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The detection and fast clearance of faults in the HVDC lines are important. A traveling wave protection scheme for a bi-polar HVDC line is proposed in this paper. The identification of internal and external faults is based on the magnitude comparison criteria of the backward and forward travelling waves detected at the relay location. The modal analysis(More)
The formation of the transient capacitive current and its effects on the HVDC transmission line differential protection is analyzed based on the wave propagation principle in this paper. The magnitude of capacitive current in the transient process of DC line fault is directly proportional to the time difference of fault signal travelling to both terminals(More)
This paper introduces the basic structure of multi-agent based protection system for distribution system with DGs. The entire system consists of intelligent agents and communication system. Intelligent agents can be divided into three layers, the bottom layer, the middle layer and the upper layer. The design of the agent in different layer is analyzed in(More)
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