LMS自适应滤波器在雁淮特高压直流工程交流滤波器保护系统中的应用研究

Application and study of LMS adaptive filter in AC filter protection of Yan Huai UHVDC power transmission project

以雁淮直流输电工程交流滤波器保护系统的不平衡电流校正为研究对象,介绍了C1高压电容器组的结构和不平衡保护的原理。阐明了不平衡电流校正的重要性和意义,指出传统方法所使用的初始不平衡电流不充分考虑其相位和幅值的波动,将其作为恒定值是不合理的。针对初始不平衡电流的随机性,介绍了LMS自适应滤波器的原理和特性,并将其在HCM3000平台中进行了实现。研究并给出了滤波器关键参数,阐述了在具体工程应用中的使用方法。工程数据验证了设计的合理性和性能的优越性。

Taking the unbalanced current correction of AC filter protection system in Yan Huai HVDC project as the object of study,the structure of the high-voltage capacitor bank and the principle of unbalanced protection are introduced.The importance and significance of unbalanced current correction are clarified.It is unreasonable to point out that the initial unbalanced current used in the traditional method does not fully take into account the fluctuation of its phase and amplitude.In view of the randomness of the initial unbalanced current,the principle and characteristics of LMS adaptive filter are introduced,and its implementation in HCM3000 platform are given.The key parameters of filter are researched and given,and the method of application in specific engineering is expounded.The engineering data verify the rationality of the design and the superiority of the performance.