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Quitting method for series operation of multiple large-power converters

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

Active Publication Date: 2016-04-20
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

[0004] 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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  • Quitting method for series operation of multiple large-power converters
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  • Quitting method for series operation of multiple large-power converters

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Embodiment Construction

[0018] 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:

[0019] For a schematic diagram of the exit plan, see figure 2 .

[0020] 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 a quitting method for series operation of multiple large-power converters. In the quitting process, all the large-power converters are inverted at the same time, the loop current quickly declines, inverting continues for a certain time in a timing mode after the loop current is reduced to a fixed value, the trigger pulses of the large-power converters are locked after 100% reliability of the loop current is achieved, and the converters in series connection can be reliably quitted. By means of the method, the multiple large-power converters in series connection can be reliably and quickly quitted, and the requirement for the precision of sensors is not high. According to the method, program control is achieved through a controller, implementation is easy, and parameters can be easily adjusted.

Description

Technical field: [0001] 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. Background technique: [0002] 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 ITERPF converter power supply includes three operating modes: single bridge, double bridge and circular current, and can realize four-quadrant operation with a power of 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 ITERPF 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 high-power co...

Claims

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Application Information

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Patent Type & Authority Applications(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