How to regulate the voltage of dry type transformer?

Voltage regulation principle of dry type transformer

The voltage regulation principle of  is mainly realized by changing the proportion of turns in the winding. In a dry transformer, the input voltage is passed through the iron core to the output winding. And because the number of turns of the two winding is different, the output voltage will change accordingly. By changing the number of turns of the output winding, the output voltage can be adjusted.

dry-type-transformer

How to regulate the voltage of dry type transformer?

There are two main voltage regulation methods for dry type transformer: direct voltage regulation method and indirect voltage regulation method.

1.Direct voltage regulation

The direct voltage regulation method changes the ratio of the transformer and realizes the voltage adjustment by drawing a tap on the primary winding of the dry transformer and connecting it with the tap changer. This method is usually suitable for occasions where frequent voltage adjustment is required or the voltage adjustment range is large.

2.Indirect voltage regulation

Indirect voltage regulation is realized by series dry type transformer. This method is usually used when the voltage needs to be fine-tuned or the voltage adjustment range is small. By adjusting the turn ratio of the series transformer, the voltage output of the whole transformer system can be changed.

Announcements

Safe operation: When performing dry transformer voltage regulation, staff must follow safe operating procedures to ensure their own safety.

Accurate measurement: Before adjusting the voltage, the current voltage value needs to be accurately measured in order to determine the amplitude and direction of adjustment.

Gradual adjustment: The voltage should be adjusted gradually to avoid voltage instability or equipment damage caused by excessive one-time adjustment.

Monitoring and feedback: In the process of voltage regulation, the voltage change should be monitored in real time, and the corresponding adjustment should be made as needed. At the same time, it is important to pay attention to the operating status of the device, which can ensure that the device remains stable during the voltage regulation process.

dry type transformer

Why do dry type transformer need voltage regulation?

The reason of dry transformer voltage regulation is mainly related to the stability of grid voltage and the quality of power supply.

1.Power grid voltage stability requirements

When the transformer is in normal operation, the secondary voltage will also change frequently due to the load change or the change of the primary power supply voltage. This variation causes a difference between the actual voltage and the rated voltage at each point in the grid, which is called voltage offset. The existence of voltage offset is inevitable, but too large offset will affect the quality of power supply and even cause damage to the electrical equipment. Therefore, in order to maintain the stability of the power grid voltage, the transformer needs to be regulated.

2.Power supply quality assurance

Power supply quality is one of the important indexes to measure the running condition of power system. And voltage stability is the key factor of power supply quality. Voltage regulation of the transformer can ensure that the voltage of the client is kept within the rated range, and avoid equipment damage or abnormal operation caused by too high or too low voltage. In addition, stable voltage can also improve the efficiency and service life of electrical equipment and reduce energy consumption and operation and maintenance costs.、、