What is a cascade energy storage power station

What is a cascade hydropower plant & pump station?

The CESS is an integrated system of cascade hydropower plants and pump stations, whose main function is to consume excess energy from renewables, while satisfying water and energy demands for the public. Essentially, the CESS belongs to a kind of pumped storage power station.

Can pumped storage power stations be built among Cascade reservoirs?

The construction of pumped storage power stations among cascade reservoirs is a feasible way to expand the flexible resources of the multi-energy complementary clean energy base. However, this way makes the hydraulic and electrical connections of the upper and lower reservoirs more complicated, which brings more uncertainty to the power generation.

Why do we need pumped storage power stations?

Hence, construction of pumped storage power stations can effectively improve the flexibility of the clean energy base and support the depth of new energy consumption .

Can pumped storage power stations support a high-quality power supply?

Hence, to support the high-quality power supply, this research explores the complementary characteristics of the clean energy base building different types of pumped storage power stations, and recognizes the efficient operation intervals of the giant cascade reservoir.

What is the eficiency of a cascade hydropower system?

The eficiency is defined as a ratio of reduced renewable energy curtailment to increased hydropower pro-duction, and it is calculated based on two scenarios (i.e., optimal oper-ations of the cascade hydropower system and CESS). A case study using China’s Longyangxia-Laxiwa CESS was conducted.

Why do we add PSPS between Cascade reservoirs?

For HWPPHS, regardless of the season, more than 20 percent of the electricity in the transmission channel is supplied by hydropower. Hence, adding PSPS between cascade reservoirs can generate more stable and larger power to the transmission channel. Fig. 22.