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A test circuit and method for a converter valve module

A technology of converter valve module and test method, which is applied in the direction of circuit breaker testing, measuring electricity, measuring electrical variables, etc., can solve the problems of difficult circuit construction, multi-level converter valve voltage level, high capacity, etc., and achieve test The method is practical, convenient for bypass testing, and convenient for judging the effect

Active Publication Date: 2020-03-20
NR ELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The voltage level and capacity of the modular multi-level converter valve are relatively high, so it is difficult to construct a circuit in the test environment that is the same as the actual operating condition, and conduct a bypass test of the converter valve module

Method used

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  • A test circuit and method for a converter valve module
  • A test circuit and method for a converter valve module
  • A test circuit and method for a converter valve module

Examples

Experimental program
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Embodiment Construction

[0031] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0032] The invention provides a test method for a converter valve module, which is used to examine the integrity of the designed, produced, manufactured and assembled converter valve module bypass switch and its trigger circuit.

[0033] The converter valve of the modular multilevel converter adopts a modular design, which is composed of several converter valve modules with the same structure connected in series. The structure of the converter valve is as follows: figure 1 As shown, the structure of the converter valve module is as follows figure 2As shown, it includes the first turn-off semiconductor T1, the first freewheeling diode D1 anti-parallel to the first turn-off semiconductor T1, the second turn-off semiconductor T2, and the first turn-off semiconductor T2 anti-parallel Two freewheeling diode D2, bypass switch K, thyristor SCR, ...

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Abstract

The invention discloses a testing circuit and method for a converter valve module, and the converter valve module is a power module of a half-bridge structure, and comprises two switchable semiconductors (T1, T2), an energy storage capacitor (C1), and a bypass switch (K). A controllable rechargeable power supply is employed for the live-line switching-on bypass test of the bypass switch (K) of the converter valve module. Through the control of the on / off time of a semiconductor switch unit of the controllable rechargeable power supply and a switchable power semiconductor of the converter valve module, the current size and direction can be controlled during the switching-on of the bypass switch. The testing method can achieve the equivalent simulation of the switching-on working condition of the bypass switch of the converter valve module in the actual operation, can be used for the detection of the bypass switches of designed, produced, manufactured and assembled converter valve modules and the integrity of triggering circuits.

Description

technical field [0001] The invention belongs to the field of flexible AC-DC power transmission, and in particular relates to a test circuit and method for a converter valve module. Background technique [0002] The core of the flexible DC transmission system is the voltage source converter based on fully controlled devices. Multi-level technology is the optimal solution for realizing high-voltage and large-capacity voltage source converters. Compared with the two-level converter, the multi-level converter can use low-voltage devices to achieve high-voltage level output without direct series connection of switching devices. In recent years, the emergence of Modular Multilevel Converter (MMC) has enabled the successful application of MMC in the field of flexible DC transmission. [0003] The converter valve of the modular multilevel converter adopts a modular design, and is composed of several converter valve modules with the same structure connected in series. In the actua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/327
CPCG01R31/3277
Inventor 姜田贵谢晔源朱铭炼段军欧阳有鹏连建阳殷冠贤刘洪德
Owner NR ELECTRIC CO LTD
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