The invention relates to the technical field of energy conversion, and discloses a
cascade energy utilization
system, a scheduling control method and device, equipment and a medium. The
system comprises a
photovoltaic power generation module, an electric heater, a hot
molten salt tank, a cold
molten salt tank, a steam generator, a primary
heat exchanger, a secondary
heat exchanger, a first
water source heat pump unit, a second
water source heat pump unit, a plurality of valves and a control module, wherein the valves comprise a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a sixth valve and a seventh valve. The
system provided by the invention aims at an
energy system of a
sewage treatment
plant, high photovoltaic abandoned light, low efficiency of heat pumps,
waste heat waste and island operation pain points, depends on photovoltaic energy, fused salt heat storage, a two-stage
heat exchanger, double heat pumps and a
dynamic control framework, stores photovoltaic energy by utilizing a fused salt heat storage system, preheats
sewage through the two-stage heat exchanger, improves COP of the heat pumps, and reduces the
energy consumption of the heat pumps.
Waste heat is fully utilized, and dependence on a
power grid is reduced.