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首页> 外文期刊>Energies >Nonlinear Controllers Based on Exact Feedback Linearization for Series-Compensated DFIG-Based Wind Parks to Mitigate Sub-Synchronous Control Interaction
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Nonlinear Controllers Based on Exact Feedback Linearization for Series-Compensated DFIG-Based Wind Parks to Mitigate Sub-Synchronous Control Interaction

机译：基于精确反馈线性化的非线性控制器，用于基于串联补偿DFIG的风电场，用于缓解次同步控制相互作用

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The increasing penetration of wind power in the grid has driven the integration of wind farms with power systems that are series-compensated to enhance power transfer capability and dynamic stability. This may lead to sub-synchronous control interaction (SSCI) problems in series-compensated doubly-fed induction generator (DFIG)-based wind farms. To mitigate SSCI, nonlinear controllers based on exact feedback linearization (EFL) are proposed in this paper. Before deriving the control laws, the exact feedback linearizability of the studied system is scrutinized. Frequency scanning analysis is employed to test the designed EFL controllers. Moreover, the performance of the EFL controllers is compared to that of classical proportional-integral (PI) controllers. A series-compensated 100 MW DFIG-based wind park is utilized to assess the performance of the designed controllers through the alleviation of sub-synchronous resonance. Analyses of the studied system reveal that the resistance is negative under sub-synchronous frequency conditions, whereas the reactance becomes negative at approximately 44 Hz. The designed EFL controllers effectively alleviate SSCI and result in positive reactance and resistance values within the whole sub-synchronous frequency range. The results from the frequency scanning method are also validated through the time domain simulation and the eigenvalue analysis.
机译：风力在电网中的渗透率不断提高，推动了风电场与电力系统的集成，电力系统经过串联补偿，以增强电力传输能力和动态稳定性。这可能会导致基于串联补偿的双馈感应发电机（DFIG）的风电场出现次同步控制交互（SSCI）问题。为了减轻SSCI，本文提出了基于精确反馈线性化（EFL）的非线性控制器。在得出控制律之前，要仔细研究所研究系统的精确反馈线性度。频率扫描分析用于测试设计的EFL控制器。此外，将EFL控制器的性能与经典比例积分（PI）控制器的性能进行了比较。基于串联补偿的100 MW DFIG风电场用于缓解次同步谐振，从而评估了所设计控制器的性能。对所研究系统的分析表明，在亚同步频率条件下电阻为负，而电抗在大约44 Hz时变为负。设计的EFL控制器可有效缓解SSCI，并在整个次同步频率范围内产生正电抗和电阻值。频率扫描方法的结果也通过时域仿真和特征值分析得到了验证。

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