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Distributed active filter

A source filter, distributed technology, applied in harmonic reduction devices, AC networks to reduce harmonics/ripples, etc., can solve the problems of large area occupation and high investment costs, achieve less workload, convenient installation and debugging, cost-effective effect

Inactive Publication Date: 2010-12-22
上海浦元自动化科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the performance of the active filter is good, but each line is equipped with one, which occupies a large area and has high investment costs

Method used

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Embodiment

[0024] The distributed active filter adopts the principle of centralized sampling and branch control to sample each circuit that needs harmonic compensation, and calculate the harmonic spectrum and harmonic value of each line. According to the calculation results, the harmonic spectrum and amplitude to be compensated for each line are obtained, and the CPU performs rapid judgment and calculation according to the calculation of the accurate compensation model and guides the IGBT circuits of each line to generate the required harmonic compensation components. For each line Compensation is performed separately to achieve the purpose of eliminating harmonic interference.

[0025] The characteristics of the distributed active filter are as follows:

[0026] 1. Conduct current sampling for each line that needs to compensate for harmonics, so as to accurately obtain the harmonic spectrum and amplitude of each line, and directly and accurately reflect the status of each line.

[0027...

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Abstract

The invention relates to a distributed active filter which comprises a sampling module, a CPU processing module, an IGBT compensation circuit and a monitoring system, wherein the sampling module is connected with the CPU processing module; the CPU processing module is connected with the IGBT compensation circuit; and the monitoring system is connected with the CPU processing module. Compared with the prior art, the invention has the advantages of flexible and accurate configuration, high reliability, high cost performance, convenient installation and debugging and the like, and has harmonic interference which can simultaneously compensate several lines.

Description

technical field [0001] The invention relates to an active filter, in particular to a distributed active filter. Background technique [0002] With the development of industry, various new electrical products with different purposes have been widely used. Some of these products generate large harmonics that pollute the electrical system. These include frequency conversion devices, thyristor rectifiers, electric arc furnaces, various household appliances, etc. Harmonic interference causes heating of various electrical components, increases line loss, interferes with communication lines, and affects the normal operation of electrical equipment. For this reason, in the case of severe harmonic interference, it is often necessary to configure a harmonic filter device. The active filter can track the generation of harmonics in real time and eliminate them, and has been widely used. Although the performance of the active filter is good, but each line is equipped with one, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01
CPCY02E40/40
Inventor 徐瑞新陈平王龙刘高王庆
Owner 上海浦元自动化科技有限公司
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