Unlock instant, AI-driven research and patent intelligence for your innovation.

Microgrid power quality stabilization method and device based on droop control

A technology of power quality and stabilization method, applied in the direction of circuit devices, electrical components, AC network circuits, etc., can solve the problems of maintaining micro-grid, limited capacity of synchronous rectifiers, etc., to promote frequency recovery, good bus voltage quality, and stabilize bus voltage fluctuating effect

Active Publication Date: 2019-09-27
NARI TECH CO LTD +5
View PDF4 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the capacity of the synchronous rectifier connected to the microgrid is limited. How to maximize the capacity of the synchronous rectifier to support the microgrid and maintain the bus voltage quality of the microgrid is a meaningful research topic.

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
  • Microgrid power quality stabilization method and device based on droop control
  • Microgrid power quality stabilization method and device based on droop control
  • Microgrid power quality stabilization method and device based on droop control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings.

[0040] Such as figure 1As shown, the control object of the method of the present invention is a three-phase PWM rectifier using synchronous rectification technology in the microgrid system. The synchronous rectification technology adopts DC constant voltage control, and its output side can maintain a stable DC voltage. Combining the droop mechanism of the synchronous rectification technology itself with the droop coefficient selected by this control method, the synchronous rectifier can be used to the greatest extent to stabilize the frequency and voltage fluctuations of the AC microgrid and ensure the power quality. The main circuit is mainly divided into three-phase PWM rectification part and Buck converter step-down part. The three-phase PWM rectifier circuit is connected to the three phases of the AC micro-grid respectively, va, vb, and vc are the three-phase volt...

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 microgrid power quality stabilization method and device based on droop control and belongs to the field of droop control of a microgrid. Through utilizing the synchronous rectification technology in a load three-phase PWM rectifier in a microgrid system, the three-phase PWM rectifier exhibits a droop mechanism similar to that of a synchronous machine, and the microgrid is supported. Considering the limited capacity of the synchronous rectifier connected with the microgrid, a frequency-active and voltage-reactive droop coefficient selection algorithm is proposed, the synchronous rectifier can be utilized to the maximum degree to support the microgrid, and the bus voltage quality is improved.

Description

technical field [0001] The invention relates to a method and device for stabilizing power quality of a microgrid based on droop control, and belongs to the technical field of droop control. Background technique [0002] At present, in today's increasingly scarce fossil energy, human beings are actively looking for clean energy. Renewable energy represented by wind energy and solar energy has gradually attracted people's attention and has been developed and developed rapidly. However, this kind of distributed power has the shortcomings of intermittent and decentralized, how to effectively connect it to the distribution network is a problem that people need to solve. [0003] The microgrid system is a small power generation and distribution system that organically integrates distributed power sources, loads, energy storage devices, converters, and monitoring and protection devices. It can become the link between distributed power sources and distribution networks. With key t...

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): H02J3/24H02J3/16H02J3/38
CPCH02J3/382H02J3/24H02J3/16Y02E40/30
Inventor 刘澄黄堃李延满李哲杨文金雪张敏陈振宇曹鑫
Owner NARI TECH CO LTD