Reverse towing system and wind generating set

A wind turbine and electrical connection technology, applied in the field of converters, can solve problems such as weak load capacity, increased cost, current mismatch, etc., and achieve the effects of strong load capacity, reduced use, and stable output performance

Active Publication Date: 2020-09-15
ZHEJIANG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, the current of the inverter does not match the current of the rectifier side, and the load capacity is

Method used

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  • Reverse towing system and wind generating set
  • Reverse towing system and wind generating set
  • Reverse towing system and wind generating set

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides an anti-drag system, and the anti-drag system includes a converter. refer to figure 2 , the converter includes a first full bridge 101, a second full bridge 102, and a DC bus DC Link. The first full bridge 101 and the second full bridge 102 are electrically connected back to back through a DC bus, that is, the DC port of the first full bridge 101 is electrically connected to the DC port of the second full bridge 102 . The AC port of the first full bridge 101 is disconnected from the external AC power supply 2; the AC port of the first full bridge 101 is electrically connected to the AC port of the second full bridge 102; the DC bus DC Link is used to electrically connect to an external DC power supply Vin ; The AC port of the second full bridge 102 is used as the output terminal P2 of the anti-drag system.

[0043] When the AC port of the first full bridge 101 is electrically connected to the external AC power supply 2, the AC port of the fir...

Embodiment 2

[0046] On the basis of Embodiment 1, this embodiment provides an anti-drag system. refer to image 3 , in the converter of the anti-drag system, both the first full bridge and the second full bridge are three-phase full bridges. In other optional implementation manners, both the first full bridge and the second full bridge are single-phase full bridges, multi-phase full bridges, multi-level full bridges, and the like.

[0047] The converter of the reverse drag system is disconnected from the external AC power supply through the second switch module 103 . The second switch module 103 includes a first switch K1, a second switch K2, and a third switch K3.

[0048] The first full bridge 101 includes a first phase AC terminal, a second phase AC terminal, and a third phase AC terminal; the second full bridge 102 includes a first phase AC terminal, a second phase AC terminal, and a third phase AC terminal. The first phase AC terminal, the second phase AC terminal, and the third ph...

Embodiment 3

[0055] On the basis of Embodiment 2, this embodiment provides an anti-drag system. refer to Figure 4 , the anti-drag system further includes a first switch module 104 . The AC port of the first full bridge is electrically connected to the AC port of the second full bridge through the first switch module.

[0056] As an optional implementation manner, the anti-drag system further includes a second switch module 103 ; the AC port of the first full bridge is disconnected from the external AC power supply through the second switch module 103 .

[0057] The second switch module 103 includes a first switch K1, a second switch K2, and a third switch K3; the first switch module 104 includes a fourth switch K4, a fifth switch K5, and a sixth switch K6.

[0058] The output terminals of the anti-drag system include a first phase output terminal U, a second phase output terminal V, and a third phase output terminal W. The external AC power supply includes a first phase terminal, a sec...

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PUM

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Abstract

The invention discloses a reverse towing system and a wind generating set. The reverse towing system comprises a converter, wherein the converter comprises a first full bridge, a second full bridge and a direct current bus; the first full bridge and the second full bridge are connected back to back through a direct-current bus; the alternating current port of the first full bridge is disconnectedwith an external alternating current power supply; the alternating current port of the first full bridge is electrically connected with the alternating current port of the second full bridge; the direct-current bus is used for being electrically connected with an external direct-current power supply; and the alternating current port of the second full bridge is used as an output end of the reversetowing system. The reverse towing system provided by the invention has relatively strong loading capacity and can provide stable output performance.

Description

technical field [0001] The invention belongs to the technical field of converters, and in particular relates to an anti-drag system and a wind power generating set. Background technique [0002] A traditional back-to-back bidirectional converter such as figure 1 shown. The bidirectional converter is composed of full bridge A and full bridge B, and a DC bus DC Link. Full bridge A and full bridge B are set back to back, and full bridge A and full bridge B have the same components. The input end of the full bridge A is electrically connected to the grid Grid, and the three-phase output ends U, V, W of the full bridge B are electrically connected to the three-phase motor. When the bidirectional converter performs anti-dragging function, for example, when the three-phase motor needs to run under the condition of low speed and super large torque, the inverter current of the bidirectional converter exceeds its output capability, but the rectification side current is much smaller ...

Claims

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Application Information

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IPC IPC(8): H02M5/458F03D9/25H02J3/38
CPCH02M5/4585F03D9/25F03D9/255H02J3/381H02J2300/28Y02E10/72Y02E10/76H02M7/493H02M1/007F03D13/10
Inventor 刘嘉明吴立建杨帅王海洋缪骏金孝龙
Owner ZHEJIANG UNIV
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