Design and Analysis of PV-Based DSTATCOM with LCL Filter for Localized Distribution System

摘要

In maximizing the power transmission from solar electricity to the grid, the use of power converters is very essential. In the early days, the problems in terms of power quality (PQ) have meant that both the voltage quality and current quality of the PV system linked to the grid are becoming increasingly crucial, particularly as nonlinear equipment has been widely used. This paper presents a PV-based DSTATCOM with LCL filter in power distribution network to reduce the power quality problem as a harmonic distortion presents in network. Low-frequency-induced harmonics can be reduced by an LCL filter and a satisfying grid-side current can be generated with a relative low induction in comparison with the L filter. The new poles implemented by LC part lead to resonance in the scheme, leading to stability problems. This paper introduces a compensation technique using the SRF theory to enhance such issues so that efficiency in the constructed LCL filter scheme can be enhanced. The use of the active damping technique can rectify this issue. The proposed system is simulated in MATLAB/SIMULINK to improve the performance of the system by harmonic distortion reduction.