| The stable supply of heating and power has a great significance on the industrial production,residents' life and economic development in plateau alpine region.However,the plateau alpine region is remote and has severe cold climate.In addition,the conventional energy is scarce,such as coal,oil,gas,etc.Thus,conventional energy is hard and expensive to transport and utilize;meanwhile,the reliability and quality of power and heat supply can hardly be guaranteed effectively.Although lack of conventional energy,renewable energy such as hydropower,solar energy and wind energy is rich and widely distributed in the plateau alpine region.Exploiting and utilizing renewable energy is an important choice and development trend for heating and power supply in those regions.However,renewable energy is featured with intermittency and volatility.It is unable to track power and heating load,and cannot continuously provide users with stable and reliable power and heating.Considering the above issues relating to the plateau alpine region,a novel energy supply system which integrated the renewable energy sources with energy storage facility was proposed.By combining with energy storage,the time-shifting of electric power and heat was realized.The energy system proposed not only solved the intermittent and volatility problems of renewable energy,but also achieved continuous and reliable output of electric and thermal energy.It improved the energy-independence in the plateau and alpine regions significantly.In addition,the system coupled the electric power and heating supply sub-system,featured with flexible adjustment,good reliability and high efficiency.This study focused on energy systems integrating the renewable energy and energy storage,and studied the methods of energy system integration,capacity optimization,and safe operation mainly with simulation and model verification.The specific research contents are listed below:Wind power generation,photovoltaic power generation,hydroelectric power generation,trough solar collector,heat storage system,electrical power storage devices and integrated control system were included in the proposed system and the components model was built.Based on the proposed system,an optimal sizing methodology using genetic algorithm was built,aimed at finding the configuration with optimal economy among a set of systems.Besides,a real-time energy management strategy,which took into account the performances of the components,was proposed to ensure the effective operation of the system.A model of the energy system integrating the renewable energy and the battery storage was constructed.The system dynamic simulation was studied by genetic algorithm.The proposed energy system was designed to supply an isolated residential community with heating and power demands in frigid plateau region.Different configurations were compared in terms of economy,reliability and environmental protection.Besides,the energy management strategy and operational characteristics research were carried out.Finally,a sensitivity analysis on key parameters of the energy system was also studied to examine their effects on the annualized cost of the system(ACS).The simulation results reveal effects of renewable energy,technical parameters and component cost on the configuration and ACS.The model of the energy system integrating the renewable energy and the hydrogen energy storage was constructed.The fuel cell model was verified and effects of current density,pressure,temperature,oxygen volume fraction,heat utilization on the fuel cell were conducted.Afterwards,a case study was conducted to minimize the annualized cost of the system based on generic algorithm.The proposed energy system was designed to supply an isolated residential community with heating and power demands in frigid plateau region.The feasibility,operation characteristics and sizing optimization methods of the proposed energy supply system in the plateau alpine region were explored. |
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