Method for calculating reliability of high-voltage direct-current power transmission system based on universal generation function

Abstract

The invention discloses a method for calculating reliability of a high-voltage direct-current power transmission system based on a universal generation function, comprising the following steps: assuming that elements in the high-voltage direct-current power transmission system are functionally independent of one another, and subjecting a structure diagram of the high-voltage direct-current power transmission system to equivalent transformation; subjecting the high-voltage direct-current power transmission system subjected to equivalent transformation to serial-parallel structural decomposition so as to obtain subsystems of the system; acquiring element reliability parameters in the high-voltage direct-current power transmission system, and calculating an element state-probability distribution function; subjecting the element state-probability distribution function to Z transformation to calculate an element U function; calculating the U function of each subsystem according to a functional function; calculating a state-probability distribution function of the high-voltage direct-current power transmission system according to an equivalent structure diagram of the high-voltage direct-current power transmission system. The invention provides state-probability distribution function calculation for HVDC (high-voltage direct-current) power transmission system in time domain, thus pre-judging real-time reliability and laying basis for the formulation of corresponding maintenance plans and optimization and decision.

Description

technical field [0001] The invention relates to the field of system reliability calculation, in particular to a method for calculating the reliability of a high-voltage direct current transmission system based on a general generating function. Background technique [0002] The reliability calculation of HVDC (High Voltage Direct Current, HVDC) transmission system operation behavior is the basis for the planning and operation control decision-making of the AC-DC hybrid power grid, and the relationship between the reliability of the HVDC transmission system and the reliability of the equipment that constitutes the HVDC transmission system is obtained. The explicit functional relationship is fundamental to determine its planning, control and decision-making. [0003] The structure of HVDC transmission system is complex, there are many equipments, and the operating state changes with the operating state of the sending and receiving end grid and the state of the HVDC transmission...

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Problems solved by technology

[0005] In order to solve the deficiencies in the prior art, the present invention discloses a method for calculating the reliability of HVDC power transmission system based on a general generating function, which is used to solve the problem of the method for calculating the reliability of HVDC power transmission system adapted to the maintenance plan and optimal decision-making

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