Published Resources Details
Journal Article
- Title
- The cost of power and energy consumed in electrical losses and auxiliary equipment in an electricity supply system. (and Discussion)
- In
- Electrical and Mechanical Engineering Transactions
- Imprint
- vol. 2, Institution of Engineers Australia, May 1960, pp. 21-
- Abstract
The most economical design of an electricity supply system is achieved by a proper balance between financial and running costs. A very important item of running cost is incurred by the power and energy consumed in system losses and by auxiliary equipment.
These costs are due to incremental changes in system maximum demand, requiring the earlier installation of new generating plant, and from additional energy generation for which the less efficient machines must usually be brought into service at higher incremental generation cost. However,
the new plant, when installed, would be operated so as to effect generation economies.
The cost of losses will change from month to month and from year to year, and they must be integrated over a future period comparable with the life of the plant for which the losses are being evaluated. Thus, in any year, the cost of supply for losses and auxiliaries will consist of three components: -
(a) The incremental cost of energy loss;
(b) The annual cost of "loss plant" calculated· on the basis of the size and cost of generating plant currently being installed;
(c) The saving due to the operation of the "loss plant", which will usually consist of new base load plant of low generating cost and will thus effect a significant saving by off-loading high cost generating plant.
The paper discusses the principles upon which the cost of losses may be calculated for a thermal, a hydro and a combined hydro-thermal electricity system, and a numerical example is worked out for a simplified all-thermal and a combined hydro-thermal generating system, taking account
of transmission costs.