Minimisation of power oscillations with a novel optimal control strategy for distributed generation inverter under grid faulty and harmonic networks

摘要: The increasing penetration of distributed generation (DG) inverters supplying power to the networks bring challenges system under grid faulty and harmonic since negative sequence components lead double oscillations. Reference current (RCG)-based flexible control strategies ensure solutions mitigate oscillations on signals maintain a more stable, secure reliable operation. In this direction, study proposes an RCG-based optimal strategy that reduces active reactive at parameter values ensures minimum contents side unbalanced distortion grid. main cause is comprehensively demonstrated, optimised examined with numerical studies theoretically. Control parameters are accurately selected by courtesies optimisation function minimise A fast robust third-order sinusoidal signal integrator (TOSSI) extracts positive–negative for calculation RCG. To provide transient response achieve almost tracking errors zero level, proportional complex integral (PCI) regulation controller selected. Various case have been performed show validity availability proposed entire system, including control, optimisation, TOSSI PCI.