A New Three-Input/Output Characteristics-Varying Filter in the D-Module for Direct Processing of Three-Phase Signals

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  • 三相信号直接処理のための3入出力可変特性D因子フィルタの提案
  • 3ソウ シンゴウ チョクセツ ショリ ノ タメ ノ 3 ニュウシュツリョク カヘン トクセイ D インシ フィルタ ノ テイアン

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Abstract

This paper proposes a new three-input and three-output characteristics-varying filter in the D-module for direct processing of three-phase signals, which are becoming indispensable for effective active-compensations in three-phase power systems such as harmonics current, negative phase current, reactive power and varying voltage compensations. The filter in the D-module can make distinction between positive and negative frequencies of three-phase signals and can allow direct processing of the signals based on frequency polarity. The filter in the D-module can also change dynamically its filtering characteristics by simply injecting a shift-signal to itself These filtering effects are obtained in a very simple manner using the D-module. A new unified analysis of attractive general characteristics of the proposed filter in the D-module is given for its easy designs and realizations as well. Effectiveness of the analysis and usefulness of the filter in the D-module are newly examined and confirmed through experiments. The newly proposed filter in the D-module has potential to a variety of three-phase signal filtering applications.

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