Under voltage sags

swells

stochastic load profiles and harmonic voltage distortion

conventional synchronisation mechanisms often fail to track the grid voltage immediately and accurately

leading to degraded control performance and potential power quality violations. Maintaining high power factor operation becomes critically important in polluted grid scenarios. To ensure stability under these challenging conditions

this paper focuses on maintaining balanced and accurate unit templates with a minimal phase delay and stable DC link voltage in the presence of unpredictable grid scenarios. The synchronising transfer switch provides smooth transitions between the grid-connected and islanded modes of operation

enhancing both power quality and system reliability. The optimisation of distributed energy resources to improve grid resilience

stability and overall efficiency of renewable energy integration is presented in this work. The key element of this integration is a multi-functional voltage source converter with a unique control strategy

enabling precise control over the charging and discharging processes of the battery. The system exhibits versatile capabilities

including harmonic mitigation

reactive power compensation

and seamless supply of active power to the grid. Performance assessments highlight the controller's ability to improve microgrid stability and smooth operational transition capabilities.