Test circuit and method for testing on-off characteristics of converter valve

A technology for switching on and off and testing circuits, which is applied in the directions of measuring electricity, measuring electrical variables, circuit breaker testing, etc., and can solve the problems of poor test equivalence, inability to turn on and off characteristic tests, and inability to simulate the voltage of UHV converter valves. and other problems, to achieve the effect of simple timing control

Active Publication Date: 2020-08-21
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the fact that the test device in the prior art cannot simulate the voltage of the UHV converter valve when it is turned on or off, and thus cannot con

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  • Test circuit and method for testing on-off characteristics of converter valve
  • Test circuit and method for testing on-off characteristics of converter valve

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Embodiment Construction

[0018] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, ...

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Abstract

The invention discloses a test circuit and method for testing the on-off characteristics of a converter valve. In the test circuit, the positive electrode of a DC power supply in an energy supplementloop is connected to the anode of a first thyristor; one end of a recovery valve in a recovery loop is connected to one end of an inductor and the cathode of the first thyristor, and the other end ofthe recovery valve is connected to the negative electrode of the DC power supply; one end of an H-bridge circuit in an output loop is connected to the other end of the inductor, the other end of the H-bridge circuit is connected to the negative electrode of the DC power supply, the H-bridge circuit comprises a first sub-module comprising a first capacitor and a first switch assembly and a second sub-module comprising a second capacitor and a second switch assembly, and the capacitance of the first capacitor is different from that of the second capacitor; a load loop comprises a to-be-tested valve test object, which is connected to two ends of the H-bridge circuit. By implementing the invention, a test platform which can be periodically operated and of which the turn-on voltage is differentfrom the turn-off voltage is built, and the on-off characteristics of the valve and the electrical performance of internal parts can be tested in a targeted manner.

Description

technical field [0001] The invention relates to the field of operation tests of ultra-high voltage converter valves, in particular to a test circuit and method for testing the on-off characteristics of converter valves. Background technique [0002] The core device of modern high-power power electronic devices is the single and bi-directional UHV converter valve. The UHV converter valve uses the switching characteristics of the internal thyristor to complete its function as a "high voltage switch", becoming the most widely used power electronic device. device. The technical indicators and technical level of the UHV converter valve determine the technical indicators and level of the DC project to a large extent, so it is necessary to conduct electrical performance tests on the UHV converter valve. [0003] In order to verify the operating performance of the UHV converter valve, it is necessary to simulate the voltage waveform in the actual engineering, and to test the openin...

Claims

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Application Information

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IPC IPC(8): G01R31/327
CPCG01R31/3272
Inventor 高冲杨俊李婷婷周建辉盛财旺张静
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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