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Device and method for testing parameters of thyristor stage damping loop of converter valve

A thyristor-level, parameter testing technology, applied in measuring devices, capacitance measurement, measuring electrical variables, etc., can solve problems such as unsafe testing equipment and inaccurate parameter measurement of damping loops

Active Publication Date: 2020-07-07
XJ ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a thyristor-level damping circuit parameter testing device and method for converter valves, which are used to solve the problems of inaccurate measurement of damping circuit parameters and unsafe testing equipment in the prior art

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  • Device and method for testing parameters of thyristor stage damping loop of converter valve
  • Device and method for testing parameters of thyristor stage damping loop of converter valve
  • Device and method for testing parameters of thyristor stage damping loop of converter valve

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Embodiment Construction

[0035] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0036] A damping loop parameter testing device of the present invention is as figure 2 As shown, it includes the control system, measurement system, and power supply circuit for powering the thyristor stage. Among them, the control system is connected to the measurement system, and the power supply circuit is provided with an AC power supply, a sampling resistor R L , an isolation transformer and a relay, one end of the isolation transformer is connected to the AC power supply through the relay, and the other end is connected to the sampling resistor; the measurement system is set to measure the sampling resistor R L Interface C of the negative peak of the voltage across the 2 , interface C for measuring the negative-going peak value of the AC mains voltage 1 . The thyristor stage includes a thyristor VT, and a damping circuit composed ...

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Abstract

The invention relates to a converter valve thyristor level damping loop parameter test device and method. The device comprises a control system, a measurement system and a power supply loop. The interface is arranged in the measurement system to acquire the negative peak value of the voltage of the two ends of the sampling resistor and the negative peak value of the AC power voltage, and the damping loop parameter is calculated according to the acquired values with combination of the conduction voltage drop of the thyristor trigger control panel energy taking circuit reverse diode so that theaccuracy and the reliability of the damping resistance and capacitance value test can be guaranteed, and the device structure is simple, the price is low and operation is safe and convenient.

Description

technical field [0001] The invention belongs to the technical field of high-voltage direct current transmission, and in particular relates to a device and method for testing parameters of a thyristor-level damping circuit of a converter valve. Background technique [0002] The converter valve is an important component in the HVDC transmission project. Due to the high voltage level of the HVDC transmission, the converter valve is usually composed of multi-stage thyristors connected in series. The function of the damping circuit is to ensure the uniform voltage distribution between the series thyristors, which is composed of damping resistance and damping capacitance, which is of great significance to the safe operation of DC transmission. Therefore, accurate testing of damping circuit component parameters is extremely important. However, since there are thousands of thyristor stages in a single converter station, it is a huge task to measure the parameters of the damping cir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/26G01R27/08
CPCG01R27/08G01R27/2605
Inventor 范彩云王宇丁韩坤刘堃张志刚黄永瑞
Owner XJ ELECTRIC