A multi-institution coordinated regenerative braking energy utilization system and its control method

A technology of regenerative braking and control method, which is applied in the direction of AC network with the same frequency from different sources, power lines, AC network load balancing, etc., can solve the problems of large investment cost and limited effect of regenerative energy utilization, and achieve high utilization rate, achieve reduction, and achieve the effect of load fluctuation

Active Publication Date: 2022-01-28
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology is mainly aimed at the utilization of regenerative energy within a single traction substation. When applied to the scene of multiple traction substations, due to the independence of each substation, the effect of regenerative energy utilization is limited, and there is a large investment cost.

Method used

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  • A multi-institution coordinated regenerative braking energy utilization system and its control method
  • A multi-institution coordinated regenerative braking energy utilization system and its control method
  • A multi-institution coordinated regenerative braking energy utilization system and its control method

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Experimental program
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Effect test

Embodiment

[0179] During energy control, set the SoC min 0.1, SoC max is 0.9, P max.dis 5MW, P ex-L 1MW.

[0180] In step 1, detect the left and right power supply arms of each substation, the power flow control equipment of each substation, and the power flow control equipment in substation II through the distributed voltage and current detection devices installed in the substation / divisional substation , Real-time voltage and current signals of the energy storage system;

[0181] In step 2, the detection power is calculated to obtain: P in traction substation I FL1 2MW, P FR1 1MW, P in traction substation II FL2 3MW, P FR2 1MW, P in traction substation III FL3 -3MW, P FR3 is 1.5MW, the power flow control device I transfers power P trans1 = 2MW, transfer power P of power flow control equipment III trans3 =-1MW, the discharge power of the energy storage system is 3MW; in addition, the SoC is 0.5.

[0182] The internal load power of each traction substation can be calculated a...

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Abstract

A multi-coordinated regenerative braking energy utilization system and its control method, including power flow control equipment I, power flow control equipment II, and power flow control equipment III composed of left and right four-quadrant converters with a common DC link; wherein, the power flow control The left AC port and the right AC port of equipment I are respectively connected to the right power supply arm I and left power supply arm II of substation I, and the left AC port and right AC port of power flow control equipment II are respectively connected to the left power supply arm of substation II. The power supply arm II and the right power supply arm II, the left AC port and the right AC port of the power flow control device III are respectively connected to the right power supply arm II and the left power supply arm III of the partition office II; also includes the DC link connected to the power flow control device II energy storage system. The invention utilizes power flow control equipment to perform power transfer, enabling power exchange between multiple substations, increasing regenerative braking energy utilization paths; performing power flow planning for different modes, which can improve regenerative braking energy utilization efficiency.

Description

technical field [0001] The invention relates to the field of electrified railway traction power supply systems, in particular to a multi-station coordinated regenerative braking energy utilization system and a control method thereof. Background technique [0002] In recent years, in my country's electrified railways, modern AC drive locomotives using regenerative braking have been used on a large scale, making the traction power supply system contain a large amount of regenerative braking energy. At present, a large amount of regenerative energy is directly returned to the power system, which reduces the energy utilization efficiency of the railway system; and because the power quality of the regenerative braking energy directly returned to the power system is not high, the power system usually adopts the charging method of ignoring the return or adding the return. , making the operating costs of the railway sector increase. With the promotion of heavy-duty electrified rail...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60M3/00B60M3/06H02J3/06H02J3/32
CPCB60M3/00B60M3/06H02J3/06H02J3/32
Inventor 胡海涛黄毅陈俊宇葛银波王科何正友
Owner SOUTHWEST JIAOTONG UNIV
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