A Reliability Sensitivity Analysis Method and System for a Smart Substation Communication System

Abstract

The invention discloses a reliability sensitivity analysis method and system of an intelligent substation communication system, which is applied to an intelligent substation communication system. The method is carried out as follows: 1. Establish a reliability index system; 2. Establish an original parameter system; 3. 1. Establish the sensitivity system; 4. Obtain the state space model of the system; 5. Obtain the original parameters; 6. Obtain the reliability index; 7. Calculate the sensitivity; 8. Sensitivity analysis; 9. Give suggestions for improving reliability; 10 , Complete the sensitivity analysis, so as to realize the reliability sensitivity analysis method. The invention conducts sensitivity analysis on the communication system of the intelligent substation, which is beneficial to find out the weak link of the communication system of the intelligent substation, thereby being more conducive to improving the reliability of the communication system of the intelligent substation.

Description

technical field [0001] The invention relates to the technical field of reliability of smart substations, in particular to a reliability sensitivity analysis method and system for communication systems of smart substations. Background technique [0002] Through its communication system, the smart substation realizes the holographic data sharing of the whole station and between stations, realizes basic functions such as substation relay protection, fault recording, measurement, control, metering and monitoring, and supports real-time automatic control of the power grid, intelligent Advanced functions such as adjustment, online analysis and decision-making, cooperative interaction and advanced relay protection. [0003] The technical progress of smart substation is mainly reflected in the modernization of communication and information technology. The realization of any function (such as relay protection, control and metering, etc.) cannot be separated from communication; the co...

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Problems solved by technology

[0004] At present, the research technology on the reliability of smart substation communication system is mainly to express the logical relationship between components through the reliability block diagram, and to solve the availability and unavailability of the system by using methods such as fault tree, minimum path set or state space. The probability of availability and unavailability can only be used to obtain the possibility of each component and the system when it is in a normal working or fault state, but it cannot obtain the sensitivity of the component to the reliability of the system, and it cannot be obtained that each specific component affects the entire system. The impact trend and degree of reliability, so there is no effective pertinence when taking measures to improve system reliability

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