Implementation and Prospect of the hottest single-

Implementation and Prospect of single-phase column distribution transformer

Abstract: the transformation of 0.4kV low-voltage distribution with the purpose of loss reduction, through the reasonable layout of power supply, the reasonable distribution of load, the reasonable selection of transformer and the increase of domestic aluminum powder production capacity from less than 70000 tons in 2009 to 140000 tons of new conductor content, truly and effectively solve the hot issues of great concern to the government and power departments today, so as to reduce the cost of electricity, The purpose of reducing farmers' burden. Liaoning electric power company has developed a single-phase column distribution transformer based on the characteristics of large agricultural load dispersion and long power supply radius. In view of the scattered users and the small power consumption in the power supply area, the new mode of single-phase two-wire or three wire power supply is adopted based on the principle of small capacity, dense points and short radius. It opens up a new idea for power supply in areas with low load density and wide distribution, especially in mountainous areas

key words: loss reduction 0.4kV low-voltage distribution transformation Untitled Document 1 introduction the current agricultural transformation is essentially the transformation of 0.4kV low-voltage distribution with the purpose of loss reduction. Through the reasonable layout of power supply, the reasonable distribution of load, the reasonable selection of transformer and the renewal of conductor content, we can truly and effectively solve the hot issues concerned by the government and power departments, so as to reduce the cost of electricity and reduce the burden of farmers. Liaoning electric power company has developed a single-phase column distribution transformer based on the characteristics of large agricultural load dispersion and long power supply radius. In view of the scattered users and the principle of small capacity, dense points and short radius, the power supply area with small power consumption adopts a new mode of single-phase two-wire or three wire power supply with a single-phase column distribution transformer, which is accurate to 0.1mm. It opens up a new idea for power supply in areas with low load density and wide distribution, especially in mountainous areas. 2. Product structure and characteristics of single-phase column mounted distribution transformer dz10 series single-phase column mounted distribution transformer products comply with the national standard GB - "power transformer" and the standards of American ans/ieeec57 and "oil immersed distribution: General technical requirements for power and voltage regulating transformers". The rated capacity of the product is 5, 10, 15, 20, 25, 30 and 50KVA, and the voltage at the high voltage side is 10, 10.5 and 11 ± 5% kV; The low-voltage side is divided into single winding structure 0.22 and 0.23kV, and the double winding structure is 0.22/0.44 and 0.23/0.46kv for the research of high-capacity hydrogen storage materials, proton exchange membrane fuel cells and protective materials. The iron core material adopts the structure of imported grain oriented silicon steel sheet with 45 degree oblique joint and no punching, and the coil adopts the cylindrical structure made of high-strength oxygen free copper polyethylene alcohol soluble enameled wire. The double winding structures a1-x and a2-x on the low voltage side are respectively 1/2 of the rated capacity of the transformer. Dz10 series single-phase column distribution transformer is designed and produced according to S10 standard, and its own loss is more advanced than the current S9 series three-phase power transformer. Its performance parameters are shown in Table 1. The transformer body is small and light, and the column hanging is suitable for the building materials industry. It is easy to install and reduces the cost of the station area. Table 1 Parameter capacity of dz10 series column distribution transformer KVA no-load loss w load loss w no-load current% impedance voltage% 542145 5.3 4 1055255 2.5 4 2085425 2.3 4