Probabilistic production costing with explicit recognition of unit duty cycle effects /
| Main Author: | |
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| Other Authors: | , , |
| Format: | Thesis Book |
| Language: | English |
| Published: |
1990.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Abstract: | The duty cycle of a cyclic unit in a power system does not only depend on its own characteristics but also on the characteristics of units committed before it, the load cycle shape and the operating reserve policy of the system . The operation of a base-loaded unit is linked to the load cycle. Presently available production costing methods use ad-hoc and implicit procedures for the determination of these unit duty cycles and therefore are not capable of reflecting any changes in the operating policy of the system. This dissertation describes a new probabilistic production costing algorithm which recognizes the stochastic nature of operation of a generating unit and models this probabilistic behaviour with explicit consideration of several important operating characteristics of the system. A new Markov model for the base-loaded units capable of directly linking the operation of such units to the load cycle is developed. The cyclic unit model is capable of explicitly treating hot and cold start-up delays, start-up failures as separate from running failures, unplanned outage postponability, minimum operating and shutdown times and block loading of these units. The duty cycle of a cyclic unit is explicitly related to the unit commitment policy, block dispatch priority order and the operating reserve policy of the system. The base-loaded model is based on a pseudo duty cycle which links the operation of such units to the load cycle shape. Two EPRI synthetic systems are used to test the new algorithm. Results are compared with those obtained from a traditional method and the original method of reference 39, which recognizes the cyclic unit duty cycle explicitly but uses an ad-hoc procedure to model base-loaded units. The results are discussed and the merit and significance of the new method are pointed out. |
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| Item Description: | Typescript (photocopy). Vita. "Major subject: Electrical engineering." |
| Physical Description: | xi, 137 leaves : illustrations ; 29 cm |
| Bibliography: | Includes bibliographical references. |