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Method and device for detecting vector transformation of three-phase power phase sequence

A technology of vector transformation and three-phase electricity, which is applied in the field of vector transformation methods and devices for detecting the phase sequence of three-phase electricity, and can solve the problems of poor portability, unsuitability for simple applications, and poor versatility of phase sequence detection circuits.

Active Publication Date: 2014-12-17
ZHANGZHOU KEHUA TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, this method is only suitable for some complex occasions with CPU control, and is not suitable for some simple application occasions.
[0004] The phase sequence detection circuits mentioned above have poor versatility, and different methods cannot be used interchangeably through simple circuit changes, and the portability is poor.

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  • Method and device for detecting vector transformation of three-phase power phase sequence
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  • Method and device for detecting vector transformation of three-phase power phase sequence

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments and related drawings.

[0033] The invention provides a vector transformation method for detecting three-phase electric phase sequence, which is characterized in that: comprising the following steps:

[0034] S1: convert the input three-phase power into a low-voltage signal;

[0035] S2: Perform vector transformation and zero-crossing comparison on the low-voltage signal, and perform line-AND processing;

[0036] S3: Obtain an output signal after judging the line AND processed signal.

[0037] The present invention also provides a vector conversion device for detecting three-phase electrical phase sequence, which is characterized in that it includes a three-phase electrical input detection module, a phase vector conversion module, a signal acquisition and processing module and an ou...

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Abstract

The invention relates to a method for detecting vector transformation of a three-phase power phase sequence. The method is characterized by including the steps of S1, converting input three-phase electricity into a low-voltage signal; S2, subjecting the low-voltage signal to vector transformation, zero balancing and wired processing; S3, judging the signal subjected to wired processing and obtaining an output signal. The invention further provides a device for detecting vector transformation of the three-phase power phase sequence. The device which is a simple phase sequence detecting device has the advantages of simple circuit, convenience and reliability in control and strong expandability, and has a function of default phase detection.

Description

technical field [0001] The invention relates to the field of three-phase electric detection, in particular to a vector transformation method and device for detecting three-phase electric phase sequence. Background technique [0002] The traditional phase sequence detection circuit usually adopts the RC bridge method, the zero-crossing comparison combined with the CPU interrupt method, and the AD sampling combined with the CPU judgment method. Among them, the RC bridge method is the simplest, but this method is greatly affected by the voltage when detecting phase loss, and the parameters are generally difficult to adjust; the latter two methods are reliable in detection, but both require CPU to participate in the control and consume more CPU resources. It is not applicable to systems with no CPU participating in the control or with tight CPU resources. [0003] At present, the phase sequence detection circuit generally samples the grid voltage through the AD converter of the...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R29/18
Inventor 王志东陈四雄陈成辉苏先进
Owner ZHANGZHOU KEHUA TECH CO LTD