TY - GEN
T1 - Modulation and control of MMC based multiterminal HVDC
AU - Yao, Xiu
AU - Herrera, Luis
AU - Wang, Jin
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/11/11
Y1 - 2014/11/11
N2 - Multi-terminal High Voltage dc Transmission (MTDC) is used to reduce the power losses over two distant regions. It is difficult for typical three level inverters to reach the desired dc bus voltage levels, e.g. > 500 kV, due to the large voltage stress on each switch and switching transients. For this reason, Modular Multilevel Converters (MMC) have gained popularity in High Voltage dc Transmission (HVDC) applications and are currently a promising solution. This paper first re-visits the dynamic equations of the circulating current of an MMC to incorporate a disturbance term. Based on the modified equation, a disturbance rejection controller is proposed to eliminate the ac part of this current. In a larger scale, different strategies are presented to regulate the active power, reactive power, and dc bus voltage in an MTDC system. Based on these, a case study on the Lower Churchill MTDC project is illustrated to show the feasibility of an actual MMC implementation.
AB - Multi-terminal High Voltage dc Transmission (MTDC) is used to reduce the power losses over two distant regions. It is difficult for typical three level inverters to reach the desired dc bus voltage levels, e.g. > 500 kV, due to the large voltage stress on each switch and switching transients. For this reason, Modular Multilevel Converters (MMC) have gained popularity in High Voltage dc Transmission (HVDC) applications and are currently a promising solution. This paper first re-visits the dynamic equations of the circulating current of an MMC to incorporate a disturbance term. Based on the modified equation, a disturbance rejection controller is proposed to eliminate the ac part of this current. In a larger scale, different strategies are presented to regulate the active power, reactive power, and dc bus voltage in an MTDC system. Based on these, a case study on the Lower Churchill MTDC project is illustrated to show the feasibility of an actual MMC implementation.
UR - https://www.scopus.com/pages/publications/84934290936
U2 - 10.1109/ECCE.2014.6953435
DO - 10.1109/ECCE.2014.6953435
M3 - Conference contribution
AN - SCOPUS:84934290936
T3 - 2014 IEEE Energy Conversion Congress and Exposition, ECCE 2014
SP - 499
EP - 504
BT - 2014 IEEE Energy Conversion Congress and Exposition, ECCE 2014
PB - Institute of Electrical and Electronics Engineers Inc.
ER -