Voltage dip disturbance source identification method based on voltage space vector

A technology of voltage space vector and voltage sag, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., to achieve the effects of less variables, easy engineering implementation, and high-quality power supply

Inactive Publication Date: 2015-09-23
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0002] At present, the existing identification method of voltage sag disturbance sources considers the three-phase voltage as three variable analysis, and there is still a big gap with the ideal automatic analysis sag analysis method. The present invention proposes a method based on voltage space vector Identification Method of Voltage Sag Disturbance Source

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  • Voltage dip disturbance source identification method based on voltage space vector
  • Voltage dip disturbance source identification method based on voltage space vector
  • Voltage dip disturbance source identification method based on voltage space vector

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[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

[0038] In the embodiment of the present invention, please refer to figure 1 , the Clark transform transforms the three-phase instantaneous variables into a two-dimensional stationary orthogonal αβ coordinate system:

[0039] (1)

[0040] Represented in vector form:

[0041] (2)

[0042] (3)

[0043] in, is the voltage space vector, x 0 (t) For the zero-sequence component, the coefficient 2 / 3 keeps the magnitude of the two transfo...

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Abstract

The invention discloses a voltage dip disturbance source identification method based on a voltage space vector; the method comprises the following steps: converting three-phase voltage into one-dimension time variant complex variable; using DFT to form amplitudes, harmonic waves and phase angle characteristic quantity so as to detect and represent the voltage dip, and identify the disturbance source causing the dip; using three dimensional visualization description of the space vector to specifically represent the whole voltage dip. The method uses less variables in each phase analysis, is small in calculation, easy to realize in engineer, can deeply and systematically analyze and study the voltage dip problems, can further control and manage the voltage dip, thus ensuring qualified power supply for users, improving power quality, and promoting intelligent power grid development, so important reality meaning can be provided.

Description

technical field [0001] The invention relates to a voltage sag disturbance source identification method, in particular to a voltage sag disturbance source identification method based on a voltage space vector. Background technique [0002] At present, the existing identification method of voltage sag disturbance sources considers the three-phase voltage as three variable analysis, and there is still a big gap with the ideal automatic analysis sag analysis method. The present invention proposes a method based on voltage space vector Identification method of voltage sag disturbance source. Contents of the invention [0003] The purpose of the present invention is to provide a voltage sag disturbance source identification method based on a voltage space vector, so as to solve the problems raised in the above-mentioned background technology. [0004] To achieve the above object, the present invention provides the following technical solutions: [0005] A voltage sag distu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G06F19/00
Inventor 李滨张建华李岩林贺敬波李阳武楠黄宜军王浩马飞崔富城赵飞
Owner STATE GRID CORP OF CHINA
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