Grid-Voltage Sensorless Control of an LCL filter with Low Resonance Frequency

R. FANTINO; C. BUSADA; J. SOLSONA

Congreso; 2017 PRIME-LA Conference; 2017

A Grid-Voltage sensorless control strategy for LCL Grid-connected voltage source inverters is proposed. Positive and negative grid sequences used for synchronization are estimated using an observer. The control of the system is implemented with a strategy that allows the use of the proportional plus resonant regulator (PR) optimum design, regardless of the filter resonancefrequency. The effectiveness of the proposal is demonstrated by  Simulation in a realistic scenario