Substation including train model information including information for controlling the regenerative power reduction amount of the train (8) existing in the DC electrification section, feeder network model information including the position information of the substation (5), and substation voltage control information Model information storage unit (1) for storing model information (10) including station model information, voltage values measured at model information (10), substation (5), and current of feeders by train direction Based on the value and the first train information of the train (8) equipped with the wireless communication device (81), the second train information of the train not equipped with the wireless communication device is estimated, and the train operation information (20 ), The substation voltage is controlled so that the regenerative power in the regenerative vehicle existing in the DC electrification section is increased based on the train operation information estimation unit (2) that outputs), the model information (10), and the train operation information (20). Substation voltage setting Calculating a value (30) comprises substation voltage set value calculation unit that outputs to the substation (5) and (3), the.
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