Single-phase high-resistance line break fault identification method and device of power distribution network

A technology for fault identification and disconnection fault, which is applied in fault location, measurement device, and fault detection according to conductor type, etc. It can solve the problem of difficulty in identifying single-phase disconnection faults.

Active Publication Date: 2019-03-08
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the basis of WAMS, the present invention detects and analyzes the voltage of the downstream load side of the fault through a distributed measurement device, and uses this as a bas

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
  • Single-phase high-resistance line break fault identification method and device of power distribution network
  • Single-phase high-resistance line break fault identification method and device of power distribution network
  • Single-phase high-resistance line break fault identification method and device of power distribution network

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0067] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art fall within the protection scope of the present invention.

[0068] Commonly used distribution transformers have two wiring methods, Y-Y type and Δ-Y type.

[0069] For Y-Y type transformer, its equivalent circuit is as figure 1 Shown.

[0070] Where U IA , U IB , U IC Are the three-phase input voltages of A, B, and C three-phase lines to the transformer; C A , C B , C C Distributed capacitance to grou...

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 single-phase high-resistance line break fault identification method and device of a power distribution network. A wide area measurement system is used to synchronously measure three phases of voltages in the downstream load side of a fault, the voltage amplitude of the fault phase in the load side is calculated and analyzed, and high-resistance single-phase line break fault identification is carried out on the basis of the voltage amplitude of the fault phase in the load side. Compared with a traditional identification method, a load-side equivalent circuit model under different grounding conditions and different grounding transitional resistances is analyzed and calculated, the fault identification method has a higher identification accuracy and wider applicationrange, and a feasible effective new scheme is provided for overcoming difficulty in single-phase high-resistance line break fault identification of the power distribution network.

Description

technical field [0001] The invention relates to a fault identification method for distribution network lines, and more specifically, to a method and device for fault identification of single-phase high-blocking line faults in a distribution network based on wide-area measurement. Background technique [0002] The distribution network is directly connected to users and is an important part of the power system. Its operating status is directly related to the quality of electricity consumption and personal safety of users. After a single-phase disconnection fault in the distribution network occurs, the three-phase voltage on the downstream load side of the fault is obviously unbalanced, which leads to the lack of phase operation of the three-phase power equipment such as the motor, and eventually burns out due to heat, causing serious economic losses; When a phase disconnection fault occurs, it is often accompanied by a ground fault. This kind of disconnection ground fault is d...

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): G01R31/08
CPCG01R31/086G01R31/088Y04S10/52
Inventor 任杰苏建军孟海磊李沐李立生李建修辜超刘洪正刘明林文艳刘宁赵辰宇王峰樊迪
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap