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Combined Heat and Power Partnership

Oregon Interconnection Standards

Date Last Updated11/16/2012
Policy TypeInterconnection Standard
State/FederalOR
Policy Administrator/Contact OfficeOregon Public Utility Commission (PUC)
Policy Initiation Date7/24/2007
Policy SummaryOregon has three categories of interconnection standards that apply to CHP, one for net-metered systems, one for non-net-metered small facilities, and then one for non-net-metered large facilities.

Net-metered Systems: There are two separate interconnection standards for net-metered systems in Oregon, one for the state's two investor-owned utilities (Pacific Gas & Electric (PG&E) and PacifiCorp), and another for municipals, cooperatives, and people's utility districts.

For net-metered systems in investor-owned utility territory, the three levels of interconnection are:
  • Level 1: applies to certified, inverter-based systems <25 kW that comply with IEEE standards and UL 1741. A system is considered "certified" if it has been submitted by a manufacturer to a nationally recognized testing lab, and has been tested and listed by the lab. Systems must pass specific technical screens. Utilities may not charge application fees or other fees for Level 1 review.
  • Level 2: applies to certified systems <2 MW that comply with IEEE standards and UL 1741. Interconnection to area networks is permitted, with limitations. Utilities may charge fees of up to $50 plus $1 per kW of system capacity, plus "the reasonable cost of any required minor modifications to the electric distribution system or additional review." Costs for engineering work performed as part of an impact study or interconnection facilities study are limited to $100 per hour.
  • Level 3: applies to systems that do not qualify for Level 1 or Level 2 review. Interconnection to area networks is permitted, with limitations. Utilities may charge fees of up to $100 plus $2 per kW of system capacity, plus charges for time spent on any required impact or facilities studies. Costs for engineering work performed as part of an impact study or interconnection facilities study are limited to $100 per hour. If a utility must install facilities in order to accommodate the interconnection of a system, the applicant must pay for the costs of such facilities.
For net-metered systems in municipal utility districts, cooperatives, and people's utility districts, the state requires that interconnection be available pursuant to OR Revised Statutes 757.300. Systems that generate electricity using solar power, wind power, hydropower, fuel cells or biomass resources are eligible. Net-metered systems must be intended primarily to offset part or all of a customer's requirements for electricity. The aggregated capacity of all net-metered systems is limited to 0.5% of a utility's historic single-hour peak load.

Small Generator Interconnection: There are statewide standards for interconnection of small generator facilities <10 MW, with four tiers of review based on system capacity.
  • Tier 1: applies to systems <25 kW. An application fee of $100 is charged for this tier.
  • Tier 2: applies to systems <2 MW. An application fee of $500 is charged for this tier.
  • Tier 3: applies to non-exporting systems <10 MW. An application fee of $1,000 is charged for this tier, including any addition costs due to supplemental review needs.
  • Tier 4: applies to systems seeking to export power to the grid or systems <20 MW. An application fee of $1,000 is charged for this tier, including any additional costs due to supplemental review needs.
Large Generator Interconnection: The third set of statewide interconnection standards is for large generator facilities, applicable to systems >20 MW. The PUC approved interconnection procedures and a standard interconnection agreement based on The Federal Energy Regulatory Commission's (FERC) Large Generator Interconnection Procedures and Large Generator Interconnection Agreement.
CHP Eligibility RequirementsBoth fossil-fueled and renewably-fueled CHP systems are eligible for standardized interconnection.
Eligible Project Size (MW)Greater than 20 MW for large generators; Up to 10 MW for small generators; 25 kW for residential net metered; 2 MW for non-residential net metered.
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