Resonance-type power electronic current transformer and current transformer device

A technology of power electronics and converters, which is applied in the direction of high-efficiency power electronics conversion, adjustment of electric variables, and output power conversion devices, etc. It can solve the problems of unable to meet the new needs of the power system, large volume of industrial frequency transformers, and low reliability. , achieve high-efficiency energy transfer and intelligent control, wide output voltage range, and reduce switching loss
CN103441691AActive Publication Date: 2013-12-11ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2013-12-11

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Abstract

The invention relates to the technical field of power electronic current transformers, and provides a resonance-type power electronic current transformer and a current transformer device. The current transformer comprises an input-stage rectifying circuit and a rear-stage DC / DC circuit. The input-stage rectifying circuit comprises three bridge arms. Each bridge arm is composed of an upper half bridge arm body and a lower half bridge arm body. The midpoints of the bridge arms are connected with three phases of a high-voltage alternating-current power grid respectively. Each half bridge arm body comprises n module units. Ports of the module units are connected in a head-to-tail mode to form a bridge arm structure. Due to the high-frequency isolation of the input side and the output side, a heavy lower-frequency transformer is removed, and meanwhile efficient energy transmission and intelligent control are achieved. Harmonic wave transmission between different power grids and mutual influences caused by failures of the different power grids can be intercepted, meanwhile, the range of the output voltage is wide, continuous adjustment of the current and the voltage can be achieved, system operation information of the current transformer is easy and convenient to collect, mutual communication can be achieved among a plurality of current transformer systems, and the intelligent power grid is obtained.
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Description

technical field

[0001] The invention relates to the technical field of power electronic converters, in particular to a power electronic converter system capable of realizing high efficiency, high-frequency isolation, high-voltage input, wide-range stable voltage output, and bidirectional energy flow. Background technique

[0002] With the increasingly serious ecological environment problems and the depletion of traditional energy sources, energy-saving technologies and efficient use of new energy sources are receiving attention and support from all over the world. Undoubtedly, as an important application aspect of energy-saving technology, smart grid has become a research hotspot in industry and academia. Distributed power generation is an important way to utilize new energy. The combination of distributed power generation and smart grid has become an inevitable trend of the future grid.

[0003] The traditional new energy distributed power generation system realizes the e...

Claims

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