This paper provides the convex hull description for the basic operation of slowand quick-start units in power-based unit commitment (UC) problems. The basic operating constraints that are modeled for both types of units are (1) generation limits and (2) minimum up and down times. Apart from this, the startup and shutdown processes are also modeled, using (3) startup and shutdown power trajector...

The increasing penetration of uncertain generation such as wind and solar in power systems imposes new challenges to the Unit Commitment (UC) problem, one of the most critical tasks in power systems operations. The two most common approaches to address these challenges — stochastic and robust optimization — have drawbacks that prevent or restrict their application to real-world systems. This pa...

In the recent decade, renewable energy sources (RES) such as wind and photovoltaic (PV) power generations gained more attention. However, despite their proven role in reduction of operating costs network, integration has some serious challenges inherent uncertainties balance at grid. Some options to face these challenges, well enhance network’s flexibility, are demand response (DR), distributed...

Abstract Because of the enormous economic gain it may offer, unit commitment (UC) has been a primary optimization job in daily operation planning contemporary power systems. The AC optimal flow (ACOPF) constraint is method for determining ideal load arrangement alternating current (AC) Using and ACOPF limitations to determine distribution an important approach ensure steady functioning with exa...

in this paper, a stochastic two-stage model is offered for optimization of the day-ahead scheduling of the microgrid. system uncertainties including dispatchable distributed generation and energy storage contingencies are considered in the stochastic model. for handling uncertainties, monte carlo simulation is employed for generation several scenarios and then a reduction method is used to d...

The unit commitment (UC) problem is a very important problem in the power industry [1]. It seeks to minimize system-wide operational costs of power generators by providing an optimal schedule of power production while meet the demand and other technical constraints. By the combinatorial nature of the operational constraints, UC problem is difficult to solve to optimality for practical large-sca...

Received Dec 24, 2016 Revised Apr 26, 2017 Accepted Jun 14, 2017 The augment of ecological shield and the progressive exhaustion of traditional fossil energy sources have increased the interests in integrating renewable energy sources into existing power system. Wind power is becoming worldwide a significant component of the power generation portfolio. Profuse literatures have been reported for...

Unit Commitment (UC) is a fundamental problem in power system operations. When coupled with generation maintenance, the joint optimization poses significant computational challenges due to coupling constraints linking maintenance and UC decisions. Obviously, these grow size of network. With introduction sensors for monitoring generator health condition-based maintenance(CBM), have been magnifie...

We present a unified framework for obtaining black-box constructions of Universal Composable (UC) protocol in trusted setup models. Our result is analogous to the unified framework of Lin, Pass, and Venkitasubramaniam [STOC’09, Asiacrypt’12] that, however, only yields non-black-box constructions of UC protocols. Our unified framework shows that to obtain black-box constructions of UC protocols,...

In the deregulated electricity market, secure operation is an enduring concern of the independent system operator (ISO). For a secure and economical hourly generation schedule of the day ahead market, ISO executes the security constrained unit commitment (SCUC) problem. In this paper, a new formulation of SCUC problem, considering more practical constraints are presented. The proposed SCUC form...