基于状态相关Riccati方程的双馈风机控制
发布时间：2018-08-31 19:26
【摘要】：国家标准对并网风机在故障期间的低电压穿越能力提出了技术要求,即能在电压跌落一定范围内不脱网运行,并提供动态无功支撑。为了提高双馈风电机组的低电压穿越能力,提出了基于状态相关Riccati方程(state-dependent Riccati equation,SDRE)的控制器。SDRE控制器具有灵活的设计方式,可以通过实时优化状态相关系数矩阵,提升暂态响应性能,实现被控对象在较大范围内的渐近稳定。针对双馈风电机组设计了SDRE控制器,并通过与Crowbar的配合,实现了符合国家标准的低压故障穿越策略。通过算例系统在三相故障下的仿真,验证了所提控制策略相比常规PI控制策略以及故障期间持续投入Crowbar的策略,能够更好地实现低电压穿越。
[Abstract]:The national standard puts forward the technical requirements for the low voltage traversing ability of grid-connected fan during the fault period, that is, it can run within a certain range of voltage drop and provide dynamic reactive power support. In order to improve the low voltage traversing ability of doubly-fed wind turbine, a state dependent Riccati equation (state-dependent Riccati equation,SDRE) based controller. SDRE controller has a flexible design method, which can optimize the state correlation coefficient matrix in real time. The transient response performance is improved to achieve the asymptotic stability of the controlled object in a wide range. The SDRE controller is designed for doubly-fed wind turbine, and the low voltage fault traversing strategy is realized by cooperating with Crowbar. The simulation results show that the proposed control strategy can achieve low voltage traversing better than the conventional PI control strategy and the strategy of continuously putting Crowbar into the fault period.
【作者单位】： 电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系);西安交通大学电气工程学院;陕西省地方电力设计研究院;
【基金】：国家自然科学基金委创新群体项目(51621065) 国家重点基础研究发展计划项目(973项目)(2013CB228201)~~
【分类号】：TM315
，
本文编号：2215938
[Abstract]:The national standard puts forward the technical requirements for the low voltage traversing ability of grid-connected fan during the fault period, that is, it can run within a certain range of voltage drop and provide dynamic reactive power support. In order to improve the low voltage traversing ability of doubly-fed wind turbine, a state dependent Riccati equation (state-dependent Riccati equation,SDRE) based controller. SDRE controller has a flexible design method, which can optimize the state correlation coefficient matrix in real time. The transient response performance is improved to achieve the asymptotic stability of the controlled object in a wide range. The SDRE controller is designed for doubly-fed wind turbine, and the low voltage fault traversing strategy is realized by cooperating with Crowbar. The simulation results show that the proposed control strategy can achieve low voltage traversing better than the conventional PI control strategy and the strategy of continuously putting Crowbar into the fault period.
【作者单位】： 电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系);西安交通大学电气工程学院;陕西省地方电力设计研究院;
【基金】：国家自然科学基金委创新群体项目(51621065) 国家重点基础研究发展计划项目(973项目)(2013CB228201)~~
【分类号】：TM315
，
本文编号：2215938
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