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Load current adjustable flexible DC half-bridge module short circuit test loop and test method

A technology of load current and short-circuit test, applied in circuit breaker testing, measuring electricity, measuring electrical variables, etc., can solve problems such as inability to meet engineering needs, and achieve the effect of improving anti-electromagnetic interference capability, high test efficiency, and flexible adjustment

Pending Publication Date: 2022-03-01
TBEA XIAN FLEXIBLE TRANSMISSION & DISTRIBUTIONCO +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the flexible direct transmission project, in practice, it is mostly in load operation. During this process, the power module has operating current and operating temperature. The traditional test method can no longer meet the actual engineering needs.

Method used

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  • Load current adjustable flexible DC half-bridge module short circuit test loop and test method
  • Load current adjustable flexible DC half-bridge module short circuit test loop and test method

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Embodiment Construction

[0031] In order to make the purpose and technical solution of the present invention clearer and easier to understand. The present invention will be further described in detail below in conjunction with the drawings and embodiments. The specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0032] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular ori...

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Abstract

The invention discloses a load current adjustable flexible direct current half-bridge module short circuit test loop and test method, the test loop comprises a main control system, a high voltage direct current power supply, a pulse distribution board and a load loop, the main control system is connected with the high voltage direct current power supply and the pulse distribution board; a logic control instruction is provided for the high-voltage direct-current power supply and the pulse distribution board; the high-voltage direct-current power supply is connected with the power module and performs direct-current charging on the power module; the pulse distribution board is connected with a driver of a switching tube T1 of the power module, a driver of a switching tube T2 and a driver of a switching tube Ts of the load loop, and provides on / off instructions for the three switching tubes. On the premise that the structure of the half-bridge power module is not changed, the power module can be guaranteed to reach the operating temperature and the operating current value, and the short-circuit test of the power module is completed.

Description

technical field [0001] The invention belongs to the technical field of short-circuit test of flexible straight half-bridge modules, and in particular relates to a short-circuit test circuit and a test method of a flexible straight half-bridge module with adjustable load current. Background technique [0002] Modular multilevel converter based HVDC (MMC-HVDC) technology is a new type of DC transmission technology for voltage source converters, which has high modularity, easy expansion, low loss, The unique advantages of low switching frequency, small output voltage harmonic distortion and simple structure have been widely adopted and applied in the fields of new energy grid connection, island power supply, asynchronous networking, multi-terminal DC transmission and urban distribution network capacity expansion. [0003] The power module is the basic unit of the MMC converter valve, and its reliability has become one of the key factors affecting the safe and reliable operation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R31/327
CPCG01R31/00G01R31/327
Inventor 谢文杰付晓峰盛俊毅蔺广科王召
Owner TBEA XIAN FLEXIBLE TRANSMISSION & DISTRIBUTIONCO
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