1) The document discusses using ZigBee technology to manage a smart grid power system. ZigBee is a low-cost wireless networking standard that can be used to reliably transmit data in a smart grid network.
2) A smart grid system is proposed that uses ZigBee modules and a microcontroller to control energy from renewable sources like solar and wind. This system aims to efficiently distribute energy generated from renewable resources to meet demand.
3) Traditional power systems are centralized with one-way energy flow from plants to consumers. Smart grids aim to tackle increasing demands, reduce costs, use less fossil fuels, and incorporate renewable energy sources through advanced monitoring, distribution and control technologies.