A multi-module output control method and system

Abstract

The embodiment of the application discloses a kind of multi-module output control method and system, this method is suitable for power module series system, power module series system includes N power module series, N is the integer greater than 1, this method includes: first power module obtains the total output voltage of power module series system, and the full load working time length corresponding to each power module in N power module;According to total output voltage, first average voltage is calculated to determine the voltage interval to which first average voltage belongs;According to the voltage interval to which first average voltage belongs, the distribution strategy of total output voltage is determined, total output voltage is distributed according to distribution strategy, and N voltage components are obtained;According to full load working time length, the voltage component corresponding to each power module is determined, and N voltage components and N power modules are one-to-one mapping relationship.Using the embodiment of the application, the failure-free running time of power module series system can be extended and the working efficiency can be improved.

Description

Technical Field

[0001] This invention relates to the field of electronic power technology, and in particular to a multi-module output control method and system. Background Technology

[0002] With the continuous advancement of electronic power technology and the sustained development of the energy industry, modular power supplies are widely used in various power fields. In a series power module system, since each power module outputs in series and has the same output current, controlling each power module to output the same voltage ensures that the output power of each power module in the system remains consistent, theoretically increasing the system's trouble-free operating time. Although traditional control methods balance the lifespan of each power module, in practical applications, due to factors such as repairs and replacements, the operating time of each power module is not entirely consistent. Therefore, directly equalizing the voltage cannot completely guarantee an extended trouble-free operating time. Furthermore, the output voltage and current of each power module depend entirely on the load demand, and it cannot be guaranteed that the power modules in the system operate at their optimal efficiency point, resulting in low overall system efficiency. Summary of the Invention

[0003] This application provides a multi-module output control method and system, which can extend the fault-free operation time of a power module series system and improve the system's working efficiency.

[0004] In a first aspect, embodiments of this application provide a multi-module output control method applicable to a power module series system, the power module series system comprising N power modules connected in series, each power module including a first power module and at least one second power module, where N is an integer greater than 1, the method comprising: the first power module acquiring the total output voltage of the power module series system and the full-load operating time corresponding to each of the N power modules; the first power module calculating a first average voltage based on the total output voltage and determining the voltage range to which the first average voltage belongs; the first power module determining a distribution strategy for the total output voltage based on the voltage range to which the first average voltage belongs, and distributing the total output voltage according to the distribution strategy to obtain N voltage components; the first power module determining the voltage component corresponding to each power module based on the full-load operating time, wherein the N voltage components are mapped one-to-one with the N power modules.

[0005] By using a master-slave power module control method in a series power module system, the first power module controls the working state of each power module through an efficiency optimization control algorithm and a lifespan balancing control method. This allows most of the power modules in the series system to operate at their highest efficiency point and dynamically balances the working lifespan of each power module in the system, thereby significantly extending the fault-free operation time, achieving efficient operation of the series system, and improving the robustness of the series system.

[0006] In one possible design, when the first average voltage falls within a first voltage range, the first peak efficiency operating voltage corresponding to the first voltage range is used as the voltage component of M power modules out of the N power modules, where M is an integer greater than or equal to 0 and less than or equal to N. Based on the voltage components of the M power modules and the total output voltage, the voltage components of the other power modules out of the N power modules are determined. When the first average voltage is within the first voltage range, based on the total output voltage and the first peak efficiency operating voltage corresponding to the first voltage range, the first power module uses an efficiency optimization control algorithm to ensure that most power modules operate at their highest efficiency operating point corresponding to the first voltage range. This guarantees both the total output voltage required by the series system and achieves the highest efficiency operation of the series system under this allocation strategy.

[0007] In another possible design, the voltage components of the N power modules other than the M power modules satisfy:

[0008]

[0009]

[0010] Wherein, the V set1 V represents the voltage component of the power modules other than the M power modules among the N power modules. total The total output voltage, V max1 This represents the first peak efficiency operating voltage corresponding to the first voltage range. This indicates rounding down to the nearest integer.

[0011] In another possible design, when the first average voltage falls within the second voltage range, the second peak efficiency operating voltage corresponding to the second voltage range is used as the voltage component of K power modules out of the N power modules, where K is an integer greater than or equal to 0 and less than or equal to N. Based on the voltage components of the K power modules and the total output voltage, the voltage components of the other power modules out of the N power modules are determined. When the first average voltage is in the second voltage range, based on the total output voltage and the second peak efficiency operating voltage corresponding to the second voltage range, the first power module uses an efficiency optimization control algorithm to operate at the highest efficiency operating point corresponding to the second voltage range as much as possible. This ensures both the total output voltage required by the series system and the highest efficiency operation of the series system under this allocation strategy.

[0012] In another possible design, when NK is greater than or equal to 2, the second average voltage of the other power modules (excluding the K power modules) among the N power modules is determined based on the voltage components of the K power modules and the total output voltage. When the second average voltage belongs to the first voltage range, the first peak efficiency operating voltage corresponding to the first voltage range is used as the voltage component of P power modules among the other power modules, where P is an integer greater than or equal to 0 and less than or equal to NK. Based on the voltage components of the K power modules, the voltage components of the P power modules, and the total output voltage, the voltage components of the remaining power modules (excluding the P power modules) are determined. When the second average voltage belongs to the first voltage range, the other power modules are made to operate at their highest efficiency operating points corresponding to the first voltage range as much as possible, ensuring that most of the power modules in the series system operate at their highest efficiency operating points. This guarantees the total output voltage required by the series system while achieving the highest efficiency operation of the series system under this allocation strategy.

[0013] In another possible design, the second average voltage satisfies:

[0014]

[0015]

[0016] The voltage components of the remaining power modules other than the P power modules satisfy the following:

[0017]

[0018]

[0019] Wherein, the V set2 This represents the second average voltage, Vtotal The total output voltage, V max2 V represents the second peak efficiency operating voltage corresponding to the second voltage range. set3 V represents the voltage components of the other power modules besides the P power modules. max1 This indicates the first peak efficiency operating voltage corresponding to the first voltage range.

[0020] In another possible design, when NK equals 1, the total output voltage is subtracted from the sum of the voltage components of the K power modules to obtain the remaining voltage. This remaining voltage is then used as the voltage component of the other power modules among the N power modules, excluding the K power modules. By treating the remaining voltage as the voltage component of a single power module, the required total output voltage for the series system is ensured, while also enabling the series system to operate at its highest efficiency under this allocation strategy.

[0021] In another possible design, the full-load operating time is mapped one-to-one with the N voltage components in descending order, according to an ascending order, to obtain the voltage component corresponding to each of the N power modules. The first power module controls the operating state of each power module through a lifespan balancing control method, which can achieve efficient operation of the series system and dynamically balance the operating lifespan of each power module in the system, thereby improving the robustness of the series system.

[0022] In another possible design, the first power module acquires the output current of the series power module system; based on the output current, it determines a first output limit current corresponding to the first power module and a second output limit current corresponding to the second power module. By determining the first and second output limit currents based on the output current of the series system and the power module's own output current limiting strategy, the first and second output limit currents are ensured to guarantee that the current output capability of the second power module is greater than the output current capability of the first power module, allowing each power module to operate in a constant voltage state, thereby ensuring that each power module can accurately execute the voltage control value allocated by the first power module.

[0023] Secondly, embodiments of this application provide a multi-module output control system, which is applicable to a power module series system. The power module series system includes N power modules connected in series. Each power module includes a first power module and at least one second power module, where N is an integer greater than 1.

[0024] The first power module is used to obtain the total output voltage and output current of the power module series system, as well as the full-load working time of each of the N power modules.

[0025] The first power supply module is further configured to calculate a first average voltage based on the total output voltage and determine the voltage range to which the first average voltage belongs.

[0026] The first power supply module is further configured to determine the distribution strategy of the total output voltage according to the voltage range to which the first average voltage belongs, and distribute the total output voltage according to the distribution strategy to obtain N voltage components.

[0027] The first power module is also used to determine the voltage component corresponding to each power module based on the full-load working time, wherein the N voltage components are mapped one-to-one with the N power modules.

[0028] The first power module is further configured to, when the first average voltage belongs to a first voltage range, take the first peak efficiency operating voltage corresponding to the first voltage range as the voltage component of M power modules among the N power modules, where M is an integer greater than or equal to 0 and less than or equal to N; and determine the voltage components of other power modules among the N power modules besides the M power modules based on the voltage components of the M power modules and the total output voltage.

[0029] In one possible design, the first power module is further configured to calculate the voltage components of the power modules other than M power modules out of the N power modules. The voltage components of the power modules other than M power modules out of the N power modules satisfy the following:

[0030]

[0031]

[0032] Wherein, the V set1 V represents the voltage component of the power modules other than the M power modules among the N power modules. total The total output voltage, V max1 This represents the first peak efficiency operating voltage corresponding to the first voltage range. This indicates rounding down to the nearest integer.

[0033] In another possible design, the first power module is further configured to, when the first average voltage belongs to the second voltage range, take the second peak efficiency operating voltage corresponding to the second voltage range as the voltage component of K power modules among the N power modules, where K is an integer greater than or equal to 0 and less than or equal to N; and determine the voltage components of the other power modules among the N power modules besides the K power modules based on the voltage components of the K power modules and the total output voltage.

[0034] In another possible design, the first power module is further configured to, when NK is greater than or equal to 2, determine the second average voltage of the other power modules (excluding the K power modules) among the N power modules based on the voltage components of the K power modules and the total output voltage; when the second average voltage belongs to the first voltage range, use the first peak efficiency operating voltage corresponding to the first voltage range as the voltage component of the P power modules among the other power modules, where P is an integer greater than or equal to 0 and less than or equal to NK; and determine the voltage components of the remaining power modules (excluding the P power modules) among the other power modules based on the voltage components of the K power modules, the voltage components of the P power modules, and the total output voltage.

[0035] In another possible design, the first power module is also used to calculate the second average voltage and the voltage components of the remaining power modules excluding the P power modules. The second average voltage satisfies:

[0036]

[0037]

[0038] The voltage components of the remaining power modules (excluding the P power modules) satisfy the following:

[0039]

[0040]

[0041] Wherein, the V set2 This represents the second average voltage, V total The total output voltage, V max2 V represents the second peak efficiency operating voltage corresponding to the second voltage range. set3 V represents the voltage components of the other power modules besides the P power modules. max1 This indicates the first peak efficiency operating voltage corresponding to the first voltage range.

[0042] In another possible design, the first power module is further configured to subtract the sum of the voltage components of the K power modules from the total output voltage when NK equals 1, to obtain the remaining voltage, and to use the remaining voltage as the voltage component of the other power modules among the N power modules besides the K power modules.

[0043] In another possible design, the first power module is also used to map the full-load operating time in ascending order to the N voltage components in descending order, so as to obtain the voltage component corresponding to each of the N power modules.

[0044] In another possible design, the first power module is further configured to determine a first output limiting current corresponding to the first power module and a second output limiting current corresponding to the second power module based on the output current.

[0045] The operation and beneficial effects of this multi-module output control system can be found in the description and beneficial effects described in the first aspect above, and will not be repeated here.

[0046] Thirdly, this application provides a multi-module output control system, which includes a communication bus, a first power supply module, and at least one second power supply module. The communication bus enables communication between the first power supply module and each of the second power supply modules. The first power supply module acquires the total output voltage and output current of the series-connected power supply system, as well as the full-load operating time of each of the N power supply modules. It calculates N voltage components based on an efficiency optimization control algorithm and the efficiency characteristic curves of the power supply modules, ensuring that most power supply modules in the series system operate at their highest efficiency point. Through a lifespan balancing control method, the full-load operating time is mapped one-to-one with the N voltage components in descending order, resulting in the voltage component corresponding to each of the N power supply modules. By dynamically adjusting the voltage component of each power supply module, the lifespan of each power supply module is balanced. The second power supply module uploads its own full-load operating time, receives the voltage components allocated by the first power supply module, and executes its own output current limiting strategy to ensure constant voltage operation. The system adopts a master-slave module control method, which controls the working status of each power module through the first power module. Based on the efficiency optimization algorithm, most power modules are made to work at their highest efficiency point. The lifespan of each power module is dynamically adjusted according to the lifespan balancing method, so as to achieve high efficiency and long lifespan of the system and improve the robustness of the system. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0048] Figure 1 This is a schematic diagram of the structure of a multi-module output control system provided in this application;

[0049] Figure 2 This is a flowchart illustrating a multi-module output control method provided in this application;

[0050] Figure 3 This is a schematic diagram of the efficiency characteristic curve of a power module provided in this application;

[0051] Figure 4 This is a schematic diagram of the series wiring method of a multi-module output control system provided in this application. Detailed Implementation

[0052] The embodiments of this application are described below with reference to the accompanying drawings.

[0053] like Figure 1 As shown, Figure 1 This is a schematic diagram of a multi-module output control system provided in an embodiment of this application. The multi-module output control system includes a communication bus 101, a first power supply module 102, and at least one second power supply module 103. The detailed descriptions of each module are as follows.

[0054] Communication bus 101 is used to connect and communicate between the first power module 102 and each of the second power modules 103, transmitting instructions and / or data signals. Communication bus 101 can be a peripheral interconnect standard PCI bus or an extended industry standard structure EISA bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 1 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0055] The first power module 102 is used to acquire the total output voltage and output current of the series power module system, as well as the full-load operating time of each of the N power modules. Based on the efficiency optimization control algorithm and the efficiency characteristic curve of the power module, N voltage components are calculated to ensure that most of the power modules in the series system operate at their highest efficiency point. Through a lifespan balancing control method, the full-load operating time is mapped one-to-one with the N voltage components in descending order to obtain the voltage component corresponding to each of the N power modules. By dynamically adjusting the voltage component of each power module, the lifespan of each power module is balanced.

[0056] The second power module 103 is used to upload its own full-load working time, receive the voltage component allocated by the first power module, and execute its own output current limiting strategy to ensure that it operates in a constant voltage state.

[0057] Optionally, the multi-module output control system may also include a monitoring system module 104, which is used to set the total output voltage and output current in the power module series system, and to control the power on / off of all power modules.

[0058] Optionally, the communication bus 101 is also used to enable communication between the monitoring system module 104 and the first power module 102 and the second power module 103.

[0059] It should be noted that the aforementioned multi-module output control system can be a user-interactive system, which can be a hardware system or a combination of hardware and software; this application does not specifically limit this. It should also be noted that... Figure 1 This is merely an illustrative structural diagram of a multi-module output control system. In practical applications, it can be modified according to specific circumstances. Figure 1 The multi-module output control system performs corresponding transformations.

[0060] like Figure 2 As shown, Figure 2 This is a flowchart illustrating a multi-module output control method provided in an embodiment of this application. The method includes, but is not limited to, the following steps:

[0061] Step S201: Obtain the total output voltage and output current of the power module series system, and the full-load operating time of each of the N power modules, where N is an integer greater than 1.

[0062] In one implementation, the system receives a voltage setting command from a monitoring system and the full-load operating time from each power module. Specifically, the multi-module output control system includes a monitoring system, which includes a voltage setting interface and a current setting interface. The user can set the total output voltage of the power module series system through the voltage setting interface and set the output current of the power module series system through the current setting interface. Each second power module sends its own full-load operating time to the first power module. The first power module obtains the full-load operating time of each power module in the series system and counts the total number N of power modules.

[0063] In another implementation, the default output voltage and default output current stored in the first power module are read, and the full-load operating time sent by each power module is received. The default output voltage is used as the total output voltage of the power module series system, and the default output current is used as the output current of the power module series system. Each second power module sends its own full-load operating time to the first power module. The first power module obtains the full-load operating time of each power module in the series system and counts the total number of power modules N.

[0064] In one embodiment, the operating time of power module A at full load output power is T0, and the operating time at the first output power is T1. The formula for calculating the full load operating time of power module A is as follows:

[0065]

[0066] Among them, T work_A T represents the full-load operating time corresponding to power module A. 0_A T represents the operating time corresponding to the full-load output power of power module A. 1_A P represents the operating time corresponding to the first output power of power module A. max P1 represents the first output power, and P2 represents the full-load output power. The calculation method for the full-load operating time of other power modules is similar, and will not be repeated here.

[0067] Optionally, other lifespan-related factors, such as ambient temperature, can be incorporated into the calculation of full-load power duration. The specific process includes: power module B operating at full load power for a duration T. 0_B The operating time of the first output power is T. 1_B The operating ambient temperature for the first output power is K. 1_B The formula for calculating the full-load operating time of power module B is as follows:

[0068]

[0069] K T =a×K 1_B +b

[0070] Among them, T work_B T represents the full-load operating time corresponding to power module B. 0_B T represents the operating time corresponding to the full-load output power of power module B. 1_B P represents the operating time corresponding to the first output power of power module B. max P1 represents the first output power, and K represents the full-load output power. T K represents the temperature coefficient of the working environment. 1_B The temperature represents the operating environment temperature corresponding to the first output power of power module B, and a and b represent parameters.

[0071] Step S202: Calculate the first average voltage based on the total output voltage, and determine the voltage range to which the first average voltage belongs.

[0072] In this embodiment, the first power module calculates a first average voltage based on the total output voltage and the total number of power modules. Then, based on the voltage range distribution of the multi-voltage level switching, the voltage range to which the first average voltage belongs is determined. The formula for calculating the first average voltage is as follows:

[0073]

[0074] Among them, V set0 V represents the first average voltage. totalThis represents the total output voltage of the power module series system, where N represents the total number of power modules.

[0075] Step S203: Determine the distribution strategy of the total output voltage according to the voltage range to which the first average voltage belongs, and distribute the total output voltage according to the distribution strategy to obtain N voltage components.

[0076] In the embodiments of this application, when a power module achieves wide output voltage, high efficiency, and wide output current capabilities, it is typically configured to switch between multiple voltage levels. For example... Figure 3 As shown, the power module's efficiency is not entirely consistent across the entire output voltage range, and may even exhibit non-linear characteristics. Depending on the voltage level switching, there are six voltage intervals across the entire output voltage range, each corresponding to a peak efficiency operating voltage V. max1 V max2 V max3 V max4 V max5 V max6 Based on the efficiency optimization control algorithm, the total output voltage allocation strategy is determined according to the voltage range to which the first average voltage belongs, and the total output voltage is allocated according to the allocation strategy.

[0077] In one implementation, when the first average voltage is less than or equal to the first peak efficiency operating voltage, the voltage range to which the first average voltage belongs is 1. The first peak efficiency operating voltage corresponding to the voltage range 1 is taken as the voltage component of M1 power modules out of N power modules, where M1 is an integer greater than or equal to 0 and less than or equal to N. Based on the voltage components of the M1 power modules and the total output voltage, the voltage components of the other power modules in the N power modules besides the M1 power modules are determined.

[0078] Among the N power modules, the voltage components of the other power modules besides the M1 power modules satisfy:

[0079]

[0080]

[0081] Among them, V set1 V represents the voltage component of the power modules other than M1 out of N power modules. total Represents the total output voltage, V max1 This represents the first peak efficiency operating voltage corresponding to voltage range 1. This indicates rounding down to the nearest integer.

[0082] In another implementation, when the first average voltage is greater than the first peak efficiency operating voltage and less than or equal to the second peak efficiency operating voltage, the voltage range to which the first average voltage belongs is 2. The second peak efficiency operating voltage corresponding to the voltage range 2 is taken as the voltage component of M2 power modules out of N power modules, where M2 is an integer greater than or equal to 0 and less than or equal to N. Based on the voltage components of the M2 power modules and the total output voltage, the voltage components of the other power modules in the N power modules besides the M2 power modules are determined.

[0083] When N-M2 is greater than or equal to 2, the second average voltage of the power modules other than the M2 power modules is determined based on the voltage components of the M2 power modules and the total output voltage. When the second average voltage belongs to voltage range 1, the first peak efficiency operating voltage corresponding to voltage range 1 is used as the voltage component of the P1 power modules among the other power modules, where P1 is an integer greater than or equal to 0 and less than or equal to N-M2. Based on the voltage components of the M2 power modules, the voltage components of the P1 power modules, and the total output voltage, the voltage components of the remaining power modules other than the P1 power modules are determined. The second average voltage satisfies the following condition:

[0084]

[0085]

[0086] The voltage components of the remaining power modules other than power module P1 satisfy the following:

[0087]

[0088]

[0089] Among them, V set2 V represents the second average voltage. total Represents the total output voltage, V max2 This represents the second peak efficiency operating voltage corresponding to voltage range 2, V. set3 V represents the voltage components of the power modules other than P1. max1 This indicates the operating voltage for the first peak efficiency corresponding to voltage range 1.

[0090] When N-M2 equals 1, the total output voltage is subtracted from the sum of the voltage components of M2 power modules to obtain the first residual voltage. The first residual voltage is used as the voltage component of the other power modules among the N power modules excluding the M2 power modules.

[0091] Wherein, the first residual voltage satisfies:

[0092] V rest1 =V total -M2×V max2

[0093] Among them, V rest1 Represents the first residual voltage, V total Represents the total output voltage, V max2 This indicates the second peak efficiency operating voltage corresponding to voltage range 2.

[0094] In another implementation, when the first average voltage is greater than the second peak efficiency operating voltage and less than or equal to the third peak efficiency operating voltage, the voltage range to which the first average voltage belongs is 3. The third peak efficiency operating voltage corresponding to the voltage range 3 is taken as the voltage component of M3 power modules out of N power modules, where M3 is an integer greater than or equal to 0 and less than or equal to N. Based on the voltage components of the M3 power modules and the total output voltage, the voltage components of the other power modules out of the N power modules are determined.

[0095] When N-M3 is greater than or equal to 2, the third average voltage of the power modules other than the M3 power modules is determined based on the voltage components of the M3 power modules and the total output voltage. When the third average voltage belongs to voltage range 2, the second peak efficiency operating voltage corresponding to voltage range 2 is used as the voltage component of the P2 power modules among the other power modules, where P2 is an integer greater than or equal to 0 and less than or equal to N-M3. When N-M3-P2 is greater than or equal to 2, the voltage components of the M3 power modules, the voltage components of the P2 power modules, and the total output voltage are determined... The fourth average voltage of the remaining power modules (excluding P2) is used. When the fourth average voltage falls within voltage range 1, the first peak efficiency operating voltage corresponding to voltage range 1 is taken as the voltage component of the remaining P3 power modules, where P3 is an integer greater than or equal to 0 and less than or equal to N-M3-P2. Based on the voltage components of M3 power modules, P2 power modules, P3 power modules, and the total output voltage, the voltage components of the remaining power modules (excluding P3) in the N-M3-P2 power modules are determined. The third average voltage satisfies the following condition:

[0096]

[0097]

[0098] The fourth average voltage satisfies:

[0099]

[0100]

[0101] The voltage components of the remaining power modules (excluding P3) in the N-M3-P2 power modules satisfy the following:

[0102]

[0103]

[0104] Among them, V set4 This represents the third average voltage, V. total Represents the total output voltage, V max3 This represents the third peak efficiency operating voltage corresponding to voltage range 3, V. set5 This represents the fourth average voltage, V. max2 This represents the second peak efficiency operating voltage corresponding to voltage range 2, V. set6 V represents the voltage component of the power modules other than the P3 power module among the N-M3-P2 power modules. max1 This indicates the operating voltage for the first peak efficiency corresponding to voltage range 1.

[0105] When N-M3-P2 equals 1, the total output voltage is subtracted from the sum of the voltage components of M3 power modules and P2 power modules to obtain the second residual voltage. This second residual voltage is used as the voltage component of the other power modules among the N-M3 power modules, excluding P2. The second residual voltage satisfies the following condition:

[0106] V rest2 =V total -M3×V max3 -P2×V max2

[0107] Among them, V rest2 Represents the second residual voltage, V total Represents the total output voltage, V max3 This represents the third peak efficiency operating voltage corresponding to voltage range 3, V. max2 This indicates the second peak efficiency operating voltage corresponding to voltage range 2.

[0108] When N-M3 equals 1, the total output voltage is subtracted from the sum of the voltage components of the M3 power modules to obtain the third residual voltage. The third residual voltage is used as the voltage component of the other power modules among the N power modules excluding the M3 power modules.

[0109] The third residual voltage satisfies:

[0110] V rest3 =V total -M3×V max3

[0111] Among them, V rest3 Represents the third residual voltage, V total Represents the total output voltage, V max3 This indicates the third peak efficiency operating voltage corresponding to voltage range 3.

[0112] In another implementation, when the first average voltage is greater than the third peak efficiency operating voltage and less than or equal to the fourth peak efficiency operating voltage, the voltage range to which the first average voltage belongs is 4. The fourth peak efficiency operating voltage corresponding to the voltage range 4 is taken as the voltage component of M4 power modules out of N power modules, where M4 is an integer greater than or equal to 0 and less than or equal to N. Based on the voltage components of the M4 power modules and the total output voltage, the voltage components of the other power modules in the N power modules besides the M4 power modules are determined.

[0113] When N-M4 is greater than or equal to 2, the fifth average voltage of the power modules other than the M4 power modules is determined based on the voltage components of the M4 power modules and the total output voltage. According to the voltage range to which the fifth average voltage belongs, the power modules are allocated according to the allocation strategy corresponding to that voltage range. The specific process is as described above for the allocation methods of voltage range 1, voltage range 2 and voltage range 3, and will not be repeated here.

[0114] When N-M4 equals 1, the total output voltage is subtracted from the sum of the voltage components of the M4 power modules to obtain the fourth residual voltage. The fourth residual voltage is used as the voltage component of the other power modules among the N power modules excluding the M4 power modules.

[0115] Among them, the fourth residual voltage satisfies:

[0116] V rest4 =V total -M4×V max4

[0117] Among them, V rest4 Represents the fourth residual voltage, V total Represents the total output voltage, V max4 This indicates the fourth peak efficiency operating voltage corresponding to voltage range 4.

[0118] In another implementation, when the first average voltage is greater than the fourth peak efficiency operating voltage and less than or equal to the fifth peak efficiency operating voltage, the voltage range to which the first average voltage belongs is 5. The fifth peak efficiency operating voltage corresponding to voltage range 5 is taken as the voltage component of M5 power modules out of N power modules, where M5 is an integer greater than or equal to 0 and less than or equal to N. Based on the voltage components of the M5 power modules and the total output voltage, the voltage components of the other power modules in the N power modules besides the M5 power modules are determined.

[0119] When N-M5 is greater than or equal to 2, the sixth average voltage of the power modules other than the M5 power modules is determined based on the voltage components of the M5 power modules and the total output voltage. According to the voltage range to which the sixth average voltage belongs, the voltage is allocated according to the allocation strategy corresponding to that voltage range. The specific process is the same as the allocation method of voltage range 1, voltage range 2, voltage range 3 and voltage range 4 mentioned above, which will not be repeated here.

[0120] When N-M5 equals 1, the total output voltage is subtracted from the sum of the voltage components of the M5 power modules to obtain the fifth residual voltage. The fifth residual voltage is used as the voltage component of the other power modules among the N power modules excluding the M5 power modules.

[0121] Among them, the fifth residual voltage satisfies:

[0122] V rest5 =V total -M5×V max5

[0123] Among them, V rest5 Represents the fifth residual voltage, V total Represents the total output voltage, V max5 This indicates the fifth peak efficiency operating voltage corresponding to voltage range 5.

[0124] In another implementation, when the first average voltage is greater than the fifth peak efficiency operating voltage and less than or equal to the sixth peak efficiency operating voltage, the voltage range to which the first average voltage belongs is 6. The sixth peak efficiency operating voltage corresponding to the voltage range 6 is taken as the voltage component of M6 power modules out of N power modules, where M6 is an integer greater than or equal to 0 and less than or equal to N. Based on the voltage components of the M6 ​​power modules and the total output voltage, the voltage components of the other power modules in the N power modules besides the M6 ​​power modules are determined.

[0125] When N-M6 is greater than or equal to 2, the sixth average voltage of the power modules other than the M6 ​​power modules is determined based on the voltage components of the M6 ​​power modules and the total output voltage. According to the voltage range to which the sixth average voltage belongs, the voltage is allocated according to the allocation strategy corresponding to that voltage range. The specific process is as described above for the allocation methods of voltage range 1, voltage range 2, voltage range 3, voltage range 4 and voltage range 5, which will not be repeated here.

[0126] When N-M6 equals 1, the total output voltage is subtracted from the sum of the voltage components of the M6 ​​power modules to obtain the sixth residual voltage. The sixth residual voltage is used as the voltage component of the other power modules among the N power modules excluding the M6 ​​power modules.

[0127] Among them, the sixth residual voltage satisfies:

[0128] V rest6 =V total -M6×V max6

[0129] Among them, V rest6 Represents the sixth residual voltage, V total Represents the total output voltage, V max6 This indicates the sixth peak efficiency operating voltage corresponding to voltage range 6.

[0130] For example, when the total output voltage of the power module series system is 9000V and the total number of power modules is 12, the calculated average voltage is 750V. The average voltage of 750V is determined to belong to voltage range 5. Following the allocation method corresponding to voltage range 5, 12 voltage components are obtained. Based on the total output voltage and the fifth peak efficiency operating voltage corresponding to voltage range 5, according to the formula... Calculations show that X equals 10. The fifth peak efficiency operating voltage corresponding to voltage range 5 is taken as the voltage component of 10 out of the 12 power supply modules. Based on NX being greater than or equal to 2, the voltage components V of the 10 power supply modules are calculated... max5 Based on the total output voltage, the average voltage of the power modules other than the 10 power modules out of the 12 power modules is calculated to be 250V. This average voltage of 250V is determined to belong to voltage range 1. Based on the aforementioned voltage range 1 allocation strategy, and according to the total output voltage, the fifth peak efficiency operating voltage corresponding to voltage range 5, and the first peak efficiency operating voltage corresponding to voltage range 1, the following formula is used: Calculations show that Y equals 2. The first peak efficiency operating voltage corresponding to voltage range 1 is taken as the voltage component of the two power modules other than the 10 power modules out of the 12 power modules.

[0131] Step S204: Based on the full-load operating time and N voltage components, determine the voltage component corresponding to each of the N power modules.

[0132] In this embodiment, the full-load operating time is mapped one-to-one with N voltage components in descending order, according to an ascending order, to obtain the voltage component corresponding to each of the N power modules. Specifically, the process includes: taking the minimum voltage among the N voltage components as the voltage component of the power module with the maximum full-load operating time, and taking the maximum voltage among the N voltage components as the voltage component of the power module with the minimum full-load operating time.

[0133] For example, when there are three power modules in a series power module system, V is calculated based on the efficiency optimization control algorithm and the total output voltage. max3 V max2and V set Three voltage components, of which V set satisfy:

[0134] V set =V total -V max3 -V max2

[0135] V set <V max2 <V max3

[0136] Among them, V total Represents the total output voltage, V max3 This represents the third peak efficiency operating voltage corresponding to voltage range 3, V. max2 This indicates the second peak efficiency operating voltage corresponding to voltage range 2.

[0137] Select the power supply module with the shortest full-load operating time and set its output voltage to V. set Take the second largest value of the full-load operating time and set the output voltage of the power module to V. max2 Set the output voltage of the remaining power module to V. max3 By allocating voltage components according to this lifespan balancing control method, the output efficiency of the series system can be maximized, while the full-load power duration in the series system can be dynamically balanced, thereby improving the fault-free operation time of the entire series system.

[0138] Step S205: Based on the output current, determine the first output limiting current corresponding to the first power supply module and the second output limiting current corresponding to the second power supply module.

[0139] In this embodiment, to ensure that each power module in the series system operates in a constant voltage state, the current output capability of the second power module is greater than that of the first power module. Based on the output current, the output current is used as the first output limiting current I corresponding to the first power module. set Set the second output current limit corresponding to the second power module to I. set +ΔI.

[0140] like Figure 4 As shown, Figure 4This is a schematic diagram of the series connection method of a multi-module output control system provided in an embodiment of this application. The multi-module output control system includes N alternating current / direct current (AC / DC) power modules (AC / DC power module 1, AC / DC power module 2, ..., AC / DC power module N), where N is an integer greater than 1. The N AC / DC power modules are connected in series for output. Taking AC / DC power module 2 as an example, one end of AC / DC power module 2 is connected to one end of diode Do_2, one end of capacitor Co_2, one end of diode Dr_2, one end of diode Do_1, one end of capacitor Co_1, and one end of AC / DC power module 1, forming the positive output terminal Vo2+ of AC / DC power module 2. The other end of AC / DC power module 2 is connected to the other end of diode Do_2, the other end of capacitor Co_2, one end of diode Do_3, one end of capacitor Co_3, and one end of... One end of the diode Dr_3 and one end of the AC / DC power module 3 are connected to form the negative output terminal Vo2- of the AC / DC power module 2. The positive output terminal Vo2+ of the AC / DC power module 2 is connected in series with the positive and negative output terminals Vo3- of the adjacent AC / DC power module 1. The negative output terminal Vo2- of the AC / DC power module 2 is connected in series with the positive output terminal Vo3+ of the adjacent AC / DC power module 3. The same principle applies to AC / DC power modules other than AC / DC power module 1 and AC / DC power module N. In this configuration, one end of AC / DC power module 1 is connected to one end of diode Do_1, one end of capacitor Co_1, one end of diode Dr_1, and the positive output terminal Vout+ of the series system, forming the positive output terminal Vo1+ of AC / DC power module 1. The other end of AC / DC power module 1 is connected to the other end of diode Do_1, the other end of capacitor Co_1, one end of diode Do_2, one end of capacitor Co_2, one end of diode Dr_2, and one end of AC / DC power module 2, forming the negative output terminal Vo1+ of AC / DC power module 1. 1-; One end of AC / DC power module N is connected to one end of diode Do_N, one end of capacitor Co_N, one end of diode Dr_N, one end of diode Do_N-1, one end of capacitor Co_N-1, and one end of AC / DC power module N-1, which is the positive output terminal VoN+ of AC / DC power module N. The other end of AC / DC power module N is connected to the other end of diode Do_N, the other end of capacitor Co_N, one end of capacitor Co_2, and the other end of load RL, which is the negative output terminal VoN- of AC / DC power module N.Furthermore, in the series circuit of the power modules, each AC / DC power module is connected to a three-phase AC input. The positive output terminal Vo1+ of AC / DC power module 1 is connected to the positive output terminal Vout+ of the series system, and the negative output terminal VoN- of AC / DC power module N is connected to the negative output terminal Vout- of the series system. The positive output terminal Vout+ of the series system is connected to one end of the load RL, and the negative output terminal Vout- of the series system is connected to the other end of the load RL. In the series system of power modules, to prevent power system oscillation caused by the startup timing problems of the AC / DC power modules, diodes are connected to the output terminals of each AC / DC power module for protection. To reduce the impact of reflected ripple on the series system, filter capacitors are used at the input terminals of each AC / DC power module for filtering.

[0141] In this embodiment, through a master-slave power module control method, the first power module, based on an efficiency optimization control algorithm and its own efficiency characteristic curve, ensures that most power modules in the series system operate at their highest efficiency point, thereby achieving optimal operating efficiency for the entire series system. The first power module, through a lifespan balancing control method, dynamically adjusts the full-load operating time of each power module by controlling its voltage components when power module lifespans are uneven, thus balancing the lifespan of each power module and significantly extending the fault-free operating time. When a deeply current-limited load is suddenly connected to the output of the series system, the output voltage of each power module can be quickly stabilized. Through the control strategy, a stable operating state with balanced output power of each power module is quickly restored, improving the robustness of the series system.

[0142] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0143] In the embodiments of this application, "multiple" refers to two or more.

[0144] The descriptions of "first," "second," etc., appearing in the embodiments of this application are for illustrative purposes and to distinguish the objects being described. They have no order and do not indicate any particular limitation on the number of objects being described in the embodiments of this application. They cannot constitute any limitation on the embodiments of this application.

[0145] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. Any modifications, equivalent substitutions, or improvements made within the principles of this application should be included within the scope of protection of this application.

Claims

1. A multi-module output control method, characterized in that, The method is applicable to a power module series system, wherein the power module series system includes N power modules connected in series, each power module including a first power module and at least one second power module, and N is an integer greater than 1. The method includes: The first power module obtains the total output voltage of the power module series system, and the full-load working time of each of the N power modules; The first power module calculates the first average voltage based on the total output voltage and determines the voltage range to which the first average voltage belongs. The first power module determines the distribution strategy of the total output voltage according to the voltage range to which the first average voltage belongs, and distributes the total output voltage according to the distribution strategy to obtain N voltage components; The first power module determines the voltage component corresponding to each power module based on the full-load working time, and the N voltage components are mapped one-to-one with the N power modules.

2. The method according to claim 1, characterized in that, The first power module determines the distribution strategy of the total output voltage based on the voltage range to which the first average voltage belongs, and distributes the total output voltage according to the distribution strategy to obtain N voltage components, including: When the first average voltage belongs to the first voltage range, the first peak efficiency operating voltage corresponding to the first voltage range is taken as the voltage component of M power modules among the N power modules, where M is an integer greater than or equal to 0 and less than or equal to N. Based on the voltage components of the M power modules and the total output voltage, determine the voltage components of the other power modules among the N power modules besides the M power modules.

3. The method according to claim 2, characterized in that, The voltage components of the power modules other than the M power modules among the N power modules satisfy: Among them, the This represents the voltage components of the power modules other than the M power modules among the N power modules. The total output voltage is represented by the following: This represents the first peak efficiency operating voltage corresponding to the first voltage range. This indicates rounding down to the nearest integer.

4. The method according to claim 1, characterized in that, The first power module determines the distribution strategy of the total output voltage based on the voltage range to which the first average voltage belongs, and distributes the total output voltage according to the distribution strategy to obtain N voltage components, including: When the first average voltage belongs to the second voltage range, the second peak efficiency operating voltage corresponding to the second voltage range is taken as the voltage component of K power modules among the N power modules, where K is an integer greater than or equal to 0 and less than or equal to N; Based on the voltage components of the K power modules and the total output voltage, determine the voltage components of the other power modules among the N power modules besides the K power modules.

5. The method according to claim 4, characterized in that, The step of determining the voltage components of the other power modules among the N power modules besides the K power modules based on the voltage components of the K power modules and the total output voltage includes: When N When K is greater than or equal to 2, the second average voltage of the other power modules among the N power modules, excluding the K power modules, is determined based on the voltage components of the K power modules and the total output voltage. When the second average voltage falls within the first voltage range, the first peak efficiency operating voltage corresponding to the first voltage range is taken as the voltage component of P power modules among the other power modules, where P is greater than or equal to 0 and less than or equal to N. K is an integer; Based on the voltage components of the K power modules, the voltage components of the P power modules, and the total output voltage, determine the voltage components of the remaining power modules other than the P power modules.

6. The method according to claim 5, characterized in that, The second average voltage satisfies: The voltage components of the remaining power modules other than the P power modules satisfy the following: Among them, the This represents the second average voltage, the The total output voltage is represented by the following: This represents the second peak efficiency operating voltage corresponding to the second voltage range. This represents the voltage components of the other power modules besides the P power modules. This indicates the first peak efficiency operating voltage corresponding to the first voltage range.

7. The method according to claim 4, characterized in that, The step of determining the voltage components of the other power modules among the N power modules besides the K power modules based on the voltage components of the K power modules and the total output voltage includes: When N When K equals 1, the total output voltage is subtracted from the sum of the voltage components of the K power modules to obtain the remaining voltage. The remaining voltage is then used as the voltage component of the other power modules among the N power modules besides the K power modules.

8. The method according to claim 1, characterized in that, The first power module determines the voltage component corresponding to each power module based on the full-load operating time. The N voltage components are mapped one-to-one with the N power modules, including: The full-load operating time is mapped one by one with the N voltage components in descending order, in ascending order, to obtain the voltage component corresponding to each of the N power modules.

9. The method according to claim 1, characterized in that, The method further includes: The first power module acquires the output current of the power module series system; Based on the output current, determine the first output limit current corresponding to the first power module and the second output limit current corresponding to the second power module.

10. A multi-module output control system, characterized in that, The system is applicable to a power module series system, which includes N power modules connected in series. Each power module includes a first power module and at least one second power module, where N is an integer greater than 1. The first power module is used to obtain the total output voltage and output current of the power module series system, as well as the full-load working time of each of the N power modules; The first power module is further configured to calculate a first average voltage based on the total output voltage and determine the voltage range to which the first average voltage belongs; The first power module is further configured to determine the distribution strategy of the total output voltage according to the voltage range to which the first average voltage belongs, and distribute the total output voltage according to the distribution strategy to obtain N voltage components; The first power module is further configured to determine the voltage component corresponding to each power module based on the full-load working time, wherein the N voltage components are mapped one-to-one with the N power modules; The first power module is further configured to determine a first output limiting current corresponding to the first power module and a second output limiting current corresponding to the second power module based on the output current.

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