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

Method for realizing on-grid and off-grid dual-mode running of dual-directional converter in micro-grid

A bidirectional converter and micro-grid technology, applied in the field of micro-grid, can solve the problems of inability to provide a stable voltage source, complex system configuration, etc., and achieve the effect of fast and seamless conversion

Active Publication Date: 2011-09-14
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +2
View PDF5 Cites 26 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, light and wind energy power sources are intermittent and random and cannot provide a stable voltage source. If a power source is installed in a system that already has an energy storage device, it will not only require additional equipment investment, but also complicate system construction.

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 realizing on-grid and off-grid dual-mode running of dual-directional converter in micro-grid
  • Method for realizing on-grid and off-grid dual-mode running of dual-directional converter in micro-grid
  • Method for realizing on-grid and off-grid dual-mode running of dual-directional converter in micro-grid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] Such as figure 1 As shown, the microgrid system is composed of grid-connected and off-grid controllers, microgrid control systems, battery packs, bidirectional converters, photovoltaic power generation systems and loads. The micro-grid control system communicates and is controlled by the micro-grid control system to realize real-time control and monitoring of the micro-grid control system. The off-grid controller communicates with the microgrid control system, and the microgrid control system sends a signal to the bidirectional converter to control its charging or discharging action; the bidirectional converter communicates with the BMS of the energy storage battery pack through CAN bus communication , to monitor the operating status of the battery pack in real time.

[0012] Such as figure 2 As shown, the method for the bidirectional converter of the present invention to realize the dual-mode operation of on-grid and off-grid in the microgrid includes the following ...

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 method for realizing on-grid and off-grid dual-mode running of dual-directional converter in micro-grid, which comprises the following steps of: detecting whether the macro-grid loses power or recovers power supply by an on- and off-grid controller in the micro-grid, sending 'ready to be off grid' or 'off grid' or 'ready to be on grid' or 'on grid' commands to the dual-directional converter via two binary coding interfaces, meanwhile allowing the on- and off -grid controller to communicate with a micro-grid control system, and sending charge and discharge power command signals by the micro-grid control system to make the dual-directional converter act correspondingly. When the micro-grid loses power, the dual-directional converter is shifted from the on-grid running state into the off-grid running state and switched into the voltage resource working mode without extra equipment investment, so the problem that an accumulation system and a photovoltaic on-grid inverter fails to work when the micro-grid loses power, the problem that it is difficult to construct a micro-grid system and the problem that the seamless switching between the off-grid running and on-grid running under micro-grid control fails are solved.

Description

technical field [0001] The invention relates to the field of micro-grids, in particular to a method for a bidirectional converter in a micro-grid to realize dual-mode operation of on-grid and off-grid. Background technique [0002] At present, my country's strong and smart grid has entered the stage of comprehensive construction, and will vigorously promote demonstration projects, electric vehicle charging and swapping facilities, new energy acceptance, and residents' smart electricity consumption. As an important part of the smart grid, the micro grid will also be widely used. Microgrid refers to a small power generation and distribution system composed of distributed power sources, energy storage devices, energy conversion devices, related loads and monitoring and protection devices. It is an autonomous system that can realize self-control, protection and management. It can run in parallel with the external power grid, and can also run in isolation. The energy storage and...

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): H02J3/38
CPCH02J9/06Y02E10/763H02J3/386H02J2003/388H02J7/34H02J3/38Y02E10/563H02J3/383Y02E10/566H02J3/387Y02B10/72H02J3/388H02J2300/30H02J2300/28H02J2300/24H02J3/381Y02B10/70Y02E10/56
Inventor 李朝晖王璟余晓鹏杨海晶王洋刘巍刘波杨宝生
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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