Modern-day Power Grids: Scheduling High-Renewable-Energy Systems [Guest Editorial]

The integration of variable renewable energy (VRE) sources into the modern-day power grid is growing fast, driven by global environmental and economic concerns, renewable energy subsidies, and deregulation in the energy sector. However, the inherent intermittency and variability of power generation from VRE may cause a serious problem for supply-demand balance without proper coordination with energy storage and dispatchable generating units. Moreover, power generation from conventional dispatchable generating units is at the expense of significant operating cost.