Grid interconnection device, grid interconnection system and power control system

• US 7,701,085 B2
• Filed: 05/29/2008
• Issued: 04/20/2010
• Est. Priority Date: 05/30/2007
• Status: Expired due to Fees

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Ito, Kazuo, Makino, Masahiro
• Primary Examiner(s): Paladini; Albert W
• Assistant Examiner(s): CAVALLARI, DANIEL J
• Application Number:
  US12/128,774
• Publication Number:
  US 20080296973A1
• Time in Patent Office: 691 Days
• Field of Search: 700/61, 700/286, 700/22, 702/61, 307/85, 307/147, 307/29
• US Class Current: 307/29
• CPC Class Codes: H02J 2300/24 of photovoltaic origin
• CPC Class Codes: H02J 2300/28 The renewable source being wind energy wind motors F03D
• CPC Class Codes: H02J 2300/30 The power source being a fuel cell
• CPC Class Codes: H02J 2300/40 wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
• CPC Class Codes: H02J 2310/14 The load or loads being home appliances
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 3/40 Synchronising a generator for connection to a network or to another generator
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers
• CPC Class Codes: Y02E 10/76 Power conversion electric or electronic aspects
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/242 Home appliances

Abstract

The grid interconnection device connected to the bank where alternating-current power is transmitted and to the power supply device provided to a customer includes: a detector detecting start of the alternating-current power transmission based on a state of the alternating-current power; a receiver receiving a grid interconnection start instruction for starting grid interconnection between the bank and the power supply device; and a grid interconnection controller controlling the bank and the power supply device to be interconnected or separated, in which the grid interconnection controller starts grid interconnection between the bank and the power supply device upon receipt of the grid interconnection start instruction in a state where the start of the alternating-current power transmission is detected.

Claims

1. A grid interconnection device connected to a power distribution system through which alternating-current power is transmitted and to a power supply device provided to a customer, the grid interconnection device comprising:

a detector configured to detect a start of transmission of the alternating-current power based on a state of the alternating-current power;

a receiver configured to receive a grid interconnection start instruction for starting grid interconnection between the power distribution system and the power supply device, through a predetermined transmission path

a determination unit configured to judge that the power distribution system and the power supply device should be interconnected when the receiver receives the grid interconnection start instruction, after the detector detects a start of transmission of the alternating-current power, and

a controller configured to control grid interconnection and power system separate of the power distribution system and the power supply device, in accordance with a result judged by the determination unit, wherein

the controller starts grid interconnection between the power distribution system and the power supply device upon receipt of the grid interconnection start instruction in a state where the detector detects the start of transmission of the alternating-current power.

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

the grid interconnection start instruction includes information specifying the power supply device starting the grid interconnection with the power distribution system, and

the grid determination unit determines that interconnection of the power supply device specified by the grid interconnection start instruction should be started.

3. The grid interconnection device according to claim 2, wherein grid interconnection of the power supply device other than the power supply device specified by the grid interconnection start instruction is prepared.

4. The grid interconnection device according to any one of claims 2 and 3, wherein the grid interconnection start instruction includes information specifying the type of the power supply device.

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

the grid interconnection start instruction includes area information specifying an area in which grid interconnection between the power distribution system and the power supply device to be started, and

the determination unit determines that grid interconnection between the power distribution system and the power supply device should be started when the area specified by the area information is its own area.

6. The grid interconnection device according to claim 5, wherein the determination unit determines that grid interconnection between the power distribution system and the power supply device should be started when the area specified by the area information is an area adjacent to its own area.

7. The grid interconnection device according to claim 1, wherein the power supply device includes a plurality of power supply devices, and the order of starting grid interconnection of the plurality of power supply devices is determined based on a load state of a power consumption device provided to the customer and a power supply amount of each of the plurality of power supply devices.

8. The grid interconnection device according to claim 5, wherein

the grid interconnection start instruction includes power supply amount information specifying a power supply amount of the power supply device which starts grid interconnection with the power distribution system, and

the determination unit determines that grid interconnection between the power distribution system and the power supply device should be started based on the power supply amount information, when the area specified by the area information is its own area.

9. A grid interconnection system comprising:

a grid interconnection device connected to a power distribution system through which alternating-current power is transmitted; and

a power supply device connected to the grid interconnection device, wherein

the grid interconnection device includes;

a detector configured to detect a start of transmission of the alternating-current power based on a state of the alternating-current power;

a receiver configured to receive a grid interconnection start instruction for starting grid interconnection between the power distribution system and the power supply device, through a predetermined transmission path; and

a determination unit configured to judge that the power distribution system and the power supply device should be interconnected when the receiver receives the grid interconnection start instruction, after the detector detects a start of transmission of the alternating-current power, and

a controller configured to control grid interconnection and power system separate of the power distribution system and the power supply device, in accordance with a result judged by the determination unit, and

the controller starts grid interconnection between the power distribution system and the power supply device upon receipt of the grid interconnection start instruction in a state where the detector detects the start of transmission of the alternating-current power.

10. A power control system comprising:

a grid interconnection device connected to a power distribution system through which alternating-current power is transmitted;

a power supply device connected to the grid interconnection device; and

a transmission device configured to transmit a grid interconnection start instruction for starting grid interconnection between the power distribution system and the power supply device, through a predetermined transmission path, wherein

the grid interconnection device includes;

a detector configured to detect a start of transmission of the alternating-current power based on a state of the alternating-current power;

a receiver configured to receive the grid interconnection start instruction through the predetermined transmission path from the transmission device;

a determination unit configured to judge that the power distribution system and the power supply device should be interconnected when the receiver receives the grid interconnection start instruction, after the detector detects a start of transmission of the alternating-current power, and

a controller configured to control grid interconnection and power system separate of the power distribution system and the power supply device, in accordance with a result judged by the determination unit, and

the controller starts grid interconnection between the power distribution system and the power supply device upon receipt of the grid interconnection start instruction in a state where the detector detects the start of transmission of the alternating-current power.