external storage device of the control device 6, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the control device 6. Furthermore, the memory 61 can include both internal storage units and external storage devices of the control device 6. The memory 61 is used to store computer programs and other programs and data required by the terminal. The memory 61 can also be used to temporarily store data that has been output or will be output.
[0088] This invention provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the steps described in the above-described method for the slow start-up of a compensation transformer.
[0089] A computer-readable storage medium stores a computer program 62. The computer program 62 includes program instructions. When executed by the processor 60, the program instructions implement all or part of the processes in the methods described in the above embodiments. The computer program 62 can also instruct related hardware to complete the process. The computer program 62 can be stored in a computer-readable storage medium. When executed by the processor 60, the computer program 62 can implement the steps of the various method embodiments described above. The computer program 62 includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed 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.
[0090] The computer-readable storage medium can be an internal storage unit of the terminal in any of the foregoing embodiments, such as the terminal's hard disk or memory. The computer-readable storage medium can also be an external storage device of the terminal, such as a plug-in hard disk, smart media card (SMC), secure digital card (SD), flash card, etc., equipped on the terminal. Furthermore, the computer-readable storage medium can include both internal storage units and external storage devices of the terminal. The computer-readable storage medium is used to store computer programs and other programs and data required by the terminal. The computer-readable storage medium can also be used to temporarily store data that has been output or will be output.
[0091] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
[0092] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, 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. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.
[0093] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.
[0094] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.
[0095] In the embodiments provided by this invention, it should be understood that the disclosed devices / terminals and methods can be implemented in other ways. For example, the device / terminal embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.
[0096] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0097] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.
[0098] If an integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed 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.
[0099] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.
Claims
1. A method for slow-starting a compensation transformer, characterized in that; This device is used in a voltage regulator, which includes a compensation transformer, a compensation unit, and a slow-start thyristor. The primary winding of the compensation transformer is connected to the compensation unit to form multiple compensation circuits. The slow-start thyristor is connected to the compensation unit and is used to control the activation of the multiple compensation circuits. The method includes: When the target compensation circuit needs to be connected to the working circuit of the voltage regulator, for the target voltage output cycle of the compensation transformer, the target conduction angle of the slow-start thyristor within the target voltage output cycle is determined according to the preset conduction angle change method. During each target voltage output cycle, the slow-start thyristor is controlled to turn on according to the target conduction angle to complete the activation of the target compensation circuit; Wherein, the target voltage output cycle is any voltage output cycle during the process of the target compensation circuit being put into the working circuit of the voltage regulator; the preset conduction angle change method is: the target conduction angle of the slow-start thyristor in the target voltage output cycle is greater than the conduction angle in the previous voltage output cycle of the target voltage output cycle; The step of determining the target conduction angle of the slow-start thyristor within the target voltage output cycle according to a preset conduction angle change method includes: The inrush current signal of the compensation transformer is determined based on the output voltage of the compensation transformer and the preset delay time; wherein the inrush current signal includes a peak region and a trough region. When the target voltage output cycle is in the peak region of the inrush current signal, the target conduction angle within the target voltage output cycle is calculated based on the second preset step size and the conduction angle corresponding to the previous voltage output cycle of the target voltage output cycle. When the target voltage output cycle is in the trough region of the inrush current signal, the target conduction angle within the target voltage output cycle is calculated based on the third preset step size and the conduction angle corresponding to the previous voltage output cycle of the target voltage output cycle. Wherein, the second preset step size is smaller than the third preset step size, and the current number of conduction cycles is not greater than a preset number.
2. The method for slow-starting and energizing a compensating transformer according to claim 1, characterized in that, The compensation unit includes a plurality of second thyristors; the plurality of second thyristors are used to switch the plurality of compensation circuits; The method further includes: The preset number is determined based on the conduction state of the plurality of second thyristors; Alternatively, obtain the actual compensation voltage of the input compensation circuit; determine the preset number based on the actual compensation voltage.
3. The method for slow-starting and energizing a compensating transformer according to claim 1, characterized in that, The method further includes: For the voltage output cycle of the compensation transformer that is located after the preset number of voltage output cycles, the slow-start thyristor is controlled to turn on according to the conduction angle of the last voltage output cycle in the preset number of voltage output cycles.
4. 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 compensation transformer slow-start method as described in any one of claims 1 to 3 above.
5. A voltage regulator, characterized in that, It includes a slow-start thyristor, a compensation unit, a compensation transformer, and the control device as described in claim 4; The primary winding of the compensation transformer is connected to the compensation unit to form multiple compensation circuits; the slow-start thyristor is connected to the compensation unit and is used to control the activation of the multiple compensation circuits. The control device is connected to the slow-start thyristor and the compensation unit.
6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the compensation transformer slow-start method as described in any one of claims 1 to 3.