Strategic micro-grids for the improved reliability of future power systems

Operation of future power systems with increased integration of intermittent distributed generation can be challenging if they are integrated without strategic benefits. Existing network infrastructure does not necessarily have the potential to absorb a large fleet of distributed generation (DG). In such a context, the barriers to integrate large volumes of DG can be limited by strategically integrating micro-grids in future power systems because they have the ability to release hidden capacity of power systems. This paper investigates this problem in detail and proposes an algorithm to determine strategic micro grids that can improve the reliability of future power systems. The approach treats micro-grids as controllable entities that can strategically provide standing reserve and reactive supports as needed. A set of case studies are performed and results depict that strategic micro grids provide a considerable improvement in system reliability while facilitating increased integration of DG.