Control of energy storages in a microgrid
An energy storage and microgrid technology, applied in the energy industry, AC network load balancing, sustainable manufacturing/processing, etc., can solve the problems of charging rate and discharge rate limitation, power imbalance stability, etc., to achieve stable system operation, Economical and system-operated effects
Active Publication Date: 2017-02-22
HITACHI ENERGY SWITZERLAND AG
View PDF8 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] For improved power quality, energy stores should act quickly but they always have limitations due to ratings and energy remaining when needed
The rate of charge and discharge of any particular memory cell is also limited
The disadvantage is that the high rate of discharge (or charge) of the stored energy can cause tripping leading to power imbalance and stability issues
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0028] Embodiments now will be described more fully hereinafter with reference to the accompanying drawings, in which certain embodiments are shown. However, other embodiments, in many different forms, are possible within the scope of this disclosure. Rather, the following embodiments are provided by way of example so that this disclosure will be thorough and complete and will fully convey the scope of the disclosure to those skilled in the art. Like reference numerals refer to like elements throughout the specification.
[0029] figure 1 An embodiment of a microgrid 1 is illustrated, comprising: a plurality of distributed generators (DG) 5 and a plurality of energy stores 2, each energy store 2 comprising an energy storage device 4, such as a battery or a flywheel; and a local A storage controller 3 for controlling the charging / discharging of power to the energy storage device 4, eg injection of power into the microgrid. According to the invention, the storage controllers ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present disclosure relates to a method performed by a first control unit (21) for controlling a first energy storage (2) in a microgrid. The method comprises calculating a first storage capability parameter for the first energy storage. The method also comprises transmitting capability information about the first storage capability parameter to at least a second control unit configured for controlling a second energy storage in the microgrid. The method also comprises receiving capability information about a second storage capability parameter for the second energy storage from the second control unit. Further, the method comprises calculating a first power sharing ratio for the first energy storage, based on the first and second storage capabilities. Subsequently, the method comprises sending control signals comprising information based on the calculated first power sharing ratio, for controlling said first energy storage to inject an amount of power (P) into the microgrid in accordance with the first power sharing ratio for correcting an observed deviation ( delta f; delta Y) in the microgrid.
Description
technical field [0001] The present disclosure relates to a method of a control unit for controlling energy storage in a microgrid and such a control unit. Background technique [0002] Microgrids are localized groupings of generation, energy storage and loads that are typically connected to traditional centralized grid operations via points of common coupling. A microgrid is part of a so-called distributed generation structure intended to generate electrical power locally from many small energy sources which may be called distributed generators (DG:s) or microsources. [0003] In microgrids, system stability is improved with the application of energy storage for continuous active and reactive power injection as a stabilizer for the microgrid. The main control principle of such a stabilizer is active and reactive power injection based on local frequency and voltage deviations, respectively. In most cases, larger storage / stabilizers are economical. However, in a microgrid, ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H02J3/32H02J7/34
CPCH02J3/32H02J7/34Y02P80/14H02J2310/10H02J4/00H02J7/0068H02J13/00
Inventor R·玛朱姆德
Owner HITACHI ENERGY SWITZERLAND AG