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Unbalanced source positioning method, system and device

A source positioning and balancing technology, applied in the field of power system, can solve the problems of less unbalanced sources, unfavorable economic operation of power system, and lower efficiency of electrical equipment, etc., to achieve the effect of fast positioning speed

Active Publication Date: 2019-08-23
GUANGDONG POWER GRID CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the power system is in a three-phase unbalanced operation state, the unbalanced voltage and current at the common connection point on the upstream and downstream sides will cause a series of adverse effects on the power equipment, such as causing increased heat generation of the electrical equipment and reducing the efficiency of the electrical equipment; shortening The service life of electrical equipment is not conducive to the economic operation of the power system and other issues
At present, there are relatively few studies on the location of unbalanced sources, which makes it impossible for staff to clarify the responsibilities of the upstream unbalanced source and the downstream unbalanced source for the contribution of the voltage unbalance at the common connection point. take reasonable measures

Method used

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  • Unbalanced source positioning method, system and device
  • Unbalanced source positioning method, system and device
  • Unbalanced source positioning method, system and device

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Embodiment Construction

[0054] The core of this application is to provide a method, system and device for locating unbalanced sources, which can quickly locate the dominant unbalanced source, so that the staff can take corresponding measures for the dominant unbalanced source in time.

[0055] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0056] Please refer to figure 1 , figure 1 A flow chart of steps for an unbalanced sour...

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Abstract

The invention discloses an unbalanced source positioning method, system and device. The method comprises the following steps of establishing a negative-sequence Norton equivalent circuit diagram for unbalanced source positioning at a common connection point; acquiring three-phase imbalanced data generated by an upstream side unbalanced load and a downstream side unbalanced load at the common connection point; separating the upstream side impedance and the downstream side impedance in the three-phase imbalanced data through a negative entropy-based Fast ICA algorithm; calculating, according tothe upstream side impedance and the downstream side impedance, an upstream side unbalanced voltage of the upstream side unbalanced load at the common connection point and a downstream side unbalancedvoltage of the downstream side load at the common connection point; and determining the position of a dominant unbalanced source by using the upstream side unbalanced voltage and the downstream side unbalanced voltage. The unbalanced source positioning method provided by the invention can quickly position the dominant unbalanced source, so that staff can take appropriate measures in time for the dominant unbalanced source.

Description

technical field [0001] The present application relates to the field of power systems, in particular to a method, system and device for locating unbalanced sources. Background technique [0002] After the promulgation of the technical standard report IEC / TR 61000-3-13-2008 on the installation of unbalanced loads in the power system, the three-phase imbalance in the power system has attracted the attention of the power sector. When the power system is in a three-phase unbalanced operation state, the unbalanced voltage and current at the common connection point on the upstream and downstream sides will cause a series of adverse effects on the power equipment, such as causing increased heat generation of the electrical equipment and reducing the efficiency of the electrical equipment; shortening The service life of electrical equipment is not conducive to the economic operation of the power system and other issues. At present, there are relatively few studies on the location of...

Claims

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/088
Inventor 钟振鑫赵江帅林笑玫温慧玲杨万青刘奇聪潘珏陈文珍黄丽贞陈小儿王雅琴刘敏
Owner GUANGDONG POWER GRID CO LTD
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