Three-Phase Transformerless Shunt Active Power Filter With Reduced Switch Count for Harmonic Compensation in Grid-Connected Applications


Shunt active power filter (SAPF) is the prevalent arrangement against nonlinear burdens, current sounds, and power quality issues. APF topologies for harmonic compensation utilize various high-control rating parts and are in this manner disadvantageous.Hybrid topologies consolidating low-control rating APF with aloof channels are utilized to lessen the power rating of voltage source inverter (VSI). Mixture APF topologies for high-control rating frameworks utilize a transformer with expansive quantities of aloof segments.

In this project, a novel four-switch two-leg VSI topology for a three-stage SAPF is proposed for decreasing the framework cost and size. The proposed topology includes a two-arm connect structure, four switches, coupling inductors, and sets of LC PFs. The third leg of the three-stage VSI is evacuated by dispensing with the arrangement of intensity exchanging gadgets, in this way specifically interfacing the stage with the negative terminals of the dc-connect capacitor. The proposed topology upgrades the harmonic pay ability and furnishes finish responsive power remuneration contrasted and customary APF topologies. The new test model is tried in the research facility to check the outcomes as far as aggregate consonant bending, adjusted supply ebb and flow, and harmonic compensation, following the IEEE-519 standard.

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