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Control device, charge storage system, control method, and computer program

A control device and a technology of discharge control, applied in the field of power storage systems, can solve the problem of undisclosed discharge depth, etc., and achieve the effect of maximizing economic benefits

Inactive Publication Date: 2012-05-23
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, none of these documents discloses a method of determining the depth of discharge in response to the price difference of dynamically fluctuating electricity prices.

Method used

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  • Control device, charge storage system, control method, and computer program
  • Control device, charge storage system, control method, and computer program
  • Control device, charge storage system, control method, and computer program

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0043] figure 1 It is a block diagram of the power storage system 1a of Embodiment 1.

[0044]This power storage system 1 a has a connection unit 11 , a bidirectional converter 12 , a secondary battery 13 , and a control device 14 .

[0045] The connection unit 11 is a connection terminal to the commercial power system 10 and accommodates a breaker and the like for protecting the commercial power system 10 and the bidirectional converter 12 in the event of an accident.

[0046] The bidirectional converter 12 is connected to the commercial power system 10 via the connection unit 11 , and bidirectionally converts the AC power of the commercial power system 10 and the DC power of the secondary battery 13 . The direction and amount of electric power converted by the bidirectional converter 12 , that is, the direction and amount of charge and discharge of the secondary battery 13 are instructed by the control device 14 .

[0047] The secondary battery 13 temporarily stores the el...

Embodiment approach 2

[0070] exist figure 1 In the power storage system 1a of , consider a case where the relationship between the depth of discharge x (0≤x≤1) and the cycle life N of the secondary battery 13 is given by a function N(x). In this case, assuming that the current time is t=0, and minimizing the following cost function TC(·), the cost of the secondary battery 13 at each time t (=0, 1, . . . , T−1) can be determined. Charge and discharge capacity Δs t .

[0071] [Formula 1]

[0072] TC ( Δ s 0 , Δ s 1 , . . . , Δ s T - 1 ) = Σ t = 0 T ...

Embodiment approach 3

[0108] Figure 5 It is a block diagram of the power storage system 1c of Embodiment 3.

[0109] In addition, in Figure 5 in, for with figure 1 The same reference numerals are used for the same constituent elements, and explanations thereof are appropriately omitted.

[0110] Such as Figure 5 As shown, in the case where the power storage system is installed in a consumer household together with the demand facility 51, if the power demand of the demand facility 51 is small, a reverse flow to the commercial power system 10 may occur due to the discharge of the power storage system ( selling electricity). In this case, a wattmeter 52 may be provided, and the control device 14 may determine the charging and discharging amount Δs t The function PC(Δs t , t). In addition, in order to perform these, demand forecasting etc. are generally required.

[0111] In addition, the wattmeter 52 may be part of the power storage system 1c, or may be provided outside the power storage sy...

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PUM

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Abstract

A control device (14) in a charge storage system connected to a commercial power system has: a degradation price holding unit (14a) for holding discharge costs in correspondence to the depths of discharge of a secondary battery (13) so as to enable a depth of charge and discharge to be appropriately determined in consideration of the life characteristics of a storage battery and the price difference in dynamic power prices; a price information acquiring unit (14b) for acquiring power prices; and a depth-of-discharge switching unit (14c) for allowing the secondary battery to discharge with a depth of discharge that allows the discharge costs held in correspondence to the depths of discharge not to exceed the price difference.

Description

technical field [0001] The present invention relates to a power storage system for commercial electric power. Background technique [0002] With recent advances in battery technology accompanying the spread of notebook computers and portable information devices, techniques for storing commercial electric power using secondary batteries are being studied. For example, Patent Document 1 discloses a configuration of a commercial electric power storage system using a battery module in which a plurality of small secondary batteries are connected in series and in parallel. [0003] As an application of these commercial power storage systems, attention has been paid to smoothing the generated power of wind power generation and solar power generation in recent years. In addition, it has been considered an application to reduce the electricity cost of households in need by charging at night when electricity costs are cheap and discharging during the day when electricity prices are h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00G06Q50/06H01M10/42H01M10/44G06Q40/00
CPCH02J7/042G06Q40/00H02J7/007H02J7/04
Inventor 加治充
Owner PANASONIC CORP
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