NERC's recently published “Lessons Learned” for the North American utility industry provides new information regarding reliability risks and performance issues for systems with high dependence on wind resources for generation. With less synchronous generation online, an increasing number of power systems are expected to experience more periods with low inertia and low available fault current levels.
This “Lessons Learned” guidance followed system disturbances affecting the South Australia and Texas (ERCOT) electric grids. The key takeaways include:
NERC has recognized the changing nature of generation resources and, appropriately, is seeking to get ahead of the curve and inform utilities that may have yet to experience high proportions of wind resource penetration, but soon could, about operational issues that could ensue.