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

An island detection and stability control method for four-terminal HVDC distribution network

A stable control method and technology of DC distribution network, applied in the direction of AC network circuit, power transmission AC network, AC network load balancing, etc., can solve problems such as severe voltage fluctuations

Active Publication Date: 2019-01-15
SOUTH CHINA UNIV OF TECH
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the method of using the difference of DC transformer and energy storage ratio parameters and the method of constant DC voltage reference value slope change solves the problem of drastic fluctuations in the voltage of the DC low-voltage side of the DC transformer during the switching process

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
  • An island detection and stability control method for four-terminal HVDC distribution network
  • An island detection and stability control method for four-terminal HVDC distribution network
  • An island detection and stability control method for four-terminal HVDC distribution network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0056] The present invention will be further described below in conjunction with specific examples.

[0057] The islanding detection and stability control method of the four-terminal DC distribution network provided in this embodiment can be realized on the RTDS simulation platform, such as figure 1 As shown, the four-terminal DC distribution network includes a first AC grid ACgrid1, a second AC grid ACgrid2, a first AC circuit breaker ACCB1, a second AC circuit breaker ACCB2, a first DC circuit breaker DCCB1, a second DC circuit breaker DCCB2, third DCCB3, fourth DCCB4, fifth DCCB5, sixth DCCB6, seventh DCCB7, eighth DCCB8, first DC line L1, the second DC line L2, the third DC line L3, the first DC bus #1, the second DC bus #2, the third DC bus #3, the fourth DC bus #4, the fifth DC bus #5, The first AC bus #6, the second AC bus #7, the third AC bus #8, the first modular multilevel voltage source converter MMC-VSC1, the second modular multilevel voltage source converter MMC ...

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 an island detection and stability control method of a four-terminal DC distribution network, which comprises the following steps: 1) an island detection main criterion based ona switch state combination; 2) flow-free base Assistant Criterion of Compound Pressure Difference for Island Detection; 3) islanding stability control based on DC transformer and energy storage. Theinvention combines the main criterion based on the combination of switching states and the main criterion based on no-current. Combined with the auxiliary criterion of differential voltage compound, the islanding of four-terminal HVDC distribution network is detected and the islanding detector is designed. When the islanding detector detects the islanding, it switches the control mode of DC transformer and energy storage of T3 to realize the stable control of the islanding, so as to maintain the stable operation of the whole islanding power network.

Description

technical field [0001] The invention relates to the technical field of DC distribution network, in particular to an island detection and stability control method for a four-terminal DC distribution network. Background technique [0002] Compared with the AC distribution network, the DC power distribution system has the ability to smoothly connect various distributed power sources on the spot, realize the closed-loop operation of multiple power sources, flexibly carry out bidirectional flow and control of active power, improve the power quality of the user side, A series of advantages such as isolating system failures. Therefore, the research of DC power distribution system has important social significance and broad application prospects. [0003] At present, the research on DC distribution network is still in its infancy, mainly focusing on the topology and control methods of DC distribution network, and there is little research on islanding detection and stability control...

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): H02J3/24H02J3/36H02J3/28H02J3/48
CPCH02J3/24H02J3/28H02J3/36H02J3/48H02J3/388H02J2203/20Y02E60/60H02J3/001
Inventor 宋伟伟张勇军
Owner SOUTH CHINA UNIV OF TECH
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