NDLI: Evaluation of supraharmonic emission levels of multiple grid-connected VSCs

Content Provider	IET Digital Library
Author	Wang, Ying Luo, Daijun Xiao, Xianyong
Abstract	Supraharmonic is an inevitable power quality issue, with the rapid development of power electronic technologies, receiving more and more attention. Firstly, this study analyses the supraharmonic emission mechanism of voltage source converter (VSC) based on sinusoidal pulse-width modulation. The mathematical analysis shows that the supraharmonics emitted by grid-connected VSC mainly distribute near the integer multiple of its switching frequency, and grid-connected VSCs are essentially supraharmonic voltage sources. Then, this study proposes the supraharmonic equivalent circuit model of multiple VSCs grid-connected system, by modelling grid-connected VSCs as supraharmonic voltage sources and connecting them in parallel with the LCL filters. Based on the proposed model, considering the primary and secondary emissions, a method is proposed to evaluate the supraharmonic current emission of one VSC and the total supraharmonic current emission flowing into the grid. Finally, simulation and field measurements show that the proposed method can effectively evaluate the supraharmonic emission levels of multiple VSCs grid-connected systems.
Starting Page	5597
Ending Page	5604
Page Count	8
ISSN	17518687
Volume Number	13
e-ISSN	17518695
Issue Number	Issue 24, Dec (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/13/24
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2019.0182
Journal	IET Generation, Transmission & Distribution
Publisher Date	2019-09-26
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Equivalent Circuit Essentially Supraharmonic Voltage Source Grid-connected VSC Harmonics Inevitable Power Quality Issue Integer Multiple Mathematical Analysis Multiple VSCs Grid-connected System Power Converter Power Electronic Technology Power Electronics Power Grid Power Supplies to Apparatus Power Supply Quality Power System Harmonics Primary Emission Secondary Emission Sinusoidal Pulse-width Modulation Supraharmonic Emission Levels Supraharmonic Emission Mechanism Supraharmonic Equivalent Circuit Model Total Supraharmonic Current Emission Voltage Source Converter
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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