| Abstract |
Increasing penetration of converter-based generation in the power system has shown the important role of conventional power plants. Absence of the inherent capabilities of directly-connected synchronous machines in these conventional power plants in mitigation of frequency and provision ofancillary services in the power system has become a challenge for decentralised generation units. Ithas forced them to comply with grid restoration as the alternatives of synchronous generators. Themajority of installed capacity of wind turbines currently use grid-feedings current control, that theyare always dependent on another generation unit to synchronise with in islanding situation and haveno participation in ancillary services to protect frequency and voltage profile of the grid. Therefore,the necessity for another control performance under the definition of grid-supporting voltage sourceconverters has arisen. Rotating Voltage Vector Control's principle has placed it on this category. Rotating Voltage Vector Control models the converter as a voltage source which is capable of seamless operation in island mode as it requires no Phase-locked loop in its control method. This paper investigates the performance of RVVC in islanding operation mode following a split in the power system. Also, droop controllers are integrated into the control strategy to provide primary control features for the generation unit. Simulation results in Matlab are presented to show the performance of the control in the presence of loads, including resistive, directly-connected drives and converter-connected drives in islanding situation. |
