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The dynamic impacts of controlling zero sequence current in a three-phase four-wire low voltage (LV) distribution network with a four-leg voltage source inverter (VSI) and PV installations are investigated in this paper. The PV VSI is designed to control active power at unity power factor (p.f) with additional neutral and zero sequence current controls. Inherently, most of the three-phase four-wire...
This paper analyses the effect of a smart voltage source inverter (VSI) embedded in a photovoltaic (PV) unit on the voltage stability/reactive power balancing of a microgrid. The conventional unity power factor PV-VSI is modified to operate for both active and reactive power management operations. The PV integrated AC/DC microgrid system is designed with a central smart VSI in PSCAD/EMTDC software...
In recent years, the microgrid has emerged as a promising concept and gained significant attention along with different renewable energy sources in the distribution network. Proper power coordination and strategic controller selection can extend the horizon of applications of the traditional microgrid system. This paper demonstrates the multi-operations from a single stage transformerless voltage...
Photovoltaic (PV) units along with other distributed energy resources (DERs) are located close to each other in distributed systems and they are equipped with different controllers. In such systems each manipulated variable may affect several controlled variables causing interaction between the input/output loops and degrade the dynamic performance of the system. This paper presents several case studies...
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