A distribution transformer optimization method for distribution network under electric energy substitution

Abstract

The invention discloses a power distribution transformer optimization method for a power distribution network under electric energy replacement. The method comprises the steps of computing a yearly continuous apparent power curve of the first year in electric energy replacement; determining a distribution transformer planning capacity of each distribution transformer, and determining a capacity upgrade set; computing three feature indexes; computing a criterion for determining that the general distribution transformer can be replaced with an on-load capacity adjustment distribution transformer, and determining a replaceable point set; computing the yearly continuous apparent power curve of each of n years in electric energy replacement, and building a distribution transformer replacement optimization model through combining with constraints; and acquiring an optimization scheme for distribution transformer under electric energy replacement according to the distribution transformer replacement optimization model, the capacity upgrade set and the distribution transformer planning capacity. According to the method provided by the invention, the distribution transformer planning schemecan be comprehensively made from two aspects of energy conservation and consumption reduction and replacement cost at the same time, the computing amount of the distribution transformer planning is reduced, and a theoretical basis is provided for urban power distribution network distribution transformer planning and distribution transformer upgrading and reconstruction under electric energy replacement.

Description

technical field [0001] The invention relates to the technical field of electric energy substitution distribution network, in particular to a distribution transformer optimization method for electric energy substitution distribution network. Background technique [0002] In order to reduce urban smog pollution and implement a sustainable development strategy, the national energy department has issued a series of documents on electric energy substitution to promote the gradual replacement of polluting energy by green energy and reduce the emission of pollutants. Under this call, the replacement of electric energy in urban distribution networks has gradually emerged, including heating with electricity, coal with electricity, oil with electricity, and gas with electricity, etc., resulting in significant changes in the electricity load in the distribution network. Under the background of electric energy substitution, the peak-to-valley difference of the power supply load of the d...

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Problems solved by technology

[0004] Aiming at the deficiencies of the above-mentioned prior art, the present invention provides a method for optimizing distribution transformers of distribution networks under electric energy substitution, which solves the technical problem in the prior art that lacks comprehensive consideration of distribution transformer planning schemes, and can comprehensively consider electric energy under substitution. Change characteristics of electric loads, active power loss characteristics of distribution transformers, operating characteristics of on-load capacity regulation and distribution transformers, and cost-effectiveness of on-load capacity regulation and distribution transformer replacements to formulate distribution transformer planning schemes

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