Voltage harmonic elimination with RLC based interface smoothing filter

9th Curtin University of Technology Science and Engineering International Conference 2014

自然科学;工业技术

Chandrasekaran, K.^1 ; Ramachandaramurthy, V.K.^2

Department of Electronic Engineering, University Tunku Abdul Rahman, Perak, Malaysia^1

Power Quality Research Group, Universiti Tenaga Nasional, Malaysia^2

关键词: Digital simulation;    Dynamic voltage restorer (DVR);    Harmonic voltages;    Series active filters;    Simulated results;    Switching harmonics;    Total Harmonic Distortion (THD);    Voltage Source Inverter (VSI);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/78/1/012010/pdf
DOI  :  10.1088/1757-899X/78/1/012010

来源: IOP

【 摘 要 】

A method is proposed for designing a Dynamic Voltage Restorer (DVR) with RLC interface smoothing filter. The RLC filter connected between the IGBT based Voltage Source Inverter (VSI) is attempted to eliminate voltage harmonics in the busbar voltage and switching harmonics from VSI by producing a PWM controlled harmonic voltage. In this method, the DVR or series active filter produces PWM voltage that cancels the existing harmonic voltage due to any harmonic voltage source. The proposed method is valid for any distorted busbar voltage. The operating VSI handles no active power but only harmonic power. The DVR is able to suppress the lower order switching harmonics generated by the IGBT based VSI. Good dynamic and transient results obtained. The Total Harmonic Distortion (THD) is minimized to zero at the sensitive load end. Digital simulations are carried out using PSCAD/EMTDC to validate the performance of RLC filter. Simulated results are presented.