Parameterisation effect on the behaviour of a head-dependent hydro chain using a nonlinear model

• Type: Article in International Scientific Journal
• Date: 2006

Authors

Catalao, JPS (Author) Other; Mariano, SJPS (Author) Other; Mendes, VMF (Author) Other; Ferreira, LAFM (Author) Other

Journal

Title: Electric Power Systems Research

Vol. 76 No. 5

Pages: 404-412

ISSN: 0378-7796

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 52 Citations

Scopus - 63 Citations

Other information

Authenticus ID: P-004-MD0

DOI: 10.1016/j.epsr.2005.09.002

Abstract (EN): This paper is on the problem of short-term hydro scheduling (STHS), particularly concerning a head-dependent hydro chain. We use a method based on nonlinear programming (NLP), namely quadratic programming, to consider hydroelectric power generation a function of water discharge and of the head. The method has been applied successfully to solve a test case based on a realistic cascaded hydro system with a negligible computational time requirement and is also applied to show that the role played by reservoirs in the hydro chain do not depend only on their relative position. As a new contribution to earlier studies, which presented reservoir operation rules mainly for medium and long-term planning procedures, we show that the physical data defining hydro chain parameters used in the nonlinear model have an effect on the STHS, implying different optimal storage trajectories for the reservoirs accordingly not only with their position in the hydro chain but also with the new parameterisation defining the data for the hydro system. Moreover, considering head dependency in the hydroelectric power generation, usually neglected for hydro plants with a large storage capacity, provides a better short-term management of the conversion of the potential energy available in the reservoirs into electric energy, which represents a major advantage for the hydroelectric utilities in a competitive electricity market.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9