Experiences with Mixed Integer Linear Programming-Based Approaches in Short-Term Hydro Scheduling

Academic software for optimizing supply‐side bids in a wholesale electricity market

“…In Refs. 3, 4, the HC is made linear in two sections, the first one starts in the minimal power output up to the power for best efficiency and the second one starts in the best efficiency up to the maximal power output. In Ref.…”

“…In this article, the model for defining the optimal hydro profit is based on Ref. 4. The plant performance chart (PPC), that is, the relation between the water discharged and the energy produced, is represented through a concave piece‐wise linear approximation of the HC.…”

“…Specifically, this article is centered on OPTIOFER (Optimización de Ofertas, in Spanish): software for the formulation and analysis of supply‐side power bids. This tool defines the hydro 3–9 or thermal 10–12 optimal power bid to be used subsequently in a clearing process between both generation bids and demand offers. This clearing process will be carried out in a different software package, which will not be subject to study in this article.…”

Multi-level Evaluation of Load Supply Adequacy for Transmission Network

“…Secondly, it is too conservative to evaluate load supply adequacy index by increasing generation at equivalent ratio to meet bus load growth. Hence, this article presents multi-level load sup-ply adequacy evaluation method, which evaluates load supply adequacy from bus, zone and system level, and integrates sensitivity factor based evaluation method and continuous security constrained generation optimization based evaluation method [3][4][5][6][7][8] to make the index more accurate reflect load supply adequacy of transmission network. Based on multi-level load supply adequacy evaluation, the online short term load supply adequacy evaluation system is designed and implemented.…”

Transmission system reconfiguration for corrective control

“…Another attraction of LP approach is its capability to consider integer variables using mixed integer linear programming (MILP) technique. The MILP approach is mainly used for the unit commitment problem [38]- [40]. However, it eventually becomes a powerful technique for corrective switching and transmission planning [37], [41]- [42], since many power system control actions involve discrete variables, such as transmission line switching, shunt element switching, and transformer tap changing.…”