Hybrid distribution transformer decoupling magnetic integration device

Abstract

The invention discloses a hybrid distribution transformer decoupling magnetic integration device. The hybrid distribution transformer decoupling magnetic integration device comprises a pair of iron cores and three sets of windings wound on the pair of iron cores, wherein the iron cores are composed of iron yokes, branched magnetic iron cores and iron core limbs which correspond to the three sets of windings respectively; the three sets of windings comprise main transformer windings concentrically wound on the middle iron core limb, isolation transformer windings concentrically wound on the upper iron core limb and the lower iron core limb after being split, and series converter output filter inductors and parallel converter output filter inductors which are concentrically wound on the upper iron core limb, the lower iron core limb and the middle iron core limb. Separated magnetic pieces in a hybrid distribution transformer scheme are integrated on a pair of symmetric iron cores through an integrated design, so that the quantity of the separated magnetic pieces adopted in the hybrid distribution transformer is sufficiently decreased. In virtue of the symmetry of the iron core structures, the electromagnetic coupling among the windings is eliminated by adopting a method including winding splitting, magnetic flux reverse offsetting and provision of the branched magnetic iron cores, rich control functionality of an original hybrid distribution transformer is guaranteed, and the device has important practical values for realizing the integrated design of the hybrid distribution transformer.

Description

technical field [0001] The invention relates to a hybrid distribution transformer decoupling magnetic integration device, which belongs to the technical field of transformers. Background technique [0002] In recent years, the process of intelligent distribution network has been accelerating, and traditional distribution transformers have single functions and poor controllability, which can no longer meet the development needs of future distribution networks. For this reason, scholars such as Sandeep Bala of ABB Research Institute Co., Ltd. connected the back-to-back dual PWM converters to the three-winding distribution transformer to form a hybrid distribution transformer. An intelligent device that integrates multiple functions such as conversion, power transmission, stable power supply voltage, power flow control, harmonic current suppression, power factor correction, reactive power compensation, and asymmetry control. However, there are many discrete magnetic parts in t...

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Problems solved by technology

The use of many discrete magnetic parts often makes the overall structure of the system quite scattered, the volume and weight are quite large, the efficiency is low, the management and maintenance are very troublesome, and the overall electromagnetic capacity utilization rate of the iron core is low.

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