Bus current limiting method, apparatus, converter, power supply system, and electronic device

Abstract

This application discloses a bus current limiting method, device, converter, power supply system, and electronic equipment, belonging to the field of converter control technology. The method includes: acquiring the current operating data of the converter and acquiring a target operating limit value for the converter under the current operating conditions; acquiring at least two bus voltage reference values, each bus voltage reference value satisfying different preset operating conditions, the bus voltage reference values ​​being determined based on at least one of the current operating data and the target operating limit value; determining a target bus voltage reference value based on the at least two bus voltage reference values; and adjusting the bus voltage of the converter based on the target bus voltage reference value to make the bus current of the converter less than the bus current limit value. This method can effectively control the bus current within the allowable range, ensuring the stable operation of the converter and helping to reduce the probability of failure.

Description

Technical Field

[0001] This application belongs to the field of converter control technology, and particularly relates to a bus current limiting method, device, converter, power supply system and electronic equipment. Background Technology

[0002] With the rapid development of technologies such as photovoltaics and energy storage, inverters and converters, which realize power conversion, are increasingly widely used. During the operation of the converter, if the bus current exceeds the allowable range, it will trigger an overcurrent protection (OCP) fault, which will lead to system shutdown or even equipment damage. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a bus current limiting method, device, converter, power supply system, and electronic equipment, which can effectively control the bus current within the allowable range, ensure the stable operation of the converter, and help reduce the probability of failure.

[0004] In a first aspect, this application provides a bus current limiting method for a converter having a bus, the method comprising: Obtain the current operating data of the converter and obtain the target operating limit of the converter under the current operating conditions; At least two bus voltage reference values ​​are obtained, each bus voltage reference value satisfies different preset operating conditions, and the bus voltage reference values ​​are determined based on at least one of the current operating data and the target operating limit; The target bus voltage reference value is determined based on the at least two bus voltage reference values. Based on the target bus voltage reference value, the bus voltage of the converter is adjusted so that the bus current of the converter is less than the bus current limit.

[0005] According to the bus current limiting method of this application, by acquiring the current operating data of the converter and the target operating limit under the current operating conditions, at least two bus voltage reference values ​​that meet different preset operating conditions are calculated. The bus voltage reference values ​​are adaptively adjusted according to different preset operating conditions. The target bus voltage reference value is determined based on the at least two bus voltage reference values. The bus voltage is adjusted according to the target bus voltage reference value so that the bus current of the converter is less than the bus current limit. The bus current can be effectively controlled within the allowable range, ensuring the stable operation of the converter, helping to reduce the probability of failure, and reducing the risk of shutdown or even machine damage caused by OCP.

[0006] According to one embodiment of this application, the current operating data includes the current output voltage of the converter, and the preset operating conditions include the converter operating at its optimal efficiency point; The acquisition of at least two bus voltage reference values ​​includes: Based on the current output voltage, a first bus voltage reference value is determined that satisfies the requirement for the converter to operate at its optimal efficiency point.

[0007] According to one embodiment of this application, determining a first bus voltage reference value that satisfies the condition of the converter operating at its optimal efficiency point based on the current output voltage includes: Obtain the voltage compensation value corresponding to the optimal efficiency point of the converter; Based on the current output voltage and the voltage compensation value, a reference value for the first bus voltage is determined.

[0008] According to one embodiment of this application, the current operating data includes the current output voltage of the converter, the target operating limit includes the output current limit of the converter and the bus current limit, and the preset operating condition includes the converter's full power output; Based on the current output voltage, the output current limit, and the bus current limit, a second bus voltage reference value is determined to satisfy the full power output of the converter.

[0009] According to one embodiment of this application, determining a second bus voltage reference value that satisfies the full-power output of the converter based on the current output voltage, the output current limit, and the bus current limit includes: Application formula

[0010] Determine the reference value for the second bus voltage; in, This is the reference value for the second bus voltage. The current output voltage, The output current limit is... This refers to the bus current limit. The converter efficiency is given.

[0011] According to one embodiment of this application, determining the target bus voltage reference value based on the at least two bus voltage reference values ​​includes: The maximum value among the at least two bus voltage reference values ​​is used as the target bus voltage reference value.

[0012] Secondly, this application provides a bus current limiting device for a converter having a bus, the device comprising: The first processing module is used to obtain the current operating data of the converter and to obtain the target operating limit of the converter under the current operating conditions. The second processing module is used to acquire at least two bus voltage reference values, each of which satisfies different preset operating conditions. The bus voltage reference values ​​are determined based on at least one of the current operating data and the target operating limit. The third processing module is used to determine the target bus voltage reference value based on the at least two bus voltage reference values. The fourth processing module is used to adjust the bus voltage of the converter based on the target bus voltage reference value, so that the bus current of the converter is less than the bus current limit.

[0013] Thirdly, this application provides a converter having a bus, the converter including a bus current limiting device as described in the second aspect above.

[0014] Fourthly, this application provides a power supply system including the converter as described in the third aspect above.

[0015] Fifthly, this application provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the bus current limiting method as described in the first aspect above.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is one of the flowcharts illustrating the bus current limiting method provided in the embodiments of this application; Figure 2 This is a second schematic flowchart of the bus current limiting method provided in the embodiments of this application; Figure 3 This is a schematic diagram of the bus current limiting device provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0019] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0020] The bus current limiting method, bus current limiting device, converter, power supply system, electronic equipment, and readable storage medium provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0021] The bus current limiting method is used in converters with buses and can be implemented by hardware or software within the converter.

[0022] A converter is a power conversion device that converts one form of electrical energy into another, such as an inverter or converter.

[0023] Converters with buses can achieve centralized transmission and distribution of energy through the buses, and can be divided into DC buses and AC buses.

[0024] The bus current limiting method provided in this application can effectively control the bus current within the allowable range, ensure the stable operation of the converter, help reduce the probability of fault occurrence, and reduce the risk of OCP causing shutdown or even machine damage.

[0025] like Figure 1 As shown, the bus current limiting method includes steps 110, 120, 130 and 140.

[0026] Step 110: Obtain the current operating data of the converter and obtain the target operating limit of the converter under the current operating conditions.

[0027] The current operating data refers to the actual operating data measured by the converter at the current moment, reflecting the real-time operating status of the converter.

[0028] In actual operation, the current operating data of the converter may include the current output voltage, current input voltage, current bus voltage, current input current, current output current, operating frequency, temperature value, etc.

[0029] Current operating conditions refer to the state conditions and external environment in which the converter operates, such as operating mode and load type. Target operating limits refer to the upper and lower limits of the operating data allowed by the converter under the current operating conditions. If the converter's operating data exceeds the target operating limits, it may trigger protection actions or cause equipment damage.

[0030] In practice, target operating limits may include output current limits, bus current limits, overvoltage protection thresholds, undervoltage protection thresholds, upper power limit, and lower power limit under the current operating conditions.

[0031] Step 120: Obtain at least two bus voltage reference values.

[0032] Each bus voltage reference value meets different preset operating conditions, and the bus voltage reference value is determined based on at least one of the current operating data and the target operating limit.

[0033] It should be noted that the preset operating conditions are the expected operating goals or optimization directions to be achieved under the current operating conditions of the converter, such as operating at the optimal efficiency point, maintaining maximum power output, maintaining the lowest harmonic distortion, etc.; the bus voltage reference value that satisfies a certain preset operating condition refers to the bus voltage value that enables the converter to operate under that preset operating condition.

[0034] In this step, at least two bus voltage reference values ​​that meet different preset operating conditions are obtained based on the current operating data and / or target operating limits.

[0035] For example, based on the current operating data, obtain the bus voltage reference value that meets the first preset operating condition; based on the target operating limit, obtain the bus voltage reference value that meets the second preset operating condition; based on the current operating data and the target operating limit, obtain the bus voltage reference value that meets the third preset operating condition.

[0036] Step 130: Determine the target bus voltage reference value based on at least two bus voltage reference values.

[0037] In this step, the target bus voltage reference value of the converter is determined based on at least two bus voltage reference values ​​that meet different preset operating conditions, so as to use the target bus voltage reference value as the voltage setting value of the bus.

[0038] In practice, one of the at least two bus voltage reference values ​​can be selected as the target bus voltage reference value.

[0039] Step 140: Based on the target bus voltage reference value, adjust the converter bus voltage so that the converter bus current is less than the bus current limit.

[0040] Among them, the bus current limit refers to the maximum current value of the bus when the converter is operating safely.

[0041] It should be noted that the value of the bus current limit can be adjusted according to the real-time operating conditions of the converter.

[0042] In this step, the converter's bus voltage is adjusted according to the target bus voltage reference value. By controlling the converter's bus voltage, the converter's bus current is limited to the allowable range, that is, the converter's bus current is less than the bus current limit.

[0043] In actual implementation, the actual value of the bus current can be compared with the expected target value (i.e., the target bus voltage reference value). The converter can be adjusted according to the deviation of the bus current so that the actual value continuously approaches and stabilizes near the target value.

[0044] In related technologies, there are two common methods for limiting BUS current: Firstly, reducing the BUS current by lowering the output power has a certain delay, and overcurrent may still occur in a short period of time. At the same time, reducing the output power also sacrifices machine performance. Secondly, by raising the BUS voltage to its maximum, BUS overcurrent can be avoided, but excessively high BUS voltage will reduce machine efficiency.

[0045] In this embodiment, the current operating data of the converter and the target operating limit under the current operating conditions are obtained. Based on the operating state conditions of the converter and the external environment, combined with the converter's own operating data, at least two bus voltage reference values ​​that meet different preset operating conditions are calculated. A target bus voltage reference value is selected from the at least two bus voltage reference values, and the bus voltage is adjusted according to the target bus voltage reference value. The range of the bus voltage is automatically adjusted to limit the bus current within the allowable range. Unlike the methods of simply reducing power or increasing voltage in related technologies, the bus voltage reference value of the converter is adaptively adjusted according to different preset operating conditions. It can respond promptly to changes in the external environment. Voltage adjustment can reduce the risk of short-term overcurrent caused by control delay, effectively control the bus current within the allowable range, ensure the stable operation of the converter, help reduce the probability of failure, and reduce the risk of shutdown or even machine damage caused by OCP.

[0046] According to the bus current limiting method provided in this application embodiment, by acquiring the current operating data of the converter and the target operating limit under the current operating conditions, at least two bus voltage reference values ​​that meet different preset operating conditions are calculated. The bus voltage reference values ​​are adaptively adjusted according to different preset operating conditions. The target bus voltage reference value is determined based on the at least two bus voltage reference values. The bus voltage is adjusted according to the target bus voltage reference value so that the bus current of the converter is less than the bus current limit. The bus current can be effectively controlled within the allowable range, ensuring the stable operation of the converter, helping to reduce the probability of fault occurrence, and reducing the risk of OCP causing shutdown or even machine damage.

[0047] The embodiments of this application will be described in detail below from two different implementation perspectives.

[0048] 1. Reference value of the first bus voltage corresponding to the converter operating at its optimal efficiency point.

[0049] In some embodiments, the current operating data includes the current output voltage of the converter, and the preset operating conditions include the converter operating at its optimal efficiency point; Obtain at least two bus voltage reference values, including: Based on the current output voltage, determine the first bus voltage reference value that satisfies the requirement for the converter to operate at its optimal efficiency point.

[0050] The optimal efficiency point refers to the operating state of the converter when the power conversion efficiency reaches its highest value under certain operating conditions; it can also be called the operating point with the highest efficiency.

[0051] It should be noted that the efficiency loss of the converter (including conduction loss, switching loss, core loss, etc.) is related to the conversion ratio between the bus voltage and the output voltage. There exists an optimal voltage conversion ratio that minimizes the total loss.

[0052] In this embodiment, a reference value for the first bus voltage is determined based on the current output voltage of the converter. By adjusting the voltage conversion ratio, various losses of the converter are balanced, so that the converter can operate at its most efficient operating point.

[0053] In some embodiments, determining a first bus voltage reference value that satisfies the requirement of the converter operating at its optimal efficiency point, based on the current output voltage, includes: Obtain the voltage compensation value corresponding to the point where the converter operates at its optimal efficiency; Based on the current output voltage and voltage compensation value, determine the reference value of the first bus voltage.

[0054] It should be noted that the voltage compensation value can be used as an optimized voltage variable superimposed on the current output voltage. After superimposing the voltage compensation value on the current output voltage, the conversion ratio between the converter's bus voltage and output voltage reaches the optimal level, allowing the converter to operate at its best efficiency point.

[0055] The current output voltage is the actual measured value. By pre-calibrating the voltage compensation value corresponding to the converter's optimal efficiency point under different output voltages, a mapping relationship between the output voltage and the voltage compensation value can be constructed. The voltage compensation value corresponding to the current output voltage can be determined by looking up a table or calculating using a mathematical model.

[0056] In actual operation, the reference value of the first bus voltage can be equal to the sum of the current output voltage and the voltage compensation value.

[0057] For example, the formula for calculating the reference value of the first bus voltage is as follows:

[0058] in, This is the current output voltage. This is the voltage compensation value. This is the reference value for the voltage of the first bus.

[0059] In this embodiment, a voltage compensation value is superimposed on the current output voltage to obtain a first bus voltage reference value. The bus voltage reference value is adjusted in real time following the current output voltage to meet the preset operating condition that the converter operates at the optimal efficiency point.

[0060] II. Reference value of the second bus voltage corresponding to the full power output of the converter.

[0061] In some embodiments, the current operating data includes the current output voltage of the converter, the target operating limits include the output current limit and the bus current limit of the converter, and the preset operating conditions include the converter's full power output; Based on the current output voltage, output current limit, and bus current limit, determine the reference value of the second bus voltage that satisfies the full power output of the converter.

[0062] Among them, the bus current limit refers to the maximum current value of the bus when the converter is operating safely, and the output current limit refers to the maximum current value that the converter is allowed to output under the current operating conditions.

[0063] It is understandable that the converter's full power output refers to the converter operating at the maximum output power allowed under the current operating conditions. The bus voltage reference value is adjusted according to the power state to adapt to different power environments.

[0064] For example, in a photovoltaic system, the converter adjusts the bus voltage according to the reference value of the second bus voltage corresponding to full power output under high power conditions with sufficient sunlight. By boosting the voltage in advance to limit the bus current, the bus can maintain stable operation while outputting full power.

[0065] In this embodiment, the converter's output current limit, bus current limit, and conversion efficiency are related to the current operating conditions. Based on the converter's current output voltage, output current limit, and bus current limit, the second bus voltage reference value is adjusted in real time so that the converter can output at full power.

[0066] In some embodiments, a second bus voltage reference value that satisfies the converter's full-power output is determined based on the current output voltage, output current limit, and bus current limit, including: Application formula

[0067] Determine the reference value for the second bus voltage; in, This is the reference value for the second bus voltage. This is the current output voltage. For output current limit, For bus current limits, The converter efficiency.

[0068] It should be noted that the output power of the converter is determined based on the output voltage and output current. The ratio of the bus power to the output power is related to the conversion efficiency. The product of the current output voltage and output current limits represents the maximum power that the converter can output. Based on the law of conservation of power, the reference value of the second bus voltage that satisfies the preset operating condition of full power output can be calculated in reverse. Under the premise that the converter bus current does not exceed the bus current limit, the converter can achieve full power output.

[0069] In some embodiments, determining a target bus voltage reference value based on at least two bus voltage reference values ​​includes: Use the maximum value among at least two bus voltage reference values ​​as the target bus voltage reference value.

[0070] In this embodiment, the maximum value is selected from at least two bus voltage reference values ​​that meet different preset operating conditions as the target bus voltage reference value. This increases the bus voltage while reducing current stress and overcurrent risk under the same power transmission conditions.

[0071] Taking the determination of the target bus voltage reference value based on the first bus voltage reference value and the second bus voltage reference value of the converter as an example.

[0072] like Figure 2As shown, read the maximum allowable BUS current value of the converter, i.e., the bus current limit. Read the maximum allowable output current value of the converter, i.e., the output current limit. The real-time output voltage of the sampling converter, i.e., the current output voltage. .in, Based on real-time output voltage The magnitude of the value is used to calculate the reference value of the first bus voltage corresponding to the converter operating at its optimal efficiency point. ,in, This is the voltage compensation value.

[0073] Based on the maximum output power allowed by the current environment, calculate the reference value of the second bus voltage corresponding to the full-power output of the converter. ,in, The converter efficiency.

[0074] In this embodiment, according to and The larger value is taken as the target bus voltage reference value of the converter. .

[0075] When the converter's output voltage is high , The converter operates at its optimal efficiency point, which is an efficiency-first mode, and the bus current is effectively limited to the allowable range.

[0076] When the converter's output voltage is low and its output power is high , When the converter's bus current is close to the bus current limit, it is in power priority mode to ensure the converter outputs full power.

[0077] The following are some specific embodiments to fully describe the technical solution of this application, but the protection scope of this application is not limited to the specific implementation methods described in these embodiments.

[0078] Example 1: A certain energy storage power station 1, battery voltage (i.e., current output voltage) The voltage is 420V, and the allowable charging current limit (i.e., output current limit) is... The bus current limit is 200A. It is 180A.

[0079] Reference value of the first bus voltage corresponding to the optimal efficiency point It is 450V.

[0080] Considering bus current limitations, Take 97% of the second bus voltage reference value corresponding to full power output. It is 481V.

[0081] In this embodiment, the target bus voltage reference value With the voltage set to 481V, the converter operates in power priority mode, which can limit the bus current to within 180A.

[0082] Example 2: A certain energy storage power station 2, battery voltage (i.e., current output voltage) The voltage is 600V, and the allowable charging current limit (i.e., output current limit) is... The bus current limit is 150A. It is 180A.

[0083] Reference value of the first bus voltage corresponding to the optimal efficiency point It is 630V.

[0084] Considering bus current limitations, Take 97% of the second bus voltage reference value corresponding to full power output. It is 515V.

[0085] Target bus voltage reference value A voltage greater than 515V can limit the bus current to within 180A. The converter has an optimal efficiency of 97.8% at 630V, which is higher than 97.6% at 515V. The final target bus voltage reference value is... The voltage is set to 630V, and the converter operates in efficiency-first mode.

[0086] The bus current limiting method provided in this application can be executed by a bus current limiting device. This application uses the example of a bus current limiting device executing the bus current limiting method to illustrate the bus current limiting device provided in this application.

[0087] This application also provides a bus current limiting device for use in a converter having a bus.

[0088] like Figure 3 As shown, the bus current limiting device includes: The first processing module 310 is used to obtain the current operating data of the converter and obtain the target operating limit of the converter under the current operating conditions. The second processing module 320 is used to acquire at least two bus voltage reference values, each of which satisfies different preset operating conditions. The bus voltage reference values ​​are determined based on at least one of the current operating data and the target operating limit. The third processing module 330 is used to determine the target bus voltage reference value based on at least two bus voltage reference values; The fourth processing module 340 is used to adjust the converter's bus voltage based on the target bus voltage reference value so that the converter's bus current is less than the bus current limit.

[0089] According to the bus current limiting device provided in the embodiments of this application, by acquiring the current operating data of the converter and the target operating limit under the current operating conditions, at least two bus voltage reference values ​​that meet different preset operating conditions are calculated. The bus voltage reference values ​​are adaptively adjusted according to different preset operating conditions. The target bus voltage reference value is determined based on the at least two bus voltage reference values. The bus voltage is adjusted according to the target bus voltage reference value so that the bus current of the converter is less than the bus current limit. The bus current can be effectively controlled within the allowable range, ensuring the stable operation of the converter, helping to reduce the probability of failure and reducing the risk of shutdown or even machine damage caused by OCP.

[0090] In some embodiments, the current operating data includes the current output voltage of the converter, and the preset operating conditions include the converter operating at its optimal efficiency point; the second processing module 320 is used to determine a first bus voltage reference value that satisfies the requirement that the converter operates at its optimal efficiency point based on the current output voltage.

[0091] In some embodiments, the second processing module 320 is used to obtain the voltage compensation value corresponding to the converter operating at the optimal efficiency point; and to determine the first bus voltage reference value based on the current output voltage and the voltage compensation value.

[0092] In some embodiments, the current operating data includes the current output voltage of the converter, the target operating limit includes the output current limit and the bus current limit of the converter, and the preset operating conditions include the full power output of the converter; the second processing module 320 is used to determine a second bus voltage reference value that satisfies the full power output of the converter based on the current output voltage, the output current limit and the bus current limit.

[0093] In some embodiments, the second processing module 320 is used to apply the formula.

[0094] Determine the reference value for the second bus voltage; in, This is the reference value for the second bus voltage. This is the current output voltage. For output current limit, For bus current limits, The converter efficiency.

[0095] In some embodiments, the third processing module 330 is configured to use the maximum value among at least two bus voltage reference values ​​as the target bus voltage reference value.

[0096] The bus current limiting device in the embodiments of this application can be an electronic device or a component in an electronic device, such as an integrated circuit or a chip.

[0097] The bus current limiting device provided in this application embodiment can realize the various processes implemented in the above-described bus current limiting method embodiment. To avoid repetition, it will not be described again here.

[0098] This application also provides a converter having a bus and including the bus current limiting device as described above.

[0099] According to the converter provided in the embodiments of this application, by acquiring the current operating data of the converter and the target operating limit under the current operating conditions, at least two bus voltage reference values ​​that meet different preset operating conditions are calculated. The bus voltage reference values ​​are adaptively adjusted according to different preset operating conditions. The target bus voltage reference value is determined based on the at least two bus voltage reference values. The bus voltage is adjusted according to the target bus voltage reference value so that the bus current of the converter is less than the bus current limit. The bus current can be effectively controlled within the allowable range, ensuring the stable operation of the converter, helping to reduce the probability of failure and reduce the risk of shutdown or even machine damage caused by OCP.

[0100] This application also provides a power supply system, including the converter as described above.

[0101] This power supply system can be a photovoltaic system, a photovoltaic-storage system, an energy storage system, a photovoltaic-storage-charging system, etc., and can support off-grid operation and grid-connected operation modes.

[0102] According to the power supply system provided in the embodiments of this application, by acquiring the current operating data of the converter and the target operating limit under the current operating conditions, at least two bus voltage reference values ​​that meet different preset operating conditions are calculated. The bus voltage reference values ​​are adaptively adjusted according to different preset operating conditions. The target bus voltage reference value is determined based on the at least two bus voltage reference values. The bus voltage is adjusted according to the target bus voltage reference value so that the bus current of the converter is less than the bus current limit. The bus current can be effectively controlled within the allowable range, ensuring the stable operation of the converter, helping to reduce the probability of fault occurrence, and reducing the risk of OCP causing shutdown or even machine damage.

[0103] In some embodiments, such as Figure 4As shown, this application embodiment also provides an electronic device 400, including a processor 401, a memory 402, and a computer program stored in the memory 402 and executable on the processor 401. When the program is executed by the processor 401, it implements the various processes of the above-described bus current limiting method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0104] It should be noted that the electronic devices in the embodiments of this application include the mobile electronic devices and non-mobile electronic devices described above.

[0105] This application also provides a non-transitory computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the above-described bus current limiting method embodiments and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0106] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0107] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described bus current limiting method.

[0108] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0109] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the various processes of the above-described bus current limiting method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0110] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0111] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0112] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the related technology, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0113] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0114] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

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

Claims

1. A method for limiting bus current, characterized in that, The method is used for a converter with a bus, and the method includes: Obtain the current operating data of the converter and obtain the target operating limit of the converter under the current operating conditions; At least two bus voltage reference values ​​are obtained, each bus voltage reference value satisfies different preset operating conditions, and the bus voltage reference values ​​are determined based on at least one of the current operating data and the target operating limit; The target bus voltage reference value is determined based on the at least two bus voltage reference values. Based on the target bus voltage reference value, the bus voltage of the converter is adjusted so that the bus current of the converter is less than the bus current limit.

2. The bus current limiting method according to claim 1, characterized in that, The current operating data includes the current output voltage of the converter, and the preset operating conditions include the converter operating at its optimal efficiency point; The acquisition of at least two bus voltage reference values ​​includes: Based on the current output voltage, a first bus voltage reference value is determined that satisfies the requirement for the converter to operate at its optimal efficiency point.

3. The bus current limiting method according to claim 2, characterized in that, Determining a first bus voltage reference value that satisfies the condition of the converter operating at its optimal efficiency point based on the current output voltage includes: Obtain the voltage compensation value corresponding to the optimal efficiency point of the converter; Based on the current output voltage and the voltage compensation value, a reference value for the first bus voltage is determined.

4. The bus current limiting method according to claim 1, characterized in that, The current operating data includes the current output voltage of the converter, the target operating limit includes the output current limit of the converter and the bus current limit, and the preset operating condition includes the converter's full power output; Based on the current output voltage, the output current limit, and the bus current limit, a second bus voltage reference value is determined to satisfy the full power output of the converter.

5. The bus current limiting method according to claim 4, characterized in that, The step of determining a second bus voltage reference value that satisfies the full-power output of the converter based on the current output voltage, the output current limit, and the bus current limit includes: Application formula Determine the reference value for the second bus voltage; in, This is the reference value for the second bus voltage. The current output voltage, The output current limit is... This refers to the bus current limit. The converter efficiency is given.

6. The bus current limiting method according to any one of claims 1-5, characterized in that, Determining the target bus voltage reference value based on the at least two bus voltage reference values ​​includes: The maximum value among the at least two bus voltage reference values ​​is used as the target bus voltage reference value.

7. A bus current limiting device, characterized in that, The device is used in a converter having a busbar, and the device includes: The first processing module is used to obtain the current operating data of the converter and to obtain the target operating limit of the converter under the current operating conditions. The second processing module is used to acquire at least two bus voltage reference values, each of which satisfies different preset operating conditions. The bus voltage reference values ​​are determined based on at least one of the current operating data and the target operating limit. The third processing module is used to determine the target bus voltage reference value based on the at least two bus voltage reference values. The fourth processing module is used to adjust the bus voltage of the converter based on the target bus voltage reference value, so that the bus current of the converter is less than the bus current limit.

8. A converter, characterized in that, The converter has a bus, and the converter includes the bus current limiting device as described in claim 7.

9. A power supply system, characterized in that, Includes the converter as described in claim 8.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the bus current limiting method as described in any one of claims 1-6.

Images