Power control method of non-grid multi-energy collaborative power supply electrolytic aluminum system

Abstract

The invention relates to a power control method of a non-grid multi-energy collaborative power supply electrolytic aluminum system. The electrolytic aluminum system comprises an electrolytic aluminum device, a wind power generation device and a solar power generation device, wherein the wind power generation device and the solar power generation device supply power to the electrolytic aluminum device in a non-grid mode, and waste heat emitted by the electrolytic aluminum device is recycled to generate power to be supplied to an aluminum electrolysis tank. In daytime, electricity quantity supplied to the aluminum electrolysis tank by the utility grid is the lowest electricity quantity required by heat preservation operation, and electricity quantity generated by the wind power generation device and the solar power generation device serves as supplementary. At night, limit on electricity quantity supply to the aluminum electrolysis tank by the utility grid is concealed. The method can adapt to fluctuation of wind power and solar power generation, fully utilize the peak valley price difference of the utility grid to promote economic efficiency in enterprises, assist the utility grid to achieve peak shaving, and reduce peak shaving difficulties caused by large difference between peak load and valley load.

Description

technical field [0001] The invention relates to a power control method of an electrolytic aluminum system for non-grid-connected multi-energy cooperative power supply, and belongs to the technical field of electrolytic aluminum systems. Background technique [0002] Since the reform and opening up, my country's national economy has continued to develop at a high speed, and the total economic volume has continued to leap to a new level. With the rapid economic development, my country's electricity demand is also growing rapidly. In 2012, the electricity consumption of the whole society in my country reached 4,959.1 billion kwh, a year-on-year increase of 5.5%. From 1980 to 2012, the electricity consumption of the whole society in my country increased by 16.8 times, with an average annual growth rate of 9.2%. [0003] Coal is the main energy source in my country, accounting for about 70% of the total primary energy consumption. In 2012, my country's coal power installed cap...

AI Technical Summary

Problems solved by technology

However, like the traditional electrolytic aluminum device, the power fluctuation generated by the wind-solar complementary electrolytic aluminum device will have a great impact on the power grid, and it cannot make full use of the peak-valley difference of the power grid to improve the economic benefits (profits) of the enterprise, nor can it solve the problem of high Impact of Power Fluctuation of Loaded Electrolytic Aluminum Plant on Public Grid