S11 oil-immersed power transformer is a common transformer, which is widely used in power system step-up, step-down and liaison functions. Compared with the traditional oil-immersed transformer, the S11 series transformer has improved its technical performance, economic indicators and environmental protection, so it has been widely used in the power industry.

First, the working principle

The working principle of the S11 oil-immersed power transformer is based on the principle of electromagnetic induction, which realizes the conversion of voltage, current and impedance through the electromagnetic coupling between the primary and secondary windings. Specifically, when the primary winding is connected to an AC power source, an electric current flows through the winding, creating an alternating magnetic field. This magnetic field causes the secondary winding to induce an electromotive force, which realizes the transformation of the voltage.

Second, structural characteristics

The S11 oil-immersed power transformer is mainly composed of iron core, winding, oil tank and transformer oil.

Iron core: The iron core is the main magnetic circuit part of the transformer, which is made up of silicon steel sheets with high permeability. It has good magnetic conductivity, which can reduce the magnetic resistance and improve the efficiency of the transformer.

Winding: The winding is the circuit part of a transformer, usually wound from insulated copper or aluminum wire. They are placed between the two magnetic pole faces of the iron core, forming the primary and secondary windings of the transformer.

Fuel tank: The fuel tank is the shell of the transformer and is used to house the transformer body and other accessories. It has good heat dissipation performance and is able to conduct the heat generated during the operation of the transformer into the air.

Transformer oil: Transformer oil is a mineral oil with good insulating properties, which is used to fill the space inside the transformer and play the role of insulation and heat dissipation. It can effectively reduce the insulation distance between the windings and improve the electrical performance of the transformer.

3. Performance parameters

The performance parameters of S11 oil-immersed power transformer include rated capacity, rated voltage, rated current, no-load current, no-load loss and load loss.

Rated capacity: refers to the apparent power that the transformer can output under rated operating conditions, in kVA or MVA.

Rated voltage: refers to the rated voltage value of the primary and secondary windings of the transformer under rated operating conditions.

Rated current: refers to the rated current value of the primary and secondary windings of the transformer under the rated operating conditions.

No-load current: refers to the input current value of the transformer under no-load operating conditions.

No-load loss: refers to the sum of the core loss and winding loss of the transformer under no-load operating conditions.

Load loss: refers to the sum of the core loss and winding loss of the transformer under the rated load operating condition.

Fourth, use and maintenance

When using S11 oil-immersed power transformer, the following points should be noted:

Regularly check the operating status of the transformer to ensure that it is working properly;

Regularly check the oil level, oil temperature, oil quality and other indicators of the transformer to keep it in good operating condition;

Regularly carry out preventive tests of transformers, such as insulation resistance test, dielectric loss test, etc., to find and deal with potential faults in time;

Pay attention to the heat dissipation of the transformer to avoid long-term overload operation;

Strengthen the lightning protection measures of the transformer to avoid damage to the transformer caused by lightning;

Keep the transformer clean and prevent dust, debris, etc. from entering the transformer;

When replacing the transformer, a regular brand and reliable quality product should be selected to ensure its performance and service life.

In short, S11 oil-immersed power transformer, as a common power equipment, has a wide range of application prospects. Understanding its working principle, structural characteristics, performance parameters, and knowledge of use and maintenance will help to better use and maintain the equipment and ensure the stability and reliability of the power system.