Henry Chao

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Ruth DeSouza

University of Melbourne

Remo Caponi

University of Cologne

Ibrahim Cahit

Near East University

Philip C Hébert

University of Toronto

Rio Fardiyan

Universitas Pamulang

Nikos Mantzakouras

National & Kapodistrian University of Athens

Adnan Khan

Xavier Molinero

Universitat Politecnica de Catalunya

Mohie M . Alqezweeni

Kerbalauniversity

Andrej Dujella

University of Zagreb

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Papers by Henry Chao

Capacity Markets in NYISO & ISO-NE

Power Engineering Society, IEEE General Meeting, 2007

Electricity market demand is increasing by 1.5 - 2.0% per year. With demand rising and older powe... more Electricity market demand is increasing by 1.5 - 2.0% per year. With demand rising and older power plants retiring, the need for power supply in the North Americas, in general, is becoming critical. This is especially true in the Northeast part of the US. While much discussions and regulatory filings have been done, an effective formation of the capacity market is still in the making. A review of the capacity market and resource deliverability in the Northeast, the mechanism of the capacity markets, the pros and cons, and how they are supposedly to work will be discussed.

Resource adequacy assessment considering transmission and generation via market simulations

Febs Letters, 2004

Growth in electricity demand with lack of investment in new transmission facilities has led to th... more Growth in electricity demand with lack of investment in new transmission facilities has led to the formation of load pockets with long congestion hours over transmission bottlenecks. When assessing resource adequacy with reference to the load pockets, one needs to include both generation resources and power delivery systems to capture their impacts on system reliability and market economics at the delivery points. This paper presents a resource adequacy analysis approach to evaluate reliability as well as economic impact in a competitive energy market. Unavailability of generating units and transmission facilities is considered in market simulations to assess the overall adequacy of load-serving ability in a load pocket. Effects of transmission are illustrated through a market simulation analysis of the NYCA system based on publicly available transmission, generation, and demand data.

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Assessment of Quick Start Resource Requirements in Market Operations

In Southwest Connecticut of the New England system, out-of-merit generation is often committed to... more In Southwest Connecticut of the New England system, out-of-merit generation is often committed to provide operational reliability support due to transmission constraints and a lack of local quick-start resources. The resources related to these supplemental commitments are paid an additional amount that is over and above the energy market revenues. A one-year feasibility study was performed to investigate if the GridView model, an engineering and economic simulation program, could be used to identify the amount of generating or demand response resources that would be required to reduce out-of-merit generation commitment. The objective of this exercise was to develop the New England bulk power system model, reflecting all relevant transmission and generation system operating characteristics, and simulate the system to find out whether the program produces reasonable results for use in the regional resource planning effort. This feasibility study would also identify the amount of quick start capacity needed, under assumed competitive market conditions, to improve system operational reliability and market efficiency

Marginal loss calculation in competitive electrical energy markets

International Conference on Electric Utility Deregulation and Restructuring and Power Technologies, 2004

The core of FERC proposed standard market design (SMD) in the US is locational marginal pricing (... more The core of FERC proposed standard market design (SMD) in the US is locational marginal pricing (LMP) for electrical energy by which the energy prices are to be determined based on marginal costs in order to promote economic efficiency. One of the main challenging issues in implementing LMP methodology is the pricing of marginal losses, which requires accurate analysis of

Note on diagonal procedure in analytic hierarchy process

Mathematical and Computer Modelling, 2004

We study the paper of Finan and Hurley published in the International Transactions of Operational... more We study the paper of Finan and Hurley published in the International Transactions of Operational Research. They created a diagonal procedure in which their comparison matrix is rank-order consistent. The purpose of this paper is fourfold. First, we point out their procedure contains questionable results and improve on them. Second, we show that their procedure cannot guarantee that the consistency index is always less than 0.1. Third, we prove that their method preserves the predetermined rank order. Fourth, we offer a simpler procedure to derive the numerical weights. Hence, we suggest that decision-makers still use the comparison matrix of Saaty. Numerical examples are included to illustrate our findings.

Note on group consistency in analytic hierarchy process

European Journal of Operational Research, 2008

We study the paper of Xu [Z. Xu, On consistency of the weighted geometric mean complex judgement ... more We study the paper of Xu [Z. Xu, On consistency of the weighted geometric mean complex judgement matrix in AHP, European Journal of Operational Research 126 (2000) 683–687] for the group consistency in analytic hierarchy process of multicriteria decision-making. The purpose of this note is threefold. First, we point out the questionable results in this paper. Second, for three by three comparison matrices, we provide a patchwork for his method. Third, we constructed a counter example to show that in general his method is wrong. Numerical examples are provided to illustrate our findings. If there are four or more alternatives, then we may advise researchers to ignore his results to avoid questionable estimation of group consistency.

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A demand independent inventory model

Yugoslav Journal of Operations Research, 2013

Note on diagonal procedure in analytic hierarchy process

Mathematical and Computer Modelling, 2004

Note on group consistency in analytic hierarchy process

European Journal of Operational Research, 2008

We study the paper of Xu [Z. Xu, On consistency of the weighted geometric mean complex judgement ... more We study the paper of Xu [Z. Xu, On consistency of the weighted geometric mean complex judgement matrix in AHP, European Journal of Operational Research 126 (2000) 683-687] for the group consistency in analytic hierarchy process of multicriteria decision-making. The purpose of this note is threefold. First, we point out the questionable results in this paper. Second, for three by three comparison matrices, we provide a patchwork for his method. Third, we constructed a counter example to show that in general his method is wrong. Numerical examples are provided to illustrate our findings. If there are four or more alternatives, then we may advise researchers to ignore his results to avoid questionable estimation of group consistency.

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