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

Power decoupling method of virtual synchronous generator based on single rotation angle virtual power

A generator power and virtual power technology, which is applied in the direction of converting AC power input to DC power output, output power conversion device, wind power generation, etc., can solve the problems of weakening the coupling degree of inverter output power, and achieve dynamic and static protection. Stability, good tracking effect, easy to achieve effect

Active Publication Date: 2021-11-19
SHANGHAI UNIVERSITY OF ELECTRIC POWER
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem of power oscillation caused by the power coupling of the output power of the virtual synchronous generator during line transmission, and proposes a power decoupling method of the virtual synchronous generator based on the virtual power of a single rotation angle. It can weaken the coupling degree of the output power of the inverter when the system is connected to the medium and low voltage microgrid, thereby suppressing the oscillation of the output power, improving the dynamic and static stability of the entire inverter system, and ensuring its safe and reliable operation

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
  • Power decoupling method of virtual synchronous generator based on single rotation angle virtual power
  • Power decoupling method of virtual synchronous generator based on single rotation angle virtual power
  • Power decoupling method of virtual synchronous generator based on single rotation angle virtual power

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] Such as figure 1 It is a block diagram of the overall structure of the virtual synchronous generator power decoupling method based on the virtual power of a single rotation angle, including a DC voltage source, a high-frequency switching three-phase inverter, an LC filter, and a power detection for detecting the output power of the inverter Transmitter, virtual power calculation unit, virtual synchronous generator algorithm unit, detection transmitter used to detect inverter side current and filter capacitor voltage, convert three-phase current and voltage in three-phase stationary coordinate system into two The coordinate transformation unit of the two-phase current and voltage in the phase rotation coordinate system is used for coordinate transformation of the three-phase current on the inverter side and the three-phase voltage of the filter capacitor, and a double-loop control unit for controlling the reference voltage, and two One PI controller for regulating the vo...

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 a power decoupling method of a virtual synchronous generator based on a virtual power of a single rotation angle. Since a fixed rotation angle is used in the virtual power conversion, it is not necessary to consider the impedance angle of the output impedance of the inverter. The sensitivity is small, the design is simple, and it is easy to implement; the inherent inertia structure in the virtual synchronous generator algorithm is used to solve the weak decoupling problem caused by the fixed rotation angle, which ensures the dynamic and static stability of the system; the present invention has high control precision, With good tracking effect, it can effectively suppress power oscillation and provide damping support for the power grid. It is suitable for new energy grid-connected systems such as solar power and wind power to be connected to medium and low voltage micro-grids. This method can weaken the coupling degree of the output power of the inverter when the system is connected to the medium and low voltage microgrid, thereby suppressing the oscillation of the output power, improving the dynamic and static stability of the entire inverter system, and ensuring its safe and reliable operation.

Description

technical field [0001] The invention relates to an inverter control technology, in particular to a power decoupling method of a virtual synchronous generator based on virtual power of a single rotation angle. Background technique [0002] Grid-connected inverters have been widely used as the interface between distributed power generation and the grid. Since power electronic equipment cannot provide the required inertia and damping for the grid, with the continuous improvement of the penetration rate of distributed power generation, the power grid The inertia and damping are seriously insufficient, and the stability is reduced. Virtual synchronous generator technology simulates the operating characteristics of synchronous generators, provides inertia and damping for the grid, and becomes an effective way to solve this problem. [0003] Virtual synchronous generator technology imitates the characteristics of primary frequency regulation and primary voltage regulation of synch...

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): H02J3/38H02M7/5387
CPCH02J3/38H02M7/5387Y02E10/76
Inventor 杨旭红陈昊张云飞刘洋姚凤军陆浩郝鹏飞宋兴龙
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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