基于DSP+ARM+μC/OS-Ⅱ的线路保护装置研究

Research of the Line-Protection Equipment Based on DSP+ARM+μC/OS-Ⅱ

针对传统微机保护不能满足现代电网发展的智能化与自动化的要求,研制了一台基于μC/OS-Ⅱ实时操作系统的DSP+ARM模式线路保护装置。以TI公司的DSP芯片来完成保护装置的数据采集、数据处理等核心功能;以ATMEL公司的ARM芯片来实现人机接口、通信等控制功能。将DSP+ARM双核硬件平台实施模块化设计,并将μC/OS-Ⅱ实时操作系统移植到ARM芯片上。采用该新型线路保护装置,以单相接地区内故障为例的测试结果表明:该新型保护装置的采样精度达到0.2级,保护动作可靠,性能完全可以满足现代电网的发展需求。

This paper designed the microcomputer protection based on DSP and ARM under the μC /OS-II to meet the requirement as traditional microcomputer protection can ’ t satisfy the stable operation of the modem intelligent power grid. TI’s DSP is used for the protecter ’ s data collection,data processing function. ATMEL ’ s ARM is used for the control to achieve human-machine interfaces and communication capabilities. The DSP ＋ ARM hardware platform is realized with modular design. In this system the operating system μC /OS-II is transplanted on ARM successfully. Taking the single-phase grounding protection of line-protection for example, the test results show that the sampling precision of hardware platform can reach 0. 2 grade, and it can satisfy the needs of practical engineering in the power system.