January 2012 Capital Investment - National Grid

More documents

Recommendations

Info

Exhibit ___ (EIOP-19)Page 21 of 684thermal capacity with respect to the three Rotterdam 230/115kV transformers and theSpier-Rotterdam #1/#2 115kV double circuit. These conditions present a need tosimultaneously relieve 115kV thermal overloads which affect the transmission supply tothe Northeast Region and to add bulk-power transformation capacity.As discussed in the 2009 Asset Condition Report 2 and the Eastern NY ReinforcementProject Report 3 , Global Foundries’ (GF) commitment to build a chip-manufacturing plantat the Luther Forest Technology Campus (LFTC) site results in projected load growthwithin the Northeast Region that will exacerbate transmission system performanceissues.The Company’s ten-year forecast for the area projects a growth rate of just under 1% forloads within all of Eastern NY. However, a forecast specific to the northeast region thatreflects higher residential growth and anticipated ancillary loads based on economicdevelopment following the addition of Global Foundries projects a growth rate ofapproximately 2.5% over the next five years. The Company has phased the programover several years, so that it has the ability to defer, re-phase or eliminate certain loadgrowth dependent elements of the program as discussed above.Customer Benefits:The transmission reinforcement plan will resolve existing thermal and voltage problemsthat are expected to be exacerbated from projected load growth in the Northeast Region.More specifically, the three existing 230/115 kV transformers at Rotterdam and Spier-Rotterdam #1/#2, which are primary components of the transmission supply for theNortheast Region, already exceed their ratings for certain contingency conditions.Without improvements being made to the transmission facilities in this area, thedevelopment of the LFTC could be jeopardized. Load shedding on the order of hundredsof MWs would be necessary to relieve projected overloads without the new Spier-Rotterdam and Eastover Road projects.In addition, the transmission reinforcement program will reduce dependence on localgeneration for reliability of service within the region. Without local generation availableduring the summer periods, the Spier-Rotterdam 115 kV circuits will be exposed tosingle contingency overloads until the local generation is returned to service. This in turncould require load shedding at or near LFTC for relief. This situation will be resolved withthe addition of the new Spier-Rotterdam line, Eastover Road Substation and Mohican-Battenkill reconductoring – the latter projects being part of this program because ofcurrent transmission performance needs rather than future load growth.2011 to 2012 Variance:The primary variance between the 2011 and the 2012 Capital Investment Plans (CIP)results from reduced investment associated with the Eastover Road substation.Additional analysis spurred by feedback from DPS staff examined alternatives to a2 Report on the Condition of Physical Elements of Transmission and Distribution Systems, Case06-M-0878, October 1, 2009, pgs. II-17 to II-18.3 Report to DPS: Eastern NY Reinforcement Project – Associated Bulk Transformation Needsand Solution Assessment, November 3, 2011. The investments shown for Eastover Road in thelatter DPS report included spending prior to FY13 whereas the investments shown in this fiveyear Plan exclude spending prior to FY13.II-422
Exhibit ___ (EIOP-19)Page 22 of 684standard two-transformer bank Eastover Road substation layout. This analysisdetermined that the new Eastover Road substation with a ring bus layout and a single230/115kV bank was still superior to other solutions that did not involve the addition ofEastover Road substation. However, the reduced scale of the initial Eastover Roadsubstation layout allows for initial CAPEX savings while still allowing for expansion of thesubstation to two banks as warranted by future load growth in the area. The latter needis expected to occur beyond the time frame of this five year Plan.Table II-2Transmission – Northeast Region ReinforcementProgram Variance ($millions)CIP FY12 FY13 FY14 FY15 FY16 FY17 Total2011 19.5 50.1 52.1 19.8 5.7 - 147.22012 - 41.9 44.4 24.3 8.6 9.0 128.1Substation Compliance UpgradesThis program relates to the need to upgrade the Clay 115kV (C28705) and Porter 115kV(C28686) substations to meet recently applicable NPCC criteria. The applicability of theNPCC criteria to these two stations has been confirmed by the New York ISO; therefore,investments are required to comply with the relevant NPCC requirements. 4Drivers:In accordance with NPCC criteria adopted in April 2007, testing of major substationsacross New York State was performed by the NYISO. The results indicate that Clay andPorter 115 kV substations as facilities that are required to be brought into compliancewith specific NPCC design, protection and operation requirements.Customer Benefits:In addition to compliance with NPCC and NYSRC requirements, the benefits ofcompleting these projects are reductions in system vulnerability to certain severecontingencies identified in system studies. Customers throughout central New York willbenefit from reduced vulnerability of the transmission system to such contingencies.2011 to 2012 Variance:The scope of work for the Clay 115kV project has become better defined as the projectmoved through preliminary engineering into final design and more accurate estimateswere established.In 2010, the project at Porter was re-phased and broken out into 115 and 230kVportions. A breaker-and-a-half configuration was initially proposed, but further analysisdetermined that a 115kV straight bus design could be utilized by rebuilding in place. A4 This program was discussed in more detail in Appendix 1, Attachment 4 of the April 21, 2009Petition to Defer Electric Transmission & Distribution Investment Costs (Case 07-E-1533).II-523
Page 1 and 2: Niagara Mohawk Power Corporationd/b
Page 3 and 4: Testimony of Electric Infrastructur
Page 5 and 6: Exhibit ___ (EIOP-19)Page 2 of 684T
Page 7 and 8: Exhibit ___ (EIOP-19)Page 4 of 684s
Page 9 and 10: Exhibit ___ (EIOP-19)Page 6 of 684A
Page 11 and 12: Exhibit ___ (EIOP-19)Page 8 of 684M
Page 13 and 14: Exhibit ___ (EIOP-19)Page 10 of 684
Page 23: Exhibit ___ (EIOP-19)Page 20 of 684
Page 75 and 76:
Exhibit ___ (EIOP-19)Page 72 of 684
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Page 139 and 140:
Page 141 and 142:
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
This document has been redacted for
Page 161 and 162:
Page 163 and 164:
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
show all

January 2012 Capital Investment - National Grid

Create successful ePaper yourself

Delete template?

Save as template?