TY - GEN
T1 - An IGBT based series power flow controller for multi-terminal HVDC transmission
AU - Balasubramaniam, Senthooran
AU - Liang, Jun
AU - Ugalde-Loo, Carlos E.
PY - 2014/10/23
Y1 - 2014/10/23
N2 - Increased offshore wind penetration has raised the need of multi-terminal high-voltage direct-current (MTDC) grids. An MTDC system will enable cross-border energy exchange where the excessive energy can be transferred between countries, increasing the functionality and reliability of the network. However, as the number of terminals and branches increases, power flow management becomes a challenge. To improve reliability and efficiency, power flow needs to be rescheduled between terminals. This can be achieved by introducing a power flow controller (PFC). In this paper, an insulated-gate bipolar transistor based series PFC is proposed. A PFC is basically a low power rated controllable voltage source connected in series with a DC line. It enables the regulation of grid power flow via a small series voltage injection. A four-terminal MTDC system is modelled using Simulink/ SimPowerSystems to test the impact of the proposed device. This is analysed under two different control strategies for the voltage source converter-based terminals; namely, master-slave and voltage droop control. Simulation results show that the PFC is capable of enhancing the system performance by suitably redirecting the power flow at the point of connection. Moreover, the results clearly illustrate that the converter control modes effectively affect the power flow in the MTDC grid.
AB - Increased offshore wind penetration has raised the need of multi-terminal high-voltage direct-current (MTDC) grids. An MTDC system will enable cross-border energy exchange where the excessive energy can be transferred between countries, increasing the functionality and reliability of the network. However, as the number of terminals and branches increases, power flow management becomes a challenge. To improve reliability and efficiency, power flow needs to be rescheduled between terminals. This can be achieved by introducing a power flow controller (PFC). In this paper, an insulated-gate bipolar transistor based series PFC is proposed. A PFC is basically a low power rated controllable voltage source connected in series with a DC line. It enables the regulation of grid power flow via a small series voltage injection. A four-terminal MTDC system is modelled using Simulink/ SimPowerSystems to test the impact of the proposed device. This is analysed under two different control strategies for the voltage source converter-based terminals; namely, master-slave and voltage droop control. Simulation results show that the PFC is capable of enhancing the system performance by suitably redirecting the power flow at the point of connection. Moreover, the results clearly illustrate that the converter control modes effectively affect the power flow in the MTDC grid.
KW - DC line
KW - H-bridge
KW - high-voltage direct-current
KW - insulated-gate bipolar transistor
KW - multi-terminal high-voltage direct-current grid
KW - power flow controller
KW - voltage source converter
UR - http://www.scopus.com/inward/record.url?scp=84910031128&partnerID=8YFLogxK
U2 - 10.1109/UPEC.2014.6934626
DO - 10.1109/UPEC.2014.6934626
M3 - Conference proceeding
AN - SCOPUS:84910031128
T3 - Proceedings of the Universities Power Engineering Conference
BT - Proceedings of the Universities Power Engineering Conference
PB - IEEE Computer Society
T2 - 49th International Universities Power Engineering Conference, UPEC 2014
Y2 - 2 September 2014 through 5 September 2014
ER -