Method for designing tap positions of deicing transformer of direct current deicing device based on graphical method

Abstract

The invention discloses a method for designing tap positions of a deicing transformer of a direct current deicing device based on a graphical method. The method comprises the following steps: 1) determining voltage required for deicing of each circuit of a transformer substation; 2) drawing a two-dimensional planar graph of the voltages required for deicing of the circuits; 3) extracting an intersection section of the voltages required for deicing of the circuits; and 4) determining a tap position of a secondary side of the deicing transformer according to the intersection section of the voltages required for deicing of the circuits. The method disclosed by the invention can simplify a design process of the tap positions of the deicing transformer, quantity of the tap positions is reduced to the utmost extent, and design and manufacturing costs of the deicing transformer are reduced; and the method disclosed by the invention has the advantages of simple design process, good design results, strong portability, low quantity of designed tap positions, rapidness in implementation and convenience in application.

Description

technical field [0001] The invention relates to the technical field of electrical engineering, in particular to a method for designing gear positions of an ice-melting transformer of a DC ice-melting device based on a graphical method. Background technique [0002] Ice and snow disasters occur frequently in southern China. Ice-covered power transmission lines are likely to cause disconnection and downturning, which seriously threatens the safe and stable operation of the power grid and the reliability of power supply. Especially in the catastrophic ice disaster in 2008, the freezing weather continued to hit East China, Central China and other regions of China, resulting in large-scale and long-term power outages in Hunan, Zhejiang, Jiangxi and other provinces, causing huge losses to the national economy and the production and life of the people. . For this reason, many domestic units have developed various types of ice-melting devices. Among them, the DC ice-melting device ...

AI Technical Summary

Problems solved by technology

More importantly, the selection of each gear corresponding to the secondary side voltage lacks overall planning, that is, generally only the needs of a certain line are considered without considering the needs of multiple lines, which often leads to the design of a large number of transformer gears and a lack of Adaptability to changes in line parameters, the design results are difficult to achieve optimal

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