Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Low frequency interharmonic passive power filter for single-tuned power network

A technology of power filters and power capacitors, applied in AC networks to reduce harmonics/ripples, harmonic reduction devices, etc., can solve problems such as voltage fluctuations

Active Publication Date: 2017-04-12
上海坤友电气有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a single-tuned power network low-frequency inter-harmonic passive power filter, which mainly solves the power quality problems of voltage fluctuation and flicker caused by low-frequency inter-harmonics of the existing power network

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
  • Low frequency interharmonic passive power filter for single-tuned power network
  • Low frequency interharmonic passive power filter for single-tuned power network
  • Low frequency interharmonic passive power filter for single-tuned power network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] figure 1 , which is a schematic diagram of the principle of the single-tuned power network low-frequency inter-harmonic passive power filter of the present invention. It has three high-voltage equivalent low-frequency power capacitors 1. The equivalent low-frequency power capacitors 1 are installed with a capacitor cabinet 6. The capacitor cabinet has three-phase lead-in cables 2 connected to the power grid, which are respectively connected to the three-phase power supplies A, B, and C of the power grid. The three-phase wiring 3 is respectively connected to the high-voltage equivalent low-frequency power inductor 4; three high-voltage equivalent low-frequency power inductors 4, the power inductor 4 is installed by the electrical cabinet 7, and the power inductor cabinet has a lead-out cable connected to the neutral line 5.

[0015] figure 2 , the equivalent capacitance value of the three high-voltage equivalent low-frequency power capacitors is determined according t...

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 relates to a power grid inter-harmonic passive power filter, in particular to a single-tuning power grid low-frequency inter-harmonic passive power filter. The single-tuning power grid low-frequency inter-harmonic passive power filter is composed of a low-frequency power inductor and a low-frequency power capacitor. The power inductor and the power capacitor are connected to a circuit in series. The power filter is installed in a dual-electric-cabinet mode. The dual electric cabinets are a power inductor cabinet and a power capacitor cabinet. The power capacitor cabinet is provided with a lead-in cable connected with a medium-voltage power grid. The power capacitor cabinet is provided with a lead-out cable connected with a neutral line. The single-tuning power grid low-frequency inter-harmonic passive power filter is mainly used for eliminating and reducing the voltage flickering phenomenon and the voltage fluctuation fault phenomenon caused by existing power grid low-frequency inter-harmonics, the damage, caused by power grid voltage low-frequency flicker, to in-network electrical devices and vision of electricity workers is avoided, and the quite effective role in solving the electric energy quality problem caused by the power grid low-frequency inter-harmonics is played.

Description

technical field [0001] The invention relates to a three-phase power network inter-harmonic passive power filter, in particular to a single-tuned power network low-frequency inter-harmonic passive power filter. Background technique [0002] Existing passive power filters can only filter harmonics whose frequency is an integral multiple of the power frequency, and inter-harmonics, that is, harmonics whose frequency is not an integral multiple of the power frequency, especially low-frequency inter-harmonics. filtering effect. However, as power electronic equipment, such as various converters, especially various AC-DC-AC speed regulation systems operating in four quadrants are widely used in power grids, especially the application of various high-power speed regulation systems, these devices generate A large number of interharmonics are injected into the power grid, causing voltage fluctuations and flicker in the power grid, seriously affecting the safe operation of power equip...

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
Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01
CPCY02E40/40
Inventor 杨文焕薛新明张建颖
Owner 上海坤友电气有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com