Input-series output-parallel ISOP converter system operation control method, device and equipment, readable storage medium and program product

Abstract

The invention relates to an input-series output-parallel ISOP converter system operation control method, device and equipment, a readable storage medium and a program product. The method comprises the following steps: acquiring an input voltage, an output voltage, an output current, an input voltage reference value and an output voltage reference value of the ISOP converter system; inputting the output voltage and the output voltage reference value into a voltage loop to obtain a new output voltage; inputting the new output voltage into a virtual direct current motor to obtain an armature current; inputting the input voltage and the input voltage reference value into a grading ring to obtain an inductive current; inputting the armature current, the inductive current and the output current into a current loop to obtain a duty ratio; and controlling the ISOP converter system by controlling the duty ratio. The method can ensure that the voltage of the device does not drop greatly, and improves the stability of the system.

Description

Technical Field

[0001] The present application relates to the field of automatic control technology, and in particular to an operation control method, device, equipment, readable storage medium and program product of an input series output parallel converter system. Background Art

[0002] With the booming development of electricity, icing accidents on power transmission lines occur frequently in icy and snowy weather, and the safety of power transmission lines is difficult to guarantee. The DC ice melting device is a device used to protect the safety of power transmission lines in icy and snowy weather. The main function of the DC ice melting device is to apply DC voltage and short-circuit at the end of the transmission line to heat the conductor, thereby melting the ice on the transmission line and preventing the line from collapsing due to ice.

[0003] The input-series output-parallel (ISOP) converter system is used to adjust the capacity in the DC ice-melting device. When the DC ice-melting capacity needs to be adjusted, the load power usually changes greatly. Although the output parallel system can reduce the power of each module, the sudden load change will still cause the system output voltage to drop and even affect the working condition of the DC load. Summary of the invention

[0004] Based on this, it is necessary to provide an input series output parallel ISOP converter system operation control method, device, equipment, readable storage medium and program product that can enable the ISOP system to operate smoothly in response to the above technical problems.

[0005] In a first aspect, the present application provides an operation control method of an input series output parallel ISOP converter system, comprising:

[0006] Obtaining input voltage, output voltage, output current, input voltage reference value and output voltage reference value of the ISOP converter system;

[0007] Inputting the output voltage and the output voltage reference value into the voltage loop in the ISOP converter system to obtain a new output voltage; inputting the new output voltage into the virtual DC motor in the ISOP converter system to obtain an armature current; inputting the input voltage and the input voltage reference value into the voltage equalizing loop in the ISOP converter system to obtain an inductor current;

[0008] The armature current, the inductor current and the output current are input into the current loop of the ISOP converter system to obtain the duty cycle; and the operation of the ISOP converter system is controlled by controlling the duty cycle.

[0009] In one embodiment, the step of inputting the output voltage and the output voltage reference value into the voltage loop of the ISOP converter system to obtain a new output voltage includes:

[0010] The output voltage and the output voltage reference value are operated, and the operation result is passed through a first proportional-integral controller to obtain an output current reference value; a new output voltage is determined according to the output current reference value, a closed-loop transfer function of the current inner loop, and a load impedance.

[0011] In one embodiment, the step of inputting the new output voltage into the virtual DC motor of the ISOP converter system to obtain the armature current comprises:

[0012] The new output voltage and the output voltage reference value are input into the voltage controller, and the mechanical power is obtained through the first proportional integral controller; the mechanical power is input into the virtual DC motor to obtain the armature current.

[0013] In one embodiment, the step of inputting the mechanical power into a virtual DC motor to obtain an armature current comprises:

[0014] The mechanical torque is determined according to the mechanical power and the reference angular velocity; the actual angular velocity is determined according to the mechanical torque, the electromagnetic torque, the change in the reference angular velocity and the damping coefficient; the armature potential is determined according to the actual angular velocity; and the armature current is determined according to the armature potential.

[0015] In one embodiment, inputting the input voltage and the input voltage reference value into the voltage grading loop of the ISOP converter system to obtain the inductor current includes:

[0016] The voltage error is determined according to the input voltage and the input voltage reference value; the voltage error is passed through a voltage equalizing controller to obtain a current reference value of the voltage equalizing loop; and the inductor current is determined according to the current reference value and the closed-loop transfer function of the current inner loop.

[0017] In one embodiment, inputting the armature current, the inductor current and the output current into the current loop of the ISOP converter system to obtain a duty cycle comprises:

[0018] A current reference value of a current loop is determined according to the armature current and the inductor current; a current error is determined according to the current reference value and the output current; and a duty cycle is determined according to the current error and a second proportional-integral controller.

[0019] In a second aspect, the present application also provides an input series output parallel ISOP converter system operation control device, comprising:

[0020] An acquisition module, used for acquiring an input voltage, an output voltage, an output current, an input voltage reference value and an output voltage reference value of the ISOP converter system;

[0021] The first control module is used to input the output voltage and the output voltage reference value into the voltage loop in the ISOP converter system to obtain a new output voltage; input the new output voltage into the virtual DC motor in the ISOP converter system to obtain an armature current; input the input voltage and the input voltage reference value into the voltage equalizing loop in the ISOP converter system to obtain an inductor current;

[0022] The second control module is used to input the armature current, the inductor current and the output current into the current loop in the ISOP converter system to obtain a duty cycle; and control the operation of the ISOP converter system by controlling the duty cycle.

[0023] In a third aspect, the present application further provides a device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0024] Obtaining an input voltage, an output voltage, an output current, an input voltage reference value, and an output voltage reference value of the ISOP converter system;

[0025] Inputting the output voltage and the output voltage reference value into the voltage loop in the ISOP converter system to obtain a new output voltage; inputting the new output voltage into the virtual DC motor in the ISOP converter system to obtain an armature current; inputting the input voltage and the input voltage reference value into the voltage equalizing loop in the ISOP converter system to obtain an inductor current;

[0026] The armature current, the inductor current and the output current are input into the current loop of the ISOP converter system to obtain the duty cycle; and the operation of the ISOP converter system is controlled by controlling the duty cycle.

[0027] In a fourth aspect, the present application further provides a readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the following steps are implemented:

[0028] Obtaining an input voltage, an output voltage, an output current, an input voltage reference value, and an output voltage reference value of the ISOP converter system;

[0029] Inputting the output voltage and the output voltage reference value into the voltage loop in the ISOP converter system to obtain a new output voltage; inputting the new output voltage into the virtual DC motor in the ISOP converter system to obtain an armature current; inputting the input voltage and the input voltage reference value into the voltage equalizing loop in the ISOP converter system to obtain an inductor current;

[0030] The armature current, the inductor current and the output current are input into the current loop of the ISOP converter system to obtain the duty cycle; and the operation of the ISOP converter system is controlled by controlling the duty cycle.

[0031] In a fifth aspect, the present application further provides a program product, including a computer program, which implements the following steps when executed by a processor:

[0032] Obtaining an input voltage, an output voltage, an output current, an input voltage reference value, and an output voltage reference value of the ISOP converter system;

[0033] Inputting the output voltage and the output voltage reference value into the voltage loop in the ISOP converter system to obtain a new output voltage; inputting the new output voltage into the virtual DC motor in the ISOP converter system to obtain an armature current; inputting the input voltage and the input voltage reference value into the voltage equalizing loop in the ISOP converter system to obtain an inductor current;

[0034] The armature current, the inductor current and the output current are input into the current loop of the ISOP converter system to obtain the duty cycle; and the operation of the ISOP converter system is controlled by controlling the duty cycle.

[0035] The above-mentioned input series output parallel ISOP converter system operation control method, device, equipment, readable storage medium and program product obtain the input voltage, output voltage, output current, input voltage reference value and output voltage reference value of the ISOP converter system; input the output voltage and the output voltage reference value into the voltage loop in the ISOP converter system to obtain a new output voltage; input the new output voltage into the virtual DC motor in the ISOP converter system to obtain the armature current; input the input voltage and the input voltage reference value into the voltage equalizing loop in the ISOP converter system to obtain the inductor current; input the armature current, the inductor current and the output current into the current loop in the ISOP converter system to obtain the duty cycle; and control the operation of the ISOP converter system by controlling the duty cycle. When the current output capacity of the DC ice melting changes, by introducing the virtual DC motor control, it is ensured that the output voltage of the device will not drop significantly, thereby improving the stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic flow chart of an operation control method of a series-input and parallel-output ISOP converter system in one embodiment;

[0038] Figure 2 is a schematic diagram of a voltage loop in one embodiment;

[0039] Figure 3 is a schematic diagram of a voltage controller in one embodiment;

[0040] Figure 4 is a schematic diagram of a pressure equalizing ring in another embodiment;

[0041] Figure 5 is a schematic diagram of a current loop in one embodiment;

[0042] Figure 6 A schematic diagram of an operation control method of a series-input and parallel-output ISOP converter system in one embodiment;

[0043] Figure 7 A diagram of an operation control device for an ISOP converter system with series input and parallel output in one embodiment;

[0044] FIG. 8 is a diagram showing the internal structure of a device in one embodiment. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0046] In one embodiment, Figure 1 As shown, a method for controlling the operation of an ISOP converter system with series input and parallel output is provided. In this embodiment, the method includes the following steps:

[0047] Step 102: Obtain an input voltage, an output voltage, an output current, an input voltage reference value, and an output voltage reference value of the ISOP converter system.

[0048] Among them, the ISOP converter system is a power electronic system integration technology in which multiple converter modules are connected in series at the input and in parallel at the output. This system configuration is particularly suitable for high voltage or high current application scenarios and can solve the design problems caused by high voltage or high current.

[0049] Exemplarily, the input voltage, output voltage, and output current of the ISOP converter system are measured to obtain an input voltage reference value and an output voltage reference value.

[0050] Step 104, inputting the output voltage and the output voltage reference value into the voltage loop in the ISOP converter system to obtain a new output voltage; inputting the new output voltage into the virtual DC motor in the ISOP converter system to obtain an armature current; inputting the input voltage and the input voltage reference value into the voltage equalizing loop in the ISOP converter system to obtain an inductor current.

[0051] Exemplarily, the output voltage and the output voltage reference value are input into the voltage loop in the ISOP converter system to obtain a new output voltage; the new output voltage is input into the virtual DC motor in the ISOP converter system to obtain the armature current; the input voltage and the input voltage reference value are input into the voltage equalizing loop in the ISOP converter system to obtain the inductor current.

[0052] Step 106: input the armature current, the inductor current and the output current into a current loop in the ISOP converter system to obtain a duty cycle; and control the operation of the ISOP converter system by controlling the duty cycle.

[0053] Among them, the duty cycle is controlled by the electronic control unit to modulate the pulse width of a voltage signal of a certain frequency applied to the working execution element to achieve accurate and continuous control of the working condition of the element.

[0054] Exemplarily, the armature current, the inductor current and the output current are input into the current loop of the ISOP converter system to obtain the duty cycle; and the operation of the ISOP converter system is controlled by controlling the duty cycle.

[0055] The above-mentioned input series output parallel ISOP converter system operation control method, device, equipment, readable storage medium and program product obtain the input voltage, output voltage, output current, input voltage reference value and output voltage reference value of the ISOP converter system; input the output voltage and the output voltage reference value into the voltage loop in the ISOP converter system to obtain a new output voltage; input the new output voltage into the virtual DC motor in the ISOP converter system to obtain the armature current; input the input voltage and the input voltage reference value into the voltage equalizing loop in the ISOP converter system to obtain the inductor current; input the armature current, the inductor current and the output current into the current loop in the ISOP converter system to obtain the duty cycle; and control the operation of the ISOP converter system by controlling the duty cycle. When the current output capacity of the DC ice melting changes, by introducing the virtual DC motor control, it is ensured that the output voltage of the device will not drop significantly, thereby improving the stability of the system.

[0056] In an exemplary embodiment, Figure 3 As shown, the output voltage and the output voltage reference value are input into the voltage loop of the ISOP converter system to obtain a new output voltage, including:

[0057] The output voltage and the output voltage reference value are operated, and the operation result is passed through a first proportional-integral controller to obtain an output current reference value; a new output voltage is determined according to the output current reference value, a closed-loop transfer function of the current inner loop, and a load impedance.

[0058] Among them, the first proportional integral controller is ,in is the proportionality coefficient, is the integration coefficient and s is the integral.

[0059] Among them, the closed-loop transfer function of the current inner loop is: ; is the open-loop transfer function of the inner current loop, expressed as ; is the transfer function from duty cycle to output inductor current of the phase-shifted full-bridge converter, It is the second proportional-integral controller.

[0060] For example, the output voltage reference value Subtract the output voltage , the result is passed through the first proportional integral controller , get the output current reference value , the voltage loop current reference value passes through the closed loop transfer function of the two current inner loops respectively Get two voltage loop currents and , add the two voltage loop currents and get a new output voltage through the load impedance , as the input voltage of the virtual DC motor and the output voltage of the next control.

[0061] In this embodiment, a new output voltage is determined according to the output voltage reference value and the output voltage, and the power of the virtual DC motor can be controlled by controlling the new output voltage.

[0062] In an exemplary embodiment, Figure 4 As shown, the new output voltage is input into the virtual DC motor of the ISOP converter system to obtain the armature current, including:

[0063] The new output voltage and the output voltage reference value are input into the voltage controller, and the mechanical power is obtained through the first proportional integral controller; the mechanical power is input into the virtual DC motor to obtain the armature current.

[0064] For example, the output voltage reference value Subtract the new output voltage , the result is passed through the first proportional integral controller , get the mechanical power of the virtual DC motor , the output mechanical power of the output voltage regulator The actual angular velocity of the DC motor is obtained through the rotor motion equation , thereby controlling the armature potential of the DC motor, and finally the armature current Calculated from the armature circuit equation.

[0065] Among them, the armature circuit equation is: , is the torque coefficient of the virtual DC motor; is the magnetic flux of the virtual DC motor; E is the armature potential of the virtual DC motor; is the new output voltage; is the virtual resistance of the virtual DC motor.

[0066] In this embodiment, the system can be accurately controlled by controlling the mechanical power of the virtual DC motor through the output voltage controller.

[0067] In an exemplary embodiment, inputting the mechanical power into the virtual DC motor to obtain the armature current includes:

[0068] The mechanical torque is determined according to the mechanical power and the reference angular velocity; the actual angular velocity is determined according to the mechanical torque, the electromagnetic torque, the change in the reference angular velocity and the damping coefficient; the armature potential is determined according to the actual angular velocity; and the armature current is determined according to the armature potential.

[0069] For example, mechanical power Divide by the base angular velocity Then the mechanical torque is obtained ,at this time Subtract electromagnetic torque and the angular velocity change The product of the damping coefficient D is integrated to obtain the actual angular velocity , thus the mathematical model of the DC motor is converted into a control model control diagram. The magnitude of the armature potential E depends on the actual angular velocity of the rotor , by controlling the actual angular velocity of the DC motor The output voltage can be controlled constantly. Output mechanical power of the output voltage regulator The actual angular velocity of the DC motor is obtained through the rotor motion equation , thereby controlling the armature potential E of the DC motor, and finally the armature current Calculated from the armature circuit equation.

[0070] In this embodiment, the armature current is controlled by a virtual DC motor, so that the stability of the system can be improved.

[0071] In an exemplary embodiment, inputting the input voltage and the input voltage reference value into the voltage sharing loop of the ISOP converter system to obtain the inductor current includes:

[0072] The voltage error is determined according to the input voltage and the input voltage reference value; the voltage error is passed through a voltage equalizing controller to obtain a current reference value of the voltage equalizing loop; and the inductor current is determined according to the current reference value and the closed-loop transfer function of the current inner loop.

[0073] For example, the input voltage and input voltage reference Make a difference, take the result as the error, and pass the error through the voltage equalization controller , get the reference value of the voltage grading ring current , and then through the closed-loop transfer function of the current inner loop , and the inductor current is obtained , In addition, the inductor current The transfer function from the inductor current to the input voltage of the phase-shifted full-bridge converter is , and get the new input voltage As the input voltage for the next control.

[0074] In this embodiment, a voltage grading ring is used to evenly distribute the voltage of each module to prevent a large voltage drop.

[0075] In an exemplary embodiment, inputting the armature current, the inductor current and the output current into the current loop of the ISOP converter system to obtain a duty cycle includes:

[0076] A current reference value of a current loop is determined according to the armature current and the inductor current; a current error is determined according to the current reference value and the output current; and a duty cycle is determined according to the current error and a second proportional-integral controller.

[0077] Exemplarily, the armature current and the inductor current are added to obtain the current reference value of the current loop ,Will Subtract the output current of the current loop , get the current error, and pass the current error through the second proportional integral controller , the duty cycle can be controlled , voltage and current equalization are achieved through duty cycle.

[0078] In this embodiment, voltage and current equalization is achieved by controlling the duty cycle, thereby protecting the system voltage from a large drop and ensuring the safety of the system.

[0079] In an exemplary embodiment, as shown in the figure, the input voltage, output voltage, and output current of the ISOP converter system are measured to obtain an input voltage reference value and an output voltage reference value. Subtract the output voltage , the result is passed through the first proportional integral controller , get the output current reference value , the voltage loop current reference value passes through the closed loop transfer function of the two current inner loops respectively Get two voltage loop currents and , add the two voltage loop currents and get a new output voltage through the load impedance , as the input voltage of the virtual DC motor and the output voltage of the next control. Subtract the new output voltage , the result is passed through the first proportional integral controller , get the mechanical power of the virtual DC motor , mechanical power Divide by the base angular velocity Then the mechanical torque is obtained ,at this time Subtract electromagnetic torque and the angular velocity change The product of the damping coefficient D is integrated to obtain the actual angular velocity , thus the mathematical model of the DC motor is converted into a control model control diagram. The magnitude of the armature potential E depends on the actual angular velocity of the rotor , by controlling the actual angular velocity of the DC motor The output voltage can be controlled constantly. Output mechanical power of the output voltage regulator The actual angular velocity of the DC motor is obtained through the rotor motion equation , thereby controlling the armature potential E of the DC motor, and finally the armature current Calculated from the armature circuit equation. and input voltage reference Make a difference, take the result as the error, and pass the error through the voltage equalization controller , get the reference value of the voltage grading ring current , and then through the closed-loop transfer function of the current inner loop , and the inductor current is obtained , In addition, the inductor current The transfer function from the inductor current to the input voltage of the phase-shifted full-bridge converter is , and get the new input voltage As the input voltage for the next control. Add the armature current and the inductor current to get the current reference value of the current loop ,Will Subtract the output current of the current loop , get the current error, and pass the current error through the second proportional integral controller , the duty cycle can be controlled , voltage and current equalization are achieved through duty cycle.

[0080] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0081] In an exemplary embodiment, Figure 7 As shown, an input series output parallel ISOP converter system operation control device is provided, comprising: an acquisition module, a first control module and a second control module, wherein:

[0082] An acquisition module, used for acquiring an input voltage, an output voltage, an output current, an input voltage reference value and an output voltage reference value of the ISOP converter system;

[0083] The first control module is used to input the output voltage and the output voltage reference value into the voltage loop in the ISOP converter system to obtain a new output voltage; input the new output voltage into the virtual DC motor in the ISOP converter system to obtain an armature current; input the input voltage and the input voltage reference value into the voltage equalizing loop in the ISOP converter system to obtain an inductor current;

[0084] The second control module is used to input the armature current, the inductor current and the output current into the current loop in the ISOP converter system to obtain a duty cycle; and control the operation of the ISOP converter system by controlling the duty cycle.

[0085] In one embodiment, the first control module is further configured to:

[0086] The output voltage and the output voltage reference value are operated, and the operation result is passed through a first proportional-integral controller to obtain an output current reference value; a new output voltage is determined according to the output current reference value, a closed-loop transfer function of the current inner loop, and a load impedance.

[0087] In one embodiment, the first control module is further configured to:

[0088] The new output voltage and the output voltage reference value are input into the voltage controller, and the mechanical power is obtained through the first proportional integral controller; the mechanical power is input into the virtual DC motor to obtain the armature current.

[0089] In one embodiment, the first control module is further configured to:

[0090] The mechanical torque is determined according to the mechanical power and the reference angular velocity; the actual angular velocity is determined according to the mechanical torque, the electromagnetic torque, the change in the reference angular velocity and the damping coefficient; the armature potential is determined according to the actual angular velocity; and the armature current is determined according to the armature potential.

[0091] In one embodiment, the first control module is further configured to:

[0092] The voltage error is determined according to the input voltage and the input voltage reference value; the voltage error is passed through a voltage equalizing controller to obtain a current reference value of the voltage equalizing loop; and the inductor current is determined according to the current reference value and the closed-loop transfer function of the current inner loop.

[0093] In one embodiment, the second control module is further configured to:

[0094] A current reference value of a current loop is determined according to the armature current and the inductor current; a current error is determined according to the current reference value and the output current; and a duty cycle is determined according to the current error and a second proportional-integral controller.

[0095] Each module in the above-mentioned input series output parallel ISOP converter system operation control device can be fully or partially implemented by software, hardware and their combination. The above-mentioned modules can be embedded in or independent of the processor in the device in the form of hardware, or can be stored in the memory in the device in the form of software, so that the processor can call and execute the corresponding operations of the above modules.

[0096] In an exemplary embodiment, a device is provided, which may be a server, and its internal structure diagram may be shown in FIG8. The device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the device is used to provide computing and control capabilities. The memory of the device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the device is used to store output voltage data. The input / output interface of the device is used to exchange information between the processor and an external device. The communication interface of the device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for controlling the operation of an input series output parallel ISOP converter system is implemented.

[0097] Those skilled in the art will understand that the structure shown in FIG. 8 is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the device to which the scheme of the present application is applied. The specific device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0098] In an exemplary embodiment, a device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0099] Obtaining an input voltage, an output voltage, an output current, an input voltage reference value, and an output voltage reference value of the ISOP converter system;

[0100] Inputting the output voltage and the output voltage reference value into the voltage loop in the ISOP converter system to obtain a new output voltage; inputting the new output voltage into the virtual DC motor in the ISOP converter system to obtain an armature current; inputting the input voltage and the input voltage reference value into the voltage equalizing loop in the ISOP converter system to obtain an inductor current;

[0101] The armature current, the inductor current and the output current are input into the current loop of the ISOP converter system to obtain the duty cycle; and the operation of the ISOP converter system is controlled by controlling the duty cycle.

[0102] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0103] The output voltage and the output voltage reference value are operated, and the operation result is passed through a first proportional-integral controller to obtain an output current reference value; a new output voltage is determined according to the output current reference value, a closed-loop transfer function of the current inner loop, and a load impedance.

[0104] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0105] The new output voltage and the output voltage reference value are input into the voltage controller, and the mechanical power is obtained through the first proportional integral controller; the mechanical power is input into the virtual DC motor to obtain the armature current.

[0106] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0107] The mechanical torque is determined according to the mechanical power and the reference angular velocity; the actual angular velocity is determined according to the mechanical torque, the electromagnetic torque, the change in the reference angular velocity and the damping coefficient; the armature potential is determined according to the actual angular velocity; and the armature current is determined according to the armature potential.

[0108] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0109] The voltage error is determined according to the input voltage and the input voltage reference value; the voltage error is passed through a voltage equalizing controller to obtain a current reference value of the voltage equalizing loop; and the inductor current is determined according to the current reference value and the closed-loop transfer function of the current inner loop.

[0110] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0111] A current reference value of a current loop is determined according to the armature current and the inductor current; a current error is determined according to the current reference value and the output current; and a duty cycle is determined according to the current error and a second proportional-integral controller.

[0112] In one embodiment, a readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0113] Obtaining an input voltage, an output voltage, an output current, an input voltage reference value, and an output voltage reference value of the ISOP converter system;

[0114] Inputting the output voltage and the output voltage reference value into the voltage loop in the ISOP converter system to obtain a new output voltage; inputting the new output voltage into the virtual DC motor in the ISOP converter system to obtain an armature current; inputting the input voltage and the input voltage reference value into the voltage equalizing loop in the ISOP converter system to obtain an inductor current;

[0115] The armature current, the inductor current and the output current are input into the current loop of the ISOP converter system to obtain the duty cycle; and the operation of the ISOP converter system is controlled by controlling the duty cycle.

[0116] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0117] The output voltage and the output voltage reference value are operated, and the operation result is passed through a first proportional-integral controller to obtain an output current reference value; a new output voltage is determined according to the output current reference value, a closed-loop transfer function of the current inner loop, and a load impedance.

[0118] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0119] The new output voltage and the output voltage reference value are input into the voltage controller, and the mechanical power is obtained through the first proportional integral controller; the mechanical power is input into the virtual DC motor to obtain the armature current.

[0120] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0121] The mechanical torque is determined according to the mechanical power and the reference angular velocity; the actual angular velocity is determined according to the mechanical torque, the electromagnetic torque, the change in the reference angular velocity and the damping coefficient; the armature potential is determined according to the actual angular velocity; and the armature current is determined according to the armature potential.

[0122] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0123] The voltage error is determined according to the input voltage and the input voltage reference value; the voltage error is passed through a voltage equalizing controller to obtain a current reference value of the voltage equalizing loop; and the inductor current is determined according to the current reference value and the closed-loop transfer function of the current inner loop.

[0124] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0125] A current reference value of a current loop is determined according to the armature current and the inductor current; a current error is determined according to the current reference value and the output current; and a duty cycle is determined according to the current error and a second proportional-integral controller.

[0126] In one embodiment, a program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0127] Obtaining an input voltage, an output voltage, an output current, an input voltage reference value, and an output voltage reference value of the ISOP converter system;

[0128] Inputting the output voltage and the output voltage reference value into the voltage loop in the ISOP converter system to obtain a new output voltage; inputting the new output voltage into the virtual DC motor in the ISOP converter system to obtain an armature current; inputting the input voltage and the input voltage reference value into the voltage equalizing loop in the ISOP converter system to obtain an inductor current;

[0129] The armature current, the inductor current and the output current are input into the current loop of the ISOP converter system to obtain the duty cycle; and the operation of the ISOP converter system is controlled by controlling the duty cycle.

[0130] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0131] The output voltage and the output voltage reference value are operated, and the operation result is passed through a first proportional-integral controller to obtain an output current reference value; a new output voltage is determined according to the output current reference value, a closed-loop transfer function of the current inner loop, and a load impedance.

[0132] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0133] The new output voltage and the output voltage reference value are input into the voltage controller, and the mechanical power is obtained through the first proportional integral controller; the mechanical power is input into the virtual DC motor to obtain the armature current.

[0134] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0135] The mechanical torque is determined according to the mechanical power and the reference angular velocity; the actual angular velocity is determined according to the mechanical torque, the electromagnetic torque, the change in the reference angular velocity and the damping coefficient; the armature potential is determined according to the actual angular velocity; and the armature current is determined according to the armature potential.

[0136] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0137] The voltage error is determined according to the input voltage and the input voltage reference value; the voltage error is passed through a voltage equalizing controller to obtain a current reference value of the voltage equalizing loop; and the inductor current is determined according to the current reference value and the closed-loop transfer function of the current inner loop.

[0138] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0139] A current reference value of a current loop is determined according to the armature current and the inductor current; a current error is determined according to the current reference value and the output current; and a duty cycle is determined according to the current error and a second proportional-integral controller.

[0140] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0141] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0142] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for controlling the operation of an ISOP converter system with serial input and parallel output, characterized in that: The method comprises: Obtaining an input voltage, an output voltage, an output current, an input voltage reference value, and an output voltage reference value of the ISOP converter system; Inputting the output voltage and the output voltage reference value into the voltage loop in the ISOP converter system to obtain a new output voltage; inputting the new output voltage into the virtual DC motor in the ISOP converter system to obtain an armature current; inputting the input voltage and the input voltage reference value into the voltage equalizing loop in the ISOP converter system to obtain an inductor current; The armature current, the inductor current and the output current are input into the current loop of the ISOP converter system to obtain the duty cycle; and the operation of the ISOP converter system is controlled by controlling the duty cycle.

2. The method according to claim 1, characterized in that The step of inputting the output voltage and the output voltage reference value into the voltage loop of the ISOP converter system to obtain a new output voltage comprises: The output voltage and the output voltage reference value are operated, and the operation result is passed through a first proportional integral controller to obtain an output current reference value; A new output voltage is determined according to the output current reference value, the closed-loop transfer function of the current inner loop and the load impedance.

3. The method according to claim 1, characterized in that The step of inputting the new output voltage into the virtual DC motor of the ISOP converter system to obtain the armature current comprises: Inputting the new output voltage and the output voltage reference value into the voltage controller, and obtaining the mechanical power through the first proportional-integral controller; The mechanical power is input into the virtual DC motor to obtain the armature current.

4. The method according to claim 3, characterized in that: The step of inputting the mechanical power into the virtual DC motor to obtain the armature current comprises: determining a mechanical torque according to the mechanical power and a reference angular velocity; Determining the actual angular velocity according to the mechanical torque, the electromagnetic torque, the variation of the reference angular velocity and the damping coefficient; determining an armature potential according to the actual angular velocity; The armature current is determined based on the armature potential.

5. The method according to claim 1, characterized in that The step of inputting the input voltage and the input voltage reference value into the voltage grading loop of the ISOP converter system to obtain the inductor current comprises: determining a voltage error according to the input voltage and the input voltage reference value; The voltage error is passed through a voltage balancing controller to obtain a current reference value of the voltage balancing ring; The inductor current is determined based on the current reference value and the closed-loop transfer function of the current inner loop.

6. The method according to claim 1, characterized in that The step of inputting the armature current, the inductor current and the output current into the current loop of the ISOP converter system to obtain a duty cycle comprises: Determining a current reference value of a current loop according to the armature current and the inductor current; determining a current error according to the current reference value and the output current; A duty cycle is determined based on the current error and a second proportional-integral controller.

7. An operation control device for an ISOP converter system with serial input and parallel output, characterized in that: The device comprises: An acquisition module, used for acquiring an input voltage, an output voltage, an output current, an input voltage reference value and an output voltage reference value of the ISOP converter system; The first control module is used to input the output voltage and the output voltage reference value into the voltage loop in the ISOP converter system to obtain a new output voltage; input the new output voltage into the virtual DC motor in the ISOP converter system to obtain an armature current; input the input voltage and the input voltage reference value into the voltage equalizing loop in the ISOP converter system to obtain an inductor current; The second control module is used to input the armature current, the inductor current and the output current into the current loop in the ISOP converter system to obtain a duty cycle; and control the operation of the ISOP converter system by controlling the duty cycle.

8. A device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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