Self-balanced electronic power transformer
A power electronics and self-balancing technology, applied in the field of power transmission and transformation devices, can solve the problems of affecting the safe and stable operation of the power system, affecting the secondary side power supply, and unfavorable operation of the transformer, so as to improve power quality, flexible transformation, and fast voltage. Effect
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example 1
[0026] Example 1: 10kV / 400V three-phase self-balancing power electronic transformer
[0027] It consists of three power electronic transformer units that change from one phase to three phases. The high-voltage side adopts star connection, and the low-voltage side adopts star connection with center outlet. The high-voltage stage of each one-phase-change three-phase power electronic transformer unit is 7 AC / DC / AC modules cascaded, the device rated voltage is 3300V, the isolation stage is 7-input 3-output intermediate frequency transformer, and the low-voltage stage is three sets of AC / DC / AC converter, the rated voltage of the device is 1200V. The corresponding low-voltage stages of the three one-phase-change three-phase power electronic transformer units are connected in parallel to form the three-phase output of the self-balancing power electronic transformer.
example 2
[0028] Example 2: 10kV / 220V three-phase to one-phase self-balancing power electronic transformer
[0029] Consists of three single-phase power electronic transformer units. The high-voltage side adopts star connection, and the high-voltage stage of each single-phase power electronic transformer is cascaded with 7 AC / DC / AC modules, the rated voltage of the device is 3300V, the isolation stage is 7-input 1-output intermediate frequency transformer, and the low-voltage stage is 1 group AC / DC / AC converter, the rated voltage of the device is 1200V. The low-voltage stages of three single-phase power electronic transformers are connected in parallel to form the output of the self-balancing power electronic transformer.
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