Calculation methods for the rail potential rise and the stray current in the ungrounded DC traction system

비접지 급전시스템에서의 레일전위상승과 누설전류 계산

DC traction power 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 are discussed.