A solar thermal heat storage system and method for deep peak regulation of cogeneration units

Abstract

The invention relates to a solar photothermal heat storage system and method for deep peak regulation of cogeneration units. By setting solar photothermal heaters and hot water heat storage tank systems in the thermal power unit system, during non-peak regulation periods, Use the solar thermal heater to heat the circulating water and cold water of the heating network. If the heating is insufficient, the exhaust steam of the medium-pressure cylinder of the unit can be extracted, and the cold water of the heating network is heated through the heat network heat exchanger, and the heated water is stored in the hot water storage tank. , during the period when it is necessary to participate in deep peak shaving, the hot water in the hot water storage tank is supplied to the primary network system of the heating network to achieve deep peak shaving, while reducing the power generation load and ensuring the continuous and stable operation of the unit. During the entire peak shaving process, solar thermal heating technology and hot water heat storage technology are used to improve the unit’s ability to connect to the grid for peak shaving, which saves the energy consumption of the unit’s operation and effectively alleviates the plight of Qinggu’s energy consumption.

Description

technical field [0001] The invention belongs to the technical field of electric energy, and in particular relates to a solar photothermal heat storage system and method for deep peak regulation of cogeneration units. Background technique [0002] In recent years, the increase in energy demand and the depletion of fossil energy have led to the rapid development of technologies related to renewable resources. In terms of electricity, wind power and photovoltaics have achieved sustained and rapid development, but there are also common technical problems, such as serious wind and solar curtailment. One of the main factors leading to the problems of curtailment of wind and light is the limitation of wind power and photovoltaic capacity. Consumption has become a key factor restricting the development of domestic wind power and photovoltaics, and the situation is becoming increasingly severe. To solve the problem of wind power and photovoltaic consumption, measures can be taken f...

AI Technical Summary

Problems solved by technology

[0012] Although the above technologies can achieve a certain peak-shaving effect, they cannot achieve the purpose of deep peak-shaving due to safety issues such as boilers and turbines.

For example, electric boiler technology only consumes electricity load internally and converts it into heat supply, which does not save energy; low-load operation will cause excessive emissions of system equipment such as desulfurization and denitrification

At the same time, in the existing steam extraction heat supply power plant, there are still problems of heat supply waste or insufficient heat supply when the peak shaving system performs power peak shaving

Images