System for carrying out closed loop test by utilizing transmission system converter transformer protector and corresponding method

Abstract

The invention relates to a system for carrying out closed loop test by utilizing transmission system converter transformer protector and a method thereof. The system comprises a real-time simulation workstation of a direct current transmission system real-time simulation model, an RTDS real-time digital simulator carrying out real-time calculation on the simulation model, an analog quantity output card, a power amplifier, a converter transformer protector, a digital quantity output card, a digital quantity input card and a direct current transmission control protector; wherein the real-time simulation workstation is connected with the RTDS real-time digital simulator, the RTDS real-time digital simulator transmits current and voltage signals to the converter transformer protector by virtue of the analog quantity output card and the power amplifier, and the RTDS real-time digital simulator transmits a gear signal of the tap of the converter transformer to the converter transformer protector, the converter transformer protector transmits tripping and alarm signals to the RTDS real-time digital simulator by virtue of the digital quantity input card, and the direct current transmission control protector is connected with the RTDS real-time digital simulator. The system test of the invention is flexible, and multiple tests can be carried out. The test method of the invention is simple to operation and is convenient and practical.

Description

technical field [0001] The invention relates to a system and method for performing closed-loop test on a converter transformer protection device in a power transmission system, in particular to a system and method for performing a real-time digital closed-loop test on a converter transformer protection device in a double 12-pulse direct current transmission system, which belongs to the power transmission system converter Transformation technology of system and method for closed-loop test of DC transformer protection device. Background technique [0002] The converter transformer is the key equipment for AC-DC conversion in the DC transmission system. The safe and stable operation of the converter transformer is of great significance to improve the reliability and availability of the DC system. Converter transformer protection As the protection device of the converter transformer, its performance directly affects the safe and stable operation of the converter transformer and ...

AI Technical Summary

Problems solved by technology

[0003] However, at present, there is still a lack of effective inspection methods for converter transformer protection devices at home and abroad. The traditional converter transformer protection inspection methods have inherent defects. , it is difficult to simulate converter transformers with different structures and characteristics, and the test is not flexible, and the types of tests that can be carried out are limited; for converter transformer protection recording and playback tests, it is difficult to find a suitable signal source, and the physical quantity of playback is also limited, and only open loop test

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