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An exit method for multiple high-power converters running in series

A series operation, converter technology, applied in the direction of output power conversion device, electrical components, etc., to achieve the effect of easy implementation, convenient parameter adjustment, and lower measurement accuracy

Active Publication Date: 2017-08-08
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the existing technology is only for the control of two converters running in series, and there is no detailed research on the exit method for multiple series running of high-power converters

Method used

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  • An exit method for multiple high-power converters running in series
  • An exit method for multiple high-power converters running in series
  • An exit method for multiple high-power converters running in series

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Embodiment Construction

[0023] In order to better understand the technical solution of the present invention, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings:

[0024] For a schematic diagram of the exit plan, see figure 2 .

[0025] Such as figure 1 As shown, an exit method for multiple high-power converters running in series. The number of high-power converters is three for example, and the rated current is 1kA. When three high-power converters are running in series, the rated voltage u rate is 300V. The three converters are CU1, CU2 and CU3 respectively. The three-phase alternating current AC supplies power to the high-power converters CU1, CU2, and CU3 after two-by-two parallel rectification transformers T1, T2 or T3, T4 or T5, T6. The major power converters CU1, CU2, CU3 are respectively connected in parallel with a bypass BP1, BP2, BP3. The large power converters and bypasses are connected in parallel as a unit, and th...

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Abstract

The invention discloses an exit method for the serial operation of multiple high-power converters. When withdrawing, each high-power converter is reversed at the same time, so that the loop current rapidly decays. After the loop current is reduced to a fixed value , and then continue to invert for a certain period of time at regular intervals, so that the loop current can reach zero reliably, and then block the trigger pulse of the high-power converter, and the series converter can exit reliably. The method of the invention can realize the reliable and fast withdrawal of multiple high-power converters connected in series, and does not require high sensor accuracy; the method of the invention adopts controller program control, which is easy to realize and parameter adjustment.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of high-power converter power supply control, and relates to an exit method for multiple high-power converters running in series. [0003] Background technique: [0004] ITER (International Thermonuclear Experimental Reactor) PF (Polar Field) converter power supply is a necessary control means for plasma generation, confinement, maintenance, heating and plasma current, position, shape, distribution and rupture. The ITER PF converter power supply includes three operating modes: single bridge, double bridge and circular current, and can realize four-quadrant operation with a power up to 840 MW. It is the special power system with the largest power and the most complicated operation mode in the world today. The ITER PF converter has 14 sets of four-quadrant converter power supplies, which supply power to 6 PF superconducting coils at the same time. In order to reduce reactive power during design, three...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/088
CPCH02M1/088H02M1/007
Inventor 黄连生陈晓娇傅鹏高格何诗英王泽京
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI