Green electricity-coal electricity coupling power generation system and method utilizing renewable energy abandoned electricity

Abstract

The invention discloses a green electricity-coal electricity coupling power generation system and method utilizing renewable energy abandoned electricity. The green electricity-coal electricity coupling power generation system comprises an air feeder, an air preheater, a boiler, a coal mill, a primary wind powder electric heater, a secondary wind power heater, a power source, a coal powder burner and a wind power / photovoltaic power generation system. The renewable energy abandoned electricity is used as an electric power source of the primary wind powder electric heater and the secondary wind power electric heater, the renewable energy abandoned electricity is fed into the furnace in the form of primary wind powder and secondary wind heat energy, and efficient electricity-electricity conversion of the abandoned electricity is achieved while renewable electric energy consumption is achieved. In addition, the coal pulverizing system can quickly adapt to renewable energy load changes based on the operation flexibility of the coal pulverizing system, and the coal consumption can be reduced by adjusting the amount of coal entering the coal pulverizer while the output power of the unit is kept to be certain.

Description

technical field [0001] The invention belongs to the field of coal-fired power generation, and in particular relates to a green power-coal-power coupled power generation system and method using renewable energy to abandon power. Background technique [0002] At present, the installed capacity of renewable energy such as wind power and photovoltaics is continuously increasing, but the volatility, intermittency and randomness of wind and solar resources make the electricity generated by them unable to be consumed in time, resulting in serious abandonment of wind and solar power. Especially in winter, the limited peak shaving capacity of thermal power units results in a large number of wind power and photovoltaics not being able to connect to the Internet, resulting in abandonment of wind and light, waste of a lot of resources, and how to improve the consumption capacity of renewable electricity is an urgent problem to be solved. The Chinese Patent Application No. 202110992618.0...

AI Technical Summary

Problems solved by technology

[0002] At present, the installed capacity of renewable energy such as wind power and photovoltaics continues to increase, but the volatility, intermittency, and randomness of wind and solar resources prevent the power generated by them from being consumed in time, resulting in serious wind and solar abandonment.

Especially in winter, the peak-shaving capacity of thermal power units is limited, so that a large number of wind power and photovoltaic power cannot be connected to the grid, resulting in abandoned wind and light, wasting a lot of resources, how to improve the capacity of renewable power consumption is an urgent problem to be solved

The Chinese patent with the application number 202110992618.0 discloses a flexible operation system for wind power photovoltaic power generation auxiliary coal-fired units. Although wind power and photovoltaic power generation during unstable operation can be used to heat molten salt, it achieves the power consumption of abandoning wind and light. purpose, but limited by the working temperature of molten salt, the thermoelectric conversion efficiency is not high, and there is room for further improvement

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