Title: Power plants coordination for economic and environmental load dispatch of thermal power plants with wind generation systems

Authors: Kishor B. Porate; Krishna L. Thakre; Ghanashyam Bodhe

Addresses: Department of Electrical Engineering, Priyadarshini College of Engineering, Near CRPF Campus, Hingna Road, Nagpur-440 019, Maharashtra, India ' Department of Electrical Engineering, Viswesariya National Institute of Technology, South Ambazari Road, Nagpur-440010, Maharashtra, India ' National Environmental Engineering Research Institute, Nehru Marg, Nagpur-440010, Maharashtra, India

Abstract: Economic load dispatch (ELD) and economic emission dispatch (EED) have been applied to obtain generation scheduling of thermal power plants at optimum fuel cost and emissions. Due to limited availability of quality coal, issue of environmental emissions and high prices of coal, installation of renewable energy systems are suggested in power grid. Renewable energy system preferably wind generators are used in co-working with thermal plant which reduces generation cost, coal requirement and environmental emissions. This paper presents Newton-Raphson method to obtain ELD and EED. System simulation and programming is carried out in MATLAB® environment. Analysis has been made on generation cost and for nitrous oxides emissions only due to its harmful effects and its rising tendency with excess air. Price penalty factor is also calculated to determine emission cost. Doubly fed induction generator (DFIG) is suggested as wind energy systems in combination with coal-based thermal plant. Performance results related to generation scheduling, transmission line loading, bus voltages, total cost and environmental emissions are shown for coal-based thermal power plant and with co-generation. The investigation shows that with co-generation, coal-based thermal power plant runs at minimum emissions level which further reflects on the generation economy.

Keywords: economic load dispatch; ELD; economic emission dispatch; EED; environmental emissions; coal based power stations; thermal power plants; doubly fed induction generators; power plant coordination; wind generation systems; wind energy; wind power; renewable energy; power grid; simulation; nitrous oxides; NOx emissions; co-generation; generation scheduling; transmission line loading; bus voltages; total cost.

DOI: 10.1504/IJPEC.2013.054844

International Journal of Power and Energy Conversion, 2013 Vol.4 No.3, pp.251 - 267

Received: 07 Nov 2011
Accepted: 23 Apr 2012

Published online: 31 Mar 2014 *

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