首页|Convexification of Hybrid AC-DC Optimal Power Flow with Line-commutated Converters

Convexification of Hybrid AC-DC Optimal Power Flow with Line-commutated Converters

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Line-commutated converter(LCC)-based high-voltage DC(HVDC)systems have been integrated with bulk AC power grids for interregional transmission of renewable power.The nonlinear LCC model brings additional nonconvexity to optimal power flow(OPF)of hybrid AC-DC power grids.A convexification method for the LCC station model could address such nonconvexity but has rarely been discussed.We devise an equivalent reformulation for classical LCC station models that facilitates second-order cone convex relaxation for the OPF of LCC-based AC-DC power grids.We also propose sufficient conditions for exactness of convex relaxation with its proof.Equivalence of the proposed LCC station models and properties,exactness,and effectiveness of convex relaxation are verified using four numerical simulations.Simulation results demonstrate a globally optimal solution of the original OPF can be efficiently obtained from relaxed model.

AC-DC power systemconvex relaxationline-commutated converteroptimal power flowsecond-order cone programming

Hongyuan Liang、Zhigang Li、J.H.Zheng、Q.H.Wu

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School of Electric Power Engineering,South China University of Technology,Guangzhou 510641,China

国家自然科学基金中央高校基本科研业务费专项Science and Technology Program of Guizhou Power Grid Coorpera-tion

521770862023ZYGXZR063GZKJXM20222386

2024

10.17775/CSEEJPES.2022.05250

中国电机工程学会电力与能源系统学报(英文版)
中国电机工程学会

中国电机工程学会电力与能源系统学报(英文版)

CSTPCDEI
ISSN：2096-0042
年,卷(期)：2024.10(2)
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