| 摘要 |
PURPOSE:To permit the smooth sift to the regenerative movement and suppress the minimum value of the circulation electric current by matching the electric current of a converter and an inverter of a dc. system electric railroad and the detected electric amount and the set electric amount of the voltage of an electric train line and carrying-out the constant-voltage control for the voltage of the electric train line on the basis of the deviation output. CONSTITUTION:In the power running of an electric car 6, electric power is supplied from a converter 3, and since the output electric current A of a converter 15 is larger than each of set electric current ICNset and Ijset, an amplifier 19 transmits a signal C into a matching circuit 22, and the set voltage of a regenerative voltage setting device 23 is increased to VDCset, and an inverter 8 does not transmit circulation electric current. Then, the electric current of the converter 3 reduces, and the state A<Ijset is formed, and the amplifier 19 transmits a correction signal so that Ijset=A+B, and phase control is carried-out by the output of the circuit 22, and a certain circulation electric current is supplied into the inverter 8. When the electric car 6 is regeneration-driven, and the electric current of the converter 3 becomes zero, the state A<ICNset is formed, and the state B>=Ijset is formed, and the circuit 22 outputs a deviation, and the electric car is smoothly regeneration-driven by controlling the voltage of the electric-car line so as not to exceed a set value.
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