Reliability-based common standby distribution transformer optimal configuration method

Abstract

The invention provides a reliability-based common standby distribution transformer optimal configuration method. The method comprises steps of: taking a system distribution transformer set of an electric power system and a configured common standby distribution transformer as research objects; establishing a reliability Markov model for configuration of the common standby distribution transformer by the system distribution transformer set of the electric power system; based on the reliability Markov model, solving a reliability index for configuration of the common standby distribution transformer by the system distribution transformer set of the electric power system; by considering reliability and economical effects on the electric power system caused by load difference of different distribution transformers in the system distribution transformer set, establishing and solving an expense equation of a common standby distribution transformer optimal configuration model; and carrying out expense comparison by use of an enumeration analysis method, and preferentially determining a common standby distribution transformer optimal configuration scheme of the electric power system. Thus, economical performance of the configuration of the common standby distribution transformer is improved under the premise of ensuring the operation reliability of the electric power system, and comprehensive cost for construction of standby devices of the electric power system is reduced.

Description

technical field [0001] The invention belongs to the field of power system asset management, and relates to a power system backup equipment planning technology, in particular to a reliability-based public backup power distribution transformer optimization configuration method. Background technique [0002] In the power system, the distribution transformer is one of the key power distribution equipment. The distribution transformers in different positions constitute the system distribution transformer group of the power system, which directly faces the power users and is the link that causes the most faults and power outages. Once a fault occurs It will directly lead to power outages for users and the impact of power outages will be greater, and the fault repair time will be longer, which will easily cause serious economic losses. Therefore, in the operation and management of power distribution system, the impact of distribution transformer failure on users should be avoided o...

AI Technical Summary

Problems solved by technology

[0004] However, the number of common backup distribution transformer configurations will have an impact on the reliability and economy of the power system

If the number of public standby distribution transformers is too large, it will increase the configuration cost of distribution transformers, increase the construction cost of the power system, and cause unnecessary waste of resources; and if the number of public standby distribution transformers is not enough to cope with the system The distribution transformer faults in the distribution transformer group will reduce the distribution reliability of the power system, resulting in increased fault losses, and it is also necessary to consider the load importance and load size of different distribution transformers in the system distribution transformer group Difference

However, in the prior art, there are few related studies that fully consider the impact of the number of public standby distribution transformers and the load differences of different distribution transformers on the reliability and economy of power systems.

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