Compact Substation has the remarkable features of small size, small footprint, easy installation and reliable operation. Its material is usually a high-strength, lightweight metal shell, and internal components such as transformers and circuit breakers use high-performance insulation materials and advanced electromagnetic materials to ensure safety and efficiency. The advantages of compact substations are that they significantly reduce land occupation, reduce construction costs, shorten construction periods, and are easy to maintain and expand. They are widely used in urban power grid transformation, industrial parks, wind farms, solar power stations and other places where land resources are tight or power facilities need to be deployed quickly, effectively improving the reliability and flexibility of power supply.