Grid Interconnection Device, Grid Interconnection System, And Power Control System

• US 20100217453A1
• Filed: 02/26/2010
• Published: 08/26/2010
• Est. Priority Date: 02/26/2009
• Status: Active Grant

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: HIRATA, Toshiyuki, ITOH, Kazuo, MAKINO, Masahiro
• Granted Patent: US 8,321,064 B2
• Time in Patent Office: Days
• US Class Current: 700/295
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: H02J 3/38 Arrangements for parallely feeding a single network by two or more generators, converters or transformers
• CPC Class Codes: Y02P 80/10 Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
• CPC Class Codes: Y02P 90/50 Energy storage in industry with an added climate change mitigation effect

Abstract

A grid interconnection device 100 for interconnecting a power storage device to a power distribution system to which alternating current power is distributed, the grid interconnection device comprises a receiver 101 and a controller 104. The receiver 101 receives a second adjustment instruction transmitted before a first adjustment instruction. The controller 104 controls the power storage amount on the basis of the second adjustment instruction.

Claims

1. A grid interconnection device for interconnecting a power storage device to a power distribution system to which alternating current power is distributed, the grid interconnection device comprising:

a controller configured to control input/output power indicating forward flow power that flows from the power distribution system to the power storage device and/or backward flow power that flows reversely from the power storage device to the power distribution system; and

a receiver configured to receive a first adjustment instruction to adjust or set the input/output power, and a second adjustment instruction to adjust a power storage amount in the power storage device, the first adjustment instruction transmitted through a predetermined transmission path, the second adjustment instruction transmitted through the predetermined transmission path before the first adjustment instruction, wherein

the controller controls the input/output power on the basis of the first adjustment instruction, and controls the power storage amount on the basis of the second adjustment instruction.

2. The grid interconnection device according to claim 1, wherein

the second adjustment instruction indicates an increase of the power storage amount, and

the first adjustment instruction indicates an increase of the backward flow power.

3. The grid interconnection device according to claim 1, wherein

the second adjustment instruction indicates a decrease of the power storage amount, and

the first adjustment instruction indicates a decrease of the backward flow power or an increase of the forward flow power.

4. A grid interconnection system comprising:

a grid interconnection device for interconnecting a power storage device to a power distribution system to which alternating current power is distributed, wherein

the grid interconnection device comprises;

a controller configured to control input/output power indicating forward flow power that flows from the power distribution system to the power storage device and/or backward flow power that flows reversely from the power storage device to the power distribution system; and

a receiver configured to receive a first adjustment instruction to adjust or set the input/output power, and a second adjustment instruction to adjust a power storage amount in the power storage device, the first adjustment instruction transmitted through a predetermined transmission path, the second adjustment instruction transmitted through the predetermined transmission path before the first adjustment instruction, wherein

the controller controls the input/output power on the basis of the first adjustment instruction and controls the power storage amount on the basis of the second adjustment instruction.

5. A power control system comprising:

a power distribution facility configured to distribute alternating current power to a power distribution system; and

a plurality of customers each including a grid interconnection device configured to interconnect a power storage device to the power distribution system, wherein

the plurality of customers are grouped into a plurality of groups,

the grid interconnection device comprises;

a controller configured to control input/output power indicating forward flow power that flows from the power distribution system to the power storage device and/or backward flow power that flows reversely from the power storage device to the power distribution system;

a receiver configured to receive a first adjustment instruction to adjust or set the input/output power, and a second adjustment instruction to adjust a power storage amount in the power storage device, the first adjustment instruction transmitted through a predetermined transmission path, the second adjustment instruction transmitted through the predetermined transmission path before the first adjustment instruction; and

a determination unit configured to determine whether or not an own group to which the grid interconnection device belongs to is an application group, on the basis of group information being included in each of the first adjustment instruction and the second adjustment instruction and indicating the application group to which each of the first adjustment instruction and the second adjustment instruction is applied among the plurality of groups, wherein

the controller controls the input/output power on the basis of the first adjustment instruction and controls the power storage amount on the basis of the second adjustment instruction if the determination unit determines that the own group is the application group.

6. The power control system according to claim 5, wherein the power distribution facility comprises:

a calculator configured to calculate an adjustment amount or a set amount of the input/output power on the basis of a history of a voltage value of the power distribution system or a history of a power usage amount in the customer; and

an instruction generator configured to generate the first adjustment instruction including information that indicates the adjustment amount or the set amount calculated by the calculator.

7. The power control system according to claim 5, wherein the power distribution facility comprises:

a calculator configured to calculate an adjustment amount or a set amount of the input/output power on the basis of a weather condition; and

an instruction generator configured to generate the first adjustment instruction including information that indicates the adjustment amount or the set amount calculated by the calculator.

8. The power control system according to claim 5, wherein the power distribution facility comprises:

a calculator configured to calculate an adjustment amount or a set amount of the input/output power on the basis of information on an event that influences power consumption in a customer; and

an instruction generator configured to generate the first adjustment instruction including information that indicates the adjustment amount or the set amount calculated by the calculator.