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Direct-current energy consumption device

An energy-consuming device and energy-consuming unit technology, applied in circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve the problems of device damage, high cost, complex structure, etc. , to achieve the effect of reducing power shock, reducing system cost and simplifying device structure

Pending Publication Date: 2021-05-11
XIAN XJ POWER ELECTRONICS TECH +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a DC energy consumption device, which solves the problem of complex structure and high cost when the existing DC energy consumption device solves the problem of device damage caused by the asynchronous shutdown of power semiconductor switching devices

Method used

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention, that is, the described embodiments are only some of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

[0027] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the...

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Abstract

The invention relates to a direct current energy consumption device, and the device comprises at least one energy consumption unit; the energy consumption units are connected in series, each energy consumption unit comprises an energy consumption branch and at least two energy consumption sub-modules, the energy consumption branch is formed by connecting a first switching device and an energy consumption resistor in series, and each energy consumption sub-module comprises an energy storage capacitor. The input ends of the energy consumption sub-modules are connected in series, and the output ends of the energy consumption sub-modules are connected in parallel and then connected with the energy consumption branch. According to the invention, the risk of device damage caused by inconsistent switching-on and switching-off in a direct series connection scheme of power semiconductor devices is avoided, the direct-current voltage stability in the power discharge period is good, the power impact in the discharge process can be reduced, a plurality of energy consumption sub-modules share one energy consumption branch, the device structure is greatly simplified, and the system cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of high-voltage direct current transmission, and in particular relates to a direct current energy consumption device. Background technique [0002] Flexible DC transmission technology has the advantages of no commutation failure, low voltage harmonic content, high waveform quality, and rapid adjustment of active power and reactive power. These technical advantages make the flexible DC technology have a wide range of application requirements in the power system, such as the access, collection and transmission of large-scale clean energy, and island passive load power supply. When the flexible direct current is applied to the new energy system for transmission, when the power receiving end fails and the voltage of the AC grid drops, the active power cannot be sent or can only be partially sent to the AC grid. The surplus active power will cause the voltage of the DC transmission line to rise, which will harm ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04
CPCH02H9/045
Inventor 刘欣和李道洋张军张浩王先为吴金龙杨美娟韩坤夏克鹏刘启建祁招关更生马莉
Owner XIAN XJ POWER ELECTRONICS TECH
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