CN114172344B - PWM topology control method and device and power supply system - Google Patents
PWM topology control method and device and power supply system Download PDFInfo
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- CN114172344B CN114172344B CN202111329058.7A CN202111329058A CN114172344B CN 114172344 B CN114172344 B CN 114172344B CN 202111329058 A CN202111329058 A CN 202111329058A CN 114172344 B CN114172344 B CN 114172344B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
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Abstract
The invention provides a PWM topology control method, a device and a power supply system, wherein the method is applied to PWM topology in a power supply circuit, and the power supply circuit also comprises an LC filter circuit connected with an output end of the PWM topology; the PWM topology control method comprises the following steps: acquiring capacitor voltage, inductance current and output load current corresponding to the LC filter circuit; determining a current reference value based on the capacitor voltage, a preset voltage reference value, and the differential and output load current of the voltage reference value, and determining the input voltage of the LC filter circuit according to the current reference value, the inductor current, the differential and the capacitor voltage of the current reference value; and determining the pulse width modulation quantity of the PWM topology according to the input voltage of the LC filter circuit, and controlling the PWM topology based on the pulse width modulation quantity. The invention has good voltage tracking performance and anti-interference capability.
Description
Technical Field
The invention belongs to the technical field of PWM control circuits, and particularly relates to a PWM topology control method and device and a power supply system.
Background
PWM (Pulse Width Modulation ) topology is a common topology in a power supply circuit, and in order to ensure the stability of the circuit in which the PWM topology is located, the PWM topology needs to be controlled, and the control requirement is good voltage tracking performance and anti-interference capability.
In the prior art, control of the PWM topology is typically implemented based on PI (proportional integral) control. As shown in fig. 6, the conventional PI controller is composed of a voltage and current double closed loop control. The voltage reference value and the error value of the capacitor voltage form a voltage outer loop by adding an output load current feedforward as a current reference value through the PI controller; and then, the current reference value and the error value of the inductance current form a topology output control quantity through a PI controller and capacitor voltage feedforward to carry out modulation output, so that the topology output alternating voltage is controlled. However, in practical applications, it is difficult to implement the dead-end control of the given and feedback in the ac control due to the conventional PI controller. Therefore, it is difficult to achieve an ideal index in both the output waveform quality and the output dynamic index. In engineering, it is often necessary to additionally supplement other control loops, such as repetitive controllers, to increase the output parameter index, which increases the control cost.
Disclosure of Invention
The invention aims to provide a PWM topology control method, a PWM topology control device and a power supply system, so that voltage tracking performance and anti-interference capability of PWM topology control are improved on the basis of no additional control loop.
In order to achieve the above purpose, the technical scheme adopted by the invention is to provide a PWM topology control method, wherein the PWM topology control method is applied to PWM topology in a power supply circuit, and the power supply circuit further comprises an LC filter circuit connected with an output end of the PWM topology; the PWM topology control method comprises the following steps:
acquiring capacitor voltage, inductance current and output load current corresponding to the LC filter circuit;
determining a current reference value based on the capacitor voltage, a preset voltage reference value, and the differential of the voltage reference value and the output load current, and determining the input voltage of the LC filter circuit according to the current reference value, the inductor current, the differential of the current reference value and the capacitor voltage;
and determining the pulse width modulation quantity of the PWM topology according to the input voltage of the LC filter circuit, and controlling the PWM topology based on the pulse width modulation quantity.
In one possible implementation manner, the determining the current reference value based on the capacitor voltage, a preset voltage reference value, and a derivative of the voltage reference value, the output load current, includes:
determining a voltage error value based on the capacitor voltage and a preset voltage reference value, and inputting the voltage error value into a preset voltage loop controller to obtain a first reference value;
determining a capacitance current compensation value according to the differential of the voltage reference value;
and determining a current reference value based on the first reference value, the capacitance current compensation value, and the feedforward value with the output load current as the feedforward value.
In one possible implementation, the determining the current reference value based on the first reference value, the capacitance current compensation value, and the feedforward value includes:
and taking the sum of the first reference value, the capacitance current compensation value and the feedforward value as a current reference value.
In one possible implementation manner, the determining the input voltage of the LC filter circuit according to the current reference value, the inductor current, the derivative of the current reference value, and the capacitor voltage includes:
determining a current error value based on the current reference value and the inductance current, and inputting the current error value into a preset current loop controller to obtain a second reference value;
determining an inductance voltage compensation value according to the differentiation of the current reference value;
and determining the input voltage of the LC filter circuit based on the second reference value, the inductance voltage compensation value and the capacitance voltage.
In one possible implementation, before determining the input voltage of the LC filter circuit based on the second reference value and the inductance voltage compensation value, the capacitance voltage, the PWM topology control method further includes:
determining a voltage error value based on the capacitor voltage and a preset voltage reference value, and determining a harmonic compensation value according to the voltage error value;
correspondingly, the determining the input voltage of the LC filter circuit based on the second reference value, the inductance voltage compensation value, and the capacitance voltage includes:
and determining the input voltage of the LC filter circuit according to the harmonic compensation value, the second reference value, the inductance voltage compensation value and the capacitance voltage.
In one possible implementation manner, the determining the input voltage of the LC filter circuit according to the harmonic compensation value, the second reference value, the inductance voltage compensation value, and the capacitance voltage includes:
acquiring an inductance equivalent series resistance corresponding to the LC filter circuit, and determining a feedforward voltage according to the capacitor voltage, the inductance current and the inductance equivalent series resistance;
and taking the sum of the harmonic compensation value, the second reference value, the inductance voltage compensation value and the feedforward voltage as the input voltage of the LC filter circuit.
In one possible implementation manner, the determining the pulse width modulation amount of the PWM topology according to the input voltage of the LC filter circuit includes:
acquiring the direct current bus voltage of the power supply circuit;
and determining the pulse width modulation quantity of the PWM topology based on the input voltage of the LC filter circuit and the DC bus voltage.
In one possible implementation, controlling the PWM topology based on the pulse width modulation amount includes:
generating a PWM wave based on the pulse width modulation amount and outputting the PWM wave to the PWM topology.
In another aspect of the present invention, there is also provided a PWM topology control apparatus, including a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the PWM topology control method described above when executing the computer program.
In still another aspect of the present invention, there is also provided a power supply system including:
the power supply circuit described above and the PWM topology control apparatus described above, the PWM topology control apparatus being connected to a PWM topology in the power supply circuit.
The PWM topology control method and device and the power supply system provided by the invention have the beneficial effects that:
different from the scheme for realizing PWM topology control based on PI control in the prior art, the invention also calculates the differential of the voltage reference value and the differential of the current reference value, introduces the differential of the voltage reference value and the differential of the current reference value into the calculation of the input voltage of the LC filter circuit, further realizes the compensation of capacitance current through the differential of the voltage reference value and the compensation of inductance voltage through the differential of the current reference value, thereby reducing the influence of the capacitance current and the inductance voltage on the voltage tracking performance and improving the voltage tracking speed of PWM topology control. On the basis, when the power supply circuit is suddenly loaded, the invention can realize the rapid voltage stabilization, thereby improving the anti-interference performance of the whole power supply circuit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a PWM topology control method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a power supply circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a PWM topology control apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a power supply system according to an embodiment of the present invention;
FIG. 5 is a diagram of a PI control loop with an added compensation loop improvement according to one embodiment of the present invention;
FIG. 6 is a diagram of a conventional PI control loop according to one embodiment of the present invention;
fig. 7 is a first simulation diagram corresponding to a conventional PI control according to an embodiment of the present invention;
FIG. 8 is a first simulation diagram corresponding to PI control with increased compensation loop improvement according to one embodiment of the present invention;
FIG. 9 is a second simulation diagram corresponding to a conventional PI control according to one embodiment of the present invention;
FIG. 10 is a second simulation diagram corresponding to PI control with increased compensation loop improvement according to one embodiment of the present invention;
FIG. 11 is a third simulation diagram corresponding to a conventional PI control according to an embodiment of the present invention;
FIG. 12 is a third simulation diagram corresponding to PI control with increased compensation loop improvement according to one embodiment of the present invention;
FIG. 13 is a fourth simulation diagram corresponding to a conventional PI control according to one embodiment of the present invention;
FIG. 14 is a fourth simulation diagram corresponding to PI control with increased compensation loop improvement according to one embodiment of the present invention;
FIG. 15 is a fifth simulation diagram corresponding to the conventional PI control according to one embodiment of the present invention;
FIG. 16 is a fifth simulation diagram corresponding to PI control with increased compensation loop improvement according to one embodiment of the present invention;
FIG. 17 is a sixth simulation diagram corresponding to the conventional PI control according to one embodiment of the present invention;
fig. 18 is a sixth simulation diagram corresponding to PI control with an added compensation loop improvement according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention will be described in further detail with reference to the drawings and the detailed description.
The technical scheme adopted by the invention is to provide a PWM topology control method, wherein the PWM topology control method is applied to PWM topology in a power supply circuit, the structure of the power supply circuit can be referred to as figure 2, the power supply circuit also comprises an LC filter circuit connected with the output end of the PWM topology as shown in figure 2, and in figure 2, U is as follows in Is the input voltage of the LC filter circuit, i L (t) is inductor current, U c (t) is capacitance voltage, L is inductance, C is capacitance, i o The output load current of the LC filter circuit. The PWM topology described in the embodiments of the present invention may be a single-phase T-type three-level inversion topology, a single-phase I-type three-level inversion topology, or the like.
Referring to fig. 1, fig. 1 is a flowchart of a PWM topology control method according to an embodiment of the present invention, where the PWM topology control method includes:
s101: and acquiring capacitance voltage, inductance current and output load current corresponding to the LC filter circuit.
In this embodiment, the capacitor voltage, the inductor current, and the output load current of the LC filter circuit may be collected by the data collecting device for subsequent control. Among them, data acquisition devices include, but are not limited to, voltage sensors, current sensors, and the like.
S102: the method comprises the steps of determining a current reference value based on a capacitor voltage, a preset voltage reference value, and differentiation and output load current of the voltage reference value, and determining the input voltage of the LC filter circuit according to the current reference value, the inductor current, the differentiation and the capacitor voltage of the current reference value.
In this embodiment, the first reference value may be determined based on the capacitor voltage and a preset voltage reference value, the capacitor current compensation value may be determined based on the derivative of the voltage reference value, and the final current reference value may be determined based on the first reference value, the capacitor current compensation value, and the output load current.
In this embodiment, the second reference value may be determined according to the current reference value and the inductor current, the inductor voltage compensation value may be determined based on the derivative of the current reference value, and the final LC filter input voltage may be determined according to the second reference value, the inductor voltage compensation value, and the capacitor voltage.
S103: and determining the pulse width modulation quantity of the PWM topology according to the input voltage of the LC filter circuit, and controlling the PWM topology based on the pulse width modulation quantity.
In one possible implementation, determining an amount of pulse width modulation of a PWM topology from an input voltage of an LC filter circuit includes:
and acquiring the direct current bus voltage of the power supply circuit, and determining the pulse width modulation quantity of the PWM topology based on the input voltage of the LC filter circuit and the direct current bus voltage.
Wherein can pass through
Calculating a pulse width modulation amount of a PWM topology, wherein U dc The dc bus voltage is the above dc bus voltage.
In one possible implementation, controlling the PWM topology based on the amount of pulse width modulation includes:
generating a PWM wave based on the pulse width modulation amount and outputting the PWM wave to a PWM topology.
Different from the scheme for realizing PWM topology control directly based on PI control in the prior art, the embodiment of the invention also calculates the differential of the voltage reference value and the differential of the current reference value, introduces the differential of the voltage reference value and the differential of the current reference value into the calculation of the input voltage of the LC filter circuit, further realizes the compensation of capacitance current through the differential of the voltage reference value and the compensation of inductance voltage through the differential of the current reference value, thereby reducing the influence of the capacitance current and the inductance voltage on the voltage tracking performance and improving the voltage tracking speed of PWM topology control. On the basis, when the power supply circuit is suddenly loaded, the embodiment of the invention can realize the rapid voltage stabilization, thereby improving the anti-interference performance of the whole power supply circuit.
In one possible implementation, determining the current reference value based on the capacitor voltage, the preset voltage reference value, and the differential of the voltage reference value, the output load current, includes:
and determining a voltage error value based on the capacitor voltage and a preset voltage reference value, and inputting the voltage error value into a preset voltage loop controller to obtain a first reference value.
The capacitance current compensation value is determined according to the differentiation of the voltage reference value.
And taking the output load current as a feedforward value, and determining a current reference value based on the first reference value, the capacitance current compensation value and the feedforward value.
In this embodiment, a difference between the preset voltage reference value and the capacitor voltage is used as a voltage error value, and the voltage error value is input into the preset voltage loop controller to obtain the first reference value.
In the present embodiment, the voltage reference value can be differentiated (i.e
) Equivalent to capacitance current compensation value, wherein K 1 Is a first preset coefficient.
In one possible implementation, the sum of the first reference value, the capacitance current compensation value, and the feedforward value may be used as the current reference value.
In one possible implementation, determining the input voltage of the LC filter circuit according to the current reference value, the inductor current, the derivative of the current reference value, and the capacitor voltage includes:
and determining a current error value based on the current reference value and the inductance current, and inputting the current error value into a preset current loop controller to obtain a second reference value.
The inductance voltage compensation value is determined according to the differentiation of the current reference value.
The input voltage of the LC filter circuit is determined based on the second reference value, the inductance voltage compensation value, and the capacitance voltage.
In this embodiment, the difference between the current reference value and the inductor current may be used as a current error value, and the current error value may be input to a preset current loop controller to obtain the second reference value.
In the present embodiment, the current reference value can be differentiated (i.e.
) Equivalent to inductance voltage compensation value, wherein K 2 Is a second preset coefficient.
In one possible implementation, before determining the input voltage of the LC filter circuit based on the second reference value, the inductance voltage compensation value, and the capacitance voltage, the PWM topology control method further includes:
and determining a voltage error value based on the capacitor voltage and a preset voltage reference value, and determining a harmonic compensation value according to the voltage error value.
Accordingly, determining the input voltage of the LC filter circuit based on the second reference value, the inductance voltage compensation value, and the capacitance voltage, includes:
and determining the input voltage of the LC filter circuit according to the harmonic compensation value, the second reference value, the inductance voltage compensation value and the capacitance voltage.
In this embodiment, the voltage error value includes harmonics, so that a harmonic compensation value can be determined according to the voltage error value, and then an input voltage of the LC filter circuit is determined according to the harmonic compensation value, the second reference value, the inductance voltage compensation value, and the capacitance voltage, so as to implement harmonic compensation, and further improve dynamic performance.
Wherein, can pass delta multiplied by K 3 Calculating harmonic compensation value, wherein delta is current error value, K 3 Is a third predetermined coefficient determined from the capacitance and inductance.
In one possible implementation, determining the input voltage of the LC filter circuit from the harmonic compensation value, the second reference value, and the inductor voltage compensation value includes:
and obtaining an inductance equivalent series resistance corresponding to the LC filter circuit, and determining the feedforward voltage according to the capacitance voltage, the inductance current and the inductance equivalent series resistance.
And taking the sum of the harmonic compensation value, the second reference value, the inductance voltage compensation value and the feedforward voltage as the input voltage of the LC filter circuit.
In the present embodiment, it can be according to U c (t)+r×i L (t) determining a feedforward voltage, wherein r is an inductance equivalent series resistance.
As a specific implementation manner provided by the embodiment of the invention, reference may be made to FIG. 5, where x is in FIG. 5 1d Is a preset voltage reference value, x 1 ＝U c (t)，x 2d Is the current reference value, x 2 ＝i L (t), e is a voltage error value, and δ is a current error value. As shown in FIG. 5, can be based on the voltage reference value x 1d And capacitance voltage x 1 Determining a voltage error value e, further determining a first reference value, differentiating the voltage reference value and determining a voltage reference value x 1d Determining capacitance current compensation value, and finally combining output load current i of LC filter circuit o Determining a current reference value x 2d . Then according to the current reference value x 2d Inductor current x 2 Determining a current error value delta, further determining a second reference value, and determining a differential of the current reference value and a current reference value x 2d Determination ofThe inductance voltage compensation value is finally combined with the feedforward voltage x 1 +r×x 2 The input voltage U of the LC filter circuit can be obtained in According to the input voltage U in DC bus voltage U dc And determining the pulse width adjustment quantity, and finally generating PWM waves to realize PWM topology control.
In this embodiment, reference may be made to fig. 6 (fig. 6 is a conventional PI control, where the parameter meaning is the same as that of fig. 5), and comparing the two, it can be seen that, compared with a complex repetitive controller, the embodiment of the present invention effectively implements output and given no-static-difference control through three simpler compensation control loops, thereby improving the output index of the conventional PI control loop. The three compensation loops are: firstly, aiming at the characteristics of a capacitor and an inductance device in PWM topology, carrying out capacitance current compensation on an inductance current given (namely a current reference value); secondly, compensating the inductance voltage by carrying out inductance voltage on the output alternating current modulation voltage; thirdly, adding errors of capacitor voltage in the forward channel to carry out harmonic compensation. The voltage tracking performance and the anti-interference capability of the device are further improved by simple loop compensation.
On the basis of the scheme of the embodiment of the invention, the invention also carries out simulation verification, and the result is as follows:
in terms of rapidity, reference may be made to fig. 7 and 8 together, and fig. 7 shows that in a comparative experiment, the convergence of the effective value of the conventional PI control is slow, and about 0.08s is required to output a waveform meeting the requirement during starting, whereas in the scheme provided by the embodiment of the invention in fig. 8, the control value is directly given, no effective value ring exists, and the convergence is fast. The upper sinusoidal waveform can be tracked at start-up. In terms of rapidity, reference is also made to fig. 9 and 10, where fig. 9 shows that the THDV can be stabilized within 1% only when the conventional PI control needs to be performed for 0.8s, and that the THDV can be satisfied within 1% when the second cycle of the scheme provided by the embodiment of the present invention in fig. 10, i.e., 0.02s (where the red part of fig. 9 and 10 refers to the circled part).
In terms of accuracy, fig. 11 and fig. 12 may be referred to together, and fig. 11 shows that the conventional PI control effective value loop converges slowly, and a long time is required to output a waveform meeting the requirement, whereas fig. 12 directly gives a control value, and there is no effective value loop, so that the convergence is fast. The upper sinusoidal waveform can be tracked at start-up. In terms of accuracy, reference may also be made to fig. 13 and 14 together, fig. 13 showing that the output voltage and the setting corresponding to the PI control fluctuate from-6V to 6V in the conventional PI control, and the error range jitters between-3V and 3V in the output voltage and the setting corresponding to the scheme of the present invention in fig. 14, starting from 0.8 s.
In terms of stability, reference may be made to fig. 15 and 16 together, and fig. 15 shows that at 0.2s, when the RCD load is suddenly applied, the conventional PI control waveform is partially distorted, and the peak is shaved. While in the scheme of the invention shown in fig. 16, the RCD load is suddenly applied at 0.2s, and the waveform is basically undistorted. In terms of stability, reference is also made to fig. 17 and 18, where fig. 17 shows that the traditional PI control is 3.64% THDV under RCD load and that the inventive solution in fig. 18 is 0.64% THDV under RCD load.
In summary, the scheme of the embodiment of the invention is superior to the traditional PI control scheme in terms of rapidness, accuracy and stability.
In another aspect of the present invention, there is also provided a PWM topology control apparatus 300, including: 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 via a communication bus 305. The memory 304 is used to store a computer program comprising program instructions. The processor 301 is configured to execute program instructions stored in the memory 304. Wherein the processor 301 is configured to invoke program instructions to perform the steps of the method embodiments described above. It should be appreciated that in embodiments of the present invention, the processor 301 may be a central processing unit (CentralProcessingUnit, CPU). The processor may also be other general purpose processors, digital signal processors (DigitalSignalProcessor, DSP), application specific integrated circuits (ApplicationSpecificIntegratedCircuit, ASIC), off-the-shelf programmable gate arrays (Field-ProgrammableGateArray, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The input device 302 may include a touch pad, a fingerprint sensor (for collecting fingerprint information of a user and direction information of a fingerprint), a microphone, etc., and the output device 303 may include a display (LCD, etc.), a speaker, etc. The memory 304 may include read only memory and random access memory and provides instructions and data to the processor 301. A portion of memory 304 may also include non-volatile random access memory. For example, the memory 304 may also store information of device type. In a specific implementation, the processor 301, the input device 302, and the output device 303 described in the embodiments of the present invention may perform the implementations described in the first embodiment and the second embodiment of the PWM topology control method provided in the embodiments of the present invention.
Referring to fig. 4, in still another aspect of the present invention, there is further provided a power supply system 40, including:
the power supply circuit described above and the PWM topology control apparatus described above are connected to the PWM topology in the power supply circuit.
The present invention is not limited to the above embodiments, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and these modifications and substitutions are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. The PWM topology control method is characterized by being applied to PWM topology in a power supply circuit, and the power supply circuit further comprises an LC filter circuit connected with the output end of the PWM topology; the PWM topology control method comprises the following steps:
acquiring capacitor voltage, inductance current and output load current corresponding to the LC filter circuit;
determining a first reference value based on the capacitor voltage and a preset voltage reference value, determining a capacitor current compensation value based on the differential of the voltage reference value, and determining a current reference value according to the first reference value, the capacitor current compensation value and the output load current;
determining a second reference value according to the current reference value and the inductance current, determining an inductance voltage compensation value based on the differentiation of the current reference value, and determining the input voltage of the LC filter circuit according to the second reference value, the inductance voltage compensation value and the capacitance voltage;
and determining the pulse width modulation quantity of the PWM topology according to the input voltage of the LC filter circuit, and controlling the PWM topology based on the pulse width modulation quantity.
2. The PWM topology control method of claim 1, wherein said determining a first reference value based on said capacitor voltage, a preset voltage reference value, comprises:
determining a voltage error value based on the capacitor voltage and a preset voltage reference value, and inputting the voltage error value into a preset voltage loop controller to obtain a first reference value;
the determining a current reference value according to the first reference value, the capacitance current compensation value, and the output load current includes:
and determining a current reference value based on the first reference value, the capacitance current compensation value, and the feedforward value with the output load current as the feedforward value.
3. The PWM topology control method of claim 2, wherein said determining a current reference value based on said first reference value, said capacitive current compensation value, and said feedforward value, comprises:
and taking the sum of the first reference value, the capacitance current compensation value and the feedforward value as a current reference value.
4. The PWM topology control method of claim 1, wherein said determining a second reference value from said current reference value and said inductor current comprises:
and determining a current error value based on the current reference value and the inductance current, and inputting the current error value into a preset current loop controller to obtain a second reference value.
5. The PWM topology control method of claim 1, wherein prior to determining the input voltage of said LC filter circuit based on said second reference value, said inductor voltage compensation value, said capacitor voltage, said PWM topology control method further comprises:
determining a voltage error value based on the capacitor voltage and a preset voltage reference value, and determining a harmonic compensation value according to the voltage error value;
correspondingly, the determining the input voltage of the LC filter circuit based on the second reference value, the inductance voltage compensation value, and the capacitance voltage includes:
and determining the input voltage of the LC filter circuit according to the harmonic compensation value, the second reference value, the inductance voltage compensation value and the capacitance voltage.
6. The PWM topology control method of claim 5, wherein said determining an input voltage of said LC filter circuit from said harmonic compensation value, said second reference value, said inductor voltage compensation value, said capacitor voltage, comprises:
acquiring an inductance equivalent series resistance corresponding to the LC filter circuit, and determining a feedforward voltage according to the capacitor voltage, the inductance current and the inductance equivalent series resistance;
and taking the sum of the harmonic compensation value, the second reference value, the inductance voltage compensation value and the feedforward voltage as the input voltage of the LC filter circuit.
7. The PWM topology control method of any one of claims 1 to 6, wherein said determining an amount of pulse width modulation of said PWM topology from an input voltage of said LC filter circuit comprises:
acquiring the direct current bus voltage of the power supply circuit;
and determining the pulse width modulation quantity of the PWM topology based on the input voltage of the LC filter circuit and the DC bus voltage.
8. The PWM topology control method of any one of claims 1 to 6, wherein controlling the PWM topology based on the pulse width modulation amount comprises:
generating a PWM wave based on the pulse width modulation amount and outputting the PWM wave to the PWM topology.
9. A PWM topology control apparatus comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any one of claims 1 to 8 when executing the computer program.
10. A power supply system, comprising: a power supply circuit as applied in claim 1 and a PWM topology control apparatus as claimed in claim 9, said PWM topology control apparatus being connected to a PWM topology in said power supply circuit.
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| CN104022508A (en) * | 2014-05-26 | 2014-09-03 | 中南大学 | Three-phase four-switch active electric power filter and control method thereof |
| CN105006825A (en) * | 2015-06-04 | 2015-10-28 | 广西电网有限责任公司电力科学研究院 | Power electronic transformer enabling high quality of electric energy output, and control method thereof |
| CN107204630A (en) * | 2017-06-09 | 2017-09-26 | 湖南大学 | Have the island NPC type power supply high-accuracy control methods of fast dynamic response concurrently |
| WO2018024911A1 (en) * | 2016-08-05 | 2018-02-08 | Rohm Powervation Limited | A power supply controller |
| JP2018113779A (en) * | 2017-01-11 | 2018-07-19 | 住友電気工業株式会社 | Power conversion device and harmonic restraint method |
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| US11017942B2 (en) * | 2018-11-01 | 2021-05-25 | Witricity Corporation | Systems and methods for determining coil current in wireless power systems |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104022508A (en) * | 2014-05-26 | 2014-09-03 | 中南大学 | Three-phase four-switch active electric power filter and control method thereof |
| CN105006825A (en) * | 2015-06-04 | 2015-10-28 | 广西电网有限责任公司电力科学研究院 | Power electronic transformer enabling high quality of electric energy output, and control method thereof |
| WO2018024911A1 (en) * | 2016-08-05 | 2018-02-08 | Rohm Powervation Limited | A power supply controller |
| JP2018113779A (en) * | 2017-01-11 | 2018-07-19 | 住友電気工業株式会社 | Power conversion device and harmonic restraint method |
| CN107204630A (en) * | 2017-06-09 | 2017-09-26 | 湖南大学 | Have the island NPC type power supply high-accuracy control methods of fast dynamic response concurrently |
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