DC converter valve minimum turn-off angle running test method

A DC converter valve and operation test technology, which is applied in the direction of circuit breaker testing, measuring devices, instruments, etc., can solve the problems of inapplicability of devices and methods, and achieve a wide range of test products, flexible adjustment, and high equivalence Effect

Active Publication Date: 2010-07-14
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for the operation tests of high voltage parameters such as the maximum continuous operation load test and the maximum transient operation test, the device and method described in this patent application cannot be applied

Method used

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  • DC converter valve minimum turn-off angle running test method
  • DC converter valve minimum turn-off angle running test method
  • DC converter valve minimum turn-off angle running test method

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Embodiment Construction

[0025] The following is a preferred embodiment of the present invention, and the technical solutions realized by the present invention will be further described below in conjunction with the accompanying drawings.

[0026] The principle block diagram of the low-voltage parameter test device for the DC converter valve is shown in figure 1 . It mainly includes 6 pulsation back-to-back low-voltage high-current sources, high-voltage low-current loop, auxiliary valve V1 and test valve VT.

[0027] The high-voltage and small current source provides the forward trigger voltage required by the sample and the reverse recovery voltage after the sample is turned off, as well as the voltage jump and the forward voltage rise rate during the blocking period of the sample valve, which can accurately evaluate the valve selection of the sample. The correctness of circuit design can be achieved, and at the same time, the current change rate before the test valve is turned off is adjusted by ad...

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Abstract

The invention provides a DC converter valve minimum turn-off angle running test method, belonging to the fields of power electronics and electrical power system simulated experiment. The method realizes the needed turn-off time by flexibly adjusting the charging moment of a capacitance C in a high-voltage low current source, and simultaneously acquires the needed minimum turn-off voltage by being matched with the partial voltage of an auxiliary valve; and the method also can meet the sample taking energy by increasing primary oscillating process, and can fully test and verify the turn-off reliability of the valve. DC heavy current is provided by a six-pulse rectifier bridge, and the wave form is basically the same as that of the actual working condition.

Description

technical field [0001] The invention relates to the field of power electronics and power system simulation experiments, in particular to a test method for a DC converter valve, in particular to a test method for the minimum cut-off angle operation of a DC converter valve. Background technique [0002] Compared with AC transmission, DC transmission has incomparable advantages in long-distance large-capacity transmission, asynchronous networking, and submarine cable power transmission. As the core and key equipment of DC transmission, DC converter valves ensure its safe, reliable and stable operation. , not only the requirements of the system for the device, but also the requirement of the device to protect itself. The operation test is an important means to test the performance of the valve. At present, due to the increase of the voltage and current capability of a single thyristor, the operation test of the DC converter valve using the synthetic test method has been recogni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R31/327
Inventor 汤广福高冲温家良查鲲鹏
Owner CHINA ELECTRIC POWER RES INST
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