Journal of Electrical Engineering and Electronic Technology2325-9833

Research Article, J Electr Eng Electron Technol Vol: 1 Issue: 8

Modified Filter for Enhancement of Power Quality in Distribution Networks

Liang X1*, Lie TT1 and Haquey MH2
1Department of Electrical and Electronic Engineering, Auckland University of Technology, Auckland, New Zealand
2School of Engineering, University of South Australia, Adelaide, Australia
Corresponding author : Lie TT
Department of Electrical and Electronic Engineering, Auckland University of Technology, Auckland, New Zealand
Tel: + 64 9 921 9999 ext 6447
E-mail:
[email protected]
Received: June 23, 2016 Accepted: September 06, 2016 Published: September 13, 2016
Citation: Liang X, Lie TT, Haquey MH (2016) Modified Filter for Enhancement of Power Quality in Distribution Networks. J Electr Eng Electron Technol 5:3. doi:10.4172/2325-9833.1000131

Abstract

The recent rise in renewable energy sources has brought with it a corresponding rise in the utilization of Voltage Source Converters (VSCs). These typically contain a Pulse Width Modulation (PWM) switched element that can introduce harmonics into the power grid, resulting in equipment damage and failure. In order to suppress excessive harmonics and improve performance, various lowpass filters are inserted between the VSC and grid. This paper presents a comparative and systematic analysis of the LCL filter and its derivatives based on both theoretical and simulation results. The paper details the impact of each parameter on the system behaviour, as well as a performance analysis between different filter structures such as the conventional LCL filter, LLCL filter, LCL-LC filter and others. Then a design process of the modified filter is introduced with particular focus on development of a formal model which allows the filter components to be determined while maintaining filter performance and reducing damping loss.

Keywords: Harmonic attenuation; LCL filter; LLCL filter; LCLLC filter; Passive damping

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