With the continuous in-depth development of clean energy and the more and more extensive application of new energy, the demand for flexible DC transmission devices is growing rapidly, and the requirements for its performance and reliability are also increasing. HVDC smart, based on the crimped IGBT technology route, has the technical characteristics of high power density, high efficiency, high reliability, high degree of localization and strong environmental adaptability. It can provide in-depth customized solutions and full life cycle product services according to the functional and environmental requirements of engineering applications.