线性扩张状态观测器和李雅普诺夫直接法在风电场同步稳定控制的应用

发布时间：2018-04-10 20:57

本文选题：等效可控系统 + 线性扩张状态观测器　；参考：《中国电机工程学报》2017年11期

【摘要】：基于线性扩张状态观测器和李雅普诺夫(Lyapunov)直接法设计了风电场同步稳定控制策略,驱动系统达到故障后平衡点。首先将含有风电场接入的电力系统建模为串级系统,利用串级控制理论设计风电场稳定控制策略。其中,同步机为第一级,风电场为第二级子系统。针对同步机子系统,通过等效可控变换将多机系统转化为风电场等效可控系统,利用线性扩张状态观测器和Lyapunov直接法设计了改善系统同步稳定性的虚拟控制律。针对风电场子系统,基于线性扩张状态观测器设计了风电场的稳定控制律,使风电场功率调制能够快速跟踪虚拟控制律。控制策略无需系统的详细模型信息,具有良好的鲁棒性。在改进的IEEE39节点系统中,验证了控制策略的有效性和鲁棒性。
[Abstract]:Based on the linear extended state observer and Lyapunov Lyapunov-direct method, the synchronous stability control strategy of wind farm is designed, and the driving system reaches the equilibrium point after failure.Firstly, the power system with wind farm connection is modeled as cascade system, and the stable control strategy of wind farm is designed by using cascade control theory.Among them, synchronous machine is the first stage, wind farm is the second sub-system.For the synchronous machine subsystem, the multi-machine system is transformed into the wind farm equivalent controllable system by equivalent controllable transformation. The virtual control law to improve the synchronization stability of the system is designed by using the linear extended state observer and Lyapunov direct method.For the wind farm subsystem, the stability control law of wind farm is designed based on linear extended state observer, which makes the power modulation of wind farm track the virtual control law quickly.The control strategy does not need the detailed model information of the system and has good robustness.The effectiveness and robustness of the control strategy are verified in the improved IEEE39 node system.
【作者单位】：华南理工大学电力学院;
【基金】：国家重点基础研究发展计划项目(973项目)(2012CB215104)~~
【分类号】：TM614

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