IEEE Power & Energy Magazine - July/August 2015 - 92

different for different generation mixes
and should include all local factors. In
his discussion of this paper, C.W. Watchorn noted: "The level of service reliability of a loss of load expectation of
in the order of the average rate of one
day in ten years in [sic] both reasonable
and adequate. The discusser has already so recommended or indicated on
several occasions," (Watchorn quoted
three of his papers [references 14, 22,
and 25] in this statement as if the issue had been fully discussed in these
papers. In fact, he did recommend or
indicate the criterion in these papers
but did not provide any information on
how or why this value was chosen).
24.
"The Relation of Thermal Plant
Design to Reserve Capacity Requirements," M. J. Steinberg, Electrical Engineering, vol. 69, January
1950, pp. 64-7; Also Elect. World,

vol. 133, January 2, 1950, pp. 58-
60; Also Power Generation, vol.
54, February 1950, pp. 76-9.
Reference 24, [1950] by M.J. Steinberg (Consolidated Edison Company
of New York), used a criterion of one
day in seven years as an example but
provided no justification.
25. "Elements of System Capacity Requirements," C.W. Watchorn, AIEE
Trans., vol. 70, Pt. 11, 1951, pp.
1163-85.
Reference 25, [1951] by C.W. Watchorn, noted the use of a one day in ten
years LOLP criterion that included all
the factors that affect capacity requirements but in a brief statement without
additional justification.
27. "Determination of Generator Stand--
by Reserve Requirements," H. T.
Strandrud, AIEE Trans., vol. 70, Pt.
I, 1951, pp. 179-88.

Reference 27, [1951] by H.T. Strandrud (Bonneville Power Administration), used an LOLP of one day in
14.6 years in his example and indicated that the reliability level should
be decided for each system by considering such factors as the cost of reserves and the possible consequences
of dropping load.
34. "Evaluation of Unit Capacity Additions," M.J. Steinberg and V.M.
Cook, AIEE Trans., (Power Apparatus and Systems), vol. 75, Pt. III,
April 1956, pp. 169-79.
Reference 34, [1956] by M.J. Steinberg and V.M. Cook (Consolidated Edison Company of New York), uses a one
day in seven years criterion for the examples shown in the paper. It was stated
as being based on judgment and that it
generally conforms with the views of
other companies employing this method.

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Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - July/August 2015