Southern California Ed revises interconnect for expanded NextEra solar project

Southern California Edison on Sept. 28 filed with the Federal  Energy Regulatory Commission an Amended and Restated Large Generator Interconnection Agreement (LGIA) with Silver State Solar Power South LLC and the California Independent System Operator.

The LGIA provides the terms and conditions pursuant to which SCE and the CAISO will provide Interconnection Service to the 250-MW Silver State South Solar Project, located near Primm, Nevada, at SCE’s Primm 220-kV Substation at the 220-kV bus. The LGIA was accepted for filing by the FERC in November 2011. The parties have now agreed to revise that original LGIA to reflect changes in scope and costs for this project triggered by the 2014 Generator Interconnection Reassessment Reports dated August 2014 and October 2014, and other changes as determined through field engineering and actual conditions at the Primm Substation.

Among things, the developer has requested to increase the Generating Facility Capacity of the Silver State South Solar Project from 230 MW to 250 MW (ac). As a result, the interconnection of the Silver State South Solar Project is now separated into two parts. The first part includes the facilities to interconnect the initial 230 MW of generating resources, referred to as “Q467”. The second part the additional 20 MW of generating resources to the Silver State South Solar Project, referred to as “Q502”.

The new commercial operation target date for the project is Sept. 30 2016, instead of the original May 1, 2017.

The project consists of two three phase transformers rated for 230/34.5/13.8 kV 80/106/132 MVA with 7.5% impedance on an 80 MVA base, one hundred ninety-six (196) SMA inverters each rated at 0.775 MW and thirty (30) GE inverters each with a rated output of 3.6 MW for a collective total gross output of 259.90 MW at the inverter terminals. Losses through the collector system are estimated to total 4.3 MW, based on the electrical parameters provided, coupled with a 0.5 MW auxiliary load and two 0.15 MW station service loads results in a collective net output of 254.8 MW as measured at the high side of the two main transformer banks. Since the total output of the project exceeds the requested 250 MW, the capability at the Point of Interconnection for Interconnection Service will be limited to not exceed 250 MW.

Project contacts are: Silver State Solar Power South LLC, Bill Narvaez, Transmission Services, Jaime Scarff, Project Development, NextEra Energy Resources LLC, and

Federal, state and local leaders in September 2014 joined executives from NextEra Energy Resources, Southern California Edison and First Solar (Nasdaq: FSLR) to break ground on the Silver State South Solar Project. A subsidiary of NextEra Energy Resources will own and operate the project. All of the power from Silver State South will be provided to Southern California Edison under a long-term contract.

Also, FERC on Sept. 15 accepted an application from Silver State Solar Power South for authorization to make market-based sales of energy, capacity and certain ancillary services under a market-based rate tariff. Silver State is an indirect subsidiary of NextEra Energy Resources, which is part of Florida-based NextEra Energy (NYSE: NEE).

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.