Hybrid energy storage system power distribution method based on states of charge

A hybrid energy storage system and state of charge technology, applied in the direction of reducing/preventing power oscillation, single-network parallel feeding arrangement, etc., can solve the problems of supercapacitors losing their buffering effect and unable to work

Active Publication Date: 2014-01-08
GUANGXI POWER GRID CORP +1
View PDF1 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, this filtering method is not a method to inherently remove adverse effects
The disadvantage of the second type of method is that the supercapacitor may lose its buffering effect for a p

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hybrid energy storage system power distribution method based on states of charge
  • Hybrid energy storage system power distribution method based on states of charge
  • Hybrid energy storage system power distribution method based on states of charge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The power distribution method for a hybrid energy storage system based on the state of charge is well known, including the following steps:

[0054] The first energy storage device D1 is set as a super capacitor, and the second energy storage device D2 is set as a lithium iron phosphate battery. Let the maximum power that the hybrid energy storage system can absorb or emit is P max .

[0055] The power density of supercapacitors is high, and its power upper limit can easily exceed P max ; And because the energy density of the supercapacitor is very small, the time it can continuously emit or absorb power is very short. In order to ensure the power support in a long time scale, the upper limit of the power of the lithium iron phosphate battery must also be not less than P max ; therefore, the power limit of both energy storage devices is not less than P max The assumption is easy to satisfy.

[0056] Assume that the power command that the hybrid energy storage system...

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

No PUM Login to view more

Abstract

A hybrid energy storage system power distribution method based on states of charge includes the following steps that an energy storing device which is long in cycle life and capable of achieving large-current deep charge and discharge is set to be a first energy storing device D1, an energy storing device which is short in cycle life and the cycle life of the energy storing device is affected by large-current deep charge and discharge is set to be a second energy storing device D2, the second energy storing device D2 provides compensation power for the first energy storing device D1 according to the states of charge of the first energy storing device D1 to enable the states of charge to be in a reasonable level. According to the hybrid energy storage system power distribution method, capacity of the first energy storing device D1 is utilized to convert seriously-changing power fluctuation into stably-changing fluctuation of the states of charge, therefore, the intensity of power instruction fluctuation of the second energy storing device D2 can be reduced, and the service life of the second energy storing device D2 can be prolonged.

Description

technical field [0001] The invention relates to a power distribution method for a hybrid energy storage system based on the state of charge, belonging to the technical field of energy storage system control, and is a power distribution method for a hybrid energy storage system based on the state of charge of two different types of energy storage devices. Background technique [0002] In the microgrid with renewable energy as the main form of power generation, the energy storage system needs to absorb or emit power according to the command, which plays a role in smoothing the power fluctuation of renewable energy when the microgrid is connected to the grid, and ensures the microgrid when the microgrid is off-grid. Real-time power balancing within the network. [0003] The forms of energy storage commonly used in microgrids include flywheel energy storage, superconducting energy storage, supercapacitors, and batteries. The battery has high energy density, but low power densit...

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
no application Login to view more
IPC IPC(8): H02J3/46H02J3/24
Inventor 孙艺敏肖曦丁若星田培根黄秀琼王奎杨艺云张阁
Owner GUANGXI POWER GRID CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap