Application of Single-Phase Transformer in Power Supply System

Single-phase distribution transformers are small in size and light in weight. They can penetrate into the load center to the maximum extent, shorten the radius of the low-voltage network and reduce losses. This type of transformer can be installed on a pole, which is easy to install and can reduce material costs in the Taiwan area.

Single-phase distribution transformers generally adopt a single-pole suspension installation method. The poles should be 12-meter heavy-duty cement poles or 15-meter cement poles. The installation location of single-phase distribution transformers is less restricted by geographical factors, but more restricted by load characteristics. Generally, single-phase distribution transformers can be used in the following four situations:

First, when the power supply radius of the three-phase distribution transformer is too large, the load density is small, and the end supply voltage is low, affecting the normal use of electricity by users, installing a single-phase distribution transformer at the end of the power supply can shorten the low-voltage power supply radius and solve the problem of user voltage Low problem.

Second, when the load of the three-phase distribution transformer is too heavy, according to the load characteristics, select the appropriate branch line to install the single-phase distribution transformer, which can transfer the load and solve the problem of capacity expansion.

Third, installing single-phase distribution transformers in residential areas without three-phase power users to provide power to residents can shorten the low-voltage power supply radius and reduce losses.

Fourth, installing single-phase distribution transformers for power supply in locations with low load density, wide distribution, and no three-phase power users can save investment and solve the problem of being far away from power points.

According to the distribution transformer installation requirements and the actual operation conditions of Suqian power grid, the typical configuration of single-phase distribution transformer installation should include single-phase distribution transformer, low-voltage switch, reactive power compensation device, distribution load monitoring system and other equipment.

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