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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...
Nowadays, with more and more renewable energy sources connecting to the radial distribution network, the coordination of over-current relays might be lost. Instead of improving the traditional protection method of the distribution system, this paper proposes a novel protection scheme which can be used in the system with high DG penetration, characterized by DG participating in fault location. Proposed...
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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