通过构建模型的方式解决双馈感应发电机并入电力系统中存在的非线性功率振荡问题,提出一种具有非线性和鲁棒性的新型功率振荡阻尼控制器,以减小此类系统中的功率振荡。首先,结合双馈感应发电机特性,构造含风电电力系统的能量函数模型。其次,根据构建的稳定流形构建滑模面,对于建模和仿真过程中存在的一些误差和外部干扰,采用扩展状态观测器进行估计。最后,基于扩展状态观测器、滑模变结构控制理论、能量函数设计双馈感应发电机的功率振荡阻尼控制器,并在四机两区系统中验证该方法的有效性。
Abstract
In order to solve the nonlinear power oscillation problem in doubly-fed induction generators when they are integrated into power systems, a power oscillation damping controller featuring nonlinearity and robustness is proposed to reduce the power oscillation . Firstly, the energy function model of the power system containing wind power is constructed by factoring in the characteristics of the doubly-fed induction generator. Secondly, the sliding mode surface is created based on the constructed stable flow form. In this phase, a few errors and external disturbances in the modeling and simulation process are estimated with the use of an extended state observer. Finally, the power oscillation damping controller of the doubly-fed induction generator is designed based on three factors： the extended state observer, the sliding-mode variable structure control theory, and the energy function. The proposed method effectiveness is verified through the four-machine two-area test system.
关键词
风电机组 /
双馈感应发电机 /
系统稳定性 /
可再生能源 /
滑模控制 /
能量函数 /
功率振荡
Key words
wind turbines /
DFIG /
system stability /
renewable energy resources /
sliding mode control /
energy function /
power oscillation
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基金
国家自然科学基金青年基金项目（52007027); 吉林省教育厅科学研究项目（JJKH20210092KJ）; 吉林市科技创新发展计划项目（20210103093）
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