Construction of Test Facilities for Solid-State Transformer Using High-Speed Railway Vehicles

This paper describes the construction of test facilities for solid-state transformers for distributed power high-speed rail vehicles. The specifications of the solid-state transformer have an input voltage of 25㎸ AC and a rating of 4.2㎿. The transformer operates at high frequencies, enabling designs that are smaller and lighter than existing low-frequency transformers of tens of ㎐. The solid-state transformer has 14 modules connected in series, and each module consists of 3 cells. The verification process involves by increasing capacity and voltage, starting from individual cell tests, followed by module tests, series configuration tests, and system-level tests. Test facilities require not only the application of low voltages of hundreds of V to high voltages of up to 29㎸, but also loads and power facilities of hundreds of ㎾ to several ㎿. This paper presents a test plan and facility construction plan for a ㎿ range solid-state transformer.