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

Unified control system and method for photovoltaic microgrid DC bus voltage regulation and mppt

A technology of DC bus voltage and control method is applied in photovoltaic power generation, irreversible DC power input conversion into AC power output, single-grid parallel feeding arrangement, etc., which can solve the problem of high unit investment cost and economical operation of photovoltaic microgrid system. In order to improve the efficiency of grid connection

Active Publication Date: 2017-04-19
STATE GRID CORP OF CHINA +3
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In most photovoltaic microgrids currently using DC bus topology, in order to realize the decoupling of DC bus voltage regulation and MPPT (Maximum Power Point Tracking, Maximum Power Point Tracking) control, the PV module and DC bus are usually connected in series The DC / DC converter realizes the MPPT control of the photovoltaic modules through the DC / DC link, and then realizes the adjustment and control of the DC bus voltage through the DC / AC link, but this will reduce the photovoltaic grid-connected efficiency. The higher unit investment cost (compared with the photovoltaic power station without energy storage link), will further lead to poor operating economy of the photovoltaic microgrid 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
  • Unified control system and method for photovoltaic microgrid DC bus voltage regulation and mppt
  • Unified control system and method for photovoltaic microgrid DC bus voltage regulation and mppt
  • Unified control system and method for photovoltaic microgrid DC bus voltage regulation and mppt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The technical scheme of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0017] A unified control system for photovoltaic microgrid DC bus voltage regulation and MPPT, such as figure 1 As shown, it includes photovoltaic components, DC / AC modules, and bidirectional DC / DC modules connected to the DC bus. The bidirectional DC / DC module transmits electric energy to the DC bus through the first switch. The photovoltaic components and the DC / AC module An MPPT controller and an AC current loop are sequentially connected between them, and the input end of the AC current loop is also connected with a reactive current reference signal (when running at unity power factor ), the bidirectional DC / DC module is respectively connec...

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 DC bus voltage adjusting and MPPT unified control system and method of a photovoltaic microgrid, for the purposes of realizing unified control of MPPT control and DC bus voltage adjustment of a photovoltaic grid-connected inverter, improving the photovoltaic grid-connected efficiency and decreasing the operation cost of a photovoltaic microgrid system. According to the invention, unified control of the DC bus voltage adjustment and MPPT of the photovoltaic grid-connected inverter free from a DC / DC link and an energy storage apparatus comprising a DC / DC link under the condition of a common DC bus can be realized, the grid-connected efficiency of the photovoltaic inverter is improved, and the system and method provided by the invention is applied to the field of the photovoltaic microgrid.

Description

technical field [0001] The invention relates to a unified control system and method for photovoltaic microgrid DC bus voltage regulation and MPPT. Background technique [0002] Due to the advantages of renewable energy, cleanliness, and energy dispatchability, photovoltaic microgrids have received more and more attention from countries all over the world. In most photovoltaic microgrids currently using DC bus topology, in order to realize the decoupling of DC bus voltage regulation and MPPT (Maximum Power Point Tracking, Maximum Power Point Tracking) The DC / DC converter realizes the MPPT control of the photovoltaic modules through the DC / DC link, and then realizes the adjustment and control of the DC bus voltage through the DC / AC link, but this will reduce the photovoltaic grid-connected efficiency. The higher unit investment cost (compared with the photovoltaic power station without energy storage link), will further lead to poor operating economy of the photovoltaic micro...

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): H02J3/38H02M7/48
CPCY02E10/56
Inventor 王伟冯炜谢磊韦徽王彤宋飞
Owner STATE GRID CORP OF CHINA
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