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自同步电压源双馈感应风力发电机组的软并网控制策略

Soft grid integration control strategy for self synchronized voltage source DFIG wind turbine generator.

作者信息

Shao Haoshu, Dong Qiang, Song Zenglu, Wang Yong

机构信息

School of Electrical Engineering, Nanjing Vocational University of Industry Technology, Nanjing, 210023, China.

出版信息

Sci Rep. 2025 Jan 4;15(1):839. doi: 10.1038/s41598-024-84378-0.

DOI:10.1038/s41598-024-84378-0
PMID:39755903
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11700084/
Abstract

Transitioning to a power system heavily reliant on renewable wind energy involves more than just replacing conventional fossil-fuel-based power plant with wind farms, the wind energy must be able to meet the requirement of voltage establishment and power balance. It is believed that the self synchronized voltage source control of DFIG wind turbine generator is one of the possible solutions to realize virtual inertia and is helpful to increase the frequency stability of power system, thus is meaningful in the transformation of the power system dominated by renewable energy. Plenty of research has been conducted on the self synchronized voltage source control strategy in steady state, but few research is focused on the soft grid integration, which is a complicated process involving wind turbine control and power converter control. This paper proposes a novel soft grid integration control strategy for self synchronized voltage source wind turbine generator, including the mechanical start-up and electrical start-up process, with the coordination of pre-synchronization control of DFIG rotor side converter and grid side converter, the integration current of DFIG WTG can be significantly reduced. The effectiveness of proposed soft grid integration control strategy is verified on Real-time Digital Simulator.

摘要

向严重依赖可再生风能的电力系统过渡,不仅仅是用风电场取代传统的化石燃料发电厂,风能还必须能够满足电压建立和功率平衡的要求。人们认为,双馈感应风力发电机的自同步电压源控制是实现虚拟惯性的可能解决方案之一,有助于提高电力系统的频率稳定性,因此在可再生能源主导的电力系统转型中具有重要意义。针对自同步电压源控制策略在稳态方面已经进行了大量研究,但很少有研究聚焦于软并网,这是一个涉及风力涡轮机控制和功率变换器控制的复杂过程。本文提出了一种用于自同步电压源风力发电机的新型软并网控制策略,包括机械启动和电气启动过程,通过双馈感应发电机转子侧变换器和网侧变换器的预同步控制协调,可以显著降低双馈感应风力发电机组的并网电流。所提出的软并网控制策略的有效性在实时数字仿真器上得到了验证。

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本文引用的文献

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ISA Trans. 2023 Dec;143:503-524. doi: 10.1016/j.isatra.2023.09.033. Epub 2023 Oct 4.