Khosrow Moslehi - Academia.edu (original) (raw)

Papers by Khosrow Moslehi

2023 IEEE Power & Energy Society General Meeting (PESGM)

Power Systems Conference and Exposition, PSCE, IEEE, 2004

This work presents a conceptual overview of a distributed autonomous real-time (DART) system for ... more This work presents a conceptual overview of a distributed autonomous real-time (DART) system for the operation of power systems ranging from small interconnections to continental-scale power grids. The conceptual design considers the evolution of the power and information infrastructure over the next decade and addresses the needs of transmission system operations. The architecture is modular and scalable from the viewpoints

les pannes spectaculaires qui ont recemment frappe certaines regions du monde ont jete le discred... more les pannes spectaculaires qui ont recemment frappe certaines regions du monde ont jete le discredit sur fiabilite des reseaux electriques. La facture economique et sociale de ces grands incidents se chiffre chaque annee en milliards de dollars. A l'ere du tout-numerique, les procedes de fabrication dopes par l'informatique et l'electronique de puissance colonisent l'industrie: la part croissante du poste electricite dans le budget energetique total accenture l'enjeu de la fiabilite. Cet article envisage les solutions d'avant-garde qui permettront d'ameliorer cette caracteristique par une surveillance synchronisee et une conduite coordonnee de tout le systeme electrique.

Unit commitment (UC) is an important problem solved on a daily basis within a strict time limit. ... more Unit commitment (UC) is an important problem solved on a daily basis within a strict time limit. While hourly UC problems are currently considered, they may not be flexible enough with the fast-changing demand and the increased penetration of intermittent renewables. Sub-hourly UC is therefore recommended. This, however, will significantly increase problem complexity even under the deterministic setting, and current methods may not be able to obtain good solutions within the time limit. In this paper, deterministic sub-hourly UC is considered, with the innovative exploitation of soft constraints – constraints that do not need to be strictly satisfied, but with predetermined penalty coefficients for their violations. The key idea is the “surrogate optimization” concept that ensures multiplier convergence within “surrogate” Lagrangian relaxation as long as the “surrogate optimality condition” is satisfied without the need to optimally solve the “relaxed problem.” Consequently, subprob...

The deregulated markets and other factors are pushing power systems to their limits accentuating ... more The deregulated markets and other factors are pushing power systems to their limits accentuating the need for more robust control. This paper presents a conceptual overview of a control approach for supporting a self-healing power system based on a distributed autonomous architecture and a set of coordinated closed loop controls. The proposed architecture is modular and scalable from the viewpoints of organizational, geographical and functional aspects and is applicable to systems ranging from small interconnections to continental-scale power grids. The approach calls for autonomous intelligent functional agents distributed throughout the system at various levels of control hierarchy. This paper further defines the framework for the coordination of the closed loop controls and the corresponding analytical tasks. The tasks are grouped into various execution cycles that collectively cover real-time operations of the power grid starting from hour-ahead scheduling of the market and othe...

Power system reliability has been thrust into the limelight by recent blackouts around the world.... more Power system reliability has been thrust into the limelight by recent blackouts around the world. The social and economic costs of these failures can add up to billions of dollars every year. As the digital age prevails, more efficient manufacturing processes, based on computers and power electronics, have come to dominate industry. As the portion of electricity in the total energy consumption continues to grow, the value of power system reliability increases. This article discusses a vision for state-of-the-art solutions to improve power system reliability through improved monitoring and control.

IEEE Transactions on Power Apparatus and Systems, 1985

2006 IEEE Power Engineering Society General Meeting, 2006

... Khosrow Moslehi, AB Ranjit Kumar, Peter Hirsch T ... ACKNOWLEDGMENT The authors gratefully ac... more ... Khosrow Moslehi, AB Ranjit Kumar, Peter Hirsch T ... ACKNOWLEDGMENT The authors gratefully acknowledge the guidance and support from Mr. Don Von Dollen and constructive discussions with Dr. Anjan Bose (WSU), Ms. Lisa Beard, Mr. Ian Grant, Mr. Doug Bailey and Mr ...

2010 Innovative Smart Grid Technologies (ISGT), 2010

IEEE Transactions on Smart Grid, 2010

IEEE Transactions on Power Systems, 1991

... Note that in each of the cogeneration plants all turbine-generators share the same common hea... more ... Note that in each of the cogeneration plants all turbine-generators share the same common header. ... In these runs, based on normal operating practices, the tank levels are fixed. There are 11turbine-generators and 19 boilers in the 4 cogeneration plants of the test system. ...

ece.cmu.edu

... as automatically switchable capacitors or adding new remote feedback capabilities to automati... more ... as automatically switchable capacitors or adding new remote feedback capabilities to automatic voltage regulators ... on: Selection of financiall from the higher reliability of the self-healing grid Appropriate ... using the prices: 15k/PMU,15k/PMU, 15k/PMU,22.5k/Concentrator, 10k/Routerand10k/Router and 10k/Routerand7.5k ...

Proceedings of the IEEE, 2005

In this paper, we review the functions and architectures of control centers: their past, present,... more In this paper, we review the functions and architectures of control centers: their past, present, and likely future. The evolving changes in power system operational needs require a distributed control center that is decentralized, integrated, flexible, and open. Present-day control centers are moving in that direction with varying degrees of success. The technologies employed in today's control centers to enable them to be distributed are briefly reviewed. With the rise of the Internet age, the trend in information and communication technologies is moving toward Grid computing and Web services, or Grid services. A Grid service-based future control center is stipulated.

This paper discusses a modern market management system architecture that was developed from the g... more This paper discusses a modern market management system architecture that was developed from the ground up with a view to being open, service oriented, standards based, and using commercially available components wherever possible. The design principles that were used in developing this modern MMS system and experiences gained from many years of commercial operation around the world. The resulting market management system (MMS) became the very first integrated web based multi-tiered system that supported both market participant transaction processing as well as the execution of advanced market scheduling applications such as security constrained unit commitment (SCUC). This modern MMS embraces standards such as XML, JMS, and Web services. It has the native features necessary to provide a meaningful service oriented platform, readily adopt new technological innovations and standards, and conform to directions set by the electric energy industry.

IEEE Transactions on Power Systems

IEEE/CAA Journal of Automatica Sinica

Grid integration of wind power is essential to reduce fossil fuel usage but challenging in view o... more Grid integration of wind power is essential to reduce fossil fuel usage but challenging in view of the intermittent nature of wind. Recently, we developed a hybrid Markovian and interval approach for the unit commitment and economic dispatch problem where power generation of conventional units is linked to local wind states to dampen the effects of wind uncertainties. Also, to reduce complexity, extreme and expected states are considered as interval modeling. Although this approach is effective, the fact that major wind farms are often located in remote locations and not accompanied by conventional units leads to conservative results. Furthermore, weights of extreme and expected states in the objective function are difficult to tune, resulting in significant differences between optimization and simulation costs. In this paper, each remote wind farm is paired with a conventional unit to dampen the effects of wind uncertainties without using expensive utility-scaled battery storage, and extra constraints are innovatively established to model pairing. Additionally, proper weights are derived through a novel quadratic fit of cost functions. The problem is solved by using a creative integration of our recent surrogate Lagrangian relaxation and branch-and-cut. Results demonstrate modeling accuracy, computational efficiency, and significant reduction of conservativeness of the previous approach.

International Journal of Electrical Power & Energy Systems

The reliability of a bulk power system is defined as the probability of the set of states for whi... more The reliability of a bulk power system is defined as the probability of the set of states for which the DC load flow is satisfied with a particular demand and there is no line overload. A direct method to find such a set of worldng states, which does not require the solution of a load flow, is proposed. The method involves (i} replacing two sets, one defined by the constraints on line flows and the other by the constraints on phase angles, by two families of hyperboxes; and (ii) identifying the states for which there occur points in a pair of hyperboxes, one from each family, that satisfy the flow-angle relations. The theoretical foundation of the method is presented.