Test method for extreme working conditions of energy self-balancing power module and related device

Abstract

The application discloses a test method and related device for extreme working conditions of an energy self-balancing power module, which divides the test into two scenes of a pre-unlocking starting charging stage (small current) and a post-unlocking steady operation stage (large current), and respectively carries out the test for the extreme working conditions of the energy self-balancing power module in the two scenes to obtain two kinds of extreme working condition test data. Thus, the problem that the reliability of the energy self-balancing power module after being put into operation in an actual project cannot be judged due to the fact that no test has been carried out on the energy self-balancing power module in extreme working conditions, i.e., the fault of the module bypass switch refusing to act while the energy self-balancing power module energy release branch welding type IGBT device is mistakenly turned on.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flexible direct current converter valve, in particular to a test method for extreme working condition of energy self-balancing power module and related device. BACKGROUND

[0002] The only difference between the energy self-balancing power module in the flexible direct current converter valve and the conventional topology power module in structure is that a discharge branch is connected in parallel between the positive and negative poles of the module capacitor, the discharge branch is composed of a welded IGBT device, a discharge resistor and a connected copper bar in series, when the module voltage abnormally rises and exceeds the action voltage of the discharge branch due to a fault during the operation of the power module, the power module control board will trigger the IGBT T3 (half-bridge) or IGBT T5 (full-bridge) of the discharge branch to be opened to put the discharge resistor R2 (a few ohms) into operation, so as to quickly discharge the module capacitor and reduce the module voltage to the safe operation range, thereby ensuring that the power module does not be damaged by overvoltage.

[0003] Although the energy self-balancing power module can realize orderly regulation and control of the module voltage through the discharge branch to avoid overvoltage damage to the module, there is an extreme working condition, i.e. the mis-opening of the welded IGBT device of the energy self-balancing power module discharge branch and the superimposed failure of the module bypass switch; the real performance of the energy self-balancing module under the above extreme working condition is directly related to whether the energy self-balancing power module can be reliably operated after being put into operation in actual engineering, but the above test has not been carried out in the industry, and there is no mature test scheme for reference, therefore, it is urgent to design a test method for extreme working condition of energy self-balancing power module. SUMMARY

[0004] The present application provides a test method for extreme working condition of energy self-balancing power module, which is used to solve the problem that the reliability of the energy self-balancing power module after being put into operation in actual engineering cannot be judged because the energy self-balancing power module has not been tested under the extreme working condition, i.e. the mis-opening of the welded IGBT device of the energy self-balancing power module discharge branch and the superimposed failure of the module bypass switch.

[0005] Therefore, the first aspect of the present application provides a test method for extreme working condition of energy self-balancing power module, which comprises:

[0006] The stage of the extreme working condition is determined according to the current value of the tested energy self-balancing power module, and the stage comprises: a pre-unlocking start charging stage and a post-unlocking steady state running stage of the tested energy self-balancing power module;

[0007] The test tools and test environment used for the pre-unlocking start charging stage and the post-unlocking steady state running stage are configured respectively;

[0008] In the pre-unlocking start charging phase, a first test loop is constructed, the first test loop is placed in the corresponding test environment, the test energy self-balancing power module outputs the same current as the actual charging current of the start charging phase of the flexible direct current project, the first total test duration is determined, the test energy self-balancing power module is controlled to be always in the locked state, and the first operation parameters and the first working states of each component in the energy release branch of the test energy self-balancing power module are monitored in real time;

[0009] Based on the first total test duration, the test states of the test energy self-balancing power module in the extreme working condition are analyzed according to the first operation parameters and the first working states, the operation parameters at the corresponding moment are recorded, and the extreme working condition test data of the test energy self-balancing power module in the pre-unlocking start charging phase are obtained;

[0010] In the post-unlocking steady running phase, a second test loop is constructed, the second test loop is placed in the corresponding test environment, the running current of the second test loop is controlled to be the same as the actual charging current of the unlocking running phase of the flexible direct current project, the second total test duration is determined, the test energy self-balancing power module is controlled to be always in the locked state, and the second operation parameters and the second working states of each component in the energy release branch of the test energy self-balancing power module are monitored in real time;

[0011] Based on the second total test duration, the test states of the test energy self-balancing power module in the extreme working condition are analyzed according to the operation parameters and the second working states, the operation parameters at the corresponding moment are recorded, and the extreme working condition test data of the test energy self-balancing power module in the post-unlocking steady running phase are obtained.

[0012] Optionally, the test tools and the environment for testing the pre-unlocking start charging phase and the post-unlocking steady running phase are configured, including:

[0013] For the pre-unlocking start charging phase, an IGBT chip that has been short-circuited and failed is used to replace a normal IGBT chip in the IGBT device of the energy release branch of the test energy self-balancing power module, and is packaged into a complete welded IGBT device, and a water cooling system for cooling the test energy self-balancing power module is configured;

[0014] During the post-unlocking steady-state operation phase, the energy-draining branch welded IGBT of the energy-draining branch welded IGBT under test is a normal device, but the driving board of the energy-draining branch welded IGBT is continuously powered by an independent power supply, and is equipped with a communication channel for communicating with the test operation platform, and is configured with a water cooling system for cooling the energy-draining branch welded IGBT under test.

[0015] Optionally, constructing the first test loop includes:

[0016] The energy self-balancing power module under test is connected in parallel with a controlled current source Is, and the input power supply of the bypass switch driving board of the energy self-balancing module under test is disconnected.

[0017] Optionally, the real-time monitoring of the first operating parameters and the first working state of each component in the energy discharge branch of the tested energy self-balancing power module includes:

[0018] Real-time monitoring of the resistance R2 of the energy dissipation branch of the energy self-balancing power module under test, the module DC capacitor C1, and the voltage U at both ends of the module AC port R2 、U C1 、U SCR The surface temperature T of the energy dissipation branch resistor R2 of the energy self-balancing power module under test is monitored simultaneously. R2 , and observe whether the energy dissipation branch resistor R2 explodes.

[0019] Optionally, based on the total duration of the first test, according to the first operating parameters and the first working state, analyzing the test state of the tested energy self-balancing power module under extreme working conditions, and recording the operating parameters at corresponding moments, obtaining the extreme working condition test data of the tested energy self-balancing power module in the charging stage before unlocking, including:

[0020] During the first test duration, according to whether the energy dissipation branch resistor R2 explodes, and in combination with the energy dissipation branch resistor R2, the module DC capacitor C1, and the voltage U across the module AC port R2 、U C1 、U SCR The value of the energy dissipation branch resistor R2, the surface temperature T R2 , the test state of the tested energy self-balancing power module under extreme working conditions is analyzed, and the operating parameters at the corresponding time are recorded to obtain the extreme working condition test data of the tested energy self-balancing power module in the charging stage before unlocking.

[0021] Optionally, constructing the second test loop includes:

[0022] installing the test energy self-balancing power module at an intermediate position in a test valve section of a valve section operation test platform, wherein the test valve section is composed of a plurality of modules in series, and disconnecting the input power supply of the bypass switch driving board of the test energy self-balancing module.

[0023] Optionally, the real-time monitoring of the second operation parameters and the second working states of each component in the energy dissipation branch of the test energy self-balancing power module comprises:

[0024] The real-time monitoring of the resistance R2 of the energy dissipation branch of the test energy self-balancing power module, the module DC capacitor C1, the voltage U R2 , U C1 , U SCR across the module AC port, the surface temperature T R2 of the resistance R2 of the energy dissipation branch, and the observation of whether the resistance R2 of the energy dissipation branch is ruptured.

[0025] Optionally, based on the second total test duration, the test state of the test energy self-balancing power module under the extreme working condition is analyzed according to the operation parameters and the second working states, and the operation parameters at the corresponding time are recorded to obtain the extreme working condition test data of the test energy self-balancing power module in the steady-state operation stage after the unlocking, comprising:

[0026] During the second total test duration, the test state of the test energy self-balancing power module under the extreme working condition is analyzed according to whether the resistance R2 of the energy dissipation branch is ruptured, in combination with the resistance R2 of the energy dissipation branch, the module DC capacitor C1, the voltage U R2 , U C1 , U SCR across the module AC port, the surface temperature T R2 of the resistance R2 of the energy dissipation branch, and the operation parameters at the corresponding time are recorded to obtain the extreme working condition test data of the test energy self-balancing power module in the steady-state operation stage after the unlocking.

[0027] Optionally, the test energy self-balancing power module is an energy self-balancing half-bridge power module or an energy self-balancing full-bridge power module.

[0028] The second aspect of the present application provides an extreme working condition test system of an energy self-balancing power module, the system comprising:

[0029] A judgment unit is configured to determine a stage in which the extreme working condition occurs according to the current value of the test energy self-balancing power module, the stage comprising: a pre-unlocking start charging stage and a post-unlocking steady-state operation stage of the test energy self-balancing power module.

[0030] a configuration unit configured to configure a test tool and a test environment for testing the pre-unlocking start-up charging phase and the post-unlocking steady operation phase, respectively;

[0031] a first control unit configured to, in the pre-unlocking start-up charging phase, construct a first test loop, place the first test loop in the corresponding test environment, and control the test energy self-balancing power module to output a current identical to an actual charging current in the start-up charging phase of the flexible direct current project, determine a first total test duration, control the test energy self-balancing power module to be always in a locked state, and monitor first operation parameters and first working states of each component in an energy dissipation branch of the test energy self-balancing power module in real time;

[0032] a first analysis unit configured to, based on the first total test duration, analyze test states of the test energy self-balancing power module in extreme working conditions according to the first operation parameters and the first working states, record operation parameters at corresponding time points, and obtain extreme working condition test data of the test energy self-balancing power module in the pre-unlocking start-up charging phase;

[0033] a second control unit configured to, in the post-unlocking steady operation phase, construct a second test loop, place the second test loop in the corresponding test environment, control an operation current of the second test loop to be identical to an actual charging current in the unlocking operation phase of the flexible direct current project, determine a second total test duration, control the test energy self-balancing power module to be always in the locked state, and monitor second operation parameters and second working states of each component in the energy dissipation branch of the test energy self-balancing power module in real time;

[0034] a second analysis unit configured to, based on the second total test duration, analyze test states of the test energy self-balancing power module in extreme working conditions according to the operation parameters and the second working states, record operation parameters at corresponding time points, and obtain extreme working condition test data of the test energy self-balancing power module in the post-unlocking steady operation phase.

[0035] A third aspect of the present application provides an energy self-balancing power module extreme working condition test device, the device comprising a processor and a memory:

[0036] The memory is configured to store program code and transmit the program code to the processor.

[0037] The processor is configured to execute steps of the energy self-balancing power module extreme working condition test method according to instructions in the program code.

[0038] The fourth aspect of the present application provides a computer readable storage medium for storing program codes for executing the test method of the energy self-balancing power module in extreme working conditions according to the first aspect.

[0039] From the above technical solutions, the present application has the following advantages:

[0040] The present application provides a test method of the energy self-balancing power module in extreme working conditions, which divides the test into two scenes of "start charging phase before unlocking (small current)" and "steady running phase after unlocking (large current)", and carries out the test of the energy self-balancing power module in extreme working conditions in the two scenes, respectively, to obtain two kinds of extreme working condition test data. Thus, the problem that the reliability of the energy self-balancing power module after being put into operation in actual engineering cannot be judged because the energy self-balancing power module has not been tested in extreme working conditions, i.e., "welding type IGBT device of energy self-balancing power module discharge branch mis-opening while superimposed module bypass switch failure" is solved. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0042] Figure 1 A flowchart of a test method of the energy self-balancing power module in extreme working conditions provided by the embodiment of the present application is shown in the figure.

[0043] Figure 2 A schematic diagram of the topology structure of the energy self-balancing half-bridge power module provided by the embodiment of the present application is shown in the figure.

[0044] Figure 3 A schematic diagram of the topology structure of the energy self-balancing full-bridge power module provided by the embodiment of the present application is shown in the figure.

[0045] Figure 4 A schematic diagram of the structure of a test system of the energy self-balancing power module in extreme working conditions provided by the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0046] In order to make the application purposes, features and advantages of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0047] The test principle analysis and description of the present application are as follows:

[0048] The flexible DC converter valve energy self-balancing power module includes an energy self-balancing half-bridge power module and an energy self-balancing full-bridge power module, and the topological structure diagrams are shown in Figure 2 、 Figure 3 The main internal components of the energy self-balancing half-bridge and full-bridge power module include a crimping IGBT, a fast recovery diode, a DC capacitor, a voltage balancing resistor, a bypass switch, a welding IGBT device of a discharge branch, a discharge resistor, a power supply, a redundant power supply, a module control board, a welding IGBT drive board and a bypass switch drive board, etc.

[0049] As shown in Figure 2 、 3 The only difference between the energy self-balancing half-bridge power module and the energy self-balancing full-bridge power module and the conventional topological power module in structure is that one discharge branch is connected in parallel across the positive and negative poles of the module capacitor. The discharge branch is composed of a welding IGBT device, a discharge resistor and a connecting copper bar in series. When the module voltage abnormally rises and exceeds the action voltage setting value of the discharge branch due to a fault during the operation of the power module, the IGBT T3 (half-bridge) or IGBT T5 (full-bridge) of the power module control board will be triggered to open and discharge the discharge resistor R2 (a few ohms) to quickly discharge the module capacitor and reduce the module voltage to the safe operation range, thereby ensuring that the power module will not be damaged by overvoltage.

[0050] Although the energy self-balancing half-bridge and full-bridge power modules can realize orderly regulation of the module voltage through the energy release branch to avoid overvoltage damage to the module, there is an extreme condition that the energy self-balancing power module energy release branch welded IGBT device misopens and the module bypass switch fails to act at the same time. In this condition, the module is locked and the energy release branch has lost control. The surplus energy in the system will continue to be absorbed by the energy release branch resistance of the energy self-balancing module, but the energy release resistance has a limit of energy tolerance value. Once the value is exceeded, the energy release resistance has the risk of explosion. At the same time, the internal bonding wire of the energy release branch welded IGBT also has an upper limit of energy tolerance. Once the limit is exceeded, the bonding wire will be fused, thereby disconnecting the energy release branch and stopping the absorption of energy. Therefore, in the above extreme condition, if the internal bonding wire of the welded IGBT reaches the upper limit of energy tolerance before the energy release resistance, the energy release resistance will not have the risk of explosion due to the exceeding of the energy tolerance. It needs to be observed whether the subsequent module voltage can continue to rise to cause the breakdown of the module bypass thyristor, and whether the module can be reliably bypassed. However, if the internal bonding wire of the welded IGBT reaches the upper limit of energy tolerance later than the energy release resistance, the energy release resistance has the risk of explosion due to the exceeding of the energy tolerance. In this case, if the module energy release resistance really explodes, it needs to be observed whether the explosion-proof design of the module can meet the requirements and whether the subsequent module voltage can continue to rise to cause the breakdown of the module bypass thyristor, and whether the module can be reliably bypassed. The actual performance of the energy self-balancing module in the above extreme condition is directly related to whether the energy self-balancing power module can be reliably operated after being put into operation in actual engineering.

[0051] Further, the inventors have observed through experiments that:

[0052] The extreme condition of the energy self-balancing power module energy release branch welded IGBT device misopening and the module bypass switch failing to act at the same time may occur before the power module is unlocked (at this time, the current flowing through the power module is small, about tens of amperes), or it may occur in the steady-state running stage after the unlocking (at this time, the current flowing through the power module is large, about several thousand amperes).

[0053] Therefore, the experiment should be carried out in two scenarios: the start-up charging stage (small current) and the unlocking running stage (large current). The test methods of the energy self-balancing half-bridge power module and the energy self-balancing full-bridge power module are the same in each scenario, only the test objects are different. The specific test process is as follows:

[0054] Embodiment 1:

[0055] Please refer to Figures 1-3 The test method for the extreme condition of the energy self-balancing power module provided in the embodiment of the present application comprises:

[0056] Step 101, determine the stage of extreme working condition according to the current value of the subject energy self-balancing power module, the stage includes: pre-unlocking start charging stage and post-unlocking steady state running stage of the subject energy self-balancing power module.

[0057] Step 102, configure the test tool and test environment used for pre-unlocking start charging stage and post-unlocking steady state running stage respectively.

[0058] In some embodiments, step 102 includes:

[0059] For pre-unlocking start charging stage, replace one normal IGBT chip in the energy dissipation branch IGBT device of the subject energy self-balancing power module with a short-circuit failed IGBT chip, and encapsulate it into a complete welded IGBT device, and configure a water cooling system for cooling the subject energy self-balancing power module.

[0060] For post-unlocking steady state running stage, the energy dissipation branch welded IGBT of the subject energy self-balancing power module is a normal device, but the drive board of the energy dissipation branch welded IGBT is powered by an independent power supply, and is provided with a communication channel for communication with the test operation platform, and a water cooling system for cooling the subject energy self-balancing power module is configured.

[0061] Step 103, in the pre-unlocking start charging stage, build a first test loop, place the first test loop in the corresponding test environment, output the same current as the actual charging current in the start charging stage of the flexible direct current engineering from the subject energy self-balancing power module, determine the first test total time, control the subject energy self-balancing power module to always be in a locked state, and real-time monitor the first running parameter and the first working state of each component in the energy dissipation branch of the subject energy self-balancing power module.

[0062] In some embodiments, step 102 includes building a first test loop, including:

[0063] Parallel the subject energy self-balancing power module with a controlled current source Is, and disconnect the input power supply of the bypass switch drive board of the subject energy self-balancing module.

[0064] In some embodiments, step 102 includes real-time monitoring the first running parameter and the first working state of each component in the energy dissipation branch of the subject energy self-balancing power module, including:

[0065] Real-time monitoring the resistance R2 of the energy dissipation branch of the subject energy self-balancing power module, the module direct current capacitor C1, the voltage U R2 、U C1 、U SCRthe surface temperature T of the energy dissipation branch resistor R2 of the energy self-balancing power module of the test subject is monitored synchronously R2 and whether the energy dissipation branch resistor R2 bursts is observed.

[0066] Step 104, based on the first total test duration, analyzing the test state of the energy self-balancing power module of the test subject under extreme working conditions according to the first operating parameters and the first working state, and recording the operating parameters at the corresponding time to obtain the extreme working condition test data of the energy self-balancing power module of the test subject in the pre-unlocking start charging phase.

[0067] In some embodiments, step 104 includes:

[0068] In the first total test duration, according to whether the energy dissipation branch resistor R2 bursts or not, and combining the values of the resistance R2 of the energy dissipation branch, the module DC capacitor C1, the voltage U R2 , C1 , SCR across the module AC port, the surface temperature T R2 of the energy dissipation branch resistor R2, the test state of the energy self-balancing power module of the test subject under extreme working conditions is analyzed, and the operating parameters at the corresponding time are recorded to obtain the extreme working condition test data of the energy self-balancing power module of the test subject in the pre-unlocking start charging phase.

[0069] It should be noted that the test state of the energy self-balancing power module of the test subject under extreme working conditions is analyzed in the pre-unlocking start charging phase, which is specifically shown in steps A4-A6 of embodiment 2.

[0070] Step 105, in the post-unlocking steady state running phase, a second test loop is constructed, the second test loop is placed in the corresponding test environment, the operating current of the second test loop is controlled to be the same as the actual charging current in the unlocking running phase of the flexible direct current project, the second total test duration is determined, the energy self-balancing power module of the test subject is controlled to be always in the locked state, and the second operating parameters and the second working state of each component in the energy dissipation branch of the energy self-balancing power module of the test subject are monitored in real time.

[0071] In some embodiments, the second test loop is constructed in step 105, which includes:

[0072] The energy self-balancing power module of the test subject is installed at an intermediate position in the test valve section of the valve section running test platform, wherein the test valve section is composed of a plurality of modules in series, and the input power supply of the bypass switch driving board of the energy self-balancing module of the test subject is disconnected.

[0073] In some embodiments, the second operating parameters and the second working state of each component in the energy dissipation branch of the energy self-balancing power module of the test subject are monitored in real time in step 105, which includes:

[0074] Real-time monitoring of the resistance R2 of the energy dissipation branch of the tested energy self-balancing power module, the module DC capacitor C1, and the voltage U at both ends of the module AC port R2 、U C1 、U SCR The surface temperature T of the energy dissipation branch resistor R2 of the energy self-balancing power module under test is monitored simultaneously. R2 , and observe whether the energy dissipation branch resistor R2 bursts.

[0075] Step 106: Based on the total duration of the second test, according to the operating parameters and the second working state, the test state of the tested energy self-balancing power module under extreme working conditions is analyzed, and the operating parameters at the corresponding time are recorded to obtain the extreme working condition test data of the tested energy self-balancing power module in the steady-state operation stage after unlocking.

[0076] In some embodiments, step 106 includes:

[0077] During the second test duration, based on whether the energy dissipation branch resistor R2 explodes, combined with the energy dissipation branch resistor R2, the module DC capacitor C1, and the voltage U across the module AC port R2 、U C1 、U SCR The value of the energy dissipation branch resistor R2, the surface temperature T R2 , the test state of the tested energy self-balancing power module under extreme working conditions is analyzed, and the operating parameters at the corresponding time are recorded to obtain the extreme working condition test data of the tested energy self-balancing power module in the steady-state operation stage after unlocking.

[0078] It should be noted that, in the steady-state operation stage after unlocking, the test state of the energy self-balancing power module under extreme working conditions is analyzed, as shown in steps B4 to B6 of Example 3.

[0079] Example 2:

[0080] Unlocking startup charging stage (low current) extreme working condition test method:

[0081] The test object is no less than one complete energy self-balancing half-bridge power module or one complete energy self-balancing full-bridge power module. The water cooling system needs to be turned on when testing the energy self-balancing power module under test. The energy dissipation branch welded IGBT (T3 for half-bridge and T5 for full-bridge) of the energy self-balancing power module under test adopts a special test device (the IGBT device manufacturer replaces a normal IGBT chip in the IGBT device with a short-circuited and failed IGBT chip, and then encapsulates it into a complete welded IGBT device. The device should be electrically short-circuited but the internal bonding wire connections should be intact and not damaged, so as to simulate the device being mistakenly turned on).

[0082] Step A1: The test energy self-balancing power module is connected in parallel with a controlled current source Is, and the input power of the test energy self-balancing power module bypass switch drive board is disconnected (to simulate the failure of the module bypass switch), and the entire test circuit is placed in a closed test space with explosion-proof capability;

[0083] Step A2: First, start the water cooling system, and after the cooling water inlet temperature of the test energy self-balancing power module stabilizes (temperature fluctuation is not more than 2℃), adjust the controlled current source Is connected in parallel with the test energy self-balancing power module to make the current I 充电 output by the controlled current source Is charging the test energy self-balancing power module consistent with the actual charging current I charge of the flexible direct current engineering start-up charging phase;

[0084] Step A3: The total test duration is set to Tset, and the test energy self-balancing power module is always in a locked state during the test. The test is continuously carried out, and the values of the test energy self-balancing power module discharge branch resistor R2, the module DC capacitor C1, and the voltage U R2 , U C1 , U SCR across the module AC port (i.e. the two ends of the module bypass thyristor SCR) are monitored and recorded in real time during the test. The surface temperature T R2 of the test energy self-balancing power module discharge branch resistor R2 is monitored synchronously, and whether the discharge branch resistor R2 has exploded is observed;

[0085] Step A4: If it is observed that the discharge branch resistor R2 has exploded within the set total test duration Tset, and the voltage U R2 across the module discharge branch resistor and the voltage U C1 across the module DC capacitor C1 are always equal, it indicates that the bonding wires inside the welded IGBT device of the discharge branch have not exceeded their upper limit of energy resistance before the explosion of the discharge branch resistor. At this time, the values of the voltage U R2 , U C1 , U SCR , and the temperature T R2 at the moment of the explosion of the discharge branch resistor are recorded, and then steps A4.1~A4.2 are continued;

[0086] Step A4.1: Continue to monitor the voltage U R2 , U C1 , U SCRAfter the energy dissipation resistor R2 explodes, it is generally in an open circuit state electrically. At this time, the energy dissipation branch is cut off, and the module capacitor C1 cannot continue to discharge quickly through the energy dissipation branch. At this time, the voltage of the module DC capacitor C1 will continue to rise until it breaks down the module bypass thyristor SCR. Record the voltage value U at the moment of bypass thyristor SCR breakdown SCR击穿 , monitor the voltage U across the module energy dissipation branch resistor during this process R2 The voltage U across the module DC capacitor C1 C1 The values ​​should always remain equal;

[0087] Step A4.2: Adjust the output current of the controlled current source Is to 0, and wait for the voltage U C1 After the voltage drops to 0, enter the closed test space, conduct on-site inspection and record whether there are any solid particles from the internal components of the module flying out around the tested energy self-balancing power module. Then remove the module cover to check and record the status of the energy dissipation resistor after the explosion and whether the explosion of the resistor has caused damage to other components of the module (such as cooling water pipes, etc.). Simultaneously record the status of the module bypass thyristor after the breakdown and whether the breakdown of the thyristor has caused damage to other components of the module (such as cooling water pipes, etc.). Measure and record the impedance value Z at both ends of the module after the breakdown of the bypass thyristor. 击穿 , the experiment ends.

[0088] Step A5: If the energy dissipation branch resistor R2 is not observed to burst within the set total test time Tset, but the voltage U across the module energy dissipation branch resistor is monitored at the same time, R2 The value is always equal to U C1 The voltage suddenly changes to close to 0V and remains at 0V. This indicates that the bonding wire inside the IGBT device in the energy dissipation branch has exceeded its tolerance energy limit and melted before the energy dissipation resistor explodes. At this time, the voltage U is recorded when the voltage across the energy dissipation resistor suddenly changes to 0. R2 、U C1 、U SCR , temperature T R2 Then continue with steps A5.1 to A5.2.

[0089] Step A5.1: Continue to monitor the voltage U across the module energy dissipation branch resistor R2, the module DC capacitor C1, and the module AC port (i.e., across the module bypass thyristor SCR) after the voltage across the energy dissipation branch resistor suddenly changes to close to 0V. R2 、U C1 、U SCRThe voltage across the energy-discharging resistor suddenly changes to close to 0V, which means that the bonding wire inside the energy-discharging branch welded IGBT device has melted, causing the energy-discharging branch welded IGBT device to electrically switch from a short-circuit state to an open-circuit state. At this time, the energy-discharging branch is cut off, and the module capacitor C1 cannot continue to discharge quickly through the energy-discharging branch. At this time, the voltage of the module DC capacitor C1 will continue to rise until it breaks down the module bypass thyristor SCR. Record the voltage value U at the moment of bypass thyristor SCR breakdown. SCR击穿 , monitor the voltage U across the module energy dissipation branch resistor during this process R2 It should always be 0V;

[0090] Step A5.2: Adjust the output current of the controlled current source Is to 0, and wait for the voltage U C1 After the voltage drops to 0, enter the closed test space, conduct on-site inspection and record whether there are any solid particles splashing out of the internal components of the module around the tested energy self-balancing power module, then remove the module cover to check and record the status of the energy dissipation resistor, and simultaneously record the status of the module bypass thyristor after breakdown and whether the thyristor breakdown has caused damage to other components of the module (such as cooling water pipes, etc.), and measure and record the impedance value Z at both ends of the module after the bypass thyristor breakdown 击穿 , the experiment ends.

[0091] Step A6: If the energy dissipation branch resistor R2 is not observed to burst and the voltage U across the module energy dissipation branch resistor is not monitored within the set total test time Tset, R2 The value is always equal to U C1 The voltage suddenly changes to close to 0V and remains at 0V, but the surface temperature T R2 Never exceeds its tolerance upper limit T max , it means that the energy discharge branch will remain in the connected state during the startup and charging phase of the project, the energy discharge resistor R2 will not burst, the entire module will enter a dynamically stable state, and the test is completed.

[0092] Example 3:

[0093] Unlocking the extreme operating conditions test method during the operation phase (high current):

[0094] The test object is not less than 1 complete energy self-balancing half-bridge power module or 1 complete energy self-balancing full-bridge power module, the water cooling system needs to be started when the tested energy self-balancing power module is tested, the welding IGBT (T3 for half-bridge and T5 for full-bridge) of the energy release branch of the tested energy self-balancing power module adopts normal devices supplied by engineering (electrically characterized as open circuit state without triggering and short circuit state with triggering) but the welding IGBT drive board of the energy release branch of the tested energy self-balancing power module is continuously powered by an independent power supply independent of the module (not affected by the voltage change of the module) and is connected with the operation interface of the valve segment operation test platform through an additional pair of communication optical fibers.

[0095] Step B1: install the tested energy self-balancing power module in the middle position of the tested valve segment (one valve segment is composed of multiple modules in series) of the valve segment operation test platform, disconnect the input power supply of the bypass switch drive board of the tested energy self-balancing module (to simulate the failure of the module bypass switch), and place the entire test circuit in a closed test space with explosion-proof capability;

[0096] Step B2: first start the water cooling system and start the valve segment operation test platform, set the test parameters through the platform operation interface, and make the platform operation current I 运行 flowing through the tested module consistent with the actual operation current I arm of the flexible direct current project unlocking operation stage, and after the voltage of the tested power module is stabilized near the rated voltage U 额定 and the cooling water inlet temperature of the tested energy self-balancing power module is stabilized (the temperature fluctuation is not more than 2 ℃), the tested power module is normally put into operation / cut off;

[0097] Step B3: the set test total time is Tset, the "put into operation" instruction is continuously issued to the welding IGBT drive board of the energy release branch of the tested energy self-balancing power module through the test platform operation interface during the test, the welding IGBT of the energy release branch is always in the on state (to simulate the misopening of the device), the tested energy self-balancing power module will immediately enter the locking state after receiving the above-mentioned instruction, the test is continuously carried out, the values of the energy release branch resistance R2, the module direct current capacitor C1, the voltage U R2 , U C1 , U SCR at both ends of the module alternating current port (i.e. the two ends of the module bypass thyristor SCR) of the tested energy self-balancing power module are monitored and recorded in real time during the test, the surface temperature T R2 of the energy release branch resistance R2 of the tested energy self-balancing power module is synchronously monitored, and whether the energy release branch resistance R2 explodes is observed;

[0098] Step B4: if the energy release branch resistance R2 explodes and the voltage UR2 the voltage U across the module DC capacitor C1 C1 The values are always equal, indicating that the bonding wires inside the welding IGBT device of the energy releasing branch have not exceeded their upper limit of energy resistance before the energy releasing branch resistance explodes. At this time, the voltage U R2 , U C1 , U SCR , the temperature T R2 value is recorded, and then steps B4.1-B4.2 are continued to be executed.

[0099] Step B4.1: Continue to monitor the values of the voltage U R2 , U C1 , U SCR across the module energy releasing branch resistance R2, the module DC capacitor C1, and the module AC port (i.e., the voltage across the module bypass thyristor SCR). After the energy releasing branch resistance R2 explodes, it generally presents an open circuit state in electricity, at which time the energy releasing branch is cut off, and the module capacitor C1 cannot continue to discharge quickly through the energy releasing branch. At this time, the voltage of the module DC capacitor C1 will rapidly rise until the bypass thyristor SCR is broken down, and the voltage value U SCR击穿 at the moment of the breakdown of the bypass thyristor SCR is recorded. Monitor the voltage U R2 across the module energy releasing branch resistance and the voltage U C1 across the module DC capacitor C1 during this process, and the values should always remain equal.

[0100] Step B4.2: Adjust the output current of the valve section operation test platform to 0, and after the voltage U C1 of the module capacitor C1 drops to 0, enter the closed test space, and on-site check and record whether there are solid particles of the internal components of the tested energy self-balancing power module flying out from all around. Then, remove the module cover plate to check and record the state after the energy releasing resistance explodes and whether the resistance explosion causes damage to other components (such as cooling water pipes, etc.) of the module. Simultaneously, record the state after the breakdown of the module bypass thyristor and whether the breakdown of the thyristor causes damage to other components (such as cooling water pipes, etc.) of the module, and measure and record the impedance value Z 击穿 across the module bypass thyristor after the breakdown of the thyristor. The test is ended.

[0101] Step B5: If the energy releasing branch resistance R2 has not exploded within the set total test duration Tset, but the voltage U R2 across the module energy releasing branch resistance is continuously monitored to be equal to U C1The sudden change of the voltage across the energy releasing branch resistor to near 0V and then to 0V indicates that the bonding wire inside the energy releasing branch IGBT device has been fused before the explosion of the energy releasing resistor, at this moment, the voltage U R2 , U C1 , U SCR , the temperature T R2 of the energy releasing resistor is recorded, and then the steps B5.1-B5.2 are continued to be executed;

[0102] Step B5.1: Continue to monitor the voltage U R2 , U C1 , U SCR across the module energy releasing branch resistor R2, the module DC capacitor C1 and the module AC port (i.e. the two terminals of the module bypass thyristor SCR) after the voltage across the energy releasing branch resistor suddenly changes to near 0V. The sudden change of the voltage across the energy releasing branch resistor to near 0V means that the bonding wire inside the energy releasing branch IGBT device has been fused, which causes the energy releasing branch IGBT device to change from a short-circuit state to an open-circuit state, at this moment, the energy releasing branch is cut off, and the module capacitor C1 cannot continue to discharge quickly through the energy releasing branch, at this moment, the voltage of the module DC capacitor C1 will rapidly rise until the module bypass thyristor SCR is broken down, and the voltage value U SCR击穿 of the module bypass thyristor SCR at the moment of breakdown is recorded. During this process, the voltage U R2 across the module energy releasing branch resistor should always remain 0V.

[0103] Step B5.2: Adjust the output current of the valve segment operation test platform to 0, and after the voltage U C1 of the module capacitor C1 drops to 0, enter the closed test space, and on-site check and record whether there are solid particles of the internal components of the tested energy self-balancing power module flying out around the module, then remove the cover plate of the module to check and record the state of the energy releasing resistor, synchronously record the state of the module bypass thyristor after breakdown and whether the breakdown of the thyristor causes damage to other components (such as cooling water pipes, etc.) of the module, and measure and record the impedance value Z 击穿 across the two terminals of the module bypass thyristor after breakdown. The test is ended.

[0104] Step B6: If the explosion of the energy releasing branch resistor R2 is not observed and the voltage U R2 across the module energy releasing branch resistor always remains equal to U C1 and then suddenly changes to near 0V and remains 0V within the set total test time Tset, but the surface temperature T R2 of the energy releasing resistor always does not exceed the upper limit value T max of its tolerance, then the test is ended., it indicates that the energy dissipation branch will be maintained in the input state during the unlocking operation phase of the project, the energy dissipation resistor R2 will not burst, and the whole module will enter a dynamic stable state, and the test is ended.

[0105] The test method for the extreme working condition of the energy self-balancing power module provided in the embodiment of the application divides the test into two scenes of "pre-unlocking start charging phase (small current)" and "post-unlocking steady state operation phase (large current)", and respectively carries out the test of the extreme working condition of the energy self-balancing power module in the two scenes, and respectively obtains two kinds of extreme working condition test data. Thus, the problem that the reliability of the energy self-balancing power module after being put into operation in the actual project cannot be judged due to the fact that the energy self-balancing power module has not been tested in the extreme working condition, i.e., the fault of the module bypass switch refusing to act in the case of the energy dissipation branch of the energy self-balancing power module mis-opening the welding type IGBT device, is solved.

[0106] The above is the test method for the extreme working condition of the energy self-balancing power module provided in the embodiment of the application, and the following is a test system for the extreme working condition of the energy self-balancing power module provided in the embodiment of the application.

[0107] Please refer to Figure 4 The test system for the extreme working condition of the energy self-balancing power module provided in the embodiment of the application comprises:

[0108] The judgment unit 201 is used for determining the phase of the extreme working condition according to the current value of the tested energy self-balancing power module, and the phase comprises: the pre-unlocking start charging phase and the post-unlocking steady state operation phase of the tested energy self-balancing power module.

[0109] The configuration unit 202 is used for respectively configuring the test tools and test environment used for the test of the pre-unlocking start charging phase and the post-unlocking steady state operation phase.

[0110] The first control unit 203 is used for, in the pre-unlocking start charging phase, constructing a first test loop, placing the first test loop in the corresponding test environment, outputting the same current as the actual charging current in the start charging phase of the flexible direct current project from the tested energy self-balancing power module, determining the first test total time, controlling the tested energy self-balancing power module to always be in the locked state, and real-time monitoring the first running parameter and the first working state of each component in the energy dissipation branch of the tested energy self-balancing power module.

[0111] The first analysis unit 204 is used for, based on the first test total time, according to the first running parameter and the first working state, analyzing the test state of the tested energy self-balancing power module in the extreme working condition, recording the running parameter at the corresponding moment, and obtaining the extreme working condition test data of the tested energy self-balancing power module in the pre-unlocking start charging phase.

[0112] The second control unit 205 is configured to, in the post-unlocking steady state running phase, construct a second test loop, place the second test loop in a corresponding test environment, control a running current of the second test loop to be the same as an actual charging current in the flexible direct current engineering unlocking running phase, determine a second total test duration, control the tested energy self-balancing power module to be always in a locking state, and monitor second running parameters and second working states of each component in an energy releasing branch of the tested energy self-balancing power module in real time.

[0113] The second analysis unit 206 is configured to, based on the second total test duration, analyze a test state of the tested energy self-balancing power module in the extreme working condition according to the running parameters and the second working states, record the running parameters at corresponding moments, and obtain extreme working condition test data of the tested energy self-balancing power module in the post-unlocking steady state running phase.

[0114] Further, the embodiment of the present application further provides an energy self-balancing power module extreme working condition test device, the device comprising a processor and a memory:

[0115] The memory is configured to store program code and transmit the program code to the processor.

[0116] The processor is configured to execute steps of the energy self-balancing power module extreme working condition test method according to instructions in the program code.

[0117] Further, the embodiment of the present application further provides a computer readable storage medium, the computer readable storage medium is configured to store program code, and the program code is configured to execute the energy self-balancing power module extreme working condition test method.

[0118] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0119] In the several embodiments of the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic. The division of the units is only a logical function division. There can be another division manner for actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0120] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., may be located in one place, or may be distributed to multiple network units. Part or all of the units may be selected according to actual needs to achieve the purpose of the embodiment.

[0121] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0122] If the integrated unit is realized in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method of each embodiment of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

[0123] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A test method for extreme working conditions of energy self-balancing power module, characterized in that: include: Determining a stage at which an extreme operating condition occurs according to a current value of the energy self-balancing power module under test, wherein the stage includes: a start-up charging stage before unlocking and a steady-state operation stage after unlocking of the energy self-balancing power module under test; Configuring test tools and test environments for testing in the pre-unlocking startup charging phase and the post-unlocking steady-state operation phase, respectively; During the pre-unlocking charging phase, a first test circuit is constructed, the first test circuit is placed in the corresponding test environment, and a current equal to an actual charging current during the startup charging phase of the flexible direct current project is output to the tested energy self-balancing power module, a total duration of the first test is determined, the tested energy self-balancing power module is controlled to always be in a locked state, and first operating parameters and a first working state of each component in the energy discharge branch of the tested energy self-balancing power module are monitored in real time; Based on the total duration of the first test, according to the first operating parameters and the first operating state, analyzing the test state of the tested energy self-balancing power module under extreme operating conditions, and recording the operating parameters at corresponding moments, to obtain extreme operating condition test data of the tested energy self-balancing power module during the startup charging phase before unlocking; During the post-unlocking steady-state operation phase, a second test loop is constructed, the second test loop is placed in the corresponding test environment, and the operating current of the second test loop is controlled to be the same as the actual charging current during the unlocking operation phase of the flexible direct current project. The total duration of the second test is determined, the energy self-balancing power module under test is controlled to always be in a locked state, and the second operating parameters and second working state of each component in the energy discharge branch of the energy self-balancing power module under test are monitored in real time; Based on the total duration of the second test, according to the operating parameters and the second working state, the test state of the tested energy self-balancing power module under extreme working conditions is analyzed, and the operating parameters at the corresponding time are recorded to obtain the extreme working condition test data of the tested energy self-balancing power module in the steady-state operation stage after unlocking.

2. The test method for extreme working conditions of energy self-balancing power module according to claim 1, characterized in that: The configuration of the test tools and environment for testing the pre-unlocking startup charging phase and the post-unlocking steady-state operation phase respectively includes: During the pre-unlock startup charging phase, a normal IGBT chip in the energy dissipation branch IGBT device of the energy self-balancing power module under test is replaced with a short-circuited and failed IGBT chip, and the chip is packaged into a complete welded IGBT device, and a water cooling system is configured to cool the energy self-balancing power module under test; During the post-unlocking steady-state operation phase, the energy-draining branch welded IGBT of the energy-draining branch welded IGBT under test is a normal device, but the driving board of the energy-draining branch welded IGBT is continuously powered by an independent power supply, and is equipped with a communication channel for communicating with the test operation platform, and is configured with a water cooling system for cooling the energy-draining branch welded IGBT under test.

3. The test method for extreme working conditions of energy self-balancing power module according to claim 1, characterized in that: The construction of the first test loop comprises: The energy self-balancing power module under test is connected in parallel with a controlled current source Is, and the input power supply of the bypass switch driving board of the energy self-balancing power module under test is disconnected.

4. The test method for extreme working conditions of energy self-balancing power module according to claim 1, characterized in that: The real-time monitoring of the first operating parameters and the first working state of each component in the energy dissipation branch of the energy self-balancing power module under test includes: Real-time monitoring of the resistance R2 of the energy dissipation branch of the energy self-balancing power module under test, the module DC capacitor C1, and the voltage U at both ends of the module AC port R2 、U C1 、U SCR The surface temperature T of the energy dissipation branch resistor R2 of the energy self-balancing power module under test is monitored simultaneously. R2 , and observe whether the energy dissipation branch resistor R2 explodes.

5. The test method for extreme working conditions of energy self-balancing power module according to claim 4, characterized in that: Based on the total duration of the first test, according to the first operating parameters and the first working state, analyzing the test state of the tested energy self-balancing power module under extreme working conditions, and recording the operating parameters at corresponding moments, obtaining the extreme working condition test data of the tested energy self-balancing power module in the charging stage before unlocking, including: During the first test duration, according to whether the energy dissipation branch resistor R2 explodes, and in combination with the energy dissipation branch resistor R2, the module DC capacitor C1, and the voltage U across the module AC port R2 、U C1 、U SCR The value of the energy dissipation branch resistor R2, the surface temperature T R2 , the test state of the tested energy self-balancing power module under extreme working conditions is analyzed, and the operating parameters at the corresponding time are recorded to obtain the extreme working condition test data of the tested energy self-balancing power module in the charging stage before unlocking.

6. The method for testing an energy self-balancing power module under extreme operating conditions according to claim 1, characterized in that: The second test loop is constructed, comprising: The energy self-balancing power module under test is installed in the middle position of the test valve section of the valve section operation test platform, wherein the test valve section is composed of several modules connected in series, and the input power of the bypass switch driving board of the energy self-balancing power module under test is disconnected.

7. The method for testing an energy self-balancing power module under extreme operating conditions according to claim 1, characterized in that: The real-time monitoring of the second operating parameters and the second working state of each component in the energy dissipation branch of the energy self-balancing power module under test includes: Real-time monitoring of the resistance R2 of the energy dissipation branch of the energy self-balancing power module under test, the module DC capacitor C1, and the voltage U at both ends of the module AC port R2 、U C1 、U SCR The surface temperature T of the energy dissipation branch resistor R2 of the energy self-balancing power module under test is monitored simultaneously. R2 , and observe whether the energy dissipation branch resistor R2 explodes.

8. The method for testing an energy self-balancing power module under extreme operating conditions according to claim 7, characterized in that: Based on the total duration of the second test, according to the operating parameters and the second working state, the test state of the tested energy self-balancing power module under extreme working conditions is analyzed, and the operating parameters at corresponding moments are recorded to obtain the extreme working condition test data of the tested energy self-balancing power module in the steady-state operation stage after unlocking, including: During the second test duration, according to whether the energy dissipation branch resistor R2 explodes, and in combination with the energy dissipation branch resistor R2, the module DC capacitor C1, and the voltage U across the module AC port R2 、U C1 、U SCR The value of the energy dissipation branch resistor R2, the surface temperature T R2 , analyze the test state of the tested energy self-balancing power module under extreme working conditions, and record the operating parameters at the corresponding time to obtain the extreme working condition test data of the tested energy self-balancing power module in the steady-state operation stage after unlocking.

9. The method for testing an energy self-balancing power module under extreme operating conditions according to any one of claims 1 to 8, characterized in that: The energy self-balancing power module under test is: an energy self-balancing half-bridge power module or an energy self-balancing full-bridge power module.

10. A test system for extreme working conditions of energy self-balancing power modules, characterized in that: include: A judgment unit, configured to determine a stage in which an extreme operating condition occurs according to a current value of the energy self-balancing power module under test, wherein the stage includes: a start-up charging stage before unlocking and a steady-state operation stage after unlocking of the energy self-balancing power module under test; a configuration unit, configured to configure test tools and a test environment for conducting tests in the pre-unlocking startup charging phase and the post-unlocking steady-state operation phase, respectively; a first control unit, configured to initiate a charging phase before unlocking, construct a first test loop, place the first test loop in the corresponding test environment, output a current to the tested energy self-balancing power module that is the same as an actual charging current during the startup charging phase of the flexible direct current project, determine a total duration of the first test, control the tested energy self-balancing power module to always be in a locked state, and monitor in real time a first operating parameter and a first working state of each component in an energy discharge branch of the tested energy self-balancing power module; a first analyzing unit, configured to analyze, based on the total duration of the first test, the first operating parameter, and the first operating state, the test state of the tested energy self-balancing power module under extreme operating conditions, and simultaneously record the operating parameters at corresponding moments, to obtain extreme operating condition test data of the tested energy self-balancing power module during the charging phase before unlocking; a second control unit, configured to construct a second test loop during the post-unlocking steady-state operation phase, place the second test loop in the corresponding test environment, control the operating current of the second test loop to be the same as the actual charging current during the unlocking operation phase of the flexible direct current project, determine the total duration of the second test, control the tested energy self-balancing power module to always be in a locked state, and monitor in real time the second operating parameters and second working state of each component in the energy discharge branch of the tested energy self-balancing power module; The second analysis unit is used to analyze the test state of the tested energy self-balancing power module under extreme working conditions based on the total duration of the second test, the operating parameters and the second working state, and record the operating parameters at the corresponding time to obtain the extreme working condition test data of the tested energy self-balancing power module in the steady-state operation stage after unlocking.

11. A test device for extreme working conditions of energy self-balancing power module, characterized in that: The device includes a processor and a memory: The memory is used to store program code and transmit the program code to the processor; The processor is used to execute the test method for extreme working conditions of the energy self-balancing power module according to any one of claims 1 to 9 according to the instructions in the program code.

12. A computer-readable storage medium, characterized in that The computer-readable storage medium is used to store program code, and the program code is used to execute the test method for extreme working conditions of the energy self-balancing power module according to any one of claims 1 to 9.

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