Exploration of ways to improve the performance of solid insulation materials for power transformers

The ways to improve the performance of solid insulation materials for power transformers mainly include the following aspects:

1、 Material selection and modification

1. Choose high-performance insulation materials: Choose solid insulation materials with excellent electrical, mechanical, and thermal stability properties, such as new polymer materials such as linear low-density polyethylene containing nanomaterials, to improve the insulation performance of transformers.

2. Material modification technology: Modify existing insulation materials through chemical or physical methods, such as cyanoethylation and acetylation modified cellulose insulation paper, to enhance their heat aging resistance and mechanical strength. At the same time, adding heat stabilizers and other additives can also improve the overall performance of the material.

2、 Optimization of insulation structure design

1. No partial discharge design: When designing the insulation structure of transformers, it should be ensured that the initial partial discharge voltage is greater than the voltage that the part is subjected to during the partial discharge test. Avoid electric field concentration, minimize the occurrence of sharp corners, and avoid using insulation materials with large differences in dielectric constant.

2. Introducing the concept of field strength: Introducing the concept of field strength in insulation structure design to improve insulation performance by optimizing electric field distribution. For example, adding an insulation layer on the electrode surface to improve the electric field in adjacent oils.

3、 Manufacturing process improvement

1. Remove moisture and bubbles from the insulation: Dip the solid insulation material into paint or glue to ensure immersion quality and improve insulation performance. This needs to be done under certain temperature or vacuum conditions.

2. Improve the working conditions of insulation: take measures to prevent moisture intrusion, overload, harmful gases and pollutants from corroding the insulation, and strengthen heat dissipation and cooling to extend the service life of insulation materials.

4、 Intelligent monitoring and maintenance

1. Develop intelligent transformer technology: Utilize sensors and other technologies to monitor and diagnose the operating status of transformers in real time, detect and handle potential insulation faults in a timely manner, and improve the reliability and stability of transformers.

2. Regular maintenance and overhaul: Develop a reasonable maintenance and overhaul plan, conduct regular insulation performance testing and evaluation of transformers, and ensure that insulation materials are in good working condition.

In summary, by selecting and modifying materials, optimizing insulation structure design, improving manufacturing processes, and implementing intelligent monitoring and maintenance, the performance of solid insulation materials for power transformers can be effectively improved, ensuring the safe and stable operation of the power system.