In 2022

both the newly operation and approved pumped storage power plant capacity in China reached historic highs

and traditional fossil-fired power plants design institutes gradually entered the field of pumped storage power station design. The DC auxiliary power system is of importance for the safety of power plants and even the grid. This article compares and analyzesthe “Code for design of DC auxiliary power system for Hydropower Plants”and the “Technical code for design of DC auxiliary power supply system for Power Engineering”. Combining with a typical setting scheme of a certain pumping and storage power plant's DC system

it focuses on introducing the system settings

DC load type and list

battery selection

charging device selection

etc. of hydropower stations(taking pumping and storage power plants as an example) and fossil-fired power plants similarities and differences.