The retirement of large baseload generating units that once provided essential support to the bulk power system is creating real-time reliability challenges with regard to the inertia-related services these units provided; namely ramping or load following capability, voltage support and frequency response. Increase in natural gas generation, rapid expansion of wind, solar, use of demand response and distributed generation is transforming the generation mix landscape. The new resources that are being deployed exhibit different characteristics with respect to these fundamental components of reliable operation.

North American Electric Reliability Corporation's (NERC) video tutorials explaining the essential reliability services    

  1. Load Ramping Load Ramping
  2. Voltage Voltage
  3. Frequency Frequency


Related Links

Report from NERC Urges States to Consider Essential Reliability Services, Reserve Margins, Project Timelines in Rule Implementation
NERC Essential Reliability Services Task Force Measures Framework Report
Federal Energy Regulatory Commission Proposed Rule on the Essential Reliability Services and the Evolving Bulk-Power System-Primary Frequency Response