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Port crane energy storage type regenerative braking energy recovery structure and control method thereof

A technology of regenerative braking and energy recovery, which is applied in control/regulation systems, electric vehicles, and regulation of electric variables, etc., and can solve problems such as high price and bulky volume

Pending Publication Date: 2021-05-07
国海峰 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical applications, the switching frequency of the DC / DC converter can only be around 2kHz, which is bulky and expensive

Method used

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  • Port crane energy storage type regenerative braking energy recovery structure and control method thereof
  • Port crane energy storage type regenerative braking energy recovery structure and control method thereof
  • Port crane energy storage type regenerative braking energy recovery structure and control method thereof

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Embodiment Construction

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0042] refer to Figure 1-6 , an energy storage type energy absorption and feedback structure and control method for a port crane, comprising an input switch insurance unit, a main energy storage unit, a bidirectional DC / DC converter 1, an auxiliary energy storage unit, a bidirectional DC / DC converter 2, The control unit, filter capacitors C1, C2, inductor L1, and the input switch insurance unit play the role of overcurrent protection and switch isolation. The main energy storage unit and the auxiliary energy storage unit can be composed of supercapacitors or lithium batteries. The bidirectional DC / DC converter 1 has a BUCK / BOOST structure, and the bidirectional DC / ...

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PUM

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Abstract

The invention relates to the technical field of energy storage technology, and concretely relates to a port crane energy storage type energy absorption and feedback structure and a control method thereof. The structure comprises an input switch safety unit, a main energy storage electric unit, a bidirectional DC / DC converter 1, an auxiliary energy storage unit, a bidirectional DC / DC converter 2, a control unit, and filter capacitors C1, C2 and L1. The input switch safety unit plays roles of overcurrent protection and switch isolation. The main energy storage unit and the auxiliary energy storage unit can be respectively composed of super capacitors or lithium batteries, the bidirectional DC / DC converter 1 and the bidirectional DC / DC converter 2 are of a non-isolated BUCK / BOOST structure, the control unit controls the bidirectional DC / DC converter 1 and the bidirectional DC / DC converter 2, and PWM control is adopted. The conversion power of the bidirectional DC / DC converter is greatly reduced compared with a general full-power structure mode, and the conversion power is 20-30% of the conversion power of a classic structure. The product manufacturing cost is reduced, and the overall efficiency of the system is improved.

Description

technical field [0001] The invention relates to the technical field of energy storage technology, in particular to a port crane energy storage type regenerative braking energy recovery structure and control method. Background technique [0002] In the wharf crane power supply system, the AC grid and the standby generator jointly provide power for the crane (or the AC grid and the generator supply power separately). When the inverter is used to drive the motor, the alternating current is generally rectified into direct current (DC bus), and then power is supplied to each inverter to drive the motor. [0003] During the working process of the terminal container crane, when lifting, the weight of the container is an impact load for the power grid. In order to meet the needs of hoisting loads, the capacity of the power grid (or generator capacity) often needs to be configured according to the maximum load condition. On the other hand, during the falling process of the container...

Claims

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Application Information

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IPC IPC(8): H02M3/156H02M1/32H02J7/34H02J1/10
CPCH02J1/102H02J7/345H02M1/32H02M3/156H02J2207/20H02J2207/50
Inventor 国海峰孙力刘青山赵克段建东王帅
Owner 国海峰