A method and system for thermal management of a high power IGBT rectifier

Abstract

The present application relates to the technical field of rectifier, specifically to a kind of heat management method and system of high-power IGBT rectifier, method includes the following steps: obtaining the rectifier to be carried out heat management, the rectifier is divided into regions, obtain multiple cooling areas;Obtain the load to be accessed to rectifier and the access information corresponding to load and each cooling area respectively corresponding regional information, establish the association between access information and multiple regional information;Access information of target load and real-time regional information of each cooling area are obtained, based on the association, determine the cooling information corresponding to each cooling area respectively, according to cooling information, each cooling area is carried out heat management, can improve the uniformity of heat management to rectifier.

Description

Technical Field

[0001] This invention relates to the field of rectifier technology, specifically to a thermal management method and system for a high-power IGBT rectifier. Background Technology

[0002] Insulated-gate bipolar transistor (IGBT) rectifiers, as core power conversion devices, are widely used in industrial heating, electrochemistry, rail transportation, and other fields. With technological advancements, the single-unit capacity of high-power IGBT rectifiers is constantly increasing, and the heat generated during their operation is also increasing dramatically.

[0003] Currently, common rectifier thermal management solutions mostly employ global cooling or localized cooling strategies based on simple temperature thresholds. For example, large cooling fans are used for overall airflow cooling, or corresponding cooling units are activated after the temperature in a certain area exceeds a fixed threshold. However, these methods, employing global cooling, apply the same cooling intensity regardless of the uniformity of heat distribution within the rectifier, easily leading to uneven thermal management. Furthermore, responsive cooling based on fixed thresholds has a lag; there is a time delay between the temperature exceeding the threshold and the cooling system activating and taking effect. The generated heat is difficult to remove in a timely and effective manner, resulting in excessively high IGBT junction temperatures, which in turn causes device performance degradation, shortened lifespan, and affects the reliability and stability of rectifier operation.

[0004] Therefore, we propose a thermal management method and system for high-power IGBT rectifiers to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a thermal management method and system for high-power IGBT rectifiers to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a thermal management method and system for a high-power IGBT rectifier, the method comprising the following steps:

[0007] Obtain the rectifier to be thermally managed, divide the rectifier into regions, and obtain multiple regions to be cooled;

[0008] Obtain the load of the rectifier to be connected, the connection information corresponding to the load, and the area information corresponding to each area to be cooled, and establish the association between the connection information and multiple area information;

[0009] Obtain the access information of the target load and the real-time area information of each area to be cooled, determine the cooling information corresponding to each area to be cooled based on the correlation, and perform thermal management on each area to be cooled based on the cooling information.

[0010] Preferably, the step of obtaining the rectifier to be thermally managed and dividing the rectifier into multiple regions to be cooled includes:

[0011] The system acquires the various sub-modules inside the rectifier to be thermally managed, and treats each sub-module as a cooling area. For each cooling area, a monitoring point, a cooling mechanism, and a corresponding control terminal are configured, and multiple control terminals are managed collaboratively through the management terminal.

[0012] Preferably, the step of obtaining the load of the rectifier to be connected, the connection information corresponding to the load, and the area information corresponding to each area to be cooled, and establishing the association between the connection information and multiple area information includes:

[0013] The connection time point and load information corresponding to the load to be connected to the rectifier are obtained as connection information; the current temperature information of each area to be cooled is obtained as area information.

[0014] Based on the load information and the current temperature information of each area to be cooled, determine the required temperature value of each area to be cooled when the load is connected, and determine the required duration of each area to be cooled based on the required temperature value.

[0015] The relationship between demand duration and access time is established to create a connection between access information and information from multiple regions.

[0016] Preferably, the step of establishing the association between demand duration and access time includes:

[0017] Create a timeline for the load to be connected and a timeline for each area to be cooled; multiple moving points for time calibration are evenly set on each timeline.

[0018] A mobile station is set on the load timeline. The mobile station is configured to move at the mobile point position on the load timeline and has multiple assignable mobile points stored inside it.

[0019] Multiple mobile points stored in the mobile station are connected one-to-one with each timeline of a corresponding area to be cooled. Once a mobile point is connected to a timeline of a corresponding area to be cooled, it is assigned to that area's timeline and can move at the mobile point position on that area's timeline.

[0020] Establish a communication connection between each of the moving points and the control terminal of the cooling mechanism in the area to be cooled;

[0021] Based on the connection relationship between the mobile station, the mobile point and its corresponding timeline to the cooling area, a correlation is established between the load access time and the required duration of each cooling area.

[0022] Preferably, the step of obtaining the access information of the target load and the current area information of each area to be cooled, and determining the cooling information corresponding to each area to be cooled based on the correlation includes:

[0023] Obtain the access information of the target load and the current area information of each area to be cooled, and determine the target point of the mobile station on the corresponding time line based on the access time of the load.

[0024] Obtain the current location of the mobile station as the initial location, and determine the movement time of the mobile station based on the initial location and the target location;

[0025] When a mobile station receives a request for access from the load, it issues a mobile point to the timeline of the area to be cooled.

[0026] The target stopping point of the moving point on the corresponding time line is determined based on the required temperature value of each area to be cooled, and the moving distance of the moving point is determined based on the current point and the target stopping point.

[0027] The movement rate of each mobile point on the corresponding timeline is determined based on the movement time and distance traveled by the mobile station. Each mobile point is then moved to the target resting point on the corresponding timeline according to the movement rate. The cooling rate is determined based on the movement rate. The time when the mobile point begins to move from the initial point to the target resting point is taken as the cooling start time. The cooling rate and the cooling start time are used as cooling information.

[0028] Preferably, the step of performing thermal management on each area to be cooled based on cooling information includes:

[0029] The system acquires cooling information for the target area to be cooled. Based on the cooling start time, it activates the corresponding cooling mechanism via the control terminal to perform thermal management on the corresponding area to be cooled according to the cooling rate. The cooling rate is configured to reduce the temperature of the area to be cooled from the current temperature to a preset target temperature before the moving point moves to the target stopping point. The preset target temperature is the lowest temperature value within the safe temperature threshold range for normal operation of the rectifier.

[0030] Preferably, after starting the corresponding cooling mechanism through the control terminal to perform thermal management on the corresponding area to be cooled according to the cooling rate, the method further includes: real-time monitoring of the actual temperature impact of the load operation on the rectifier; updating the cooling rate of the cooling mechanism based on the actual temperature impact to obtain a variable-temperature cooling rate; and performing thermal management on the corresponding area to be cooled according to the variable-temperature cooling rate. The variable-temperature cooling rate is configured to maintain the temperature of the area to be cooled at the optimal operating temperature, which is higher than the preset target temperature and within the safe temperature threshold range.

[0031] A thermal management system for a high-power IGBT rectifier, applied to the thermal management method for a high-power IGBT rectifier as described in any one of the above claims, comprising:

[0032] The region division module is used to acquire the rectifier to be thermally managed, divide the rectifier into regions, and obtain multiple regions to be cooled.

[0033] The module is used to obtain the load of the rectifier to be connected, the connection information corresponding to the load, and the area information corresponding to each area to be cooled, and to establish the association between the connection information and multiple area information.

[0034] The thermal management module is used to obtain the access information of the target load and the real-time area information of each area to be cooled, determine the cooling information corresponding to each area to be cooled based on the correlation, and perform thermal management on each area to be cooled according to the cooling information.

[0035] Compared with the prior art, the beneficial effects of the present invention are:

[0036] By configuring mobile stations and their coordinated movement on a virtual timeline, the required cooling start time and initial cooling rate for each cooling zone are determined based on load information and current temperature before the load is connected. This allows the cooling mechanism to intervene in advance before thermal shock occurs, buffering the temperature, reducing the risk of IGBT damage due to instantaneous overheating, improving equipment reliability, and enabling separate thermal management of the rectifier zones. This improves the uniformity of thermal management of the rectifier, thereby enhancing the coordination and operational reliability of the entire rectifier thermal management system. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments 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.

[0038] Figure 1 This is a schematic diagram of the method flow of the present invention;

[0039] Figure 2 This is a schematic diagram of the distribution structure of the moving points in this invention;

[0040] Figure 3 This is a system structure block diagram of the present invention. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] For examples, please refer to Figures 1 to 3 This invention provides a thermal management method and system technical solution for a high-power IGBT rectifier: A thermal management method for a high-power IGBT rectifier includes the following steps:

[0043] S1: Obtain the rectifier to be thermally managed, divide the rectifier into regions, and obtain multiple regions to be cooled;

[0044] The steps of obtaining the rectifier to be thermally managed and dividing the rectifier into multiple cooling zones include: obtaining each sub-module inside the rectifier to be thermally managed, and treating each sub-module as a cooling zone; configuring monitoring points, cooling mechanisms, and corresponding control terminals for each cooling zone, with multiple control terminals working together through a management terminal.

[0045] Specifically, for modularly designed rectifiers, each submodule is a natural cooling zone. For example, a power module containing IGBTs, anti-parallel diodes, and drive circuitry can be considered a zone. At least one monitoring point can be placed at the thermal center or hottest point of each zone, and temperature monitoring can be performed using sensors. Each zone to be cooled is equipped with a cooling mechanism, and each cooling mechanism is equipped with a corresponding control terminal to control the cooling mechanism to cool the zone, thus achieving thermal management. Multiple control terminals are managed through a management terminal to coordinate the control of multiple cooling mechanisms and perform coordinated thermal management on multiple zones to be cooled.

[0046] S2: Obtain the load of the rectifier to be connected, the connection information corresponding to the load, and the area information corresponding to each area to be cooled, and establish the association between the connection information and multiple area information;

[0047] The steps for obtaining the load of the rectifier to be connected, the corresponding connection information of the load, and the area information corresponding to each area to be cooled, and establishing the association between the connection information and multiple area information include: obtaining the connection time point and load information corresponding to the load of the rectifier to be connected as connection information; obtaining the current temperature information of each area to be cooled as area information; determining the required temperature value of each area to be cooled when the load is connected based on the load information and the current temperature information of each area to be cooled; determining the required duration of each area to be cooled based on the required temperature value; and building an association between the required duration and the connection time point as the association between the connection information and multiple area information.

[0048] The steps for establishing a correlation between demand duration and access time include: creating a timeline for the load to be accessed and a timeline for each area to be cooled; the area timelines are arranged in a uniform ring around the load timelines; and multiple moving points for calibrating time are evenly set on each timeline.

[0049] A moving station is set on the load timeline. The moving station is configured to move at the moving point on the load timeline, and it internally stores multiple assignable moving points.

[0050] Multiple mobile points stored in the mobile point station are connected one-to-one with each timeline of the corresponding area to be cooled. Once a mobile point is connected to a timeline of a corresponding area to be cooled, it is dispatched to that area's timeline and can move on the mobile point position of that area's timeline.

[0051] Establish a communication connection between each moving point and the control terminal of the cooling mechanism in the area to be cooled;

[0052] Based on the connection relationship between mobile stations, mobile points and their corresponding cooling areas on the timeline, a correlation is established between the load access time and the required duration of each cooling area.

[0053] It should be noted that the target point of the mobile station on the load timeline is determined by the access time of the load; the time required for the mobile station to move from its initial point to the target point is defined as the base movement time. The distance required for a mobile point issued to the regional timeline to move from its current point to a target resting point is determined by the required time of the corresponding cooling area; the movement speed of the logical mobile point on the regional timeline is determined by the movement distance and the base movement time of the mobile station. The connection relationship between the mobile station and its stored multiple logical mobile points, as well as the connection relationship between the logical mobile point and the regional timeline, together constitute a star topology; wherein, the mobile station is located at the central node of the star topology, and the regional timeline is uniformly arranged around the outside of the load timeline in the specific form of either a radial ring array or a polygonal ring array.

[0054] The timeline is a time axis object, a logical time coordinate system, which can be an array, a queue, or a dedicated time management class, used to mark and manage "when" and "what" happens. The movement points set on the timeline are specific timestamps on that timeline. Movement stations belong to a central management module, used to manage the issuance and retrieval of multiple movement points. When a movement point moves to its target stopping point, multiple movement points are retrieved to their corresponding movement stations through the communication connection between the movement point and the movement station. At this point, the movement station completes the thermal management operation corresponding to the target load and is used to serve the thermal management of the rectifier when the next target load is connected to the rectifier. The communication connection between the movement point and the control terminal of the corresponding timeline is used to receive movement rate instructions from the central management module. The end effector of each cooling zone determines the cooling rate based on the movement rate, thereby transmitting the cooling rate to the corresponding control terminal. The control terminal performs thermal management on the area to be cooled according to the cooling rate. The access time is converted into a target timestamp on the timeline, and the required duration is converted into a time length. The movement of the mobile station is a logical countdown. The monitoring point detects how long after a load will be connected and simultaneously obtains the current temperature in the area. The mobile station receives the access time and load information, calculates the required duration and target temperature for each area based on the load power and the current temperature, and then the mobile station starts moving, which means starting the logical countdown. It also calculates the required cooling rate for each area and transmits the cooling rate to the inverters in each cooling area in real time. At this point, the mobile station starts moving, and the inverter drives the cooling mechanism to begin gradual cooling in advance.

[0055] Specifically, the system acquires the load to be connected to the rectifier and its corresponding connection information. This connection information includes the connection time and load details, such as the load's power, the change in current after the load is connected to the rectifier, and the resulting temperature change in the rectifier. The temperature change caused by the current change is used as temperature impact information. Since the current temperature information for each cooling zone may differ, the required temperature values ​​for each cooling zone after the load is connected to the rectifier will also vary. The required temperature value refers to the temperature that the zone needs to be cooled to after the load is connected, given the current temperature information, to meet the rectifier's temperature management requirements and not exceed a certain temperature threshold to ensure the rectifier's normal operation and extend its lifespan. Based on temperature impact information, determine the travel distance of the mobile point corresponding to each cooling area. Based on the cooling intensity of each cooling area, determine the required duration information for that cooling area. Map the required duration information onto the timeline of the corresponding cooling area. Map the duration between the load connection time and the current time onto the timeline corresponding to the load. On the timeline corresponding to the load, set the mobile point station as the management end of multiple control terminals. The management end is used to manage multiple control terminals. The control end is used to control the switching information of the cooling mechanism in each cooling area. The switching information includes the switching status and the corresponding cooling information. Control the cooling mechanism according to the cooling information. When the rectifier receives a load access command from the management terminal, it determines the target time point for pre-cooling each cooling area based on the access time of the load to the rectifier, and marks the target time point on the timeline of the corresponding cooling area. The management terminal issues moving points to multiple timelines, and the moving points move along the timelines to the target time point. When the moving point starts moving towards the target dwell point, it triggers the control terminal to control the cooling mechanism of the corresponding cooling area to cool that area. When the moving point station corresponding to the management terminal moves to the access time point, it calculates the movement rate of each moving point to the target time point based on the time it takes for the moving point station to move to the corresponding position, and moves the moving point on the corresponding timeline according to the movement rate. This ensures that the cooling mechanism of each cooling area can be activated in advance to cool the area before the moving point station reaches the target position, reducing the time deviation between the rectifier's heating and cooling, thereby reducing the impact of sudden temperature increases caused by load access on the rectifier and improving the thermal management effect of the rectifier.

[0056] S3: Obtain the access information of the target load and the real-time area information of each area to be cooled, determine the cooling information corresponding to each area to be cooled based on the correlation, and perform thermal management on each area to be cooled according to the cooling information.

[0057] The steps for obtaining the access information of the target load and the current area information of each area to be cooled, and determining the cooling information corresponding to each area to be cooled based on the correlation, include: obtaining the access information of the target load and the current area information of each area to be cooled; determining the target position of the mobile station on the corresponding timeline based on the access time of the load; obtaining the current position of the mobile station as the initial position; determining the movement duration of the mobile station based on the initial position and the target position; issuing a mobile point to the timeline of the area to be cooled when the mobile station receives the demand access command issued by the load; determining the target dwell position of the mobile point on the corresponding timeline based on the demand temperature value of each area to be cooled; determining the movement distance of the mobile point based on the current position and the target dwell position; determining the movement speed of the mobile point on the corresponding timeline based on the movement duration and the movement distance of the mobile point; moving each mobile point to the target dwell position on the corresponding timeline according to the movement speed; determining the cooling rate based on the movement speed; taking the time when the mobile point starts moving from the initial position to the target dwell position as the cooling start time; and taking the cooling rate and the cooling start time as the cooling information.

[0058] The steps for thermal management of each area to be cooled based on cooling information include: obtaining cooling information of the target area to be cooled; and, based on the cooling start time, starting the corresponding cooling mechanism through the control terminal to perform thermal management of the corresponding area to be cooled according to the cooling rate. The cooling rate is configured to reduce the temperature of the area to be cooled from the current temperature to a preset target temperature before the moving point moves to the target stopping point. The preset target temperature is the lowest temperature value within the safe temperature threshold range for normal operation of the rectifier.

[0059] After starting the corresponding cooling mechanism through the control terminal to perform thermal management on the corresponding area to be cooled according to the cooling rate, the process also includes: real-time monitoring of the actual temperature impact of load operation on the rectifier; updating the cooling rate of the cooling mechanism based on the actual temperature impact to obtain a variable temperature cooling rate; and performing thermal management on the corresponding area to be cooled according to the variable temperature cooling rate. The variable temperature cooling rate is configured to maintain the temperature of the area to be cooled at the optimal operating temperature, which is higher than the preset target temperature and within the safe temperature threshold range.

[0060] Specifically, the cooling rate corresponds to the movement of the moving point. Cooling begins as soon as the moving point starts moving. The cooling rate of the cooling area is determined based on the movement time of the moving point, ensuring that the temperature of the corresponding cooling area is adjusted to the target temperature before the moving point reaches the target stopping position. The target temperature is the lowest temperature within the safety threshold corresponding to the rectifier's temperature, which serves as a temperature buffer after the load is connected to the rectifier, preventing a sudden increase in the rectifier temperature after the load is connected. After the load is connected, the cooling information of the cooling mechanism is readjusted based on the actual temperature impact of the load on the rectifier, ensuring that the rectifier temperature is at the optimal temperature within the safety threshold after the load is connected.

[0061] Specifically, the system acquires the access time of the target load, such as the time when a computing task is scheduled to start running on a server. It also acquires the current area information for each area to be cooled, including the current actual temperature of each area and the preset required temperature value for that area. The controller maintains a timeline representing the movement path of physical cooling resources (such as coolant distribution units, fan arrays, etc.). Based on the load's access time T, the controller determines a corresponding target point on this timeline. This point represents the optimal location for the mobile station at time T to best respond to the heat demand generated by the load. The controller acquires the current position of the mobile station as the initial point and calculates the required movement time from the mobile station to the target area. This time can be calculated based on the station's fixed movement speed and the distance between the two points. When the mobile station receives a demand access command from the target load (this command is associated with the load access event), the mobile station begins to issue movement points to the corresponding area timeline of each area to be cooled, and simultaneously activates the cooling mechanism in the corresponding area to begin cooling. Each area to be cooled has its own independent timeline for planning the precise timing of its cooling operations; for each area to be cooled and its movement point: based on the required temperature value of the area, a target dwell point is determined on its area timeline.This target dwell point represents the point where, after the cooling operation begins and the moving point reaches the target dwell point, the cooling rate of the cooling mechanism is readjusted to ensure that the rectifier temperature is closer to the optimal temperature value within the safety threshold, thus guaranteeing the rectifier's operating temperature and reducing the impact of temperature on the rectifier's lifespan. The current position of the moving point on its timeline is obtained (this could be the start of the timeline or a point corresponding to the current time point). The distance required for the moving point to move from the current position to the target dwell point is calculated (in this example, the distance on the timeline, i.e., the time difference). Based on the previously calculated moving point station's movement time and the moving point's movement distance, the moving rate of the moving point on the timeline is determined. This rate ensures that when the moving point station physically arrives at the optimal response position target point after a long movement time, it is also the exact time when each moving point arrives at its target dwell point on its respective timeline at its moving rate. This achieves spatiotemporal synchronization between physical resource placement and cooling logic triggering. The controller distributes each moving point to its corresponding timeline according to the calculated moving rate. The system initiates its movement towards the target location, simultaneously activating (or triggering) the control terminal corresponding to that point. This control terminal then controls the cooling mechanisms (such as micro-pumps, valves, fans, etc.) in the corresponding cooling area to initiate cooling operations, enabling precise thermal management. The cooling operation is triggered based on temperature and correlated with the load's lifecycle (connection time) and the real-time location of physical cooling resources, achieving precise control of "resources arriving when demand arrives." By calculating the movement time of each mobile station, the movement rate of all mobile points is coordinated, ensuring that the cooling actions of multiple areas are synchronized with the preparation status of the central cooling resources, avoiding resource conflicts or waiting delays. The rectifier is subjected to zoned cooling control, pre-cooling each cooling area before the load is connected. The adjustment time is determined based on the actual temperature values ​​of different areas, allowing each cooling area to better adapt to the time the load connects to the rectifier. Cooling is adjusted according to the specific conditions of each area to meet the temperature requirements when the load connects to the rectifier, improving the overall temperature uniformity of the rectifier and thus extending its service life.

[0062] A thermal management system for a high-power IGBT rectifier, applied to the thermal management method for a high-power IGBT rectifier as described in any one of the above claims, comprising:

[0063] The region division module is used to acquire the rectifier to be thermally managed, divide the rectifier into regions, and obtain multiple regions to be cooled.

[0064] The module is used to obtain the load of the rectifier to be connected, the connection information corresponding to the load, and the area information corresponding to each area to be cooled, and to establish the association between the connection information and multiple area information.

[0065] The thermal management module is used to obtain the access information of the target load and the real-time area information of each area to be cooled, determine the cooling information corresponding to each area to be cooled based on the correlation, and perform thermal management on each area to be cooled according to the cooling information.

[0066] By configuring mobile stations and their coordinated movement on a virtual timeline, the required cooling activation time and initial cooling rate for each cooling zone are determined based on load information and current temperature before load access. This allows the cooling mechanism to intervene before thermal shock occurs, buffering temperatures and reducing the risk of IGBT damage due to instantaneous overheating, thus improving equipment reliability. Furthermore, it enables separate thermal management of the rectifier zones, improving the uniformity of thermal management and enhancing the coordination and operational reliability of the entire rectifier thermal management system. The cooling process is divided into a pre-cooling buffer stage and a dynamic maintenance stage. The first stage aims for the lowest safe temperature, reserving buffer space for load shocks; the second stage aims to maintain a higher and more economical optimal operating temperature. This improves safety under shock conditions and reduces energy consumption of the cooling system during steady-state operation.

[0067] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," 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 the invention. In this specification, 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.

[0068] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thermal management method for a high-power IGBT rectifier, characterized in that, Includes the following steps: Obtain the rectifier to be thermally managed, divide the rectifier into regions, and obtain multiple regions to be cooled; Obtain the load of the rectifier to be connected, the connection information corresponding to the load, and the area information corresponding to each area to be cooled, and establish the association between the connection information and multiple area information; The connection time point and load information corresponding to the load to be connected to the rectifier are obtained as connection information; the current temperature information of each area to be cooled is obtained as area information. Based on the load information and the current temperature information of each area to be cooled, determine the required temperature value of each area to be cooled when the load is connected, and determine the required duration of each area to be cooled based on the required temperature value. The relationship between demand duration and access time is established to create a connection between access information and information from multiple regions. The steps for establishing a relationship based on demand duration and access time include: Create a timeline for the load to be connected and a timeline for each area to be cooled; the area timelines are arranged in a uniform ring around the load timelines; multiple moving points for time calibration are evenly set on each timeline. A mobile station is set on the load timeline. The mobile station is configured to move at the mobile point position on the load timeline and stores multiple assignable mobile points internally. The mobile station is located at the central node of the star topology. Multiple mobile points stored in the mobile station are connected one-to-one with each timeline of a corresponding area to be cooled. Once a mobile point is connected to a timeline of a corresponding area to be cooled, it is assigned to that area's timeline and can move at the mobile point position on that area's timeline. Establish a communication connection between each of the moving points and the control terminal of the cooling mechanism in the area to be cooled; Based on the connection relationship between the mobile stations, the mobile points and their corresponding timelines to be cooled, a correlation is established between the load access time and the required duration of each cooling area. Obtain the access information of the target load and the real-time area information of each area to be cooled, determine the cooling information corresponding to each area to be cooled based on the correlation, and perform thermal management on each area to be cooled according to the cooling information. The step of obtaining the access information of the target load and the current area information of each area to be cooled, and determining the cooling information corresponding to each area to be cooled based on the correlation, includes: Obtain the access information of the target load and the current area information of each area to be cooled, and determine the target point of the mobile station on the corresponding time line based on the access time of the load. Obtain the current location of the mobile station as the initial location, and determine the movement time of the mobile station based on the initial location and the target location; When a mobile station receives a request for access from the load, it issues a mobile point to the timeline of the area to be cooled. The target stopping point of the moving point on the corresponding time line is determined based on the required temperature value of each area to be cooled, and the moving distance of the moving point is determined based on the current point and the target stopping point. The movement rate of a mobile point on the corresponding timeline is determined based on the movement time and distance traveled by the mobile station. Each mobile point is then moved to the target resting point on the corresponding timeline according to the movement rate. The cooling rate is determined based on the movement rate. The time when a mobile point begins to move from its initial point to the target resting point is taken as the cooling start time. The cooling rate and the cooling start time are used as cooling information. Once the mobile point moves to the target stopping point, multiple mobile points are returned to their corresponding mobile point stations through the communication connection between the mobile point and the mobile point station. The mobile point station completes the thermal management operation corresponding to the target load and is used to serve the thermal management of the rectifier when the next target load is connected to the rectifier.

2. The thermal management method for a high-power IGBT rectifier according to claim 1, characterized in that: The steps of obtaining the rectifier to be thermally managed and dividing the rectifier into multiple regions to be cooled include: The system acquires the various sub-modules inside the rectifier to be thermally managed, and treats each sub-module as a cooling area. For each cooling area, a monitoring point, a cooling mechanism, and a corresponding control terminal are configured, and multiple control terminals are managed collaboratively through the management terminal.

3. The thermal management method for a high-power IGBT rectifier according to claim 1, characterized in that: The steps for thermal management of each area to be cooled based on cooling information include: The system acquires cooling information for the target area to be cooled. Based on the cooling start time, it activates the corresponding cooling mechanism via the control terminal to perform thermal management on the corresponding area to be cooled according to the cooling rate. The cooling rate is configured to reduce the temperature of the area to be cooled from the current temperature to a preset target temperature before the moving point moves to the target stopping point. The preset target temperature is the lowest temperature value within the safe temperature threshold range for normal operation of the rectifier.

4. The thermal management method for a high-power IGBT rectifier according to claim 3, characterized in that: After starting the corresponding cooling mechanism through the control terminal to perform thermal management on the corresponding area to be cooled according to the cooling rate, the process also includes: real-time monitoring of the actual temperature impact of load operation on the rectifier; updating the cooling rate of the cooling mechanism based on the actual temperature impact to obtain a variable temperature cooling rate; and performing thermal management on the corresponding area to be cooled according to the variable temperature cooling rate. The variable temperature cooling rate is configured to maintain the temperature of the area to be cooled at the optimal operating temperature, which is higher than the preset target temperature and within the safe temperature threshold range.

5. A thermal management system for a high-power IGBT rectifier, applied to the thermal management method for the high-power IGBT rectifier as described in any one of claims 1-4, characterized in that, include: The region division module is used to acquire the rectifier to be thermally managed, divide the rectifier into regions, and obtain multiple regions to be cooled. The module is used to obtain the load of the rectifier to be connected, the connection information corresponding to the load, and the area information corresponding to each area to be cooled, and to establish the association between the connection information and multiple area information. The thermal management module is used to obtain the access information of the target load and the real-time area information of each area to be cooled, determine the cooling information corresponding to each area to be cooled based on the correlation, and perform thermal management on each area to be cooled according to the cooling information.

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