도시철도 레일전위상승과 누설전류의 해석

초록

In DC transit power system, two technical problems need to be studied throughly. These are rail potential rise problem and the stray current problem. DC traction power supply system is operated ungrounded to minimize the stray current. This causes rail potential increase and makes hazardous condition to the person in touch with running rails. To prevent the hazardous condition, maximum allowable limits on rail potential rise are set by regulations in advanced foreign countries. In this paper, the simplified calculation methods for the rail potential rise and the stray currents as well as the modeling of the leakage resistance for the computer analysis are discussed.