Three Phase BES Supported Grid Interfaced PV-VSC with Synchronization Capability

What is it about?

This BES (Battery Energy Storage) supported PV-VSC (Photovoltaic-Voltage Source Converter) system interfaced to three phase utility network with synchronization and desynchronization capability is investigated at variable grid power mode of grid tied mode, prespecified grid power mode of grid interfaced mode, standalone mode, variable irradiance and load dynamics. This system functions in the utility network synchronized mode and standalone mode to ensure electricity to critical local loads without failure and mitigates harmonics in grid currents, while the power is available from at least one energy source. The implemented system supports the utility network at the peak load hours beside feeds the local loads, enhances the grid current power quality, and regulates the PCC (Point of Common Coupling) voltage near to reference voltage in an islanded mode, thus, ensures effective usages of PV panel, battery, and the VSC, which results in a reduced payback period of VSC and BES. The transition mode control guarantees seamless synchronization and desynchronization of the BES supported PV system with a battery connected at DC link to/from the grid according to the IEEE-1547 standard, and thus, protects the sensitive local loads from the load voltage transients. The frequency adaptive self tuning filter algorithm is utilized to estimate the peak magnitude of the fundamental frequency component of local nonlinear load current to achieve the harmonics free grid current following the IEEE-519 standard.

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Why is it important?

This system functions in the utility network synchronized mode and standalone mode to ensure electricity to critical local loads without failure and mitigates harmonics in grid currents, while the power is available from at least one energy source. The implemented system supports the utility network at the peak load hours beside feeds the local loads, enhances the grid current power quality, and regulates the PCC (Point of Common Coupling) voltage near to reference voltage in an islanded mode, thus, ensures effective usages of PV panel, battery, and the VSC, which results in a reduced payback period of VSC and BES.