A power signal disturbance analysis method based on TLS-ESPRIT

A disturbance analysis and power signal technology, applied in the power field, can solve the problems of non-integer harmonic signals, and achieve the effect of accurate and effective algorithm, small calculation amount and simple implementation process.

Pending Publication Date: 2019-04-09
TRAINING CENT OF ANHUI ELECTRIC POWER +3
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Problems solved by technology

Also, in some environments, non-integer harmonic signals may appear in electrical loads

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  • A power signal disturbance analysis method based on TLS-ESPRIT
  • A power signal disturbance analysis method based on TLS-ESPRIT
  • A power signal disturbance analysis method based on TLS-ESPRIT

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Embodiment Construction

[0021] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, 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 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 creative efforts fall within the protection scope of the present invention.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower" and "horizontal" are based on the orientation or positional relationship shown in the drawings, and are only for It is convenient to describe the utility and simplify ...

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Abstract

The invention relates to the technical field of electric power, in particular to a power signal disturbance analysis method based on TLS-ESPRIT. The method includes: inter-harmonic detection, Simulation experiment, an actual data analysis and conclusion step. Harmonic inter-harmonic detection comprises construction of a signal mathematical model and subspace extraction, the subspace extraction interferes with a signal subspace through disturbance signals with the minimum norm, the influence of noise in the signal subspace is reduced, the subspace extraction can correct noise existing in the two subspaces at the same time, and the calculation accuracy is further improved; The simulation experiment comprises simulation signal calculation and matlab simulation environment simulation. The method combines the total least square method and the subspace rotation invariance to realize the detection of the power signal disturbance, and the simulation analysis proves that the algorithm is accurate and effective, the realization process is simple, and the calculation amount is small. The feasibility of the algorithm is proved through analysis of actual data, and the method has an applicationprospect in actual power signal interference processing.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method for analyzing disturbances of electric power signals based on TLS-ESPRIT. Background technique [0002] The normal voltage and current signals in the power system should be standard sine waves. However, due to various signal disturbances, it is difficult to maintain ideal voltage and current signals in the power supply system, which makes the current and voltage waveforms in the grid more distorted. The disturbed current and voltage signals mainly include two parts, the fundamental component and the harmonic component. The fundamental component refers to the sinusoidal signal with the same voltage frequency as the voltage frequency provided by the power system. Harmonic components are sinusoidal signals whose frequency is an integer multiple of the frequency of the voltage supplied by the power system. Also, in some environments, non-integer harmonic signals ma...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G01R31/00
CPCG01R31/00G06F30/20
Inventor 张红飞陈朔郭继刚王安迪
Owner TRAINING CENT OF ANHUI ELECTRIC POWER
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