Markov state space diagram method for evaluating reliability of converter transformer system

Abstract

The invention provides a Markov state space diagram method for evaluating the reliability of a converter transformer subsystem, which comprises the following steps: analyzing the structure, the operation characteristics, the state and the state interline transfer rate of the converter transformer subsystem, and setting up a Markov state space diagram of the converter transformer subsystem; utilizing a computer to solve the Markov state space diagram through a program; and obtaining and outputting the reliability index of the converter transformer subsystem. The method can fully analyze the structure and the operation characteristics of the converter transformer subsystem, which comprise two fault modes of a converter transformer, the wiring mode of the converter transformer subsystem, a component group operation stopping model and a converter transformer station single-side whole standby mode as well as the fault, the repair and the random transfer process of standby switching installation of the converter transformer subsystem; and by calculating the expected transfer number of borders traversing and surrounding the boundaries of merger states, merger state frequency indexes can be obtained, and the influence of the transfer frequency among the merger states to the frequency indexes can be eliminated, so that remarkable superiority exists during calculating the frequency indexes, and the calculating result is more accurate. The method is suitable for evaluating the reliability of the converter transformer subsystem in a high-voltage direct-current transmission system of single-twelve-pulse and double-twelve-pulse wiring.

Description

technical field [0001] The invention relates to a reliability evaluation method of a high-voltage direct current transmission system, that is, a reliability index evaluation method of a high-voltage direct current transmission system, and specifically relates to a reliability evaluation method of a converter transformer subsystem. It belongs to the technical field of electrical engineering. Background technique [0002] my country has a vast territory, and the economic development and resource distribution are extremely uneven. About two-thirds of the hydropower resources that can be developed are distributed in the southwest region, and two-thirds of the coal resources are distributed in Shaanxi, Shanxi, Inner Mongolia and other places, while electricity consumption is mainly concentrated in In the central, eastern and southern regions, the contradiction between primary energy distribution and power consumption determines that my country will build some large-capacity, long-...

AI Technical Summary

Problems solved by technology

[0008] Aiming at the deficiencies existing in the reliability evaluation method of the existing converter system, the technical problem solved by the present invention is that the existing technical means are not reasonable enough, the accuracy is not high, there is a significant gap with the actual operation, and there are hidden dangers in reliability and safety defects, providing a Markov state space diagram method for the reliability assessment of converter rheological systems

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