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As the demand for energy, both in the form of electricity and transportation fuel, increase around the world, a renewed focus on converting to a hydrogen economy has emerged. Recent advancements in hydrogen technologies and renewable energy applications show the promise of converting to a hydrogen-based economy should become economically feasible in the near- to mid-term. As the shift from a fossil...
Distributed hydrogen-electric systems produce hydrogen through the electrolysis of water for local distribution. Economic analysis of these systems involves the consideration of operating profit and capital cost. Current methods of design do not incorporate both of these quantities into the design objective. This work presents a method of integrating the capital cost and the operating profit into...
A doubly fed induction generator is under study for application with a wind turbine. The operation of the doubly fed induction generator (DFIG) under different disturbances namely, response to gradual increase or decrease in wind speeds, sudden change of wind speeds like wind gust and different fault scenarios near and farther to the wind turbine are demonstrated in this paper using the wind model...
Steady state analysis cannot provide the details of how system evolves in cascading failure. Dynamic response of generator plays an important role in power system operation and blackout events. In this paper, classical generator and detail generator models are integrated into system model for cascading dynamic simulations.. The cascading scenarios are compared using both steady state and dynamic simulations...
Subsection 1221(a) of the Energy Policy Act of 2005 calls for a study to determine national interest electric transmission corridors. These corridors are defined as "any geographic area experiencing electric transmission capacity constraints or congestion that adversely affects consumers." This paper presents a method to define a "direct flow" between two hubs using the power transfer...
The author presents a commentary on traditionally accepted power concepts in classical electric power engineering. A revision of traditional terminology is proposed.
In this paper, an adaptive controller for static synchronous compensator (STATCOM) is developed to damp oscillations and enhance the stability of power systems. The adaptive controller consists of an on-line identified system model and a pole-shift (PS) feedback controller. Adaptive linear element neuron (ADALINE) is used for on-line model identification to obtain a dynamic equivalent model of the...
The main idea behind the concept, proposed in the paper, is the opportunity to make control systems with increased capabilities by synergetic fusion of the domain-specific knowledge and the methodologies from control theory and artificial intelligence. The particular approach considered combines Control Lyapunov Functions (CLF), a constructive control technique, and Reinforcement Learning (RL) in...
A method for real time monitoring of overhead transmission line sags has been proposed. Mechanical state estimation is used to determine the sag value of each span of the transmission line using real time data. Use of separate tension sensors for critical spans enhances the sag estimation process. The estimated sag values can be used to calculate the clearance values to check for compliance with the...
US is the largest consumer and importer of energy. The average cents for coal, natural gas and petroleum for the power plants in the US are 136.1, 596.1 and 429.4 cents per MMBtu, respectively. Wyoming alone produced 35.6% of total coal in the US and it also has large and increasing natural gas reserves. Both the Western and the Eastern US states pay high prices for electric energy, compared to Wyoming...
The following topics are dealt with: distribution systems; electric machine drives; power markets; power electronics; power quality; power system analysis computing; power system controls; power system education; power system state estimation; power system protection; power system security; distributed generation; renewable energy; transient stability; power system measurement; power line insulators;...
The demand of electricity is increasing day by day. For economic emancipation and in order to meet the Millennium Development Goals, the electricity growth that is generating more electricity, building more transmission/ distribution capacity, bringing more area/ population under electricity coverage and ensuring more efficient management of these are the essential issues. According to the power sector...
Transmission expansion planning (TEP) has faced a significant change since the deregulation of power systems. It becomes even more complicated due to the conflicting objectives and uncertainties which have been exposed by the power industry restructuring. In this paper, a value-based transmission expansion planning algorithm is proposed. The algorithm makes use of the probability density functions...
In this paper we model and analyze the dependence of electricity market outcomes on the market structures and rules. Market attributes such as electricity prices and their volatility, profits and revenues by the market participants and system cost are assessed. Of particular concerns are the effects of market structures on the long-term generation investments needed to meet long-term uncertain demand...
A game-theoretic approach to study the strategic interaction between transmission expansion planning (TEP) and generation expansion planning (GEP) in a competitive electricity market is proposed. The proposed algorithm consists of three levels of optimization to determine a Nash equilibrium such that a dominant strategy can be found out in an expansion planning game.
Protection system hidden failures have been recognized as a contributing factor to power system cascading outages. However, in the current bulk power system reliability assessment practice, protection systems are generally assumed to be perfect, and the effects of hidden failures in protection systems are not taken into account. In this paper, the impact of protection system hidden failures on bulk...
This paper proposes a statistical distribution of blackouts for power systems through the employment of statistical theory. Two groups of factors involved in the cascading events leading to blackouts are explored and explained. The mechanism of blackouts is proposed based on these two factors so that the statistical law of blackouts can be derived by using statistical and probability theory. The theoretical...
Placing a dollar value on electric service reliability causing the disruption of critical social services and the inconveniences to businesses and individuals is nothing new to the electric power industry. The value the customers place on electric service reliability has been studied by utilities and others. This paper provides an overview and reviews the findings of a few such studies and compares...
Batteries commonly cater to the power flows and load leveling in hybrid fuel cell vehicles especially during startup and acceleration. Power provided by the energy storage unit (ESU) need not be constant but can be variable according to the instantaneous power and energy requirement of the vehicle. This paper investigates the design methodology for a combined ultracapacitor and a battery ESU. The...
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