DC Collection topology and Control for All-DC Offshore Wind Power System Considering Surplus Power Distribution

ZHAO Peiqi; MENG Yongqing; YANG Ziyue; GE Mengwei; WANG Xiuli; WANG Xifan; {{custom_author.name_en}}

doi:10.13334/j.0258-8013.pcsee.242585

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DC Collection topology and Control for All-DC Offshore Wind Power System Considering Surplus Power Distribution

更新时间：2026-10-12

- DC Collection topology and Control for All-DC Offshore Wind Power System Considering Surplus Power Distribution
- Vol. 46, Issue 6, Pages: 2241-2257(2026)
- 作者机构：
  
  陕西省智能电网重点实验室(西安交通大学电气工程学院),陕西省,西安市,710049
- 作者简介：
- 基金信息：
- DOI：10.13334/j.0258-8013.pcsee.242585
  CLC：
- Received：20 March 2026，
  
  Published：2026
- 稿件说明：
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ZHAO Peiqi, MENG Yongqing, YANG Ziyue, et al. DC Collection topology and Control for All-DC Offshore Wind Power System Considering Surplus Power Distribution[J]. 2026, 46(6): 2241-2257.
DOI：

ZHAO Peiqi, MENG Yongqing, YANG Ziyue, et al. DC Collection topology and Control for All-DC Offshore Wind Power System Considering Surplus Power Distribution[J]. 2026, 46(6): 2241-2257. DOI： 10.13334/j.0258-8013.pcsee.242585.

摘要

在海上风电场大规模、深远海化的发展下，海上风电全直流输电系统成为研究热点之一。该文针对海上风电全直流系统提出一种新型的串并联直流风电场汇集拓扑，包括中压直流风机的串并联机侧变换器拓扑设计，该拓扑用于减小子模块电容电压纹波，能够适用于中压大容量直流风机；针对串联风机容易出现的“弃风”问题，提出一种辅助功率平衡变换器，用于为串联风机间的盈余功率提供流通通道，从而使每台风机都能实现最大功率点跟踪运行；然后，针对所提出的新型海上风机全直流汇集拓扑，设计相应的控制策略与调制策略；最后，通过搭建Matlab/Simulink仿真模型，验证所提拓扑的可行性以及控制策略和调制策略的有效性。

Abstract

With the large-scale and far-reaching development of offshore wind farms

the offshore wind power all-DC transmission system has become one of the research hotspots. This article proposes a new series-parallel DC wind farm collection topology for offshore wind power all-DC systems

including series-parallel converter topology design for medium-voltage DC wind turbines to reduce submodule capacitor voltage ripple

which can be applied to medium-voltage large capacity DC wind turbines. Aiming at the problem of “wind abandonment” that is prone to occur in series wind turbines

a power balance converter is proposed to provide a flow path for the surplus power between series wind turbines

so that each wind turbine can achieve maximum power point tracking (MPPT) operation. Then

corresponding control and modulation strategies are designed for the proposed new offshore wind turbine full DC collection topology. Finally

the feasibility of the proposed topology and the effectiveness of the control and modulation strategies are verified through Matlab/Simulink simulation.

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