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

Simulation method for improving accuracy of judging direct-current phase commutation failure

A technology of commutation failure and simulation method, which is applied in the field of simulation to improve the accuracy of judging DC commutation failure, can solve problems such as commutation failure, improve accuracy, avoid misjudgment of DC commutation failure, and have credibility Effect

Inactive Publication Date: 2015-10-14
CHINA SOUTHERN POWER GRID COMPANY +1
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, when the commutation arc-extinguishing angle of the converter valve is lower than 5°, commutation failure is a high probability event

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
  • Simulation method for improving accuracy of judging direct-current phase commutation failure
  • Simulation method for improving accuracy of judging direct-current phase commutation failure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0017] The present invention proposes a simulation method for improving the accuracy of judging DC commutation failure, one of which is as follows figure 1 shown. The present invention improves the simulation method for judging the accuracy of DC commutation failure. By judging the AC bus voltage on the inverter side of the DC system and simultaneously judging the commutation arc extinguishing angle of the converter valve of the DC system inverter station, when the AC bus voltage and When the commutation extinguishing angles of the converter valves in the inverter station reach or fall below their respective thresholds, it is considered that the commutation failure has occurred in the DC system.

[0018] The threshold value of the AC bus voltage on the inverter side of the DC system is set to a certain value, and the condition is established ...

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 simulation method for improving accuracy of judging direct current phase commutation failure. The method comprises: judging alternating current bus voltage at a direct current system inverter side, and simultaneously judging a phase commutation extinction angle of an inverter station converter valve of a direct current system; and when the alternating current bus voltage and the phase commutation extinction angle of the inverter station converter valve are detected to reach or be lower than a set threshold, considering that phase commutation failure occurs in the direct current system. According to the method, the direct current commutation failure is determined by the alternating current bus voltage at the direct current system inverter side and the phase commutation extinction angle of the inverter side converter valve, thereby improving probability of judging the direct current commutation failure, and reducing probability of mis-judging the direct current phase commutation failure. The method disclosed by the invention can improve the accuracy of judging the direct current commutation failure in simulation calculation; and in simulation means, the method is used to judge, so that the characteristics of direct current system can be simulated more practically, and the simulation accuracy of the whole system is improved.

Description

technical field [0001] The invention relates to a simulation method for improving the accuracy rate of judging DC commutation failure, in particular to a method for improving the accuracy rate of judging DC commutation failure in conventional DC transmission system simulation. Background technique [0002] With the rapid economic growth, the demand for electricity is getting higher and higher, and the distribution of energy and electricity consumption in my country is uneven. Places with intensive energy tend to have low demand for electricity, while areas with intensive loads tend to lack energy. , so the long-distance, high-voltage DC transmission system has developed rapidly under this background. China Southern Power Grid has now built an eight-circuit DC transmission system. It provides a solution to alleviate the problem of uneven energy distribution. Multi-circuit DC transmission can transmit electric energy efficiently, but at the same time there are certain hidden da...

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
IPC IPC(8): H02J3/36G01R31/08
CPCY02E60/60
Inventor 余江付俊波徐光虎王俊生朱韬析陈亦平
Owner CHINA SOUTHERN POWER GRID COMPANY
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