【摘要】 首先介绍了高压直流输电工程中交/直流滤波器所用高压电容器组的结构特点及所配置电容器不平衡保护的原理,指出电容器固有初始不平衡电流传统的校正方法存在的不足。根据LMS最小均方自适应滤波器特性和H形接线电容器组固有不平衡电流物理特性具有一致性,提出了LMS最小均方自适应滤波算法在H形接线电容器组固有初始不平衡电流校正中的具体实现方法。通过仿真比较选定了1组有效的LMS自适应滤波器参数,并验证了LMS算法在电容器组固有初始不平衡电流校正中的有效性和实时性。更多还原

【Abstract】 In this paper,the structure feature of high voltage capacitor for AC/DC filter of HVDC project and capacitor imbalance protection principle capacitor are introduced firstly,and the drawback of conventional correction method of inherent initial imbalance current of the capacitor is pointed out. In accordnace with the consistency of the feature of LMS(least-mean-squares)adaptive filter and of physical feature of inherent imbalance current of H-type wiring capacitor bank,the specific achieving method of LMS adaptive filtering algorithum in the correction of inherent initial imbalance current of H type wiring capacitor bank is proposed. A set of effective LMS adaptive filter parameters is selected through simulation comparison and the effectiviness and instantaneity of LMS algorithum in the inherent initial imbalance current correction of capacitor bank are varified.更多还原