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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 the problems of reducing system stability, voltage support, etc., and achieve the effect of easy use and understanding, and convenient normalized management

Active Publication Date: 2020-12-22
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 in conjunction with 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 pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0069]Such asFigure 3 to Figure 23 As shown, a virtual transformer operation control method 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, the following isimage 3 The three-stage virtual transformer topology is shown as an example to illustrate the spe...

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Abstract

The invention provides an operation control method of a virtual transformer. The operation control method comprises the following steps: a medium-voltage alternating-current input stage control step:controlling an input stage rectifier by adopting dq decoupling, respectively controlling active current and reactive current by adopting a current inner loop, and connecting a voltage outer loop witha direct-current side capacitor voltage and the active current; an isolation transformation stage control step: adopting single phase shift to control an isolation transformation stage; and an inverter control step: controlling the inverter by adopting a voltage outer loop and a current inner loop. According to the invention, the functions of equal-proportion conversion and phase synchronization of input / output alternating current amplitudes can be realized; by establishing an inter-network voltage relationship, voltage support can be provided for each other between networks, and normalizationmanagement is facilitated; a plug-and-play alternating current port can be provided, and extra port voltage detection is not needed; the external characteristics of the alternating current side are the same as those of a transformer, and engineering personnel can use and understand conveniently.

Description

Technical field[0001]The invention relates to the field of power distribution, and in particular to a method for controlling the operation of a virtual transformer.Background technique[0002]At present, the distribution network is developing towards intelligence and versatility. The distribution transformer is one of the main electrical equipment for voltage transformation and power transmission. It has the advantages of low cost and high reliability. However, traditional distribution transformers have large no-load losses, large volume and weight, do not have the function of fault isolation, 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 needs. Therefore, the new generation of intelligent distribution network requires new intelligent and integrated electrical equipment based on power electronic technology.[0003]With the concept of energy Internet ...

Claims

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Application Information

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Patent Type & Authority Applications(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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