Molten salt tower type photovoltaic power station steam-driven cold salt pump system

Abstract

The invention provides a molten salt tower type photovoltaic power station steam-driven cold salt pump system. The system comprises a cold salt pump, a speed reducer, a cold salt pump steam turbine, apower station steam turbine, a power station air cooler and a cold salt tank; one end of the cold salt pump is connected to the speed reducer, the other end of the cold salt pump is connected to thecold salt tank, and the speed reducer, the power station steam turbine and the power station air cooler are all connected to the cold salt pump steam turbine. According to the molten salt tower type photovoltaic power station steam-driven cold salt pump system, operation of the cold salt pump is driven by the cold salt pump turbine to replace a high-voltage motor to drive, the steam source of thecold salt pump steam turbine is steam extraction of the power station steam turbine, due to the stability of the steam source, an inlet container, a high-pressure air compressor, a protective power supply (UPS or a diesel generator) and the like can be removed, and compared with the increased cold salt pump turbine, initial investment of the power station can be greatly reduced; and in addition, own demand of the power station can be reduced, and the operation safety and reliability of the system can be improved.

Description

technical field [0001] The invention belongs to the technical field of high-temperature solar molten salt tower-type photothermal power generation, and in particular relates to a steam-driven cold salt pump system of a molten salt tower-type photothermal power station. Background technique [0002] With the gradual shortage of fossil fuels, the proportion of renewable energy power generation in the market is also increasing, and solar energy resources are the largest reserves of all renewable energy sources, and the installed capacity of solar power generation has been increasing year by year. [0003] At present, the installed capacity of large-scale molten salt tower solar thermal power station is 100MW, and the cold salt pump configuration scheme adopted is 4×33% or 3×50% scheme. The motor of a single cold salt pump using this scheme is a 6kV high-voltage motor with a power of about 3~4MW. In this way, the plant power consumption will reach nearly 10MW when the unit is ...

AI Technical Summary

Problems solved by technology

Therefore, there is still a certain risk of safety and reliability in the use of motor drive.

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