Application scenarios: special application environments such as small-scale industry and commerce, centralized power supply for villas and villages, or public institutions (schools, churches, health hospitals, etc.), island areas, power supply for military border posts, desert power-free areas, etc. Industrial and commercial peak shaving and valley filling energy-saving applications, wind and light abandonment applications of new energy, power regulation and SVG at power grid and power generation side, microgrid and island applications.Highlights: wide voltage range at DC side, three-level topology, modular design, multiple parallel screens