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The benefits offered by the DC energy distribution in different applications raised the interests towards new power architectures and apparatus. The availability of the related LV and MV apparatus and protection schemes is in fact crucial to fully exploit the opportunities opened in the energy management for the smart grid. Experimental results of testing DC circuit breakers based upon current injection...
Wavelet analysis based analog circuit fault detecting sensitivity and feature extraction optimization methods are studied. Good localization on time-frequency domain of wavelet transformation provides better feature representation for faulty circuits than unitary time or frequency domain analysis. However, different wavelets express diverse resolution for fault recognition. Root mean square (RMS)...
This paper gives an overview on issues and challenges of DC shipboard distribution protection. Typical fault characteristics in DC shipboard distribution systems are determined by different sources at DC faults. Issues in protection design include fast and accurate fault current estimation, fast and selective fault location methods, and effective fault current control. One main challenge in practical...
This paper presents the behavior analysis of Modular Multilevel Converter (MMC) under DC pole-to-pole (PtP) Short-Circuit (SC) fault, which is an important issue in fault management, electrical system design and MMC based power system protection and control. Firstly, the transient behavior is analyzed where the conduction overlapping angle γ is defined. Secondly, seven possible SC current paths induced...
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