Method for analyzing performance of saturation reactor for converter valve under the condition of switching on thyristor

An analysis method and thyristor technology, which are applied in the manufacture of inductors, fixed inductors, inductors/transformers/magnets, etc., can solve the problems of incomplete performance analysis of saturable reactors and non-consideration of iron loss resistance in saturable reactors. Achieve the effect of clear turn-on current model, clear turn-on circuit model, and clear analysis steps

Active Publication Date: 2010-12-22
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

However, the influence on the turn-on current of the thyristor is not combined with the tolerance of the thyristor. At the same time, the nonlinearity of the iron loss resistance is not considered in the model of the saturable reactor, and even the nonlinearity of the inductor is simply regarded as linear attenuation.
The above-mentioned deficiencies make the performance analysis of the saturable reactor under the opening of the thyristor incomplete

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  • Method for analyzing performance of saturation reactor for converter valve under the condition of switching on thyristor
  • Method for analyzing performance of saturation reactor for converter valve under the condition of switching on thyristor
  • Method for analyzing performance of saturation reactor for converter valve under the condition of switching on thyristor

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Embodiment Construction

[0045] The present invention uses the following steps to analyze the performance of the saturable reactor when the thyristor is turned on:

[0046] (1) Set the electrical model of the saturable reactor;

[0047] The electrical performance design goal of the saturable reactor is to determine the electrical parameters of the saturable reactor, including considering the electrical characteristics of the saturable reactor, and respectively determining the five parameter requirements of the saturable reactor: coil resistance, air-core inductance, core inductance, iron loss resistance and Capacitance between terminals, consider the non-linearity of the iron core inductance and iron loss resistance of the saturable reactor; in the case of low iron core excitation current, the iron core inductance and iron loss resistance are constant values, as the iron core excitation current increases, the iron core inductance and iron loss resistance tend to attenuate due to the working state of t...

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Abstract

The invention discloses a method for analyzing the performance of a saturation reactor for a converter valve under the condition of switching on a thyristor. Based on the current enduring capability of the thyristor under the condition of switching on the thyristor, the effects of different combinations of parameters of the saturation reactor on an applied electric power stress under the condition of switching on the thyristor are analyzed. The current enduring capability serving as a threshold value of the thyristor in each time segment in a switch-on period is analyzed emphatically to obtain an equivalent model of the saturation reactor and the thyristor in different time segments, and a current component of the thyristor is analyzed in different time segments to obtain the parameters of the saturation reactor required by protecting normal switch-on under the condition of switching on the thyristor. The analysis method lays theoretical and simulation foundations for the determination of the design optimization of the electric performance and electric parameter of the saturation reactor.

Description

technical field [0001] The invention relates to the field of power system devices, in particular to a performance analysis method of a saturated reactor for a converter valve when a thyristor is turned on. Background technique [0002] The saturable reactor for DC power transmission converter valve is one of the important components to protect the thyristor in the converter valve. It consists of an iron core and a winding, and uses the saturation characteristics of the iron core material to obtain the saturation characteristics of the electrical parameters. When the thyristor is turned on, the most important task of the saturable reactor is to protect the thyristor. [0003] For the research work in this area, some literatures have analyzed the influence of the saturable reactor on the turn-on current of the thyristor under non-periodic triggering conditions, but for the saturable reactor, only its nonlinear inductance characteristics are considered, and the non-linear The...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50H01F17/00H01F41/00
Inventor 汤广福于海玉刘杰
Owner CHINA ELECTRIC POWER RES INST
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