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

A Smooth Switching Method of Control Strategy for Voltage Source Converter

A control strategy and voltage source technology, applied in the direction of power transmission AC network, circuit devices, electrical components, etc., can solve the problems of increasing the adjustment time, unable to meet the high flexibility and controllability requirements of flexible DC transmission, and achieve the reduction of temporary State impact, fast and smooth switching process, and the effect of preventing over-current and over-voltage

Active Publication Date: 2022-05-13
SOUTHEAST UNIV
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to clear the integrator of the control system and restart the control strategy when unlocking. The whole process increases the adjustment time and cannot meet the high flexibility and controllability requirements of flexible DC transmission.

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 Smooth Switching Method of Control Strategy for Voltage Source Converter
  • A Smooth Switching Method of Control Strategy for Voltage Source Converter
  • A Smooth Switching Method of Control Strategy for Voltage Source Converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] see figure 1 , figure 2 , the voltage source converter control strategy referred to in the present invention includes power and reactive power decoupling control and active and reactive power non-decoupling control. Active and reactive decoupling controls include but are not limited to constant active and reactive power control, constant DC voltage and reactive power control, constant active power and AC voltage control, constant DC voltage and AC voltage control, and DC voltage slope control. Active and reactive non-decoupling controls include but are not limited to amplitude and phase control. The control strategy smooth switching method provided by the present invention is applicable when these types of control strategies are switched.

[0041] Specifically, the voltage source converter control strategy smooth switching method provided by the present invention includes the following steps:

[0042] (1) The control system collects actual electrical values, specifi...

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 control strategy smooth switching method for a voltage source converter, which includes: collecting actual electrical values; confirming the current control strategy after receiving a control strategy switching signal; controlling the proportional integral regulator in the control loop by the control system Carry out initial value setting, lock the setting value, modify the control target at the same time, and switch the control strategy. The invention can realize fast and smooth switching of the control strategy of the voltage source converter when the control target of the voltage source converter changes, reduces transient impact and improves the stability of the power system. The invention can prevent overcurrent and overvoltage in a transient state, and can realize the control target of a converter station in a steady state while ensuring rapid adjustment.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and relates to a control strategy smooth switching method for a voltage source converter. Background technique [0002] As an important technology in the smart grid, the high-voltage direct current transmission technology (VSC-HVDC) based on the voltage source converter has shown its specific advantages over traditional HVDC. VSC-HVDC can power passive networks, realize large-scale renewable energy grid integration, construct multi-terminal DC grids, independently and quickly control active and reactive power, and realize reverse power supply without voltage polarity inversion. With the increasing demand for grid-connection of new energy sources such as photovoltaics and wind power and passive network power supply, voltage source converters, as an important way of passive network power supply and new energy grid-connection, have gradually attracted attention. [0003] In recent years, ...

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): H02J3/36H02J3/24
CPCH02J3/36H02J3/24H02J2003/365H02J2203/20Y02E60/60
Inventor 李周李亚州
Owner SOUTHEAST UNIV
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