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.

16 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.
    Energy Conversion Congress and Exposition (ECCE), 2013 IEEE; 01/2013
  • [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.
    Energytech, 2013 IEEE; 01/2013
  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper presents a control algorithm based on enhanced phase-locked loop (EPLL) for distribution static compensator (DSTATCOM) to compensate reactive power, to provide load balancing, to eliminate harmonics, to correct power factor, and to regulate point of common coupling (PCC) voltages under linear and nonlinear loads. In this approach, an extraction of fundamental active and reactive power components of load currents for the estimation of source currents includes a signal-processing algorithm based on the EPLL scheme. The proposed control algorithm is implemented using a digital signal processor. Test results on a developed DSTATCOM are presented to validate the proposed control algorithm for compensation of reactive power, load balancing, harmonics elimination, power factor correction, and zero voltage regulation at PCC.
    IEEE Transactions on Power Delivery 07/2013; 28(3):1516-1524. DOI:10.1109/TPWRD.2013.2257876 · 1.73 Impact Factor
Show more

Similar Publications