Power Quality Enhancement at PCC of an Isolated Wind-BES Microgrid Using Improved Filtered X-Adaptive Control

摘要

This work proposes a solution for improving the voltage profile at point of common coupling (PCC) of an isolated microgrid using an improved filtered-X adaptive scheme. The power quality (PQ) is enhanced by filtering the component of load current so as to reduce the harmonic content. The enhanced PQ allows the application of voltage sensitive equipments and electronic loads together with nonlinear loads connected at PCC. The improved filtered X-control which is a variant of the least mean square (LMS) adaptive filter family, provides good convergence and low computational burden with good applicability in terms of noise reduction and harmonics filtering. Maximum power extraction scheme i.e. perturb and observe (P&O) is implemented to acquire the reference speed of synchronous generator (SG) generating wind power. The regulation of SG speed is acquired by implementing sensor-less field oriented control. The battery backs up the power, moreover, it promotes the overall performance of the microgrid. The test setup developed in the laboratory confirms the effective microgrid performance in the presence of load alterations and renewable intermittency.