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Reliability analytical method of extra-high voltage direct-current transmission project thyristor converter valve system

A thyristor converter valve and UHV DC technology, which is applied in the field of reliability analysis based on the multi-level structure of UHV DC transmission thyristor converter valve system, can solve the problem of failure to fully consider the configuration level and functional scope of auxiliary systems, lack of commutation Reliability analysis of the internal structure of the valve and other issues, to achieve the effect of detailed reliability analysis, small impact and harm, and improved reliability

Active Publication Date: 2018-12-14
XI AN JIAOTONG UNIV +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In terms of the reliability evaluation of the converter valve, most scholars simply regard the auxiliary system of the converter valve as a whole, and do not fully consider the different configuration levels and functional scope of the auxiliary system in actual engineering.
In addition, in the evaluation of the converter valve, the single valve is mostly used as the basic unit of analysis, and the reliability analysis of the internal structure of the converter valve is lacking.

Method used

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  • Reliability analytical method of extra-high voltage direct-current transmission project thyristor converter valve system
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  • Reliability analytical method of extra-high voltage direct-current transmission project thyristor converter valve system

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Embodiment Construction

[0069] (1) Converter valve topology

[0070] The thyristor is the core component of the converter valve. It needs to be used together with other auxiliary devices to form the basic switching unit of the converter valve - the thyristor stage, including the thyristor and the damping circuit capacitor C d with resistor R d , DC equalizing resistor R dc And the thyristor control unit (Thyristor Control Unit, TCU), its topology such as figure 1 shown.

[0071] The valve assembly is a structural unit composed of several to dozens of thyristor stages in series and one or two saturable reactors in series. Functionally, it can be used as a complete single valve or a proportional unit of a single valve. ,like figure 2 shown.

[0072] The single valve is a bridge arm of the converter, also known as the valve arm, which is composed of several valve components connected in series. Due to the development of thyristor technology and the consideration of filter design, 12-pulse convert...

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Abstract

The invention discloses a reliability analytical method of an extra-high voltage direct-current transmission project thyristor converter valve system. The reliability analytical method comprises the steps that 1 reliability calculation of a single valve of the extra-high voltage direct-current transmission project thyristor converter valve system is carried out; 2 the reliability calculation of 12-pulse converter is carried out; 3 the reliability calculation of single-pole converter is carried out; and 4 the reliability calculation of double-pole converter is carried out, and an index capableof assessing the reliability of the extra-high voltage direct-current transmission project thyristor converter valve system is obtained. According to the reliability analytical method of the extra-high voltage direct-current transmission project thyristor converter valve system, a multilayered structure and a function range of a converter valve control system are taken into full consideration in the analysis process, and influences of each level on the operation and reliability of the converter valve are fully reflected.

Description

【Technical field】 [0001] The invention belongs to the field of reliability of ultra-high voltage direct current transmission engineering, in particular to a reliability analysis method based on a multi-level structure of an ultra-high voltage direct current transmission thyristor converter valve system. 【Background technique】 [0002] The reliability of UHV projects has a very important impact on the entire power system, and the improvement of its reliability will also bring huge benefits to the safety, reliability and economy of the power system. The thyristor converter valve system is the core equipment of UHVDC power transmission at present, and its reliability directly determines the safe and stable operation of the entire power transmission system. Therefore, the reliability of the converter valve system in the UHVDC power transmission project is evaluated and the influence of various factors is analyzed. It is of great significance to effectively improve the reliabilit...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R31/327
CPCG01R31/003G01R31/327
Inventor 卓放勾雅婷刘翠翠张志刚王丰高冲周建辉
Owner XI AN JIAOTONG UNIV
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