中文摘要：

研制了用于电能质量监测系统中的大容量存储设备，提出了基于USB总线技术和Flash大容量存储技术的硬件系统结构，利用即插即用的USB快速接口传送波形数据，利用NAND Flash对数据进行可靠的保存。结合硬件体系结构和各种功能要求，从固件、设备驱动程序和用户应用程序3方面介绍了系统的软件设计。

英文摘要：

The design method of mass storage device in power quality meter was introduced and the system structure based on the technology of USB bus and Flash mass storage was presented, which transfer wave data rapidly by PNP USB interface and save the data credibly by NAND Flash. According to the hardware system and every kind of demand, the design method of software, including the firmware, device driver and user application program, was also presented,