Control of direct driven offshore wind turbines in a DC-collection grid within the wind farms
Control of direct driven offshore wind turbines in a DC-collection grid within the wind farms
复制标题
风电场内直流收集电网中直接驱动海上风力涡轮机的控制
DOI：
10.1109/ptc.2011.6019223
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
T. Undeland
中科院分区：
文献类型：
--
作者：
S. Gjerde;T. Undeland
最近的研究是针对海上风电场的直流收集电网，并将高压直流连接到岸上。主要动机是减少转换步骤的数量，并避免与交流电缆相关的无功功率问题。然而，这需要改变风力涡轮机的控制系统，因为直流电网具有不同的特性，无论是关于电网本身，还是并网变流器的行为。本文研究了通过电压源变换器与直流集电电网连接的直驱风力发电机组的控制问题。更准确地说，采用了一种调节集网电压的控制方案，并对其进行了评估。通过EMTDC/PSCAD的模拟记录了这种行为，并讨论了操作策略的后果。
Recent research has been directed towards a DC-collection grid for offshore wind farms with an HVDC-connection to shore. The main motivation is to reduce the of number of conversion steps, and avoid the reactive power problem associated with AC-cables. However, this demands for changes in the control systems for the wind turbines, as DC-grids have different characteristics, both with regards to the grid itself, and the behavior of the grid-connected converters. The control of a direct driven wind turbine connected to a DC-collection grid through a voltage source converter is investigated in this paper. And more precisely, a control scheme for regulating the collection grid voltage is employed and evaluated. The behavior is documented through simulations in EMTDC/PSCAD and the consequences of the operation strategy are discussed.