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Composite energy consumption device switch sub-module and protection method thereof

An energy-consuming device and switch technology, which is applied to output power conversion devices, electrical components, etc., can solve problems such as shell melting loss, energy-consuming device breakage, and MOV resistance chip cracking.

Active Publication Date: 2021-09-14
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

MOV resistors are cracked, the casing is melted, and a large amount of smoke, sparks and arcs are emitted from the pressure relief hole, which will seriously affect other components of the switch sub-module of the energy consumption device, especially the more sensitive semiconductor switch, and may eventually lead to the loss of the entire energy consumption device. The energy device is broken during energy consumption

Method used

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  • Composite energy consumption device switch sub-module and protection method thereof
  • Composite energy consumption device switch sub-module and protection method thereof
  • Composite energy consumption device switch sub-module and protection method thereof

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Embodiment Construction

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] In the switch submodule of the composite energy consumption device according to the embodiment of the present invention, the switch submodule includes: a thyristor branch, a static voltage equalizing branch and a voltage clamping branch; wherein the thyristor branch, the static voltage equalizing branch The circuit is c...

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Abstract

The invention discloses a composite energy consumption device switch sub-module and a protection method thereof. The switch sub-module comprises a thyristor branch, a static voltage-sharing branch and a voltage clamping branch. The thyristor branch, the static voltage-sharing branch and the voltage clamping branch are connected in parallel. The problem that the damage rate is increased due to the fact that the devices bear different voltages can be avoided, the problem caused by the failure to operate of a single sub-module is solved, and the situation that the whole energy consumption device is broken and damaged in the energy consumption period due to the fact that the metal oxide lightning arrester is damaged is also avoided.

Description

technical field [0001] The invention belongs to the field of direct current transmission, and in particular relates to a switch submodule of a composite energy consumption device and a protection method thereof. Background technique [0002] The DC energy consumption device is an important equipment used to protect the safe and stable operation of the HVDC power transmission system (modularmultilevel converterbased high voltage direct current, MMC-HVDC system) based on the modular multilevel converter. During a fault, the surplus power of the system is consumed through the energy-dissipating resistor inside the device, so as to avoid serious consequences caused by the accumulation of system energy in the capacitance of the modular multilevel converter (MMC) converter valve sub-module. [0003] The resistance centralized DC energy consumption device is a structure that uses a large number of high-power semiconductor switch sub-modules and a centralized energy consumption resi...

Claims

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Application Information

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IPC IPC(8): H02M1/32
CPCH02M1/32
Inventor 余占清陈政宇刘宇畅许超群屈鲁
Owner TSINGHUA UNIV
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