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Low-voltage power line power grid frequency collection device and frequency measurement algorithm

A low-voltage power line and grid frequency technology, applied in the field of grid frequency collection, can solve problems such as multipath interference and complex noise, and achieve the effects of low cost, accurate signal acquisition, and improved rapidity and accuracy

Inactive Publication Date: 2016-07-13
NANJING INST OF TECH
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Problems solved by technology

[0002] At present, the environment of my country's low-voltage power grid is relatively complex, there are serious multipath interference and complex noise, and there are few technologies in the society that detect the frequency of power grids on power lines with high accuracy and speed

Method used

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  • Low-voltage power line power grid frequency collection device and frequency measurement algorithm
  • Low-voltage power line power grid frequency collection device and frequency measurement algorithm
  • Low-voltage power line power grid frequency collection device and frequency measurement algorithm

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Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments, wherein the schematic embodiments and descriptions are only used to explain the present invention, but are not intended to limit the present invention.

[0036] Such as Figure 1-6 As shown, a low-voltage power line grid frequency acquisition device includes a control center, a power management module, a precision voltage transformer module, a signal conditioning module, and an anti-aliasing filter module. The precision voltage transformer module is used to couple AC signals on the low-voltage power line , Raise the DC bias through the signal conditioning module, enter the anti-aliasing filter circuit, filter out most of the harmonic interference signals through the anti-aliasing filter module, and then enter the ADC circuit, convert the analog signal into a digital signal through the ADC circuit, and convert the The collected data is converted...

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Abstract

The invention relates to a low-voltage power line power grid frequency collection device and a frequency measurement algorithm. The collection device comprises a control center, a power supply management module, a precise voltage transformer module, a signal conditioning module and an anti-aliasing filtering module. The precise voltage transformer module is used for coupling alternating current signals on a low-voltage power line, the direct current bias is improved by the signal conditioning module, the coupled alternating current signals enter the anti-aliasing filtering module and then enter an ADC circuit after the anti-aliasing filtering module filters out most harmonic interference signals, the ADC circuit converts analog signals into digital signals, the collected data is converted by the ADC circuit and is used to calculate the frequency in a power grid by means of the frequency measurement algorithm, and the measured data is transmitted to a PC upper computer and is stored into a database. According to the invention, the power network frequency parameter can be precisely and rapidly detected, the operation condition of the power grid is accurately estimated, the electric power system is enabled to operate under a safe and stable environment, and the ordered electric power production life is ensured.

Description

【Technical field】 [0001] The invention relates to a low-voltage power line grid frequency acquisition device and a frequency measurement algorithm, belonging to the technical field of grid frequency acquisition. 【Background technique】 [0002] At present, the environment of my country's low-voltage power grid is relatively complex, with serious multipath interference and complex noise, and there are few technologies in the society that can detect the frequency of power grids on power lines with high accuracy and speed. Therefore, the development of a high-precision and fast-speed power grid frequency measurement device can understand the operation of the power grid in real time, understand the use status of each electrical appliance in the power grid, ensure the safe and stable operation of the power grid, and ensure the normal operation of power production. 【Content of invention】 [0003] The purpose of the present invention is to provide a low-voltage power line power gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/02
CPCG01R23/02
Inventor 姜海涛严晓杰李志伟姜程程卢双兰风
Owner NANJING INST OF TECH
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