Trilateral control for <i>LCL</i> filter‐based system with single grid current sensor in weak grid

A trilateral control for LCL filter-based system is introduced by the authors with a single grid current sensor in weak conditions. The filter increases complexity when uncertain nature of comes into picture. Moreover, traditional three-loop technique requires three sensors on inverter side, voltage to sense across capacitor, and side combined sensing. novel utilising implemented current. This has reduced considerable number sensors. α axis proportional sensed ‘a’ phase β utility acquired employing controller reference quantities computation another variable, that is, inductor executed an estimation algorithm. proposed provides feature reducing implementation financial value weight reduces size hardware. synchronisation modified dual second-order generalised integrator digital phase-locked loop grid-connected converter. offers advantage ease implementation, good performance, high stability. validity scheme demonstrated simulated waveform obtained MATLAB/Simulink platform. Finally, effectiveness further justified experimental procured from prototype developed laboratory.