基于DSP技术和小波理论的小电流接地系统故障选线装置的研究

Study on Non-effectively Grounded System Fault Line Detection Instrument Based on DSP and Wavelet Theory

着重研究了利用小波包变换提取故障信号的暂态高频分量,通过比较各馈线零序电流小波变换的模值来实现故障选线,并结合DSP技术,以TMS320VC33为核心,以模块化设计完成装置的开发,实现小电流接地系统的故障选线功能。

It focuses on extracting the transient high-frequency components from fault signals by using wavelet packet transform, and implementing fault line selection through comparing the modulus value of zero-sequence current wavelet packet transform in each feeder line. Combining with DSP technology, with TMS320VC33 as the core, it completes the development of devices through modular design, to carry through fault line selection function in the small current grounding system.