Power distribution network failure data self-synchronizing method based on instantaneous amplitude change

A technology of distribution network fault and instantaneous amplitude, applied in fault location, information technology support system, etc., can solve the problems of large detection error at fault time, slow start, poor self-synchronization effect, etc., to improve the accuracy and speed of time synchronization Fast, highly sensitive results

Active Publication Date: 2015-03-04
STATE GRID CORP OF CHINA +1
5 Cites 25 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0006] In order to solve the above problems, the present invention proposes a distribution network fault data self-synchronization method based on instantaneous amplitude changes. Self-synchronization of fault data based on the characteristics of instantaneous c...
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

Abstract

The invention discloses a power distribution network failure data self-synchronizing method based on instantaneous amplitude change. According to the power distribution network failure data self-synchronizing method, the instantaneous amplitude of the failure current is calculated by use of the instantaneous sampled values of three-phase currents at the same moment, failure synchronization is realized according to the characteristic that the instantaneous amplitude of the currents after a failure changes suddenly, and whether the failure exists is determined according to whether the magnitude of the sudden change of two cycle current instantaneous amplitudes before and after the failure exceeds a certain threshold; the power distribution network failure data self-synchronizing method has the characteristics of high sensitivity and high speed, and is capable of effectively overcoming the defects of an existing fault detection method, such as slow start, high failure moment detection error and poor self-synchronizing effect in case of failures occurring near a current zero-crossing point; without increasing the construction cost, the clock synchronization accuracy is improved to meet the requirements of the line longitudinal differential protection of the power distribution network.

Application Domain

Technology Topic

Image

  • Power distribution network failure data self-synchronizing method based on instantaneous amplitude change
  • Power distribution network failure data self-synchronizing method based on instantaneous amplitude change
  • Power distribution network failure data self-synchronizing method based on instantaneous amplitude change

Examples

  • Experimental program(1)

Example Embodiment

[0063] Example 1
[0064] Such as image 3 As shown, the specific steps for implementing the method for self-synchronization of distribution network fault data based on instantaneous amplitude changes are as follows:
[0065] Step 1: The logic program starts;
[0066] Step 2: Collect current sampling data of current transformer in real time, and extract the sampling data of ABC three-phase current at the same time;
[0067] Step 3: Calculate the instantaneous amplitude of current in real time using the product of sampled values ​​(two-point or three-point product of sampled values);
[0068] Step 4: Calculate the sudden change in current amplitude of one cycle forward;
[0069] Step 5: Determine the fault. If there are three consecutive current instantaneous integrated amplitude mutations that exceed the threshold, determine the existence of the fault;
[0070] Step 6: Fault processing, take the first point above the mutation threshold as the fault moment, and calculate the relevant feature quantities.
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

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
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

Similar technology patents

Classification and recommendation of technical efficacy words

  • High sensitivity
  • Accelerate

System and method for optical coherence imaging

ActiveUS20060055936A1Sufficient signal to noise ratioHigh sensitivityInterferometersScattering properties measurementsPhysicsCoherent imaging
Owner:THE GENERAL HOSPITAL CORP

Catheter-free implantable needle biosensor

ActiveUS20080033269A1High sensitivitySimple stepSurgeryVaccination/ovulation diagnosticsNeedle electrodeElectricity
Owner:VIRTUE MEDICAL TECH (HUZHOU) CO LTD
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