Power consumption mode guiding device and system

Patent metadata

Field	Value
Publication number	US-9705326-B2
Application number	US-201214387125-A
Country	US
Kind code	B2
Filing date	Mar 23, 2012
Priority date	Mar 23, 2012
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

A power consumption mode guiding device includes a local system wherein the frequency of power on an AC line, is controlled at a target frequency determined according to the state of charge of a power storage device. The power consumption mode guiding device includes a frequency detection unit that detects the actual frequency of power on the AC line, an information storage unit in which guidance information for guiding the mode of use of a power consumption device by a power consumer (D) to a prescribed mode are stored in advance in association with frequency information obtained from detection results from the frequency detection unit, and a guidance information output unit that reads out, from the information storage unit, the guidance information associated with the frequency information obtained from the detection result from the frequency detection unit, and outputs the guidance information to the power consumer (D).

First claim

The invention claimed is:

1. A power consumption mode guiding device provided in a local system that has an AC line to which a power consumption device of a power consumer is connected, a power storage device, and a local inverter device connecting the power storage device and the AC line, the power consumption mode guiding device comprising a frequency detection unit that detects the actual frequency of power on the AC line,
wherein the local inverter device performs control such that the voltage of the power on the AC line is at a target voltage, and such that the frequency of the power on the AC line is at a target frequency calculated by adding a frequency variation component determined by a function of the state of charge of the power storage device to a reference frequency of the AC line,
the power consumption mode guiding device further comprising:
an information storage unit wherein a plurality of pieces of guidance information are stored in advance in association with pieces of frequency information obtained from detection results from the frequency detection unit, the guidance information being provided for giving guidance such that the power consumption of the power consumption device decreases or increases; and
a guidance information output unit that reads out, from the information storage unit, the piece of the guidance information that is associated with the piece of frequency information obtained from a detection result from the frequency detection unit, and outputs the piece of guidance information to the power consumer.

2. The power consumption mode guiding device according to claim 1 , comprising:
a deviation amount calculating unit that compares the actual frequency detected by the frequency detection unit and a reference frequency of the AC line, and calculates a deviation amount of the actual frequency relative to the reference frequency as the frequency information,
wherein the plurality of pieces of guidance information are stored in the information storage unit in advance in association with deviation amount magnitudes, and
the guidance information output unit reads out, from the information storage unit, the piece of guidance information that is associated with the magnitude of the deviation amount calculated by the deviation amount calculating unit, and outputs the piece of guidance information to the power consumer.

3. The power consumption mode guiding device according to claim 1 , wherein the guidance information output unit outputs the guidance information to the power consumer using at least one of audio and text.

4. The power consumption mode guiding device according to claim 1 , wherein the guidance information output unit outputs the guidance information to the power consumer as information for controlling power consumption in the power consumption device.

5. A power consumption mode guiding system comprising:
a plurality of local systems provided with the power consumption mode guiding device according to claim 1 ,
wherein a linking inverter device that connects the power storage device of one local system to the AC line of another local system is provided between local systems such that the plurality of local systems are electrically connected in series, and
with respect to two local systems that are adjacent to each other and electrically connected via one linking inverter device, the one linking inverter device performs electric power transmission such that power is transmitted from the local system in which the state of charge of the power storage device is relatively higher to the local system in which the state of charge of the power storage device is relatively lower, based on the target frequencies determined according to the states of charge of the power storage devices.

6. The power consumption mode guiding system according to claim 5 ,
wherein in each of the local systems, the local inverter device calculates the target frequency by adding a frequency variation component determined by a function of the state of charge of the power storage device to a reference frequency of the AC line, and
a relational expression between the state of charge and the frequency variation component is set separately in each of the local systems.

Assignees

• Nakao Kunihiro
• YAKIRE Koji
• Hirai Tomoyuki
• Nagata Satoshi
• Osaka Gas Co Ltd
• Wind Eng Center Co Ltd

Inventors

• Nakao Kunihiro
• YAKIRE Koji
• Hirai Tomoyuki
• Nagata Satoshi

Classifications

• H02J1/002

  using intermediate DC-AC-DC conversion · CPC title

• H02J3/00142

  Oscillations concerning frequency · CPC title

• H02J3/34

  Arrangements for transfer of electric power between networks of substantially different frequency · CPC title

• Y02P80/14

  District level solutions, i.e. local energy networks · CPC title

• H02J7/345

  using capacitors as storage or buffering devices · CPC title