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Showing 1 to 20 of 52 for “"Unit Commitment"”.
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Fuel-constrained unit commitment
… system constraints, which are often conflicting. Unit commitment, which determines each generator's on/ off status and the power output level, is one of these scheduling activities in the day-to-day operations of the utility companies. The solution of the unit commitment problem minimizes the …
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Unit commitment for operations
The topic of unit commitment has been and continues to be of interest to many researchers and is a primary operation for most utilities. Past research has utilized integer programming, dynamic programming, linear programming, gradient, and heuristic techniques. This research combines both linear …
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Unit commitment : tight formulation and pricing
… up and shut down more frequently. These discrete commitment decisions, optimized in the unit commitment (UC) problem, have an impact on system operations as well as generation expansion planning (GEP). The non-convex costs associated with the commitment decisions may also lead to generators' …
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Stochastic unit commitment in a deregulated electric utility industry
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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SPINNING RESERVE ASSESSMENT IN INTERCONNECTED GENERATION SYSTEMS
… use deterministic techniques to evaluate unit commitment and spinning reserve requirements. Deterministic approaches do not specifically take into account the stochastic behaviour of system components in the determination of spinning reserve requirements. A probabilistic technique …
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A method of generation scheduling in electric utility systems with nuclear units
The problem of unit commitment in an electric utility system is analyzed. The types of generating units considered include nuclear-steam, fossil-steam, thermalpeaking, conventional and pumped-storage hydro. The large problem of generating unit commitment, due to the inclusion of the nuclear unit, …
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Incorporating operational flexibility into electric generation planning : impacts and methods for system design and policy analysis
… distinct power system models, from hourly unit-commitment operations to long-term generation planning. This formulation groups similar generators into clusters to reduce problem size, while still retaining the individual unit constraints required to accurately capture operating reserves and …
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Decision support for the production and distribution of electricity under load shedding
… of MW of electric power from generating units to consumers. This process requires different operations and planning to ensure the security of the entire system. Part of the daily or weekly operation system is the so called Unit Commitment problem which consists of scheduling the available …
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Contributions to Long-Term Electricity System Expansion Planning Through the Systematic Treatment of Data Uncertainty and Operational Assumptions
… and uncertainty in parameter requirements for unit commitment models used for validation. Two aspects of the first problem are explored. The first concerns the uncertainty surrounding the number of years of input data that is required to accurately represent electricity production from wind and …
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Impacts of demand response resources on scheduling and prices in day-ahead electricity markets
… to as demand response resources (DRRs). The unit commitment problem is used as the vehicle for the study and to evaluate the changes in the operating schedules of the supply-side resources and the resulting prices. In the study, the load recovery effects that accompany the load curtailment …
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Machine Learning based Methods to Improve Power System Operation under High Renewable Pennetration
… to becoming carbon neutral around 2050. In the United States, the Biden ad- ministration has called for 100% clean energy by 2035. It is estimated that in order to meet that target, the energy production from solar and wind should increase to 50-70% from the current 11% share. Under higher …
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Advances in electric power systems : robustness, adaptability, and fairness
… focus on the first issue in the context of the unit commitment (UC) problem, one of the most critical daily operations of an electric power system. Unit commitment in large scale power systems faces new challenges of increasing uncertainty from both generation and load. We propose an adaptive …
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A Unified Adaptive Robust Optimization Approach to Electricity Markets Under Uncertainty
… out-of-market processes, like the Reliability Unit Commitment (RUC), under adaptive robust optimization (ARO). Through ARO, we explicitly procure and price flexibility using adaptive reserve products that provide generation plans contingent on the uncertainty in the RTM. The grid uncertainty is …
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Data-driven models for uncertainty and behavior
… an application of the above technique to the unit commitment problem. Unit commitment is a large-scale, multistage optimization problem under uncertainty that is critical to power system operations. Using real data from the New England market, we illustrate how our proposed data-driven …
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Valuing of inertia and fast-acting storage devices in interconnected power grids
… ancillary service designs for non-conventional units require test systems that represent the characteristic complexity and features of actual power systems. To provide insightful, realistic simulation results, a systematic method based on statistics summarized from actual system models and …
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Optimization of Financial Transmission Right Portfolios Using Risk-Reward Analysis of Deregulated Power Systems
… A computer model based on Security-Constrained Unit Commitment Problem and Risk-Reward Analysis is developed to simulate various operating conditions of a power system and predict the variations of power flows and corresponding electricity prices. It offers guidelines about the bidding cost and …
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Optimal scheduling of thermal generating units in electric power systems
The Unit Commitment Problem (UCP) in electric power system problem that consists of finding the startup and shutdown schedule of generating units over a period of time (e.g., 24 hrs) so that the operating cost is minimized; The UCP is often characterized by its prohibitive computational time and …
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Power Grid Management in Response to Extreme Events
… a novel Event-driven Security Constrained Unit Commitment (E-SCUC) model and a statistical method, based on regression and data mining to estimate the system components outages, are proposed. The proposed models help consider the simultaneous outage of several system components represented …
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Coupled natural gas and electric power systems
… reduction technique to solve the hourly unit commitment problem over different tem- poral scales; a technique to evaluate a firm's forward capacity market offer, including a probabilistic approach to evaluate the risk of forced outages; a case study of New England's gas-electricity …
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