Online Detection of Fundamental and Interharmonics in AC Mains for Parallel Operation of Multiple Grid-Connected Power Converters

Boli Chen; Gilberto Pin; Wai Man Ng; Peng Li; Thomas Parisini; Shu-Yuen Ron Hui

doi:10.1109/TPEL.2017.2789303

Online Detection of Fundamental and Interharmonics in AC Mains for Parallel Operation of Multiple Grid-Connected Power Converters

Boli Chen
, Gilberto Pin
, Wai Man Ng
, Peng Li
, Thomas Parisini
, Shu-Yuen Ron Hui^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

19 Citations (Scopus)

Abstract

Parallel operation of multiple grid-connected power converters through LCL filters is known to have the potential problem of triggering oscillations in the ac mains. Such oscillatory frequencies are not integral multiples of the fundamental frequency and, hence, form a new source of interharmonics. Early detection of such oscillations is essential for the parallel power converters to move out of the unstable zone. This paper presents an online observer-based algorithm that can perform fast detection of interharmonics within a specified frequency band. The algorithm has been adopted in a specific and reduced form from an integral observer algorithm for detection of fundamental and interharmonic voltage components in the ac mains. A new method based on the kernel signal for fast interharmonic detection is proposed and practically verified. It has been implemented in a digital controller to detect oscillations such as those occurring between two grid-connected power converters. The practical results indicate that the algorithm can locate such frequency within the specific frequency band within one mains cycle. © 1986-2012 IEEE.

Original language	English
Pages (from-to)	9318-9330
Journal	IEEE Transactions on Power Electronics
Volume	33
Issue number	11
DOIs	https://doi.org/10.1109/TPEL.2017.2789303
Publication status	Published - 1 Nov 2018
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

This work was supported in part by the Hong Kong Research Council under the Theme-Based Research Fund T23-701/14-N, and in part by the European Union’s Horizon 2020 research and innovation programme (KIOS CoE) under Grant 739551.

Research Keywords

Active power filters
fundamental extraction
harmonics detection
interharmonics detection

RGC Funding Information

RGC-funded

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@article{3264e1fd90c14e27bfb754133acf4292,

title = "Online Detection of Fundamental and Interharmonics in AC Mains for Parallel Operation of Multiple Grid-Connected Power Converters",

abstract = "Parallel operation of multiple grid-connected power converters through LCL filters is known to have the potential problem of triggering oscillations in the ac mains. Such oscillatory frequencies are not integral multiples of the fundamental frequency and, hence, form a new source of interharmonics. Early detection of such oscillations is essential for the parallel power converters to move out of the unstable zone. This paper presents an online observer-based algorithm that can perform fast detection of interharmonics within a specified frequency band. The algorithm has been adopted in a specific and reduced form from an integral observer algorithm for detection of fundamental and interharmonic voltage components in the ac mains. A new method based on the kernel signal for fast interharmonic detection is proposed and practically verified. It has been implemented in a digital controller to detect oscillations such as those occurring between two grid-connected power converters. The practical results indicate that the algorithm can locate such frequency within the specific frequency band within one mains cycle. {\textcopyright} 1986-2012 IEEE.",

keywords = "Active power filters, fundamental extraction, harmonics detection, interharmonics detection",

author = "Boli Chen and Gilberto Pin and Ng, \{Wai Man\} and Peng Li and Thomas Parisini and Hui, \{Shu-Yuen Ron\}",

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Online Detection of Fundamental and Interharmonics in AC Mains for Parallel Operation of Multiple Grid-Connected Power Converters. / Chen, Boli; Pin, Gilberto; Ng, Wai Man et al.
In: IEEE Transactions on Power Electronics, Vol. 33, No. 11, 01.11.2018, p. 9318-9330.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Online Detection of Fundamental and Interharmonics in AC Mains for Parallel Operation of Multiple Grid-Connected Power Converters

AU - Chen, Boli

AU - Pin, Gilberto

AU - Ng, Wai Man

AU - Li, Peng

AU - Parisini, Thomas

AU - Hui, Shu-Yuen Ron

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2018/11/1

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N2 - Parallel operation of multiple grid-connected power converters through LCL filters is known to have the potential problem of triggering oscillations in the ac mains. Such oscillatory frequencies are not integral multiples of the fundamental frequency and, hence, form a new source of interharmonics. Early detection of such oscillations is essential for the parallel power converters to move out of the unstable zone. This paper presents an online observer-based algorithm that can perform fast detection of interharmonics within a specified frequency band. The algorithm has been adopted in a specific and reduced form from an integral observer algorithm for detection of fundamental and interharmonic voltage components in the ac mains. A new method based on the kernel signal for fast interharmonic detection is proposed and practically verified. It has been implemented in a digital controller to detect oscillations such as those occurring between two grid-connected power converters. The practical results indicate that the algorithm can locate such frequency within the specific frequency band within one mains cycle. © 1986-2012 IEEE.

AB - Parallel operation of multiple grid-connected power converters through LCL filters is known to have the potential problem of triggering oscillations in the ac mains. Such oscillatory frequencies are not integral multiples of the fundamental frequency and, hence, form a new source of interharmonics. Early detection of such oscillations is essential for the parallel power converters to move out of the unstable zone. This paper presents an online observer-based algorithm that can perform fast detection of interharmonics within a specified frequency band. The algorithm has been adopted in a specific and reduced form from an integral observer algorithm for detection of fundamental and interharmonic voltage components in the ac mains. A new method based on the kernel signal for fast interharmonic detection is proposed and practically verified. It has been implemented in a digital controller to detect oscillations such as those occurring between two grid-connected power converters. The practical results indicate that the algorithm can locate such frequency within the specific frequency band within one mains cycle. © 1986-2012 IEEE.

KW - Active power filters

KW - fundamental extraction

KW - harmonics detection

KW - interharmonics detection

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DO - 10.1109/TPEL.2017.2789303

M3 - RGC 21 - Publication in refereed journal

SN - 0885-8993

VL - 33

SP - 9318

EP - 9330

JO - IEEE Transactions on Power Electronics

JF - IEEE Transactions on Power Electronics

IS - 11

ER -

Online Detection of Fundamental and Interharmonics in AC Mains for Parallel Operation of Multiple Grid-Connected Power Converters

Abstract

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