DISTRIBUTED GENERATION (DG) MODELING CRITERIA SWEDE 2016 April 26, 2016 Ron Shipman Oncor Asset Planning Distribution

Modeling Criteria DER Connections< 10 KW – No Service Study 11/12/2018 DER Connections< 10 KW – No Service Study Record of location - tracking tool DER Connections< 1MW – Service Study Record of location Transformer loading Proper Connectivity DER Connections> 1MW – Impact Study Customers Facilities Voltage/Loading Study Coordination Operation Transfer Trip Requirements

Type Distribution Studies 11/12/2018 ERS – up to 10 MW PV – 1.0 to 10 MW Pipeline Flow Generation Wind 2.0 MW Back-up generation up to 15 MW

DG RENEWABLES COUNT AND CAPACITY 4/26/2016

ONCOR INTERCONNECTED DG CAPACITY MW 4/26/2016

ONCOR DG INTERCONNECTION ACTIVITY 4/26/2016

QUESTIONS 4/26/2016

SAFETY Electrical Equipment and Placard Requirements Oncor requires placards at the utility meter to help employees know there is a DG system on-site and where they can disconnect it if necessary PUC rule §25.212 requires customers furnish and install a disconnect device with visible break and capable of being locked in the open position Certified systems meet UL-1741 and the applicable provisions of IEEE1547 regarding safety and disconnect requirements For non-certified systems Oncor requires specific relaying elements for protection 4/26/2016