WO2022052128A1

WO2022052128A1 - Voltage compensation method, apparatus, and device

Info

Publication number: WO2022052128A1
Application number: PCT/CN2020/115152
Authority: WO
Inventors: 邓家勇; 刘鹏飞; 刘晓红; 吴壬华
Original assignee: 深圳欣锐科技股份有限公司
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2022-03-17
Also published as: CN113454895B; CN113454895A

Abstract

A voltage compensation method, apparatus, and device. Said method comprises: acquiring a first voltage to be compensated outputted after a first alternating-current voltage at the current moment passes through a voltage filter (S100); according to hysteresis duration of the voltage filter and an angular frequency of said first voltage, determining a compensation phase angle of said first voltage (S101), wherein the hysteresis duration of the voltage filter is determined by the capacitance value and the resistance value of the voltage filter; and according to said first voltage, the angular frequency of said first voltage, and the compensation phase angle, determining an output voltage of said first voltage after said first voltage is subjected to voltage phase compensation (S102). Said method performs voltage phase compensation on a voltage to be compensated after said voltage passes through a voltage filter, greatly increasing the power factor.

Description

Voltage compensation method, device and equipment

technical field

The present application relates to the technical field of power electronics, and in particular, to a voltage compensation method, device and equipment.

Background technique

In power electronics technology, when the AC voltage is passed through a voltage filter to filter out the high-frequency noise interference of the AC voltage, since the voltage filter includes nonlinear devices such as capacitors and resistors, the voltage across the capacitor cannot be abruptly changed, resulting in filtering The resulting AC voltage and current are out of phase. According to the definition of Power Factor (PF), PF=P/S, where P represents active power,

S represents the apparent power, and without considering the current harmonics, S=U _IN ×I _IN , we can get

is the phase difference between voltage and current. It can be seen that PF is a parameter to measure the utilization efficiency of electric energy. The higher the PF value, the higher the active power, the lower the reactive power, the higher the energy utilization rate, and the PF value is related to the phase difference between voltage and current. .

In the prior art, in order to improve the PF value, the adopted power factor correction technology (Power Factor Correction, PFC) is a power factor correction circuit composed of inductors, semiconductor devices and capacitors, etc., and increases the conduction angle of the input current to improve the circuit. Power factor, the effect of power factor correction in the prior art solution is not good enough, and the power factor is not high enough.

SUMMARY OF THE INVENTION

Based on the above problems, the present application provides a voltage compensation method, which can greatly improve the power factor by performing voltage phase compensation on the voltage to be compensated after passing through the voltage filter.

In a first aspect, an embodiment of the present application provides a voltage compensation method, the method comprising:

Obtain the first voltage to be compensated output after the first AC voltage at the current moment passes through the voltage filter;

Determine the compensation phase angle of the first voltage to be compensated according to the delay time of the voltage filter and the angular frequency of the first voltage to be compensated, wherein the delay time of the voltage filter is determined by the voltage filter The capacitance value and resistance value are determined;

According to the first to-be-compensated voltage, the angular frequency of the first to-be-compensated voltage, and the compensated phase angle, the output voltage after voltage phase compensation of the first to-be-compensated voltage is determined.

In a possible embodiment, the method further includes:

Obtain the second voltage to be compensated output after the first AC voltage at the first moment passes through the voltage filter, wherein the first moment is before the current moment and the time interval between the first moment and the current moment is the first preset time interval;

The determining, according to the first to-be-compensated voltage, the angular frequency of the first to-be-compensated voltage, and the compensated phase angle, the output voltage after the voltage phase compensation of the first to-be-compensated voltage includes:

The first to-be-compensated voltage is determined according to the first to-be-compensated voltage, the second to-be-compensated voltage, the first preset time interval, the angular frequency of the first to-be-compensated voltage, and the compensation phase angle The output voltage after voltage phase compensation is performed.

In a possible implementation manner, before determining the compensation phase angle of the first voltage to be compensated according to the lag duration of the voltage filter and the angular frequency of the first voltage to be compensated includes:

collecting the first voltage to be compensated at a second preset time interval and recording the number of voltage collections;

If the third to-be-compensated voltage collected at the second moment is smaller than the initial bias voltage, and the fourth to-be-compensated voltage collected at the third moment is greater than the initial bias voltage, the recorded voltage corresponding to the third moment is collected The number of times is taken as the target voltage collection times, and the angular frequency of the first voltage to be compensated is determined according to the target voltage collection times and the second preset time interval, wherein the time between the second moment and the third moment is The time interval is the second preset time interval, and the second moment is before the third moment.

Further, the second preset time interval is the voltage collection interval of each collection period;

If the third to-be-compensated voltage collected at the second moment is smaller than the initial bias voltage, and the fourth to-be-compensated voltage collected at the third moment is greater than the initial bias voltage, the third moment corresponds to the The recorded voltage acquisition times as the target voltage acquisition times include:

If the third to-be-compensated voltage collected at the second moment is smaller than the initial bias voltage, and the fourth to-be-compensated voltage collected at the third moment is greater than the initial bias voltage, the third The number of voltage acquisitions recorded corresponding to the time is taken as the number of voltage acquisitions in the current acquisition cycle, and the number of voltage acquisitions is cleared to record the number of voltage acquisitions in the next acquisition cycle;

The target voltage acquisition times are determined according to the voltage acquisition times in n acquisition cycles, where n is a positive integer greater than 1.

Optionally, the first AC voltage is output by the AC voltage source through a voltage bias circuit, and the voltage bias circuit is used to provide the initial bias voltage, so that the first AC voltage output by the AC voltage source The voltage value is not less than zero.

In a possible implementation manner, according to the first voltage to be compensated, the angular frequency of the first voltage to be compensated, and the compensation phase angle, the first voltage to be compensated is determined after voltage phase compensation is performed on the first voltage to be compensated. The output voltage is:

u _ac1 =u _ac .sin(wt+θ)

Wherein, t is the current time, u _ac is the amplitude of the first voltage to be compensated, w is the angular frequency of the first voltage to be compensated, and θ is the compensation phase angle.

In another possible implementation manner, the first voltage to be compensated, the second voltage to be compensated, the first preset time interval, the angular frequency of the first voltage to be compensated, and the The compensation phase angle is determined, and the output voltage after the voltage phase compensation of the first voltage to be compensated is determined as:

Wherein, t is the current time, u _ac .sin(wt) is the first voltage to be compensated, u _aclast is the second voltage to be compensated, T _s is the first preset time interval, and w is the The angular frequency of the first voltage to be compensated, and θ is the compensation phase angle.

In a second aspect, an embodiment of the present application further provides a voltage compensation device, and the voltage compensation device includes:

an obtaining module, configured to obtain the first voltage to be compensated output after the first AC voltage at the current moment passes through the voltage filter;

A determination module, configured to determine the compensation phase angle of the first voltage to be compensated according to the delay time of the voltage filter and the angular frequency of the first voltage to be compensated, wherein the delay time of the voltage filter is determined by the Determine the capacitance value and resistance value of the voltage filter;

The determining module is further configured to determine, according to the first voltage to be compensated, the angular frequency of the first voltage to be compensated, and the compensation phase angle, the output voltage after voltage phase compensation is performed on the first voltage to be compensated .

In a third aspect, embodiments of the present application further provide a voltage compensation device, the device includes a transceiver, a processor, and a memory, wherein the processor is configured to execute a computer program stored in the memory to implement any of the above A possible example.

In a fourth aspect, the present application further provides a computer-readable storage medium, where instructions are stored in the readable storage medium, which, when executed on a computer, cause the computer to execute the methods described in the above aspects.

In the present application, the voltage compensation device obtains the first voltage to be compensated output after the first AC voltage at the current moment passes through the voltage filter; according to the lag time length of the voltage filter and the angular frequency of the first voltage to be compensated, determine The compensation phase angle of the first voltage to be compensated, wherein the lag time of the voltage filter is determined by the capacitance value and resistance value of the voltage filter; according to the first voltage to be compensated, the first voltage to be compensated The angular frequency of the voltage and the compensation phase angle determine the output voltage after voltage phase compensation is performed on the first voltage to be compensated. By implementing the embodiments of the present application, voltage phase compensation is performed on the voltage to be compensated after passing through the voltage filter, which can greatly improve the power factor.

Description of drawings

FIG. 1 is a schematic flowchart of a voltage compensation method provided by an embodiment of the present application;

2 is a schematic diagram of a voltage waveform provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of a voltage acquisition provided by an embodiment of the present application;

FIG. 4 provides a schematic structural diagram of a voltage compensation system according to an embodiment of the present application;

FIG. 5 is a structural block diagram of a voltage compensation device provided by an embodiment of the present application;

FIG. 6 is a structural block diagram of a voltage compensation device provided by an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

The implementation of the technical solutions of the present application will be further described in detail below with reference to the accompanying drawings, referring to FIGS. 1 to 3 .

Referring first to FIG. 1 , FIG. 1 is a schematic flowchart of a voltage compensation method provided by an embodiment of the present application. As shown in Figure 1, the specific execution steps of the embodiment of the present application are as follows:

S100. The voltage compensation device obtains the first voltage to be compensated output after the first AC voltage at the current moment passes through the voltage filter. Specifically, the voltage compensation device has an analog-to-digital conversion function, which can collect the first voltage to be compensated and convert the first voltage to be compensated into a digital signal, and the voltage filter includes at least one capacitor and at least one A resistor, which can form a high-pass filter, a low-pass filter, a band-pass filter or a band-stop filter, etc., is used to filter out the high-frequency noise interference of the first AC voltage. Since the capacitor is a nonlinear component, the phase of the first voltage to be compensated obtained after the first AC voltage passes through the voltage filter lags behind the phase of the first AC voltage. For a phase relationship of the voltage to be compensated, reference may be made to FIG. 2 , which is a schematic diagram of a voltage waveform provided by an embodiment of the present application. As shown in FIG. 2 , the phase of the first voltage to be compensated lags the phase of the first AC voltage by a time T.

S101. The voltage compensation device determines the compensation phase angle of the first voltage to be compensated according to the delay time of the voltage filter and the angular frequency of the first voltage to be compensated, wherein the delay time of the voltage filter is Determined by the capacitance value and resistance value of the voltage filter. Specifically, in the voltage filter, the lag time of the voltage filter is the product of the resistance and the capacitance, that is, the lag time T=RC, where R is the resistance value of the voltage filter, and C is the voltage Capacitance value of the filter. It can be understood that the voltage filter is a hardware filter, that is, the resistance and capacitance of the voltage filter are actually used components, and the lag time of the voltage filter is based on the resistance value actually used by the voltage filter. It is determined by the capacitance value and is a preset fixed value. The voltage compensation device determines the compensation phase angle θ=wT of the first voltage to be compensated according to the lag time T of the voltage filter and the angular frequency w of the first voltage to be compensated.

The delay time T of the voltage filter is preset, and the acquisition of the angular frequency will be described in detail below. In a possible implementation manner, before performing step S101, the voltage compensation apparatus includes: the voltage compensation apparatus collects the first voltage to be compensated at a second preset time interval and records the number of voltage collections. Optionally, the first preset time interval and the second preset time interval may be the same. Specifically, referring to FIG. 3 , FIG. 3 is a schematic diagram of voltage acquisition provided by an embodiment of the present application. As shown in FIG. 3 , taking the second preset time interval as T _s as an example, the second preset time interval can be adjusted by changing the operating frequency of the voltage compensation device. If the third to-be-compensated voltage collected at the second moment is smaller than the initial bias voltage, it can be understood that the first AC voltage includes a negative voltage, in order to make the negative voltage part of the first AC voltage not less than A zero voltage, for example, the first AC voltage may be output by an AC voltage source through a voltage bias circuit, and the voltage bias circuit is configured to provide the initial bias voltage, so that the first AC voltage output by the AC voltage source is The voltage value of an AC voltage is not less than zero, so the voltage value of the first voltage to be compensated obtained by the first AC voltage through the voltage filter is not less than zero; for another example, the first voltage to be compensated may be Through the output of the voltage bias circuit to the voltage compensation device, it is realized that the voltage value of the first voltage to be compensated is not less than zero. The implementation of this embodiment is beneficial to the voltage collection of the voltage compensation device, so that the voltages collected by the voltage collection device are all positive voltages.

In the case where the fourth voltage to be compensated collected by the voltage compensation device at the third time is greater than the initial bias voltage, the number of voltage collections recorded corresponding to the third time is taken as the target voltage collection times, according to the The number of target voltage acquisitions and the second preset time interval to determine the angular frequency of the first voltage to be compensated, wherein the time interval between the second moment and the third moment is the second preset time interval, the second time is before the third time. Exemplarily, multiplying the second preset time interval T _s by the target voltage collection times N to obtain the period of the first voltage to be compensated is N×T _s , for example, the second time corresponds to the recorded voltage The number of acquisitions is 18, the number of voltage acquisitions corresponding to the third moment is 19, and the second preset time interval T _s is 1ms, then the acquisition period of the first voltage to be compensated is 19ms, which is defined by the angular frequency The angular frequency w=2π/(n×T _s ) of the first voltage to be compensated can be obtained by the formula. Optionally, the number of voltage collection times recorded corresponding to the second moment may also be used as the target voltage collection times, that is, the collection period of the first voltage to be compensated is 18 ms. Further, in order to reduce the error of the acquisition period of the first voltage to be compensated, the operating frequency of the voltage compensation device may be set as high as possible, that is, the second preset time interval is as small as possible.

Further, in order to improve the accuracy of the angular frequency of the first voltage to be compensated, data processing may be performed on the number of voltage acquisitions within n acquisition cycles to obtain the target voltage acquisition number, where n is a positive integer greater than 1. . Exemplarily, the second preset time interval is the voltage collection interval of each collection period; if the third voltage to be compensated collected at the second moment is smaller than the initial bias voltage, and the third The fourth to-be-compensated voltage collected at time is greater than the initial bias voltage, and the voltage compensation device takes the voltage collection times recorded corresponding to the third time as the voltage collection times of the current collection cycle, and uses the voltage collection times Clear to record the number of voltage acquisitions in the next acquisition cycle; the voltage compensation device determines the target voltage acquisition number according to the number of voltage acquisitions in n acquisition cycles, where n is a positive integer greater than 1. Taking n being 5 as an example, the voltage compensation device continuously acquires the voltage acquisition times of 5 acquisition periods, and the voltage acquisition times of the 5 acquisition periods are 19, 18, 18, 17 and 18 respectively. In a possible implementation manner, the voltage compensation device may use the mode of the number of voltage acquisitions in n acquisition periods, that is, 5 acquisition periods, as the target voltage acquisition times, that is, the target voltage acquisition times is 18 ; In another possible implementation manner, the voltage compensation device may use the average value of the number of voltage acquisitions in the n acquisition periods, that is, 5 acquisition periods, as the target voltage acquisition times, that is, the target voltage The number of acquisitions is 18. It should be noted that the present application does not limit how to process the data of the number of voltage acquisitions to obtain the target number of voltage acquisitions.

S102. The voltage compensation device determines, according to the first voltage to be compensated, the angular frequency of the first voltage to be compensated, and the compensation phase angle, an output voltage after voltage phase compensation is performed on the first voltage to be compensated. Specifically, the voltage compensation device obtains in step S100 that the first voltage to be compensated is u _ac .sin(wt), and determines the compensation phase angle θ of the first voltage to be compensated in step S101 . In a possible implementation manner, the voltage compensation device determines, according to the first voltage to be compensated, the angular frequency of the first voltage to be compensated, and the compensation phase angle, the voltage to be compensated for the first voltage to be compensated The output voltage after phase compensation is:

u _ac1 =u _ac .sin(wt+θ) Equation 1

In order to reduce the computation amount of the voltage compensation device, in another possible implementation manner, the voltage compensation device obtains the second to-be-compensated output of the first AC voltage at the first moment after passing through the voltage filter. voltage, wherein the first moment is before the current moment, and the time interval between the first moment and the current moment is a first preset time interval; the voltage compensation device is based on the first voltage to be compensated, the The second to-be-compensated voltage, the first preset time interval, the angular frequency of the first to-be-compensated voltage, and the compensated phase angle determine the output voltage of the first to-be-compensated voltage after voltage phase compensation.

Specifically, formula 2 can be obtained from formula 1 as follows:

u _ac1 =u _ac .sin(wt)cos(θ)+u _ac .cos(wt)sin(θ) Equation 2

Wherein u _ac .sin(wt) is the first voltage to be compensated, obtained by the voltage compensation device through step S100, and u _ac .cos(wt) can be expressed as:

Wherein u _ac .sin(wt) is the first voltage to be compensated, u _aclast is the second voltage to be compensated, that is, u _aclast =u _ac .sin[w(tT _s )], w is the first voltage The angular frequency of the voltage to be compensated, T _s is the first preset time interval.

Therefore, from the formula 2 and the formula 3, it can be obtained that the output voltage after the voltage phase compensation of the first voltage to be compensated is:

Wherein, t is the current moment, u _ac .sin(wt) is the first voltage to be compensated, and u _aclast is the second voltage to be compensated, that is, u _aclast =u _ac .sin[w(tT _s ) ], T _s is the first preset time interval, w is the angular frequency of the first voltage to be compensated, and θ is the compensation phase angle.

From the comparison between the formula 4 and the formula 1, it can be known that the formula 1 needs to obtain the phase angle wt of the first voltage to be compensated in real time, and the phase angle wt is obtained after locking the first voltage to be compensated. Exemplary, it can be realized by the code that realizes the phase-locked loop, it can be seen that formula 1 needs to add software code to realize; formula 4 converts the sine operation into the four arithmetic operations of addition, subtraction, multiplication and division, and obtains the real-time acquisition by step S100. u _ac .sin(wt) and u _aclast can be obtained by querying the first voltage to be compensated. It can be known from step S101 that θ=wT, the angular frequency w of the first voltage to be compensated is constant, and T is The preset value, the sine and cosine value of the compensation phase angle can be calculated by the voltage compensation device once or K times to obtain the result, K is a preset positive integer, and there is no need to add additional It can release the software resources of the voltage compensation device and reduce the operation time of the voltage compensation device.

In the present application, the voltage compensation device obtains the first voltage to be compensated output after the first AC voltage at the current moment passes through the voltage filter; according to the lag time length of the voltage filter and the angular frequency of the first voltage to be compensated, determine The compensation phase angle of the first voltage to be compensated, wherein the lag time of the voltage filter is determined by the capacitance value and resistance value of the voltage filter; according to the first voltage to be compensated, the first voltage to be compensated The angular frequency of the voltage and the compensation phase angle determine the output voltage after voltage phase compensation is performed on the first voltage to be compensated. By implementing the application embodiment, the voltage phase compensation is performed on the voltage to be compensated after passing through the voltage filter, so that the power factor can be greatly improved.

The voltage compensation system is exemplarily described below with reference to the accompanying drawings. Referring to FIG. 4 , FIG. 4 provides a schematic structural diagram of a voltage compensation system according to an embodiment of the present application. As shown in FIG. 4 , the voltage compensation system includes a voltage compensation device 40 , a voltage filter 41 , a voltage bias circuit 42 , an AC voltage source 43 and a totem pole boost topology circuit 44 . It should be noted that, the voltage compensation device 40 may implement any one of the possible embodiments described in FIG. 1 to FIG. 3 . Exemplarily, the voltage compensation device 40 may perform all of the functions of the totem pole boost topology circuit 44 . The controlled circuit performs power factor correction, and can also be combined with any circuit topology that controls the conduction and closure of the switch tube through pulse width modulation (PWM) to achieve the same phase of current and voltage, such as Interleaved parallel Boost PFC topology or zero-ripple Boost PFC topology, this embodiment takes a totem-pole Boost topology circuit as an example for illustrative description.

The voltage compensation device 40 may include a voltage acquisition unit 400, a voltage phase compensation unit 401, a calculation unit 402, a voltage loop controller 403, a current acquisition unit 404, a current loop controller 405, and a PWM generator 406. Optionally , the voltage compensation device 40 may be a central processing unit (central processing unit, CPU), a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), an off-the-shelf programmable gate array ( field-programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Specifically, the voltage acquisition unit 400 is configured to collect the first voltage to be compensated; the voltage phase compensation unit 401 performs phase compensation on the first voltage to be compensated to obtain a voltage for the first voltage to be compensated The output voltage after phase compensation; the voltage loop controller 403 is used to stabilize the output voltage of the totem-pole boost topology circuit 44; the current loop controller 405 is used to control the PWM waveform generated by the PWM generator 406 duty cycle.

The specific implementation principle of the voltage compensation system is as follows: the AC voltage source 43 outputs an AC voltage, and the first AC voltage is obtained through the voltage bias circuit 42. Optionally, the voltage bias circuit 42 also Can be placed after the voltage filter 41 . The phase of the first voltage to be compensated after passing through the voltage filter 41 lags behind the voltage output by the AC voltage source 43 , and reference may be made to FIG. 2 for a schematic diagram of the specific phase lag. The voltage acquisition unit 400 in the voltage compensation device 40 acquires the first voltage to be compensated, and transmits the first voltage to be compensated to the voltage phase compensation unit 401 to obtain a voltage for the first voltage to be compensated. For the output voltage after phase compensation, the output voltage after phase compensation is used as the input of the multiplier. It can be understood that the multiplier and the calculation of the difference between the two are the functions implemented by the calculation unit 402 . The other input of the multiplier comes from the output of the voltage loop controller 403 , and the input of the voltage loop controller 403 is the difference between the reference voltage and the output voltage of the totem-pole boost topology circuit 44 The reference voltage is preset and is the voltage expected to be output by the totem-pole boost topology circuit. The multiplier obtains the reference reference current of the current loop controller according to the output of the voltage phase compensation module 401 and the output of the voltage loop controller 403 . The voltage to be compensated is phase compensated, that is, it can be understood that the phase of the reference reference current is the same as the phase of the first AC voltage. The current acquisition unit 404 collects the current of the inductor at the input end of the totem-pole boost topology circuit 44, and uses the difference between the current of the inductor and the reference current of the current loop controller as the current loop control The current loop controller 405 controls the duty cycle of the PWM generator 406 to generate the PWM waveform, and the PWM generator 406 outputs the generated PWM waveform to the totem-pole boost topology circuit 44 Among the four switch tubes, the on and off states of the switch tubes are controlled, so that after the first AC voltage passes through the voltage filter 41, the totem-pole Boost topology circuit 44 generates current. The phase is the same as the phase of the first AC voltage. It should be noted that, if the voltage phase compensation of the present application is not adopted, the duty cycle of the PWM waveform generated by the PWM generator 406 will not be accurate enough, thereby causing the first AC voltage to pass through the voltage filter 41 . The subsequent phase is different from the current phase in the circuit where the totem-pole Boost topology circuit 44 is located. In this embodiment, the control parameters of the PWM waveform duty cycle that control the on and off states of the switch are adjusted, That is, by adjusting the reference reference current, by performing phase compensation on the first voltage to be compensated, the phase of the reference reference current is the same as the phase of the first AC voltage, thereby controlling the duty cycle of the PWM output by the PWM generator The phase of the first AC voltage after passing through the voltage filter can be made the same as the phase of the current in the circuit where the totem-pole Boost topology circuit is located, thereby further improving the power factor.

An embodiment of the present application further provides a voltage compensation device. Referring to FIG. 5 , FIG. 5 is a structural block diagram of a voltage compensation device provided by an embodiment of the present application. As shown in FIG. 5 , the voltage compensation device 50 includes:

The obtaining module 500 is used for obtaining the first voltage to be compensated output after the first AC voltage at the current moment passes through the voltage filter;

A determination module 501, configured to determine the compensation phase angle of the first voltage to be compensated according to the delay time of the voltage filter and the angular frequency of the first voltage to be compensated, wherein the delay time of the voltage filter is determined by The capacitance value and resistance value of the voltage filter are determined;

The determining module 501 is further configured to determine the output of the first voltage to be compensated after voltage phase compensation is performed according to the first voltage to be compensated, the angular frequency of the first voltage to be compensated, and the compensation phase angle Voltage.

In a possible embodiment, the obtaining module 500 is further configured to obtain a second voltage to be compensated output after the first AC voltage at a first moment passes through the voltage filter, wherein the first moment Before the current moment, and the time interval between the current moment and the current moment is the first preset time interval;

The determining module 501 is further configured to determine according to the first voltage to be compensated, the second voltage to be compensated, the first preset time interval, the angular frequency of the first voltage to be compensated, and the compensation phase angle, and determine the output voltage after voltage phase compensation is performed on the first voltage to be compensated.

In a possible implementation manner, the acquiring module 500 is further configured to acquire the first voltage to be compensated at a second preset time interval;

The voltage compensation device 50 further includes a recording module 502;

The recording module 502 is used to record the number of voltage acquisitions;

The recording module 502 is also used for the case where the third voltage to be compensated collected at the second moment is smaller than the initial bias voltage, and the fourth voltage to be compensated collected at the third moment is greater than the initial bias voltage , taking the voltage collection times recorded corresponding to the third moment as the target voltage collection times, and the determining module 501 is further configured to determine the first voltage collection times according to the target voltage collection times and the second preset time interval The angular frequency of the voltage to be compensated, wherein the time interval between the second moment and the third moment is the second preset time interval, and the second moment is before the third moment.

The determining module 501 is further configured to collect the third voltage to be compensated at the second moment is smaller than the initial bias voltage, and the fourth voltage to be compensated collected at the third moment is greater than the initial bias In the case of voltage, the number of voltage acquisitions recorded corresponding to the third moment recorded by the recording module 502 is taken as the number of voltage acquisitions in the current acquisition cycle, and the number of voltage acquisitions is cleared to record the number of voltage acquisitions in the next acquisition cycle. The number of voltage acquisitions;

The determining module 501 is further configured to determine the target voltage collection times according to the voltage collection times of n collection cycles, where n is a positive integer greater than 1.

In a possible implementation manner, the output voltage after voltage phase compensation is performed on the first voltage to be compensated determined by the determining module 501 is:

u _ac1 = u _ac .sin(wt+θ) Equation 5

In another possible implementation manner, the output voltage after voltage phase compensation is performed on the first voltage to be compensated determined by the determining module 501 is:

Referring to FIG. 6, FIG. 6 is a structural block diagram of a voltage compensation device provided by an embodiment of the present application. As shown in FIG. 6 , the voltage compensation device 60 includes a transceiver 600, a processor 601 and a memory 602, wherein:

The transceiver 600 is used to obtain the first voltage to be compensated, and the processor 600 may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors ( digital signal processor, DSP), application specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components Wait. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

Instructions are stored in the memory 602. It can be understood that the memory 602 stores the first preset time interval, the compensation phase angle, the sine value and/or cosine value of the compensation phase angle, etc. Wait. Exemplarily, the memory 602 may include read-only memory and random access memory, and provides instructions and data to the processor 601 and the transceiver 600 . A portion of memory 602 may also include non-volatile random access memory. For example, memory 602 may also store information on device type

The processor 601 is configured to execute the computer program stored in the memory to implement any one of the possible embodiments described above.

In the specific implementation, the above-mentioned voltage compensation device can execute the implementation manner provided by each step in the above-mentioned FIG. 1 to FIG. 4 through its built-in function modules. For details, please refer to the implementation manner provided by each step in the above-mentioned FIG. 1 to FIG. 4 . , will not be repeated here

The present application provides a computer-readable storage medium, in which instructions are stored, which, when executed on a computer, cause the computer to execute any one of the possible embodiments described above.

It should be noted that the above-mentioned terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance.

In the several embodiments provided in this application, it should be understood that the disclosed method, apparatus and system may be implemented in other manners. The above-described embodiments are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined, or Integration into another system, or some features can be ignored, or not implemented. In addition, the coupling, or direct coupling, or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be electrical, mechanical or other forms. of.

The unit described above as a separate component may or may not be physically separated, and the component displayed as a unit may or may not be a physical unit, that is, it may be located in one place or distributed to multiple network units; Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may all be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integration The unit can be implemented either in the form of hardware or in the form of hardware plus software functional units.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by program instructions related to hardware, the aforementioned program may be stored in a computer-readable storage medium, and when the program is executed, execute Including the steps of the above method embodiment; and the aforementioned storage medium includes: a mobile storage device, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk and other various A medium on which program code can be stored.

Alternatively, if the above-mentioned integrated unit of the present invention is implemented in the form of a software function module and sold or used as an independent product, it may also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present invention may be embodied in the form of software products in essence or the parts that make contributions to the prior art. The computer software products are stored in a storage medium and include several instructions for A computer device (which may be a personal computer, a server, or a network device, etc.) is caused to execute all or part of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: a removable storage device, a ROM, a RAM, a magnetic disk or an optical disk and other mediums that can store program codes.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

A voltage compensation method, characterized in that the method comprises:

Obtain the first voltage to be compensated output after the first AC voltage at the current moment passes through the voltage filter;

Determine the compensation phase angle of the first voltage to be compensated according to the delay time of the voltage filter and the angular frequency of the first voltage to be compensated, wherein the delay time of the voltage filter is determined by the voltage filter The capacitance value and resistance value are determined;

According to the first to-be-compensated voltage, the angular frequency of the first to-be-compensated voltage, and the compensated phase angle, the output voltage after voltage phase compensation of the first to-be-compensated voltage is determined.
The method according to claim 1, wherein the method further comprises:

Obtain the second voltage to be compensated output after the first AC voltage at the first moment passes through the voltage filter, wherein the first moment is before the current moment and the time interval between the first moment and the current moment is the first preset time interval;

The determining, according to the first to-be-compensated voltage, the angular frequency of the first to-be-compensated voltage, and the compensated phase angle, the output voltage after the voltage phase compensation of the first to-be-compensated voltage includes:

The first to-be-compensated voltage is determined according to the first to-be-compensated voltage, the second to-be-compensated voltage, the first preset time interval, the angular frequency of the first to-be-compensated voltage, and the compensation phase angle The output voltage after voltage phase compensation is performed.
The method according to claim 1, wherein before the determining the compensation phase angle of the first voltage to be compensated according to the lag time length of the voltage filter and the angular frequency of the first voltage to be compensated comprises the following steps: :

collecting the first voltage to be compensated at a second preset time interval and recording the number of voltage collections;

If the third to-be-compensated voltage collected at the second moment is smaller than the initial bias voltage, and the fourth to-be-compensated voltage collected at the third moment is greater than the initial bias voltage, the recorded voltage corresponding to the third moment is collected The number of times is taken as the target voltage collection times, and the angular frequency of the first voltage to be compensated is determined according to the target voltage collection times and the second preset time interval, wherein the time between the second moment and the third moment is The time interval is the second preset time interval, and the second moment is before the third moment.
The method according to claim 3, wherein the second preset time interval is a voltage collection interval of each collection period;

If the third to-be-compensated voltage collected at the second moment is smaller than the initial bias voltage, and the fourth to-be-compensated voltage collected at the third moment is greater than the initial bias voltage, the third moment corresponds to the The recorded voltage acquisition times as the target voltage acquisition times include:

If the third to-be-compensated voltage collected at the second moment is smaller than the initial bias voltage, and the fourth to-be-compensated voltage collected at the third moment is greater than the initial bias voltage, the third The number of voltage acquisitions recorded corresponding to the time is taken as the number of voltage acquisitions in the current acquisition cycle, and the number of voltage acquisitions is cleared to record the number of voltage acquisitions in the next acquisition cycle;

The target voltage acquisition times are determined according to the voltage acquisition times in n acquisition cycles, where n is a positive integer greater than 1.
The method according to any one of claims 3-4, wherein the first AC voltage is output by an AC voltage source through a voltage bias circuit, and the voltage bias circuit is used to provide the initial bias voltage, so that the voltage value of the first AC voltage output by the AC voltage source is not less than zero.
The method according to claim 1, wherein determining the first voltage to be compensated according to the first voltage to be compensated, the angular frequency of the first voltage to be compensated, and the compensation phase angle The output voltage after voltage phase compensation is:

u ac1 =u ac .sin(wt+θ)

Wherein, t is the current time, u ac is the amplitude of the first voltage to be compensated, w is the angular frequency of the first voltage to be compensated, and θ is the compensation phase angle.
The method according to claim 2, wherein the angle according to the first voltage to be compensated, the second voltage to be compensated, the first preset time interval, and the first voltage to be compensated The frequency and the compensation phase angle determine the output voltage after the voltage phase compensation of the first voltage to be compensated is:

Wherein, t is the current time, u ac .sin(wt) is the first voltage to be compensated, u aclast is the second voltage to be compensated, T s is the first preset time interval, and w is the The angular frequency of the first voltage to be compensated, and θ is the compensation phase angle.
A voltage compensation device, characterized in that the voltage compensation device comprises:

an obtaining module, configured to obtain the first voltage to be compensated output after the first AC voltage at the current moment passes through the voltage filter;

A determination module, configured to determine the compensation phase angle of the first voltage to be compensated according to the delay time of the voltage filter and the angular frequency of the first voltage to be compensated, wherein the delay time of the voltage filter is determined by the Determine the capacitance value and resistance value of the voltage filter;

The determining module is further configured to determine, according to the first voltage to be compensated, the angular frequency of the first voltage to be compensated, and the compensation phase angle, the output voltage after voltage phase compensation is performed on the first voltage to be compensated .
A voltage compensation device, characterized in that the device comprises a transceiver, a processor, and a memory, wherein the processor is configured to execute a computer program stored in the memory to implement the method as claimed in any one of claims 1 to 7 steps of the method described.
A computer-readable storage medium, characterized in that, the readable storage medium stores instructions that, when executed on a computer, cause the computer to perform the steps of the method according to any one of claims 1 to 7 .