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FCNStabPAP - Conference Paper r FOUR CORNERS PROJECT...

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Conference Paper FOUR CORNERS PROJECT STABILIM STUDIES R. H. Hartley Senior Member IEEE Prrizona Public Service Co. Phoenix, Arizona. Paper No. 68 8 708 - RJR L. M. Wheeler Senior Member IEE Southern Calif. Edison Co . hs Angeles, Calif. r/ R. G. Fanner Senior Menber Arizona Arizona. M. H. Kent Member IEEE California Edison bs Angeles, A paper recumended by the Wer Generation Cumittee and the Pawer System Engineering Caranittee of lEEE Power Group for presenta- tion at 1968 ASTIE/IEEE Joint Power Generation Confemce, San F'ran- cisco, Calif., Septenber 15-19, 1968. Manuscript suhitted July 1, 1968; made available for printing July 24, 1968. Price: $1.00 - All Rights Reserved by (75t at meeting) The Institute of Electrical and Electronics Engineers, Inc. . (150 per copy additional if . 345 East 47th Street first class mailing desired) New York, N. Y. 10017 (266 per copy additional if ' air mail is desired) Litho in USA
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FOUR CORNERS PROJECT STABILITY STUDIES C' R. G. Farmer R. H. Hartley Arizona Public Service Company Phoenix, Arizona ABSTRACT Four Corners Project stability studies em- ployed two types of digital computer programs. A program with the classical representation for generators and loads was used to establish the preliminary system requirements. A program with more accurate representation was used to make detailed studies. Braking resistor, gener- ator dropping, fast valving, fast load runback, and combinations of these were studied as aids to system stability. INTRODUCTION The Four Corners Project is a further de- velopment in coal-fired steam generation in the Southwest. The present project consists of two 755-MW (nameplate) generators in the Northwest of New Mexico near the boundary intersections of the four states of Colorado, Utah, New Mexico, and Arizona. The maximum capability of each new unit is 795 MW. The two new units are owned on a joint basis by six participants with the following shares: . Arizona Public Service Co. 5 239 MW El Paso Electric Company 7 111 Public Service Co. of N. Mex. 13 207 Salt River Project 10 159 Southern California Edison Co. 48 763 Tucson Gas & Electric Co. - 11 1 100% ~MW The two units are an addition to the existing Arizona Public Service Company installation at Four Corners of three generators having a com- bined nameplate capacity of 580 MW. The first new unit is scheduled for the spring of 1969 and the second unit for the spring of 1970. The Four Corners Project is the first coal- fired generation in which a southern California utility has participated. The plant is over 600 miles from the Los Angeles load center, and as such, it has led to a significant expansion in 500 kV transmission facilities in the area. Fea- sibility economics have dictated that plant output to California. 763 MW, be carried on a single 500 kV line for a distance of approximately 400 miles. With a projected 9,000-10, 000 MW sys- tem in 1969-70, it was anticipated that 750 MW generators would have been the next wit size be- '*yond the 500 MW machines recently placed in service in the Los Angeles basin. Thus, the single 500 kV line, with its relatively low esti- mated outage rate compared to the generators,
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FCNStabPAP - Conference Paper r FOUR CORNERS PROJECT...

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