| CPC G06Q 50/06 (2013.01) | 7 Claims |

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1. A power trading system comprising: a matching server and a retail electricity business management device that are connected via a network, wherein
the matching server includes a matching server processor functioning as:
an order reception unit configured to receive a sell order of power from a first contractor who is under a contract of power trading by matching, and receive a purchase order from a second contractor who is under the contract of the power trading by matching; and
a matching unit that matches the sell order and the purchase order received by the order reception unit and concludes a power sales contract, and the retail electricity business management device includes a management side processor functioning as a power supply and demand planning unit configured to plan power supply and demand between the first contractor and the second contractor,
wherein the power supply and demand planning unit,
plans the power supply and demand to include a power supply from a third contractor to the second contractor and a power supply from the first contractor to a fourth contractor when the third contractor is on a side of the sell order and the fourth contractor is on a side of the purchase order, the third contractor and the fourth contractor are not participating in the power trading by matching and sell or buy power based on a power sales contract different from the power trading by matching, and a following condition is satisfied:
a total value of a power transmission and distribution distance between the third contractor and the second contractor and a power transmission and distribution distance between the fourth contractor and the first contractor is shorter than a power transmission and distribution distance between the first contractor and the second contractor; and
the third contractor is a contractor who sells the power corresponding to a reception power for the purchase order of the second contractor and the fourth contractor is a contractor who purchases the power corresponding to a sell power for the sell order of the first contractor, and wherein
the management side processor further functions as a control instruction transmission control unit configured to manage one or more charge/discharge resources associated with at least one of the first contractor, the second contractor, the third contractor, and the fourth contractor, and to generate and transmit a control instruction to the one or more charge/discharge resources to perform at least one of a charge operation and a discharge operation according to the planned power supply and demand, and
the one or more charge/discharge resources execute at least one of the charge operation and the discharge operation upon acquisition of the control instruction.
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