168. SHORT-TERM HYDROTHERMAL COORDINATION BASED ON PRIMAL-DUAL INTERIOR POINT METHOD

Borče Postolov; Sofija Nikolova Poceva

doi:10.51466/JEEIT2051023p

Borče Postolov Faculty of Electical Enginnering and Information Technologies ,"Ss. Cyril and Methodius" University in Skopje, P.O. box 574 , 1001 Skopje, Republic of Macedonia
Sofija Nikolova Poceva Faculty of Electical Enginnering and Information Technologies ,"Ss. Cyril and Methodius" University in Skopje, P.O. box 574 , 1001 Skopje, Republic of Macedonia

DOI: https://doi.org/10.51466/JEEIT2051023p

Keywords: primal-dual interior point algorithm, short-term, hydrothermal coordination

Abstract

This paper proposes a Primal-Dual Interior Point (PDIP) algorithm for solving short-term hydrothermal power system (STHTS) scheduling problem considering power losses in transmission system, forecasted wind power and transmission line constraint. A mathematical model for solving the problem of STHTS has been developed and implemented in the MATLAB software package. The PDIP forms Lagrange function by adding an internal (barrier) penalty function, and converting all inequality constraints to equality constraints, and then Newton's iterative method is used to solve the system equations. The main advantages of the PDIP method are the large scale type and the ability to solve optimization problems with sparse matrices. The effectiveness of the proposed PDIP has been previously tested on different hydrothermal power systems and the obtained test results have been compared to those from other methods in the literature. The main purpose of this paper is to highlight the impact of transmission line constraint on the operating costs of the thermal power plants, i.e. that it should be included in the mathematical model of STHTS.