Method and system for high-speed voltage drop detection

A technology of voltage drop and detection method, which is applied in the direction of measuring current/voltage, measuring device, measuring electrical variables, etc., can solve problems such as unfavorable power quality equipment, and achieve the effect of improving system speed

Inactive Publication Date: 2013-04-03
NANJING ANZHAO POWER ELECTRONICS
View PDF6 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is not good for power quality equip

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
  • Method and system for high-speed voltage drop detection
  • Method and system for high-speed voltage drop detection
  • Method and system for high-speed voltage drop detection

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] The present invention will be described in detail below in conjunction with the embodiments shown in the drawings. However, these embodiments do not limit the present invention, and the structural, method, or functional changes made by those skilled in the art based on these embodiments are all included in the protection scope of the present invention.

[0036] Participate figure 1 As shown, a high-speed voltage sag detection method of the present invention specifically includes:

[0037] S1, sample the instantaneous value U of the three-phase voltage at T1 x , See figure 2 Indicated x is phase A, B or C;

[0038] S2. Simultaneously predict and detect whether the voltage drops, and the pre-judgment time is less than the detection time. The detection algorithm used to detect voltage drop is a three-phase voltage drop detection algorithm based on a single-phase voltage detection method, or a three-phase improved dq voltage drop detection algorithm, or a wavelet transform volt...

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 method and system for high-speed voltage drop detection. The method includes: step one, sampling a three-phase voltage instantaneous value; step two, simultaneously anticipating and detecting whether voltage drops; and step three, judging whether a anticipating result is correct according to a detection result. The method and system for the high-speed voltage drop detection is provided with an instantaneous anticipating function on the basis of a traditional voltage drop detection method. Through rapid anticipating, pre-movement time can be given to a device, and system speed is improved. When anticipating goes wrong, the system can return to the normal operation condition rapidly through a reasonable control process, no injurious effect is led to normal operation of a load.

Description

technical field [0001] The invention relates to the technical field of power electronic control, in particular to a high-speed voltage drop detection method and system. Background technique [0002] Voltage sags and short voltage interruptions account for about 90% of all power quality problems. Siemens company has studied the impact of voltage sag (sag) on ​​electronic equipment widely used in modern society. The research results show that voltage sag exceeds a power frequency cycle, which will have a significant impact on some sensitive loads. In order to solve the voltage drop problem, researchers have designed various related power quality equipment, such as UPS, solid-state switches, dynamic voltage compensation devices, etc. The rapidity of voltage sag detection algorithms is critical to the performance of power quality related equipment. [0003] IEEE related standards define a voltage drop as an amplitude per unit value between 0.1 and 0.9, and a duration of half a...

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): G01R19/00
Inventor 彭宇
Owner NANJING ANZHAO POWER ELECTRONICS
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