Power Component Test Power Supply and Power Diode Component Test Platform

Abstract

The present invention discloses a power component test power supply and a power diode component test platform. The power component test power supply includes: a commutation module capable of outputting a periodic current and / or a periodic voltage; an electrical stress module capable of outputting a voltage of a preset magnitude and / or outputting a current of a preset magnitude; a switching module. Both the commutation module and the electrical stress module are connected to the input end of the switching module, and the output end of the switching module can be connected to the power component to be tested. The switching module can control the conduction or cutoff between the commutation module and the power component to be tested and between the electrical stress module and the power component to be tested. By controlling one of the commutation module and the electrical stress module to conduct with the component to be tested through the switching module, it is possible to select to use the commutation module or the electrical stress module for testing according to the test requirements.

Description

Technical Field

[0001] The present invention relates to a power component test platform, and particularly to a power component test power supply and a power diode component test platform. Background Art

[0002] Power diode components are often used in power facilities, such as converter stations. When power diode components work, the voltage stress and current stress are relatively large. Since the consequences caused by power facility failures are relatively significant, the reliability requirements for power diode components are relatively high, and thus the performance requirements for power diode components are relatively strict.

[0003] In order to know the performance of power diode components, generally, a test power supply is used to generate voltage and current to drive the power diode components to work, so as to facilitate the testing of power diode components. However, the existing power supplies cannot simulate the actual performance of power diode components under the working environment of a converter station for continuous periodic current, abnormally large current or high voltage. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a power component test power supply, which can simulate and output current and / or voltage under the working environment of a converter station through a commutation module, and can also switch to output a preset current and / or voltage through an electrical stress module to meet the test requirements.

[0005] The present invention also provides a power component test power supply and a power diode component test platform, which can simulate the working environment of a converter station to test power diode components, and can also switch to output a preset current and / or voltage to test the performance of power diode components under abnormally large current and high voltage environments.

[0006] The power component test power supply according to the first aspect embodiment of the present invention includes: a commutation module, which can generate periodic current and / or periodic voltage; an electrical stress module, which can output a preset voltage and / or output a preset current; a switching module, both the commutation module and the electrical stress module are connected to the input end of the switching module, and the output end of the switching module can be connected to the power component to be tested. The switching module can control the conduction or cut-off between the commutation module and the power component to be tested and between the electrical stress module and the power component to be tested.

[0007] The power component test power supply according to the embodiments of the present invention has at least the following beneficial effects: The commutation module outputs a periodic current and / or voltage to drive the power component to be tested, so as to achieve the effect of simulating the working environment of a commutation station. The electrical stress module outputs a preset current and / or voltage to be able to simulate the situation of an abnormally large current and / or high voltage, which is convenient for subsequent detection to know the working performance of the power component to be tested under the condition of an abnormally large current and / or high voltage. In addition, the switching module controls one of the commutation module and the electrical stress module to conduct with the component to be tested, so as to be able to select to use the commutation module or the electrical stress module for testing according to the test requirements to meet the needs.

[0008] According to some embodiments of the present invention, the commutation module includes a first filtering unit, a first voltage transformation unit, a first rectification unit, and an inversion unit connected in sequence, and the first rectification unit is connected to the switching module.

[0009] According to some embodiments of the present invention, the commutation module further includes a reactor, and the first rectification unit is connected to the inversion unit through the reactor.

[0010] According to some embodiments of the present invention, the first voltage transformation unit is a three-winding transformer, the output end of the three-winding transformer is connected to the input end of the first rectification unit, the first input end of the three-winding transformer can be connected to an external power supply, and the second input end of the three-winding transformer is connected to the output end of the inversion unit.

[0011] According to some embodiments of the present invention, the electrical stress module includes a voltage module and a current module. Both the voltage module and the current module are connected to the input end of the switching module. The switching module can control the conduction or cut-off between the voltage module and the power component to be tested and between the current module and the power component to be tested. The voltage module can output a preset voltage, and the current module can output a preset current.

[0012] According to some embodiments of the present invention, the voltage module includes a second filtering unit, a second voltage transformation unit, a second rectification unit, and an oscillation unit connected in sequence, and the oscillation unit is connected to the switching module.

[0013] According to some embodiments of the present invention, the oscillation unit includes a capacitor C21, a capacitor C23, a thyristor ZJ22, an inductor L22, an inductor L23, a resistor R20, and a resistor R23;

[0014] One end of the resistor R20 is connected to the second rectification unit, and the other end of the resistor R20 is respectively connected to one end of the thyristor ZJ22 and one end of the capacitor C21;

[0015] The other end of the thyristor ZJ22 is connected to one end of the inductor L22;

[0016] The other end of the inductor L22 is connected to one end of the resistor R23 and one end of the capacitor C23;

[0017] The other end of the resistor R23 is connected to the switching module through the inductor L23;

[0018] The other end of the capacitor C21 and the other end of the capacitor C23 are both connected to the second rectifying unit.

[0019] According to some embodiments of the present invention, the current module includes at least one set of current components and an inductor. The current components include a third voltage transformation unit, a third rectifying unit, a switching unit, and an energy storage capacitor connected in sequence. The inductor is connected to the energy storage capacitor and the inductor is connected to the switching module.

[0020] According to some embodiments of the present invention, the switching module includes a control unit, a first thyristor component, a second thyristor component, and a third thyristor component. The control unit is respectively connected to the control terminals of the first thyristor component, the second thyristor component, and the third thyristor component. The commutation module is connected to the first thyristor component, the voltage module is connected to the second thyristor component, the current module is connected to the third thyristor component, and the first thyristor component, the second thyristor component, and the third thyristor component can all be connected to the power component to be measured.

[0021] According to some embodiments of the present invention, a power diode component test platform according to the second aspect embodiment of the present invention includes the power component test power supply as described above, and further includes a power diode component and a detection module. The switching module is connected to the power diode component, and the detection module is connected to the power diode component to detect the current and / or voltage of the power diode component.

[0022] The power diode component test platform according to the embodiment of the present invention has at least the following beneficial effects: By means of the switching module, it controls the conduction or cut-off between the commutation module or the electrical stress module and the power diode component. When the commutation module is conducting with the power diode component, the commutation module generates a periodic current and / or a periodic voltage and applies them to the power diode component, so as to simulate the working environment of the commutation station and test the effect of the power diode component. By means of the detection module, the current and / or voltage of the power diode component are detected, and the performance of the power diode component when operating in the commutation station can be known. When the electrical stress module is conducting with the power diode component, the electrical stress module generates a current and / or a voltage of a preset magnitude and applies them to the power diode component, so as to simulate the situation of high voltage and abnormally large current. Through the detection module, the performance of the power diode component in the environment of high voltage and abnormally large current can be known. In this way, the performance of the power diode component in actual operation can be tested more comprehensively, meeting the usage requirements.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0025] Figure 1 It is a circuit diagram of one embodiment of the present invention. Detailed Embodiments

[0026] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that with respect to the orientation description, such as up, down, front, back, left, right, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

[0028] In the description of the present invention, if the first and the second are described only for the purpose of distinguishing technical features, they should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as "setting", "installation", and "connection" should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0030] As Figure 1 shown, the power component test power supply according to an embodiment of the present invention includes: a commutation module 100, the commutation module 100 being capable of generating a periodic current and / or a periodic voltage; an electrical stress module 200, the electrical stress module 200 being capable of outputting a voltage of a preset magnitude and / or outputting a current of a preset magnitude; a switching module 300, both the commutation module 100 and the electrical stress module 200 being connected to the input end of the switching module 300, the output end of the switching module 300 being capable of being connected to a power component to be tested, and the switching module 300 being capable of controlling the conduction or cutoff between the commutation module 100 and the power component to be tested and between the electrical stress module 200 and the power component to be tested.

[0031] The commutation module 100 outputs and generates a periodic current and / or voltage to drive the power component to be tested to work, achieving the effect of simulating the working environment of a commutation station. The electrical stress module 200 outputs and generates a current and / or voltage of a preset magnitude to be able to simulate the situation of an abnormally large current and / or a high voltage, facilitating subsequent detection of the working performance of the power component to be tested under the condition of an abnormally large current and / or a high voltage. In addition, by controlling the switching module 300 to conduct one of the commutation module 100 and the electrical stress module 200 with the component to be tested, it is possible to select to use the commutation module 100 or the electrical stress module 200 for testing according to the test requirements, meeting the needs.

[0032] Referring to Figure 1 , in some embodiments of the present invention, the commutation module 100 includes a first filtering unit 110, a first voltage transformation unit 120, a first rectification unit 130, and an inversion unit 140 connected in sequence, and the first rectification unit 130 is connected to the switching module 300.

[0033] The first voltage transformation unit 120 can be connected to a power supply such as the commercial power to obtain an input voltage, which is transmitted to the first rectification unit 130 after voltage transformation processing, the first rectification unit 130 performs rectification processing and then transmits it to the inversion unit 140, and the inversion unit 140 performs inversion processing and then outputs, thereby being able to simulate the working environment of a commutation station. When the first rectification unit 130 works, it will generate a periodic voltage and a periodic current of a certain amplitude. The first rectification unit 130 is connected to the switching module 300, that is, the switching module 300 can control the conduction or cutoff between the first rectification unit 130 and the power component to be tested. When the first rectification unit 130 and the power component to be tested are conducting, the periodic voltage and periodic current generated by the first rectification unit 130 are applied to the power component to be tested, facilitating the testing of the power component by simulating the working environment of the commutation station.

[0034] By providing the first filtering unit 110, harmonic components in the absorbed voltage and current can be filtered out to meet the grid injection requirements.

[0035] The first filtering unit 110 can be implemented as including a single group or multiple groups of LC circuits, or can also be implemented as other common filtering circuits. The first voltage transformation unit 120 can be implemented as common devices such as three-phase transformers. The first rectification unit 130 can be implemented as circuits or devices with rectification effects such as common full-bridge rectification circuits. The inversion unit 140 can be implemented as circuits or devices such as common inversion circuits or inverters.

[0036] Refer to Figure 1 , in some embodiments of the present invention, the commutation module 100 further includes a reactor 150, and the first rectification unit 130 is connected to the inversion unit 140 through the reactor 150.

[0037] The first rectification unit 130 is connected to the inversion unit 140 through the reactor 150. The reactor 150 can filter out the ripple in the DC current output by the first rectification unit 130, which is beneficial to making the current output by the commutation module 100 closer to the working environment of an actual commutation station.

[0038] Refer to Figure 1 , in some embodiments of the present invention, the first voltage transformation unit 120 is a three-winding transformer. The output end of the three-winding transformer is connected to the input end of the first rectification unit 130. The first input end of the three-winding transformer can be connected to an external power supply, and the second input end of the three-winding transformer is connected to the output end of the inversion unit 140.

[0039] Using a three-winding transformer, an external power supply, such as mains power, is input to the first input end of the three-winding transformer. After voltage transformation, rectification, and inversion processing, alternating current is generated from the output end of the inversion unit 140. By connecting the output end of the inversion unit 140 to the second input end of the three-winding transformer, the alternating current output by the inversion unit 140 is re-input to the three-winding transformer, which can achieve the effect of energy feedback. It is beneficial to realizing the working environment of an analog commutation station while reducing power loss, saving energy, and improving efficiency.

[0040] Refer to Figure 1 , in some embodiments of the present invention, the electrical stress module 200 includes a voltage module 210 and a current module 220. Both the voltage module 210 and the current module 220 are connected to the input end of the switching module 300. The switching module 300 can control the conduction or cut-off between the voltage module 210 and the power component to be measured and between the current module 220 and the power component to be measured. The voltage module 210 can output a preset voltage, and the current module 220 can output a preset current.

[0041] The voltage module 210 generates a voltage of a preset magnitude and applies it to the power component to be tested, enabling the testing of the operating performance of the power component to be tested under high voltage conditions; in addition, the current module 220 generates a current of a preset magnitude and applies it to the power component to be tested, enabling the simulation of the operating performance of the power component to be tested when a large current flows through it under abnormal conditions. By controlling the switching module 300 to select the commutation module 100, the voltage module 210, or the current module 220 to conduct with the power component to be tested, the operating performance of the power component to be tested in different situations can be tested, so as to more comprehensively test the performance of the power component to be tested.

[0042] Refer to Figure 1 In some embodiments of the present invention, the voltage module 210 includes a second filtering unit 211, a second voltage transformation unit 212, a second rectification unit 213, and an oscillation unit 214 that are connected in sequence, and the oscillation unit 214 is connected to the input end of the switching module 300.

[0043] The input end of the second voltage transformation unit 212 can be connected to a power supply such as the mains power supply. The input alternating current is transformed and rectified and then converted into direct current and transmitted to the oscillation unit 214. The oscillation unit 214 forms a periodic high voltage through voltage oscillation. When the switching module 300 controls the oscillation unit 214 to conduct with the power component to be tested, the power component to be tested can be tested under high voltage conditions.

[0044] The second filtering unit 211 can filter out and absorb the harmonic components of the voltage and current, which is beneficial to reducing the impact on the external power grid.

[0045] The second filtering unit 211 can be an implementation manner including a single group or multiple groups of LC circuits, or can also be an implementation manner of other common filtering circuits. The second voltage transformation unit 212 can be an implementation manner of common devices such as a three-phase transformer. The second rectification unit 213 can be an implementation manner of a circuit or device with a rectification effect such as a common full-bridge rectification circuit or a rectifier. The oscillation unit 214 can be an implementation manner including a switching valve cooperating with a CLC oscillation circuit or an LC oscillation circuit that can achieve a voltage oscillation effect.

[0046] Refer to Figure 1 In some embodiments of the present invention, the oscillation unit 214 includes a capacitor C21, a capacitor C23, a thyristor ZJ22, an inductor L22, an inductor L23, a resistor R20, and a resistor R23;

[0047] One end of the resistor R20 is connected to the second rectification unit 213, and the other end of the resistor R20 is respectively connected to one end of the thyristor ZJ22 and one end of the capacitor C21;

[0048] The other end of the thyristor ZJ22 is connected to one end of the inductor L22;

[0049] The other end of the inductor L22 is connected to one end of the resistor R23 and one end of the capacitor C23;

[0050] The other end of the resistor R23 is connected to the switching module 300 through the inductor L23;

[0051] The other end of the capacitor C21 and the other end of the capacitor C23 are both connected to the second rectifying unit 213.

[0052] The second rectifying unit 213 outputs direct current and transmits it to the CLC oscillation circuit composed of the capacitor C21, the capacitor C23, the inductor L22, and the thyristor ZJ22. The CLC oscillation circuit generates a high voltage. When the switching module 300 is turned on, the CLC oscillation circuit applies the high voltage to the power component to be measured through the resistor R23 and the inductor L23, achieving the high voltage test effect.

[0053] Refer to Figure 1 , in some embodiments of the present invention, the current module 220 includes at least one set of current components 221 and an inductor 222. The current component 221 includes a third voltage transformation unit 223, a third rectifying unit 224, a switching unit 225, and an energy storage capacitor 226 connected in sequence. The inductor 222 is connected to the energy storage capacitor 226, and the inductor 222 is connected to the switching module 300.

[0054] The input end of the third voltage transformation unit 223 is connected to an external power supply such as the mains power. After voltage transformation and rectification by the third rectifying unit 224, direct current is formed. When the switching unit 225 is closed, the direct current charges the energy storage capacitor 226, and the energy storage capacitor 226 stores electrical energy; when the switching unit 225 is opened and the switching unit controls the conduction between the energy storage capacitor 226 and the power component to be measured, the energy storage capacitor 226 releases electrical energy to form a current flowing to the power component to be measured, so as to test the power component to be measured. At the same time, the connection between the energy storage capacitor 226 and the inductor 222 causes the output current to oscillate, which is more in line with the actual use situation.

[0055] When the switching unit 225 is just closed, according to the characteristics of the energy storage capacitor 226, it may cause an excessive current in the loop formed by the third rectifying unit 224, the switching unit, and the energy storage capacitor 226. In this regard, the current component 221 further includes a current limiting resistor, and the current limiting resistor is connected to the energy storage capacitor 226 to limit the current magnitude in the above loop and avoid damage to components due to excessive current.

[0056] In some embodiments of the present invention, when there are multiple sets of current components 221, each set of current components 221 further includes a sub-switching unit 227. The energy storage capacitors 226 in different current components 221 are connected in parallel and then connected to the inductor 222. The inductor 222 is connected to the energy storage capacitor 226 through the sub-switching unit 227 in each set of current components 221. With this structure, by controlling the conduction of the sub-switching unit 227, the energy storage capacitor 226 in the same set of current components 221 can be controlled to release electrical energy. The output voltages of the third voltage conversion units 223 in different current components 221 and the capacitances of the energy storage capacitors 226 can be different, so as to form currents of different magnitudes and inject them into the power component under test; or by simultaneously controlling the conduction of two or more sub-switching units 227, the currents output by the energy storage capacitors 226 in different groups are superimposed to form a larger current flowing to the power component under test, simulating the situation of an abnormally large current. Thus, by providing the sub-switching unit 227, the magnitude of the current injected into the power component under test can be flexibly adjusted according to the test requirements, making the use more convenient.

[0057] In addition, the energy storage capacitors 226 in multiple branches are connected in parallel and then connected to the inductor 222 in the main circuit, eliminating the need to configure an inductor for each current component 221 separately, which is beneficial to saving device costs and reducing the overall volume.

[0058] The sub-switching unit 227 can be a thyristor or other common implementation methods of components with switching functions.

[0059] The third voltage conversion unit 223 can be an implementation method of common devices such as single-phase transformers. The third rectification unit 224 can be an implementation method of circuits or devices with rectification effects such as common full-bridge rectifier circuits and rectifiers. The energy storage capacitor 226 can be an implementation method of devices or circuits with energy storage functions such as capacitors.

[0060] Refer to Figure 1 , in some embodiments of the present invention, the switching module 300 includes a control unit, a first thyristor component 310, a second thyristor component 320, and a third thyristor component 330. The control unit is respectively connected to the control terminals of the first thyristor component 310, the second thyristor component 320, and the third thyristor component 330. The commutation module 100 is connected to the first thyristor component 310, the voltage module 210 is connected to the second thyristor component 320, and the current module 220 is connected to the third thyristor component 330. The first thyristor component 310, the second thyristor component 320, and the third thyristor component 330 can all be connected to the power component under test.

[0061] By controlling the conduction of the first thyristor component 310, the second thyristor component 320, and the third thyristor component 330 through the control unit, it is possible to correspondingly select whether the commutation module 100, the voltage module 210, and the current module 220 are conducted with the power component to be measured. The structure is simple and easy to implement, and the thyristor component is suitable for working environments with large current and high power, meeting the usage requirements.

[0062] The first thyristor component 310 and the third thyristor component 330 can be embodiments including a single thyristor, or can also be embodiments including the thyristor and auxiliary components such as heat dissipation components and absorption components cooperating with the thyristor. Since the voltage output by the voltage module 210 is relatively high, the second thyristor component 320 also needs to play an isolation role, and the second thyristor component 320 needs to be an embodiment including the thyristor and auxiliary components.

[0063] In the case of having multiple groups of current components 221, that is, when there is a sub-switch unit 227, the control unit is connected to the control end of the sub-switch unit 227 to control the conduction of the sub-switch unit 227.

[0064] The control unit can be an embodiment including a device with control functions such as a single-chip microcomputer, a PLC, and an embedded chip cooperating with a thyristor component drive circuit, so as to be able to control the conduction of the first thyristor component 310, the second thyristor component 320, and the third thyristor component 330.

[0065] Reference Figure 1 , in some embodiments of the present invention, the first thyristor component 310, that is, the thyristor ZJ13, is connected to the first rectifying unit 130, and the periodically changing voltage of the first rectifying unit 130 can drive the thyristor ZJ13 to turn off. The second thyristor component 320, that is, the thyristor ZJ23, is connected to the inductor L23. When the thyristor ZJ23 is conducted, the high voltage of the capacitor C23 is applied to the power component to be measured, so that the power component to be measured is at a high potential. At this time, the thyristor ZJ22 is reversely conducted, so that the capacitor C23 releases electric energy to reduce the potential, and further makes the potential of the end of the thyristor ZJ23 close to the power component to be measured higher than the potential of the other end close to the capacitor C23, that is, the thyristor ZJ23 is subjected to a reverse voltage, causing the thyristor ZJ23 to turn off. The third thyristor component 330, that is, the thyristor ZJ33, is connected to the inductor 222. The energy storage capacitor 226 and the inductor 222 form an LC circuit. After the capacitor releases current, oscillations are generated, and the energy storage capacitor 226 generates a reverse voltage during the oscillation process to drive the thyristor ZJ33 to turn off. Similarly, the sub-switch unit 227, that is, the thyristor ZJ3, will also turn off under the action of the reverse voltage generated by the energy storage capacitor 226. Thus, after the first thyristor component 310, the second thyristor component 320, the third thyristor component 330, and the thyristor ZJ3 are controlled to conduct by the control unit, they can all achieve automatic turn-off, meeting the working characteristics of the thyristor.

[0066] According to the power diode component test platform of the second aspect embodiment of the present invention, it includes the above-mentioned power component test power supply, and further includes a power diode component 400 and a detection module. The switching module 300 is connected to the power diode component 400, and the detection module is connected to the power diode component 400 to detect the current and / or voltage of the power diode component 400.

[0067] The conduction or cut-off between the commutation module 100 or the electrical stress module 200 and the power diode component 400 is controlled by the switching module 300. When the commutation module 100 is conducting with the power diode component 400, the commutation module 100 generates a periodic current and / or a periodic voltage and applies it to the power diode component 400 to simulate the working environment of a converter station and test the effect of the power diode component 400. By detecting the current and / or voltage of the power diode component 400 through the detection module, the performance of the power diode component 400 when operating in a converter station can be known. When the electrical stress module 200 is conducting with the power diode component 400, the electrical stress module 200 generates a preset current and / or voltage and applies it to the power diode component 400 to simulate high voltage and abnormally large current conditions. Through the detection module, the performance of the power diode component 400 in a high voltage and abnormally large current environment can be known. In this way, the performance of the power diode component 400 in actual operation can be tested more comprehensively to meet the usage requirements.

[0068] The detection module can be an implementation manner including a current Hall sensor, a voltage transformer, a current transformer, or common voltage detection circuits, current detection circuits, etc., which can detect the voltage and current of the power diode component 400, so as to know the state of the power diode component 400 during the test.

[0069] In some embodiments of the present invention, the power diode component 400 can be an implementation manner including multiple power diodes. After the power diodes are connected in series and then connected to other auxiliary components to form a diode valve, the diode valve is respectively connected to the switching module 300 and the detection module to test the diode valve and meet the test requirements.

[0070] The technical features of the above-mentioned embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0071] Certainly, the present invention is not limited to the above embodiments. Those skilled in the art can make equivalent deformations or substitutions without departing from the spirit of the present invention, and these equivalent deformations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. Power component test power supply, characterized in that, Comprising: A commutation module (100) capable of generating a periodic current and / or a periodic voltage; An electrical stress module (200) capable of outputting a voltage of a preset magnitude and / or outputting a current of a preset magnitude; A switching module (300), both the commutation module (100) and the electrical stress module (200) are connected to the input end of the switching module (300), the output end of the switching module (300) can be connected to a power component under test, and the switching module (300) can control the conduction or cutoff between the commutation module (100) and the power component under test and between the electrical stress module (200) and the power component under test; The electrical stress module (200) includes a voltage module (210) and a current module (220), both the voltage module (210) and the current module (220) are connected to the input end of the switching module (300), the switching module (300) can control the conduction or cutoff between the voltage module (210) and the power component under test and between the current module (220) and the power component under test, the voltage module (210) can output a voltage of a preset magnitude, and the current module (220) can output a current of a preset magnitude; The switching module (300) includes a control unit, a first thyristor component (310), a second thyristor component (320), and a third thyristor component (330), the control unit is respectively connected to the control end of the first thyristor component (310), the control end of the second thyristor component (320), and the control end of the third thyristor component (330), the commutation module (100) is connected to the first thyristor component (310), the voltage module (210) is connected to the second thyristor component (320), the current module (220) is connected to the third thyristor component (330), and the first thyristor component (310), the second thyristor component (320), and the third thyristor component (330) can all be connected to the power component under test.

2. The power component test power supply according to claim 1, wherein: The commutation module (100) includes a first filtering unit (110), a first voltage transformation unit (120), a first rectification unit (130), and an inversion unit (140) connected in sequence, and the first rectification unit (130) is connected to the switching module (300).

3. The power component test power supply according to claim 2, characterized in that: The commutation module (100) further includes a reactor (150), and the first rectification unit (130) is connected to the inversion unit (140) through the reactor (150).

4. The power component test power supply according to claim 2, wherein: The first voltage transformation unit (120) is a three-winding transformer, the output end of the three-winding transformer is connected to the input end of the first rectification unit (130), the first input end of the three-winding transformer can be connected to an external power supply, and the second input end of the three-winding transformer is connected to the output end of the inversion unit (140).

5. The power component test power supply according to claim 1, wherein: The voltage module (210) includes a second filtering unit (211), a second voltage transformation unit (212), a second rectification unit (213), and an oscillation unit (214) connected in sequence. The oscillation unit (214) is connected to the switching module (300).

6. The power component test power supply according to claim 5, characterized in that: The oscillation unit (214) includes a capacitor C21, a capacitor C23, a thyristor ZJ22, an inductor L22, an inductor L23, a resistor R20, and a resistor R23; One end of the resistor R20 is connected to the second rectification unit (213), and the other end of the resistor R20 is respectively connected to one end of the thyristor ZJ22 and one end of the capacitor C21; The other end of the thyristor ZJ22 is connected to one end of the inductor L22; The other end of the inductor L22 is connected to one end of the resistor R23 and one end of the capacitor C23; The other end of the resistor R23 is connected to the switching module (300) through the inductor L23; The other ends of the capacitor C21 and the capacitor C23 are both connected to the second rectification unit (213).

7. The power component test power supply according to claim 1, wherein: The current module (220) includes at least one set of current components (221) and an inductor (222). The current components (221) include a third voltage transformation unit (223), a third rectification unit (224), a switching unit (225), and an energy storage capacitor (226) connected in sequence. The inductor (222) is connected to the energy storage capacitor (226), and the inductor (222) is connected to the switching module (300).

8. Power diode component test platform, characterized in that: The power component test power supply includes the power component test power supply according to any one of claims 1 to 7, and further includes a power diode component (400) and a detection module. The switching module (300) is connected to the power diode component (400), and the detection module is connected to the power diode component (400) to detect the current and / or voltage of the power diode component (400).

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