Currently, photovoltaic technology is rapidly advancing, and competition in the industry is becoming increasingly intense. The decreasing prices of silicon wafers and modules have led to a growing demand for photovoltaic installations. The installed capacity and installed share of photovoltaics in power systems are increasing, promoting the transformation of traditional power systems to novel power systems; this maximizes the consumption of new energy as the main task and is supported by source-network-load-storage interactions and multi-energy complementation. Using the Manwan hydro-solar hybrid base as a model, the role of hydro-solar hybrids in source-network-load-storage interactions and multi-energy complementation in novel power systems are discussed.