考虑磁体热稳定性的超导磁储能系统控制研究毕业论文.docx

分类号 学号 学校代码 密级 硕士学位论文考虑磁体热稳定性的超导磁储能系统控制研究学位申请人：学科专业：电气工程指导教师： 副教授答辩日期：年 月 日摘要储能装置能够灵活地与系统进行功率交换，在电力系统控制、新能源并网、用户侧响应等方面都有着广泛的应用。超导磁储能系统（Superconducting Magnetic Energy Storage：SMES）具有快速的响应能力和较高的功率密度，是一种具有广阔前景的储能方式。然而，SMES的推广应用还存在着部分技术问题尚未解决，SMES的经济性、可靠性等问题制约了SMES的进一步应用。另外，SMES作为一种新的控制手段，还需要深入研究它在电力系统中的作用机理。本文的研究内容包括三个部分：一是研究SMES用于改善系统小干扰稳定性，分析了SMES输出的有功功率、无功功率与发电机相互作用的机理，设计了基于模糊状态观测器的阻尼控制器；二是建立了用于超导磁体热稳定性评估的时序神经网络模型，并以SMES的制冷功率优化为例验证了该模型的在进行超导磁体热稳定分析时的有效性；三是研究了超导磁体的热稳定控制，分析了超导磁体热稳定特性和功率特性与超导磁体运行电流的关系，并据此提出了基于模糊逻辑的SMES运行电流控制策略。本文的主要创新点包括：在T-S模型下，设计了基于模糊状态观测器的阻尼控制器，该控制器能够很好地考虑系统非线性，且设计思路简单，适合复杂的大型系统；建立了用于超导磁体热稳定性评估的时序神经网络模型，该模型能够迅速地对超导磁体热稳定性进行分析，解决了传统电磁热仿真耗时太长的问题；提出了基于模糊控制的SMES运行电流调整策略，该控制策略根据磁体的实时运行电流以及运行温度对SMES的输出功率进行调整，有效地改善了超导磁体运行时的热稳定性与可靠性。关键词：SMES；小干扰稳定性；超导磁体热稳定性；电流调整；神经网络；模糊控制AbstractEnergy storage devices are widely used in power system control, integration of renewable energy, user-side response and so on. With fast response characteristics and high power density, Superconducting Magnetic Energy Storage (SMES) has a broad prospect in the future power system. However, there are still some technology problems to be solved about the application of SMES. The economy and reliability problems of SMES restrict the further application of it. In addition, as a new control method, the action mechanism of SMES in power system also needs to be further studied.The research of this paper includes three parts. Firstly, the application of SMES in improving small disturbance stability of power system is studied. The relationship between active power output of SMES and generators are analyzed. A damping controller based on fuzzy state observer is designed as well. Secondly, a thermal stability analysis model of superconducting magnet based on time series neutral network is established. The model can be used to analyze the thermal stability of superconducting magnet with different cooling power at different operating conditions. At last, thermal stability control of SMES