Power control device

Patent metadata

Field	Value
Publication number	US-9356444-B2
Application number	US-201113806497-A
Country	US
Kind code	B2
Filing date	Jun 29, 2011
Priority date	Jul 9, 2010
Publication date	May 31, 2016
Grant date	May 31, 2016

Abstract

To solve problems arising when a power conditioner equivalent to that connected to a solar panel is connected to a power storage device.
Direct-current power generated by the solar panel 9 is supplied to a DC-DC converter 51 and output as a predetermined direct-current voltage. The output voltage of the converter 51 is supplied to a DC-AC inverter 52 . Direct-current power generated by the power storage device 11 is supplied to a DC-DC converter 55 . Predetermined direct-current power from the converter 55 is supplied to a DC-AC inverter 56 . Alternating-current power output by the inverter 56 is supplied to an alternating-current power system at home. The converter 55 is configured to have two output voltages. The first output voltage is a standby voltage. The second voltage is a voltage at which the inverter 56 starts power supply to outside.

First claim

The invention claimed is:

1. A power control device comprising:
a direct-current power storage;
a first power conditioner connected to the storage;
a direct-current power generator;
a second power conditioner connected to the generator; and
an alternating-current power system to which alternating-current power from the first power conditioner is supplied and to which alternating-current power from the second power conditioner is supplied, wherein
the first power conditioner includes a first DC-DC converter and a first DC-AC inverter, the first DC-DC converter is configured to generate first and second outputs, wherein the first output makes the first DC-AC inverter enter a standby state, and the second output makes the first DC-AC inverter output alternating-current power to the alternating-current power system.

2. The power control device according to claim 1 , wherein the first DC-DC converter of the first power conditioner and a second DC-DC converter of the second power conditioner have a function of maximum peak point tracking control.

3. The power control device according to claim 1 , wherein direct-current power is stored in the storage by direct-current power generated by the generator.

4. The power control device according to claim 1 , wherein the first and second power conditioners are configured to supply alternating-current powers in synchronization with each other to the alternating-current power system.

5. The power control device according to claim 1 , wherein the generator is a photovoltaic power generator.

6. The power control device according to claim 1 , wherein the second power conditioner comprises a second DC-DC converter and a second DC-AC inverter.

7. The power control device according to claim 1 , wherein the first output of the first DC-DC converter is lower than a predefined threshold and the second output of the first DC-DC converter is equal to or higher than the predefined threshold.

Assignees

• Kubota Eiichiro
• Avitabile Antonio
• Mariella Costantino Cristiano
• Rutherford Christopher Michael
• Colby Edward Grellier
• Bailey Nicholas George
• Knill Alexander Charles
• Mehta Harshul Deepak
• Sony Corp

Inventors

• Kubota Eiichiro
• Avitabile Antonio
• Mariella Costantino Cristiano
• Rutherford Christopher Michael
• Colby Edward Grellier
• Bailey Nicholas George
• Knill Alexander Charles
• Mehta Harshul Deepak

Classifications

• H02J3/381

  Dispersed generators · CPC title

• Y02E70/30

  Systems combining energy storage with energy generation of non-fossil origin · CPC title

• H02J2101/24

  Photovoltaics · CPC title

• Y10T307/707

  Cross-Sectional Technologies · mapped topic

• Y02E10/563

  Cross-Sectional Technologies · mapped topic