The increasing significance of regulating transient energy and efficiently clearing DC short-circuit faults accompanies the rapid growth of offshore wind power. To address limitations such as single functionality and low device utilization in DC energy dissipation devices in flexible HVDC transmission systems for offshore wind power, this paper researches the technology of transient energy regulation and reuse, and a hybrid chopper topology with fault energy absorption and reuse function is proposed. The topology's structure, control strategy, and design methodology for electrical parameters are defined. Simulation is employed to verify the electrical characteristics of the hybrid chopper topology and its performance in an offshore wind power grid-connected system. When compared to traditional regulation methods, the proposed topology-based approach offers the advantages of energy absorption and fault location function for various DC faults. This method effectively maximizes the utilization of DC fault energy, resulting in higher device utilization rates and a broader range of functionalities.

中文翻译：

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海上风电柔性直流输电暂态能量调节及再利用装置设计


随着海上风电的快速发展，调节暂态能量和有效清除直流短路故障的重要性日益凸显。针对海上风电柔性直流输电系统中直流消能装置功能单一、器件利用率低等问题，研究暂态能量调节与再利用技术以及具有故障能量吸收与再利用功能的混合斩波拓扑。被提议。定义了拓扑结构、控制策略和电气参数的设计方法。通过仿真验证了混合斩波拓扑的电气特性及其在海上风电并网系统中的性能。与传统的调节方法相比，所提出的基于拓扑的方法具有针对各种直流故障的能量吸收和故障定位功能的优点。该方法有效地最大化了直流故障能量的利用，从而提高了设备​​利用率和更广泛的功能。