Light-duty offshore wind power system has been a research hotspot in recent years. The diode rectifier based HVDC scheme is a promising solution and has attracted more and more attention. In this paper, a self-synchronizing control for offshore wind farms connected to diode rectifier based HVDC system is proposed. The active power of each wind turbine is controlled by regulating the amplitude of the AC voltage, while the reactive power is used to adjust the offshore frequency. The proposed control is a decentralized scheme. Thus, no communication network or GPS is required and only the local information is used in the control system. The synchronization of wind turbines is achieved by the proposed self-synchronizing frequency control instead of using phase-lock loop. Besides, in order to make offshore wind farms provide necessary frequency support to the onshore power system, a communication-less frequency regulation scheme with artificial coupling method is proposed. The feasibility and effectiveness of the proposed self-synchronizing control and frequency regulation scheme are verified through simulation studies in PSCAD/EMTDC platform.

中文翻译：

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连接至基于二极管整流器的高压直流系统的海上风电场的自同步控制和频率响应


轻型海上风电系统是近年来的研究热点。基于二极管整流器的高压直流输电方案是一种很有前景的解决方案，并引起了越来越多的关注。本文提出了一种连接基于二极管整流器的高压直流输电系统的海上风电场的自同步控制。每台风力发电机的有功功率通过调节交流电压的幅值来控制，而无功功率则用于调节海上频率。所提出的控制是一种分散的方案。因此，不需要通信网络或GPS，控制系统中仅使用本地信息。风力涡轮机的同步是通过所提出的自同步频率控制而不是使用锁相环来实现的。此外，为了使海上风电场为陆上电力系统提供必要的频率支持，提出了一种人工耦合方法的无通信调频方案。通过PSCAD/EMTDC平台的仿真研究验证了所提出的自同步控制和频率调节方案的可行性和有效性。