Optimum Selection Method of Distribution Transformer

Abstract

The invention discloses a method for optimizing the type selection of distribution transformers, which collects the models and related parameters of distribution transformers that can be selected in the station area, and based on the load data of the previous year in the station area, based on the load of the nth year in the forecast planning period, Set the width of the load interval, arrange the load intervals from small to large according to the load value, obtain the load distribution curve, count the load interval under the maximum probability coefficient, calculate the upper limit and lower limit of the economical operation area of ​​the transformer, and obtain the economical operation area of ​​the transformer , calculate the selection range of transformer economic capacity, establish a distribution transformer life-cycle cost model considering the risk cost, calculate the life-cycle cost of each distribution transformer in the sequence, and select the transformer model with the smallest total cost as the optimal transformer. The present invention effectively provides a method with high utilization efficiency, low operating cost and can ensure more optimal operation of the transformer by considering the maximum probability distribution coefficient and risk cost in the load interval.

Description

technical field [0001] The invention relates to the technical field of power system operation, in particular to a distribution transformer optimization selection method. Background technique [0002] As the main equipment to ensure the stable operation of the power system, distribution transformers play an important role in distributing electric energy to power users. Therefore, in order to promote the construction of "three types and two networks" and reduce the operating cost and loss of distribution transformers, a large number of traditional high Energy-consuming distribution transformers will need to be replaced. [0003] At present, the capacity selection method of most transformers is based on multiplying the peak load with a small frequency in a year by a certain fixed ratio of the economic operation range. This method only considers the safety of transformer operation, and does not take into account the The overall utilization rate and economic benefits of operatio...

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Problems solved by technology

[0003] At present, the capacity selection method of most transformers is based on multiplying the peak load with a small frequency in a year by a certain fixed ratio of the economic operation range. This method only considers the safety of transformer operation, and does not take into account the The overall utilization rate and economic benefits of operation make the transformer in the light-load operation state for a long time, resulting in large transformer loss, thus resulting in low utilization efficiency and high operating costs

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