TY - JOUR
T1 - Coordinated direct current matching control strategy for multi-terminal DC transmission systems with integrated wind farms
AU - Zhu, Jiebei
AU - Booth, Campbell D.
AU - Adam, Grain P.
AU - Roscoe, Andrew J.
PY - 2015/7
Y1 - 2015/7
N2 - A new Direct Current Matching Control (DCMC) scheme is proposed in this paper. The scheme is ideally suited for the integration of a large number of wind farms with AC grid systems via a multi-terminal HVDC (MTDC) network incorporating several grid-side converters. The proposed DCMC, which matches, in a near-instantaneous fashion, the cumulative injected DC currents from all wind farms with the total of the output DC currents to the AC grids (via inverters) by communicating real-time data between all terminals, is an improvement upon and potential replacement for conventional DC voltage droop and master-slave control strategies. Through the utilization of a wide-area Supervisory Control And Data Acquisition (WA-SCADA) System, the proposed DCMC aims to enhance MTDC network voltage stability and facilitate flexible power dispatch to the supplied AC grids, while maximizing the total amount of generated wind power and offering more flexibility in terms of the ability for wind farms to independently control and maximize their outputs without any requirement for output to be constrained. A six-terminal MTDC system connecting three wind farms to three independent mainland AC grids is used to validate the proposed DCMC and compare its performance with conventional control strategies, Two simulation studies are carried out to test and verify the DCMC.
AB - A new Direct Current Matching Control (DCMC) scheme is proposed in this paper. The scheme is ideally suited for the integration of a large number of wind farms with AC grid systems via a multi-terminal HVDC (MTDC) network incorporating several grid-side converters. The proposed DCMC, which matches, in a near-instantaneous fashion, the cumulative injected DC currents from all wind farms with the total of the output DC currents to the AC grids (via inverters) by communicating real-time data between all terminals, is an improvement upon and potential replacement for conventional DC voltage droop and master-slave control strategies. Through the utilization of a wide-area Supervisory Control And Data Acquisition (WA-SCADA) System, the proposed DCMC aims to enhance MTDC network voltage stability and facilitate flexible power dispatch to the supplied AC grids, while maximizing the total amount of generated wind power and offering more flexibility in terms of the ability for wind farms to independently control and maximize their outputs without any requirement for output to be constrained. A six-terminal MTDC system connecting three wind farms to three independent mainland AC grids is used to validate the proposed DCMC and compare its performance with conventional control strategies, Two simulation studies are carried out to test and verify the DCMC.
KW - multi-terminal HVDC transmission systems
KW - voltage source converter
KW - offshore
KW - wind farm
KW - DC grid operation
UR - http://www.sciencedirect.com/science/article/pii/S0378779615000553
UR - http://www.sciencedirect.com/science/journal/03787796
U2 - 10.1016/j.epsr.2015.02.015
DO - 10.1016/j.epsr.2015.02.015
M3 - Article
SN - 0378-7796
VL - 124
SP - 55
EP - 64
JO - Electric Power Systems Research
JF - Electric Power Systems Research
ER -