Temperature detection method and device for bus reactor

Abstract

The invention discloses a temperature detection method and device for a bus reactor, relates to the technical field of reactor testing and can also be used in the technical field of rail transit, and the method comprises the following steps: determining a current value flowing through the bus reactor and voltage values at two ends of the bus reactor; determining a current internal resistance calculation value of the bus reactor based on the current value and the voltage value; and determining a current temperature calculation value of the bus reactor based on the current internal resistance calculation value and a predetermined temperature function relationship. According to the method, the current reactor temperature is solved online in real time through the preset function relation between the reactor internal resistance value and the reactor temperature, the real-time performance is good, high efficiency and reliability are achieved, temperature sensors, infrared sensors, cameras and other sensors do not need to be added, the cost is low, and the method has rich application scenes and practical value.

Description

Technical Field

[0001] This invention relates to the field of reactor testing technology, and can also be used in the field of rail transit technology, particularly to a method and apparatus for temperature detection of busbar reactors. Background Technology

[0002] With the rapid development of the rail transit industry, the electric traction system, as an important component of train power, has become crucial for ensuring the safe and reliable operation of trains. Rail transit trains commonly use converters to convert AC to DC power. The converter bus reactor, as an important electrical component on the DC side, is mainly used for filtering, limiting current surges, and stabilizing the DC bus voltage, playing a vital role in the performance and lifespan of the converter system.

[0003] However, converter busbar reactors generate significant current and heat during operation. Especially under high loads and harsh environments, their internal windings and insulation materials are prone to aging due to excessive temperature, and may even experience insulation breakdown, leading to equipment failure and train operation interruptions. Abnormal temperature is one of the main manifestations of potential reactor failures. If it cannot be effectively monitored and controlled, it will significantly impact the operational safety and maintenance costs of rail vehicles. Therefore, real-time monitoring of converter busbar reactor temperature, timely understanding of its operating status, and prevention of damage caused by excessive temperature have become important technical means and research directions for improving the intelligence and reliability of rail transit train traction systems.

[0004] The existing converter busbar reactor temperature detection scheme and its shortcomings are as follows:

[0005] (1) Installing various types of temperature sensors on the bus reactor; however, this approach requires additional temperature sensors, and a single or small number of sensors can only detect the temperature of a portion of the reactor. (2) Installing infrared or camera-type sensors around the bus reactor for temperature identification and detection; however, this approach requires additional infrared or camera sensors, typically occupying a large space in the converter and incurring high costs. (3) Utilizing machine learning algorithms to detect reactor temperature; however, this approach usually requires very complex algorithms and a large amount of training data, which is difficult to obtain in real-world fault data. To address these issues, a sensorless online temperature monitoring solution for DC reactors is urgently needed.

[0006] This section is intended to provide background or context for the embodiments of the invention set forth in the claims. The description herein is not an admission that it is prior art simply because it is included in this section. Summary of the Invention

[0007] To address at least one of the problems mentioned in the background section, this application proposes a temperature detection method and device for busbar reactors. The current reactor temperature is calculated online in real time using a preset functional relationship between the internal resistance value of the reactor and the reactor temperature. This method offers good real-time performance, high efficiency and reliability, and eliminates the need for additional sensors such as temperature, infrared, or cameras. It is low-cost and has a wide range of applications and practical value.

[0008] This invention provides a temperature detection method for a busbar reactor, the method comprising:

[0009] Determine the current value flowing through the bus reactor and the voltage value across the bus reactor;

[0010] Based on the current value and the voltage value, determine the current internal resistance value of the bus reactor;

[0011] Based on the current internal resistance calculation value and the predetermined temperature function relationship, the current temperature calculation value of the bus reactor is determined.

[0012] In some optional embodiments of this example, determining the current value flowing through the bus reactor and the voltage value across the bus reactor includes:

[0013] The current value flowing through the bus reactor is determined based on the bus current sensor connected in series with the bus reactor;

[0014] The voltage values ​​across the bus reactor are determined based on a first bus voltage sensor located at the input end of the bus reactor and a second bus voltage sensor located at the output end of the bus reactor.

[0015] In some optional embodiments of this example, determining the current internal resistance of the bus reactor based on the current value and the voltage value includes:

[0016] Based on the current value, the voltage value, and the following formula, the current internal resistance of the bus reactor is determined; wherein the formula is:

[0017]

[0018] In the formula, Let be the derivative of the current flowing through the bus reactor with respect to time; L be the inductance of the bus reactor; U be the voltage across the bus reactor; i be the current flowing through the bus reactor; R s This is the calculated value of the current internal resistance of the bus reactor.

[0019] In some optional embodiments of this example, the step of pre-determining the temperature function relationship includes:

[0020] Obtain the data sequence (R) of the bus reactor s The busbar reactor is placed in an environmental chamber, which is configured to increase from a first preset temperature to a second preset temperature in preset temperature steps. After each temperature adjustment, the temperature remains constant for a preset time until the current experimental temperature T' of the busbar reactor matches the current adjusted temperature of the environmental chamber, and the current experimental internal resistance R of the busbar reactor is determined. s ';

[0021] For the data sequence (R) s Data fitting was performed using ',T') to determine the temperature function relationship of the bus reactor. Where T is the calculated current temperature of the bus reactor.

[0022] In some alternative embodiments of this example, after determining the current calculated temperature value of the bus reactor, the method further includes:

[0023] The temperature function relationship is corrected based on the current calculated temperature and the current calculated internal resistance of the bus reactor.

[0024] In some alternative embodiments of this example, after determining the current calculated temperature value of the bus reactor, the method further includes:

[0025] Determine whether the current calculated temperature value is greater than the temperature protection threshold of the bus reactor; if it is greater, perform over-temperature protection operation on the bus reactor.

[0026] Secondly, embodiments of the present invention also provide a temperature detection device for a busbar reactor, the device comprising:

[0027] The current and voltage determination module is configured to determine the current value flowing through the bus reactor and the voltage value across the bus reactor.

[0028] The current internal resistance calculation value determination module is configured to determine the current internal resistance calculation value of the bus reactor based on the current value and the voltage value;

[0029] The current temperature calculation value determination module is configured to determine the current temperature calculation value of the bus reactor based on the current internal resistance calculation value and a pre-determined temperature function relationship.

[0030] In some alternative embodiments of this implementation, the current-voltage determination module includes:

[0031] The current determination unit is configured to determine the current value flowing through the bus reactor based on a bus current sensor connected in series with the bus reactor;

[0032] The voltage determination unit is configured to determine the voltage value across the bus reactor based on a first bus voltage sensor located at the input terminal of the bus reactor and a second bus voltage sensor located at the output terminal of the bus reactor.

[0033] Thirdly, embodiments of the present invention also provide 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 above-described method for temperature detection of a busbar reactor.

[0034] Fourthly, embodiments of the present invention also provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for temperature detection of a busbar reactor.

[0035] Fifthly, embodiments of the present invention also provide a computer program product, the computer program product including a computer program, which, when executed by a processor, implements the above-described method for temperature detection of a busbar reactor.

[0036] Thus, the present invention provides a method and apparatus for temperature detection of busbar reactors. The method and apparatus calculate the current reactor temperature online in real time by using a preset functional relationship between the internal resistance value of the reactor and the reactor temperature. It has good real-time performance, high efficiency and reliability, and does not require additional temperature, infrared, camera or other sensors. It is low in cost and has a wide range of application scenarios and practical value. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0038] Figure 1 This is one of the flowcharts illustrating a temperature detection method for a busbar reactor according to an embodiment of the present invention;

[0039] Figure 2 This is a second schematic flowchart of a temperature detection method for a busbar reactor according to an embodiment of the present invention;

[0040] Figure 3This is a schematic diagram of the environmental chamber experiment of the busbar reactor in an embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of the circuit structure of the converter in an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram illustrating the steps for determining the temperature function relationship in an embodiment of the present invention;

[0043] Figure 6 This is a third schematic flowchart of a temperature detection method for a busbar reactor according to an embodiment of the present invention;

[0044] Figure 7 This is one of the structural schematic diagrams of a temperature detection device for a busbar reactor in an embodiment of the present invention;

[0045] Figure 8 This is a second schematic diagram of a temperature detection device for a busbar reactor according to an embodiment of the present invention;

[0046] Figure 9 This is a schematic diagram of the physical structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0048] The information collected in the technical solution of this application is information and data authorized by the user or fully authorized by all parties. The collection, storage, use, processing, transmission, provision, disclosure and application of the relevant data all comply with the relevant laws, regulations and standards of the relevant countries and regions, necessary confidentiality measures have been taken, and they do not violate public order and good morals. Corresponding operation portals are provided for users to choose to authorize or refuse.

[0049] The acquisition, transmission, storage, use, and processing of data in this application comply with relevant national laws and regulations. It should be noted that certain software, components, models, and other existing industry solutions may be mentioned in the embodiments of this application. These should be considered exemplary, intended only to illustrate the feasibility of implementing the technical solution of this application, and do not imply that the applicant has already used or necessarily used such solutions.

[0050] Busbar reactors are crucial components of converters, playing a vital role in stabilizing converter voltage and current, reducing current harmonics, and improving power quality. However, busbar reactors often burn out due to overheating. Therefore, real-time and accurate temperature monitoring of busbar reactors is essential to prevent overheating and protect both the reactor and the converter.

[0051] Based on the problems mentioned in the background section, such as Figure 1 As shown, this application proposes a temperature detection method for a busbar reactor, the method comprising:

[0052] Step 10: Determine the current value flowing through the bus reactor and the voltage value across the bus reactor.

[0053] In some optional embodiments of this example, such as Figure 2 As shown, step 10, determining the current value flowing through the bus reactor and the voltage value across the bus reactor, includes:

[0054] Step 101: Determine the current value flowing through the bus reactor based on the bus current sensor connected in series with the bus reactor;

[0055] Step 102: Determine the voltage value across the bus reactor based on the first bus voltage sensor located at the input end of the bus reactor and the second bus voltage sensor located at the output end of the bus reactor.

[0056] Specifically, such as Figure 3 As shown, the converter bus reactor is equipped with a bus current sensor A connected in series; the input terminal of the converter bus reactor is equipped with a first bus voltage sensor V1, and the output terminal is equipped with a second bus voltage sensor V2. It should be noted that these sensors are typically required for the converter's own operation and are not additional components. The bus current sensor A measures the reactor current value as i, i.e., the current flowing through the bus reactor; the first bus voltage sensor V1 measures the voltage value as U1; and the second bus voltage sensor V2 measures the voltage value as U2. Therefore, the voltage across the bus reactor is U = U1 - U2.

[0057] Step 20: Based on the current value and the voltage value, determine the current internal resistance calculation value of the bus reactor.

[0058] In some optional embodiments of this example, step 20, determining the current internal resistance of the bus reactor based on the current value and the voltage value, includes:

[0059] Based on the current value, the voltage value, and the following formula, the current internal resistance of the bus reactor is determined; wherein the formula is:

[0060]

[0061] In the formula, Let be the derivative of the current flowing through the bus reactor with respect to time; L be the inductance of the bus reactor; U be the voltage across the bus reactor; i be the current flowing through the bus reactor; R s This is the calculated value of the current internal resistance of the bus reactor.

[0062] Step 30: Based on the current internal resistance calculation value and the predetermined temperature function relationship, determine the current temperature calculation value of the bus reactor.

[0063] In some optional embodiments of this example, the step of pre-determining the temperature function relationship includes:

[0064] Obtain the data sequence (R) of the bus reactor s ',T'), where, for example Figure 4 As shown, the busbar reactor is placed in an environmental chamber, and the resistance value of the reactor is measured using a resistance meter.

[0065] The environmental chamber is configured to start from a first preset temperature and increase to a second preset temperature in preset temperature steps. After each temperature adjustment, the temperature remains adjusted for a preset time until the current experimental temperature T' of the bus reactor matches the current adjusted temperature of the environmental chamber, and the current experimental internal resistance R of the bus reactor is determined. s ';

[0066] For the data sequence (R) s Data fitting was performed using ',T') to determine the temperature function relationship of the bus reactor. Where T is the calculated current temperature of the bus reactor.

[0067] Specifically, such as Figure 5 As shown, the reactor's first preset temperature and second preset temperature are set according to the reactor's application scenario or factory calibration data. The first preset temperature is the lower limit value T. L- The second preset temperature is the upper limit of the temperature, T. L+ Based on application requirements or reactor temperature measurement accuracy, set the ambient chamber temperature adjustment step size to ΔT. Set the ambient chamber temperature from the lower limit value T. L- Initially, ΔT is adjusted each time, increasing until it reaches the upper temperature limit T. L+After each temperature adjustment, allow sufficient time until the reactor temperature T matches the ambient temperature before using a resistance meter to measure the reactor resistance, thereby obtaining a series of data points related to the temperature.

[0068] Based on (R) s The data sequence T is used to obtain the functional relationship between the reactor resistance and the reactor temperature by data fitting, where T∈[T,T]. L- ,T L+ The data fitting methods here include, but are not limited to, multinomial fitting.

[0069] Taking polynomial fitting as an example, let... The above a0, a1, a2…a can be solved using methods including but not limited to the least squares method. n Thus, the functional relationship between the reactor resistance and the reactor temperature can be solved.

[0070] In some alternative embodiments of this example, after determining the current calculated temperature value of the bus reactor, the method further includes:

[0071] The temperature function relationship is corrected based on the current calculated temperature and the current calculated internal resistance of the bus reactor.

[0072] Specifically, the calculated current temperature and calculated current internal resistance of the bus reactor are compared with the experimental current temperature and experimental current internal resistance to determine an error function, and the aforementioned temperature function relationship is corrected based on this error function.

[0073] In some optional embodiments of this example, such as Figure 6 As shown, after determining the current calculated temperature value of the bus reactor, the method further includes: determining whether the current calculated temperature value is greater than the temperature protection threshold of the bus reactor; if it is greater, performing over-temperature protection operation on the bus reactor. The over-temperature protection operation includes, but is not limited to, shutdown for cooling, reducing the reactor's operating time, reducing the reactor's operating power, or strengthening the reactor's cooling measures.

[0074] Specifically, according to Solve for the internal resistance R of the reactor. s (i.e., the current calculated internal resistance value); based on the aforementioned temperature function relationship. The reactor temperature T (i.e., the current calculated temperature) is obtained online in real time to determine whether the reactor temperature T exceeds the threshold T. Li (i.e., temperature protection threshold); if exceeded, over-temperature protection measures will be implemented.

[0075] This application utilizes existing voltage and current sensors in converters to calculate the internal resistance value of the reactor. By using a preset functional relationship or curve between the reactor's internal resistance and temperature, the current reactor temperature is calculated online in real time. Protection measures are triggered when the temperature exceeds a set protection threshold. This invention calculates reactor temperature using electrical parameters, offering good real-time performance, high efficiency, and reliability. Furthermore, it eliminates the need for additional temperature, infrared, or camera sensors, resulting in low cost and broad application scenarios and practical value.

[0076] This invention also provides a temperature detection device for busbar reactors, as described in the following embodiments. Since the principle of this temperature detection method for busbar reactors is similar to that of the temperature detection method for busbar reactors, the implementation of this device can refer to the implementation of the temperature detection method for busbar reactors; repeated details will not be elaborated further.

[0077] like Figure 7 As shown, an embodiment of the present invention provides a temperature detection device for a busbar reactor, the device comprising:

[0078] The current and voltage determination module 701 is configured to determine the current value flowing through the bus reactor and the voltage value across the bus reactor.

[0079] The current internal resistance calculation value determination module 702 is configured to determine the current internal resistance calculation value of the bus reactor based on the current value and the voltage value;

[0080] The current temperature calculation value determination module 703 is configured to determine the current temperature calculation value of the bus reactor based on the current internal resistance calculation value and a pre-determined temperature function relationship.

[0081] In some optional embodiments of this example, such as Figure 8 As shown, the current and voltage determination module includes:

[0082] The current determination unit 7011 is configured to determine the current value flowing through the bus reactor based on a bus current sensor connected in series with the bus reactor.

[0083] The voltage determination unit 7012 is configured to determine the voltage value across the bus reactor based on a first bus voltage sensor disposed at the input end of the bus reactor and a second bus voltage sensor disposed at the output end of the bus reactor.

[0084] In some optional embodiments of this example, the current internal resistance calculation value determination module is further configured as follows:

[0085] Based on the current value, the voltage value, and the following formula, the current internal resistance of the bus reactor is determined; wherein the formula is:

[0086]

[0087] In the formula, Let be the derivative of the current flowing through the bus reactor with respect to time; L be the inductance of the bus reactor; U be the voltage across the bus reactor; i be the current flowing through the bus reactor; R s This is the calculated value of the current internal resistance of the bus reactor.

[0088] In some optional embodiments of this example, the step of pre-determining the temperature function relationship includes:

[0089] Obtain the data sequence (R) of the bus reactor s The busbar reactor is placed in an environmental chamber, which is configured to increase from a first preset temperature to a second preset temperature in preset temperature steps. After each temperature adjustment, the temperature remains constant for a preset time until the current experimental temperature T' of the busbar reactor matches the current adjusted temperature of the environmental chamber, and the current experimental internal resistance R of the busbar reactor is determined. s ';

[0090] For the data sequence (R) s Data fitting was performed using ',T') to determine the temperature function relationship of the bus reactor. Where T is the calculated current temperature of the bus reactor.

[0091] In some alternative embodiments of this example, the temperature detection device further includes a correction module, configured to:

[0092] After determining the current calculated temperature value of the bus reactor, the temperature function relationship is corrected based on the current calculated temperature value and the current calculated internal resistance value of the bus reactor.

[0093] In some optional embodiments of this example, the temperature detection device further includes an over-temperature protection module, configured as follows:

[0094] After determining the current calculated temperature value of the bus reactor, it is determined whether the current calculated temperature value is greater than the temperature protection threshold of the bus reactor; if it is greater, an over-temperature protection operation is performed on the bus reactor.

[0095] It should be noted that the temperature detection method and device for busbar reactors provided in the embodiments of the present invention can be used in the field of rail transit, or in any technical field other than rail transit. The embodiments of the present invention do not limit the application field of the temperature detection method and device for busbar reactors.

[0096] According to embodiments of this disclosure, this disclosure also provides an electronic device, a readable storage medium, and a computer program product.

[0097] An electronic device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the steps of the temperature detection method for a busbar reactor described in the foregoing embodiments.

[0098] A non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to cause a computer to perform the steps of the temperature detection method for a busbar reactor described in the foregoing embodiments.

[0099] A computer program product includes a computer program / instructions that, when executed by a processor, implement the steps of the temperature detection method for a busbar reactor described in the foregoing embodiments.

[0100] Figure 9 A schematic block diagram of an example electronic device 900 that can be used to implement embodiments of the present disclosure is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the present disclosure described and / or claimed herein.

[0101] like Figure 9 As shown, device 900 includes a computing unit 901, which can perform various appropriate actions and processes based on a computer program stored in read-only memory (ROM) 902 or a computer program loaded from storage unit 908 into random access memory (RAM) 903. RAM 903 may also store various programs and data required for the operation of device 900. The computing unit 901, ROM 902, and RAM 903 are interconnected via bus 904. Input / output (I / O) interface 905 is also connected to bus 904.

[0102] Multiple components in device 900 are connected to I / O interface 905, including: input unit 906, such as keyboard, mouse, etc.; output unit 907, such as various types of monitors, speakers, etc.; storage unit 908, such as disk, optical disk, etc.; and communication unit 909, such as network card, modem, wireless transceiver, etc. Communication unit 909 allows device 900 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0103] The computing unit 901 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the computing unit 901 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The computing unit 901 performs the various methods and processes described above, such as the steps of a temperature detection method for a busbar reactor.

[0104] For example, in some embodiments, a temperature detection method for a busbar reactor can be implemented as a computer software program tangibly contained in a machine-readable medium, such as storage unit 908. In some embodiments, part or all of the computer program can be loaded and / or installed on device 900 via ROM 902 and / or communication unit 909. When the computer program is loaded into RAM 903 and executed by computing unit 901, one or more steps of the temperature detection method for a busbar reactor described above can be performed. Alternatively, in other embodiments, computing unit 901 can be configured to perform a temperature detection method for a busbar reactor by any other suitable means (e.g., by means of firmware).

[0105] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0106] The program code used to implement the methods of this disclosure may be written in any combination of one or more programming languages. This program code may be provided to a processor or controller of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus, such that when executed by the processor or controller, the program code causes the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code may be executed entirely on a machine, partially on a machine, as a standalone software package partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0107] In the context of this disclosure, a machine-readable medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0108] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device for displaying information to the user (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor); and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the computer. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0109] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as a data server), or computing systems that include middleware components (e.g., an application server), or computing systems that include frontend components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with embodiments of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., a communication network). Examples of communication networks include local area networks (LANs), wide area networks (WANs), and the Internet.

[0110] Computer systems can include clients and servers. Clients and servers are generally located far apart and typically interact via communication networks. Client-server relationships are created by computer programs running on the respective computers and having a client-server relationship with each other. Servers can be cloud servers, servers in distributed systems, or servers incorporating blockchain technology.

[0111] It should be noted that in the description of this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 said element.

[0112] In the embodiments of this application, the singular forms "a," "the," etc., including the plural forms, should be broadly understood as "a kind" or "a class" rather than limited to the meaning of "an." Furthermore, the term "the" should be understood to include both the singular and plural forms, unless the context explicitly indicates otherwise. Additionally, the term "according to" should be understood as "at least partially based on…," and the term "based on" should be understood as "at least partially based on…," unless the context explicitly indicates otherwise.

[0113] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this disclosure can be achieved, and this is not limited herein.

[0114] The specific embodiments described above do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A method for temperature detection of a busbar reactor, characterized in that, include: Determine the current value flowing through the bus reactor and the voltage value across the bus reactor; Based on the current value and the voltage value, determine the current internal resistance value of the bus reactor; Based on the current internal resistance calculation value and the predetermined temperature function relationship, the current temperature calculation value of the bus reactor is determined.

2. The method according to claim 1, characterized in that, Determining the current value flowing through the bus reactor and the voltage value across the bus reactor includes: The current value flowing through the bus reactor is determined based on the bus current sensor connected in series with the bus reactor; The voltage values ​​across the bus reactor are determined based on a first bus voltage sensor located at the input end of the bus reactor and a second bus voltage sensor located at the output end of the bus reactor.

3. The method according to claim 1, characterized in that, The step of determining the current internal resistance of the bus reactor based on the current value and the voltage value includes: Based on the current value, the voltage value, and the following formula, the current internal resistance of the bus reactor is determined; wherein the formula is: In the formula, Let be the derivative of the current flowing through the bus reactor with respect to time; L be the inductance of the bus reactor; U be the voltage across the bus reactor; i be the current flowing through the bus reactor; R s This is the calculated value of the current internal resistance of the bus reactor.

4. The method according to claim 1, characterized in that, The steps for pre-determining the temperature function relationship include: Obtain the data sequence (R) of the bus reactor s The busbar reactor is placed in an environmental chamber, which is configured to increase from a first preset temperature to a second preset temperature in preset temperature steps. After each temperature adjustment, the temperature remains constant for a preset time until the current experimental temperature T' of the busbar reactor matches the current adjusted temperature of the environmental chamber, and the current experimental internal resistance R of the busbar reactor is determined. s '; For the data sequence (R) s Data fitting was performed using ',T') to determine the temperature function relationship of the bus reactor. Where T is the calculated current temperature of the bus reactor.

5. The method according to claim 1, characterized in that, After determining the current calculated temperature value of the bus reactor, the method further includes: Determine whether the current calculated temperature value is greater than the temperature protection threshold of the bus reactor; If the temperature exceeds the specified value, over-temperature protection will be applied to the bus reactor.

6. A temperature detection device for a busbar reactor, characterized in that, include: The current and voltage determination module is configured to determine the current value flowing through the bus reactor and the voltage value across the bus reactor. The current internal resistance calculation value determination module is configured to determine the current internal resistance calculation value of the bus reactor based on the current value and the voltage value; The current temperature calculation value determination module is configured to determine the current temperature calculation value of the bus reactor based on the current internal resistance calculation value and a pre-determined temperature function relationship.

7. The apparatus according to claim 6, characterized in that, The current and voltage determination module includes: The current determination unit is configured to determine the current value flowing through the bus reactor based on a bus current sensor connected in series with the bus reactor; The voltage determination unit is configured to determine the voltage value across the bus reactor based on a first bus voltage sensor located at the input terminal of the bus reactor and a second bus voltage sensor located at the output terminal of the bus reactor.

8. 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 computer program, it implements a temperature detection method for a busbar reactor as described in any one of claims 1 to 5.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements a temperature detection method for a busbar reactor as described in any one of claims 1 to 5.

10. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements a temperature detection method for a busbar reactor as described in any one of claims 1 to 5.

Images