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Cascaded converter-based multifunctional high-speed switch device

A technology of fast switching and switching devices, which is applied in the direction of output power conversion devices, circuit devices, electrical components, etc.

Active Publication Date: 2012-03-14
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the current solid-state switches are low-voltage and low-current, and are used as reactive power compensation and UPS (Uninterruptible Power Supply, uninterruptible power supply) device power switching, but there are few devices suitable for medium and high voltages of 10kv and above

Method used

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  • Cascaded converter-based multifunctional high-speed switch device

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Embodiment Construction

[0031] The present invention will be further explained below in conjunction with the drawings.

[0032] Such as figure 1 Shown is a multifunctional fast switching device based on a cascade converter, including a main switch module and three auxiliary switches, the three auxiliary switches are auxiliary switch K1, auxiliary switch K2, and auxiliary switch K3; The main switch module is connected to the power supply through the auxiliary switch K1, and connected to the load through the auxiliary switch K3. The main switch module is connected in series with the auxiliary switch K1 and the auxiliary switch K3 and then connected in parallel with the auxiliary switch K2.

[0033] By controlling the auxiliary switch to be turned on, the switching device can be operated in different states, namely normal state, maintenance state and debugging state: when the auxiliary switch K1 and auxiliary switch K3 are closed, and the auxiliary switch K2 is disconnected, the switch device is in normal In...

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PUM

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Abstract

The invention discloses a cascaded converter-based multifunctional high-speed switch device which structurally comprises a main switch module, an auxiliary switch K1, an auxiliary switch K2 and an auxiliary switch K3; the main switch module is connected with a power source by the auxiliary switch K1 and is connected with a load by the auxiliary switch K3, and the main switch module is connected with the auxiliary switch K1 and the auxiliary switch K3 with each other in series and is connected with the auxiliary switch K2 in parallel with each other; and the main switch module comprises a cascaded H bridge converter and a wave filtering link, an output end of the cascaded H bridge converter is connected with the wave filtering link, and the cascaded H bridge converter comprises n H bridge converter cascaded units which are connected with one another in series. The cascaded converter-based multifunctional high-speed switch device is flexibly applicable to various connection modes between the power source and the load, has various functions of superspeed switching, voltage compensating, fault current limiting and the like, and is applicable to the middle and high voltage occasion due to a cascaded structure.

Description

Technical field [0001] The invention relates to the application of power electronic technology in a power system, in particular to a multifunctional fast switching device based on a cascade converter. Background technique [0002] In recent years, with economic development and the widespread use of high-tech equipment, users have continuously improved power supply quality requirements, and power quality problems have become increasingly prominent. Power quality issues include steady-state power quality and transient power quality, which directly affect the power supply safety of the power system and the normal operation of user equipment. In recent years, as a large number of sensitive loads have been put into use, transient power quality problems have brought new challenges to power supply quality. [0003] In order to ensure uninterrupted power supply, a traditional solution is to switch the sensitive load to the backup power supply through a mechanical switch or thyristor when ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06H02M1/00
Inventor 赵剑锋姚佳王梦蔚
Owner SOUTHEAST UNIV
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