Implementation of Modified Adaptive Control Strategy for Reduced-Switch PV-DSTATCOM with a T-Connected Transformer for Power Quality Improvement
Abstract
In this work, a new two-leg three-phase three-wire VSC based reduced-switch PV-DSTATCOM using Modified Adaptive
Control Strategy and a T-Connected transformer is proposed for Power Quality Improvement. Two single phase linear
transformers are connected in T-Configuration at PCC for reduction of neutral current and the required rating of the
system is reduced. The PV-DSTATCOM uses a boost converter circuit operated by IC-MPPT to attain power sharing with
grid. The PWM current controller is introduced to drive the DSTATCOM and its reference supply currents are generated
based on new modified techniques. The reduced switch PV-DSTATCOM is tested for power factor correction, reactive
power compensation, load balancing etc. The neural current is compensated using T-connected transformer which is
connected with the third split leg of the VSC via small capacitor as the conventional three-phase four wire six or eight
switch DSTATCOM has the problem of producing switching harmonics distortion. The proposed system is replicated in
MATLAB/Simulink using Sim-Power-Systems software based environment
