Technology Capabilities and Criteria
During the last few years, as the prices of PV and energy storage are plummeting, microgrids are becoming cost-effective and attractive for a variety of power applications. Mini and microgrids using highly efficient/smart grid inverters are more than an alternative way to maintain energy supply or cut operational costs for any facility or municipality.
These grids generally operate in isolation to the electricity networks of the DISCOM grid (standalone), but can also interconnect with the grid to exchange power. In general, the grids enable key power system operational and which in turn can benefit developers in achieving a variety of added objectives, such as grid reliability, resilience in the face of harsh climate or natural disasters, and in meeting emissions reduction targets. The technology capabilities and criteria of the mini and micro grids are discussed here.
A RE-based electricity generator with a capacity of more than 10 kW used for supplying the electricity in a community in a rural area or island for household usage, commercial, productive, institutional, and industrial set up, etc., through a public distribution network. Combination of both alternative current (AC) and direct current (DC) systems are acceptable. Electrical parameters of an AC mini-grid system are given here and include components, such as generation plant, storage systems (batteries), inverters, distribution network. AC mini-grids: (i) 220 V 1 phase — up to 10 kWp (ii) 440 V 3 Phase — beyond 10 kWp .