Multi-energy mutual-aid power supply system for thermal power plant and control method thereof

Abstract

The invention discloses a multi-energy mutual-aid power supply system for a thermal power plant and a control method thereof. The multi-energy mutual-aid power supply system comprises a multi-energy current collection voltage bus section DNM, a switching-on synchronizing device TQJ1, a wind power plant special line L1 and a solar power generation special line L2 which are connected in parallel. Electric energy generated by wind and solar power plant is used as a working power supply of a thermal power plant, and a thermal generator set is used as a standby and supplementary power supply to form a multi-energy mutual-aid power supply system for the thermal power plant. Coal consumption of the thermal power plant is reduced, and primary resources are saved; the discharge amount of waste pollutants is reduced, and the comprehensive benefits of the environment are improved; renewable wind energy and solar energy resources are fully utilized, the utilization rate of wind power equipment andsolar energy equipment is improved, and asset benefits are improved; the thermal power plant equipment and adjusting capacity are brought into full play, fluctuating wind energy and solar energy areeliminated from auxiliary power, and stable and high-quality electric energy is provided for an external power grid. The power supply system is simple in structure, mature in technology, low in failure rate, high in reliability, simple in manufacturing cost and daily operation and maintenance and low in cost.

Description

technical field [0001] The invention relates to the field of electric power supply and distribution, relates to the power supply technology of thermal power plants, in particular to a multi-energy mutual aid thermal power plant power supply system and a control method thereof. Background technique [0002] Because of its basicity and flexibility, coal power is the main body that provides electricity and electricity. The annual utilization hours of equipment are about 4,200 hours, the annual power generation is about 4.2 trillion kWh, about 1.3 billion tons of coal needs to be burned, and 3.4 billion tons of carbon dioxide emissions. The pressure on resource consumption and the environment is enormous. Wind and solar power generation is about 0.5 trillion kWh, the annual utilization hours of wind power equipment is 1950 hours, and the annual utilization hours of solar energy equipment is 1200 hours. There is still room for improvement in the utilization rate of power generati...

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Problems solved by technology

[0010] Aiming at the problem that thermal power plants in the prior art cannot provide multi-energy mutual aid, the purpose of the present invention is to provide a multi-energy mutual aid thermal power plant plant power supply system and its control method, using the electric energy produced by wind and solar power plants as The working power supply of thermal power plant, and the thermal power generator set is used as backup and supplementary power supply to form a multi-energy mutual aid thermal power plant power supply system

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