A Hierarchical Fault Diagnosis Method Based on Transient Current Information and Wavelet Entropy

A transient current and fault diagnosis technology, which is applied to fault locations, information technology support systems, and fault detection according to conductor types, can solve problems such as small steady fault current, reduced service life of switches, and misjudgment of faulty lines. Small amount of calculation, time saving, rapid detection effect
CN107064745BInactive Publication Date: 2019-05-10SHANDONG UNIV OF SCI & TECH +1
3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG UNIV OF SCI & TECH
Publication Date
2019-05-10
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a hierarchical fault diagnosis method based on transient current information and wavelet entropy. Firstly, the topological structure of the distribution network is analyzed, and then the three-phase current information at the outlet of the busbar is collected to extract the fault components and judge the occurrence of faults. The type of short-circuit fault, and then extract the corresponding transient current information to judge the general interval of the fault, and then perform wavelet packet decomposition calculation on the fault current in this interval to obtain the wavelet entropy value of the signal, and then upload it to the master station, the master station The specific line where the fault point is located is judged by the wavelet entropy value of each detection point. The invention has the advantages of less switching times, rapid identification of fault points and comprehensive identification of fault types.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a hierarchical fault diagnosis method based on transient current information and wavelet entropy. Background technique

[0002] The power system mainly includes four main links of power generation, power transmission, power distribution, and power consumption. Among them, power transmission and distribution are in the middle part of power generation and power consumption, and are extremely important links in the power system. With the release of "Several Opinions on Further Deepening the Reform of the Electric Power System" (Zhongfa

[2015] No. 9), a new round of electric power reform has kicked off. The most important changes are the separation of plant and network, and the separation of transmission and distribution. The security, stability, and rapid recovery of distribution networks have received more and more attention. Distribution network fault detection is a very important part of the distribution network. Once the dis...

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