Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for determining filter cutoff frequency and output power control method for hybrid energy storage microgrid system

A hybrid energy storage and output power technology, applied in the field of microgrid, can solve the problems of output power amplitude fluctuation and poor adaptability

Inactive Publication Date: 2015-08-05
HOHAI UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing hybrid energy storage microgrid system in terms of output power amplitude fluctuations and poor adaptability caused by using the exhaustive method to determine the filter cut-off frequency, and to provide a hybrid energy storage The method for determining the cutoff frequency of the microgrid system filter and the method for controlling the output power, using the empirical mode decomposition technology to obtain the best cutoff frequency for high and low frequency division of the output power on the power supply side, and then realizing the efficient control of the microgrid power fluctuation range, Improve the stability of microgrid operation

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
  • Method for determining filter cutoff frequency and output power control method for hybrid energy storage microgrid system
  • Method for determining filter cutoff frequency and output power control method for hybrid energy storage microgrid system
  • Method for determining filter cutoff frequency and output power control method for hybrid energy storage microgrid system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0047] figure 1 The basic topology of a typical hybrid energy storage microgrid system is shown. Such as figure 1 As shown, it includes renewable energy generation (wind power, solar power, tidal power, etc.) and traditional generators (micro gas turbines, etc.). The output power of the power supply side in the microgrid is P g . Since the output power of renewable energy power generation largely depends on natural environmental conditions such as real-time wind speed, it is an uncontrollable power source; traditional generators can control the change of output power, so P g To meet the demand of the load side as much as possible. Considering the penetration rate of renewable energy generation, the peak shaving capability of traditional generators will be limited by its response time lag. Therefore, in order to make the output power of the power s...

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

The invention discloses a hybrid energy storage micro-grid system cut-off frequency determining method and relates to the technical field of micro-grids. The hybrid energy storage micro-grid system cut-off frequency determining method overcomes the defects that a method of exhaustion is used in an existing hybrid energy storage micro-grid system to determine the cut-off frequency, and consequently the amplitude of output power fluctuates, and the adaptability is poor; the empirical mode decomposition method is used for decomposing the output power of a micro power source into components of different instantaneous frequency grades, and therefore the optimal cut-off frequency for conducting high and low frequency division on the output power at the power source side is obtained. The invention further discloses a hybrid energy storage micro-grid system output power control method, according to the smoothness index of the power supply power of an independent micro-grid, the cut-off frequency is dynamically adjusted, and the output power of the micro-grid is controlled according to the cut-off frequency which is dynamically adjusted. Compared with the prior art, efficient control over the fluctuation range of the power of the micro-grid can be achieved, and the operation stability of the micro-grid is improved.

Description

technical field [0001] The present invention relates to the field of microgrid technology, in particular to a method for determining the cutoff frequency of a hybrid energy storage microgrid system and an output power control method. The hybrid energy storage microgrid system utilizes high power density energy storage equipment and high energy storage density energy storage The equipment respectively stabilizes the power after frequency division by the cutoff frequency. Background technique [0002] Good environmental and economic benefits have made microgrids more and more aroused the interest of the academic community and received extensive attention from cross-fields. However, due to the existence of distributed power sources in the microgrid, the control strategy and operation strategy of the microgrid are very different from the traditional power system. Moreover, judging from the current power structure, distributed power is still dominated by uncontrollable renewable...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/32
Inventor 孙承晨袁越曹阳
Owner HOHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products