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Cascaded converter-based multifunctional high-speed switch device

A fast switch and converter technology, applied in the direction of output power conversion devices, circuit devices, electrical components, etc.

Active Publication Date: 2014-04-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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Embodiment Construction

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

[0032] Such as figure 1 Shown is a multifunctional fast switching device based on cascaded converters, 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 parallel with the auxiliary switch K2 after being connected in series with the auxiliary switch K1 and the auxiliary switch K3.

[0033] By controlling the auxiliary switch to cooperate with conduction, the switch device can work in different states, that is, normal state, maintenance state and debugging state: when the auxiliary switch K1 and auxiliary switch K3 are closed, and the auxiliary switch K2 is turned off, the switch ...

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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 electronics technology in power systems, in particular to a multifunctional fast switching device based on cascaded converters. Background technique [0002] In recent years, with the economic development and the wide application of high-tech equipment, users have continuously improved the quality of power supply, and the problem of power quality has become increasingly prominent. Power quality problems include two aspects: steady-state power quality and transient power quality, which directly affect the power supply security 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, the transient power quality problem has brought new challenges to the power supply quality. [0003] In order to ensure uninterrupted power supply, a traditional solution is to switch sensitive loads to the backup power source through mechan...

Claims

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Application Information

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