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

Long-distance Medium Voltage DC Transmission System for Coal Mine

A direct current transmission, long-distance technology, applied in the direction of converting AC power input to DC power output, conversion equipment and electrical components that can be converted to DC without intermediate conversion, and can solve problems such as large terminal voltage drop and large line loss , to achieve the effect of easy control, low construction cost and cost, and low loss

Active Publication Date: 2021-03-09
SHANGHAI JIAO TONG UNIV
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the defects in the prior art, the object of the present invention is to propose a long-distance medium-voltage direct current transmission system suitable for coal mines that solves the problems of large terminal voltage drop and large line loss

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
  • Long-distance Medium Voltage DC Transmission System for Coal Mine
  • Long-distance Medium Voltage DC Transmission System for Coal Mine
  • Long-distance Medium Voltage DC Transmission System for Coal Mine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0056] Such as Figure 1 to Figure 22 As shown, the long-distance medium-voltage DC power transmission device under the coal mine provided by the present invention includes an AC power grid, a front-end power electronic rectifier device, a medium-voltage DC power transmission device, and a terminal power electronic inverter device;

[0057] Among them, the AC power grid is a relatively independent coal mine power supply network; the front-end power electronic rectification device includes a front-end AC...

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 present invention provides a long-distance medium-voltage DC power transmission system suitable for coal mines, including: a front-end power electronic rectifier device connected to an AC power grid; a medium-voltage DC power transmission device, the medium-voltage DC power transmission device It is connected with the front-end power electronic rectification device; the terminal power electronic inverter device is connected with the medium-voltage direct current transmission device. Compared with the prior art, the beneficial effects of the present invention are as follows: the front-end input is a low-voltage industrial-frequency AC power supply, the transmission process is a DC medium-voltage power supply, and DC or AC can be flexibly selected according to the type of load and the required voltage level for the power supply of the terminal load. The structure is flexible and can meet various load demands in coal mines, and its advantages include: smaller line loss; lower line construction costs; smaller high-frequency transformers with higher efficiency; no reactive power flow, power quality and The transmission efficiency is higher; there is no need to add reactive power compensation equipment.

Description

technical field [0001] The invention relates to a coal mine long-distance power transmission system, in particular to a long-distance medium-voltage DC power transmission system suitable for coal mines. Background technique [0002] There are a large number of coal mines in my country, most of which use their own dedicated substations, which are relatively independent power supply systems. With the increase in the number of coal mines and the continuous increase in the scale of coal mine power grids, it is becoming more and more difficult to control the safety and power consumption of coal mines. At present, most coal mines use AC distribution networks. With the gradual popularization of power electronic equipment such as high-voltage and high-power inverters and switching power supplies in coal mines, the AC power distribution method is becoming more and more difficult to meet the demand. The main problems include: : [0003] (1) The line loss is large. Long-distance lon...

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): H02J3/36H02M7/219H02M5/10H02M7/5387H02M7/483
CPCH02J3/36H02M5/10H02M7/219H02M7/483H02M7/5387H02M1/007Y02E60/60
Inventor 姜建国叶舒周中正刘贺刘聪李俊杰李洪亮
Owner SHANGHAI JIAO TONG UNIV
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