Power electronic transformer power module testing system
A power module and test system technology, which is applied in the direction of high-efficiency power electronic conversion, regulation of electric variables, measurement of electric variables, etc., can solve the problems of complex control and high cost, and achieve the effect of simple control method
Active Publication Date: 2018-04-27
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI +1
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Problems solved by technology
[0006] The purpose of the present invention is to overcome the disadvantages of complex control and high cost of the existing three-phase power electronic transformer power module during testing, and propose a power module testing system
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[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0020] Such as figure 1 As shown, the test system of the present invention is composed of a three-phase uncontrollable rectifier bridge 1 and two power modules 4 and 5 to be tested. The input end of the three-phase uncontrollable rectifier bridge 1 is connected to an external three-phase AC power supply, and the output end of the three-phase uncontrollable rectifier bridge 1 is respectively connected to two parallel-connected power modules 4 and 5 to be tested. Dual active bridge series resonant DC-DC The secondary side DC energy storage capacitor C of converter 2 L connected; the two power modules 4 and 5 to be tested pass through the filter inductor L g2 in parallel.
[0021] Wherein, each power module to be tested is composed of a dual active bridge series resonant DC-DC converter 2 and an H bridge unit 3 . The DC output terminals of H-b...
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The invention discloses a power electronic transformer power module testing system, which comprises a three-phase uncontrollable rectifier bridge and two power electronic transformer power modules tobe tested. Each power module consists of an H-bridge unit and a dual-active-bridge series resonance type DC-DC converter. The two power electronic transformer power modules to be tested are connectedin parallel via a filtering inductor. The flow of active power is controlled through open-loop control of a phase angle difference between modulation strategies of the two power modules, so that the tested power modules operate at set current and voltage, and the steady-state operating conditions are tested. The power electronic transformer power module testing system can simulate the operating conditions of a real three-phase cascaded H-bridge power electronic transformer power module, and provides convenience for the circuit parameter design of the real system power module.
Description
technical field [0001] The invention relates to a power electronic transformer power module testing device. Background technique [0002] The future smart grid requires intelligent electrical equipment and superior electrical performance, such as high power supply quality, easy access to renewable energy generation, etc. The distribution network is an important part of the power grid. In the distribution network, the distribution transformer is the most widely used The most common type of equipment, the annual output of distribution transformers in my country accounts for about 1 / 3 of the annual output of all transformers. Therefore, the performance of the distribution transformer is related to the performance of the future smart grid, and the traditional transformer is far from meeting the high power supply quality and intelligent requirements of the future smart grid. [0003] Power electronic transformers are also called solid-state transformers or energy routers. Compare...
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Login to View More IPC IPC(8): G01R31/00H02M3/335
CPCG01R31/00H02M3/33576Y02B70/10
Inventor 李耀华张航高范强王平黄仁乐付军美王存平
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI