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.
What is a cascade hydropower system?
The system consists of cascade hydropower plants, a pumping station added between two hydropower plants, and PV power plants, multiple energy sources are bundled for transmission and consumption through the hydropower transmission network.
What is a cascade hydropower retrofit?
Cascade hydropower retrofits typically utilize reservoirs with large regulation capacities as upper reservoirs and daily or seasonally regulated reservoirs as lower reservoirs, enabling daily, weekly, or monthly energy storage. However, the different energy storage capabilities of pumping stations can impact the multiscale operation of HPSH plants.
What are the parameters of a cascade hydropower plant?
Parameters of the cascade hydropower plants. Based on the optimization principle of HPSH, pumping stations can be integrated into cascade hydropower plants with strong storage regulation capacities and large elevation differences .
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.
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