The Experts below are selected from a list of 1464 Experts worldwide ranked by ideXlab platform

Moses Peter Musau - One of the best experts on this subject based on the ideXlab platform.

  • Security and Stability Aspects of Multi Objective Dynamic Economic Dispatch with Renewable Energy and HVDC Transmission Lines
    Journal of Power and Energy Engineering, 2018
    Co-Authors: Moses Peter Musau
    Abstract:

    Renewable sources of energy are being integrated into the power grids due to their economic and environmental merits as compared with the traditional fossil-fuel-fired power generation. However, their significant penetration demands a thorough research in terms of system reliability, that is, security and stability. In this paper, Security Constrained Multi Objective Dynamic Economic Dispatch (SCMODED) problem considering Cubic thermal Cubic Cost Function, wind, solar penetration, Cubic transmission power losses and Cubic emissions Cost Function as objectives is first formulated. Both HVDC and HVAC lines are included in their formulation. Various approaches like probabilistic load flow (PLF), scenario based method, participation factors and Harmony Search algorithm etc. are employed in the solution process. Security and stability effects of renewable energy (RE) penetration are investigated and analyzed. The simulated results reveal that RE penetration leads to reduced Cost and emissions and increased security concerns. Further, there is increased power system instability and hence increased load shedding so as to help the power system attain steady state stability. Inclusion of HVDC lines facilitates rapid and fast control to increase the transient stability limit by the action of the converter ignition angle (CIA) and converter extinction angle (CEA).

  • Multi area multi objective dynamic economic dispatch with renewable energy and emissions
    2016 IEEE International Energy Conference (ENERGYCON), 2016
    Co-Authors: Moses Peter Musau, Nicodemus Abungu Odero, Cyrus Wabuge Wekesa
    Abstract:

    In this paper, multi area multi objective dynamic economic dispatch (MAMODED) with optimal real power dispatch in dynamic areas is considered. More accurate Cubic Cost Function models thermal and emissions Functions. The five-objective MAMODED includes thermal, renewable, tie line losses and emissions plus all the possible constraints. Uncertainties and variability of renewable energy (RE) sources are modelled using scenario based method (SBM). Modified Firefly Algorithm with Levy Flights and Derived Mutation (MFA-LF-DM) which is applied to validate the formulation resulted in better power exchange as compared to optimality condition decomposition (OCD) in terms of Cost and emission reduction.

Sydulu Maheswarapu - One of the best experts on this subject based on the ideXlab platform.

  • an effective non iterative λ logic based algorithm for economic dispatch of generators with Cubic fuel Cost Function
    International Journal of Electrical Power & Energy Systems, 2010
    Co-Authors: Adhinarayanan Theerthamalai, Sydulu Maheswarapu
    Abstract:

    Abstract This paper presents a very fast and effective non-iterative “λ-logic based” algorithm for economic dispatch (ED) with Cubic Cost Function of thermal units. Representation of generator fuel Cost curves by polynomials in real-time economic dispatch is standard practice in the industry and it shows a great influence on the accuracy of the economic dispatch solution. As the proposed approach is a direct or non-iterative method, it does not demand any initial guess values for ED of units for given demand (PD). Many of the existing conventional methods fail to impose p-limits at violating units and find difficult in dealing with Cubic Cost Function that reflect nonlinearity of the actual generator response. The proposed method is very efficient for both small and large size of generating units with Cubic fuel Cost Function in the problem and it remarkably reduces the computation time. The proposed algorithm has been tested successfully on three units, five units and 26 units and results are reported in the paper.

Antonin Monteil - One of the best experts on this subject based on the ideXlab platform.

  • A necessary condition for lower semicontinuity of line energies
    Calculus of Variations and Partial Differential Equations, 2017
    Co-Authors: Pierre Bochard, Antonin Monteil
    Abstract:

    We are interested in some energy Functionals concentrated on the discontinuity lines of divergence-free 2D vector fields valued in the circle $$\mathbb {S}^1$$ S 1 . This kind of energy has been introduced first by Aviles and Giga (A mathematical problem related to the physical theory of liquid crystal configurations, 1987 ). They show in particular that, with the Cubic Cost Function $$f(t)=t^3$$ f ( t ) = t 3 , this energy is lower semicontinuous. In this paper, we construct a counter-example which excludes the lower semicontinuity of line energies for Cost Functions of the form $$t^p$$ t p with $$0

  • A necessary condition for lower semicontinuity of line energies
    2015
    Co-Authors: Pierre Bochard, Antonin Monteil
    Abstract:

    We are interested in some energy Functionals concentrated on the discontinuity lines of divergence-free 2D vector fields valued in the circle $\mathbb{S}^1$. This kind of energy has been introduced first by P. Aviles and Y. Giga in the article "A mathematical problem related to the physical theory of liquid crystal configurations" (1986). They show in particular that, with the Cubic Cost Function $f(t) = t^3$, this energy is lower semicontinuous. In this paper, we construct a counterexample which excludes the lower semicontinuity of line energies for Cost Functions of the form $t^p$ with $0 < p < 1$. We also show that, in this case, the viscosity solution corresponding to a certain convex domain is not a minimizer.

  • A necessary condition for lower semicontinuity of line energies
    arXiv: Analysis of PDEs, 2015
    Co-Authors: Pierre Bochard, Antonin Monteil
    Abstract:

    We are interested in some energy Functionals concentrated on the discontinuity lines of divergence-free 2D vector fields valued in the circle $\mathbb{S}^1$. This kind of energy has been introduced first by P. Aviles and Y. Giga. They show in particular that, with the Cubic Cost Function $f(t)=t^3$, this energy is lower semicontinuous. In this paper, we construct a counter-example which excludes the lower semicontinuity of line energies for Cost Functions of the form $t^p$ with $0

Adhinarayanan Theerthamalai - One of the best experts on this subject based on the ideXlab platform.

  • an effective non iterative λ logic based algorithm for economic dispatch of generators with Cubic fuel Cost Function
    International Journal of Electrical Power & Energy Systems, 2010
    Co-Authors: Adhinarayanan Theerthamalai, Sydulu Maheswarapu
    Abstract:

    Abstract This paper presents a very fast and effective non-iterative “λ-logic based” algorithm for economic dispatch (ED) with Cubic Cost Function of thermal units. Representation of generator fuel Cost curves by polynomials in real-time economic dispatch is standard practice in the industry and it shows a great influence on the accuracy of the economic dispatch solution. As the proposed approach is a direct or non-iterative method, it does not demand any initial guess values for ED of units for given demand (PD). Many of the existing conventional methods fail to impose p-limits at violating units and find difficult in dealing with Cubic Cost Function that reflect nonlinearity of the actual generator response. The proposed method is very efficient for both small and large size of generating units with Cubic fuel Cost Function in the problem and it remarkably reduces the computation time. The proposed algorithm has been tested successfully on three units, five units and 26 units and results are reported in the paper.

Pierre Bochard - One of the best experts on this subject based on the ideXlab platform.

  • A necessary condition for lower semicontinuity of line energies
    Calculus of Variations and Partial Differential Equations, 2017
    Co-Authors: Pierre Bochard, Antonin Monteil
    Abstract:

    We are interested in some energy Functionals concentrated on the discontinuity lines of divergence-free 2D vector fields valued in the circle $$\mathbb {S}^1$$ S 1 . This kind of energy has been introduced first by Aviles and Giga (A mathematical problem related to the physical theory of liquid crystal configurations, 1987 ). They show in particular that, with the Cubic Cost Function $$f(t)=t^3$$ f ( t ) = t 3 , this energy is lower semicontinuous. In this paper, we construct a counter-example which excludes the lower semicontinuity of line energies for Cost Functions of the form $$t^p$$ t p with $$0

  • A necessary condition for lower semicontinuity of line energies
    2015
    Co-Authors: Pierre Bochard, Antonin Monteil
    Abstract:

    We are interested in some energy Functionals concentrated on the discontinuity lines of divergence-free 2D vector fields valued in the circle $\mathbb{S}^1$. This kind of energy has been introduced first by P. Aviles and Y. Giga in the article "A mathematical problem related to the physical theory of liquid crystal configurations" (1986). They show in particular that, with the Cubic Cost Function $f(t) = t^3$, this energy is lower semicontinuous. In this paper, we construct a counterexample which excludes the lower semicontinuity of line energies for Cost Functions of the form $t^p$ with $0 < p < 1$. We also show that, in this case, the viscosity solution corresponding to a certain convex domain is not a minimizer.

  • A necessary condition for lower semicontinuity of line energies
    arXiv: Analysis of PDEs, 2015
    Co-Authors: Pierre Bochard, Antonin Monteil
    Abstract:

    We are interested in some energy Functionals concentrated on the discontinuity lines of divergence-free 2D vector fields valued in the circle $\mathbb{S}^1$. This kind of energy has been introduced first by P. Aviles and Y. Giga. They show in particular that, with the Cubic Cost Function $f(t)=t^3$, this energy is lower semicontinuous. In this paper, we construct a counter-example which excludes the lower semicontinuity of line energies for Cost Functions of the form $t^p$ with $0