Voltage phase sequence self-recognition and self-adaption device and method embedded in active power filter

A power filter and self-identification technology, which is applied to output power conversion devices, parts of electrical measuring instruments, measuring devices, etc. The commutation judgment is accurate and reliable, and the effect of improving the anti-interference performance

Pending Publication Date: 2022-03-22
JIANGSU MODERN POWER CAPACITOR
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing processing technology increases the difficulty o

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
  • Voltage phase sequence self-recognition and self-adaption device and method embedded in active power filter
  • Voltage phase sequence self-recognition and self-adaption device and method embedded in active power filter
  • Voltage phase sequence self-recognition and self-adaption device and method embedded in active power filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0045] In order to explain in detail the technical solutions adopted by the present invention to achieve the intended technical purpose, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described implementation Examples are only part of the embodiments of the present invention, rather than all embodiments, and, on the premise of not paying creative work, the technical means or technical features in the embodiments of the present invention can be replaced, the following will refer to the accompanying drawings and combine Examples illustrate the present invention in detail.

[0046] Such as figure 1 As shown, a voltage phase sequence self-identification self-adaptive device embedded in an active power filter is characterized in that it includes a system voltage conditioning module, a system current conditioning module, an ...

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 voltage phase sequence self-recognition and self-adaption device and method embedded in an active power filter. The system comprises a system voltage conditioning module, a system current conditioning module, an emitted current conditioning module, a second-order low-pass filtering orthogonal module, a phase discrimination module, a second-order direct current and alternating current switching module, a phase sequence judgment module, a voltage phase sequence switching module, a system current phase sequence switching module and an emitted current phase sequence switching module. According to the invention, a second-order low-pass filter and a second-order direct current and alternating current passing and blocking module are adopted, so that the influence of harmonic waves and interference on phase sequence judgment is eliminated; hysteresis comparison is adopted as the basis of commutation judgment, it is guaranteed that commutation judgment is accurate and reliable within the normal voltage range, when the voltage is abnormal, original normal judgment is kept, and the anti-interference performance of phase sequence judgment is improved.

Description

technical field [0001] The invention relates to a voltage phase sequence self-recognition self-adaptation device and method, in particular to a voltage phase sequence self-recognition self-adaptation device and method embedded in an active power filter, belonging to the technical field of power electronic converters. Background technique [0002] In the field of electronic converters, no matter the frequency converter or the active power filter, it is necessary to detect the phase sequence of the three-phase voltage. If the wiring of these converters is out of order, it will lead to problems that the equipment cannot operate normally. For example, the motor of the inverter is reversed, and the active power filter cannot stabilize the DC side voltage, resulting in equipment failure or even damage. [0003] At present, the commonly used voltage phase sequence detection methods are mainly zero-crossing detection method, fundamental wave phase angle calculation and comparison me...

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): G01R29/18G01R1/30H02M1/12H02M1/44
CPCG01R29/18G01R1/30H02M1/12H02M1/44
Inventor 夏武王宗臣薛玲丽李天鹰夏文沈卫峰冯国伟邱素素张锐王春华陈佳佳纪陈平
Owner JIANGSU MODERN POWER CAPACITOR
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