A combined fault ride-through and power smoothing control method for full-converter wind turbines employing Supercapacitor Energy Storage System
A combined fault ride-through and power smoothing control method for full-converter wind turbines employing Supercapacitor Energy Storage System
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DOI：
10.1016/j.epsr.2013.08.007
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发表时间：
2014
影响因子：
3.9
通讯作者：
S. Gkavanoudis;C. Demoulias
中科院分区：
文献类型：
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作者：
S. Gkavanoudis;C. Demoulias
随着风力发电装置数量的增加，要求风力涡轮机发电机（WTG）具有故障穿越（FRT）能力。最近开发的电网运行规范要求WTG在故障条件下保持连接，支持电网更快地恢复到正常状态。然而，强制WTG在电网故障期间保持连接会对传统保护装置产生影响，因为它们可能对过电流和短路视而不见。本文提出了一种新的控制算法与功率管理方法相结合，它满足的要求，保持风力发电机连接到电网在故障期间，但断开风力发电机故障时坚持。在电网故障期间产生的能量存储在超级电容器储能系统（SCESS）中。此外，SCESS还用于平滑中频风电波动，提供高质量的功率分布。在一台2 MW外励磁同步发电机上进行的仿真结果表明，所提出的功率管理方法是有效的。
As the wind power installations are increasing in number, Wind Turbine Generators (WTG) are required to have Fault Ride-Through (FRT) capabilities. Lately developed grid operating codes demand the WTGs to stay connected during fault conditions, supporting the grid to recover faster back to its normal state. However, forcing a WTG to remain connected during a grid fault has consequences on the conventional protection devices, as they might become blind to over-currents and short circuits. This paper proposes a new control algorithm combined with a power management method, which fulfills the demand to keep the WTG connected to the grid during a fault, but disconnects the WTG when the fault insists. The energy generated while riding through a grid fault, is stored in a Supercapacitor Energy Storage System (SCESS). Furthermore, the SCESS is exploited for smoothing medium frequency wind power fluctuations, providing a high quality power profile. The simulation results which are performed on a 2 MW synchronous generator with external excitation, verify strongly the proposed power management method.