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Operation method of power transmission and distribution system using secondary battery

A storage battery, charge and discharge technology, applied in the direction of battery circuit devices, collectors, photovoltaic power generation, etc., can solve problems that have not been considered, and achieve the effect of realizing power supply, stabilizing power supply, and reducing battery capacity

Inactive Publication Date: 2012-03-14
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art described in Patent Document 1, when the electric power supplied to the load is insufficient, the load is controlled so as to be lightened according to the state of the non-commercial power source and the power storage device, but the following points are not considered

Method used

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  • Operation method of power transmission and distribution system using secondary battery
  • Operation method of power transmission and distribution system using secondary battery
  • Operation method of power transmission and distribution system using secondary battery

Examples

Experimental program
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Embodiment 1

[0029] according to Figure 1 to Figure 4 Example 1 of the present invention will be described. figure 1 It is a figure which shows the system using the storage battery of this Example.

[0030] In this embodiment, as an example of renewable energy for residential use, a photovoltaic power generation device 6 is installed on the roof of the house, and a monitor that measures the output of the photovoltaic power generation device 6 and output fluctuations is connected to the photovoltaic power generation device 6. device7. The photovoltaic power generation device 6 is connected to the control device 8 that controls the home appliances 11 in the houses respectively connected based on the output of the photovoltaic power generation device 6 measured by the monitoring device 7 and the measurement data of output fluctuations, and is further connected to the control device 8. The storage battery 9 and the second monitoring device 10 for measuring the heat storage capacity of the s...

Embodiment 2

[0037] according to Figure 5 Example 2 of the present invention will be described. Figure 5 It is a figure which shows the system using the storage battery of this Example. A photovoltaic power generation device 6 as an example of renewable energy for houses is installed on the roof of a house, and a monitoring device 7 for measuring output and output fluctuations of the photovoltaic power generation device 6 is connected to the photovoltaic power generation device 6 . The photovoltaic power generation device 6 is connected to the control device 8 that controls the home appliances 11 in the houses respectively connected based on the output of the photovoltaic power generation device 6 measured by the monitoring device 7 and the measurement data of output fluctuations, and is further connected to the control device 8. The storage battery 9 and the second monitoring device 10 for measuring the heat storage capacity of the storage battery 9 are connected. Figure 5 Although n...

Embodiment 3

[0048] Embodiment 3 of the present invention will be described with reference to the drawings. Image 6 It is a figure which shows the system using the storage battery of this Example.

[0049] Indicated at 19 is a medium-scale user group in which storage batteries 5 are connected to power demand facilities 15 and control devices 14 installed in buildings, factories, and large warehouses described in the second embodiment. It is managed as a virtual storage battery 24 that collects the remaining power of a plurality of storage batteries 5 .

[0050] Reference numeral 20 is a large-scale renewable energy source including a wind power generator, etc., and a monitoring device 21 connected to the renewable energy source 20 measures the output and output fluctuation of the renewable energy source 20 . For example, the wind power generator is connected to the power transmission system via a converter and a step-up transformer not shown, and is also connected to the thermal power ge...

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PUM

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Abstract

A battery-used power grid operation method for handling a home-use secondary battery as a virtual battery of medium- to large-scale and for lessening a necessary cell capacity to thereby enable efficient absorption of an output variation of renewable energy-derived electric power is provided. In a power system including electrical household appliances in a house having a renewable power generator, an individual house-installed rechargeable battery or separately central-managed battery, and a control device which measures and controls an output variation of the renewable power generator, those output variations of the renewable power generator occurring with time and due to changes of weather and seasons are absorbed as much as possible by preset-temperature control of the electric household appliances in the house while absorbing the remaining variations by charge / discharge of the battery, thereby lessening an electricity storage capacity required for the variation absorption.

Description

technical field [0001] The present invention relates to a system operating method using a storage battery in a power distribution system having a plurality of renewable energy sources of different scales and storage batteries. Background technique [0002] As the prior art, as described in Patent Document 1, a non-commercial power supply composed of natural utilization type self-contained power generation devices such as solar power generation and wind power generation, a power storage device for storing surplus electric energy, and a non-commercial power supply The power meter that monitors the output of the power storage device, the power meter that monitors the input and output of the power storage device, and the control unit, when the power supplied to the load is insufficient, the load is lightened according to the state of the non-commercial power supply and the power storage device. control. [0003] Patent Document 1: JP Unexamined Publication No. 2003-309928 [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCH02J3/32H02J7/35Y02E70/30H02J2300/40H02J2300/28H02J2300/24H02J3/381Y02B10/10Y02E10/56Y02E10/76H02J3/46
Inventor 相原孝志稻毛真一和知功渡边雅浩
Owner HITACHI LTD