Conference Paper

A Current Source Converter-Based Active Power Filter for Mitigation of Harmonics at the Interface of Distribution and Transmission Systems

Tubitak Uzay Power Electron. Group, Ankara, Turkey
DOI: 10.1109/ECCE.2010.5618017 Conference: Energy Conversion Congress and Exposition (ECCE), 2010 IEEE
Source: IEEE Xplore


A medium power Current Source Converter (CSC) based Active Power Filter (APF) system is designed and implemented to suppress the amplification of low order harmonics at the Medium Voltage (MV) interface bus between the distribution and transmission systems, owing to the presence of large shunt capacitor banks installed only for reactive power compensation. For this purpose, four CSC based APF units designed at 1.0 kV are operated in parallel, and connected to the 31.5 kV MV bus via a specially designed coupling transformer. In each APF module, a specially designed LC-type input filter eliminates the switching ripples, and active damping method embedded into the control software suppresses harmonic frequencies around the natural frequency of the input filter. The resulting system can operate at relatively high frequencies in the range from 2.0 to 3.0 kHz, depending upon which selected harmonics among 5th, 7th, 11th, and 13th are to be eliminated. Furthermore, in order to reduce the installed capacity of CSCs, Selective Harmonic Amplification Method (SHAM) is applied to the APF system described in the paper. MV APF system has been built as a mobile system for temporary connection to a problematic MV interface bus, until a permanent solution is found for that location in the distribution system.

18 Reads
  • [Show abstract] [Hide abstract]
    ABSTRACT: A strategy to eliminate harmonics from the grid current as well as the voltage of the point of common coupling (PCC) for microgrid applications is presented in this paper. The position of the harmonics reduction unit is selected so that it can reduce the harmonics level of the grid current and PCC voltage harmonics irrespective of the distribution of the renewable energy sources in microgrid. The proposed compensation system can be operated in both grid connected and islanded microgrid system without changing any configuration. In the proposed control algorithm, the required amount of attenuation for the harmonics is determined to meet the THD requirement specified by IEEE 519. Fast and efficient algorithm for phase detection irrespective of the presence of harmonics has been utilized for the system. The effectiveness of proposed method is verified by simulation and experimental results.
    No preview · Conference Paper · Jan 2013
  • [Show abstract] [Hide abstract]
    ABSTRACT: Decentralized control of a new harmonics distribution method for microgrid is presented in this paper. The compromise between voltage regulation at point of common coupling (PCC) and harmonics sharing is provided. The control algorithm that optimizes microgrid performance regarding these two factors is proposed and its implementation is described. The effect of small error in coupling impedance estimation and a way to resolve the problem is presented. The simulation and experimental results for the proposed configuration are provided.
    No preview · Conference Paper · Jan 2013
  • [Show abstract] [Hide abstract]
    ABSTRACT: Harmonic distortion and flicker severity have become the main concerns in power transmission networks. Different types of harmonic and flicker sources exist in power systems, such as arc furnaces and cycloconverters. A power quality problem found in networks can cause additional temperature rise, losses, noise, and irritation in the lighting equipment. The aim of this study is to identify the level of harmonics and flicker in the 380-kV transmission network of Turkey. The measurement and analysis are performed using a specially developed power quality analyzer. The effects of harmonics and flicker on the network are discussed based on real measurement results. Moreover, the measurement results are compared to the current regulations in Turkey.
    No preview · Article · Jan 2013 · Turkish Journal of Electrical Engineering and Computer Sciences
Show more