The modeling and optimization of wind farm layouts can effectively reduce the wake effect between turbine units,thereby enhancing the expected output power and avoiding negative influence.Traditional wind farm optimiz...The modeling and optimization of wind farm layouts can effectively reduce the wake effect between turbine units,thereby enhancing the expected output power and avoiding negative influence.Traditional wind farm optimization often uses idealized wake models,neglecting the influence of wind shear at different elevations,which leads to a lack of precision in estimating wake effects and fails to meet the accuracy and reliability requirements of practical engineering.To address this,we have constructed a three-dimensional 3D wind farm optimization model that incorporates elevation,utilizing a 3D wake model to better reflect real-world conditions.We aim to assess the optimization state of the algorithm and provide strong incentives at the right moments to ensure continuous evolution of the population.To this end,we propose an evolutionary adaptation degreeguided genetic algorithm based on power-law perturbation(PPGA)to adapt multidimensional conditions.We select the offshore wind power project in Nantong,Jiangsu,China,as a study example and compare PPGA with other well-performing algorithms under this practical project.Based on the actual wind condition data,the experimental results demonstrate that PPGA can effectively tackle this complex problem and achieve the best power efficiency.展开更多
The porkchop plot is the porkchop-shaped,computer-generated contour plot that displays the launch date and arrival date characteristics of an interplanetary flight path for a given launch opportunity between two celes...The porkchop plot is the porkchop-shaped,computer-generated contour plot that displays the launch date and arrival date characteristics of an interplanetary flight path for a given launch opportunity between two celestial bodies.We found that,when the gravity assistance of a planet is taken into account of an interplanetary transfer trajectory,the classical porkchop plot cannot give enough information for the interplanetary mission.In this regard,we have generalized the classical porkchop plot into the 3D porkchop plot that gives the launch,flyby,and arrival opportunity of the interplanetary mission.This paper presents an alternative opportunity for the Psyche asteroid mission with Mars’s gravity assist.Psyche is a largest M-type asteroid in the solar system and may be a good source of Platinum group metals.This paper also presents the analytical solution of the gravity assist model,which is useful for obtaining the optimal flyby radius and the optimal thrust impulse during the planetary gravity assist.展开更多
基金partially supported by the Japan Society for the Promotion of Science(JSPS)KAKENHI(JP23K24899)Japan Science and Technology Agency(JST)Support for Pioneering Research Initiated by the Next Generation(SPRING)(JPMJSP2145).
文摘The modeling and optimization of wind farm layouts can effectively reduce the wake effect between turbine units,thereby enhancing the expected output power and avoiding negative influence.Traditional wind farm optimization often uses idealized wake models,neglecting the influence of wind shear at different elevations,which leads to a lack of precision in estimating wake effects and fails to meet the accuracy and reliability requirements of practical engineering.To address this,we have constructed a three-dimensional 3D wind farm optimization model that incorporates elevation,utilizing a 3D wake model to better reflect real-world conditions.We aim to assess the optimization state of the algorithm and provide strong incentives at the right moments to ensure continuous evolution of the population.To this end,we propose an evolutionary adaptation degreeguided genetic algorithm based on power-law perturbation(PPGA)to adapt multidimensional conditions.We select the offshore wind power project in Nantong,Jiangsu,China,as a study example and compare PPGA with other well-performing algorithms under this practical project.Based on the actual wind condition data,the experimental results demonstrate that PPGA can effectively tackle this complex problem and achieve the best power efficiency.
文摘The porkchop plot is the porkchop-shaped,computer-generated contour plot that displays the launch date and arrival date characteristics of an interplanetary flight path for a given launch opportunity between two celestial bodies.We found that,when the gravity assistance of a planet is taken into account of an interplanetary transfer trajectory,the classical porkchop plot cannot give enough information for the interplanetary mission.In this regard,we have generalized the classical porkchop plot into the 3D porkchop plot that gives the launch,flyby,and arrival opportunity of the interplanetary mission.This paper presents an alternative opportunity for the Psyche asteroid mission with Mars’s gravity assist.Psyche is a largest M-type asteroid in the solar system and may be a good source of Platinum group metals.This paper also presents the analytical solution of the gravity assist model,which is useful for obtaining the optimal flyby radius and the optimal thrust impulse during the planetary gravity assist.
