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Design and Research of Digital Low Pass Filter for Harmonic Detection

Bi Bo

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Abstract

Some principles of designing the digital low pass filter for harmonic detection are introduced,according to the basic theory of IIR filters and using direct form Ⅱ,a Butterworth digital low pass filter which is high precision and the high real-time is designed. The performance of the filter is analyzed,and the feasibility of the filter is proved.

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What this paper is about

Some principles of designing the digital low pass filter for harmonic detection are introduced,according to the basic theory of IIR filters and using direct form Ⅱ,a Butterworth digital low pass filter which is high precision and the high real-time is designed. The performance of the filter is analyzed,and the feasibility of the filter is proved.

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Available abstract

Some principles of designing the digital low pass filter for harmonic detection are introduced,according to the basic theory of IIR filters and using direct form Ⅱ,a Butterworth digital low pass filter which is high precision and the high real-time is designed. The performance of the filter is analyzed,and the feasibility of the filter is proved.

Key concepts: Butterworth filter, Low-pass filter, Filter design, Filter (signal processing), Digital filter, Harmonic, High-pass filter, Voltage-controlled filter

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