A test device and method for short-circuit current of mmc-hvdc flexible DC power module

Abstract

The invention discloses an MMC-HVDC flexible DC power module short-circuit current test device and method, and aims at solving the problems that short-circuit protection of a driving board is performed due to the fact that current rate of rise of full-controlled devices in a flexible DC power module exceeds the standard. The adopted technical scheme is that the MMC-HVDC flexible DC power module short-circuit current test device comprises an adjustable DC power supply (1) which is connected with a flexible DC power transmission converter valve power module. The flexible DC power transmission converter valve power module comprises a capacitor (3), a top tube full-controlled device (5) and a down tube full-controlled device (8) which are mutually connected. The down tube full-controlled device (8) is provided with a load inductor (9) used for short-circuit connection of the down tube full-controlled device (8). The top tube full-controlled device (5) and the down tube full-controlled device (8) are respectively connected with a PMC board (11) via the driving board. The adjustable DC power supply (1), the flexible DC power transmission converter valve power module, the PMC board (11) and the driving board are connected with a control console which can complete DC voltage boosting and reducing and control protection operation.

Description

technical field [0001] The invention relates to a power module test device, in particular to a device and method for a short-circuit test of an MMC-HVDC flexible DC power module. Background technique [0002] Traditional thyristor direct current transmission has mature and reliable short-circuit current protection and over-current protection that limit di / dt. The flexible direct current transmission converter valve adopts a full-control device. The full-control device can control its current conduction and control its current shutdown. Familiar with the principle of the flexible direct current transmission converter valve power module type test, how to realize the full control It is a more complicated technical problem than the traditional thyristor DC transmission to protect the overcurrent protection of the power module of the type device and to inspect the power module. The existing flexible DC transmission power modules do not have reliable and mature full-control devic...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems in the prior art, the present invention proposes a test device for the short-circuit current of the MMC-HVDC flexible DC power module, which solves the problem of short-circuit protection of the full-control device in the flexible DC power module due to the current rise rate exceeding the limit. and methods

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