Cascade active voltage-stabilizing controller of power switch

A technology of series voltage equalization and control devices, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of poor voltage equalization consistency and controllability, large power loss of voltage equalization resistors, etc., and achieve stable voltage equalization. , The effect of strong pressure equalization control ability and wide selection range

Inactive Publication Date: 2007-09-05
HEFEI UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, since the leakage current flowing through the parallel resistors is 5 to 10 times the leakage current of the power module, a better static voltage equalization effect can be achieved, so the power loss of the voltage equalization resistors is relatively large
RC or RCD snubber circuit can contribute to dynamic voltage equalization, but it belongs to passive control, and the consistency and controllability of voltage equalization are not good

Method used

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  • Cascade active voltage-stabilizing controller of power switch
  • Cascade active voltage-stabilizing controller of power switch
  • Cascade active voltage-stabilizing controller of power switch

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Embodiment Construction

[0020] Refer to Figure 1. For each power module working in series, an active voltage equalization absorption module M1 is set, and the active voltage equalization absorption module M1 is connected in parallel to each main power tube V i-j C, E end, where i=1~n; j=1~2; set the drive control module M2 to connect the output control signal of the drive control module M2 to each power module and the active voltage equalization absorption module M1.

[0021] Refer to Figure 2, in the active voltage equalization module M1, set a bleeder power tube V2, the E end of the bleeder power tube V2 is connected to the E end of the main power tube, and the C side of the bleeder power tube V2 is connected to the recovery resistor R1 The reverse end of diode D2 is connected to the main power tube V with the forward end of fast recovery diode D2 i-j The C terminal of the fast recovery diode D2 and the E terminal of the bleeder power tube V2 are respectively connected across the absorption capacitor C...

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Abstract

The invention is concerned with the active series connection equal-press controlling equipment for the power switch, the characteristic is: sets the active equal-press absorb module for the series power module, the active equal-press absorb module crosses and parallel connects with the C and E end of each main power tube Vi-j; sets the driving controlling module, the outputting controlling signal of the driving controlling module accesses each power module and the active equal-press absorb module. The invention is lower power consumption, simple circuit.

Description

Technical field [0001] The invention relates to a power protection device, and more specifically to a protection device for a medium and high voltage power converter applied in the fields of power electronics and power transmission. Background technique [0002] The rapid development of modern industrial technology and computer technology. The medium and high voltage power conversion system with high-power power electronic full control devices as the core is used in high-voltage direct current transmission and reactive power compensation, high-power power transmission, large-scale wind power generation and large-scale solar photovoltaic power generation. The system has been widely used and has become a key equipment in energy saving and new renewable energy systems. However, the main circuit power switching device of the existing medium and high voltage power conversion system is sometimes difficult to meet the voltage and power requirements of the syst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/10H02H7/22
Inventor 张国荣苏建徽茆美琴汪海宁张健杜燕
Owner HEFEI UNIV OF TECH
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