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Harmonic detection method and relevant device

A harmonic detection and harmonic technology, applied in the field of electronics, can solve problems such as difficult to balance storage space and calculation time, achieve the effect of comprehensive optimization of storage unit quantity and calculation time, save code space, and save calculation time

Active Publication Date: 2014-01-29
SHENZHEN INVT ELECTRIC
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  • Abstract
  • Description
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Problems solved by technology

Existing harmonic detection technology is difficult to balance storage space and computing time

Method used

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  • Harmonic detection method and relevant device
  • Harmonic detection method and relevant device
  • Harmonic detection method and relevant device

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Embodiment Construction

[0051] Embodiments of the present invention provide a harmonic detection method and a related device, in the hope that the harmonic detection can take into account storage space and calculation time.

[0052] In the following, specific examples will be used to describe in detail respectively.

[0053] In order to make the purpose, features and advantages of the present invention more obvious and understandable, 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 following 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.

[0054] The terms "first", "second", "third"...

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Abstract

A harmonic detection method and a relevant device. A harmonic detection method comprises: sampling an electrical signal from a power line to obtain an N-point electrical signal sequence; performing N-point real fast Fourier transform (RFFT) computation on the N-point electrical signal sequence to obtain a first complex sequence; performing harmonic extraction processing on the first complex sequence to obtain a second complex sequence; performing virtual-real combination processing on the second complex sequence to obtain a third complex sequence; performing RFFT computation on the third complex sequence to obtain a fourth complex sequence; and performing virtual-real combination processing on the fourth complex sequence to obtain an N-point harmonic sequence. The harmonic detection method and relevant device are favourable to taking both storage space and computation time into account during harmonic detection.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a harmonic detection method and related devices. Background technique [0002] At present, various power electronic devices and nonlinear loads are widely used in the power system, resulting in a large number of harmonics. Harmonics will not only pose a threat to the safe operation of the power system itself, but may also bring great impact and harm to the surrounding electrical environment. [0003] Active Power Filter (APF, Active Power Filter) is a power electronic device used to dynamically suppress harmonics and compensate reactive power. Static Var Generator (SVG, Static Var Generator) is one of the main devices in Flexible AC Transmission System (FACTS, Flexible AC Transmission System). APF can compensate the harmonics and reactive power that change in size and frequency, and the detection of harmonic signals by APF is the key to ensure its compensation performance. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A99Z99/00
CPCG01R23/16G01R23/00G01R19/2513
Inventor 刘海威
Owner SHENZHEN INVT ELECTRIC
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