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A Clamp Submodule Topology

A technology of clamping sub-modules and topology, applied in the direction of output power conversion devices, electrical components, etc., can solve problems such as large losses, increased cost of converter stations, and difficulty in balancing the voltage of sub-unit capacitors.

Active Publication Date: 2018-09-11
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the control is more complicated, and the subunit capacitor voltage balance is more difficult
Although the full bridge sub-module (FBSM) also has DC blocking capability, the loss is large during normal operation, and the cost of the converter station is significantly increased

Method used

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  • A Clamp Submodule Topology
  • A Clamp Submodule Topology
  • A Clamp Submodule Topology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] like figure 1 As shown, a clamping sub-module topology includes a first half-bridge sub-unit 10 , a second half-bridge sub-unit 11 and a special connection unit 12 . The first lead-out terminal of the first half-bridge subunit 10 is used as the first lead-out terminal 1 of the clamp sub-module topology, and the second lead-out terminal 13 of the first half-bridge subunit 10 is connected to the special connection unit 11 to the second lead-out terminal 6. The third lead-out terminal 3 of the first half-bridge sub-unit 10 is connected to the first lead-out terminal 5 of the special connection unit 11 . The first lead-out terminal of the second half-bridge sub-unit 12 is used as the second lead-out terminal 2 of the clamp sub-module topology, the second lead-out terminal 14 of the second half-bridge sub-unit 12 is connected with the fourth lead-out terminal of the special connection unit 11 8 connections. The third lead-out terminal 4 of the second half-bridge subunit 1...

Embodiment 2

[0047] like figure 2 As shown, the diode D0 in the special connection unit is replaced by a series circuit of the diode D0 and the resistor R0.

Embodiment 3

[0049] image 3 Shown is another embodiment of the special connection unit 12. The special connection unit 12 of this structure includes a first diode D1, a second diode D2, a sixth fully-controlled semiconductor device T11, The seventh fully controlled semiconductor device T12 and the resistor R1. The anode of the first diode D1 is connected to the cathode of the second diode D2 as the first node 13 inside the special connection unit, and the cathode of the first diode D1 is used as the first lead-out terminal 5 of the special connection unit 12. The anode of the second diode D2 is used as the third lead-out terminal 7 of the special connection unit 12 . The collector of the sixth fully-controlled semiconductor device T11 is connected to the emitter of the seventh fully-controlled semiconductor device T12 as the second node 14 inside the special connection unit, and the emitter of the sixth fully-controlled semiconductor device T11 is used as a special connection unit The s...

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PUM

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Abstract

The invention discloses a clamping submodule topology, which comprises a first half-bridge subunit (10), a second half-bridge subunit (11) and a special linkage unit (12); the first half-bridge subunit (10) comprises a first capacitor bank (C1), a second capacitor bank (C2), a first fully controlled type semiconductor device (T1) and a second fully controlled type semiconductor device (T2); the second half-bridge subunit (11) comprises a third capacitor bank (C3), a fourth capacitor bank (C4), a third fully controlled type semiconductor device (T3) and a fourth fully controlled type semiconductor device (T4); the special linkage unit comprises a fifth fully controlled type semiconductor device (T0) and a diode (D0).

Description

technical field [0001] The present invention relates to a clamped submodule topology. Background technique [0002] Self-control of the converter is used to realize self-clearing of DC side faults without mechanical equipment action, so the system recovers quickly. Finding new converters with DC fault ride-through capability is currently a research hotspot in academia and industry. In 2010, ALSTOM proposed a variety of hybrid converters combining the structural characteristics of traditional two-level converters and MMCs at the International Conference on Large Power Grids. All level converters have DC fault ride-through capability. However, the control is relatively complicated, and the voltage balance of the subunit capacitors is relatively difficult. Although the full bridge sub-module (FBSM) also has the DC blocking capability, the loss is relatively large during normal operation, and the cost of the converter station is significantly increased. Contents of the inven...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/00H02M1/32
Inventor 朱晋韦统振霍群海孙栩班连庚王华伟雷霄
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI