Based on the large-scale penetration of electric vehicles(EV)into the building cluster,a multi-objective optimal strategy considering the coordinated dispatch of EV is proposed,for improving the safe and economical op...Based on the large-scale penetration of electric vehicles(EV)into the building cluster,a multi-objective optimal strategy considering the coordinated dispatch of EV is proposed,for improving the safe and economical operation problems of distribution network.The system power loss and node voltage excursion can be effectively reduced,by taking measures of time-of-use(TOU)price mechanism bonded with the reactive compensation of energy storage devices.Firstly,the coordinate charging/discharging load model for EV has been established,to obtain a narrowed gap between load peak and valley.Next,a multi-objective optimization model of the distribution grid is also defined,and the active power loss and node voltage fluctuation are chosen to be the objective function.For improving the efficiency of optimization process,an advanced genetic algorithm associated with elite preservation policy is used.Finally,reactive compensation capacity supplied by capacitor banks is dynamically determined according to the varying building loads.The proposed strategy is demonstrated on the IEEE 33-node test case,and the simulation results show that the power supply pressure can be obviously relieved by introducing the coordinated charging/discharging behavior of EV;in the meantime,via reasonable planning of the compensation capacitor,the remarkably lower active power loss and voltage excursion can be realized,ensuring the safe and economical operation of the distribution system.展开更多
Growing penetration of wind power challenges to power system security,since the conventional generators may not have sufficient capacity to compensate wind power fluctuation plus the reverse peak regulation.In this pa...Growing penetration of wind power challenges to power system security,since the conventional generators may not have sufficient capacity to compensate wind power fluctuation plus the reverse peak regulation.In this paper,the high-capacity pumped-storage and fast-response battery-storage are coordinated to compensate the variation of both wind power and load,aiming at shifting peak load,responding to wind power ramping,reducing the curtailment of wind and stabilizing the output of thermal units.A practical framework is designed for optimizing the operation of the hybrid system consisting of the wind,pumped-storage,and battery storage,which can take full advantages of pumped-storage and battery-storage.The detailed mathematical formulations of the pumpedstorage and battery-storage are built.Three cases are studied to demonstrate the advantages of the proposed coordination method.展开更多
基金supported by Natural Science Foundation of Hunan Province(2017JJ5044).
文摘Based on the large-scale penetration of electric vehicles(EV)into the building cluster,a multi-objective optimal strategy considering the coordinated dispatch of EV is proposed,for improving the safe and economical operation problems of distribution network.The system power loss and node voltage excursion can be effectively reduced,by taking measures of time-of-use(TOU)price mechanism bonded with the reactive compensation of energy storage devices.Firstly,the coordinate charging/discharging load model for EV has been established,to obtain a narrowed gap between load peak and valley.Next,a multi-objective optimization model of the distribution grid is also defined,and the active power loss and node voltage fluctuation are chosen to be the objective function.For improving the efficiency of optimization process,an advanced genetic algorithm associated with elite preservation policy is used.Finally,reactive compensation capacity supplied by capacitor banks is dynamically determined according to the varying building loads.The proposed strategy is demonstrated on the IEEE 33-node test case,and the simulation results show that the power supply pressure can be obviously relieved by introducing the coordinated charging/discharging behavior of EV;in the meantime,via reasonable planning of the compensation capacitor,the remarkably lower active power loss and voltage excursion can be realized,ensuring the safe and economical operation of the distribution system.
基金This work was supported in part by the National Key Research and Development Program of China(2016YFB0900101)in part by the National Natural Science Foundation of China(51377027).
文摘Growing penetration of wind power challenges to power system security,since the conventional generators may not have sufficient capacity to compensate wind power fluctuation plus the reverse peak regulation.In this paper,the high-capacity pumped-storage and fast-response battery-storage are coordinated to compensate the variation of both wind power and load,aiming at shifting peak load,responding to wind power ramping,reducing the curtailment of wind and stabilizing the output of thermal units.A practical framework is designed for optimizing the operation of the hybrid system consisting of the wind,pumped-storage,and battery storage,which can take full advantages of pumped-storage and battery-storage.The detailed mathematical formulations of the pumpedstorage and battery-storage are built.Three cases are studied to demonstrate the advantages of the proposed coordination method.
