Primary Electrical Distribution System Analysis

Transcription

1 Primary Electrical Ditribution Sytem Analyi Technical Report for the 2011 Campu Mater Plan THE UNIVERSITY OF NORTH CAROLINA AT PEMBROKE 5624 Executive Center Drive Suite 200 Charlotte, North Carolina N.C. Licene F-0474 Project No June /27/11

2 Table of Content Executive Summary page 1 Detailed Analyi Exiting Primary Electrical Sytem page 3 Future Electrical Ditribution Plan page 4 Summary of Projected Future Load page 5 Graph of Electrical Sytem Load Projection page 6 Appendix Detailed Electrical Load Projection Ditribution Sytem Load Hitory Appendix A-1 Ditribution Sytem Load Hitory Allocation Appendix A-2 Projected Electrical Demand Load Appendix A-4 Campu Map Exiting Primary Electrical Ditribution Sytem Map Appendix B-1 Mater Plan - Electrical Map Appendix B-2 Table of Content

3 EXECUTIVE SUMMARY Exiting Primary Electrical Sytem The exiting primary electrical ditribution ytem conit of a ingle kv, 3-phae delivery from Progre Energy. The power then leave the ubtation to a network of underground circuit that erve mot of the campu facilitie. There are ome facilitie on campu that are erved from Progre Energy. The campu electrical ytem had major upgrade in 2005 and 2009 and i in good condition with the exception of four (4) 15 kv pad mounted witche and five (5) pad mounted tranformer. Future Electrical Ditribution Plan The maximum recorded electrical demand load wa in September of 2010 of 5,011 kw peak which i 44% of the capacity of the main campu ditribution witchgear. The future electrical load projection are baed on the 2011 Campu Mater Plan. New load will be added to the campu ditribution ytem when the propoed future building are placed into ervice. In addition, ome of the facilitie that are currently erved from eparate Progre Energy meter can be witched to the UNC Pembroke campu electrical ditribution ytem to ave operating energy cot. In order to erve the new projected and tranferred load, additional electrical ditribution equipment will be required at the ubtation. Thi ubtation equipment i needed to upport more campu circuit in the future. Additional underground circuit will be required along with new 15 kv pad mounted witche in trategic area of the campu. See Appendix B for the propoed ytem addition. The main Univerity owned main witchgear ha adequate capacity to provide power for the planned campu expanion including the tranfer of ome exiting load that are United Engineering Group, Inc. Page 1

4 currently erved from Progre Energy. With the current plan the main witchgear i projected to be at 94% capacity in the future with the load projected. The main campu electrical infratructure i in good condition with the exception of the few witche and tranformer that were identified for replacement. The Univerity ha taken good tep to put thi reliable and afe ytem in place. Main UNC Pembroke Subtation and Switchgear United Engineering Group, Inc. Page 2

5 DETAILED ANALYSIS Exiting Campu Ditribution Sytem The exiting primary electrical ditribution ytem conit of a ingle kv, 3-phae delivery from Progre Energy. The Univerity owned ubtation equipment adjacent to the Progre Energy equipment i pad mounted fued witchgear rated at 600 amp operating at kv, giving the ubtation a capacity of 12,959 kva. The campu witchgear i compried of four (4) fued ditribution bay with 200 amp fue erving underground circuit for the campu. See the Appendix for a campu map howing the circuit. The witchgear ha proviion to add two (2) future fued ditribution bay. The main witchgear i manufactured by S&C and wa intalled in The main kv witchgear feed a erie of 15 kv rated pad mounted fued witche via ingle conductor 15 kv cable that are intalled underground concrete encaed ductbank. The pad mounted witche intern erve oil filled pad mounted tranformer near each of the building on campu. The econdary voltage of the tranformer are mixed between 208 volt, 3-phae; 480 volt, 3-phae and 240 volt, 1-phae. The 15 kv underground cable were intalled in 2005 and There are five (5) tranformer that were identified for replacement: School of Buine, North Reidence Hall, Belk Reidence Hall, Wet Reidence Hall and Jacob Hall. There are twenty-three (23) pad mounted witche rated at 15 kv located throughout the campu. Many of the pad mounted witche were replaced or repaired in 2005 and There are four (4) witche that were intalled in 1973 that are at their end of life, in poor condition and need to be replaced. S-7 D.F. Lowery S&C Model PMH-13 S-9 Livermore Library S&C Model PMH-9 S-12 Wet Reidence Hall S&C Model PMH-6 S-14 Given Performing Art S&C Model PMH-6 United Engineering Group, Inc. Page 3

6 Future Electrical Ditribution Plan The future electrical load projection are baed on the Campu Mater Plan a preented within thi report and outlined in the table below. The projection are baed on the campu hitorical data from Progre Energy. The maximum recorded electrical demand load wa in September of 2010: Peak kw Peak kvar kva Amp PF 5,011 2,704 5, *Main Subtation Switchgear Rating = 600 Amp => 44% of capacity at max load With the projected future load, there will need to be two fued witch bay added to the witch gear line up at ome time baed on the chedule of contruction. Alo new underground circuit will be required to upport the future building. See the Appendix B for the propoed circuit location a hown on the campu map. With the new building and load tranfer, new 15 kv pad mounted witche will be required to erve the tranformer for the repective facilitie. Propoed future witche are indicated on the campu map included in the Appendix B. Where facilitie are tranferred from Progre Energy to the campu ditribution ytem new tranformer may be required or purchaed from Progre Energy. The main Univerity owned witchgear ha adequate capacity to provide power for the planned campu expanion including the tranfer of ome exiting load that are currently erved from Progre Energy. With the current plan the main witchgear i projected to be at 94% capacity with the planned contruction and tranfer of the propoed Progre Energy Load. The main campu electrical infratructure i in good condition with the exception of the few witche and tranformer that were identified for replacement. The Univerity ha taken good tep to put thi reliable and afe ytem in place. United Engineering Group, Inc. Page 4

7 Summary of Projected Future Load Projected Electrical Demand for kv Medium Voltage Ditribution Sytem Exiting Demand Bae Load (kva) = 5,694 5,011 kw * kv kva kva kva * Amp Future Facility Bae Load Added Load Total Load Total Load Under Contruction 5,694 1,275 6, Info Common 6, , GPAC Lobby Addition 7, , Viitor' Center 7, , Buine School 7, , Reidence Hall 8, , Academic A 8, , Academic B 8, , Academic C 9, , Future Houing 9, , Tranfer Belk Athletic to Campu Grid 10, , Tranfer Pinchback from Prog Energy 10, , Tranfer Univ Village to Campu Grid 10, , Tranfer Univ Courtyard to Campu Grid 11, , Subtation Capacity 12, United Engineering Group, Inc. Page 5

8 *See Appendix A for Load VA per quare foot aumption United Engineering Group, Inc. Page 6

9 APPENDIX A DETAILED ELECTRICAL LOAD PROJECTIONS UNC Pembroke Bulk Electrical Load Projection kv Medium Voltage Ditribution Sytem Load Hitory Building * KW Watt per KVA SF Demand SF Demand Exiting Total Sytem Load 1,115,921 5, ,694 (le building erved from Progre Energy) * Highet Progre Energy billing demand September 2010 Peak Peak KW KVAR KVA PF Sep ,011 2,704 5, Projected Future Campu Load Exiting Demand + 20% Total * Total Projected Demand Load Watt / SF Watt / SF Watt / SF VA / SF = Power Factor * United Engineering Group, Inc. Appendix A-1

10 12.47 kv Medium Voltage Ditribution Sytem Load Hitory Allocation Bldg No. Name Size % Contribution Electrical Load Allocation (note 3) kva Load 001 OLD MAIN 35, % 35, MOORE HALL 24, % 24, MUSIC ANNEX 2, % 2, LOCKLEAR 21, % 21, LIVERMORE LIBRARY 52, % 52, OXENDINE SCIENCE BLD 92, % 92, NURSING 3, % 3, CHANCELLORS RES 6,418 75% 4, GUEST HOUSE % WEST HALL 39, % 39, D F LOWRY 20, % 20, WELLONS HALL 18, % 18, JACOBS HALL 24, % 24, STUDENT HEALTH SVCS 5, % 5, BUSINESS ADMIN 35, % 35, BELK HALL 39, % 39, NORTH HALL 39, % 39, ENGLISH E. JONES BLD 125, % 125, GIVENS PERF ARTS CTR 43, % 43, EDUCATION BUILDING 33, % 33, DIAL HUMANITIES 31, % 31, JAMES CHAVIS CENTER 69, % 69, LUMBEE HALL 49, % 49, PINE HALL 82, % 82, WEST OFFICE BLDG 1,680 0% PINCBECK MAINT. 67,264 0% REGIONAL CENTER 11, % 11, BIOTECH ADDITION 4, % 4, UNIV. VILLAGE I 21,555 0% UNIV. VILLAGE II 21,555 0% UNIV. VILLAGE III 21,555 0% 0 0 United Engineering Group, Inc. Appendix A-2

11 12.47 kv Medium Voltage Ditribution Sytem Load Hitory Allocation (continued) 055 UNIV VILLAGE IV 21,555 0% UNIV. VILLAGE V 21,555 0% UNIV VILLAGE COMMONS 5,000 0% SRMC 7, % 7, INTERNATIONAL HOUSE 2,070 0% INTERNATIONAL APT 880 0% SIRIUS 1,904 0% MIMOSA 1,904 0% WELTON LOWRY LEASE 1,875 0% AUXILARY SERVICES 48, % 48, SAMPSON CLASSROOM 30, % 30, CATON FIELD HOUSE 27,000 0% OAK RESIDENCE HALL 89, % 89, MAGNOLIA HOUSE 2,201 0% CHAVIS ANNEX 17, % 17, CARTER HALL 11,961 0% FOOTBALL PRESSBOX 3,216 0% DOGWOOD OFFICE BLDG 2,300 0% MAX LOWRY LEASE 1,600 0% CYPRESS HALL (note 2) 122,775 5% 6, ALLIED HEALTH (note 2) 87,500 7% 6, ,554,346 1,115,921 5,694 kva Load /SF = W/f VA/f kv Note: 1) 0% contribution indicate that load i not on campu ytem and i erved by Progre Energy 2) Building under contruction and power utilization i for contruction 3) Building area allocation that i allocated for electrical load on campu grid United Engineering Group, Inc. Appendix A-3

12 Projected Electrical Demand for kv Medium Voltage Ditribution Sytem VA / SF kva SF Demand Demand Under Contruction Cypre Hall 122, le Cypre contruction load -6 Allied Health 87, le Allied Health contruction load -6 1,275 Info Common 150, Demolih Wellon Reidence Hall -95 Demolih Jacob Reidence Hall GPAC Lobby Addition 15, Viitor' Center 25, Buine School 60, Reidence Hall 66, Demolih Wet Reidence Hall Academic A 71, Academic B 89, Academic C 54, Future Houing 44, United Engineering Group, Inc. Appendix A-4

13 Projected Electrical Demand for kv Medium Voltage Ditribution Sytem (continued) Tranfer Belk Athletic to Campu Grid Caton Field Houe 27, Football Prebox G.P. Johnon Stadium Aume operation & Lighting i non coincident with peak Aume operation & Lighting i non coincident with peak Tranfer Pinchbeck to Campu Grid Pinchbeck Maintenance Complex 67, Tranfer Univ Village to Campu Grid UNIV. VILLAGE I 21, UNIV. VILLAGE II 21, UNIV. VILLAGE III 21, UNIV VILLAGE IV 21, UNIV. VILLAGE V 21, UNIV VILLAGE COMMONS 5, Tranfer Univ Courtyard to Campu Grid Univerity Courtyard Apartment 150, (etimated area) TOTAL FUTURE PROJECTION 1,143,214 SF 6,530 kva kv United Engineering Group, Inc. Appendix A-5

14 UNCP Primary Electrical Ditribution 12,470 Volt Sytem Exiting Primary Electrical Circuit Circuit 4 Circuit 3 Progre Energy Subtation Circuit 2 Circuit 1 United Engineering Group, Inc. Appendix B-1

15 Mater Plan - Electrical New 15kV Switch, Typ. In Contruction: A. Cypre Hall 122,775 gf B. Allied Health 87,500 gf Future: 1. Info Common 2. GPAC Lobby Addition 3. Viitor Center 4. New Buine School 5. Future Reidence Hall 6. Long term Academic A 7. Long term Academic B 8. Long term Academic C 9. Future Houing Extend Circuit d New Circuit a b A 5 c B Tranfer from Progre Energy to Campu Sytem: a. Belk Athletic Complex & Playing Field b. Pinchbeck Complex & Playing Field c. Univerity Village Houing d. Univerity Courtyard Houing 1 United Engineering Group, Inc. Appendix B-2