A Fast Positive Sequence Components Extraction Method with Noise Immunity in Unbalanced Grids

Liwei Du; Mingxian Li; Zhen Tang; Liansong Xiong; Xun Ma; Guoxin Tang

doi:10.1109/TPEL.2019.2959672

A Fast Positive Sequence Components Extraction Method with Noise Immunity in Unbalanced Grids

Liwei Du
, Mingxian Li
, Zhen Tang
, Liansong Xiong
, Xun Ma
, Guoxin Tang

School of Electrical Engineering

Yunnan Normal University
China University of Mining and Technology
State Grid Corporation of China
Nanjing Institute of Technology

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

Fast and accurate acquisition of voltage components is the basic requirement for grid-tied inverters to realize various control under unbalanced grids. In view of this situation, a delay sampling period filter, which rapidly separates each voltage component by delaying two sampling periods in dq frame, is proposed in this article. In view of the noise interference, a delay operation period filter (DOPF) is proposed to scale the operation period and limit the noise to an acceptable range. The complete positive sequence components (PSC) extraction method based on the developed DOPF+ moving average filter (MAF) algorithm is presented, combing the advantages of DOPF and MAF for eliminating the double-frequency ac components and high-frequency noise, respectively. Finally, the feasibility and priority of the DOPF+MAF algorithm and PSC extraction method have been verified by the physical experimental results.

Original language	English
Article number	8932590
Pages (from-to)	6682-6685
Number of pages	4
Journal	IEEE Transactions on Power Electronics
Volume	35
Issue number	7
DOIs	https://doi.org/10.1109/TPEL.2019.2959672
State	Published - Jul 2020

Keywords

Delay operation period filter (DOPF) algorithm
noise immunity
positive sequence components (PSCs)
unbalanced grid

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10.1109/TPEL.2019.2959672

Cite this

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title = "A Fast Positive Sequence Components Extraction Method with Noise Immunity in Unbalanced Grids",

abstract = "Fast and accurate acquisition of voltage components is the basic requirement for grid-tied inverters to realize various control under unbalanced grids. In view of this situation, a delay sampling period filter, which rapidly separates each voltage component by delaying two sampling periods in dq frame, is proposed in this article. In view of the noise interference, a delay operation period filter (DOPF) is proposed to scale the operation period and limit the noise to an acceptable range. The complete positive sequence components (PSC) extraction method based on the developed DOPF+ moving average filter (MAF) algorithm is presented, combing the advantages of DOPF and MAF for eliminating the double-frequency ac components and high-frequency noise, respectively. Finally, the feasibility and priority of the DOPF+MAF algorithm and PSC extraction method have been verified by the physical experimental results.",

keywords = "Delay operation period filter (DOPF) algorithm, noise immunity, positive sequence components (PSCs), unbalanced grid",

author = "Liwei Du and Mingxian Li and Zhen Tang and Liansong Xiong and Xun Ma and Guoxin Tang",

note = "Publisher Copyright: {\textcopyright} 1986-2012 IEEE.",

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AU - Du, Liwei

AU - Li, Mingxian

AU - Tang, Zhen

AU - Xiong, Liansong

AU - Ma, Xun

AU - Tang, Guoxin

PY - 2020/7

Y1 - 2020/7

N2 - Fast and accurate acquisition of voltage components is the basic requirement for grid-tied inverters to realize various control under unbalanced grids. In view of this situation, a delay sampling period filter, which rapidly separates each voltage component by delaying two sampling periods in dq frame, is proposed in this article. In view of the noise interference, a delay operation period filter (DOPF) is proposed to scale the operation period and limit the noise to an acceptable range. The complete positive sequence components (PSC) extraction method based on the developed DOPF+ moving average filter (MAF) algorithm is presented, combing the advantages of DOPF and MAF for eliminating the double-frequency ac components and high-frequency noise, respectively. Finally, the feasibility and priority of the DOPF+MAF algorithm and PSC extraction method have been verified by the physical experimental results.

AB - Fast and accurate acquisition of voltage components is the basic requirement for grid-tied inverters to realize various control under unbalanced grids. In view of this situation, a delay sampling period filter, which rapidly separates each voltage component by delaying two sampling periods in dq frame, is proposed in this article. In view of the noise interference, a delay operation period filter (DOPF) is proposed to scale the operation period and limit the noise to an acceptable range. The complete positive sequence components (PSC) extraction method based on the developed DOPF+ moving average filter (MAF) algorithm is presented, combing the advantages of DOPF and MAF for eliminating the double-frequency ac components and high-frequency noise, respectively. Finally, the feasibility and priority of the DOPF+MAF algorithm and PSC extraction method have been verified by the physical experimental results.

KW - Delay operation period filter (DOPF) algorithm

KW - noise immunity

KW - positive sequence components (PSCs)

KW - unbalanced grid

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A Fast Positive Sequence Components Extraction Method with Noise Immunity in Unbalanced Grids

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Keywords

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