Sub-Synchronous Interaction Damping Control for DFIG Wind Turbines
Sub-Synchronous Interaction Damping Control for DFIG Wind Turbines
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DOI：
10.1109/tpwrs.2014.2327197
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发表时间：
2015-01-01
影响因子：
6.6
通讯作者：
Solsona, Jorge A.
中科院分区：
文献类型：
--
作者：
Leon, Andres E.;Solsona, Jorge A.
提出了一种抑制串补双馈风力发电机组次同步干扰(SSI)的阻尼控制方法。由于最近在位于串联电容器附近的DFIG风电场报告了SSI现象，这个问题引起了人们的关注。比较了两种附加阻尼控制信号的方法：一种是集成到网侧变流器上，另一种是集成到转子侧变流器上。SSI阻尼器的设计采用多输入多输出状态空间方法。这允许使用多个测量和控制输入来轻松调整高性能控制器。文中还讨论了小干扰和大干扰的稳定性分析、鲁棒性问题、附加控制对系统模式的影响以及不同运行条件对SSI的影响。结果表明，通过对现有的DFIG控制系统进行更新，在不增加昂贵的附加减振装置的情况下，附加控制能够适当地抑制DFIG风力机的次同步振荡，降低了风电跳闸的风险。
This paper presents a damping control to mitigate sub-synchronous interactions (SSI) in doubly-fed induction generator (DFIG) wind turbines connected to series-compensated lines. This issue has gained attention due to the recent SSI phenomena reported in DFIG wind farms located near series capacitors. Two approaches which add a supplementary damping control signal are compared: one of them, integrated to the grid-side converter, and the other one, to the rotor-side converter. The SSI damping controls are designed using a multi-input multi-output state-space methodology. This allows to easily tune a high performance controller using several measurements and control inputs. Small- and large-signal stability analyses, robustness aspects, impact of the supplementary controls on the system modes, and influence of different operating conditions on the SSI are also discussed. The obtained results show that the supplementary control is able to properly damp the sub-synchronous oscillations of DFIG wind turbines by updating the existing DFIG control systems without the inclusion of expensive additional damping devices, and reducing the risk of wind generation tripping.