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

A Microgrid Inverter Control Method Based on Improved Virtual Synchronous Generator

A technology of virtual synchronization and control method, applied in the direction of single-grid parallel feeding arrangement, etc., can solve the problems of large output current distortion rate of micro-grid inverter, poor anti-interference performance of inverter, and inability to take into account the dynamic adjustment performance of power adjustment. , to achieve the effect of improving steady-state performance and dynamic performance, improving anti-interference, and reducing distortion rate

Active Publication Date: 2022-07-29
NORTHEASTERN UNIV LIAONING
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional virtual synchronous generator control can make the power electronic interface type inverter have the characteristics of a generator, support the stability of the voltage and frequency of the microgrid, provide inertial buffer energy for the microgrid, and improve the reliability of the inverter power supply, but it cannot take into account The dynamic adjustment performance of power adjustment and frequency adjustment makes the anti-interference of the inverter output frequency poor; and the distortion rate of the output current of the microgrid inverter is large

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
  • A Microgrid Inverter Control Method Based on Improved Virtual Synchronous Generator
  • A Microgrid Inverter Control Method Based on Improved Virtual Synchronous Generator
  • A Microgrid Inverter Control Method Based on Improved Virtual Synchronous Generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0077] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. The following examples are intended to illustrate the present invention, but not to limit the scope of the present invention.

[0078] In this embodiment, a microgrid is taken as an example, and a microgrid inverter control method based on an improved virtual synchronous generator of the present invention is used to realize the control of the microgrid inverter.

[0079] A microgrid inverter control method based on an improved virtual synchronous generator, such as figure 1 and figure 2 shown, including the following steps:

[0080] Step 1. Collect the voltage and current output by the microgrid inverter and the filter inductor current of the inverter, and obtain the corresponding values ​​of the above parameters in the synchronous rotation dq coordinate system through park transformation, and then obtain the three-p...

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 provides a micro-grid inverter control method based on an improved virtual synchronous generator, and relates to the technical field of micro-grid inverter control. The method first collects the output parameters of the microgrid inverter and converts them into corresponding values ​​in the dq coordinate system to obtain the mathematical model of the microgrid inverter in the dq coordinate system; then calculates the active power output by the microgrid inverter , reactive power; use virtual governor and virtual excitation regulator to obtain virtual mechanical power and terminal voltage of virtual synchronous generator; then obtain reference voltage through improved VSG moment of inertia control algorithm; finally use the obtained reference voltage as improved The input of the voltage and current loop, the output pulse width modulation signal, drive the power device of the micro-grid inverter, and realize the control of the micro-grid inverter; the micro-grid inverter control based on the improved virtual synchronous generator provided by the present invention The method enables the micro-grid inverter under the condition of island operation to have the ability to support grid voltage stability and frequency response quickly.

Description

technical field [0001] The invention relates to the technical field of micro-grid inverter control, in particular to a micro-grid inverter control method based on an improved virtual synchronous generator. Background technique [0002] As a buffer link between distributed power and the power grid, the microgrid can solve the problems of low predictability and instability caused by the high proportion of various new energy sources entering the grid, and can improve the power quality and power supply reliability of the power grid. When a line fault occurs in the power grid, the microgrid inverter can operate in an off-grid operation mode (island operation). In the island running state, the virtual synchronous generator technology (VSG) is used to control the inverter. The virtual synchronous generator technology has the advantages of large inertia and large output impedance. Although the traditional virtual synchronous generator control can make the power electronic interface...

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): H02J3/38
Inventor 王安娜郑家琪
Owner NORTHEASTERN UNIV LIAONING
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