PLANT REQUIREMENTS
Annex
The process of arriving at future plant requirements has
necessitated CLP giving careful and detailed consideration to a
number of factors including plant mix, size of sets, spinning
reserve, capacity reserve, "dual-firing".
Their observations on these factors are presented below but are limited to the more significant points affecting the estimate of plant requirements.
(a) Generation Planning
The object of Generation Planning is to provide the required supply of electricity (via optimum plant mix) at minimum cost. The economic studies must also take
account of the transmission cost associated with the
generation planning programme.
(b) Plant Mix
This name is given to the percentages of different
types of plant available to the system. On the CLP system
there are three types of plant,-oil fired, gas turbines and diesel. In view of the uncertainty associated with
fuel, consideration now needs to be given to such other types of plant as coal fired, dual fired (coal and oil)
and pumped storage. The various types of plant have different fixed costs and different running costs. Plant with high running costs such as gas turbines are used to meet peak demand; and low running cost stations such as high efficiency fossil fuel plant
are kept on base load.
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