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

Design method of single-phase ground fault alarm for medium voltage ship power system

A single-phase-to-ground fault, power system technology, applied in instruments, measurement of electricity, measurement of electrical variables, etc., can solve problems such as the inability to accurately determine the operating status of medium-voltage power systems, and the large false alarm rate and missed alarm rate.

Active Publication Date: 2020-06-30
HANGZHOU DIANZI UNIV
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, considering the complex situation of the medium-voltage power system, these traditional methods cannot eliminate various uncertainties in the operation of the medium-voltage power system and the interference of sensor information, resulting in excessive false positive and false negative rates, which cannot To achieve the purpose of accurately judging the operating status of the medium voltage power system

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
  • Design method of single-phase ground fault alarm for medium voltage ship power system
  • Design method of single-phase ground fault alarm for medium voltage ship power system
  • Design method of single-phase ground fault alarm for medium voltage ship power system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0053] In order to be more suitable for medium-voltage ship power systems and reduce the false alarm rate and false alarm rate of single-phase ground fault alarms, the present invention uses a confidence fusion technology that combines static fusion and dynamic fusion, which is different from traditional alarms , that is, the two alarm confidences with uncertainty at each moment are statically fused using the alarm confidence static fusion rule to obtain the static alarm confidence at each moment, and then use the alarm confidence dynamic fusion rule to integrate the current time The dynamic fusion of the static alarm confidence level and the dynamic alarm confidence level in the past can obtain a more accurate judgment on the operation status of the medium-voltage ship power system, and achieve the purpose of real-time monitoring and precise alarm.

[0054] Such as figure 1 Shown, the present invention comprises the following steps:

[0055] (1) For the medium-voltage ship 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 discloses a design method of a single-phase ground fault alarm for a medium-voltage ship power system, and belongs to the field of ship safety operation and maintenance. According to theinvention, firstly the two alarm confidences with uncertainties at each moment are subjected to static fusion by using an alarm confidence static fusion rule, the static alarm confidence at each moment is obtained, then the static alarm confidence at a current moment and static alarm confidence at a previous moment are dynamically fused by using an alarm confidence dynamic fusion rule, the dynamic alarm confidence at the current moment is obtained, whether an alarm is judged under a relevant judgment criterion, and the false alarm rate and missing alarm rate of the alarm can be effectively reduced by a confidence fusion process with the combination of static fusion and dynamic fusion.

Description

technical field [0001] The invention relates to a design method for a single-phase grounding fault alarm in a medium-voltage ship power system, belonging to the field of safe operation and maintenance of ships. Background technique [0002] In the medium-voltage marine power system, the number of cables is large, the total length is long, and the equivalent ground capacitance is significantly larger than that of the low-voltage marine power system. The harm of single-phase ground faults cannot be ignored. As a frequent fault, the single-phase ground fault will cause the non-ground phase-to-ground voltage to rise, and long-term operation with faults will affect the insulation level of the cable, resulting in accelerated aging of the cable. It will also cause (intermittent) arcing at the grounding point, resulting in serious faults, and then develop into two-phase, three-phase (short-circuit) grounding faults. In general, effective protection against such faults can be achiev...

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): G01R31/52
CPCG01R31/50
Inventor 徐晓滨翁旭胡燕祝高海波高迪驹
Owner HANGZHOU DIANZI 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