Abstract A decentralized voltage control (DVC) scheme based on the gradient projection (GP) method is proposed for the wind farm (WF). The wind farm controller optimizes the reactive power output of doubly-fed induction generator (DFIG)-based wind turbines (WTs) and static synchronous compensator (STATCOM) at the medium voltage (MV) side of the step-up transformer. The aim is to keep voltages of all buses in the wind farm within the feasible range and maintain a certain reactive power margin for WTs. The solution method based on the GP method is developed to solve the voltage control optimization problem in a decentralized manner without a central controller or communication between local controllers, which achieves optimal voltage control and greatly saves communication costs. A WF with 1 STATCOM and 40 wind turbine generators (WTGs) was used to validate the control performance of the proposed DVC scheme. The case study results demonstrate that the proposed decentralized voltage control can achieve optimal voltage control without the central controller or communication between local controllers under both normal operation and disturbances.

中文翻译：

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基于梯度投影法的风电场分散电压控制

摘要 针对风电场（WF）提出了一种基于梯度投影（GP）方法的分散式电压控制（DVC）方案。风电场控制器优化基于双馈感应发电机 (DFIG) 的风力涡轮机 (WT) 和升压变压器中压 (MV) 侧的静态同步补偿器 (STATCOM) 的无功功率输出。目的是将风电场所有母线的电压保持在可行范围内，并为WT保持一定的无功裕度。开发了基于GP方法的求解方法，以分散的方式解决电压控制优化问题，无需中央控制器或本地控制器之间的通信，实现了最优电压控制，大大节省了通信成本。带有 1 个 STATCOM 和 40 个风力涡轮发电机 (WTG) 的 WF 用于验证所提出的 DVC 方案的控制性能。案例研究结果表明，在正常运行和干扰下，所提出的分散式电压控制可以在没有中央控制器或本地控制器之间通信的情况下实现最佳电压控制。