Current source for function test of DC high-voltage transmission thyristor converter valve component

A technology for thyristor converter valves and high-voltage direct current transmission, which is applied to components of electrical measuring instruments, measuring electricity, and measuring electrical variables, etc., and can solve problems such as high capacity requirements, complex structures, and high voltage on the valve side of current source converter transformers. , to achieve the effect of reducing the capacity and reducing the secondary side voltage

Inactive Publication Date: 2013-10-02
CHINA XD ELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

At present, the current source used in the test generally uses the back-to-back direct test method, the valve side voltage of the current source converter transformer is high, and

Method used

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  • Current source for function test of DC high-voltage transmission thyristor converter valve component

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Embodiment Construction

[0028] The current source for the functional test of the HVDC thyristor converter valve assembly of the present invention will be described in detail below in conjunction with the accompanying drawings:

[0029] The current source in the function test circuit of the high-voltage direct current transmission thyristor converter valve assembly of the present invention is mainly composed of a three-phase three-winding rectifier transformer, a 6-pulse rectifier bridge, a smoothing reactor, a DC bus, an AC switch and necessary measurement, control and protection equipment composition. Its working principle: the rectifier transformer transforms the high voltage and low current of the primary side power supply system side into the low voltage and high current of the secondary valve side, transforms it into a high DC current through a 6-pulse rectifier bridge, and commutates the test product through the DC bus The valve assembly supplies the test current. The smoothing reactor plays t...

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Abstract

The invention discloses a current source for a function test of a DC high-voltage transmission thyristor converter valve component. The current source mainly comprises a three-phase three-winding rectifier transformer T1 and a six-pulse rectifier bridge, wherein the three-phase three-winding rectifier transformer T1 transforms the high voltage and low current of a power supply system to the low voltage and large current on a valve side; the six-pulse rectifier bridge transforms the AC to large DC and provides the test current for a converter valve component sample through a DC bus; the six-pulse rectifier bridge is only one set, and the DC output current of the six-pulse rectifier bridge can reach 7,000 A. The current source can test more samples at lower voltage on the valve side of the transformer and can greatly reduce the secondary side voltage of a converter transformer under the condition that the test requirements are met so as to greatly reduce the capacity of the rectifier transformer in the current source loop.

Description

technical field [0001] The invention relates to the electrical test field of high-voltage direct current transmission thyristor converter valve components, in particular to a current source for functional testing of high-voltage direct current transmission thyristor converter valve components. Background technique [0002] The high-power thyristor converter valve is one of the core equipment of the converter station of the HVDC power transmission project. Its cost generally accounts for about 20% of the total investment of the converter station equipment of the HVDC power transmission project, and its quality directly affects the reliability of the HVDC power transmission system. . As the construction scale of high-voltage or ultra-high voltage direct current transmission projects continues to increase and the transmission capacity continues to increase, it is necessary to continuously develop thyristor converter valves with higher voltage and current levels to meet the need...

Claims

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Application Information

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IPC IPC(8): G01R1/28
Inventor 张万荣苟锐锋行鹏王浩
Owner CHINA XD ELECTRIC CO LTD
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