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Union Avenue Substation TCA. NEPOOL Reliability Committee UI-09-TCA-01 June 16, 2009 – Alex Boutsioulis, The United Illuminating Company. Project Need. Addresses 8-10 MW of railroad electric growth in New Haven County, CT.
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Union Avenue Substation TCA NEPOOL Reliability Committee UI-09-TCA-01 June 16, 2009 – Alex Boutsioulis, The United Illuminating Company
Project Need • Addresses 8-10 MW of railroad electric growth in New Haven County, CT. • Additional 340 electric multiple –unit (MU) cars – Metro North New Haven Line. • CT DOT purchase of 356 new MU cars. • Introduction of ACELA high speed inter-city train service. • Replacement of gas fired track switch snow melters with electric melters. • Voltage drop along 11 miles of railroad catenary/feeder system (New Haven to Devon) currently marginal; additional load creates an unacceptable increased voltage drop.
Solution • Preferred Solution • New 115/26.4 kV substation constructed at Union Avenue, New Haven, CT. • Reliably meets supply requirements of additional customer load, results in no adverse impact upon the transmission system and is feasible to construct. • Alternative Considered • Interconnect two 115/26.4-kV 15 MVA transformers at an existing UI owned 115-kV substation in greater New Haven area. Railroad load would be supplied via 27-kV distribution infrastructure. • Alternative rejected due to space limitations. Either one or two additional 115/26.4-kV 15 MVA transformers at any existing UI owned New Haven area facility is physically impossible.
Project PTF Details and Cost Estimate • Project PTF Details • One (1) 115-kV gas insulated circuit breaker. • Four (4) 115-kV disconnect switches and associated bus. • Segment existing 8700 underground low pressure fluid filled line into two underground line segments. • Project Estimated Costs • PTF: $10,542,720 • Non-PTF: $1,102,316 • Planned In-Service Date • September 2010