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Power electronic type distributed three-phase imbalance treatment method

A power electronics and distributed technology, which is applied in the direction of reducing the asymmetry of the multi-phase network and eliminating/reducing the asymmetry of the multi-phase network. , The effect of alleviating the low voltage phenomenon

Active Publication Date: 2020-08-28
QINGDAO TOPSCOMM COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if each AUC is compensated locally, it will cause the output of multiple devices to cancel each other at a certain node, resulting in waste of equipment output and excessive line loss

Method used

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  • Power electronic type distributed three-phase imbalance treatment method
  • Power electronic type distributed three-phase imbalance treatment method
  • Power electronic type distributed three-phase imbalance treatment method

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Experimental program
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Embodiment Construction

[0029] The core of the present invention is to provide a power electronic distributed three-phase unbalance control method, which installs distributed AUC at the branch of the low-voltage distribution line for unbalance control, balances the current of the branch line, and reduces the loss of the low-voltage distribution line , and effectively control the terminal low voltage phenomenon.

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0031] figure 1 For the schematic diagram of the applicatio...

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Abstract

The invention discloses a power electronic type distributed three-phase imbalance treatment method, which comprises the steps of carrying out topology construction and use analysis on a low-voltage distribution area; reasonably installing distributed AUC, wherein each AUC carries out imbalance detection on the respective branch and carries out mutual communication at a host or each equipment so asto perform overall imbalance analysis on the transformer area; calculating the projection size of each branch imbalance component in the overall imbalance direction by combining with the detection components of each equipment and the total unbalance amount; carrying out imbalance treatment on the selected branch with the projection in the positive direction; and calculating the compensation proportion required by each branch. According to the invention, the performance of small output of each equipment and more line loss reduction can be realized on the premise of meeting the total network side balance.

Description

technical field [0001] The invention relates to the field of power system power quality, in particular to a power type distributed three-phase imbalance control method. Background technique [0002] There are many users in the public substation area, and its power distribution topology is very complex, with many and chaotic branches, and the power consumption of each user is very random, so the three-phase unbalance phenomenon in the public substation area is inevitable. The unbalanced three-phase line will generate neutral line current, and excessive neutral line current will increase line loss, and generate neutral line heating, which will affect line safety. For the rural power grid area, due to the complicated wiring, it is easy for a certain branch line to be too long, coupled with current imbalance and other reasons, it will cause low voltage at the end of the line, which will affect the normal operation of the user's electrical equipment. At the same time, the State ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/26
CPCH02J3/26Y02E40/50
Inventor 张鹏程郭志强卢松林宁振
Owner QINGDAO TOPSCOMM COMM