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Security constrained dynamic dispatch of real power for thermal groups

Journal Article · · IEEE Trans. Power Syst.; (United States)
DOI:https://doi.org/10.1109/59.192934· OSTI ID:6326004
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This paper presents a dynamic approach to the real power dispatch of thermal units suitable for time periods characterized by high rates of load variation. In these cases dynamic dispatch places its look-ahead capability at the disposal of the system operators, enabling them to predict how the present loading (MW) and its gradient (MW/min) can influence the response rate ability of the units at a future time. In the paper a discrete formulation of the dispatch problem is adopted, with step variations of the loads. Dynamic constraints on the rate of change of the MW output of thermal units are added to the ordinary constraints of the static approach. Besides, costs associated with the act of more or less quickly changing the thermal generation are included in the model. In the solution of the problem a suitably modified version of the Han-Powell algorithm is involved in a ''compact reduced model'' formulation. Furthermore, a sparseness technique, used in the construction and in the updating of the hessian matrix of the Lagrangian function, allows us to solve large scale problems arising from a minute subdivision of the dispatch interval, also in large electrical systems.

Research Organization:
Centro Ricerca di Automatica, ENEL, Cologno Monzese (IT)
OSTI ID:
6326004
Journal Information:
IEEE Trans. Power Syst.; (United States), Journal Name: IEEE Trans. Power Syst.; (United States) Vol. 3:2; ISSN ITPSE
Country of Publication:
United States
Language:
English

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Related Subjects

200300* -- Electric Power Engineering-- Power Transmission & Distribution-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
ALGORITHMS
ARTIFICIAL INTELLIGENCE
COMPUTERIZED CONTROL SYSTEMS
CONTROL SYSTEMS
DYNAMIC LOADS
ENERGY SYSTEMS
FUNCTIONS
LAGRANGIAN FUNCTION
LOAD MANAGEMENT
MANAGEMENT
MATHEMATICAL LOGIC
MATRICES
POWER PLANTS
POWER SYSTEMS
POWER TRANSMISSION
RESPONSE FUNCTIONS
SECURITY
STATIC LOADS
THERMAL POWER PLANTS
VARIATIONS