Research On Energy Management Of Multi Energy Integrated Power Supply System For Antarctic Scientific Research Station

Supported by the key R&D program of the Ministry of science and technology,"research and development of polar environment observation/detection technology and equipment"(Project No.: 2016YFC1400300),this paper is an applied research on the multi-functional integrated power supply system of Antarctic scientific research station.As an important part of the global ecosystem,the climate of Antarctic ecosystem will directly affect the global ocean circulation,atmospheric circulation and climate change.Therefore,the climate dynamics in Antarctica have a significant impact on global climate change,and scientists all over the world have increased their efforts to monitor the Antarctic environment.However,in addition to satellite remote sensing monitoring,it is still difficult for most of the scientific research station in Antarctica to supply power for a long time.In this paper,the energy management of multi energy integrated power supply system of Antarctic scientific research station is studied,in order to solve the energy supply problem of scientific research equipment in Antarctic extreme environmental conditions.Aiming at the special geographical and climatic environment in Antarctica,this project focuses on the energy management of the multi-functional integrated power supply system of the Antarctic scientific research station,so that the scientific research equipment can work continuously in the extreme environment.As the energy storage device of the whole power supply system,the performance of battery becomes worse in the extreme low temperature environment in Antarctica,and the discharge capacity cannot be estimated.Therefore,the focus of this paper is to study the low-temperature performance of battery and its discharge capacity estimation,as well as the energy management of the whole power supply system.The specific work is as follows:Firstly,this paper presents the design scheme and structure of the multi-energy integrated power supply system of the Antarctic scientific research station,which is mainly composed of wind,light,diesel generator and battery.The working principles of the wind turbine,photovoltaic cells and diesel generators,the performance parameters of the storage battery,and the mathematical models of the wind turbine and photovoltaic panels are studied.Based on the requirements of scientific research equipment and the extreme environment of Antarctica,the above equipment is selected,which lays a theoretical foundation for the follow-up work.Secondly,the working principle of LiFePO4 battery and the factors affecting its low temperature performance are studied.Using the selected LiFePO4 battery at different levels of temperature charge and discharge experiments,through the experimental results will find that: LiFePO4 battery in low temperature environment using small current charging effect is better.In addition,the correlation of low temperature discharge capacity and terminal voltage of LiFePO4 battery were obtained through low temperature discharge test: with the decrease of temperature,the discharge capacity of LiFePO4 battery will decrease.At 20?,10?,0?,-10?,-20?,-30?,-40?,-50? and nominal current 3A,the available capacity is 93%,86%,81%,78%,70%,64%,32% and 24% of the nominal capacity respectively.Based on the analysis of the correlation between discharge capacity and open circuit voltage of LiFePO4 battery,the discharge capacity estimation method of LiFePO4 battery at low temperature was proposed.Thirdly,according to the low temperature test of the battery,the heating strategy of the battery in low temperature environment is proposed.Then,the energy management strategy of multi energy integrated power supply system for Antarctic scientific research station is designed: and the control strategy of real-time tracking load power for energy scheduling of wind solar hybrid power generation system,diesel generator and battery is given,so that the power supply system can realize reliable power supply to the load.And the optimal control of wind and solar power in the system energy management strategy is solved by particle swarm optimization algorithm to control the output power of wind turbines and photovoltaic cells,so as to balance the power of power supply system and meet the principle of energy management.Finally,the new energy generation simulation platform is used to verify the energy management strategy.The experimental results show that the energy management strategy proposed in this paper can meet the load demand under different conditions and realize real-time energy scheduling in the Antarctic polar day and night environment.