Resonant filter-based MMC DC deicing device and design method thereof

A DC deicing and filter technology, applied in cable installation, overhead installation, electrical components, etc., can solve the problems of large harmonics, limited application range, voltage stress, large valve loss, etc., and achieve the effect of simple operation

Inactive Publication Date: 2016-09-28
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional DC deicing device can achieve reactive power compensation and DC deicing mode conversion through the simple opening and closing operation of the external isolating switch, but the harmonics generated during operation are relatively large, and the response speed is slightly slow, so a large-capacity filter needs to be installed When the traditional DC ice melting device SVC is running, the voltage stress and valve loss are relatively large, and the DC ice melting and reactive power compensation device operates in the reactive power compensation mode most of the time, resulting in a greatly reduced comprehensive operating benefit
These characteristics greatly limit the application range of traditional direct current ice melting devices

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
  • Resonant filter-based MMC DC deicing device and design method thereof
  • Resonant filter-based MMC DC deicing device and design method thereof
  • Resonant filter-based MMC DC deicing device and design method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The implementation will be described in detail below in conjunction with the accompanying drawings.

[0025] The structural diagram of a full-bridge type MMC DC deicing device based on a resonant filter of the present invention is as follows figure 1 As shown, it includes: connecting reactor L, full-bridge MMC based on resonant filter, ice-melting knife switch S1, S2, S3, S4; wherein, one end of connecting reactor L is connected to 35kV through isolating switch K and circuit breaker QF Or on the 10kV AC bus, the other end of the reactor L is connected to the AC side of the full-bridge MMC based on the resonant filter; one end of the ice-melting knife switch S1, S2 is connected to the DC side of the full-bridge MMC based on the resonant filter The positive poles are connected, and one end of the ice-melting knife gate S3 and S4 is connected to the negative pole of the DC side of the full-bridge MMC based on the resonant filter; the other end of the ice-melting knife gate...

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 belongs to the technical field of electric power system control, and in particular relates to a full-bridge type MMC DC deicing device based on a resonant filter and a design method thereof. The device includes sequentially connected circuit breakers, isolating switches, connecting reactors, full-bridge MMCs based on resonant filters, four ice-melting knife gates, and AC lines to be ice-melted. The method includes: determining the line coverage of the DC ice-melting device; calculating the ice-melting current of each conductor within the covered line range; calculating the DC voltage and DC power according to the ice-melting current and the ice-melting wiring mode; calculating the full-bridge type MMC DC ice-melting device The number of sub-modules; calculating the capacitance value of the sub-module capacitor of the full-bridge MMC DC deicing device; calculating the reactance value of the bridge arm reactor of the full-bridge MMC DC deicing device; calculating the parameters of the resonant filter.

Description

technical field [0001] The invention belongs to the technical field of electric power system control, and in particular relates to a full-bridge type MMC DC deicing device based on a resonant filter and a design method thereof. Background technique [0002] Among the natural disasters encountered by various power systems, ice and snow disasters are one of the most serious. Compared with other accidents, the losses caused by ice and snow disasters to the power grid are generally more serious, ranging from ice flashes to downed towers and broken lines, and even power network paralysis. [0003] At present, in order to improve the power grid's ability to resist ice and snow disasters, there are many methods and equipment for deicing and melting lines. The ice melting methods proposed at home and abroad are generally divided into four categories: thermal ice melting, mechanical deicing, natural passive deicing and other methods. Mechanical deicing is not easy to operate, and t...

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 Applications(China)
IPC IPC(8): H02G7/16
CPCH02G7/16
Inventor 赵成勇郭裕群周月宾傅闯许树楷许建中
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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