Coordinating system protection and voltage quality with high DER integration
Managing transient over-voltages from inverter-based generation within 34kV limits
Estimating upgrade costs and aligning construction with utility standards
Assessing cumulative impact on feeder L19349 with existing DER
Securing permits, easements, and stakeholder alignment within timelines
Action
Conducted an Interconnection Facilities Study to determine distribution upgrades required for integrating the 3250 kW inverter-based PV facility with the distribution system.
Installed seven poles, including two replacements, a tap pole, and a 34kV guypole with arresters at the customer site.
Installed 34kV overhead DA Intellirupter, 34kV pole-mounted primary meter, and a 34kV 600A normally closed Pole Top Switch (PTS) to support grid automation.
Extended 150’ of 34kV 3-phase 477 B AL overhead line and reconfigured the existing 34kV line automation for seamless integration.
Modified TSS193 relay settings, coordinated system protection measures, and performed post-installation testing at TSS193 and the DER site.
Submitted IFA & IFC packages, including approved distribution design, Demarcation Drawing, Line location and Pole location, MRs for long-lead items, ROW/easement documentation, and permit applications to ensure regulatory compliance.
DST Value Addition
Designed and configured electrical components to ensure seamless interconnection with ComEd’s system
Ensured compliance with utility standards, including transformer winding and inverter voltage limits
Led system protection coordination and implemented upgrades to maintain grid stability
Adhered to study assumptions to support safe and efficient operation
Guided customer through site preparation, permitting, and compliance responsibilities
DST Value Addition
DST provided data, maps, charts, and calculations in a format easily accessible by ComEd.
DST successfully identified necessary grid upgrades and provided cost estimates for DER integration.
Throughout this program, DST ensured smooth communication and documentation, meeting regulatory and technical requirements for DER interconnection.
