January 2012 Capital Investment - National Grid

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Exhibit ___ (EIOP-19)Page 33 of 6842011 to 2012 Variance:The major reason for the variance in this Plan relates to investment in FY17 which is thelargest spend amount within the period of the Plan and occurs during a year not part ofthe previous Plan. The construction of the Southwest Station amounts to $27.6m of thetotal spending ($46.6m) in FY17. The significant investment in the last year of this Planreflects decisions to defer investments in order to reduce their overall costs.Table II-9Transmission – Reliability Criteria ComplianceProgram Variance ($millions)CIP FY12 FY13 FY14 FY15 FY16 FY17 Total2011 2.9 2.4 1.8 4.4 21.1 - 32.62012 - 0.1 3.4 7.4 20.9 46.6 78.5The Company has recently become aware that there may be a need to advance theSouthwest projects to an even earlier timeframe. In doing so the Company will need toanalyze how it can expedite the projects, and that analysis will identify the change inspend profile for these transmission projects and the impact on the overall Plan. In theevent that acceleration of the investment is needed, the Company will revise the capitalinvestment plan reflected in its next rate case.Other System Capacity & PerformanceThere are currently four separate projects with investment levels greater than $2 millioneach included in the Other System Capacity and Performance program. The largest itemis the Syracuse area re-conductoring program.Syracuse Area Re-ConductoringThis program (CNYPL28, $16.3m) reinforces the transmission system in and around theSyracuse area. These reinforcements are necessary to respond to a system capacityand performance need caused by load growth in the area over the period of timebetween 2010 and 2015. Without this program, the 115kV system will be exposed tothermal overloads during contingency conditions.The program scope includes the following projects:• Re-conductor two separate sections of the Clay–Teall 115kV Line #10. Thesections targeted for re-conductoring are 6.75 miles, and 6.08 miles. This projectis required for compliance with mandatory NERC standards.• Re-conductor 10.24 miles of Clay–Dewitt 115kV Line #3. This project is requiredfor compliance with mandatory NERC standards.• Re-conductor 0.92 miles of the Geres Lock – Solvay 115kV Line #2. This projectis required to conform to relevant planning criteria.•II-1634
Exhibit ___ (EIOP-19)Page 34 of 684Drivers:Studies of the 115kV and 345kV transmission systems were conducted for the Centralregion of central New York, which extends from Elbridge Substation in the West toOneida Station in the East, to determine whether the systems comply with reliabilitystandards. These studies were performed in 2008, and then reconfirmed in 2010, andevaluated the system for existing load levels up to a 15 year forecasted load level.Included within both of these evaluations were testing to comply with NERC TPLStandards, NPCC Regional Reliability Reference Directory #1, NYSRC Reliability Rulesand the Company’s Transmission Planning Guide (TGP 28). These standards requirethe entire transmission system to meet voltage, thermal, and stability criteria.Several reliability criteria issues for the area were discovered under study conditions.Issues include thermal overloads on 115kV circuits in the Central Region.Customer Benefits:Customers will benefit from this program in several ways, including:• Their exposure to service interruptions, some resulting from load shedding, in theevent that certain key contingencies were to occur will be reduced significantly.• Some capability to accommodate new or expanding load will be added to thesystem.2011 to 2012 Variance:The 2011 CIP projections reflect updated understanding of area system needs over2010’s Plan. The program is progressing as expected. Thus there is little variance.Table II-10Transmission – Syracuse Area ReconductoringProgram Variance ($millions)CIP FY12 FY13 FY14 FY15 FY16 FY17 Total2011 0.1 0.2 0.2 2.0 13.0 - 15.52012 - 0.2 0.2 2.0 13.0 .9 16.3D. Asset ConditionAsset Condition expenditures are those investments required to reduce the likelihoodand consequence of the failures of transmission and distribution assets, such asreplacing system elements like overhead lines, underground cable or substationequipment. During the previous ten years, the Company adopted an Asset Managementapproach that relied on a holistic, longer-view assessment of assets and asset systemsto inform capital-investment decisions. As part of this approach, the Company conductedassessments of major asset classes such as circuit breakers or subsets of asset classesII-1735
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January 2012 Capital Investment - National Grid

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