Grid interconnection of renewable energy source with T-type inverter based DSTATCOM

In this paper, the grid integrated T-type inverter based DSTATCOM presented for harmonics elimination, reactive power compensation and active injection. It is renowned multilevel converters can possess great advantages in case of harmonic elimination and reduced switching losses compared to that of two-level counterparts. But, the neutral-point-clamped inverter in low voltage applications suffer from very large semiconductor conduction losses due to the flow of current through two conducting devices. T-type multilevel inverter alleviate problem of conduction losses, because it requires only single outer loop to connect the converter output to the positive and negative dc side. The switching losses will increases; due to the full dc voltage appearing across the switching. The instantaneous reactive power theory based reference current estimation is presented with maximum power point (MPPT) tracking. The MPPTalgorithm based on perturb and observe is integrated with instantaneous reactive power theory.The simulated response of the T-type inverter based DSTATCOM is show effective for injecting active power from photo voltaic system.