Title :
Energy management in grid connected PV systems with supercapacitor energy storage
Author :
Kang, Qing ; Xiao, Xi ; Yi, Hu ; Nie, Zanxiang
Author_Institution :
Dept. of Electr. Eng., Tsinghua Univ., Beijing, China
Abstract :
A grid connected photovoltaic(PV) generation system with supercapacitor energy storage in a dc-coupled structure is proposed. The objective of this system is acquiring maximum power from PV arrays, keep the voltage of dc bus constant and supply the prescribed active and reactive power to power grid. An improved Perturbation and Observation (P&O) maximum power point tracking(MPPT) algorithm is applied to extract maximum power from PV arrays. The dc bus voltage is controlled via supercapacitor by charging and discharging. Constant active and reactive power control strategy is designed for the controller of DC/AC converter. Simulation results illustrate the performances obtained.
Keywords :
DC-AC power convertors; energy management systems; maximum power point trackers; photovoltaic power systems; power grids; reactive power control; supercapacitors; DC-AC converter; PV arrays; dc-coupled structure; energy management; grid connected photovoltaic systems; maximum power point tracking; perturbation and observation; reactive power control strategy; supercapacitor energy storage; Inverters; Power generation; Power grids; Reactive power; Supercapacitors; Voltage control;
Conference_Titel :
Electrical Machines and Systems (ICEMS), 2011 International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4577-1044-5
DOI :
10.1109/ICEMS.2011.6073393
