Research On Frequency Regulation Technology Of Flywheel Energy Storage Aided Thermal Power Unit

In order to cope with global problems such as energy security,climate change,and environmental challenges,countries around the world have stepped up their sustainable development strategies.In 2020.my country proposed "striving to reach the peak of carbon dioxide emissions in 2030,and strive to achieve carbon neutrality by 2060",and comprehensively promote Energy development and reform,build a diversified and clean energy supply system,and vigorously develop renewable energy.However,the large-scale grid connection of renewable energy has caused an impact on the frequency quality of the power system.The frequency of the power system is the most stringent item in the power quality standards,which seriously affects industrial production and people’s daily life.Thermal power generation is still the main body of my country’s power generation industry and plays a pivotal role in the field of power frequency modulation.However,frequent frequency modulation will aggravate the wear and tear of thermal power units,increase the fuel use of thermal power units,operating costs,waste emissions,and the system’s thermal reserve capacity.The steam pressure of thermal power units fluctuates drastically,which reduces the safety and economy of thermal power units.New technical methods are urgently needed to improve the power frequency modulation characteristics.Flywheel energy storage has outstanding advantages such as rapid response capability,high conversion efficiency,high energy storage density,environmental protection and pollution-free,and long service life.It is a good frequency modulation power supply.The use of flywheel energy storage to assist the frequency modulation of thermal power units can improve thermal power units The phenomenon of overshoot,undershoot,and reverse regulation improves the response speed and adjustment accuracy of thermal power units,reduces frequent actions of thermal power units,increases the service life of the units,and is more conducive to improving the frequency modulation characteristics of the power system and increasing the power system’s consumption of renewable energy.In this way,more renewable energy can be safely connected to the grid to achieve high-quality development of electric energy.This paper analyzes the status quo of power system frequency modulation and energy storage research,expounds the research progress and development trend of flywheel energy storage technology,and carries out the following research on flywheel energy storage auxiliary thermal power unit frequency modulation technology:First,in-depth study of thermal power unit control System characteristics,the physical process of the primary and secondary frequency modulation of the thermal power unit are analyzed,the governor,steam turbine,boiler,and coordinated control system model are established,and the thermal power unit’s participation in power frequency modulation is simulated and analyzed;second,the establishment of flywheel energy storage Mathematical model,study the control strategies of flywheel energy storage motors,grid-side and machine-side converters,simulate and analyze flywheel energy storage charging and discharging control characteristics,and establish electrochemical energy storage models to compare and analyze flywheel energy storage and electrochemical energy storage responses Characteristics;Third,establish a flywheel energy storage auxiliary thermal power unit frequency modulation scheme,explore the control strategy of the flywheel energy storage auxiliary thermal power unit,establish a flywheel array model and study the corresponding control strategy,and verify the flywheel energy storage auxiliary thermal power simulation with actual thermal power plant AGC data The effectiveness of the unit frequency modulation model.