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Three-phase load unbalance control method for low-voltage transformer area

A technology for unbalanced load and low-voltage station area, applied in the direction of eliminating/reducing asymmetry in multi-phase networks, reducing asymmetry in multi-phase networks, etc. Equal adjustment problem to achieve the effect of solving uneven load distribution

Pending Publication Date: 2022-04-22
XIAMEN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing method is to balance the three-phase load at the low-voltage outlet of the distribution transformer by outputting compensation current, and the fundamental problem of the three-phase unbalanced phenomenon lies in the uneven distribution of the three-phase load, so this method cannot solve the three-phase imbalance at the root. Balanced load uneven distribution problem
In addition, the existing scheme considers the installation quantity and position of the commutation switch and the commutation adjustment strategy separately, and there is a lack of cooperation between the three, which cannot better achieve the purpose of phase modulation

Method used

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  • Three-phase load unbalance control method for low-voltage transformer area
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  • Three-phase load unbalance control method for low-voltage transformer area

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Embodiment Construction

[0037] To further illustrate the various embodiments, the present invention is provided with accompanying drawings. These drawings are a part of the disclosure of the present invention, which are mainly used to illustrate the embodiments, and can be combined with related descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should understand other possible implementations and advantages of the present invention. Components in the figures are not drawn to scale, and similar component symbols are generally used to denote similar components.

[0038] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments.

[0039] The present invention proposes a specific implementation of a three-phase load unbalance control method in a low-voltage station area, including the following process:

[0040] (1) Based on the similarity, desig...

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Abstract

The invention discloses a low-voltage transformer area three-phase load imbalance control method, which comprises the following steps of: setting the number and installation positions of phase-change switches of a low-voltage transformer area based on similarity, design load and real-time load; and when the low-voltage transformer area runs, periodically executing a three-phase load imbalance commutation strategy. According to the three-phase load imbalance control method for the low-voltage transformer area, the similarity, the design load and the real-time load are comprehensively considered, the actual load can be randomly increased for resident electric power and overload of a distribution line, transformer area optimization can be carried out, correction is carried out through a real-time commutation strategy, and the reliability of the transformer area is improved. And the problem of uneven load distribution caused by three-phase imbalance can be effectively solved.

Description

technical field [0001] The invention relates to the field of unbalanced control of three-phase loads in a power grid, in particular to a method for unbalanced control of three-phase loads in a low-voltage station area. Background technique [0002] In order to maintain the stable operation of the three-phase AC power system, three-phase load balance is one of the key indicators. The electricity load in the low-voltage station area is generally single-phase connected, and there are a large number of situations that are not properly planned, resulting in disorder in the number of connected users and phase sequence, that is, the number of users connected to the three-phase and the load are unbalanced, and the operation When the three-phase actual load is unbalanced. [0003] In the existing methods of controlling three-phase unbalance, due to the diversity of methods, the installed equipment will also change accordingly, so the investment in compensation devices will not only ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/26
CPCH02J3/26Y02E40/50
Inventor 杨永宽吕志盛陈佳荣林仲华
Owner XIAMEN UNIV OF TECH
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