Storage battery system and solar power generation system having the same

Patent metadata

Field	Value
Publication number	US-9979200-B2
Application number	US-201615001577-A
Country	US
Kind code	B2
Filing date	Jan 20, 2016
Priority date	Jan 26, 2015
Publication date	May 22, 2018
Grant date	May 22, 2018

Abstract

A solar power generation system includes a storage battery, a solar power generation device that is provided on the side of the storage battery and outputs solar generated power, and a power control device. The power control device includes a variation component extraction unit that extracts a shade variation component from a generated power signal measured by the solar power generation device, and a smoothing unit that smoothens the shade variation component obtained by the variation component extraction unit. The power control device obtains a charge/discharge target value of the storage battery on the basis of an output signal from the smoothing unit.

First claim

What is claimed is:

1. A solar power generation system comprising:
a storage battery;
a solar power generation device that is provided on the side of the storage battery and outputs solar generated power; and
a power control device,
wherein the power control device includes
a variation component extraction unit that extracts a shade variation component from a generated power signal measured by the solar power generation device; and
a smoothing unit that smoothens the shade variation component obtained by the variation component extraction unit, and

wherein the power control device obtains a charge/discharge target value of the storage battery on the basis of an output signal from the smoothing unit,
wherein the power control device further includes a terminal provided with an insolation meter measuring an insolation amount and a display unit,
wherein generated power output results of the solar power generation device and/or history of the insolation amount are/is displayed on a display screen of the terminal,
wherein the power control device further includes a standard generated power calculation unit that obtains generated power obtained by the solar power generation device in fine weather as standard generated power, and
wherein the variation component extraction unit extracts the shade variation component on the basis of the generated power signal and the standard generated power,
wherein the display unit of the terminal includes
a first display region that displays the generated power output results of the solar power generation device and/or the history of the insolation amount;
a second display region that displays a system diagram of the solar power generation system; and
a third display region that receives inputting of a parameter for defining the standard generated power, and
wherein the display unit of the terminal further includes a fourth display region that allows a time period of the generated power output results of the solar power generation device and/or the history of the insolation amount to be displayed in the first display region, to be designated and be input.

2. A solar power generation system comprising:
a storage battery;
a solar power generation device that is provided on the side of the storage battery and outputs solar generated power; and
a power control device,
wherein the power control device includes
a variation component extraction unit that extracts a shade variation component from a generated power signal measured by the solar power generation device; and
a smoothing unit that smoothens the shade variation component obtained by the variation component extraction unit,

wherein the power control device obtains a charge/discharge target value of the storage battery on the basis of an output signal from the smoothing unit,
wherein the power control device further includes
a standard generated power calculation unit that obtains generated power obtained by the solar power generation device in fine weather as standard generated power; and
a recovery unit that multiplies the standard generated power and the output signal from the smoothing unit so as to obtain a system output power target value corresponding to total output power obtained by the solar power generation device and the storage battery,
wherein the variation component extraction unit extracts the shade variation component on the basis of the generated power signal and the standard generated power, and
wherein a charge/discharge target value of the storage battery is obtained by using a difference between the generated power signal and the system output power target value.

3. A storage battery system comprising:
a storage battery that performs charging and discharging with solar generated power output from a solar power generation device; and
a power control device,
wherein the power control device includes
a variation component extraction unit that extracts a shade variation component from a generated power signal measured by the solar power generation device; and
a smoothing unit that smoothens the shade variation component obtained by the variation component extraction unit, and

wherein the power control device obtains a charge/discharge target value of the storage battery on the basis of an output signal from the smoothing unit,
wherein the power control device further includes a standard generated power calculation unit that obtains generated power obtained by the solar power generation device in fine weather as standard generated power,
wherein the variation component extraction unit extracts the shade variation component on the basis of the generated power signal and the standard generated power,
wherein the power control device further includes a terminal provided with an insolation meter measuring an insolation amount and a display unit, and
wherein generated power output results of the solar power generation device and/or history of the insolation amount are/is displayed on a display screen of the terminal.

4. The storage battery system according to claim 3 ,
wherein the display unit of the terminal includes
a first display region that displays the generated power output results of the solar power generation device and/or the history of the insolation amount;
a second display region that displays a system diagram of the solar power generation system; and
a third display region that receives inputting of a parameter for defining the standard generated power.

5. A storage battery system comprising:
a storage battery that performs charging and discharging with solar generated power output from a solar power generation device; and
a power control device,
wherein the power control device includes
a variation component extraction unit that extracts a shade variation component from a generated power signal measured by the solar power generation device; and
a smoothing unit that smoothens the shade variation component obtained by the variation component extraction unit, and

wherein the power control device obtains a charge/discharge target value of the storage battery on the basis of an output signal from the smoothing unit,
wherein the power control device further includes a standard generated power calculation unit that obtains generated power obtained by the solar power generation device in fine weather as standard generated power,
wherein the variation component extraction unit extracts the shade variation component on the basis of the generated power signal and the standard generated power,
wherein the power control device further includes a standard generated power calculation unit that obtains generated power obtained by the solar power generation device in fine weather as standard generated power,
wherein the variation component extraction unit extracts the shade variation component on the basis of the generated power signal and the standard generated power,
wherein the power control device further includes a recovery unit that multiplies the standard generated power and the output signal from the smoothing unit so as to obtain a system output power target value corresponding to total output power obtained by the solar power generation device and the storage battery, and
wherein a charge/discharge target value of the storage battery is obtained by using a difference between the generated power signal and the system output power target value.

6. A power control device comprising:
a variation component extraction unit that extracts a shade variation component from a generated power signal measured by the solar power generation device;
a smoothing unit that smoothens the shade variation component obtained by the variation component extraction unit;
a calculation unit that obtains a charge/discharge target value of the

Assignees

• Hitachi Ltd

Inventors

• Takeda Kenji
• Nomura Taichi
• Sano Yuko
• BEPPU Kenichirou
• Nagashima Yuuji

Classifications

• H02J7/35

  with light sensitive cells · CPC title

• Y02E70/30

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

• H02J3/381

  Dispersed generators · CPC title

• H02J2101/24

  Photovoltaics · CPC title

• H02J3/383 Primary

  Electricity · mapped topic