GRID CONTROLLER FOR USE IN SMART GRID SYSTEM, SMART GRID SYSTEM INCLUDING THE SAME, AND METHOD OF CONTROLLING SMART GRID SYSTEM
First Claim
1. A grid controller for use in a smart grid system in which at least one power generating unit and a plurality of power storage units are connected to each other and to an external power system in such a manner as to allow the power generating unit and the plurality of power storage units to transmit electric power to and receive electric power from each other and the external power system, each power storage unit including a power storage part storing electric power and a controller performing charge-discharge control of the power storage part, whereinthe grid controller is communicably connected to the controllers of the respective power storage units,the grid controller:
- obtains transmission power Pall transmitted from the smart grid system to the external power system, the transmission power Pall being a sum of electric power generated by the power generating unit, electric power consumed by loads in the smart grid system, and electric power charged into and discharged from the power storage units;
calculates differential power Δ
P between the transmission power Pall and a smoothing operation output Pall′
, the smoothing operation output Pall′
being obtained by performing smoothing operation on the transmission power Pall by using a smoothing filter; and
performs control of smoothing the transmission power Pall by performing allocation of the differential power Δ
P of the transmission power Pall in accordance with a charge-discharge state of each of the power storage parts of the plurality of power storage units.
1 Assignment
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Accused Products
Abstract
A grid controller is communicably connected to controllers of a plurality of power storage units. The grid controller: obtains transmission power transmitted from the smart grid system to an external power system, the transmission power being a sum of electric power generated by power generating units, electric power consumed by loads in the smart grid system, and electric power charged into and discharged from the power storage units; calculates differential power between the transmission power and a smoothing operation output, the smoothing operation output being obtained by performing smoothing operation on the transmission power by using a smoothing filter; and performs control of smoothing the transmission power by performing allocation of the differential power of the transmission power in accordance with a charge-discharge state of each of power storage parts of the plurality of power storage units.
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Citations
10 Claims
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1. A grid controller for use in a smart grid system in which at least one power generating unit and a plurality of power storage units are connected to each other and to an external power system in such a manner as to allow the power generating unit and the plurality of power storage units to transmit electric power to and receive electric power from each other and the external power system, each power storage unit including a power storage part storing electric power and a controller performing charge-discharge control of the power storage part, wherein
the grid controller is communicably connected to the controllers of the respective power storage units, the grid controller: -
obtains transmission power Pall transmitted from the smart grid system to the external power system, the transmission power Pall being a sum of electric power generated by the power generating unit, electric power consumed by loads in the smart grid system, and electric power charged into and discharged from the power storage units; calculates differential power Δ
P between the transmission power Pall and a smoothing operation output Pall′
, the smoothing operation output Pall′
being obtained by performing smoothing operation on the transmission power Pall by using a smoothing filter; andperforms control of smoothing the transmission power Pall by performing allocation of the differential power Δ
P of the transmission power Pall in accordance with a charge-discharge state of each of the power storage parts of the plurality of power storage units. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of controlling a smart grid system in which at least one power generating unit and a plurality of power storage units are connected to each other and to an external power system in such a manner as to allow the power generating unit and the plurality of power storage units to transmit electric power to and receive electric power from each other and the external power system, each power storage unit including a power storage part storing electric power and a controller performing charge-discharge control of the power storage part, wherein
the method comprising: -
obtaining transmission power Pall transmitted from the smart grid system to the external power system, the transmission power Pall being a sum of electric power generated by the power generating unit, electric power consumed by loads in the smart grid system, and electric power charged into and discharged from the power storage units; calculating differential power Δ
P between the transmission power Pall and a smoothing operation output Pall′
, the smoothing operation output Pall′
being obtained by performing smoothing operation on the transmission power Pall by using a smoothing filter; andperforming control of smoothing the transmission power Pall by performing allocation of the differential power Δ
P of the transmission power Pall in accordance with a charge-discharge state of each of the power storage parts of the plurality of power storage units.
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Specification