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High-voltage direct-current power transmission commutation transient low-voltage test method and circuit thereof

A high-voltage direct current transmission and test method technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of low test efficiency and unreliable test process, and achieve reliable test process, high test efficiency, and simple implementation Effect

Active Publication Date: 2013-10-16
XJ ELECTRIC
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a high voltage direct current transmission commutation transient low voltage test method and its circuit to solve the problems of unreliable test process and low test efficiency of the existing high voltage direct current transmission commutation transient low voltage test method

Method used

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  • High-voltage direct-current power transmission commutation transient low-voltage test method and circuit thereof
  • High-voltage direct-current power transmission commutation transient low-voltage test method and circuit thereof
  • High-voltage direct-current power transmission commutation transient low-voltage test method and circuit thereof

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] Circuit embodiment of the present invention:

[0027] Such as figure 2 As shown, the circuit of the transient low voltage test method of the HVDC converter valve of the present invention mainly includes a high-voltage voltage source, a low-voltage current source, a shock capacitor Cs, a first auxiliary control valve Da4, a second auxiliary control valve Da3, a third auxiliary control valve Auxiliary control valve Da5, high pressure isolation valve Daux, commutation reactor Lc, reactor Ls and sample valve Vt.

[0028] The two ends of the high-voltage voltage source are connected in parallel with the third auxiliary control valve Da5 and the shock capacitor Cs. The reactor Ls is connected in series between Da5 and Cs through the positive pole of the high-voltage voltage source. The first auxiliary control valve Da4 and the second auxiliary control valv...

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Abstract

The present invention relates to a high-voltage direct-current power transmission commutation transient low-voltage test method and a circuit thereof. The circuit comprises a high-voltage voltage source, a low-voltage current source and auxiliary control valves Da5, Da4 and Da3. In the test method, according to the triggering timing of the auxiliary control valves Da5, Da4 and Da3, a high backward recovery voltage and a low forward triggering voltage can be applied over a test valve Vt when a forward voltage is established on the test valve Vt, such that voltage stress characteristics in a direct-current power transmission commutation transient operation process can be truly reflected, and the test requirements can be satisfied by controlling the triggering of the auxiliary control valves by a control system, requiring no additional auxiliary equipment in the test circuit and eliminating the need to consider the heat radiation of resistors. The method and circuit provided by the invention are simple to implement, and can increase the test efficiency.

Description

technical field [0001] The invention relates to a high voltage direct current transmission commutation transient low voltage test method and a circuit thereof. Background technique [0002] High-voltage direct current transmission is a new type of power transmission developed in the 1950s. At present, there are about 100 direct current transmission projects in the world, and nearly 20 direct current transmission projects have been built or are under construction in my country, including ±800kV UHV direct current Power transmission project. The continuous progress of DC transmission technology and its superiority in the development of large power grids have made my country's power grids face an unprecedented development situation. Since DC transmission has the characteristics of long transmission distance, large transmission capacity, and flexible control, etc., the DC transmission projects in operation, construction and planning have already undertaken and are about to under...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 姚为正张建常忠廷徐翀何青连李娟才利存胡永雄段艳丽
Owner XJ ELECTRIC
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