IEEE Power Electronics Magazine - December 2019 - 41
Connecting the Home
Grid to the Public Grid
©ISTOCKPHOTO.COM/LUCADP
Field demonstration of virtual synchronous machines
by Qing-Chang Zhong, Yeqin Wang, and Beibei Ren
P
ower systems are going through a paradigm
shift. More and more distributed energy
re sources (DERs) and loads are being connected to power systems, mostly through
power electronic converters. These power electronic converters can be controlled as virtual synchronous machines (VSMs), leading to a unified interface for
grid integration. As a result, all active players in a power
system can take part in the regulation of system frequency
and voltage in a synchronized and democratized (SYNDEM) manner, significantly simplifying system operation
and improving grid stability, reliability, resiliency, security,
Digital Object Identifier 10.1109/MPEL.2019.2946700
Date of currevt version: 17 December 2019
2329-9207/19©2019IEEE
and sustainability. This article presents a pilot smart home
grid at the Llano River Field Station, Texas Tech University Center at Junction, that is built according to the SYNDEM grid architecture. The home grid consists of five
DER units, including four 3-kW solar units and one 3-kW
wind unit with built-in battery storage in each unit, and
one energy bridge for grid connection. The energy bridge
has two VSMs connected back-to-back with a common dc
bus. All the units are equipped with a self-synchronized
universal droop controller (SUDC) with many advanced
functions, i.e., black-start, grid-forming, self-synchronization without a phase-locked-loop (PLL), voltage and frequency regulation, power sharing, and power quality control. The home grid can work with or without the public
grid, with seamless mode change between grid-tied
December 2019
z IEEE POWER ELECTRONICS MAGAZINE
41
http://www.ISTOCKPHOTO.COM/LUCADP
IEEE Power Electronics Magazine - December 2019
Table of Contents for the Digital Edition of IEEE Power Electronics Magazine - December 2019
Contents
IEEE Power Electronics Magazine - December 2019 - Cover1
IEEE Power Electronics Magazine - December 2019 - Cover2
IEEE Power Electronics Magazine - December 2019 - Contents
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