Document Type : Research Article
Electrical engineering department, Amir kabir university, Tehran, Iran
Amirkabir University of Technology
Nowadays renewables are the ﬁrst choice option for a modern power system generation scenario. It relates to their high attraction specially environmental and cost aspects and also availability in almost all over the world. Wind and solar are now competitive with conventional sources and commanded a high percentage of investments in renewable power. The main challenge to use these cheap and clean energies is their output power uncertainty and variability may lead to wind/solar power curtailment or load shedding caused by not sufficient spinning and fast reserve. Energy storage systems integrated renewable energies are a common solution for this challenge but impose extra cost to planning and operation costs needs a suitable economic study for the best location and size of this systems.
In this paper a flexibility based approach is used to show the role of Battery Energy Storage System (BESS) in the wind/load curtailment reduction. This approach can lead to a suitable economic routine to determine BESS size based on economic trade-off between BESS fixed & variable costs and wind/load curtailment costs. In this paper at first the BESS flexibility index is introduced and the suitable State of Charge (SoC) control is presented to use for Dynamic Economic Load Dispatch (DELD) solution based on the wind/load curtailment reduction. The simulation results show the good dependency between system flexibility improved by BESS integration and the wind/load curtailment reduction.