TY - GEN
T1 - Optimal Control of MTDC for Improving Rotor Angle Stability of AC System
AU - Huang, Weihuang
AU - Yuan, Xiaotian
AU - Rao, Hong
AU - Li, Yan
AU - Li, Yujun
AU - Peng, Faxi
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/10
Y1 - 2019/10
N2 - Rotor angle stability of meshed AC/DC system due to the decreased effective inertia with the high penetration of renewables has become a major challenge. An easy and feasible way to enhance the rotor stability of power system provided by Multi-terminal DC (MTDC) grid is to fast modulate the power reference of standard power sharing droop control of each converter based on the rotor speed deviations of the selected generators. However, this feedback based scheme does not consider the coordination of each converter, which cannot render an optimal solution for the stability issue of the system and cannot make full use of the connected converter capability. To overcome this, this paper proposes an optimal based control of MTDC grid for improving the rotor angle stability of power system. First, MTDC grid model is well established by the linearization of power flow equations of DC grid. Then AC/DC meshed system model with the power modulation control of DC grid is further established. Furthermore, the optimal based control of MTDC grid is deduced by the online minimization of the rotor angle deviations of generators and the control energy. Finally, the nonlinear numerical simulations of one simple three generators nine buses AC/DC meshed system have demonstrated the effectiveness of the proposed optimal based scheme in three phase fault and sudden load changes in AC system.
AB - Rotor angle stability of meshed AC/DC system due to the decreased effective inertia with the high penetration of renewables has become a major challenge. An easy and feasible way to enhance the rotor stability of power system provided by Multi-terminal DC (MTDC) grid is to fast modulate the power reference of standard power sharing droop control of each converter based on the rotor speed deviations of the selected generators. However, this feedback based scheme does not consider the coordination of each converter, which cannot render an optimal solution for the stability issue of the system and cannot make full use of the connected converter capability. To overcome this, this paper proposes an optimal based control of MTDC grid for improving the rotor angle stability of power system. First, MTDC grid model is well established by the linearization of power flow equations of DC grid. Then AC/DC meshed system model with the power modulation control of DC grid is further established. Furthermore, the optimal based control of MTDC grid is deduced by the online minimization of the rotor angle deviations of generators and the control energy. Finally, the nonlinear numerical simulations of one simple three generators nine buses AC/DC meshed system have demonstrated the effectiveness of the proposed optimal based scheme in three phase fault and sudden load changes in AC system.
KW - Multi-terminal DC grid (MTDC)
KW - Optimal based control
KW - Rotor angle stability
KW - Voltage Source Converter (VSC)
UR - https://www.scopus.com/pages/publications/85096412473
U2 - 10.1109/APAP47170.2019.9225041
DO - 10.1109/APAP47170.2019.9225041
M3 - 会议稿件
AN - SCOPUS:85096412473
T3 - APAP 2019 - 8th IEEE International Conference on Advanced Power System Automation and Protection
SP - 1886
EP - 1890
BT - APAP 2019 - 8th IEEE International Conference on Advanced Power System Automation and Protection
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 8th IEEE International Conference on Advanced Power System Automation and Protection, APAP 2019
Y2 - 21 October 2019 through 24 October 2019
ER -
