Compensation circuit access method, control device, and voltage stabilization system

Abstract

The application provides a compensation loop access method, a control device and a voltage stabilizing system. The method comprises the following steps: obtaining the conduction position of a controllable switch in a current output voltage period; obtaining the output voltage frequency of a voltage stabilizer in real time, and determining a real-time counting interval according to the output voltage frequency and a preset counting number; determining the corresponding first counting value of the controllable switch in the current output voltage period based on the counting number and the conduction position; starting counting at the real-time counting interval when the current output voltage period starts, and controlling the controllable switch to conduct when the first counting value is counted. In the application, the actual access process of the compensation loop can be adaptively adjusted according to the output voltage frequency, the generation of the excitation current in the voltage stabilizing process is reduced, and the normal operation of the voltage stabilizer is ensured. On this basis, the application can be effectively applied to the nuclear power field, the stable operation of the electrical equipment for nuclear power is ensured through effective voltage stabilization, and the stable operation of the nuclear power system is ensured.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of circuits, and more particularly relates to a compensation loop access method, a control device and a voltage stabilizing system. BACKGROUND

[0002] Voltage stabilizers are widely used in various industries to compensate for input voltages and obtain stable output voltages. Existing voltage stabilizers usually include a compensation loop, which is connected to the working circuit of the voltage stabilizer to compensate for the input voltage to different degrees.

[0003] In the prior art, the access scheme is set in advance according to the output characteristics of the voltage stabilizer, and the compensation loop is accessed according to the preset access scheme. However, during the actual operation of the voltage stabilizer, the output characteristics of the voltage stabilizer may change, at which time the preset access scheme may no longer be suitable for the voltage stabilizer under the current output characteristics, thereby affecting the normal operation of the voltage stabilizer. SUMMARY

[0004] The application aims to provide a compensation loop access method, a control device and a voltage stabilizing system to solve the technical problem that the preset access scheme cannot be effectively applied when the output characteristics of the voltage stabilizer change in the prior art.

[0005] To achieve the above-mentioned purpose, the application provides a compensation loop access method for accessing a compensation loop in a voltage stabilizer. The voltage stabilizer includes a controllable switch and a compensation loop. The controllable switch is used to connect the compensation loop to the working circuit of the voltage stabilizer after being turned on. The compensation loop access method includes:

[0006] Obtaining the on position of the controllable switch in the current output voltage period;

[0007] Real-time acquisition of the output voltage frequency of the voltage stabilizer, and determination of the real-time counting interval according to the output voltage frequency and the preset counting number;

[0008] Determination of the first counting value corresponding to the controllable switch in the current output voltage period based on the counting number and the on position;

[0009] Counting at the real-time counting interval when the current output voltage period starts, and turning on the controllable switch when the first counting value is counted.

[0010] In one possible implementation, the determination of the real-time counting interval according to the output voltage frequency and the preset counting number includes:

[0011] Ts = 1 / f / m

[0012] Wherein, Ts is the real-time counting interval, f is the output voltage frequency, and m is the preset counting number.

[0013] In a possible implementation, the conduction position is a phase of the output voltage of the voltage stabilizer when the controllable switch is turned on.

[0014] The first counting value corresponding to the controllable switch in the current output voltage period is determined based on the counting number and the conduction position, and the method comprises the following steps.

[0015] The first counting value is calculated by m1 = A / 360° × m, wherein m1 is the first counting value, A is the conduction position, and m is the counting number.

[0016] In a possible implementation, before the conduction position of the controllable switch in the current output voltage period is obtained, the compensation loop access method further comprises the following steps.

[0017] The conduction position of the controllable switch in each output voltage period is determined based on a preset conduction rule.

[0018] The preset conduction rule is as follows.

[0019] From the moment when it is determined that the compensation loop is connected to the working circuit of the voltage stabilizer, the conduction angle of the controllable switch in the first n output voltage periods is gradually increased to a target conduction angle, and the conduction angle of the controllable switch is the target conduction angle after n output voltage periods.

[0020] In a possible implementation, from the moment when it is determined that the compensation loop is connected to the working circuit of the voltage stabilizer, the conduction angle of the controllable switch in the first n output voltage periods is gradually increased to a target conduction angle at a preset step.

[0021] In a possible implementation, the controllable switch is a bidirectional thyristor comprising a positive tube and a negative tube; when i ≤ n, the conduction position of the controllable switch in the ith output voltage period is determined by the following steps.

[0022] The conduction position of the positive tube in the ith output voltage period is determined by Y + = 180° × (n-i) / n, and the conduction position of the negative tube in the ith output voltage period is determined by Y - = 360°-180°×i / n.

[0023] Wherein, Y + is the conduction position of the positive tube in the output voltage period, and Y -a turn-on position of the negative tube in an i-th voltage output period.

[0024] In a possible implementation, the compensation loop access method further includes:

[0025] obtaining a driving width of the controllable switch in a current output voltage period;

[0026] determining a second count value corresponding to the controllable switch in the current output voltage period based on the count number, the turn-on position and the driving width;

[0027] starting counting at a real-time count interval when the current output voltage period starts, and stopping driving the controllable switch when the second count value corresponding to the output voltage period is counted.

[0028] In a possible implementation, the turn-on position is a phase of an output voltage of the voltage stabilizer when the controllable switch is turned on, and the driving width is represented in phase; and the determining of the second count value corresponding to the controllable switch in the current output voltage period based on the count number, the turn-on position and the driving width includes:

[0029] calculating the first count value by m2=(A+B) / 360°×m, where m2 is the second count value, A is the turn-on position, B is the driving width, and m is the count number.

[0030] Another aspect of the present application also provides a control device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the above compensation loop access method when executing the computer program.

[0031] Still another aspect of the present application also provides a voltage stabilizing system, including:

[0032] the above-described voltage stabilizer and control device.

[0033] The compensation loop access method, control device and voltage stabilizing system provided by the present application have the following advantages:

[0034] The present application firstly discretizes the output voltage period of the voltage stabilizer by using preset counting number, obtains real-time counting interval, and then converts the connection of the compensation loop into counting form. When the output voltage frequency of the voltage stabilizer changes, the real-time counting interval will change adaptively. On this basis, the conduction of the controllable switch in the actual connection process of the compensation loop will also change adaptively according to the output voltage frequency. That is, according to the scheme of the present application, as long as the connection scheme (the conduction position of the controllable switch in the current output voltage period) is determined, the actual connection process of the compensation loop can be adjusted adaptively according to the output voltage frequency, thereby solving the problem of the prior art and ensuring the normal operation of the voltage stabilizer. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0036] Figure 1 The flowchart of the compensation loop connection method provided by an embodiment of the present application is shown in the figure.

[0037] Figure 2 The structure diagram of the voltage stabilizing system provided by an embodiment of the present application is shown in the figure.

[0038] Figure 3 The discretization diagram of the output voltage period provided by an embodiment of the present application is shown in the figure.

[0039] Figure 4 The structure diagram of the controllable switch provided by an embodiment of the present application is shown in the figure.

[0040] Figure 5 The driving diagram of the controllable switch provided by an embodiment of the present application is shown in the figure.

[0041] Figure 6 The structure diagram of the control device provided by an embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects of the present application more clearly understood, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0043] The present application will be further described in detail below with reference to the drawings and specific embodiments.

[0044] Please refer to Figure 1, Figure 1 This is a schematic flowchart of a compensation circuit connection method according to an embodiment of the present invention. The compensation circuit connection method provided by this embodiment of the present invention is used to connect a compensation circuit in a voltage regulator. The voltage regulator may include a controllable switch and a compensation circuit. The controllable switch is used to connect the compensation circuit to the working circuit of the voltage regulator after it is turned on.

[0045] For a specific example of a voltage regulator, please refer to [link / reference]. Figure 2 , Figure 2 This is a schematic diagram of a voltage stabilization system provided in an embodiment of the present invention. The voltage stabilization system mainly includes a voltage regulator and a control device. The execution entity of the compensation loop connection method provided in this embodiment of the present invention can be... Figure 2 Control device 44 in the middle, Figure 2 The circuit structure excluding the control device 44 constitutes the voltage regulator. The voltage regulator includes a controllable switch 41, a compensation unit 42, and a compensation transformer 43. The primary winding of the compensation transformer 43 is connected to the compensation unit 42, forming multiple compensation loops. The controllable switch 41 is connected to the compensation unit 42 and, when turned on, connects the compensation loops to the voltage regulator's operating circuit. The control device 44 is connected to both the controllable switch 41 and the compensation unit 42 for controlling the voltage regulator.

[0046] It should be noted that the "working circuit for connecting the compensation circuit to the voltage regulator" described in the embodiments of the present invention may include a working circuit for connecting any one compensation circuit to the voltage regulator, or it may include a working circuit for connecting at least two compensation circuits to the voltage regulator, which is not limited here.

[0047] Based on the above application scenarios, when it is detected that a compensation circuit needs to be connected to the working circuit of the voltage regulator, the compensation circuit connection method of this embodiment includes:

[0048] S101: Obtain the on position of the controllable switch during the current output voltage cycle.

[0049] In this embodiment, the current output voltage cycle refers to the current output voltage cycle of the regulator.

[0050] In this embodiment, the connection scheme of the compensation circuit (i.e., the on-state of the controllable switch during the current output voltage cycle) can be predetermined. When it is detected that the compensation circuit needs to be connected to the working circuit of the voltage regulator, the predetermined connection scheme (i.e., the on-state of the controllable switch during the current output voltage cycle) can be obtained so that the connection scheme can be executed subsequently.

[0051] S102: Real-time acquisition of the output voltage frequency of the voltage regulator, and determination of the real-time counting interval based on the output voltage frequency and the preset number of counts.

[0052] In this embodiment, the output voltage frequency of the voltage regulator can be captured in real time. When it is detected that the compensation circuit needs to be connected to the working circuit of the voltage regulator, the captured output voltage frequency of the voltage regulator can be obtained so that the subsequent connection process can adapt to the current output voltage frequency.

[0053] In one possible implementation, the real-time counting interval is determined based on the output voltage frequency and a preset number of counts, including:

[0054] Ts=1 / f / m

[0055] Where Ts is the real-time counting interval, f is the output voltage frequency, and m is the preset number of counts.

[0056] In this embodiment, to ensure tracking of the output voltage frequency f, m counts are generated for each output voltage cycle. The count is reset after exceeding m, and this process is repeated cyclically (meaning the count is reset to zero at the beginning of each output voltage cycle). Based on this, the preset number of counts is essentially the total number of counts within one output voltage cycle, which is used to discretize the output voltage cycle to obtain the real-time counting interval.

[0057] For example, you can refer to Figure 3 ( Figure 3 The output voltage mentioned refers to the output voltage of the voltage regulator. Assuming the preset count is 80, this is equivalent to discretizing one output voltage cycle into 80 equal parts. Based on this, if the output voltage frequency f = 50Hz, it can be deduced that Ts = 0.25ms; if the output voltage frequency f = 45Hz, then Ts will automatically adjust to 0.28ms. In other words, the real-time counting interval Ts can be adaptively adjusted according to the output voltage frequency of the voltage regulator.

[0058] Based on the real-time adaptive adjustment of the counting interval according to the output voltage frequency of the voltage regulator in this embodiment, the aforementioned access scheme can be converted into a counting trigger mode, thereby ensuring that the compensation circuit can follow the output voltage frequency when connected, and ensuring that the conduction of the controllable switch can be implemented in accordance with the aforementioned access scheme.

[0059] S103: Determine the first count value of the controllable switch within the current output voltage cycle based on the count count and the conduction position.

[0060] In the embodiment, the on position of the controllable switch can be converted into a corresponding counting value by counting the number of times, that is, the on of the controllable switch is converted into a counting trigger mode. Since the real-time counting interval can be adaptively changed according to the output voltage frequency, the on of the controllable switch in the embodiment will also be adaptively changed according to the output voltage frequency, that is, the embodiment can ensure that the phase and frequency of the counter are consistent with the output voltage of the voltage stabilizer by tracking the output voltage frequency / phase of the voltage stabilizer, so as to ensure that the driving wave position of the controllable switch remains at the expected position, thereby ensuring the smooth access of the compensation loop when the output voltage frequency changes.

[0061] S104: At the beginning of the current output voltage period, counting is performed at a real-time counting interval, and the controllable switch is controlled to be turned on when the first counting value is counted.

[0062] In the embodiment, since the number of counts is determined, the counting value of the controllable switch in each output voltage period is fixed regardless of the change of the output voltage frequency. Therefore, according to the scheme of the embodiment of the present application, even if the output voltage frequency changes, the access scheme does not need to be modified. The real-time counting interval of the present embodiment is designed to follow the change of the output voltage frequency, so that only the counting is performed at the latest calculated real-time counting interval at the beginning of the current output voltage period, and the purpose of tracking the output voltage frequency is achieved.

[0063] As can be seen from the above description, the output voltage period of the voltage stabilizer is first discretized by using the preset number of counts in the embodiment of the present application, and the real-time counting interval is obtained. Then, the access of the compensation loop is converted into a counting form. When the output voltage frequency of the voltage stabilizer changes, the real-time counting interval will adaptively change. On this basis, the on of the controllable switch will also adaptively change according to the output voltage frequency during the actual access of the compensation loop. That is, according to the scheme of the embodiment of the present application, as long as the access scheme (the on position of the controllable switch in the current output voltage period) is determined, the actual access process of the compensation loop can be adaptively adjusted according to the output voltage frequency, thereby solving the problem of the prior art and ensuring the normal operation of the voltage stabilizer.

[0064] In a possible implementation, the on position is the phase of the output voltage of the voltage stabilizer when the controllable switch is turned on. The first counting value corresponding to the controllable switch in the current output voltage period is determined based on the number of counts and the on position, and includes:

[0065] The first counting value is calculated by m1=A / 360°×m. Wherein, m1 is the first counting value, A is the on position, and m is the number of counts.

[0066] In a possible implementation, before obtaining the on position of the controllable switch in the current output voltage period, the compensation loop access method further includes:

[0067] The preset conduction rule is used to determine the conduction position of the controllable switch in each output voltage period.

[0068] The preset conduction rule is as follows:

[0069] Since the working circuit of the compensation circuit is determined to be connected to the voltage stabilizer, the conduction angle of the controllable switch in the first n output voltage periods is gradually increased to a target conduction angle, and the conduction angle of the controllable switch is the target conduction angle after n output voltage periods.

[0070] In this embodiment, the compensation circuit connection method can further include the process of determining the connection scheme, that is, the compensation circuit connection method can further include the step of determining the conduction position of the controllable switch in each output voltage period.

[0071] The embodiment of the present application considers that: at the moment of putting the compensation circuit into operation, a magnetizing inrush current is usually generated. The maximum amplitude of the magnetizing inrush current can be several times or even dozens of times of the rated current of the transformer, and the duration is relatively long, about tens of power supply periods or tens of seconds, which is easy to cause damage to the compensation transformer in the compensation circuit and reduce the service life. In addition, since the magnetizing inrush current contains a large number of high-order harmonic components, it is also easy to reduce the quality of the output power of the transformer. At present, the existing technology usually adopts the way of increasing the resistance value of the slow-starting resistor in the compensation transformer to reduce the magnetizing inrush current. However, the greater the resistance value of the slow-starting resistor, the greater the corresponding power loss, and the greater the capacity required for the protection circuit breaker in the compensation transformer, which leads to the larger size of the compensation transformer, affecting the installation of the compensation transformer.

[0072] Therefore, the embodiment of the present application provides a slow-starting scheme to realize the connection of the compensation circuit. That is, the conduction angle of the controllable switch in the first n output voltage periods is gradually increased to a target conduction angle. Considering that the magnetizing inrush current generally decreases over time, and its maximum peak value is often near the time point of putting the compensation circuit into operation, a smaller conduction angle can be set at the time point of putting the compensation circuit into operation, that is, the first output voltage period, and then gradually increased to reduce the generated magnetizing inrush current. The conduction angle in each output voltage period can be calculated in advance and then directly used in the connection process. It can also be calculated and used in the connection process, which is not limited here.

[0073] In the embodiment of the present application, the conduction angle of the controllable switch can be uniformly increased by a certain step size or non-uniformly increased in each output voltage period, until the conduction angle of the controllable switch reaches the target conduction angle, and the compensation loop is connected. The total number (i.e., n) of output voltage periods experienced during the connection process can be determined according to actual requirements, and is not limited herein. It should be noted that the larger n is, the smaller the actual generated excitation current in each output voltage period is, but the control time is longer. The smaller n is, the larger the actual generated excitation current in each output voltage period is, but the control time is shorter. Therefore, the value of n can be reasonably set according to actual requirements to reduce the excitation current while ensuring the control efficiency.

[0074] In the embodiment of the present application, the conduction angle is gradually increased in multiple output voltage periods, so that the compensation loop is gradually connected in multiple voltage output periods. That is, the voltage change before and after the connection is respectively distributed to multiple output voltage periods in the embodiment, so that only a small excitation inrush current is generated in each output voltage, ensuring the normal operation of the voltage stabilizer. Correspondingly, the reduction of the excitation inrush current enables the soft-starting resistor to not bear excessive additional power loss, so that the capacity of the protection circuit breaker in the corresponding compensation transformer does not need to be increased, thereby effectively reducing the volume of the compensation transformer.

[0075] In a possible implementation, the conduction angle of the controllable switch in the first n output voltage periods is gradually increased to the target conduction angle by a preset step size from the time when it is determined that the compensation loop is connected to the working circuit of the voltage stabilizer.

[0076] In the embodiment, the preset step size can be adaptively adjusted.

[0077] For example, the excitation inrush current in the compensation loop can be determined according to the output voltage of the voltage stabilizer and the preset delay time. The excitation inrush current includes a peak region and a valley region. When the voltage output period is in the peak region of the excitation inrush current signal, the conduction angle of the controllable switch can be gradually increased according to a first preset step size. When the voltage output period is in the valley region of the excitation inrush current signal, the conduction angle of the controllable switch can be gradually increased according to a second preset step size. The first preset step size is smaller than the second preset step size.

[0078] The magnetizing inrush current usually starts after 1 / 4 cycle after the compensation circuit is connected, and the amplitude is generally related to the capacity of the transformer, and the duration is related to the secondary load of the transformer. Therefore, in the embodiment of the present application, the waveform of the magnetizing inrush current of the compensation circuit can be predicted according to the change of the output voltage of the compensation transformer, the parameters of the transformer itself, and the delay time of 1 / 4 cycle. Since the magnetizing inrush current is a non-periodic oscillation change, it can be divided into a plurality of peak regions and a plurality of valley regions according to a preset magnetizing inrush current threshold. If most of the time of a certain output voltage period is in the peak region, the conduction angle of the controllable switch increases according to a first preset step size. If most of the time of a certain output voltage period is in the valley region, the conduction angle of the controllable switch increases according to a second preset step size.

[0079] As can be known from the above description, after the magnetizing inrush current is divided in the embodiment of the present application, the step size set in the region with larger inrush current is smaller, and the speed of the conduction angle increase is slower, which can effectively reduce the magnetizing current and ensure stability. The step size set in the region with smaller inrush current is larger, and the speed of the conduction angle increase is faster, which can ensure the fast turn-on of the controllable switch.

[0080] In a possible implementation manner, the controllable switch is a bidirectional thyristor including a positive tube and a negative tube. When i≤n, the conduction position of the controllable switch in the ith output voltage period is determined, including:

[0081] The conduction position of the positive tube in the ith output voltage period is determined by Y + =180°×(n-i) / n, and the conduction position of the negative tube in the ith output voltage period is determined by Y - =360°-180°×i / n.

[0082] Wherein, Y + is the conduction position of the positive tube in the output voltage period, and Y - is the conduction position of the negative tube in the ith output voltage period.

[0083] In the embodiment, the structure of the controllable switch can be as shown in Figure 4 , wherein the compensation voltage of the voltage stabilizer can be increased after the positive tube of the controllable switch is turned on, and the compensation voltage of the voltage stabilizer can be reduced after the negative tube of the controllable switch is turned on.

[0084] In the embodiment, the essence is to gradually increase the conduction angle, and the increase step size is 180° / n. For the positive tube, the conduction angle is 180°-Y + . For the negative tube, the conduction angle is 360°-Y - .

[0085] It is assumed that n=10, and the structure of the voltage stabilizer is as shown in Figure 2If the SCR 11 positive tube is shown, the on position of the SCR 11 positive tube in the first output voltage period is at 162° position. The on position of the SCR 11 negative tube in the first output voltage period is at 342° position. The on position of the SCR 11 positive tube in the second output voltage period is at 144° position. The on position of the SCR 11 negative tube in the second output voltage period is at 324° position. That is, the on position of the SCR 11 positive tube in the i-th output voltage period is at 180°*(10-i) / 10 position. The on position of the SCR 11 negative tube in the i-th output voltage period is at 360°-180°*i / 10 position.

[0086] In combination with the above embodiment, assuming the number of counts is 80, and the on position of the SCR 11 positive tube in the first output voltage period is at 162°, the first count value corresponding to the positive tube is 162° / 360°*80=36, that is, in the first output voltage period, when the count is 36, the control IO outputs high level to drive the positive tube of the SCR 11 to be turned on. Similarly, the on position of the SCR 11 negative tube in the first output voltage period is at 342°, and the first count value corresponding to the negative tube is 342° / 360°*80=76, that is, in the first output voltage period, when the count is 76, the control IO outputs high level to drive the negative tube of the SCR 11 to be turned on. On this basis, the compensation loop can be connected.

[0087] In a possible implementation, the compensation loop connection method further includes:

[0088] The driving width of the controllable switch in the current output voltage period is obtained.

[0089] The second count value corresponding to the controllable switch in the current output voltage period is determined based on the count number, the on position, and the driving width.

[0090] At the beginning of the current output voltage period, counting is performed at a real-time count interval, and the controllable switch is stopped from being driven when the count reaches the second count value corresponding to the output voltage period.

[0091] After the controllable switch is turned on, the controllable switch is automatically turned off after reaching a predetermined angle, but the embodiment considers the current freewheeling problem of the voltage stabilizer and also sets the driving angle of the controllable switch. It is known that, to ensure current freewheeling in the voltage stabilizer, the controllable switch needs to be in a driving state when the output voltage of the voltage stabilizer passes through a zero point, that is, the driving width of the controllable switch needs to cover the zero point of the output voltage of the voltage stabilizer. Therefore, the embodiment also determines the driving width of the controllable switch in each output voltage period during the access process in advance, to ensure that the driving width can cover the zero point of the output voltage of the voltage stabilizer. On this basis, the second count value of the controllable switch in the current output voltage period can be determined according to the count number, the turn-on position, and the predetermined driving width, the controllable switch is stopped from being driven when the output voltage period corresponding to the second count value is counted at a real-time count interval, to avoid affecting the current quality of the voltage stabilizer due to the controllable switch not being in a turn-on state at the zero point of the output voltage of the voltage stabilizer.

[0092] In the embodiment, the second count value of the controllable switch in the current output voltage period can be determined based on the count number, the turn-on position, and the driving width, or can be directly determined based on the first count value, the count number, and the driving width.

[0093] In one possible implementation manner of the embodiment, the turn-on position is the phase of the output voltage of the voltage stabilizer when the controllable switch is turned on, and the driving width is represented by the phase. The second count value of the controllable switch in the current output voltage period is determined based on the count number, the turn-on position, and the driving width, and includes:

[0094] The second count value is calculated by m2=(A+B) / 360°×m. Wherein, m2 is the second count value, A is the turn-on position, B is the driving width, and m is the count number.

[0095] In one possible implementation manner of the embodiment, the turn-on position is the phase of the output voltage of the voltage stabilizer when the controllable switch is turned on, and the driving width is represented by the phase. The second count value of the controllable switch in the current output voltage period is determined based on the count number, the turn-on position, and the driving width, and includes:

[0096] The second count value is calculated by m2=m1+B / 360°×m. Wherein, m2 is the second count value, m1 is the first count value, B is the driving width, and m is the count number.

[0097] In the embodiment, if the controllable switch is a bidirectional thyristor including a positive tube and a negative tube, for the positive tube, the drive width s1 needs to satisfy s1 > 180°- conduction angle; for the negative tube, the drive width s2 needs to satisfy s2 > 360°- conduction angle, so as to ensure that the drive width can cover the zero-crossing point of the output voltage of the voltage stabilizer, thereby ensuring the current freewheeling of the voltage stabilizer.

[0098] In the embodiment, similar to the conduction angle of the controllable switch, from the time when it is determined to connect the compensation loop to the working circuit of the voltage stabilizer, the drive width of the controllable switch can start with a preset width, and the drive width of the controllable switch gradually increases to a target width in the first n output voltage periods, and the drive width of the controllable switch is the target width after n output voltage periods.

[0099] In the embodiment, similar to the conduction angle of the controllable switch, from the time when it is determined to connect the compensation loop to the working circuit of the voltage stabilizer, the drive width of the controllable switch can start with a preset width, and the drive width of the controllable switch gradually increases to a target width in the first n output voltage periods, and the drive width of the controllable switch is the target width after n output voltage periods.

[0100] In combination with the above embodiment, assuming that n = 10, the structure of the voltage stabilizer is as shown in Figure 2 the positive tube of the controllable switch SCR11, the conduction position of the first output voltage period is at the 162° position. The negative tube of the SCR11, the conduction position of the first output voltage period is at the 342° position. The positive tube of the SCR11, the conduction position of the second output voltage period is at the 144° position. The negative tube of the SCR11, the conduction position of the second output voltage period is at the 324° position. That is, the positive tube of the SCR11, the conduction position of the i-th output voltage period is at the 180°*(10-i) / 10 position. The negative tube of the SCR11, the conduction position of the i-th output voltage period is at the 360°-180°*i / 10 position.

[0101] On this basis, assuming that the drive width starts from 90° and increases by 15°, the drive width of the controllable switch SCR11 is 90°+15° for the first output voltage period, 90°+30° for the second output voltage period, and so on, and the drive width of the i-th output voltage period is 90°+i×15°.

[0102] On this basis, combined with the above embodiment, assuming that the number of times is 80, the first output voltage period of the positive tube of the SCR 11 is known to be at 162°, the drive width is 90°+15°, that is, the off angle is at 267°, then the first count value corresponding to the positive tube is 162° / 360°*80=36, and the second count value corresponding to the positive tube is 267° / 360°*80=59. That is, in the first output voltage period, when the count is 36, the control IO outputs a high level to drive the positive tube of the SCR 11 to be turned on, and when the count is 59, the control IO outputs a low level to turn off the positive tube of the SCR 11.

[0103] Similarly, the first output voltage period of the negative tube of the SCR 11 is known to be at 342°, the drive width is 90°+15°, that is, the off angle is at 87°, then the first count value corresponding to the negative tube is 342° / 360°*80=76, and the second count value corresponding to the negative tube is 87° / 360°*80=19. That is, in the first output voltage period, the count starts, when the count is 76, the control IO outputs a high level to drive the negative tube of the SCR 11 to be turned on, and when the count is 19, the control IO outputs a low level to turn off the negative tube of the SCR 11. On this basis, the compensation loop can be connected.

[0104] In a possible implementation, the drive schematic diagram of the controllable switch can be as shown in Figure 5 , wherein, Figure 5 Taking n=10 as an example, Figure 5 The output voltage waveform in the above formula refers to the output voltage waveform of the voltage stabilizer.

[0105] Please refer to Figure 6In another aspect of the present application, a control device 300 is provided, comprising one or more processors 301, one or more input devices 302, one or more output devices 303, and one or more memories 304. The processor 301, the input device 302, the output device 303, and the memory 304 communicate with each other through a communication bus 305. The memory 304 is configured to store a computer program, which comprises program instructions. The processor 301 is configured to execute the program instructions stored in the memory 304. In some embodiments, the processor 301 can be a central processing unit (CPU). The processor can also be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like. The general-purpose processor can be a microprocessor or the processor can be any conventional processor. The input device 302 can include a touchpad, a fingerprint sensor (for collecting fingerprint information and direction information of a fingerprint of a user), a microphone, or the like. The output device 303 can include a display (e.g., an LCD), a speaker, or the like. The memory 304 can include read-only memory (ROM) and random access memory (RAM) and provide instructions and data to the processor 301. A portion of the memory 304 can also include non-volatile memory. For example, the memory 304 can also store device type information. In some embodiments, the processor 301, the input device 302, and the output device 303 described above can implement the first embodiment and the second embodiment of the compensation loop access method provided by the present application.

[0106] Please refer to Figure 2 In another aspect of the present application, a control device 300 is provided, comprising one or more processors 301, one or more input devices 302, one or more output devices 303, and one or more memories 304. The processor 301, the input device 302, the output device 303, and the memory 304 communicate with each other through a communication bus 305. The memory 304 is configured to store a computer program, which comprises program instructions. The processor 301 is configured to execute the program instructions stored in the memory 304. In some embodiments, the processor 301 can be a central processing unit (CPU). The processor can also be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like. The general-purpose processor can be a microprocessor or the processor can be any conventional processor. The input device 302 can include a touchpad, a fingerprint sensor (for collecting fingerprint information and direction information of a fingerprint of a user), a microphone, or the like. The output device 303 can include a display (e.g., an LCD), a speaker, or the like. The memory 304 can include read-only memory (ROM) and random access memory (RAM) and provide instructions and data to the processor 301. A portion of the memory 304 can also include non-volatile memory. For example, the memory 304 can also store device type information. In some embodiments, the processor 301, the input device 302, and the output device 303 described above can implement the first embodiment and the second embodiment of the compensation loop access method provided by the present application.

[0107] The voltage stabilizer and the control device described above.

[0108] Figure 2 In addition to the control device 44, the circuit structure part is a voltage stabilizer, such as Figure 2As shown, the voltage stabilizer comprises controllable switches 41, compensation units 42, and compensation transformers 43. The primary windings of the compensation transformers 43 are connected with the compensation units 42 to form multiple compensation loops. The controllable switches 41 are connected with the compensation units 42, and are used to control the access of the multiple compensation loops. Control devices 44 are connected with the controllable switches 41 and the compensation units 42 to realize the control of the voltage stabilizer. Among them, the SCR1-SCR10 constitute the compensation units 42, and form multiple compensation loops with the compensation transformers T2 and T3, respectively, wherein the transformation ratio of T2 is 132 / 88 / 6.2, and the transformation ratio of T3 is 220 / 20. It should be noted that, Figure 2 The circuit shown in the above and the compensation loop are only examples of the present application, and are not intended to be limiting.

[0109] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for connecting a compensation loop, characterized in that, The compensation circuit connection method is used to connect the compensation circuit in the voltage regulator; the voltage regulator includes a controllable switch and a compensation circuit, and the controllable switch is used to connect the compensation circuit to the working circuit of the voltage regulator after it is turned on. The compensation circuit connection method includes: Obtain the on position of the controllable switch during the current output voltage cycle; The output voltage frequency of the voltage regulator is acquired in real time, and the real-time counting interval is determined based on the output voltage frequency and a preset number of counts. The determination of the real-time counting interval based on the output voltage frequency and the preset number of counts includes: Ts = 1 / f / m, where Ts is the real-time counting interval, f is the output voltage frequency, and m is the preset number of counts. The preset number of counts is the total number of counts within one output voltage cycle. The first count value of the controllable switch in the current output voltage cycle is determined based on the count number and the conduction position. At the start of the current output voltage cycle, counting is performed at the real-time counting interval, and the controllable switch is turned on when the first count value is reached.

2. The compensation loop connection method as described in claim 1, characterized in that, The conduction position is the phase of the output voltage of the regulator when the controllable switch is turned on; Determining the first count value of the controllable switch within the current output voltage cycle based on the count count and the conduction position includes: The first count value is calculated by m1 = A / 360° × m; where m1 is the first count value, A is the conduction position, and m is the number of counts.

3. The compensation loop connection method as described in claim 1, characterized in that, Before obtaining the conduction position of the controllable switch within the current output voltage cycle, the compensation circuit connection method further includes: The conduction position of the controllable switch in each output voltage cycle is determined based on a preset conduction rule. The preset conduction rule is as follows: From the moment the compensation circuit is connected to the working circuit of the voltage regulator, the conduction angle of the controllable switch is gradually increased to the target conduction angle during the first n output voltage cycles, and after n output voltage cycles, the conduction angle of the controllable switch is always the target conduction angle.

4. The compensation loop connection method as described in claim 3, characterized in that, From the moment the compensation circuit is connected to the working circuit of the voltage regulator, the conduction angle of the controllable switch is gradually increased to the target conduction angle in preset steps during the first n output voltage cycles.

5. The compensation loop connection method as described in claim 3, characterized in that, The controllable switch is a bidirectional thyristor containing a positive and a negative transistor; when i≤n, determining the conduction position of the controllable switch in the i-th output voltage cycle includes: Through Y + =180°×(ni) / n determines the conduction position of the positive transistor in the i-th voltage output cycle, and Y... - =360°-180°×i / n determines the conduction position of the negative tube during the i-th voltage output cycle; Among them, Y + Y represents the conduction position of the positive transistor during the output voltage cycle. - The conduction position of the negative transistor during the i-th voltage output cycle.

6. The compensation loop connection method as described in claim 1, characterized in that, The compensation circuit connection method further includes: Obtain the drive width of the controllable switch within the current output voltage cycle; The second count value of the controllable switch in the current output voltage cycle is determined based on the count number, the conduction position, and the drive width. At the start of the current output voltage cycle, counting is performed at the real-time counting interval, and the controllable switch is stopped from being driven when the second count value corresponding to the output voltage cycle is reached.

7. The compensation loop connection method as described in claim 6, characterized in that, The conduction position is the phase of the voltage regulator's output voltage when the controllable switch is turned on, and the drive width is represented by the phase; determining the second count value of the controllable switch within the current output voltage cycle based on the count count, the conduction position, and the drive width includes: The first count value is calculated by m2 = (A + B) / 360° × m; where m2 is the second count value, A is the conduction position, B is the drive width, and m is the number of counts.

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 method as described in any one of claims 1 to 7.

9. A voltage stabilizing system, characterized in that, include: The voltage regulator as described in claim 1 and the control device as described in claim 8.

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