6.2 : Electricity Generation, Transmission, and Distribution
| 6.2.9 |
2009 Peak Load
and Capacity Margin, Summer and Winter by NERC Region (MW) |
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Summer (1) |
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Winter (2) |
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| NERC Region |
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Peak Load |
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Capacity Margin |
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Peak Load |
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Capacity Margin |
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| TRE |
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63,518 |
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16.7% |
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56,191 |
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19.1% |
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| FRCC |
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46,550 |
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6.0% |
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53,022 |
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2.0% |
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| MRO (U.S.) |
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37,963 |
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24.6% |
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35,351 |
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26.8% |
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| NPCC (U.S.) |
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55,944 |
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29.1% |
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44,864 |
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43.2% |
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| RFC |
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161,241 |
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25.2% |
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143,827 |
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33.3% |
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| SERC |
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191,032 |
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24.6% |
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193,135 |
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26.2% |
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| SPP |
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41,465 |
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16.4% |
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32,863 |
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34.6% |
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| WECC |
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128,245 |
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19.4% |
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109,565 |
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29.6% |
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| U.S. TOTAL |
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725,958 |
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22.2% |
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668,818 |
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28.5% |
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| Note(s): |
1)
Summer Demand includes the months of June, July, August, and September. 2)
Winter Demand includes December of the previous year and January-March of the
current year. 3) Capacity Margin is the amount of unused available capability
of an electric power system at peak load as a percentage of net capacity
resources. Net Capacity Resources: Utility- and IPP-owned generating
capacity that is existing or in various stages of planning or construction,
less inoperable capacity, plus planned capacity purchases from other
resources, less planned capacity sales. |
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