Device and method for testing rectifier

Abstract

The invention discloses a device and a method for testing a rectifier. The device for testing the rectifier comprises a transformer and a load module, wherein an output end of the transformer is connected with an alternating current voltage input end of the rectifier to be tested; the load module is an inverter; a direct current voltage input end of the inverter is connected with a direct currentvoltage output end of the rectifier to be tested; and an alternating current voltage output end of the inverter and the output end of the transformer are connected in parallel to the alternating current voltage input end of the rectifier to be tested. The method for testing the rectifier comprises the following steps of: starting the rectifier to be tested which is connected with the transformer and converting alternating current voltage output by the transformer into direct current voltage to be output; and starting the inverter which is connected with the rectifier to be tested and adjusting output current of the inverter. Through the device and the method for testing the rectifier, requirements on the transformer and power network capacity can be reduced, energy waste can be reduced, and testing cost can be saved.

Description

technical field [0001] The invention relates to a rectifier detection technology, in particular to a rectifier test device and method. Background technique [0002] With the rapid development of power electronics technology, rectifiers are widely used in various fields of industry as an important part of power supply devices. The high-power four-quadrant rectifier is a common rectifier, which is mainly used in the field of high-power power electronic equipment. The main function of the high-power four-quadrant rectifier is to convert the input single-phase or three-phase AC voltage into a DC voltage output to supply power to electrical equipment. [0003] Taking locomotive power supply technology as an example, DC600V train power supply device, main converter and auxiliary converter are all commonly used train power supply devices. The power of the train power supply device and auxiliary converter is generally 400-600kW, and the power of the main converter is generally 120...

AI Technical Summary

Problems solved by technology

[0005] 1. Due to the energy consumption of the resistive load, during the test, not only all the energy is consumed on the resistive load, but also a cooling system is provided for the resistive load to solve the heat dissipation problem, resulting in serious waste of energy and increased test costs

[0006] 2. The capacity of the power grid is required to be large enough. For some small and medium-sized enterprises, it is impossible to carry out a full-load test on the equipment under the condition of limited power grid capacity.

[0007] 3. A high-power transformer is required as an AC voltage converter. Taking the DC600 V train power supply device test system as an example, a power frequency 600kW transformer is required. The transformer is large in size and high in cost, resulting in a large test system. Large floor area and high investment cost of test equipment

[0008] 4. For single-phase input high-power four-quadrant rectifiers, when using one phase of the three-phase power supply to power the high-power four-quadrant rectifiers, it will cause unbalanced three-phase output, tripping the power supply system, and the test cannot be carried out

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