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A Power Electronic Transformer for Smart Microgrid with Redundant Function

An intelligent micro-grid and power electronics technology, applied in the output power conversion device, the conversion of AC power input to AC power output, electrical components, etc., can solve the problems of three-pole power electronic transformers that cannot work normally and have high operating risks. , to achieve the effect of increasing capacity, simple circuit structure, and improving input voltage level and power level

Active Publication Date: 2020-11-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, there is only one transformer in this structure. When the transformer in the circuit is damaged, the entire three-pole power electronic transformer cannot work normally, and the operation risk is high.

Method used

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  • A Power Electronic Transformer for Smart Microgrid with Redundant Function
  • A Power Electronic Transformer for Smart Microgrid with Redundant Function
  • A Power Electronic Transformer for Smart Microgrid with Redundant Function

Examples

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] refer to image 3, an overall schematic diagram of a power electronic transformer for smart microgrid with redundant functions, including several cascaded redundant unit modules, wherein the redundant unit modules can be one or more, and the number of cascaded modules is selected according to the voltage level, The cascade connection of multiple modules can increase the capacity level of the transformer; the specific connection method is: the input power frequency high-voltage AC power is converted into DC power through the H-bridge rectifier, and the output voltage of the H-bridge rectifier is used as the input voltage of the redundant unit module, and then connected to into the redundant unit module, and then output direct current through the redundant unit module, and the output end of the redundant unit module is connected to the i...

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Abstract

The invention discloses an intelligent microgrid power electronic transformer with a redundancy function, comprising a plurality of cascaded rectifiers, wherein the output ends of each rectifier are respectively connected to the input ends of different redundant unit modules, and the output ends of each redundant unit module are respectively connected to different inverter input ends, wherein allredundant unit modules are cascaded; the redundancy unit module comprises two high frequency transformers T1 and T2 connected in parallel. When the primary side of the high frequency transformer T1 orT2 is damaged, the secondary side of the other high frequency transformer will not be affected. The other high frequency transformer can continue to work, has redundancy function and does not affectthe normal operation of the circuit.

Description

technical field [0001] The invention belongs to the technical field of power electronic transformers, and in particular relates to a power electronic transformer with redundant functions for an intelligent microgrid. Background technique [0002] Power electronic transformer is a new type of intelligent micro-grid distribution transformer device that has attracted people's attention with the development of power electronic technology in recent years. In addition to the functions of conventional transformers such as voltage transformation, isolation, and energy transfer, power electronic transformers also have functions such as grid interconnection and new energy grid integration. At present, power electronic transformers can be divided into two categories according to whether there is a DC-DC conversion link in the middle: AC-AC type power electronic transformer without DC-DC conversion link and AC-DC-AC type with DC-DC conversion link Power electronic transformer, principl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M5/458H02M1/12
CPCH02M1/126H02M5/4585
Inventor 石勇惠济桂旭伟王鑫韩从宇
Owner SHAANXI UNIV OF SCI & TECH
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