Unlock instant, AI-driven research and patent intelligence for your innovation.

Flexible direct current power transmission system

A technology of power transmission system and flexible DC, which is applied in AC network circuits, wind power generation, electrical components, etc., can solve the problem of high cost, achieve the effect of small footprint, realize decoupling control, and improve power quality

Pending Publication Date: 2021-12-10
CHINA EPRI ELECTRIC POWER ENG CO LTD +4
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned disadvantages of high cost in the prior art, the present application provides a flexible direct current transmission system, including a sending end converter station connected to multiple wind farms, a direct current transmission line and a receiving end converter station, the sending end The converter station is connected to the receiving-end converter station through the direct current transmission line;

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
  • Flexible direct current power transmission system
  • Flexible direct current power transmission system
  • Flexible direct current power transmission system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The application will be described in further detail below in conjunction with the accompanying drawings.

[0035] The embodiment of the present application provides a flexible direct current transmission system, such as figure 1 and figure 2 As shown, it includes the sending-end converter station, the DC transmission line and the receiving-end converter station connected to multiple wind farms. The sending-end converter station is connected to the receiving-end converter station through the DC transmission line.

[0036] In the embodiment of the present application, the diode rectifier may be a 12-pulse diode rectifier.

[0037] Optionally, the direct current transmission line includes a positive direct current transmission line, a negative direct current transmission line and a neutral line. Positive DC transmission lines and negative DC transmission lines can use ±400kV DC submarine cables.

[0038] It can be understood that an output end of the sending-end conver...

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

A flexible direct current power transmission system provided by the present invention comprises a sending-end converter station connected with a plurality of wind power plants, a direct current power transmission line and a receiving-end converter station, the sending-end converter station is connected with the receiving-end converter station through the direct current power transmission line, and the sending-end converter station comprises a diode rectifier and a first modular multilevel converter which are connected in series. According to the invention, a mixed structure of the diode rectifier and the first modular multilevel converter is adopted, so that the occupied area of the sending-end converter station can be reduced, and the economic cost of the sending-end converter station and the sending-end converter platform caused by the enlargement of the scale of a far-coast electric field and the increase of the capacity of a single machine can be reduced. And the system can be used for joint sending of a plurality of far-coast wind power plants.

Description

technical field [0001] The present application relates to the technical field of direct current transmission, in particular to a flexible direct current transmission system. Background technique [0002] In recent years, the development direction of global offshore wind farms has shifted to the deep sea field. With the continuous expansion of the scale of offshore wind farms, the capacity of a single wind turbine has gradually increased from the general 4MW to 15MW, and continues to show a growing trend. Due to the wide distribution of offshore wind resources, a combination of multiple far-coast wind farms is generally used to realize the delivery of far-coast wind power resources. [0003] At present, the flexible DC transmission system based on symmetrical unipolar is usually used to realize the transmission of wind power resources in the far coast. The flexible HVDC topology based on symmetrical unipolar usually adopts modular multilevel converter (MMC), which can contr...

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): H02J3/36H02J3/38
CPCH02J3/36H02J3/381H02J2300/28Y02E10/76Y02E60/60
Inventor 厍冬瑾赵波李奇南王轩张帆薄鑫吴倩
Owner CHINA EPRI ELECTRIC POWER ENG CO LTD