Impact of modern electronic equipment on the assessment of network harmonic impedance
File(s)
Accepted version
Author(s)
Chakravorty, D
Meyer, J
Schegner, P
Yanchenko, S
Schocke, M
Type
Journal Article
Abstract
Network harmonic impedance forms the link
between harmonic currents emitted by individual devices and the
harmonic voltage levels in the grid. It is essential for the
definition of current emission limits in order to ensure
Electromagnetic Compatibility between all equipment connected
to the grid. Among all electrical equipment in future smart grid
electronic devices, like PV inverters, EV chargers or lamps with
electronic ballast, will have a dominating share. This is expected
to have a considerable impact on the network harmonic
impedance characteristic.
The paper discusses the frequency-dependent input impedance
of different types of modern electronic equipment and its
potential impact on the network harmonic impedance. It is
shown that the semiconductor switching results in a variation of
the impedance within the fundamental cycle. This is not
considered by the presently used assessment methods as they
assume only passive network elements. Beside a method to
measure these variations, several indices are introduced to
quantify the level of its impact. The paper aims to provide some
impulses for further discussions, particularly about the definition
of network harmonic impedance in presence of electronic devices,
the necessity to include these variations in realistic harmonic
studies and if this has to be considered in the standardization.
between harmonic currents emitted by individual devices and the
harmonic voltage levels in the grid. It is essential for the
definition of current emission limits in order to ensure
Electromagnetic Compatibility between all equipment connected
to the grid. Among all electrical equipment in future smart grid
electronic devices, like PV inverters, EV chargers or lamps with
electronic ballast, will have a dominating share. This is expected
to have a considerable impact on the network harmonic
impedance characteristic.
The paper discusses the frequency-dependent input impedance
of different types of modern electronic equipment and its
potential impact on the network harmonic impedance. It is
shown that the semiconductor switching results in a variation of
the impedance within the fundamental cycle. This is not
considered by the presently used assessment methods as they
assume only passive network elements. Beside a method to
measure these variations, several indices are introduced to
quantify the level of its impact. The paper aims to provide some
impulses for further discussions, particularly about the definition
of network harmonic impedance in presence of electronic devices,
the necessity to include these variations in realistic harmonic
studies and if this has to be considered in the standardization.
Date Issued
2016-07-07
Date Acceptance
2016-07-07
Citation
IEEE Transactions on Smart Grid, 2016, 8 (1), pp.382-390
ISSN
1949-3053
Publisher
IEEE
Start Page
382
End Page
390
Journal / Book Title
IEEE Transactions on Smart Grid
Volume
8
Issue
1
Copyright Statement
© 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Subjects
Science & Technology
Technology
Engineering, Electrical & Electronic
Engineering
Electronic loads
fast Fourier transform
frequency domain analysis
harmonic impedance
smart grid
time domain analysis
DISTORTION
CIRCUIT
KHZ
0906 Electrical And Electronic Engineering
0915 Interdisciplinary Engineering
Publication Status
Published