Rectifier power supply control method and rectifier power supply

Abstract

The application relates to the field of power electronics, and discloses a rectifier power supply control method and a rectifier power supply, which comprise the following steps: S1, collecting operation data, collecting input voltage, input current, output voltage and output current of the rectifier power supply; S2, constructing a comprehensive quantity, constructing a performance evaluation quantity for representing the operation state of the rectifier power supply based on the real-time operation parameters; S3, parameter identification and updating, performing online parameter identification on the operation model of the rectifier power supply; S4, control mode determination; S5, generating a driving signal; and S6, updating the comprehensive quantity. The comprehensive performance evaluation quantity for representing the operation state of the rectifier power supply is constructed, the characteristics of the input side, the power conversion process and the output side are quantified, the evaluation parameters are updated according to the real-time operation data in the operation process, the evaluation results can reflect the current working condition, and the rectifier power supply can continuously complete control calculation according to the actual operation characteristics.

Description

Technical Field

[0001] This invention relates to the field of power electronics technology, specifically to a rectifier power supply control method and a rectifier power supply. Background Technology

[0002] A rectifier power supply is a type of power electronic device that converts input AC power into DC power. It is widely used in communication equipment, power modules, industrial control equipment, etc. As the application requirements of rectifier power supplies in variable load scenarios, complex power grid environments, and high-frequency operating conditions continue to increase, rectifier power supplies usually need to have multiple operating status monitoring capabilities in order to accurately reflect the operating characteristics of the input side, the power conversion process, and the output side during operation, thereby providing a basis for subsequent mode adjustment and control strategy selection. Currently, rectifier power supplies are generally controlled by fixed control parameters and preset state judgment methods.

[0003] However, in current technologies, the operating status is mostly evaluated based on local characteristic quantities, lacking a unified quantitative description of the operating characteristics of the input side, the power conversion process, and the output side. Furthermore, the state quantities used for control judgment are not updated according to real-time operating conditions, resulting in the operating status information used in the control process not being consistent with the actual operating conditions, making it difficult for the control mode to match the current operating status in a timely manner. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a rectifier power supply control method and a rectifier power supply, solving the problem that it is difficult to uniformly quantify and characterize the rectifier power supply based on its real-time operating status, resulting in the control mode being difficult to match the current operating conditions in a timely manner.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a rectifier power supply control method, comprising:

[0006] S1. Data acquisition during operation: Acquire the input voltage, input current, output voltage, and output current of the rectifier power supply to obtain real-time operating parameters for control.

[0007] S2. Construction of comprehensive quantities: Based on the real-time operating parameters, construct performance evaluation quantities to characterize the operating status of the rectifier power supply. The performance evaluation quantities are used to characterize the operating characteristics of the input side, the power conversion process, and the output side.

[0008] S3. Parameter identification and updating: Online parameter identification is performed on the operating model of the rectifier power supply, and the control parameters of the rectifier power supply and the relevant parameters in the performance evaluation quantity are updated based on the identification results.

[0009] S4. Control mode determination: Determine the control mode of the rectifier power supply based on the comprehensive performance evaluation quantity, and determine the target control mode from multiple preset control modes.

[0010] S5. Drive signal generation: Generate drive signals for the power switching devices according to the target control mode, and control the power switching devices of the rectifier power supply based on the drive signals.

[0011] S6. Comprehensive quantity update: Input the operating data of the rectifier power supply under the target control mode into the construction process of the comprehensive performance evaluation quantity, and update the comprehensive performance evaluation quantity based on the obtained data.

[0012] Preferably, the operational data acquisition includes:

[0013] By connecting the voltage sampling circuit and the current sampling circuit to the input side of the rectifier power supply, the input voltage and input current are sampled in analog form to obtain the input side sampling signal;

[0014] By connecting the voltage sampling circuit and the current sampling circuit to the output side of the rectifier power supply, the output voltage and output current are sampled in analog form to obtain the output side sampling signal.

[0015] The input-side sampling signal and the output-side sampling signal are input to the analog-to-digital conversion circuit to obtain the corresponding digital operating parameters. The digital operating parameters are then calibrated based on preset calibration coefficients, and the operating parameters are output.

[0016] Preferably, the construction of the comprehensive quantity includes:

[0017] Electrical characteristic quantities are calculated based on the real-time operating parameters. These electrical characteristic quantities include output voltage deviation, fundamental component of input current, and harmonic component of input current.

[0018] The loss estimate of the power switching device is calculated using the real-time operating parameters.

[0019] The voltage and current change rates generated during the switching process are calculated based on the real-time operating parameters, and the performance evaluation quantity is constructed based on the electrical characteristic quantity, the loss estimate, and the voltage and current change rates.

[0020] Preferably, the comprehensive quantity construction step further includes:

[0021] Set corresponding parameter values ​​for the electrical characteristic quantity, the loss estimation quantity, and the voltage change rate and current change rate, respectively;

[0022] Based on the parameter quantities, the electrical characteristic quantities, the loss estimation quantities, and the voltage change rate and current change rate are combined and calculated to form the performance evaluation quantities;

[0023] The parameter is set as an updatable parameter, which is used to update the performance evaluation quantity based on the operating data of the rectifier power supply in subsequent steps.

[0024] Preferably, the parameter identification and updating includes:

[0025] A model describing the operating characteristics of the rectifier power supply is established based on the aforementioned real-time operating parameters;

[0026] Based on the model, the operating model parameters of the rectifier power supply are identified online to obtain the identified parameter quantity;

[0027] The control parameters of the rectifier power supply and the parameters in the performance evaluation quantity are updated based on the identified parameter quantities.

[0028] Preferably, the identified parameters include parameters describing the input-side characteristics of the rectified power supply, parameters during the power conversion process, and parameters describing the output-side characteristics.

[0029] Preferably, the control mode determination includes:

[0030] Establish corresponding mode calculation expressions for multiple preset control modes, and the mode calculation expressions are used to receive the parameter quantities in the performance evaluation quantities;

[0031] A mode value is calculated for each preset control mode based on the mode calculation expression. The mode value is used to characterize the applicability of the preset control mode in the current operating state.

[0032] The target control mode is determined based on the comparison results of the mode values.

[0033] Preferably, the plurality of preset control modes include continuous conduction mode, critical conduction mode, intermittent conduction mode and valley opening mode.

[0034] Preferably, the comprehensive quantity update includes:

[0035] The parameters in the performance evaluation quantity are updated based on the operating data of the rectified power supply under the target control mode;

[0036] The updated parameter values ​​are input into the next performance evaluation value construction process to generate new performance evaluation values, and the comprehensive value update process is repeated during the continuous operation of the rectifier power supply.

[0037] A rectifier power supply, the power supply comprising:

[0038] The data acquisition module is run to collect the input voltage, input current, output voltage, and output current of the rectifier power supply, and generate real-time operating parameters for control.

[0039] The performance evaluation construction module constructs a performance evaluation quantity based on the real-time operating parameters to characterize the operating status of the rectifier power supply. The performance evaluation quantity is used to characterize the operating characteristics of the input side, the power conversion process, and the output side.

[0040] The parameter identification and update module performs online parameter identification on the operating model of the rectifier power supply, and updates the control parameters of the rectifier power supply and the parameter quantities in the performance evaluation quantity based on the identification results.

[0041] The control mode determination module determines the target control mode from multiple preset control modes based on the performance evaluation parameters.

[0042] The drive signal generation module generates drive signals for the power switching device according to the target control mode;

[0043] The performance evaluation update module updates the parameters in the performance evaluation quantity based on the operating data of the rectifier power supply under the target control mode, and inputs the updated parameters into the construction process of the next performance evaluation quantity.

[0044] This invention provides a rectifier power supply control method and a rectifier power supply. It has the following beneficial effects:

[0045] 1. This invention constructs a comprehensive performance evaluation quantity to characterize the operating state of a rectifier power supply, unifies and quantifies the characteristics of the input side, the power conversion process, and the output side, and updates the evaluation parameters based on real-time operating data during operation, ensuring that the evaluation results can reflect the current operating conditions and that the rectifier power supply can continuously complete control calculations according to the actual operating characteristics.

[0046] 2. This invention identifies parameters in the rectifier power supply operation model online, obtains operating characteristic parameters of the input side, power conversion process and output side, and updates the parameters in the control parameters and performance evaluation quantities accordingly, ensuring that the rectifier power supply maintains control characteristics that match the actual operating state under different operating conditions, and improving the adaptability of the control process.

[0047] 3. This invention quantifies and evaluates continuous conduction mode, critical conduction mode, intermittent conduction mode and valley turn-on mode based on performance evaluation metrics, and determines the target control mode from them. This enables the rectifier power supply to select the appropriate operating mode according to the operating state. By comparing multiple control modes, the rectifier power supply has the ability to flexibly switch modes under different operating conditions. Attached Figure Description

[0048] Figure 1 This is a flowchart of a rectifier power supply control method according to the present invention;

[0049] Figure 2 This is a diagram of a rectifier power supply architecture according to the present invention. Detailed Implementation

[0050] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] Example 1, please refer to the appendix. Figure 1 This invention provides a rectifier power supply control method, comprising:

[0052] S1. Data acquisition during operation: Acquire the input voltage, input current, output voltage, and output current of the rectifier power supply to obtain real-time operating parameters for control.

[0053] Furthermore, operational data collection includes:

[0054] By connecting the voltage sampling circuit and the current sampling circuit to the input side of the rectifier power supply, the input voltage and input current are sampled in analog form to obtain the input side sampling signal;

[0055] By connecting the voltage sampling circuit and the current sampling circuit to the output side of the rectifier power supply, the output voltage and output current are sampled in analog form to obtain the output side sampling signal.

[0056] The input-side sampling signal and the output-side sampling signal are input to the analog-to-digital conversion circuit to obtain the corresponding digital operating parameters. The digital operating parameters are then calibrated based on preset calibration coefficients, and the operating parameters are output.

[0057] Specifically, operational data can be acquired through voltage sampling circuits and current sampling circuits set on the input and output sides of the rectifier power supply. That is, the voltage sampling circuit and current sampling circuit on the input side simulate sampling the input voltage and input current respectively to obtain the input side sampling signal, and the voltage sampling circuit and current sampling circuit on the output side simulate sampling the output voltage and output current respectively to obtain the output side sampling signal.

[0058] Simultaneously, the input-side sampling signal and the output-side sampling signal can be sent to the analog-to-digital converter circuit. The analog-to-digital converter circuit generates corresponding digital operation parameters according to the preset sampling resolution and sampling timing, and performs calibration processing according to the preset calibration coefficients, so that it can correspond to the magnitude of the input voltage, input current, output voltage, and output current.

[0059] In one example implementation, the rectifier power supply periodically acquires the aforementioned digital operating parameters during operation and uses them as operating data for subsequent performance evaluation quantity construction, operating model parameter identification, and control mode determination.

[0060] S2. Comprehensive quantity construction: Based on real-time operating parameters, a performance evaluation quantity is constructed to characterize the operating status of the rectifier power supply. The performance evaluation quantity is used to characterize the operating characteristics of the input side, the power conversion process, and the output side.

[0061] Furthermore, the comprehensive quantity construction includes:

[0062] Electrical characteristics are calculated based on real-time operating parameters. These electrical characteristics include output voltage deviation, fundamental component of input current, and harmonic component of input current.

[0063] Loss estimates of power switching devices are calculated using real-time operating parameters;

[0064] The voltage and current change rates generated during the switching process are calculated based on real-time operating parameters, and performance evaluation quantities are constructed based on electrical characteristic quantities, loss estimates, and voltage and current change rates.

[0065] The comprehensive quantity construction steps also include:

[0066] Set corresponding parameters for electrical characteristic quantities, loss estimation quantities, voltage change rate, and current change rate, respectively;

[0067] Based on the parameter quantities, electrical characteristic quantities, loss estimation quantities, voltage change rate and current change rate are combined and calculated to form performance evaluation quantities;

[0068] The parameters are set as updatable parameters, which are used to update the performance evaluation parameters based on the operating data of the rectifier power supply in subsequent steps.

[0069] Specifically, firstly, electrical characteristic quantities are calculated based on real-time operating parameters. The output voltage deviation can be obtained from the difference between the real-time output voltage and the preset output voltage. The fundamental and harmonic components of the input current can be decomposed based on the periodic sampling data of the input current through frequency domain analysis, so that the voltage and current relationship of the rectifier power supply input side under the current operating state can be quantitatively represented.

[0070] Furthermore, the loss estimates of the power switching devices are calculated based on real-time operating parameters. These loss estimates can include switching losses and conduction losses. Switching losses can be calculated from the voltage, current, and turn-on time constant at the moment of turn-on, while conduction losses can be calculated from the conduction current and the device's on-resistance. The switching losses can be determined according to the following formula: ;

[0071] in, Indicates the switching loss. Indicates the switching cycle. Indicates the duration of the switching transient. This represents the voltage during the switching transient. It represents the current during switching transients, thus allowing for the quantification of device loss levels under current operating conditions;

[0072] Subsequently, the voltage and current change rates generated during the switching process can be calculated based on real-time operating parameters. The voltage change rate can be obtained by the ratio of the transient voltage change to the corresponding change time, and the current change rate can be obtained by the ratio of the transient current change to the corresponding change time. For example, if the voltage is at a certain level during a single switching process... From within the time period Change to Then the rate of change of voltage can be expressed as The rate of change of current can be determined in the same way. By calculating the rate of change of voltage and the rate of change of current, the voltage and current change characteristics of the rectified power supply during the switching transient can be quantified.

[0073] After completing the calculation of electrical characteristic quantities, loss estimation quantities, voltage change rate, and current change rate, performance evaluation quantities can be constructed based on the above parameters. The loss estimation quantities, voltage change rate, and current change rate are calculated according to a preset parameter combination method. The parameter combination method can include weighted summation, nonlinear function combination, or other mathematical combination methods used to reflect the operating status of the rectifier power supply.

[0074] S3. Parameter identification and updating: Online parameter identification is performed on the operating model of the rectifier power supply, and the control parameters and related parameters in the performance evaluation are updated based on the identification results.

[0075] Parameter identification and updating include:

[0076] A model is established based on real-time operating parameters to describe the operating characteristics of the rectifier power supply;

[0077] Based on the model, the operating model parameters of the rectifier power supply are identified online to obtain the identified parameter quantity;

[0078] Among them, the identified parameters include parameters used to describe the characteristics of the rectifier power supply input side, parameters in the power conversion process, and parameters of the output side characteristics.

[0079] The control parameters of the rectifier power supply and the parameters in the performance evaluation are updated based on the identified parameters.

[0080] Specifically, firstly, a model is established based on real-time operating parameters to describe the operating characteristics of the rectifier power supply. This model can be represented by equivalent representation of the relationship between input voltage, input current, output voltage, and output current, and can be used to reflect the overall operating characteristics of the rectifier power supply on the input side, the energy conversion process, and the output side, providing a mathematical basis for subsequent online parameter identification.

[0081] Based on this, the operating model parameters of the rectifier power supply are identified online. During the online identification process, a recursive update method can be used to adjust the model parameters, so that the model output gradually approaches the real-time operating parameters. Specifically, a certain model parameter can be updated according to the following relationship:

[0082] ;

[0083] in, These are the values ​​of the model parameters under the current control cycle. These are the updated model parameter values. This represents the deviation between the model output and the real-time operating parameters within the current control cycle. The preset update coefficients are used to recursively update the model parameters online during the continuous operation of the rectifier power supply, so that the model can reflect the current operating status under different operating conditions.

[0084] The parameters obtained through the online identification process can be used as identification parameters to describe the input-side characteristics, energy conversion process characteristics, and output-side characteristics of the rectifier power supply. For example, under actual operating conditions, online identification yields parameters that characterize the equivalent inductance and equivalent impedance characteristics of the input side, parameters that characterize the energy conversion gain and dynamic response characteristics, and parameters that characterize the output voltage, current, and filtering characteristics. The identification parameters characterize the operating characteristics of the rectifier power supply from three aspects: the input side, the energy conversion process, and the output side.

[0085] After obtaining the identification parameters, the control parameters and performance evaluation parameters of the rectifier power supply are updated according to the identification results. The control parameters can be adjusted according to the currently identified operating characteristics, so that subsequent control calculations are performed under the new parameter conditions. For example, when the identification results show that the equivalent characteristics of the input side have changed, the control parameters related to the input side can be adjusted according to the updated identification parameters, so that the calculation of the reference current and the construction of the performance evaluation parameters are based on the updated operating characteristics, thereby ensuring that the parameters used in the subsequent control mode determination and drive signal generation steps are consistent with the actual operating state of the rectifier power supply.

[0086] S4. Control mode determination: Determine the control mode of the rectifier power supply based on the comprehensive performance evaluation quantity, and select the target control mode from multiple preset control modes.

[0087] Furthermore, the control mode determination includes:

[0088] Establish corresponding mode calculation expressions for multiple preset control modes. The mode calculation expressions are used to receive parameter quantities in the performance evaluation quantities.

[0089] Among them, multiple preset control modes include continuous conduction mode, critical conduction mode, intermittent conduction mode and valley opening mode;

[0090] The mode value is calculated for each preset control mode based on the mode calculation expression. The mode value is used to characterize the applicability of the preset control mode in the current operating state.

[0091] The target control mode is determined based on the comparison results of the mode values.

[0092] Specifically, firstly, corresponding mode calculation expressions are established for multiple preset control modes. The mode calculation expression can be a mathematical function with the number of parameters in the performance evaluation quantities as independent variables, used to output a mode value representing the applicability of the control mode. For example, the output voltage deviation, parameters reflecting input current harmonics in electrical characteristics, the estimated loss of power switching devices, and the switching stress determined by the voltage change rate and current change rate can be selected as independent variables. These parameters are input into the corresponding mode calculation expression. For the i-th control mode, its mode calculation expression can be expressed as:

[0093] ;

[0094] in, Indicates the first The mode value of each control mode. This indicates the output voltage deviation. This represents the parameter used to characterize the harmonics of the input current. This represents the estimated loss of power switching devices. This represents the switching stress determined by the rate of change of voltage and the rate of change of current. , , , These are pre-defined coefficients. By setting different coefficients for different control modes, the mode calculation expressions corresponding to each control mode can have different weights for different parameter quantities.

[0095] For each control mode, a separate set of coefficients can be defined in the mode calculation expression. This allows the continuous conduction mode to focus more on loss parameters related to high-power operation, the intermittent conduction mode to focus more on current waveform characteristics under low load conditions, and the valley-turn-on mode to focus more on switching stress, etc. In this way, a corresponding mode calculation expression can be provided for each control mode based on a unified performance evaluation metric.

[0096] During operation, mode values ​​can be calculated for each preset control mode based on mode calculation expressions. That is, within a control cycle, the output voltage deviation, parameters used to characterize input current harmonics, loss estimates of power switching devices, and switching stress can be calculated first. Then, these quantities are substituted into the corresponding mode calculation expressions to obtain the mode values ​​for continuous conduction mode, critical conduction mode, intermittent conduction mode, and valley turn-on mode. For example, under a certain operating state, the mode values ​​for continuous conduction mode, critical conduction mode, intermittent conduction mode, and valley turn-on mode can be obtained. All of these mode values ​​are calculated from the parameters in the same set of performance evaluation quantities through their respective mode calculation expressions.

[0097] The control mode with the smallest value among the mode values ​​is determined as the target control mode. Alternatively, mode values ​​can be filtered based on preset judgment conditions before selection. For example, under a light load condition, if the calculation results show that the intermittent conduction mode's mode value better meets the preset judgment conditions than other modes, the intermittent conduction mode can be selected as the target control mode. Under another condition, if the valley opening mode's mode value meets the preset priority condition, the valley opening mode can be selected as the target control mode. This allows for quantitative comparison of each control mode based on the same performance evaluation quantity within each control cycle, thereby selecting the target control mode suitable for the current operating state from multiple preset control modes.

[0098] S5. Drive signal generation: Generate drive signals for the power switching devices according to the target control mode, and control the power switching devices of the rectifier power supply based on the drive signals.

[0099] Specifically, once the target control mode is determined, a drive signal for the power switching device can be generated based on the switching control parameters corresponding to the target control mode. The switching control parameters may include the turn-on and turn-off times of the power switching device in the current control cycle. Based on the turn-on sequence and turn-on time required by the target control mode, a corresponding drive signal is generated and applied to the power switching device in the rectifier power supply so that the power switching device turns on or off according to the target control mode.

[0100] For example, when the target control mode is continuous conduction mode, a periodic drive signal can be generated according to the conduction interval of the corresponding mode, so that the power switching device receives the drive signal according to the set conduction time during the entire control cycle, and remains off at other times, thereby enabling the rectifier power supply to complete the corresponding switching action according to the target control mode.

[0101] S6. Comprehensive quantity update: Input the operating data of the rectifier power supply under the target control mode into the construction process of the comprehensive performance evaluation quantity, and update the comprehensive performance evaluation quantity based on the obtained data.

[0102] The overall update includes:

[0103] The parameters in the performance evaluation are updated based on the operating data of the rectified power supply under the target control mode.

[0104] The updated parameter values ​​are input into the next performance evaluation value construction process to generate new performance evaluation values, and the comprehensive value update process is repeated during the continuous operation of the rectifier power supply.

[0105] Specifically, the operating data generated by the rectifier power supply under the target control mode can include real-time operating parameters on the input and output sides. These operating parameters can be input into the construction process of the performance evaluation quantity to update the parameters in the performance evaluation quantity, so that the performance evaluation quantity can reflect the operating status of the rectifier power supply under the current control mode.

[0106] Furthermore, based on the above operating data, the parameters in the performance evaluation are updated so that each parameter is adjusted according to the operating changes of the rectifier power supply under different operating conditions. The updated parameters can be used in the next performance evaluation process so that the performance evaluation calculated in the next control cycle matches the operating state of the rectifier power supply under the current operating conditions.

[0107] Example 2, please refer to the appendix. Figure 2 A rectified power supply, comprising:

[0108] The data acquisition module is run to collect the input voltage, input current, output voltage, and output current of the rectifier power supply, and generate real-time operating parameters for control.

[0109] The performance evaluation construction module constructs performance evaluation quantities based on real-time operating parameters to characterize the operating status of the rectifier power supply. These performance evaluation quantities characterize the operating characteristics of the input side, the power conversion process, and the output side.

[0110] The parameter identification and update module performs online parameter identification on the operating model of the rectifier power supply, and updates the control parameters and performance evaluation parameters of the rectifier power supply based on the identification results.

[0111] The control mode determination module determines the target control mode from multiple preset control modes based on performance evaluation parameters.

[0112] The drive signal generation module generates drive signals for the power switching devices according to the target control mode;

[0113] The performance evaluation update module updates the parameters in the performance evaluation quantities based on the operating data of the rectifier power supply under the target control mode, and inputs the updated parameters into the next performance evaluation quantity construction process.

[0114] Specifically, the operation data acquisition module converts the voltage and current signals at the input and output terminals into operation data that can be used for calculation. The performance evaluation construction module can use the above operation data to generate evaluation information describing the current operating state of the rectifier power supply and use the evaluation information for subsequent control processes. The parameter identification and update module adjusts the parameters of the operation model online according to the changes in the operation of the rectifier power supply under different operating conditions, so that the parameters used for control calculation can be consistent with the real-time operating state. On this basis, the control mode determination module selects a control mode that matches the actual operating conditions of the rectifier power supply according to the current evaluation information, so that the rectifier power supply can perform rectification operation in a suitable manner under different operating conditions. The drive signal generation module generates switching signals for the power switching devices according to the selected control mode, so that the power switching devices are turned on and off according to the corresponding steps. The operation data of the rectifier power supply after execution of control is used by the performance evaluation update module to adjust the parameters in the evaluation information and continue to be used in the performance evaluation construction process in the next operating cycle, so that the rectifier power supply can continuously update the operation state description and complete the control mode switching according to the real-time operating conditions during continuous operation.

[0115] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method of controlling a rectifier power supply, characterized by, The method comprises the following steps: S1, collecting operation data to obtain real-time operation parameters for control, including input voltage, input current, output voltage and output current of the rectifier power supply; S2, constructing a comprehensive quantity based on the real-time operation parameters, the comprehensive quantity being used to represent the performance evaluation quantity of the rectifier power supply, and the performance evaluation quantity being used to represent the operation characteristics of the input side, the power conversion process and the output side; The comprehensive quantity construction comprises: calculating electrical characteristic quantities based on the real-time operation parameters, the electrical characteristic quantities including output voltage deviation, fundamental component of input current and harmonic component of input current; calculating loss estimation quantities of power switching devices through the real-time operation parameters; calculating voltage change rate and current change rate generated in the switching process based on the real-time operation parameters, and constructing the performance evaluation quantity according to the electrical characteristic quantities, the loss estimation quantities and the voltage change rate and current change rate; The comprehensive quantity construction further comprises: setting corresponding parameter quantities for the electrical characteristic quantities, the loss estimation quantities and the voltage change rate and current change rate respectively; performing combination operation on the electrical characteristic quantities, the loss estimation quantities and the voltage change rate and current change rate based on the parameter quantities to form the performance evaluation quantity; setting the parameter quantities as updateable parameter quantities, which are used to update the performance evaluation quantity based on the operation data of the rectifier power supply in subsequent steps; S3, parameter identification and update, performing online parameter identification on the operation model of the rectifier power supply, and updating the control parameters of the rectifier power supply and the related parameter quantities in the performance evaluation quantity based on the identification result; S4, control mode determination, determining the control mode of the rectifier power supply according to the performance evaluation quantity, and determining the target control mode from a plurality of preset control modes; The control mode determination comprises: establishing corresponding mode calculation expressions for a plurality of preset control modes, the mode calculation expressions being used to receive the parameter quantities in the performance evaluation quantity; calculating mode values for each preset control mode based on the mode calculation expressions, the mode values being used to represent the applicability of the preset control mode under the current operation state; determining the target control mode according to the comparison result of the mode values; The plurality of preset control modes include continuous conduction mode, critical conduction mode, discontinuous conduction mode and valley bottom on mode; S5, drive signal generation, generating the drive signal of the power switching device according to the target control mode, and controlling the power switching device of the rectifier power supply based on the drive signal; S6, comprehensive quantity update, inputting the operation data of the rectifier power supply under the target control mode into the construction process of the performance evaluation quantity, and updating the performance evaluation quantity according to the obtained data.

2. The rectifier power supply control method according to claim 1, wherein The operation data collection comprises: performing analog sampling on the input voltage and input current through the voltage sampling circuit and current sampling circuit connected to the input side of the rectifier power supply to obtain input side sampling signals; performing analog sampling on the output voltage and output current through the voltage sampling circuit and current sampling circuit connected to the output side of the rectifier power supply to obtain output side sampling signals; The input side sampling signal and the output side sampling signal are input to an analog-digital conversion circuit to obtain corresponding digital quantity operation parameters, and the digital quantity operation parameters are calibrated based on a preset calibration coefficient to output operation parameters.

3. The rectifier power supply control method of claim 1, wherein The parameter identification and updating includes: a model for describing operation characteristics of the rectifier power supply is established based on the real-time operation parameters; operation model parameters of the rectifier power supply are identified online based on the model to obtain identified parameter quantities; the control parameters of the rectifier power supply and the parameter quantities in the performance evaluation quantities are updated according to the identified parameter quantities.

4. The rectifier power supply control method according to claim 3, wherein The identified parameter quantities include parameter quantities for describing input side characteristics of the rectifier power supply, parameter quantities in an electric energy conversion process, and parameter quantities for describing output side characteristics.

5. The rectifier power supply control method of claim 1, wherein The comprehensive quantity updating includes: the parameter quantities in the performance evaluation quantities are updated based on operation data of the rectifier power supply in the target control mode; the updated parameter quantities are input to a construction process of a next performance evaluation quantity to generate a new performance evaluation quantity, and the comprehensive quantity updating process is repeatedly executed during continuous operation of the rectifier power supply.

6. A rectifier power supply characterized by comprising: A rectifier power supply control method according to any one of claims 1-5, the power supply includes: an operation data acquisition module that acquires input voltage, input current, output voltage, and output current of the rectifier power supply and generates real-time operation parameters for control; a performance evaluation construction module that constructs performance evaluation quantities for characterizing operation states of the rectifier power supply based on the real-time operation parameters, the performance evaluation quantities being used to characterize operation characteristics of an input side, an electric energy conversion process, and an output side; a parameter identification and updating module that performs online parameter identification of an operation model of the rectifier power supply and updates control parameters of the rectifier power supply and parameter quantities in the performance evaluation quantities based on an identification result; a control mode determination module that determines a target control mode from a plurality of preset control modes according to the performance evaluation quantities; a drive signal generation module that generates drive signals of power switching devices according to the target control mode; a performance evaluation updating module that updates the parameter quantities in the performance evaluation quantities based on operation data of the rectifier power supply in the target control mode and inputs the updated parameter quantities to a construction process of a next performance evaluation quantity.

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