Published Paper Details:

A grid tied inverter mainly required voltage and current measurement to reactive power and active power or else inverter output current. Voltage sensors are reliable information on the phase angle using these additional components increase the cost of production and system complexity. In this paper, sensorless voltage control for a grid tied inverter using disturbance observer with net meter is presented. The grid voltage is estimated by disturbance observer in the stationary frame reference using the reference signal and current measurement. The disturbance observers estimate the grid voltage with reasonable accuracy with Presence variable such as the unbalanced condition and harmonics distortion. The result waveforms shows that a phase leg depending on the estimation bandwidth.to outcome this limitation, a phase lead compensation is newly introduced.by using these new concept phase angle of a grid voltage can be completely restored. If the phase angle of grid is initially unknown. New technology based Proposed Sensorless voltage control experiments using 2KVA prototype inverter.