According to the influence of loop net on DC system fault detection, this paper presents a new idea based on Fractal theory to study how Fractal can identify the loop net fault.
针对直流系统中环网对接地故障检测的影响，提出利用分形的思想，初探性研究分形对环网故障的识别。
The firth chapter was built on harmonic fundamental concepts, harmonic harm and influence, and then described the present condition and significance of harmonic study fault data recording.
第一章主要介绍谐波的基本概念，谐波的危害及谐波问题与故障录波装置的研究现状。
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