DC transformer topology for unipolar-to-true bipolar transformation

A DC transformer and pole conversion technology, applied in the direction of DC power input conversion to DC power output, instruments, adjusting electrical variables, etc., can solve problems such as load unbalance, voltage unbalance, etc., to reduce construction costs and reduce system The effect of design power

Inactive Publication Date: 2019-07-09
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Based on the requirements of the DC transmission and distribution network, the present invention proposes a DC transformer topology suitable for application scenarios whe

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  • DC transformer topology for unipolar-to-true bipolar transformation
  • DC transformer topology for unipolar-to-true bipolar transformation
  • DC transformer topology for unipolar-to-true bipolar transformation

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Embodiment Construction

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. Unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be interpreted in a broad sense, for exa...

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Abstract

The invention discloses a DC transformer topology for unipolar-to-true bipolar transformation, which is a DC transformer topology suitable for an application scenario in which the input side is unipolar and the output side is truly bipolar. In the process of unipolar-to-true bipolar transformation, the main problem is that load imbalance often occurs on the true bipolar side. Under such condition,imbalance of the output voltage can be easily caused, and the stable operation of the system will be affected. A DC transformer and power balance topology for unipolar-to-true bipolar transformationpresented by the invention is used to solve the problem of DC/DC voltage transformation under load imbalance. The design scheme is as follows: a power balance system is designed between the positive and negative poles of output, so that the unbalanced power is transmitted through the system and the voltage between the two poles can be balanced. The scheme can reduce the capacity design demand of the system and the construction cost of the system under the above scenario.

Description

technical field [0001] The invention belongs to the technical field of medium-voltage and high-power DC transformers, and in particular relates to a DC transformer topology used for unipolar-to-true bipolar conversion. Background technique [0002] In the past fifteen years, research on DC power grids has entered the fast lane worldwide. Since the DC distribution network involves multiple functions such as new energy grid connection, multi-level transmission network integration, and power distribution, its application scenarios are the most diverse and complex in the DC network. As the core equipment in the DC transmission and distribution network, the DC transformer undertakes the functions of voltage level conversion, power transmission, and fault isolation. Therefore, the multi-scenario adaptability of the DC transformer is also one of the core research points. [0003] An application scenario where the input side is unipolar and the output side is true bipolar is one o...

Claims

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Application Information

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IPC IPC(8): H02M3/335
CPCH02M3/33584H02M1/007
Inventor 卓放史书怀程盛王丰杨景刚刘洋
Owner XI AN JIAOTONG UNIV
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