Abstract: Premium power park (PPP) is an important aspect of the application of custom power technology, and its application range covers traditional industry, the modern financial and IT industry. Firstly, the operation of two typical PPP cases, Delaware and Sendai City power supply system demonstration base of multilevel electric energy quality, is analyzed, and the application of PPPs to others country at home and abroad is introduced briefly in this paper. Then, the development status of PPP topological structure is also discussed from such aspects as power supply mode, supplied load type and compensation ability of custom power equipments. In the end, the future research and development direction of PPP is analyzed wholly, which provides a reference for planning and construction of PPP in the future.