With increased penetration of distributed energy resources (DERs), the likelihood of distribution backfeed into transmission increases. DERs’ effects must be considered when designing protection schemes and setting relays. There is concern that conventional fault clearing methods may not clear the fault, causing some equipment to become overstressed and subjecting transmission systems and customers to overvoltage and power quality issues. In this session learn how PG&E has established protection guidelines and has been able to interconnect large number of DERs. Through established protection guidelines, PG&E created quantifiable methodology to verify when mitigation is required and provide data for future evaluations.

Key Takeaways

• Safe DERs integration
• Protection considerations based on quantifiable methodology
• How to use generation mix, inverter certifications and System configuration to create methodology