Zeni, Lorenzo1; Jóhannsson, Hjörtur3; Hansen, Anca Daniela1; Sørensen, Poul Ejnar1; Hesselbæk, Bo5; Kjær, Philip C.6
1 Department of Wind Energy, Technical University of Denmark2 Wind Energy Systems, Department of Wind Energy, Technical University of Denmark3 Department of Electrical Engineering, Technical University of Denmark4 Center for Electric Power and Energy, Department of Electrical Engineering, Technical University of Denmark5 DONG Energy A/S6 Aalborg University
A first study of voltage stability with relevant amount of Voltage Sourced Converter based High Voltage Direct Current (VSC-HVDC) transmission is presented, with particular focus on the converters’ behaviour when reaching their rated current. The detrimental effect of entering the current limitation on the Power-Voltage (PV) curves at a load bus is exemplified on a three-bus system, proposing a method to model the converters in current limiting mode through ideal current sources. The influence of the current magnitude and angle on the reduced stability margin is analysed and results show that, when the current limit is reached, despite the detrimental effect brought about by an increased equivalent transmission impedance, the loss of stability margin can be minimised by proper control of the converter.
2013 Ieee Pes Innovative Smart Grid Technologies Conference Europe, 2013
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2013 4th IEEE PES Innovative Smart Grid Technologies Europe, 2013