The DC power flow model is in widespread utilization electricity-market applications and contingency analysis. presented versions of this can be classified into two categories: state-dependent, or Hot-Start, models state-independent, Cold-Start, models. A reasonable accuracy reported the literature regarding Hot-Start as they take account branch losses bus voltages by using available base point. On contrary, due to absence point Cold-Start models, must either neglected guessed (which an...

Large-scale and ubiquitous penetration of wind power generation to systems necessitates more conservative provision system reliability by ensuring adequately committed reserve observance transmission constraints. In addition, curtailment due the technical limitations operations, such as congestion, should be efficiently mitigated. To this aim, paper presents a congestion risk-aware unit commitment formulation in two-settlement market environment. The uncertainty impact multicorrelated...

Hourly wind power ramps in ERCOT are studied by applying extreme value theory. Mean excess plot reveals that the tail behavior of large hourly indeed follows a generalized Pareto distribution. The location, shape, and scale parameters distribution then determined using mean least square technique, from which risk measures including α quantile at conditional calculated.

Wind and solar (photovoltaic) power generations have rapidly evolved over the recent decades. Efficient reliable planning of system with significant penetration these resources brings challenges due to their fluctuating uncertain characteristics. In this paper, incorporation both PV wind units in unit commitment is investigated a risk-constrained solution problem presented. Considering contribution units, aim determine start-up/shut-down status as well amount generating for all thermal at...

With the deepening penetration of renewable resources worldwide, power system operators are faced with emerging challenges, e.g., increase operating risks due to volatility and uncertainty wind solar power. To efficiently identify operational limit violations, a switch from deterministic stochastic framework for assessing security, which could manage various types uncertainties, has been advocated in this paper. The established model is based on an improved probabilistic load flow, adapted...

Summary form only given. The DC power flow model is in widespread utilization electricity-market applications and contingency analysis. presented versions of this can be classified into two categories: state-dependent, or Hot-Start, models state-independent, Cold-Start, models. A reasonable accuracy reported the literature regarding Hot-Start as they take account branch losses bus voltages by using available base point. On contrary, due to absence point Cold-Start models, must either...

In this article we review the relationship between exceed rate of return and some financial ratios in accepted companies Tehran Stock Exchange. Therefore 43 company were selected investigated following periods separately pool. March 2001 to 2002 - 2003 2004 2005. The results showed that most cases changes on assets ratio, profit margin ratio & earning price could explain return. Also show among ratios, which them, income was a part calculating, had meaningful with This mentioned above,...

Real-time actuation of scheduled reserve capacity in power system operations with high penetration wind is prone to failure on account unexpected shortcomings network transfer capability. In this paper, a graph partitioning-based zoning method incorporated into the security-constrained unit commitment improve deliverability operating reserves zone and mitigate possible congestions caused by uncertain power. A representation proposed which edge weights are quantified likelihood secure...

Purpose – The purpose of this paper is to pursue two following main goals: first, theorizing a new concept named as equivalent bus load in order make promising simplification over power system analysis. Second, proposing an outstanding fast and simple approach based on introduced for voltage estimation after multiple component outages while satisfying required accuracy. Design/methodology/approach Equivalent theory introduces three transfer matrices that describe topology. Mentioned could be...

Penetration of Plug-in Electric Vehicles (PEVs) parking lots into distribution systems and microgrids offers useful decision tools for improving energy management operations power systems. In this paper, with an objective to minimize the operation cost while subject system, unit security constraints, a microgrid scheme is proposed, by taking account PEVs throughout grid as distributed storage responsive nodal prices. The presented method comprises ex-ante optimal dispatch anticipated cost,...

Security-constrained unit commitment is studied by taking into account multiple correlated wind sources and the deliverability of operating reserves in a reserve zone. A power transfer margin for each transmission line incorporated problem, so as to mitigate possible congestions caused uncertain non-dispatchable power. Specifically, margins lines are determined utilizing probabilistic information multi-locational generations, considering credible line-outage contingencies. The collectively...

This study presents a novel and comparative approach to select an optimal path during direct Z-Matrix building process using Evolutionary Algorithms (EAs). The proposed evolutionary methods are based on selection of series shunt elements (i.e., lines, transformers generators) in order for minimizing computation time. tested IEEE 14-bus benchmark the results compared. method is also arranged find considering all possible network alterations due faults avoid requirement repeating calculation...

Currently, most ISOs adopt offer cost minimization (OCM) auction mechanism which minimizes the total cost, and then, a settlement rule based on either locational marginal prices (LMPs) or market clearing price (MCP) is used to determine payments committed units, not compatible with because minimized different from payment calculated by rule. This inconsistency can drastically increase cost. On other hand, (PCM) eliminates this inconsistency; however, PCM problem nonlinear self-referring...

The outage of a transmission line may change the system phase angle differences to point that experience stress conditions. Hence, for post-contingency condition lines should be predicted in real time operation. However, online line-based difference monitoring and prediction power assessment is not universal operating practice yet. Thus, this paper, an framework proposed by developing convolutional neural network (CNN) module trained through Deep Learning approach. In framework, continuously...