Distribution transformer capacity sequence grade optimizing method

Abstract

The invention provides a distribution transformer capacity sequence grade optimizing method, belonging to the power system distribution transformer field. Firstly grouping calculation is started at minimum capacity grade sequence according to rated capacity specified by related existing standards, the calculation is stopped until an obvious inflection point appears on transformer average comprehensive damage curve, the capacity grade at the inflection point is the optimal capacity grade with minimum average comprehensive damage of the capacity grade sequence group, then capacity grade sequence grouping is continued by taking the next capacity grade as an initial point, optimizing calculation is carried out sequentially according to the steps until the inflection point appears, and the optimal capacity grade with minimum average comprehensive damage of the group is selected. The process is repeated, and finally optimized new capacity grade sequence is formed. Initial investment cost of distribution transformer can be effectively reduced, thus being beneficial to storage and dispatching of emergency goods and materials and running goods and materials of power system, and operating cost is reduced and the overall size advantage is developed, thus being beneficial to standardization and normalization of major equipment of distribution power system.

Description

technical field [0001] The invention relates to a method for optimizing a distribution transformer capacity sequence level, which belongs to the field of power system distribution transformers. Background technique [0002] During the large-scale transformation of urban and rural power grids from 1998 to 2000, a large number of S9 distribution transformers were used in my country, accounting for about 50% to 60% of the distribution transformers in service in the system. In recent years, through the adoption of new technologies, new materials, new structures, and new processes, the performance level of domestic new energy-saving distribution transformers has been continuously improved, and S11 distribution transformers have become mainstream products in new construction and renovation projects. The purchase price of distribution transformers fluctuates up and down due to the purchase scale. The larger the purchase quantity of products with the same capacity and specifications...

AI Technical Summary

Problems solved by technology

There are many levels of distribution transformer capacity sequence, which is not conducive to the storage and dispatch of power grid emergency materials and operating materials, is not conducive to reducing power grid operating costs and giving full play to the overall scale advantages, and is also not conducive to the standardization and normalization of main equipment in the distribution network

Images