Anti-interference current and voltage acquisition method for power system

A collection method, current and voltage technology, applied in the field of power system anti-interference current and voltage collection, can solve problems such as threats to system stability, device malfunction, poor anti-interference ability, etc.

Pending Publication Date: 2021-10-01
国网江苏省电力有限公司淮安供电分公司 +2
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are many methods for collecting voltage and current, and they are generally composed of voltage and current transformers and AD sampling chips. The accuracy can meet the requirements, but the anti-interference ability is poor. When the voltage and current fluctuate, it may cause device malfunction and threaten the entire system. system stability

Method used

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  • Anti-interference current and voltage acquisition method for power system
  • Anti-interference current and voltage acquisition method for power system
  • Anti-interference current and voltage acquisition method for power system

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Embodiment Construction

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other accompanying drawings based on these drawings and obtain other implementations.

[0021] Such as Figure 1-3 As shown, the voltage and current transformers (PT, CT) are input to the front-stage anti-jamming circuit, and the output of the anti-jamming circuit is used as the input of the first-stage filter circuit and input to the AD sampling chip. At this time, the hardware circuit ends; then the CPU adopts the Fourier Algorithm to collect the voltage and current data input by the AD sampling chip.

[0022] The first part of the anti-jamming circuit, such as f...

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Abstract

The invention discloses an anti-interference current and voltage acquisition method for a power system. The anti-interference current and voltage acquisition method adopts a voltage and current transformer used for converting external voltage and current into voltage output in the range of 0-3.53 V, and the output of the voltage and current transformer is connected with the input of an anti-interference circuit. The anti-interference current and voltage acquisition method comprises the steps that the voltage and current transformer inputs to the anti-interference circuit, the output of the anti-interference circuit serves as the input of a first-stage filter circuit and is input to an AD sampling chip, and then a CPU collects voltage and current data input by the AD sampling chip through adopting a Fourier algorithm. According to the anti-interference current and voltage acquisition method, the anti-interference capability is high, when the voltage and the current jitter, the maloperation of the device is not caused, and the stability of the whole system is ensured.

Description

technical field [0001] The invention belongs to the technical field of power electronic systems, and in particular relates to a method for collecting anti-interference current and voltage of a power system. Background technique [0002] Current and voltage are the most intuitive manifestation of the stability of the power system, and current and voltage acquisition is particularly important. At present, there are many methods for collecting voltage and current, and they are generally composed of voltage and current transformers and AD sampling chips. The accuracy can meet the requirements, but the anti-interference ability is poor. When the voltage and current fluctuate, it may cause device malfunction and threaten the entire system. System stability. Contents of the invention [0003] The present invention proposes an anti-interference current and voltage acquisition method for a power system, which has strong anti-interference ability, does not cause device malfunction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/25
CPCG01R19/25
Inventor 张琦兵李佑伟仇晨光徐晓春王栋余璟蔡康林史雪涛王涛任洁李浩汤同峰尹文琛
Owner 国网江苏省电力有限公司淮安供电分公司
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