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

Improved equalization control method for multiple energy storage units of direct-current microgrid

A DC microgrid, balanced control technology, applied in the direction of load balancing in DC network, parallel operation of DC power supply, DC network circuit device, etc., can solve the frequent switching of controllers, adverse effects of control effects, and increase the difficulty of controller design. and other problems, to achieve the effect of increasing the design difficulty, omitting the sag coefficient, and simple form

Active Publication Date: 2021-03-02
ANHUI UNIVERSITY OF TECHNOLOGY
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the control method proposed in the above literature ignores the line resistance between the converter output terminal and the DC bus, and the droop control expressions corresponding to the charging and discharging process are different. During the dynamic conversion process of the energy storage unit, the controller Frequent switching is required, which not only increases the difficulty of controller design, but also adversely affects the control effect of the system

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
  • Improved equalization control method for multiple energy storage units of direct-current microgrid
  • Improved equalization control method for multiple energy storage units of direct-current microgrid
  • Improved equalization control method for multiple energy storage units of direct-current microgrid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0035] see Figure 1-5 , this embodiment provides a technical solution: an improved balance control method for multiple energy storage units in a DC microgrid, comprising the following steps:

[0036] Step 1: Construct the balance control circuit of the multi-energy storage unit of the DC microgrid. The balance control circuit of the multi-energy storage unit of the DC microgrid includes a DC-DC bidirectional conversion circuit, an input current sampling circuit, a...

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 relates to the field of electrical control, in particular to an improved equalization control method for multiple energy storage units of a direct-current microgrid. The improved equalization control method comprises the following steps of: constructing an equalization control circuit of the multiple energy storage units of the direct-current microgrid, constructing a monotonically increasing function according to self charge state parameters, and introducing the monotonically increasing function into an energy storage unit improved droop control loop, so as to form a reference voltage of the control system; and enabling the reference voltage, the sampled output voltage and the sampled input current to form a double-closed-loop control system, outputting a duty ratio controlsignal by a digital controller to drive a switching power device, and realizing communication-free self-adaptive droop control of an energy storage unit. According to the improved equalization controlmethod, an algorithm is applied to two working modes of charging and discharging of the energy storage unit, switching is not needed, output current of the interface converter does not need to be sampled, and the design of the controller is simplified.

Description

technical field [0001] The invention relates to the field of electrical control, in particular to an improved balance control method for multiple energy storage units of a DC microgrid. Background technique [0002] In recent years, as a power supply system that integrates distributed energy, energy storage components, and power converters, microgrids have attracted extensive attention from academic circles in various countries. As a reliable and efficient power supply method, DC microgrid has become an important form of future intelligent power distribution system due to its advantages of strong system reliability, high transmission efficiency and no need to consider phase, reactive power and harmonic issues. [0003] As a small inertia and weak support system, the DC microgrid usually has a small capacity and does not have good anti-interference ability. In order to meet the stable operation of the system and increase the capacity configuration, the energy storage units (...

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 Applications(China)
IPC IPC(8): H02J1/10H02J1/14
CPCH02J1/106H02J1/14
Inventor 方炜齐楠刘晓东刘宿城
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com