Reliability computation method of extra-high voltage direct-current power transmission converter valve set system
An ultra-high voltage direct current and calculation method technology is applied in the field of reliability calculation of UHV direct current transmission converter valve group system, and achieves the effects of high calculation accuracy, fast calculation speed and strong model versatility
Active Publication Date: 2015-04-15
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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However, the above-mentioned documents only focus on the converter valve, and the research on the reliability of the converter valve group system has become a blank in the existing technology
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[0036] In the method for calculating the reliability of the converter valve group system in the UHV DC transmission system of the present invention, in view of the fact that the internal structure of the converter valve group is relatively fixed, combined with the characteristics of the fault tree method, the reliability model of the converter valve group is first established by using the fault tree method, and then The reliability model of the converter valve group system is established by state enumeration method. The specific method steps are as follows:
[0037] 1) Reliability calculation of converter valve group
[0038] 1.1) Analyze the impact of the failure of each component that constitutes the converter valve group on the converter valve group;
[0039] This method takes the four main components of the converter valve group, the converter valve, the grounding switch, the arrester, and the cooling and protection system, as the components that affect the overall failur...
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The invention provides a reliability computation method of an extra-high voltage direct-current power transmission converter valve set system. The method includes the following steps: (1) reliability computation of a single converter valve set, and (2) reliability computation of a converter valve set system. Reliability computation of the single converter valve set is firstly carried out, and comprises analysis of influences of component faults of the converter valve set system on the converter valve set, building of a fault tree of the converter valve set on the basis of the influences of the component faults on the converter valve set, analysis of the fault tree, and the reliability computation of the converter valve set; then the reliability computation of the converter valve set system is carried out, and includes enumerating fault events of the converter valve set on the single side, computing probability and frequency of the enumerated fault events and judging whether the enumerated fault events are finished, if the enumerated fault events are not finished, enumeration of the fault events is repeated again, or the reliability of the whole converter valve set system is computed, and computation results are output. The reliability computation method is strong in generality, convenient to popularize and apply, high in computation accuracy, high in computation speed, and capable of being widely used in the reliability computation of a double 12-pulse high-voltage direct-current valve set system.
Description
technical field [0001] The invention relates to a method for calculating the reliability of a UHV DC transmission converter valve group system, in particular to a method for calculating the reliability of an UHV DC power transmission converter valve group system with double 12-pulse connections, and belongs to the UHV DC transmission converter valve group system Innovative techniques for reliability calculation methods. Background technique [0002] With the growth of the national economy, China's demand for electricity continues to increase. China's natural conditions and the distribution characteristics of energy and load centers make ultra-long-distance, ultra-large-capacity power transmission inevitable. In order to reduce the loss of transmission lines and save precious land resources, UHV DC transmission is required. Since the UHV DC transmission technology is mainly used in special occasions such as long-distance high-power transmission, regional networking, asynchro...
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IPC IPC(8): H02J3/36G06F19/00
CPCY02E60/60
Inventor 黄莹谢开贵邱伟胡博黎小林张晓李凌飞郭旭阳
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD