Day-night weather-based economic power dispatch

Electrical energy is the key to worldwide economic success. However the methods of producing it are not strictly environmentally friendly. This paper proposes a day-night weather-based approach to minimize the total generation cost subject to environmental constraints without forming any weather model. The well-established renewable energy source, namely wind energy, and the large scale energy storage systems are introduced to meet the hourly emission targets. The proposed day-night weather-based approach has been applied to several sample systems, and the results indicated its suitability for real-time implementations. A comprehensive discussion of the application of the proposed method is provided here with the help of a 69-bus, 11-generator system.

I. Introduction

The MAIN purpose of the optimal power dispatch problems [1]– [3] has so far been confined to minimize the total electricity generation cost of a power system. However, the existing energy production processes [4] are not ecologically clean. Worldwide, coal-fired electric power stations [5] built two decades before generate half of the world's electricity, but emit 80–85% of the NO_x generated by utilities. In order to meet environmental regulations enforced in recent years, emission control has become one of the important operational objectives of power systems. Extensive research [5]–[8] has been focused on different methods for reducing the emission levels of fossil fueled power stations. Though all these methods are realistic and cost effective, the due consideration for weather effects for day-to-day operation of the power systems is not yet given.