Converter valve testing system and method

Abstract

The invention discloses a converter valve testing system and method. The converter valve testing system comprises trigger signal control equipment and converter valve testing equipment, wherein the trigger signal control equipment is connected with valve-based electronic equipment and used for controlling the valve-based electronic equipment to output a light trigger signal, the light trigger signal is used for triggering a thyristor level to be tested to be conductive, and the thyristor level to be tested is any thyristor level in a converter valve to be tested; and the converter valve testing equipment is connected with the thyristor level to be tested in a contact mode, and is used for applying testing voltage signals to two ends of the thyristor level to be tested, collecting forward conduction voltage signals and / or reverse blocking voltage signals of the thyristor level to be tested and determining whether the thyristor level to be tested is damaged or not according to the collected forward conduction voltage signals and / or the reverse blocking voltage signals. According to the converter valve testing system and method, the thyristor level testing in the converter valve can be rapidly completed without plugging and unplugging cables and optical fibers, and the testing efficiency is improved.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a test system and a test method for a converter valve. Background technique [0002] This section is intended to provide a background or context to embodiments of the invention that are recited in the claims. The descriptions herein are not admitted to be prior art by inclusion in this section. [0003] Converter valve, also known as thyristor valve, as an important component in high-voltage direct current transmission project, is a kind of power equipment based on thyristor series technology for electric energy conversion. The thyristor is the core component of the converter valve, which determines the flow capacity of the converter valve, and the desired system voltage can be obtained by connecting multiple thyristor elements in series. Due to the high voltage level of HVDC transmission, the converter valve is usually composed of multi-level thyristors connected in series. The t...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a test system for a converter valve, which is used to solve the problem that in the prior art, when testing the thyristor in the converter valve, it is necessary to plug and unplug cables and optical fibers to complete the entire test, resulting in cumbersome operations and potential safety hazards technical problem, the system includes: trigger signal control equipment, connected with the valve base electronic equipment, used to control the valve base electronic equipment to output light trigger signal, wherein the light trigger signal is used to trigger the conduction of the thyristor stage under test, and the thyristor under test The stage is any thyristor stage in the converter valve to be tested; the converter valve test equipment is connected with the thyristor stage to be tested in a contact manner, and is used to apply a test voltage signal to both ends of the thyristor stage to be tested, and to collect the thyristor stage to be tested. Measure the forward conduction voltage signal and / or reverse blocking voltage signal of the thyristor stage, and determine whether the thyristor stage under test is damaged according to the collected forward conduction voltage signal and / or reverse blocking voltage signal

[0006] The embodiment of the present invention also provides a test method for a converter valve, which is applied to the above-mentioned test system for a converter valve to solve the problem of plugging and unplugging cables and optical fibers when testing the thyristors in the converter valve in the prior art. Complete the entire test, resulting in cumbersome operations and technical problems with potential safety hazards. The method includes: when the test voltage signal applied by the converter valve test equipment to both ends of the thyristor stage to be tested is a positive voltage, the device is controlled by the trigger signal. The valve-based electronic equipment outputs an optical trigger signal; the forward conduction voltage signal and / or reverse blocking voltage signal of the thyristor stage to be tested is collected through the converter valve test equipment, and according to the collected forward conduction voltage signal and / or reverse Block the voltage signal to determine whether the thyristor stage under test is damaged

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