An analytical study of the working principle of three-phase power transformers

Iron core material using imported grain orientated silicon steel sheet 45 degrees diagonal seams without punching the structure, the coil uses a high-strength oxygen-free copper polyethylene alcohol soluble enamelled wire winding and into a cylindrical structure. Low-voltage side double winding structure and respectively for the transformer rated series of single-phase column distribution transformer is according to the S standard design and production, from the transformer itself loss than the current operation of the S series of three-phase power transformer more advanced, its transformer body is small and light, column hanging type, easy to install at the same time to reduce the cost of the station.

Column distribution transformer parameters capacity no-load loss load loss no-load current impedance voltage, implementation examples fushun city qingyuan county is located in the north of liaozhou, due to the power supply radius is far beyond the allowable power supply radius, voltage loss is serious, power loss is big, especially the peak stage voltage loss rate of up to 30 or so, the tail end of the user fluorescent lamps can't be started, no image of the TV, etc., seriously affecting the quality of electricity of the residential users. Power loss rate of up to 40, resulting in high electricity prices, heavy burden on farmers, seriously dampening the enthusiasm of farmers to use electricity.

Through the power supply area analysis shows that the transformer is always in light load operation state, the maximum load when the load ratio is less than 40, using single-phase three-wire system to both sides of the power supply, the load is evenly distributed. Comparison of monthly power loss before and after transformation. Transformer monthly loss of power consumption line monthly loss of power consumption after the transformation of network loss reduction rate before transformation after the transformation, comprehensive benefit analysis: in the same capacity under no-load loss decreased significantly.

Adopting single-phase transformer for power supply, high-voltage line can be set up according to two lines, low-voltage line can be set up according to two or three lines, while adopting three-phase distribution transformer for power supply, high-voltage line must be set up according to three lines, and low-voltage line is set up according to four lines.