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Open AccessArticle

Stochastic Unit Commitment and Optimal Power Trading Incorporating PV Uncertainty

1
Department of Electrical and Electronics Engineering, University of the Ryukyus, Okinawa 903-0213, Japan
2
Department of Electrical Power and Machines, Zagazig University, Zagazig 44519, Egypt
3
Department of Electrical and Electronics Engineering, SASTRA Deemed University, Thanjavur-613401, India
*
Author to whom correspondence should be addressed.
Sustainability 2019, 11(16), 4504; https://doi.org/10.3390/su11164504
Received: 1 August 2019 / Revised: 14 August 2019 / Accepted: 15 August 2019 / Published: 20 August 2019
(This article belongs to the Collection Sustainable Electric Power Systems Research)
This paper focuses on the optimal unit commitment (UC) scheme along with optimal power trading for the Northeast Power System (NEPS) of Afghanistan with a penetration of 230 MW of PV power energy. The NEPS is the biggest power system of Afghanistan fed from three main sources; 1. Afghanistan’s own power generation units (three thermal units and three hydro units); 2. imported power from Tajikistan; 3. imported power from Uzbekistan. PV power forecasting fluctuations have been handled by means of 50 scenarios generated by Latin-hypercube sampling (LHS) after getting the point solar radiation forecast through the neural network (NN) toolbox. To carry out the analysis, we consider three deterministic UC and two stochastic UC cases with a two-stage programming model that indicates the day-ahead UC as the first stage and the intra-day operation of the system as the second stage. A binary-real genetic algorithm is coded in MATLAB software to optimize the proposed cases in terms of thermal units’ operation costs, import power tariffs, as well as from the perspective of the system reliability risks expressed as the reserve and load not served costs. The results indicate that in the deterministic UC models, the risk of reserve and load curtailment does exist. The stochastic UC approaches including the optimal power trading are superior to the deterministic ones. Moreover, the scheduled UC costs and reserves are different from the actual ones. View Full-Text
Keywords: stochastic unit commitment; optimal power trading; Afghanistan; PV uncertainty; binary-real-coded genetic algorithm stochastic unit commitment; optimal power trading; Afghanistan; PV uncertainty; binary-real-coded genetic algorithm
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Sediqi, M.M.; Lotfy, M.E.; Ibrahimi, A.M.; Senjyu, T.; K, N. Stochastic Unit Commitment and Optimal Power Trading Incorporating PV Uncertainty. Sustainability 2019, 11, 4504.

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