A Power Generation System Based on Constant Pressure

Abstract

The invention discloses a power generation system based on constant pressure, including a high-pressure gas system, a gas-liquid mixing system, a hydraulic power generation unit, a channel switching system, a control system, and a water flow compensation pressure circulation system, a high-pressure gas system, a gas-liquid mixing system, The hydraulic generator set and the water flow compensation pressure circulation system are connected through the channel switching system and controlled by the control system; the water pump pumping compressed air adopts the frequency conversion operation mode with variable pipeline characteristics, so that the water pump can always run near the high efficiency area and maintain high efficiency , which reduces the power consumption of water pumping; the water turbine is stable near the rated water head during the power generation process, which can make the water turbine run near the highest efficiency area and generate more electric energy. Consuming less power and adding more power makes the overall power exchange efficiency of the system higher. The system not only has the function of conventional compressed air energy storage and pumped storage power station for large-scale storage of electric energy, but also has the characteristics of being independent of terrain drop, high efficiency, and long running time.

Description

technical field [0001] The invention relates to the technical field of new energy storage and power generation, in particular to a power generation system based on constant pressure. Background technique [0002] With the development of large-scale wind energy / photovoltaic resources, my country's wind power / photovoltaic development has maintained a strong momentum of rapid development. By the end of 2018, my country's renewable energy power installed capacity reached 728 million kilowatts, accounting for about 38.3% of the total power installed capacity , but the contradiction between the rapid development of new energy power generation and the relatively lagging power grid construction has become increasingly obvious. Large-scale wind power / photovoltaic energy connected to the grid with the characteristics of randomness, intermittency, anti-regulation and large output fluctuations has a great impact on the voltage stability, transient stability and frequency stability of the...

AI Technical Summary

Problems solved by technology

However, the traditional compressed air energy storage power stations represented by the Huntorf compressed air energy storage power station in Germany and the McIntosh compressed air energy storage power station in the United States rely on external natural gas fuel supplementation, have an impact on the environment, and have low conversion efficiency of high-pressure air to electricity (less than 50%). Relying on large-volume cave resources and inflexible layout

At present, the most advanced advanced adiabatic compressed air storage often requires at least tens of thousands of cubic meters of large-volume abandoned mines and caves to store high-pressure air, which is seriously dependent on cave resources, inflexible layout, and high investment costs (every few billion RMB) ), the process of energy storage and energy release is in an adiabatic process, and there are problems of easy escape of heat and low conversion efficiency

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