Abstract ▼ AI-Helper

While interest in the DC distribution network has been picking up in response to changes of technical and social environment caused by rapid increase of digital loads and expansion of new renewable energy resources, some problems about the DC distribution network stability have been brought out cons...

While interest in the DC distribution network has been picking up in response to changes of technical and social environment caused by rapid increase of digital loads and expansion of new renewable energy resources, some problems about the DC distribution network stability have been brought out consistently. In particular, a leakage current from ground fault, short-circuit accident, insulation failure, lightning, arc and others, may occur serious problems, such as human body electric shock, equipment damage, standstill or malfunction. Thus, development of a newt ype of leakage current detector is required because it is impossible to use a current detector(ZCT) in the alternating current system. In this paper, we have designed hardware by using HCT which can detect a leakage current with the purpose of syntagmatic protection of human and equipment in the DC distribution under TN ground system, and proposed a possible operation algorithm which can work separately depending on the leakage current pattern of human body electric shock and equipment ground fault. This leakage current detector has proved that it can secure stability of electric power supply for major appliances by operating insensitive against noise currents, and simultaneously protect lives by operating sensitive against human body electric shock.

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