NDLI: Harmonic suppression analysis of a harmonic filtering distribution transformer with integrated inductors based on field

Content Provider	IET Digital Library
Author	Xu, Jiazhu Gu, Xiutian Liang, Chonggan Bai, Ziyi Kubis, Andreas
Abstract	This study analyses and evaluates the feasibility of a harmonic filtering distribution transformer (HFDT) for a harmonic reduction in low-voltage distribution networks. With this new-type transformer, power quality of the distribution systems can be improved by preventing the low-voltage-side harmonic currents from penetrating the higher voltage side. As the physical size of available space in prefabricated substations is strictly limited, necessary low space occupying filtering techniques are needed. Therefore, an HFDT with integrated filtering inductors (IFIs) capable of being implemented in regular air-insulated prefabricated substations is proposed. Two sets of passive filters configured by IFIs and external capacitors are employed for harmonic filtering. Two methods for estimating the inductance parameter are provided. One is the dimension-based method and the other is the reduced-order inductance matrix method. The relevant harmonic reduction analysis is based on simulations with a field–circuit coupling model, which consists of a three-dimensional finite-element electromagnetic model of an HFDT with IFIs and a corresponding electric circuit of a simplified distribution network. These simulations prove that the described HFDT can effectively reduce specific harmonic currents with IFI-based filters. Finally, the successful suppression of harmonics is demonstrated and discussed based on field-test measurements.
Starting Page	615
Ending Page	623
Page Count	9
ISSN	17518687
Volume Number	12
e-ISSN	17518695
Issue Number	Issue 3, Feb (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/12/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2017.1153
Journal	IET Generation, Transmission & Distribution
Publisher Date	2017-09-21
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Air Insulation Capacitor Dimension-based Method Distribution Network External Capacitor Field-circuit Coupling Simulation Field-test Measurement Finite Element Analysis Gaseous Insulation, Breakdown And Discharges Harmonic Filtering Distribution Transformer Harmonic Reduction Analysis Harmonic Suppression Analysis Harmonics HFDT IFI Inductance Parameter Estimation Integrated Filtering Inductor Linear Algebra Low Space Occupying Filtering Technique Low-voltage Distribution Network Low-voltage-side Harmonic Current Prevention Matrix Algebra Numerical Analysis Parameter Estimation Passive Filter Power Engineering Computing Power Harmonic Filter Power Quality Power Supply Quality Power System Harmonics Power Transformer Reduced-order Inductance Matrix Method Regular Air-insulated Prefabricated Substation Substations Three-dimensional Finite-element Electromagnetic Model Transformer And Reactors
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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