基于小波分析的电动机综合保护器设计  

Design of motor comprehensive protector based on wavelet analysis

作　　者：雷乃清[1] 许钰婷 

机构地区：[1]河南理工大学电气工程与自动化学院,河南焦作454150

出　　处：《电力系统保护与控制》2015年第12期129-133,共5页Power System Protection and Control

摘　　要：为了准确得到电动机采样信号的有效值,对电动机进行正确保护,介绍了一种基于小波分析的电动机综合保护器设计。该设计包括电动机保护算法、关键的软硬件设计。算法上,采用小波分析,可以抑制衰减的直流分量和非整次谐波分量,弥补傅立叶算法的不足,为电动机保护提供保证。软件上,采用μC/OS-II操作系统对各个任务进行调度管理,让这些任务可以并发工作,提高系统的实时性。硬件上,设计了以太网接口,满足电动机保护智能化、网络化的要求。实践表明,该保护器能较好地实现电动机保护,具有一定的现实意义。In order to obtain the effective values of motor sampled signal accurately, for proper protection of motor, this paper introduces a design of motor comprehensive protector based on wavelet analysis. The design includes the motor protection algorithm and key design of hardware and software. On the algorithm side, it uses wavelet analysis, the components of damped DC and noninteger harmonics are restrained by the wavelet analysis. The wavelet analysis remedies the deficiency of Fourier algorithm and provides assurance for motor protection. On the software side, it uses theμC/OS-II operating system and manages every task, so these tasks can work simultaneously and thus the real-time performance of the system is improved. On the hardware side, it designs Ethernet interface to meet the intelligent and networked requirements of motor protection. Practice shows that the protector can realize motor protection effectively, which has certain practical significance.

关 键 词：小波分析 电动机保护 以太网 ΜC/OS-II操作系统 多任务调度 

分 类 号：TM307.3[电气工程—电机]