DUKE POWER CO SERVICE AREA GREENVILLE AND VIRGINIA CHARLOTTE NORTH CAROLINA 50 DUKE POWER COMPANY SERVICE AREA Plant Steam Stations: Tiger Table I-1. Duke Power Company Generating Facilities These old steam plants have a heat rate that averages 10,676 Btu/kWhr. Year shown is first year of operation and does not reflect subsequent improvements, such as installation of gas turbines. Upon completion. A special case, since gas turbine is located outside the DPC district. respectively. The capacity of the system with and without these units is compared with the peak loads forecast by the company for the years 1971 to 1974 in Figure 1-3. Without the Oconee capability, the 1973 generating and purchase resources of the applicant would be about 450 megawatts short of its anticipated load for that year. With Units 1, 2, and 3 in operation the reserve capacity would be about 25%. The amount of reserve capacity that should be provided in a system depends upon the total system capacity, the size and condition of the individual units, and the sharing and transfer arrangements with other utilities. The Duke Power Company was part of the old CARVA pool, which also included the Virginia Electric and Power Company, the Carolina Power and Light Company, and the South Carolina Electric and Gas Company. With the addition of two new members, the Southeastern Power Administration and the South Carolina Public Service Authority, the expanded pool is called the Virginia-Carolinas Reliability Group, a member of the newly organized Virginia-Carolinas Reliability Council. The compounded annual growth rate of this power pool is reported by the Federal Power Commission to be 8.3%. (2) Additions to the installed capacity by members of the CARVA pool will provide a reserve margin of 1,941 megawatts (about 8.8% reserve capacity) if the units are not counted and 4,600 megawatts (20.8% reserve) if the units are included. (The new members are planning additions to the installed capacity of only about 248 megawatts between 1970 and 1973; therefore the reserve margin of the new group will be similar to that of the old CARVA pool.) These planned reserve capacities may be compared with those which have been planned and justified for other areas. The northeastern United States, for example, is working toward an average reserve capacity of 15 to 20%. Reserve generating capacity helps to provide assurance against unexpected outages. In addition to the increased reliability, a further advantage of ample new generating capacity is that cutbacks can be made in the operation of old, less-efficient thermal power stations which consume relatively more fuel per generated kilowatt and thus emit greater amounts of pollutants to the environment. All the steam plants shown in Table I-1 are in operation at the present time even though three are more than 40 years old and four others are more than 30 years old. * * The applicant plans to retire about 79 megawatts in old units in 1973 (possibly the Tiger, Buzzards, Roost, and Greenwood plants) when the Oconee units are completed. THE CAPACITY WITHOUT OCONEE IN THE YEAR 1973 SHOWS A NOTE: The peak load points on the above graph are the (See |