Requirements for Frequency and Voltage Ride Through Capability of Small Generating Facilities

The Federal Energy Regulatory Commission (Commission) is modifying the pro forma Small Generator Interconnection Agreement (SGIA). The pro forma SGIA establishes the terms and conditions under which public utilities must provide interconnection service to small generating facilities of no larger than 20 megawatts. The Commission is modifying the pro forma SGIA to require newly interconnecting small generating facilities to ride through abnormal frequency and voltage events and not disconnect during such events. The specific ride through settings must be consistent with Good Utility Practice and any standards and guidelines applied by the transmission provider to other generating facilities on a comparable basis. The Commission already requires generators interconnecting under the Large Generator Interconnection Agreement to meet such requirements, and it would be unduly discriminatory not to also impose these requirements on small generating facilities. The Commission concludes that newly interconnecting small generating facilities should have ride through requirements comparable to large generating facilities.