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

AC/DC hybrid power distribution system and operation-in-fault method thereof

A technology for AC-DC hybrid and power distribution systems, which is applied in the direction of AC network circuits, electrical components, circuit devices, etc., and can solve the problem of low power flow transfer capability of AC-DC hybrid power distribution systems, failure to ensure normal transmission lines without faults, and failure to prevent faults AC feeder power supply and other issues

Active Publication Date: 2019-09-20
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
View PDF9 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current AC-DC hybrid power distribution system based on power electronics technology still has the following defects: First, the AC feeders in the AC-DC hybrid power distribution system are mainly connected through contact switches and run radially, causing each AC feeder to correspond to The load power supply circuit in the system is relatively single. When multiple AC feeder failures occur, it cannot be guaranteed that the non-faulty AC feeder in the system can continue to supply power to each AC feeder; second, the AC system and DC system in the AC-DC hybrid power distribution system Generally, the power coupling is performed through a VSC (voltage source converter) converter, resulting in a low power flow transfer capability of the AC-DC hybrid power distribution system. All non-fault transmission lines can supply power normally

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
  • AC/DC hybrid power distribution system and operation-in-fault method thereof
  • AC/DC hybrid power distribution system and operation-in-fault method thereof
  • AC/DC hybrid power distribution system and operation-in-fault method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0065] Example 1: A fault occurs between circuit breakers C4-C5 in the first AC feeder L3.

[0066] The fault operation method of the AC / DC hybrid power distribution system mainly includes the following steps:

[0067] Step 11: Control circuit breakers C4 and C5 to open.

[0068] Step 12: Obtain the non-faulty line ( image 3 The target power supply node that has a power supply relationship with the line connected to the circuit breaker C5-C6 and C13 is a flexible interconnection device.

[0069] Step 13: Supply power to the non-fault line corresponding to the first AC feeder L3 through the flexible interconnection device, that is, control the voltage and flow of the AC power in the first AC feeder L2, L5-L6 through the flexible interconnection device, so that the first AC feeder The AC power in L2, L5-L6 continues to supply power to the loads in the non-fault line corresponding to the first AC feeder L3.

[0070] In step 13 in this embodiment, when image 3 When the AC-DC...

example 2

[0071] Example 2: A fault occurs between circuit breakers C19-C20 in DC feeder L13.

[0072] The fault operation method of the AC / DC hybrid power distribution system mainly includes the following steps:

[0073] Step 21: Control circuit breakers C19 and C20 to open.

[0074] Step 22: Obtain the non-faulty line ( image 3 The target power supply node of the shown DC feeder L7) having a power supply relationship is the voltage source converter VSC1.

[0075] Step 23: Supply power to the non-fault line corresponding to the DC feeder L13 through the voltage source converter VSC1, that is, continue to supply power to the loads in the DC feeder L7 through the voltage source converter VSC1.

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 the technical field of power electronics and particularly provides an AC / DC hybrid power distribution system and an operation-in-fault method thereof to solve the technical problem of how to improve the power supply reliability of the AC / DC hybrid power distribution. The system provided by the invention comprises an AC power distribution subsystem, a DC power distribution subsystem, a voltage-source-type converter and a power electronic transformer, wherein the AC power distribution subsystem comprises a flexible interconnection device and a plurality of first AC feeder lines arranged between the flexible interconnection device and the low-voltage side of a first transformer. When the plurality of first AC feeder lines have faults, after fault points in the faulty feeder lines are cut off, the non-faulty remaining first AC feeder lines without faults can be controlled by the flexible interconnection device to supply power to non-faulty lines corresponding to the respective one of the faulty feeder lines. In addition, the DC power distribution subsystem performs power coupling with the AC power distribution subsystem through the voltage-source-type converter and the power electronic transformer, thereby further improving the power supply reliability of the AC / DC hybrid power distribution.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to an AC / DC hybrid power distribution system and a fault operation method thereof. Background technique [0002] With the gradual maturity of power electronics technology, the AC-DC hybrid power distribution system based on power electronics technology has also developed rapidly. However, the current AC-DC hybrid power distribution system based on power electronics technology still has the following defects: First, the AC feeders in the AC-DC hybrid power distribution system are mainly connected through contact switches and run radially, causing each AC feeder to correspond to The load power supply circuit in the system is relatively single. When multiple AC feeder failures occur, it cannot be guaranteed that the non-faulty AC feeder in the system can continue to supply power to each AC feeder; second, the AC system and DC system in the AC-DC hybrid power distribution syst...

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): H02J5/00H02J3/00
CPCH02J3/005H02J5/00
Inventor 杨艳红张释中裴玮邓卫叶华
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI