CALCULATION METHOD AND ITS CALCULATION DEVICE OF VOLTAGE/POWER OF AC FEEDING CIRCUIT

摘要

PROBLEM TO BE SOLVED: To provide a calculation method of a voltage/power of an AC feeding circuit capable of calculating the voltage/power at each node of the feeding circuit in a state including a circuit constant of a three-phase power line at the receiving power side of the AC feeding circuit connecting two sets of single-phase ACs by three-phase-two-phase conversion for every feeding section. SOLUTION: A nonlinear circuit equation is created based on a nonlinear equivalent circuit combining an equivalent circuit of the circuit equation and two-phase AC side feeding circuit based on the equivalent circuit of three-phase AC side with a train load positioning in the feeding circuit. The three-two-phase conversion part sets up the whole nonlinear circuit equation correlating the three-phase AC side circuit equation with the nonlinear circuit equation by a relational expression expressing the three-phase AC side current with a function of the two-phase AC side current having a coefficient of the relation of the conversion ratio between the three-phase AC side voltage and the two-phase AC side voltage. The voltage and power every time of each node of the three-phase AC side and the two-phase AC side are calculated by solving the whole nonlinear circuit equation. COPYRIGHT: (C)2004,JPO&NCIPI