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Overhaul period optimization method for intelligent substation protection system

A technology for intelligent substations and protection systems, applied in system integration technology, information technology support systems, instruments, etc., can solve problems such as waste of maintenance resources

Active Publication Date: 2019-08-09
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] The purpose of the present invention is to address the deficiencies of the prior art and provide a method for optimizing the maintenance period of the protection system of the intelligent substation to solve the problem of waste of maintenance resources in the case of improving the reliability of the protection system

Method used

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  • Overhaul period optimization method for intelligent substation protection system
  • Overhaul period optimization method for intelligent substation protection system
  • Overhaul period optimization method for intelligent substation protection system

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Experimental program
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Embodiment

[0195] Based on the built model, the simulation is carried out on the MATLAB2014 software platform, and the corresponding simulation parameter settings are set. The simulation parameters are shown in Table 1:

[0196] Table 1 Simulation parameter table

[0197]

[0198] Since there is no uniform standard for the equipment purchase cost and maintenance cost of protection related equipment, this paper adopts the experience value of equipment purchase cost and breakdown maintenance (B type maintenance) cost provided by a certain manufacturer, and refers to relevant materials to classify C, D, A The cost of the class is set. General maintenance includes categories C and D. The type of maintenance in stable operation is category D, and the type of maintenance in the wear-out period is category C. The maintenance cost of category C is 1.5 times the maintenance cost of category D; the overhaul in stable operation and wear-out period is A The maintenance cost of category D is 2.5 ...

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Abstract

The invention discloses an overhaul period optimization method for an intelligent substation protection system, and the method comprises the steps: employing a Weibull distribution function and an improvement factor which represents the influence of planned maintenance on an equipment failure rate, and building an equipment failure rate model which considers the aging of equipment and incomplete planned maintenance; establishing a fault rate model of the intelligent substation line protection system by using the reliability block diagram; adopting different planned maintenance periods in the stable operation period and the loss period of the line protection system; constructing an annual average operation cost model of the intelligent substation line protection system, considering the sampling trip-out modes of the direct mining direct tripping mode, the direct mining network tripping mode, the network mining network tripping mode, the single line protection configuration, the double line protection configuration mode and the maintenance cost of different maintenance types, and solving to obtain the optimal planned maintenance period of each of the two stages when the annual average operation cost is minimum. The influence of equipment aging, maintenance type, protection configuration and sampling tripping mode is considered, and the maintenance cost can be effectively reducedwhile the reliability of the protection system is improved.

Description

technical field [0001] The invention belongs to the technical field of the reliability of an intelligent substation protection system, and in particular relates to a maintenance cycle optimization method for an intelligent substation protection system. Background technique [0002] Most of the existing reliability evaluation models of intelligent substation protection systems are based on the condition that the failure rate is fixed and the overhaul is complete overhaul. Phenomenon. Considering the overhaul as a complete overhaul will lead to too ideal reliability evaluation results. In view of the above problems, scholars at home and abroad have begun to study reliability assessment methods based on incomplete maintenance theory and considering equipment aging factors. However, when considering maintenance factors, different types of maintenance are not considered, and the setting of failure rate parameters is not rigorous enough. Therefore, the accuracy of the traditiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q10/00G06Q50/06
CPCG06Q10/04G06Q10/20G06Q50/06Y02E40/70Y04S10/50
Inventor 童晓阳郭升
Owner SOUTHWEST JIAOTONG UNIV
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