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海上风电场交流集电和多端柔直输电并网系统多目标优化规划

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集电和输电并网系统的优化规划对海上风电场(offshore wind farm,OWF)的投资经济性和运行可靠性有着重要影响.对于OWF中交流集电和多端柔直输电的并网方式,建立了拓扑与潮流耦合的兼顾经济性和可靠性的多目标优化规划模型.模型中利用拓扑冗余度直接近似计算风机停运损失电量,并考虑了新型双边环形的交流集电系统拓扑结构和基于连通性约束的多端柔直输电系统拓扑结构,实现了对集电和输电系统拓扑连接,交流和直流海底电缆类型,海上升压换流站数量、容量、位置,和连接到海上升压换流站馈线数量的协调优化规划.并且,提出了一种直接求解多目标优化问题折中最优解的方法,通过凸化处理将原混合整数非线性规划模型转化为混合整数凸二次规划模型,以高效求解获得最优规划方案.最后,对2个分别含36台和78台风机的实际OWF算例进行分析,验证了所提出模型和方法的正确有效性.
Multi-objective Optimal Planning for AC Electrical Collector and VSC-MTDC Transmission Grid-connected System of Offshore Wind Farms
The optimal planning of the electrical collector and transmission grid-connected system has a significant impact on the investment economy and operational reliability of the offshore wind farms(OWFs).For the AC electrical collector and the voltage source converter-based multi-terminal DC(VSC-MTDC)transmission grid-connected mode in the OWF,a multi-objective optimal planning model with topology and power flow coupling considering the economy and reliability is established.The proposed model uses the topological redundancy to directly approximate the electric energy loss caused by the wind turbine outage.It considers the topology of the AC electrical collector system with the new double-sided ring structure and the one of the VSC-MTDC transmission system based on the connectivity constraints,and realizes the optimal planning for the topology connection of the electrical collector and transmission system,the types of AC and DC submarine cables,the number,capacity and location of offshore step-up converter substations,and the number of feeders connected to offshore step-up converter substations.Moreover,a method for directly solving the compromise optimal solution(COS)of the multi-objective problems is proposed.The original mixed integer nonlinear programming(MINLP)model is transformed into a mixed integer convex quadratic programming(MICQP)model by convexity,which is solved efficiently to obtain the optimal planning scheme.Finally,two actual OWFs with 36 wind turbines and 78 wind turbines respectively are analyzed to verify the correctness and effectiveness of the proposed model and method.

offshore wind farmAC electrical collector systemvoltage source converter-based multi terminal DC transmission systemtopology optimizationmulti-objective optimal planning

梁宇涛、林舜江、冯祥勇、赖信、刘明波

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华南理工大学电力学院,广东省广州市 510640

广东省绿色能源技术重点实验室(华南理工大学),广东省广州市 510630

海上风电场 交流集电系统 多端柔直输电系统 拓扑优化 多目标优化规划

国家自然科学基金广东省重点领域研发计划广东省自然科学基金

519770802021B01012300042023A1515240075

2024

10.13335/j.1000-3673.pst.2023.0860

电网技术
国家电网公司

电网技术

CSTPCD北大核心
影响因子：2.821
ISSN：1000-3673
年,卷(期)：2024.48(6)
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