Conference paper
Interaction of droop control structures and its inherent effect on the power transfer limits in multi-terminal VSC-HVDC
Department of Electrical Engineering, Technical University of Denmark1
Center for Electric Power and Energy, Centers, Technical University of Denmark2
Electric Power Systems, Center for Electric Power and Energy, Centers, Technical University of Denmark3
Svenska Kraftnät4
Norwegian University of Science and Technology5
Future multi-terminal HVDC systems are expected to utilize dc voltage droop controllers and several control structures have been proposed in literature. This paper proposes a methodology to analyse the impact of various types of droop control structures using small-signal stability analysis considering all possible combinations of droop gains.
The different control structures are evaluated by the active power transfer capability as a function of the droop gains, considering various possible stability margins. This reveals the flexibility and robustness against active power flow variations, due to disturbances for all the implementations. A case study analyzing a three terminal HVDC VSC-based grid with eight different kinds of droop control schemes points out that three control structures outperform the remaining ones.
Additionally, a multi-vendor case is considered where the most beneficial combinations of control structures has been combined in order to find the best performing combination.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2017 |
| Pages: | 1-1 |
| Proceedings: | 2017 IEEE Power & Energy Society General MeetingIEEE Power and Energy Society General Meeting |
| Series: | Ieee Power and Energy Society General Meeting |
| ISBN: | 1538622114 , 1538622122 , 1538622130 , 9781538622117 , 9781538622124 and 9781538622131 |
| ISSN: | 19449933 and 19449925 |
| Types: | Conference paper |
| DOI: | 10.1109/PESGM.2017.8274693 |
| ORCIDs: | Thams, Florian |
Cybernetics HVDC power convertors HVDC power transmission HVDC transmission Load flow Power system stability Robustness Stability analysis VSC Voltage control active power flow variations active power transfer capability control structures dc voltage droop controllers droop control schemes droop control structures droop gains multiterminal HVDC systems multiterminal VSC-HVDC power grids power transfer limits power transmission control small-signal stability analysis terminal HVDC VSC voltage control
