Papers by Radhanon Diewvilai
Energies
In power system planning, the growth of renewable energy generation leads to several challenges i... more In power system planning, the growth of renewable energy generation leads to several challenges including system reliability due to its intermittency and uncertainty. To quantify the relatively reliable capacity of this generation, capacity credit is usually adopted for long-term power system planning. This paper proposes an evaluation of the capacity credit of renewable energy generation using stochastic models for resource availability. Six renewable energy generation types including wind, solar PV, small hydro, biomass, biogas, and waste were considered. The proposed models are based on the stochastic process using the Wiener process and other probability distribution functions to explain the randomness of the intermittency. Moreover, for solar PV—the generation of which depends on two key random variables, namely irradiance and temperature—a copula function is used to model their joint probabilistic behavior. These proposed models are used to simulate power outputs of renewable ...
Energies, May 27, 2022
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
The 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thailand - Conference 2011, 2011
ABSTRACT Reserve margin is one of the generation system reliability indices which should be appro... more ABSTRACT Reserve margin is one of the generation system reliability indices which should be appropriately defined. Too high reserve margin causes over-investment in generation system whereas too low reserve margin may result in unacceptable generation risk. This paper proposes method to calculate the value of appropriate reserve margin based on probabilistic method using a reliability index, i.e. Loss of Load Expectation (LOLE). Three generic capacities, i.e. 250, 500, and 750 MW, are used and tested with a modified Thailand system to obtain a range of appropriate reserve margin.
Energies
This paper proposes a methodology to develop generation expansion plans considering energy storag... more This paper proposes a methodology to develop generation expansion plans considering energy storage systems (ESSs), individual generation unit characteristics, and full-year hourly power balance constraints. Generation expansion planning (GEP) is a complex optimization problem. To get a realistic plan with the lowest cost, acceptable system reliability, and satisfactory CO2 emissions for the coming decades, a complex multi-period mixed integer linear programming (MILP) model needs to be formulated and solved with individual unit characteristics along with hourly power balance constraints. This problem requires huge computational effort since there are thousands of possible scenarios with millions of variables in a single calculation. However, in this paper, instead of finding the globally optimal solutions of such MILPs directly, a simplification process is proposed, breaking it down into multiple LP subproblems, which are easier to solve. In each subproblem, constraints relating to ...
2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology, 2012
ABSTRACT Demand side management (DSM) can help reduce demand of the system, resulting in less gen... more ABSTRACT Demand side management (DSM) can help reduce demand of the system, resulting in less generating capacity and less total production cost in the future. Generally, each DSM activity, e.g., replacing old with new higher efficiency equipment, has its own cost. Its worth in the system may be used as one of the decision components. Therefore, the methodology in evaluating the DSM worth under the framework of long-term generation system planning will be proposed in this paper. With the obtained results, the system planners will be able to select DSM programs more appropriately.
2012 9th International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology, 2012
ABSTRACT In this paper, the impact of renewable energy penetration to Thailand generation system ... more ABSTRACT In this paper, the impact of renewable energy penetration to Thailand generation system is investigated from 2010 to 2030 by using scenario based analysis. Energy accounting model based on probabilistic method is used to calculate system indices and handle the balance of energy demand and supply. The baseline scenario is developed from Thailand Power Development Plan 2010 (PDP2010), whereas other possible scenarios, e.g., 10%, 20%, and 30% renewable energy, are simulated. Then, the impact is comparatively analyzed through indices, e.g., reserve margin (RM), fuel diversity, average cost, and average CO2 emission. With the obtained results, critical system impacts will be determined and used as a guideline for strategic planning and long-term preparation for Thailand power system.
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Papers by Radhanon Diewvilai