In this paper, a method is presented to control offshore wind farm output power. This method is able to fix the wind farm output power even during wind speed variations. In the proposed method, the offshore wind farm is connected to the onshore grid through the high-voltage dc (HVdc) cable. Moreover, the power control of the wind turbines is achieved by controlling the HVdc convertors. In the proposed system, the generator side convertors have to control the active power absorbed from the wind, and the grid side ones are obtained to control the HVdc link voltage. The control system is based on applying the appropriate modulation index to the voltage source converters. Two control strategies are proposed and analyzed to control wind farm output power. The simulation results illustrate that the proposed method is able to smooth the output power of the offshore wind farms appropriately. The proposed wind farm configuration and the control system are validated by simulations in the MATLAB/Simulink environment.

中文翻译：

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使用 HVdc 链路的海上风电场功率控制

在本文中，提出了一种控制海上风电场输出功率的方法。即使在风速变化期间，该方法也能够固定风电场输出功率。在所提出的方法中，海上风电场通过高压直流 (HVdc) 电缆连接到陆上电网。此外，风力涡轮机的功率控制是通过控制 HVdc 转换器来实现的。在所提出的系统中，发电机侧变流器必须控制从风中吸收的有功功率，而获得电网侧变流器来控制 HVdc 链路电压。控制系统基于对电压源转换器应用适当的调制指数。提出并分析了两种控制策略来控制风电场输出功率。仿真结果表明，所提出的方法能够适当地平滑海上风电场的输出功率。建议的风电场配置和控制系统通过 MATLAB/Simulink 环境中的仿真进行验证。