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The introduction of DG in distribution system will deteriorate selectivity and sensitivity of the existing relay. This paper presents a novel method based on negative sequence current (I2) scalar product (I2SP) to identify the direction of an asymmetrical fault. And by combining fault direction distinguishing methods with communication system, a new asymmetrical fault line searching and locating scheme...
The introduction of DG in distribution system has many negative impacts on conventional protection. Typically it will deteriorate selectivity and sensitivity of existing relay. It will change a simple radiation distribution system with single source into a complex multi-source system. To make the nowadays broadly used protection scheme and their coordination meet the great challenge, this paper proposed...
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