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A Harmonic Source Location Method Based on Orthogonal Matching Pursuit Algorithm

A technology of orthogonal matching tracking and positioning method, which is applied in the direction of fault location, circuit device, and fault detection according to conductor type, etc. problem, to overcome the underdetermination of the measurement equation and reduce the investment cost

Active Publication Date: 2021-04-20
ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER +2
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Problems solved by technology

[0005] The harmonic source location method based on the equivalent circuit is simple in principle and easy to implement, but it is mainly aimed at the case of a single harmonic source, lacks integrity, and generally does not consider the time-varying nature of the power grid topology and branch parameters; the method based on harmonic state estimation The positioning results are relatively accurate, with overall observability, suitable for multi-harmonic source positioning, but more measurement data are required, the state quantity solution is more complicated, and the calculation amount is larger

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  • A Harmonic Source Location Method Based on Orthogonal Matching Pursuit Algorithm

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[0042] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0043] like figure 1 As shown, the harmonic source location method b...

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Abstract

The invention discloses a harmonic source positioning method based on an orthogonal matching tracking algorithm. The harmonic source positioning method is suitable for effective positioning of harmonic source positioning in an actual system, including steps: A. Establishing a measurement based on measurement information Equation; B. Estimation of node injection harmonic current based on orthogonal matching pursuit algorithm; C. Locating the main harmonic source based on the estimation result. The invention overcomes the problems of underdetermined measurement equations and non-global objectivity of the system caused by less configuration of existing measurement devices, and can accurately measure each node of the network under the condition of obtaining partial branch harmonic currents of the system network Estimating the injected harmonic current, effectively locating the harmonic source in the distribution network, reducing the investment cost, providing a basis for the division of harmonic responsibilities and harmonic governance, and improving the power quality of the power grid, reducing economic losses, and improving User satisfaction is of great significance.

Description

technical field [0001] The invention relates to the technical field of power quality analysis, in particular to a harmonic source location method based on an orthogonal matching pursuit algorithm. Background technique [0002] With the wide application of power electronic devices in all walks of life, harmonic pollution in the power grid is becoming more and more prominent. It is inevitable that a large amount of harmonic current will be injected into the power grid during the operation of power electronic devices, which will cause voltage and current distortion in the power grid and affect the safe and stable operation of the power grid and electrical equipment. In order to understand the harmonic pollution in the power grid in time, to achieve the purpose of distinguishing the harmonic responsibilities and effectively controlling the harmonics, it is very important to correctly identify the main harmonic sources in the power grid. [0003] Harmonic source location is the ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08H02J13/00
CPCG01R31/086H02J13/00
Inventor 王金浩张涛常潇雷达侯少建杨赟磊赵军张敏李胜文李慧蓬樊瑞刘翼肇徐永海张旭
Owner ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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