| With the development of technology and society,the consumption of energy in daily life increases accordingly.In the current energy consumption structure,it still relies on fossil fuels such as coal,oil and natural gas.However,the reserves of fossil fuels are limited on earth.These energies will be depleted in the future and the increase pollution of global environmental also becomes a serious problem.Therefore,the development and utilization of clean new energy sources are imminent.As an unlimited source of clean energy,solar energy has gained more and more attention in recent decades and is increasingly being used as an alternative fossil resource in power generation systems.In this paper,by investigating the basic working principle of photovoltaic cells,photovoltaic cell model and volt-ampere characteristics,several common methods of maximum power tracking are analyzed: Including the Constant Voltage Tracking method,the Perturb & Observe Algorithms method and the Increment Conductance method.The current vector control strategy of distributed photovoltaic grid-connected inverter is investigated,and the current hysteresis control strategy is introduced.Taking some company distributed PV grid-connected power generation project as an example,this paper first introduces the design requirements and design basis of the project,including the local geographical,meteorological conditions and relevant national regulations.Secondly,the project implementation plan was introduced,including the arrangement of components design,the introduction of major equipment,the entire photovoltaic system power generation and energy-saving emission reduction calculations.Finally,the advantages of the PV grid-connected system are analyzed. |
