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Operation Control Method of Virtual Transformer

An operation control and transformer technology, applied in the field of virtual transformer operation control, can solve problems such as voltage support and reduce system stability, and achieve the effect of convenient use and understanding, and convenient normalized management

Active Publication Date: 2022-08-09
SHANGHAI JIAO TONG UNIV +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its low-voltage AC output control adopts a constant voltage and constant frequency strategy, and the low-voltage side cannot provide voltage support for other buses, which reduces the stability of the system

Method used

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  • Operation Control Method of Virtual Transformer
  • Operation Control Method of Virtual Transformer
  • Operation Control Method of Virtual Transformer

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Embodiment Construction

[0068] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the inventive concept. These all belong to the protection scope of the present invention.

[0069] like Figure 3 to Figure 23 As shown, an operation control method of a virtual transformer provided by the present invention is mainly a virtual transformer operation control strategy for a 10kV intelligent power distribution system. This scheme is a power electronic equipment operation control strategy based on the new concept of virtual transformer, without loss of generality. image 3 The three-stage virtual transformer topology shown is taken as an example to illustrate the specific technical implem...

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Abstract

The invention provides an operation control method of a virtual transformer, comprising the following steps: a medium voltage AC input stage control step: adopting dq decoupling to control the input stage rectifier, the current inner loop controls the active current and the reactive current respectively, and the voltage outer loop connects the DC side capacitor voltage and active current; isolation transformer stage control steps: use single phase shift to control the isolation transformer stage; inverter control steps: use voltage outer loop and current inner loop double loop to control the inverter. The invention can realize the proportional transformation of input / output alternating current amplitude and the functions of phase synchronization; by establishing the voltage relationship between the grids, the grids can provide voltage support to each other, and at the same time, it is convenient for normalized management; it can provide plug-and-play AC ports, There is no need to additionally detect the terminal voltage; the external characteristics of the AC side of the present invention are the same as those of the transformer, which is convenient for engineers to use and understand.

Description

technical field [0001] The invention relates to the field of power distribution, in particular, to an operation control method of a virtual transformer. Background technique [0002] At present, the distribution network is developing towards intelligence and multi-energy. Distribution transformer is one of the main electrical equipments to realize voltage transformation and power transmission. It has the advantages of low cost and high reliability. However, traditional distribution transformers have large no-load loss, large volume and weight, do not have fault isolation function, and cannot actively manage power quality problems. At the same time, distribution transformers cannot effectively manage a large number of distributed energy access and DC distribution demands. Therefore, the new generation of intelligent distribution network needs new intelligent and integrated electrical equipment based on power electronic technology. [0003] With the concept of energy intern...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/48H02J3/50
CPCH02J3/48H02J3/50Y02E60/60
Inventor 朱淼马建军陶乾陈阳段青沙广林赵彩虹马春艳徐莉婷潘爱强蔺海丽
Owner SHANGHAI JIAO TONG UNIV
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